Use packages list to find packages

46 files changed, 16122 insertions, 82 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 704b4c5..c520405 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,8 @@ set(SOURCE_FILES
         src/GlobalLib.cpp
         src/curl.cpp
         src/Archive.cpp
-        src/CmakeModule.cpp)
+        src/CmakeModule.cpp
+        src/Package.cpp)
 
 find_package(CURL REQUIRED)
 find_package(LibArchive REQUIRED)
diff --git a/backend/ninja/Ninja.cpp b/backend/ninja/Ninja.cpp
index def62fa..1990926 100644
--- a/backend/ninja/Ninja.cpp
+++ b/backend/ninja/Ninja.cpp
@@ -236,20 +236,6 @@ namespace backend
         return false;
     }
 
-#if OS_FAMILY == OS_FAMILY_POSIX
-    Result<bool> validatePkgConfigPackageVersionExists(const Dependency &dependency)
-    {
-        Result<bool> dependencyValidationResult = PkgConfig::validatePackageExists(dependency.name);
-        if(dependencyValidationResult.isErr())
-            return Result<bool>::Err(dependencyValidationResult.getErrMsg());
-
-        Result<bool> dependencyVersionValidationResult = PkgConfig::validatePackageVersionAtLeast(dependency.name, dependency.version);
-        if(dependencyVersionValidationResult.isErr())
-            return Result<bool>::Err(dependencyVersionValidationResult.getErrMsg());
-
-        return Result<bool>::Ok(true);
-    }
-#endif
     // TODO: First check if pkg-config is installed. If it's not, only check dependencies that exists in the dependencies sub directory.
     // If pkg-config is installed and dependency is not installed, check in dependencies sub directory.
     Result<bool> Ninja::getLinkerFlags(const SibsConfig &config, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallback, GlobalIncludeDirCallbackFunc globalIncludeDirCallback) const
@@ -271,7 +257,7 @@ namespace backend
         vector<Dependency> pkgConfigDependencies;
         for(const Dependency &dependency : dependencies)
         {
-            Result<bool> pkgConfigDependencyValidation = validatePkgConfigPackageVersionExists(dependency);
+            Result<bool> pkgConfigDependencyValidation = PkgConfig::validatePkgConfigPackageVersionExists(dependency);
             if(pkgConfigDependencyValidation.isOk())
             {
                 pkgConfigDependencies.push_back(dependency);
@@ -305,40 +291,7 @@ namespace backend
         }
 #endif
 
-        for(const Dependency &globalLibDependency : globalLibDependencies)
-        {
-            printf("Dependency %s is missing from pkg-config, trying global lib\n", globalLibDependency.name.c_str());
-            Result<bool> globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(config, globalLibDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback, globalIncludeDirCallback);
-            if(globalLibLinkerFlagsResult.isErr())
-            {
-                if(globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_NOT_FOUND || globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_VERSION_NO_MATCH)
-                {
-                    printf("Dependency not found in global lib, trying to download from github\n");
-                    // TODO: Download several dependencies at the same time by adding them to a list
-                    // and then iterate them and download them all using several threads.
-                    // All dependecies should be downloaded at the same time, this includes dependencies of dependencies.
-                    // If a dependency is missing, fail build BEFORE downloading dependencies and before compiling anything.
-                    // You do not want to possibly wait several minutes only for build to fail when there is no compilation error.
-
-                    // TODO: If return error is invalid url, then the message should be converted to
-                    // invalid package name/version. A check should be done if it is the name or version
-                    // that is invalid.
-                    Result<bool> downloadDependencyResult = GlobalLib::downloadDependency(globalLibDependency);
-                    if(downloadDependencyResult.isErr())
-                        return downloadDependencyResult;
-
-                    globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(config, globalLibDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback, globalIncludeDirCallback);
-                    if(globalLibLinkerFlagsResult.isErr())
-                        return Result<bool>::Err(globalLibLinkerFlagsResult);
-                }
-                else
-                {
-                    return Result<bool>::Err(globalLibLinkerFlagsResult);
-                }
-            }
-        }
-
-        return Result<bool>::Ok(true);
+        return GlobalLib::getLibs(globalLibDependencies, config, globalLibDir, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallback, globalIncludeDirCallback);
     }
 
     Result<bool> Ninja::build(const SibsConfig &config, const _tinydir_char_t *savePath, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallback, GlobalIncludeDirCallbackFunc globalIncludeDirCallback)
diff --git a/external/rapidjson/allocators.h b/external/rapidjson/allocators.h
new file mode 100644
index 0000000..655f4a3
--- /dev/null
+++ b/external/rapidjson/allocators.h
@@ -0,0 +1,271 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_ALLOCATORS_H_
+#define RAPIDJSON_ALLOCATORS_H_
+
+#include "rapidjson.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+// Allocator
+
+/*! \class rapidjson::Allocator
+    \brief Concept for allocating, resizing and freeing memory block.
+    
+    Note that Malloc() and Realloc() are non-static but Free() is static.
+    
+    So if an allocator need to support Free(), it needs to put its pointer in 
+    the header of memory block.
+
+\code
+concept Allocator {
+    static const bool kNeedFree;    //!< Whether this allocator needs to call Free().
+
+    // Allocate a memory block.
+    // \param size of the memory block in bytes.
+    // \returns pointer to the memory block.
+    void* Malloc(size_t size);
+
+    // Resize a memory block.
+    // \param originalPtr The pointer to current memory block. Null pointer is permitted.
+    // \param originalSize The current size in bytes. (Design issue: since some allocator may not book-keep this, explicitly pass to it can save memory.)
+    // \param newSize the new size in bytes.
+    void* Realloc(void* originalPtr, size_t originalSize, size_t newSize);
+
+    // Free a memory block.
+    // \param pointer to the memory block. Null pointer is permitted.
+    static void Free(void *ptr);
+};
+\endcode
+*/
+
+///////////////////////////////////////////////////////////////////////////////
+// CrtAllocator
+
+//! C-runtime library allocator.
+/*! This class is just wrapper for standard C library memory routines.
+    \note implements Allocator concept
+*/
+class CrtAllocator {
+public:
+    static const bool kNeedFree = true;
+    void* Malloc(size_t size) { 
+        if (size) //  behavior of malloc(0) is implementation defined.
+            return std::malloc(size);
+        else
+            return NULL; // standardize to returning NULL.
+    }
+    void* Realloc(void* originalPtr, size_t originalSize, size_t newSize) {
+        (void)originalSize;
+        if (newSize == 0) {
+            std::free(originalPtr);
+            return NULL;
+        }
+        return std::realloc(originalPtr, newSize);
+    }
+    static void Free(void *ptr) { std::free(ptr); }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// MemoryPoolAllocator
+
+//! Default memory allocator used by the parser and DOM.
+/*! This allocator allocate memory blocks from pre-allocated memory chunks. 
+
+    It does not free memory blocks. And Realloc() only allocate new memory.
+
+    The memory chunks are allocated by BaseAllocator, which is CrtAllocator by default.
+
+    User may also supply a buffer as the first chunk.
+
+    If the user-buffer is full then additional chunks are allocated by BaseAllocator.
+
+    The user-buffer is not deallocated by this allocator.
+
+    \tparam BaseAllocator the allocator type for allocating memory chunks. Default is CrtAllocator.
+    \note implements Allocator concept
+*/
+template <typename BaseAllocator = CrtAllocator>
+class MemoryPoolAllocator {
+public:
+    static const bool kNeedFree = false;    //!< Tell users that no need to call Free() with this allocator. (concept Allocator)
+
+    //! Constructor with chunkSize.
+    /*! \param chunkSize The size of memory chunk. The default is kDefaultChunkSize.
+        \param baseAllocator The allocator for allocating memory chunks.
+    */
+    MemoryPoolAllocator(size_t chunkSize = kDefaultChunkCapacity, BaseAllocator* baseAllocator = 0) : 
+        chunkHead_(0), chunk_capacity_(chunkSize), userBuffer_(0), baseAllocator_(baseAllocator), ownBaseAllocator_(0)
+    {
+    }
+
+    //! Constructor with user-supplied buffer.
+    /*! The user buffer will be used firstly. When it is full, memory pool allocates new chunk with chunk size.
+
+        The user buffer will not be deallocated when this allocator is destructed.
+
+        \param buffer User supplied buffer.
+        \param size Size of the buffer in bytes. It must at least larger than sizeof(ChunkHeader).
+        \param chunkSize The size of memory chunk. The default is kDefaultChunkSize.
+        \param baseAllocator The allocator for allocating memory chunks.
+    */
+    MemoryPoolAllocator(void *buffer, size_t size, size_t chunkSize = kDefaultChunkCapacity, BaseAllocator* baseAllocator = 0) :
+        chunkHead_(0), chunk_capacity_(chunkSize), userBuffer_(buffer), baseAllocator_(baseAllocator), ownBaseAllocator_(0)
+    {
+        RAPIDJSON_ASSERT(buffer != 0);
+        RAPIDJSON_ASSERT(size > sizeof(ChunkHeader));
+        chunkHead_ = reinterpret_cast<ChunkHeader*>(buffer);
+        chunkHead_->capacity = size - sizeof(ChunkHeader);
+        chunkHead_->size = 0;
+        chunkHead_->next = 0;
+    }
+
+    //! Destructor.
+    /*! This deallocates all memory chunks, excluding the user-supplied buffer.
+    */
+    ~MemoryPoolAllocator() {
+        Clear();
+        RAPIDJSON_DELETE(ownBaseAllocator_);
+    }
+
+    //! Deallocates all memory chunks, excluding the user-supplied buffer.
+    void Clear() {
+        while (chunkHead_ && chunkHead_ != userBuffer_) {
+            ChunkHeader* next = chunkHead_->next;
+            baseAllocator_->Free(chunkHead_);
+            chunkHead_ = next;
+        }
+        if (chunkHead_ && chunkHead_ == userBuffer_)
+            chunkHead_->size = 0; // Clear user buffer
+    }
+
+    //! Computes the total capacity of allocated memory chunks.
+    /*! \return total capacity in bytes.
+    */
+    size_t Capacity() const {
+        size_t capacity = 0;
+        for (ChunkHeader* c = chunkHead_; c != 0; c = c->next)
+            capacity += c->capacity;
+        return capacity;
+    }
+
+    //! Computes the memory blocks allocated.
+    /*! \return total used bytes.
+    */
+    size_t Size() const {
+        size_t size = 0;
+        for (ChunkHeader* c = chunkHead_; c != 0; c = c->next)
+            size += c->size;
+        return size;
+    }
+
+    //! Allocates a memory block. (concept Allocator)
+    void* Malloc(size_t size) {
+        if (!size)
+            return NULL;
+
+        size = RAPIDJSON_ALIGN(size);
+        if (chunkHead_ == 0 || chunkHead_->size + size > chunkHead_->capacity)
+            if (!AddChunk(chunk_capacity_ > size ? chunk_capacity_ : size))
+                return NULL;
+
+        void *buffer = reinterpret_cast<char *>(chunkHead_) + RAPIDJSON_ALIGN(sizeof(ChunkHeader)) + chunkHead_->size;
+        chunkHead_->size += size;
+        return buffer;
+    }
+
+    //! Resizes a memory block (concept Allocator)
+    void* Realloc(void* originalPtr, size_t originalSize, size_t newSize) {
+        if (originalPtr == 0)
+            return Malloc(newSize);
+
+        if (newSize == 0)
+            return NULL;
+
+        originalSize = RAPIDJSON_ALIGN(originalSize);
+        newSize = RAPIDJSON_ALIGN(newSize);
+
+        // Do not shrink if new size is smaller than original
+        if (originalSize >= newSize)
+            return originalPtr;
+
+        // Simply expand it if it is the last allocation and there is sufficient space
+        if (originalPtr == reinterpret_cast<char *>(chunkHead_) + RAPIDJSON_ALIGN(sizeof(ChunkHeader)) + chunkHead_->size - originalSize) {
+            size_t increment = static_cast<size_t>(newSize - originalSize);
+            if (chunkHead_->size + increment <= chunkHead_->capacity) {
+                chunkHead_->size += increment;
+                return originalPtr;
+            }
+        }
+
+        // Realloc process: allocate and copy memory, do not free original buffer.
+        if (void* newBuffer = Malloc(newSize)) {
+            if (originalSize)
+                std::memcpy(newBuffer, originalPtr, originalSize);
+            return newBuffer;
+        }
+        else
+            return NULL;
+    }
+
+    //! Frees a memory block (concept Allocator)
+    static void Free(void *ptr) { (void)ptr; } // Do nothing
+
+private:
+    //! Copy constructor is not permitted.
+    MemoryPoolAllocator(const MemoryPoolAllocator& rhs) /* = delete */;
+    //! Copy assignment operator is not permitted.
+    MemoryPoolAllocator& operator=(const MemoryPoolAllocator& rhs) /* = delete */;
+
+    //! Creates a new chunk.
+    /*! \param capacity Capacity of the chunk in bytes.
+        \return true if success.
+    */
+    bool AddChunk(size_t capacity) {
+        if (!baseAllocator_)
+            ownBaseAllocator_ = baseAllocator_ = RAPIDJSON_NEW(BaseAllocator)();
+        if (ChunkHeader* chunk = reinterpret_cast<ChunkHeader*>(baseAllocator_->Malloc(RAPIDJSON_ALIGN(sizeof(ChunkHeader)) + capacity))) {
+            chunk->capacity = capacity;
+            chunk->size = 0;
+            chunk->next = chunkHead_;
+            chunkHead_ =  chunk;
+            return true;
+        }
+        else
+            return false;
+    }
+
+    static const int kDefaultChunkCapacity = 64 * 1024; //!< Default chunk capacity.
+
+    //! Chunk header for perpending to each chunk.
+    /*! Chunks are stored as a singly linked list.
+    */
+    struct ChunkHeader {
+        size_t capacity;    //!< Capacity of the chunk in bytes (excluding the header itself).
+        size_t size;        //!< Current size of allocated memory in bytes.
+        ChunkHeader *next;  //!< Next chunk in the linked list.
+    };
+
+    ChunkHeader *chunkHead_;    //!< Head of the chunk linked-list. Only the head chunk serves allocation.
+    size_t chunk_capacity_;     //!< The minimum capacity of chunk when they are allocated.
+    void *userBuffer_;          //!< User supplied buffer.
+    BaseAllocator* baseAllocator_;  //!< base allocator for allocating memory chunks.
+    BaseAllocator* ownBaseAllocator_;   //!< base allocator created by this object.
+};
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_ENCODINGS_H_
diff --git a/external/rapidjson/cursorstreamwrapper.h b/external/rapidjson/cursorstreamwrapper.h
new file mode 100644
index 0000000..52c11a7
--- /dev/null
+++ b/external/rapidjson/cursorstreamwrapper.h
@@ -0,0 +1,78 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+//
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_CURSORSTREAMWRAPPER_H_
+#define RAPIDJSON_CURSORSTREAMWRAPPER_H_
+
+#include "stream.h"
+
+#if defined(__GNUC__)
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+
+#if defined(_MSC_VER) && _MSC_VER <= 1800
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4702)  // unreachable code
+RAPIDJSON_DIAG_OFF(4512)  // assignment operator could not be generated
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+
+//! Cursor stream wrapper for counting line and column number if error exists.
+/*!
+    \tparam InputStream     Any stream that implements Stream Concept
+*/
+template <typename InputStream, typename Encoding = UTF8<> >
+class CursorStreamWrapper : public GenericStreamWrapper<InputStream, Encoding> {
+public:
+    typedef typename Encoding::Ch Ch;
+
+    CursorStreamWrapper(InputStream& is):
+        GenericStreamWrapper<InputStream, Encoding>(is), line_(1), col_(0) {}
+
+    // counting line and column number
+    Ch Take() {
+        Ch ch = this->is_.Take();
+        if(ch == '\n') {
+            line_ ++;
+            col_ = 0;
+        } else {
+            col_ ++;
+        }
+        return ch;
+    }
+
+    //! Get the error line number, if error exists.
+    size_t GetLine() const { return line_; }
+    //! Get the error column number, if error exists.
+    size_t GetColumn() const { return col_; }
+
+private:
+    size_t line_;   //!< Current Line
+    size_t col_;    //!< Current Column
+};
+
+#if defined(_MSC_VER) && _MSC_VER <= 1800
+RAPIDJSON_DIAG_POP
+#endif
+
+#if defined(__GNUC__)
+RAPIDJSON_DIAG_POP
+#endif
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_CURSORSTREAMWRAPPER_H_
diff --git a/external/rapidjson/document.h b/external/rapidjson/document.h
new file mode 100644
index 0000000..eb6d7dc
--- /dev/null
+++ b/external/rapidjson/document.h
@@ -0,0 +1,2630 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_DOCUMENT_H_
+#define RAPIDJSON_DOCUMENT_H_
+
+/*! \file document.h */
+
+#include "reader.h"
+#include "internal/meta.h"
+#include "internal/strfunc.h"
+#include "memorystream.h"
+#include "encodedstream.h"
+#include <new>      // placement new
+#include <limits>
+
+RAPIDJSON_DIAG_PUSH
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_OFF(4127) // conditional expression is constant
+RAPIDJSON_DIAG_OFF(4244) // conversion from kXxxFlags to 'uint16_t', possible loss of data
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_OFF(padded)
+RAPIDJSON_DIAG_OFF(switch-enum)
+RAPIDJSON_DIAG_OFF(c++98-compat)
+#endif
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_OFF(effc++)
+#if __GNUC__ >= 6
+RAPIDJSON_DIAG_OFF(terminate) // ignore throwing RAPIDJSON_ASSERT in RAPIDJSON_NOEXCEPT functions
+#endif
+#endif // __GNUC__
+
+#ifndef RAPIDJSON_NOMEMBERITERATORCLASS
+#include <iterator> // std::random_access_iterator_tag
+#endif
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+#include <utility> // std::move
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+// Forward declaration.
+template <typename Encoding, typename Allocator>
+class GenericValue;
+
+template <typename Encoding, typename Allocator, typename StackAllocator>
+class GenericDocument;
+
+//! Name-value pair in a JSON object value.
+/*!
+    This class was internal to GenericValue. It used to be a inner struct.
+    But a compiler (IBM XL C/C++ for AIX) have reported to have problem with that so it moved as a namespace scope struct.
+    https://code.google.com/p/rapidjson/issues/detail?id=64
+*/
+template <typename Encoding, typename Allocator> 
+struct GenericMember { 
+    GenericValue<Encoding, Allocator> name;     //!< name of member (must be a string)
+    GenericValue<Encoding, Allocator> value;    //!< value of member.
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericMemberIterator
+
+#ifndef RAPIDJSON_NOMEMBERITERATORCLASS
+
+//! (Constant) member iterator for a JSON object value
+/*!
+    \tparam Const Is this a constant iterator?
+    \tparam Encoding    Encoding of the value. (Even non-string values need to have the same encoding in a document)
+    \tparam Allocator   Allocator type for allocating memory of object, array and string.
+
+    This class implements a Random Access Iterator for GenericMember elements
+    of a GenericValue, see ISO/IEC 14882:2003(E) C++ standard, 24.1 [lib.iterator.requirements].
+
+    \note This iterator implementation is mainly intended to avoid implicit
+        conversions from iterator values to \c NULL,
+        e.g. from GenericValue::FindMember.
+
+    \note Define \c RAPIDJSON_NOMEMBERITERATORCLASS to fall back to a
+        pointer-based implementation, if your platform doesn't provide
+        the C++ <iterator> header.
+
+    \see GenericMember, GenericValue::MemberIterator, GenericValue::ConstMemberIterator
+ */
+template <bool Const, typename Encoding, typename Allocator>
+class GenericMemberIterator {
+
+    friend class GenericValue<Encoding,Allocator>;
+    template <bool, typename, typename> friend class GenericMemberIterator;
+
+    typedef GenericMember<Encoding,Allocator> PlainType;
+    typedef typename internal::MaybeAddConst<Const,PlainType>::Type ValueType;
+
+public:
+    //! Iterator type itself
+    typedef GenericMemberIterator Iterator;
+    //! Constant iterator type
+    typedef GenericMemberIterator<true,Encoding,Allocator>  ConstIterator;
+    //! Non-constant iterator type
+    typedef GenericMemberIterator<false,Encoding,Allocator> NonConstIterator;
+
+    /** \name std::iterator_traits support */
+    //@{
+    typedef ValueType      value_type;
+    typedef ValueType *    pointer;
+    typedef ValueType &    reference;
+    typedef std::ptrdiff_t difference_type;
+    typedef std::random_access_iterator_tag iterator_category;
+    //@}
+
+    //! Pointer to (const) GenericMember
+    typedef pointer         Pointer;
+    //! Reference to (const) GenericMember
+    typedef reference       Reference;
+    //! Signed integer type (e.g. \c ptrdiff_t)
+    typedef difference_type DifferenceType;
+
+    //! Default constructor (singular value)
+    /*! Creates an iterator pointing to no element.
+        \note All operations, except for comparisons, are undefined on such values.
+     */
+    GenericMemberIterator() : ptr_() {}
+
+    //! Iterator conversions to more const
+    /*!
+        \param it (Non-const) iterator to copy from
+
+        Allows the creation of an iterator from another GenericMemberIterator
+        that is "less const".  Especially, creating a non-constant iterator
+        from a constant iterator are disabled:
+        \li const -> non-const (not ok)
+        \li const -> const (ok)
+        \li non-const -> const (ok)
+        \li non-const -> non-const (ok)
+
+        \note If the \c Const template parameter is already \c false, this
+            constructor effectively defines a regular copy-constructor.
+            Otherwise, the copy constructor is implicitly defined.
+    */
+    GenericMemberIterator(const NonConstIterator & it) : ptr_(it.ptr_) {}
+    Iterator& operator=(const NonConstIterator & it) { ptr_ = it.ptr_; return *this; }
+
+    //! @name stepping
+    //@{
+    Iterator& operator++(){ ++ptr_; return *this; }
+    Iterator& operator--(){ --ptr_; return *this; }
+    Iterator  operator++(int){ Iterator old(*this); ++ptr_; return old; }
+    Iterator  operator--(int){ Iterator old(*this); --ptr_; return old; }
+    //@}
+
+    //! @name increment/decrement
+    //@{
+    Iterator operator+(DifferenceType n) const { return Iterator(ptr_+n); }
+    Iterator operator-(DifferenceType n) const { return Iterator(ptr_-n); }
+
+    Iterator& operator+=(DifferenceType n) { ptr_+=n; return *this; }
+    Iterator& operator-=(DifferenceType n) { ptr_-=n; return *this; }
+    //@}
+
+    //! @name relations
+    //@{
+    bool operator==(ConstIterator that) const { return ptr_ == that.ptr_; }
+    bool operator!=(ConstIterator that) const { return ptr_ != that.ptr_; }
+    bool operator<=(ConstIterator that) const { return ptr_ <= that.ptr_; }
+    bool operator>=(ConstIterator that) const { return ptr_ >= that.ptr_; }
+    bool operator< (ConstIterator that) const { return ptr_ < that.ptr_; }
+    bool operator> (ConstIterator that) const { return ptr_ > that.ptr_; }
+    //@}
+
+    //! @name dereference
+    //@{
+    Reference operator*() const { return *ptr_; }
+    Pointer   operator->() const { return ptr_; }
+    Reference operator[](DifferenceType n) const { return ptr_[n]; }
+    //@}
+
+    //! Distance
+    DifferenceType operator-(ConstIterator that) const { return ptr_-that.ptr_; }
+
+private:
+    //! Internal constructor from plain pointer
+    explicit GenericMemberIterator(Pointer p) : ptr_(p) {}
+
+    Pointer ptr_; //!< raw pointer
+};
+
+#else // RAPIDJSON_NOMEMBERITERATORCLASS
+
+// class-based member iterator implementation disabled, use plain pointers
+
+template <bool Const, typename Encoding, typename Allocator>
+struct GenericMemberIterator;
+
+//! non-const GenericMemberIterator
+template <typename Encoding, typename Allocator>
+struct GenericMemberIterator<false,Encoding,Allocator> {
+    //! use plain pointer as iterator type
+    typedef GenericMember<Encoding,Allocator>* Iterator;
+};
+//! const GenericMemberIterator
+template <typename Encoding, typename Allocator>
+struct GenericMemberIterator<true,Encoding,Allocator> {
+    //! use plain const pointer as iterator type
+    typedef const GenericMember<Encoding,Allocator>* Iterator;
+};
+
+#endif // RAPIDJSON_NOMEMBERITERATORCLASS
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericStringRef
+
+//! Reference to a constant string (not taking a copy)
+/*!
+    \tparam CharType character type of the string
+
+    This helper class is used to automatically infer constant string
+    references for string literals, especially from \c const \b (!)
+    character arrays.
+
+    The main use is for creating JSON string values without copying the
+    source string via an \ref Allocator.  This requires that the referenced
+    string pointers have a sufficient lifetime, which exceeds the lifetime
+    of the associated GenericValue.
+
+    \b Example
+    \code
+    Value v("foo");   // ok, no need to copy & calculate length
+    const char foo[] = "foo";
+    v.SetString(foo); // ok
+
+    const char* bar = foo;
+    // Value x(bar); // not ok, can't rely on bar's lifetime
+    Value x(StringRef(bar)); // lifetime explicitly guaranteed by user
+    Value y(StringRef(bar, 3));  // ok, explicitly pass length
+    \endcode
+
+    \see StringRef, GenericValue::SetString
+*/
+template<typename CharType>
+struct GenericStringRef {
+    typedef CharType Ch; //!< character type of the string
+
+    //! Create string reference from \c const character array
+#ifndef __clang__ // -Wdocumentation
+    /*!
+        This constructor implicitly creates a constant string reference from
+        a \c const character array.  It has better performance than
+        \ref StringRef(const CharType*) by inferring the string \ref length
+        from the array length, and also supports strings containing null
+        characters.
+
+        \tparam N length of the string, automatically inferred
+
+        \param str Constant character array, lifetime assumed to be longer
+            than the use of the string in e.g. a GenericValue
+
+        \post \ref s == str
+
+        \note Constant complexity.
+        \note There is a hidden, private overload to disallow references to
+            non-const character arrays to be created via this constructor.
+            By this, e.g. function-scope arrays used to be filled via
+            \c snprintf are excluded from consideration.
+            In such cases, the referenced string should be \b copied to the
+            GenericValue instead.
+     */
+#endif
+    template<SizeType N>
+    GenericStringRef(const CharType (&str)[N]) RAPIDJSON_NOEXCEPT
+        : s(str), length(N-1) {}
+
+    //! Explicitly create string reference from \c const character pointer
+#ifndef __clang__ // -Wdocumentation
+    /*!
+        This constructor can be used to \b explicitly  create a reference to
+        a constant string pointer.
+
+        \see StringRef(const CharType*)
+
+        \param str Constant character pointer, lifetime assumed to be longer
+            than the use of the string in e.g. a GenericValue
+
+        \post \ref s == str
+
+        \note There is a hidden, private overload to disallow references to
+            non-const character arrays to be created via this constructor.
+            By this, e.g. function-scope arrays used to be filled via
+            \c snprintf are excluded from consideration.
+            In such cases, the referenced string should be \b copied to the
+            GenericValue instead.
+     */
+#endif
+    explicit GenericStringRef(const CharType* str)
+        : s(str), length(NotNullStrLen(str)) {}
+
+    //! Create constant string reference from pointer and length
+#ifndef __clang__ // -Wdocumentation
+    /*! \param str constant string, lifetime assumed to be longer than the use of the string in e.g. a GenericValue
+        \param len length of the string, excluding the trailing NULL terminator
+
+        \post \ref s == str && \ref length == len
+        \note Constant complexity.
+     */
+#endif
+    GenericStringRef(const CharType* str, SizeType len)
+        : s(RAPIDJSON_LIKELY(str) ? str : emptyString), length(len) { RAPIDJSON_ASSERT(str != 0 || len == 0u); }
+
+    GenericStringRef(const GenericStringRef& rhs) : s(rhs.s), length(rhs.length) {}
+
+    //! implicit conversion to plain CharType pointer
+    operator const Ch *() const { return s; }
+
+    const Ch* const s; //!< plain CharType pointer
+    const SizeType length; //!< length of the string (excluding the trailing NULL terminator)
+
+private:
+    SizeType NotNullStrLen(const CharType* str) {
+        RAPIDJSON_ASSERT(str != 0);
+        return internal::StrLen(str);
+    }
+
+    /// Empty string - used when passing in a NULL pointer
+    static const Ch emptyString[];
+
+    //! Disallow construction from non-const array
+    template<SizeType N>
+    GenericStringRef(CharType (&str)[N]) /* = delete */;
+    //! Copy assignment operator not permitted - immutable type
+    GenericStringRef& operator=(const GenericStringRef& rhs) /* = delete */;
+};
+
+template<typename CharType>
+const CharType GenericStringRef<CharType>::emptyString[] = { CharType() };
+
+//! Mark a character pointer as constant string
+/*! Mark a plain character pointer as a "string literal".  This function
+    can be used to avoid copying a character string to be referenced as a
+    value in a JSON GenericValue object, if the string's lifetime is known
+    to be valid long enough.
+    \tparam CharType Character type of the string
+    \param str Constant string, lifetime assumed to be longer than the use of the string in e.g. a GenericValue
+    \return GenericStringRef string reference object
+    \relatesalso GenericStringRef
+
+    \see GenericValue::GenericValue(StringRefType), GenericValue::operator=(StringRefType), GenericValue::SetString(StringRefType), GenericValue::PushBack(StringRefType, Allocator&), GenericValue::AddMember
+*/
+template<typename CharType>
+inline GenericStringRef<CharType> StringRef(const CharType* str) {
+    return GenericStringRef<CharType>(str);
+}
+
+//! Mark a character pointer as constant string
+/*! Mark a plain character pointer as a "string literal".  This function
+    can be used to avoid copying a character string to be referenced as a
+    value in a JSON GenericValue object, if the string's lifetime is known
+    to be valid long enough.
+
+    This version has better performance with supplied length, and also
+    supports string containing null characters.
+
+    \tparam CharType character type of the string
+    \param str Constant string, lifetime assumed to be longer than the use of the string in e.g. a GenericValue
+    \param length The length of source string.
+    \return GenericStringRef string reference object
+    \relatesalso GenericStringRef
+*/
+template<typename CharType>
+inline GenericStringRef<CharType> StringRef(const CharType* str, size_t length) {
+    return GenericStringRef<CharType>(str, SizeType(length));
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+//! Mark a string object as constant string
+/*! Mark a string object (e.g. \c std::string) as a "string literal".
+    This function can be used to avoid copying a string to be referenced as a
+    value in a JSON GenericValue object, if the string's lifetime is known
+    to be valid long enough.
+
+    \tparam CharType character type of the string
+    \param str Constant string, lifetime assumed to be longer than the use of the string in e.g. a GenericValue
+    \return GenericStringRef string reference object
+    \relatesalso GenericStringRef
+    \note Requires the definition of the preprocessor symbol \ref RAPIDJSON_HAS_STDSTRING.
+*/
+template<typename CharType>
+inline GenericStringRef<CharType> StringRef(const std::basic_string<CharType>& str) {
+    return GenericStringRef<CharType>(str.data(), SizeType(str.size()));
+}
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericValue type traits
+namespace internal {
+
+template <typename T, typename Encoding = void, typename Allocator = void>
+struct IsGenericValueImpl : FalseType {};
+
+// select candidates according to nested encoding and allocator types
+template <typename T> struct IsGenericValueImpl<T, typename Void<typename T::EncodingType>::Type, typename Void<typename T::AllocatorType>::Type>
+    : IsBaseOf<GenericValue<typename T::EncodingType, typename T::AllocatorType>, T>::Type {};
+
+// helper to match arbitrary GenericValue instantiations, including derived classes
+template <typename T> struct IsGenericValue : IsGenericValueImpl<T>::Type {};
+
+} // namespace internal
+
+///////////////////////////////////////////////////////////////////////////////
+// TypeHelper
+
+namespace internal {
+
+template <typename ValueType, typename T>
+struct TypeHelper {};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, bool> {
+    static bool Is(const ValueType& v) { return v.IsBool(); }
+    static bool Get(const ValueType& v) { return v.GetBool(); }
+    static ValueType& Set(ValueType& v, bool data) { return v.SetBool(data); }
+    static ValueType& Set(ValueType& v, bool data, typename ValueType::AllocatorType&) { return v.SetBool(data); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, int> {
+    static bool Is(const ValueType& v) { return v.IsInt(); }
+    static int Get(const ValueType& v) { return v.GetInt(); }
+    static ValueType& Set(ValueType& v, int data) { return v.SetInt(data); }
+    static ValueType& Set(ValueType& v, int data, typename ValueType::AllocatorType&) { return v.SetInt(data); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, unsigned> {
+    static bool Is(const ValueType& v) { return v.IsUint(); }
+    static unsigned Get(const ValueType& v) { return v.GetUint(); }
+    static ValueType& Set(ValueType& v, unsigned data) { return v.SetUint(data); }
+    static ValueType& Set(ValueType& v, unsigned data, typename ValueType::AllocatorType&) { return v.SetUint(data); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, int64_t> {
+    static bool Is(const ValueType& v) { return v.IsInt64(); }
+    static int64_t Get(const ValueType& v) { return v.GetInt64(); }
+    static ValueType& Set(ValueType& v, int64_t data) { return v.SetInt64(data); }
+    static ValueType& Set(ValueType& v, int64_t data, typename ValueType::AllocatorType&) { return v.SetInt64(data); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, uint64_t> {
+    static bool Is(const ValueType& v) { return v.IsUint64(); }
+    static uint64_t Get(const ValueType& v) { return v.GetUint64(); }
+    static ValueType& Set(ValueType& v, uint64_t data) { return v.SetUint64(data); }
+    static ValueType& Set(ValueType& v, uint64_t data, typename ValueType::AllocatorType&) { return v.SetUint64(data); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, double> {
+    static bool Is(const ValueType& v) { return v.IsDouble(); }
+    static double Get(const ValueType& v) { return v.GetDouble(); }
+    static ValueType& Set(ValueType& v, double data) { return v.SetDouble(data); }
+    static ValueType& Set(ValueType& v, double data, typename ValueType::AllocatorType&) { return v.SetDouble(data); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, float> {
+    static bool Is(const ValueType& v) { return v.IsFloat(); }
+    static float Get(const ValueType& v) { return v.GetFloat(); }
+    static ValueType& Set(ValueType& v, float data) { return v.SetFloat(data); }
+    static ValueType& Set(ValueType& v, float data, typename ValueType::AllocatorType&) { return v.SetFloat(data); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, const typename ValueType::Ch*> {
+    typedef const typename ValueType::Ch* StringType;
+    static bool Is(const ValueType& v) { return v.IsString(); }
+    static StringType Get(const ValueType& v) { return v.GetString(); }
+    static ValueType& Set(ValueType& v, const StringType data) { return v.SetString(typename ValueType::StringRefType(data)); }
+    static ValueType& Set(ValueType& v, const StringType data, typename ValueType::AllocatorType& a) { return v.SetString(data, a); }
+};
+
+#if RAPIDJSON_HAS_STDSTRING
+template<typename ValueType> 
+struct TypeHelper<ValueType, std::basic_string<typename ValueType::Ch> > {
+    typedef std::basic_string<typename ValueType::Ch> StringType;
+    static bool Is(const ValueType& v) { return v.IsString(); }
+    static StringType Get(const ValueType& v) { return StringType(v.GetString(), v.GetStringLength()); }
+    static ValueType& Set(ValueType& v, const StringType& data, typename ValueType::AllocatorType& a) { return v.SetString(data, a); }
+};
+#endif
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, typename ValueType::Array> {
+    typedef typename ValueType::Array ArrayType;
+    static bool Is(const ValueType& v) { return v.IsArray(); }
+    static ArrayType Get(ValueType& v) { return v.GetArray(); }
+    static ValueType& Set(ValueType& v, ArrayType data) { return v = data; }
+    static ValueType& Set(ValueType& v, ArrayType data, typename ValueType::AllocatorType&) { return v = data; }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, typename ValueType::ConstArray> {
+    typedef typename ValueType::ConstArray ArrayType;
+    static bool Is(const ValueType& v) { return v.IsArray(); }
+    static ArrayType Get(const ValueType& v) { return v.GetArray(); }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, typename ValueType::Object> {
+    typedef typename ValueType::Object ObjectType;
+    static bool Is(const ValueType& v) { return v.IsObject(); }
+    static ObjectType Get(ValueType& v) { return v.GetObject(); }
+    static ValueType& Set(ValueType& v, ObjectType data) { return v = data; }
+    static ValueType& Set(ValueType& v, ObjectType data, typename ValueType::AllocatorType&) { return v = data; }
+};
+
+template<typename ValueType> 
+struct TypeHelper<ValueType, typename ValueType::ConstObject> {
+    typedef typename ValueType::ConstObject ObjectType;
+    static bool Is(const ValueType& v) { return v.IsObject(); }
+    static ObjectType Get(const ValueType& v) { return v.GetObject(); }
+};
+
+} // namespace internal
+
+// Forward declarations
+template <bool, typename> class GenericArray;
+template <bool, typename> class GenericObject;
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericValue
+
+//! Represents a JSON value. Use Value for UTF8 encoding and default allocator.
+/*!
+    A JSON value can be one of 7 types. This class is a variant type supporting
+    these types.
+
+    Use the Value if UTF8 and default allocator
+
+    \tparam Encoding    Encoding of the value. (Even non-string values need to have the same encoding in a document)
+    \tparam Allocator   Allocator type for allocating memory of object, array and string.
+*/
+template <typename Encoding, typename Allocator = MemoryPoolAllocator<> > 
+class GenericValue {
+public:
+    //! Name-value pair in an object.
+    typedef GenericMember<Encoding, Allocator> Member;
+    typedef Encoding EncodingType;                  //!< Encoding type from template parameter.
+    typedef Allocator AllocatorType;                //!< Allocator type from template parameter.
+    typedef typename Encoding::Ch Ch;               //!< Character type derived from Encoding.
+    typedef GenericStringRef<Ch> StringRefType;     //!< Reference to a constant string
+    typedef typename GenericMemberIterator<false,Encoding,Allocator>::Iterator MemberIterator;  //!< Member iterator for iterating in object.
+    typedef typename GenericMemberIterator<true,Encoding,Allocator>::Iterator ConstMemberIterator;  //!< Constant member iterator for iterating in object.
+    typedef GenericValue* ValueIterator;            //!< Value iterator for iterating in array.
+    typedef const GenericValue* ConstValueIterator; //!< Constant value iterator for iterating in array.
+    typedef GenericValue<Encoding, Allocator> ValueType;    //!< Value type of itself.
+    typedef GenericArray<false, ValueType> Array;
+    typedef GenericArray<true, ValueType> ConstArray;
+    typedef GenericObject<false, ValueType> Object;
+    typedef GenericObject<true, ValueType> ConstObject;
+
+    //!@name Constructors and destructor.
+    //@{
+
+    //! Default constructor creates a null value.
+    GenericValue() RAPIDJSON_NOEXCEPT : data_() { data_.f.flags = kNullFlag; }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    //! Move constructor in C++11
+    GenericValue(GenericValue&& rhs) RAPIDJSON_NOEXCEPT : data_(rhs.data_) {
+        rhs.data_.f.flags = kNullFlag; // give up contents
+    }
+#endif
+
+private:
+    //! Copy constructor is not permitted.
+    GenericValue(const GenericValue& rhs);
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    //! Moving from a GenericDocument is not permitted.
+    template <typename StackAllocator>
+    GenericValue(GenericDocument<Encoding,Allocator,StackAllocator>&& rhs);
+
+    //! Move assignment from a GenericDocument is not permitted.
+    template <typename StackAllocator>
+    GenericValue& operator=(GenericDocument<Encoding,Allocator,StackAllocator>&& rhs);
+#endif
+
+public:
+
+    //! Constructor with JSON value type.
+    /*! This creates a Value of specified type with default content.
+        \param type Type of the value.
+        \note Default content for number is zero.
+    */
+    explicit GenericValue(Type type) RAPIDJSON_NOEXCEPT : data_() {
+        static const uint16_t defaultFlags[7] = {
+            kNullFlag, kFalseFlag, kTrueFlag, kObjectFlag, kArrayFlag, kShortStringFlag,
+            kNumberAnyFlag
+        };
+        RAPIDJSON_ASSERT(type >= kNullType && type <= kNumberType);
+        data_.f.flags = defaultFlags[type];
+
+        // Use ShortString to store empty string.
+        if (type == kStringType)
+            data_.ss.SetLength(0);
+    }
+
+    //! Explicit copy constructor (with allocator)
+    /*! Creates a copy of a Value by using the given Allocator
+        \tparam SourceAllocator allocator of \c rhs
+        \param rhs Value to copy from (read-only)
+        \param allocator Allocator for allocating copied elements and buffers. Commonly use GenericDocument::GetAllocator().
+        \param copyConstStrings Force copying of constant strings (e.g. referencing an in-situ buffer)
+        \see CopyFrom()
+    */
+    template <typename SourceAllocator>
+    GenericValue(const GenericValue<Encoding,SourceAllocator>& rhs, Allocator& allocator, bool copyConstStrings = false) {
+        switch (rhs.GetType()) {
+        case kObjectType: {
+                SizeType count = rhs.data_.o.size;
+                Member* lm = reinterpret_cast<Member*>(allocator.Malloc(count * sizeof(Member)));
+                const typename GenericValue<Encoding,SourceAllocator>::Member* rm = rhs.GetMembersPointer();
+                for (SizeType i = 0; i < count; i++) {
+                    new (&lm[i].name) GenericValue(rm[i].name, allocator, copyConstStrings);
+                    new (&lm[i].value) GenericValue(rm[i].value, allocator, copyConstStrings);
+                }
+                data_.f.flags = kObjectFlag;
+                data_.o.size = data_.o.capacity = count;
+                SetMembersPointer(lm);
+            }
+            break;
+        case kArrayType: {
+                SizeType count = rhs.data_.a.size;
+                GenericValue* le = reinterpret_cast<GenericValue*>(allocator.Malloc(count * sizeof(GenericValue)));
+                const GenericValue<Encoding,SourceAllocator>* re = rhs.GetElementsPointer();
+                for (SizeType i = 0; i < count; i++)
+                    new (&le[i]) GenericValue(re[i], allocator, copyConstStrings);
+                data_.f.flags = kArrayFlag;
+                data_.a.size = data_.a.capacity = count;
+                SetElementsPointer(le);
+            }
+            break;
+        case kStringType:
+            if (rhs.data_.f.flags == kConstStringFlag && !copyConstStrings) {
+                data_.f.flags = rhs.data_.f.flags;
+                data_  = *reinterpret_cast<const Data*>(&rhs.data_);
+            }
+            else
+                SetStringRaw(StringRef(rhs.GetString(), rhs.GetStringLength()), allocator);
+            break;
+        default:
+            data_.f.flags = rhs.data_.f.flags;
+            data_  = *reinterpret_cast<const Data*>(&rhs.data_);
+            break;
+        }
+    }
+
+    //! Constructor for boolean value.
+    /*! \param b Boolean value
+        \note This constructor is limited to \em real boolean values and rejects
+            implicitly converted types like arbitrary pointers.  Use an explicit cast
+            to \c bool, if you want to construct a boolean JSON value in such cases.
+     */
+#ifndef RAPIDJSON_DOXYGEN_RUNNING // hide SFINAE from Doxygen
+    template <typename T>
+    explicit GenericValue(T b, RAPIDJSON_ENABLEIF((internal::IsSame<bool, T>))) RAPIDJSON_NOEXCEPT  // See #472
+#else
+    explicit GenericValue(bool b) RAPIDJSON_NOEXCEPT
+#endif
+        : data_() {
+            // safe-guard against failing SFINAE
+            RAPIDJSON_STATIC_ASSERT((internal::IsSame<bool,T>::Value));
+            data_.f.flags = b ? kTrueFlag : kFalseFlag;
+    }
+
+    //! Constructor for int value.
+    explicit GenericValue(int i) RAPIDJSON_NOEXCEPT : data_() {
+        data_.n.i64 = i;
+        data_.f.flags = (i >= 0) ? (kNumberIntFlag | kUintFlag | kUint64Flag) : kNumberIntFlag;
+    }
+
+    //! Constructor for unsigned value.
+    explicit GenericValue(unsigned u) RAPIDJSON_NOEXCEPT : data_() {
+        data_.n.u64 = u; 
+        data_.f.flags = (u & 0x80000000) ? kNumberUintFlag : (kNumberUintFlag | kIntFlag | kInt64Flag);
+    }
+
+    //! Constructor for int64_t value.
+    explicit GenericValue(int64_t i64) RAPIDJSON_NOEXCEPT : data_() {
+        data_.n.i64 = i64;
+        data_.f.flags = kNumberInt64Flag;
+        if (i64 >= 0) {
+            data_.f.flags |= kNumberUint64Flag;
+            if (!(static_cast<uint64_t>(i64) & RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0x00000000)))
+                data_.f.flags |= kUintFlag;
+            if (!(static_cast<uint64_t>(i64) & RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0x80000000)))
+                data_.f.flags |= kIntFlag;
+        }
+        else if (i64 >= static_cast<int64_t>(RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0x80000000)))
+            data_.f.flags |= kIntFlag;
+    }
+
+    //! Constructor for uint64_t value.
+    explicit GenericValue(uint64_t u64) RAPIDJSON_NOEXCEPT : data_() {
+        data_.n.u64 = u64;
+        data_.f.flags = kNumberUint64Flag;
+        if (!(u64 & RAPIDJSON_UINT64_C2(0x80000000, 0x00000000)))
+            data_.f.flags |= kInt64Flag;
+        if (!(u64 & RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0x00000000)))
+            data_.f.flags |= kUintFlag;
+        if (!(u64 & RAPIDJSON_UINT64_C2(0xFFFFFFFF, 0x80000000)))
+            data_.f.flags |= kIntFlag;
+    }
+
+    //! Constructor for double value.
+    explicit GenericValue(double d) RAPIDJSON_NOEXCEPT : data_() { data_.n.d = d; data_.f.flags = kNumberDoubleFlag; }
+
+    //! Constructor for float value.
+    explicit GenericValue(float f) RAPIDJSON_NOEXCEPT : data_() { data_.n.d = static_cast<double>(f); data_.f.flags = kNumberDoubleFlag; }
+
+    //! Constructor for constant string (i.e. do not make a copy of string)
+    GenericValue(const Ch* s, SizeType length) RAPIDJSON_NOEXCEPT : data_() { SetStringRaw(StringRef(s, length)); }
+
+    //! Constructor for constant string (i.e. do not make a copy of string)
+    explicit GenericValue(StringRefType s) RAPIDJSON_NOEXCEPT : data_() { SetStringRaw(s); }
+
+    //! Constructor for copy-string (i.e. do make a copy of string)
+    GenericValue(const Ch* s, SizeType length, Allocator& allocator) : data_() { SetStringRaw(StringRef(s, length), allocator); }
+
+    //! Constructor for copy-string (i.e. do make a copy of string)
+    GenericValue(const Ch*s, Allocator& allocator) : data_() { SetStringRaw(StringRef(s), allocator); }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Constructor for copy-string from a string object (i.e. do make a copy of string)
+    /*! \note Requires the definition of the preprocessor symbol \ref RAPIDJSON_HAS_STDSTRING.
+     */
+    GenericValue(const std::basic_string<Ch>& s, Allocator& allocator) : data_() { SetStringRaw(StringRef(s), allocator); }
+#endif
+
+    //! Constructor for Array.
+    /*!
+        \param a An array obtained by \c GetArray().
+        \note \c Array is always pass-by-value.
+        \note the source array is moved into this value and the sourec array becomes empty.
+    */
+    GenericValue(Array a) RAPIDJSON_NOEXCEPT : data_(a.value_.data_) {
+        a.value_.data_ = Data();
+        a.value_.data_.f.flags = kArrayFlag;
+    }
+
+    //! Constructor for Object.
+    /*!
+        \param o An object obtained by \c GetObject().
+        \note \c Object is always pass-by-value.
+        \note the source object is moved into this value and the sourec object becomes empty.
+    */
+    GenericValue(Object o) RAPIDJSON_NOEXCEPT : data_(o.value_.data_) {
+        o.value_.data_ = Data();
+        o.value_.data_.f.flags = kObjectFlag;
+    }
+
+    //! Destructor.
+    /*! Need to destruct elements of array, members of object, or copy-string.
+    */
+    ~GenericValue() {
+        if (Allocator::kNeedFree) { // Shortcut by Allocator's trait
+            switch(data_.f.flags) {
+            case kArrayFlag:
+                {
+                    GenericValue* e = GetElementsPointer();
+                    for (GenericValue* v = e; v != e + data_.a.size; ++v)
+                        v->~GenericValue();
+                    Allocator::Free(e);
+                }
+                break;
+
+            case kObjectFlag:
+                for (MemberIterator m = MemberBegin(); m != MemberEnd(); ++m)
+                    m->~Member();
+                Allocator::Free(GetMembersPointer());
+                break;
+
+            case kCopyStringFlag:
+                Allocator::Free(const_cast<Ch*>(GetStringPointer()));
+                break;
+
+            default:
+                break;  // Do nothing for other types.
+            }
+        }
+    }
+
+    //@}
+
+    //!@name Assignment operators
+    //@{
+
+    //! Assignment with move semantics.
+    /*! \param rhs Source of the assignment. It will become a null value after assignment.
+    */
+    GenericValue& operator=(GenericValue& rhs) RAPIDJSON_NOEXCEPT {
+        RAPIDJSON_ASSERT(this != &rhs);
+        this->~GenericValue();
+        RawAssign(rhs);
+        return *this;
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    //! Move assignment in C++11
+    GenericValue& operator=(GenericValue&& rhs) RAPIDJSON_NOEXCEPT {
+        return *this = rhs.Move();
+    }
+#endif
+
+    //! Assignment of constant string reference (no copy)
+    /*! \param str Constant string reference to be assigned
+        \note This overload is needed to avoid clashes with the generic primitive type assignment overload below.
+        \see GenericStringRef, operator=(T)
+    */
+    GenericValue& operator=(StringRefType str) RAPIDJSON_NOEXCEPT {
+        GenericValue s(str);
+        return *this = s;
+    }
+
+    //! Assignment with primitive types.
+    /*! \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t
+        \param value The value to be assigned.
+
+        \note The source type \c T explicitly disallows all pointer types,
+            especially (\c const) \ref Ch*.  This helps avoiding implicitly
+            referencing character strings with insufficient lifetime, use
+            \ref SetString(const Ch*, Allocator&) (for copying) or
+            \ref StringRef() (to explicitly mark the pointer as constant) instead.
+            All other pointer types would implicitly convert to \c bool,
+            use \ref SetBool() instead.
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::IsPointer<T>), (GenericValue&))
+    operator=(T value) {
+        GenericValue v(value);
+        return *this = v;
+    }
+
+    //! Deep-copy assignment from Value
+    /*! Assigns a \b copy of the Value to the current Value object
+        \tparam SourceAllocator Allocator type of \c rhs
+        \param rhs Value to copy from (read-only)
+        \param allocator Allocator to use for copying
+        \param copyConstStrings Force copying of constant strings (e.g. referencing an in-situ buffer)
+     */
+    template <typename SourceAllocator>
+    GenericValue& CopyFrom(const GenericValue<Encoding, SourceAllocator>& rhs, Allocator& allocator, bool copyConstStrings = false) {
+        RAPIDJSON_ASSERT(static_cast<void*>(this) != static_cast<void const*>(&rhs));
+        this->~GenericValue();
+        new (this) GenericValue(rhs, allocator, copyConstStrings);
+        return *this;
+    }
+
+    //! Exchange the contents of this value with those of other.
+    /*!
+        \param other Another value.
+        \note Constant complexity.
+    */
+    GenericValue& Swap(GenericValue& other) RAPIDJSON_NOEXCEPT {
+        GenericValue temp;
+        temp.RawAssign(*this);
+        RawAssign(other);
+        other.RawAssign(temp);
+        return *this;
+    }
+
+    //! free-standing swap function helper
+    /*!
+        Helper function to enable support for common swap implementation pattern based on \c std::swap:
+        \code
+        void swap(MyClass& a, MyClass& b) {
+            using std::swap;
+            swap(a.value, b.value);
+            // ...
+        }
+        \endcode
+        \see Swap()
+     */
+    friend inline void swap(GenericValue& a, GenericValue& b) RAPIDJSON_NOEXCEPT { a.Swap(b); }
+
+    //! Prepare Value for move semantics
+    /*! \return *this */
+    GenericValue& Move() RAPIDJSON_NOEXCEPT { return *this; }
+    //@}
+
+    //!@name Equal-to and not-equal-to operators
+    //@{
+    //! Equal-to operator
+    /*!
+        \note If an object contains duplicated named member, comparing equality with any object is always \c false.
+        \note Linear time complexity (number of all values in the subtree and total lengths of all strings).
+    */
+    template <typename SourceAllocator>
+    bool operator==(const GenericValue<Encoding, SourceAllocator>& rhs) const {
+        typedef GenericValue<Encoding, SourceAllocator> RhsType;
+        if (GetType() != rhs.GetType())
+            return false;
+
+        switch (GetType()) {
+        case kObjectType: // Warning: O(n^2) inner-loop
+            if (data_.o.size != rhs.data_.o.size)
+                return false;           
+            for (ConstMemberIterator lhsMemberItr = MemberBegin(); lhsMemberItr != MemberEnd(); ++lhsMemberItr) {
+                typename RhsType::ConstMemberIterator rhsMemberItr = rhs.FindMember(lhsMemberItr->name);
+                if (rhsMemberItr == rhs.MemberEnd() || lhsMemberItr->value != rhsMemberItr->value)
+                    return false;
+            }
+            return true;
+            
+        case kArrayType:
+            if (data_.a.size != rhs.data_.a.size)
+                return false;
+            for (SizeType i = 0; i < data_.a.size; i++)
+                if ((*this)[i] != rhs[i])
+                    return false;
+            return true;
+
+        case kStringType:
+            return StringEqual(rhs);
+
+        case kNumberType:
+            if (IsDouble() || rhs.IsDouble()) {
+                double a = GetDouble();     // May convert from integer to double.
+                double b = rhs.GetDouble(); // Ditto
+                return a >= b && a <= b;    // Prevent -Wfloat-equal
+            }
+            else
+                return data_.n.u64 == rhs.data_.n.u64;
+
+        default:
+            return true;
+        }
+    }
+
+    //! Equal-to operator with const C-string pointer
+    bool operator==(const Ch* rhs) const { return *this == GenericValue(StringRef(rhs)); }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Equal-to operator with string object
+    /*! \note Requires the definition of the preprocessor symbol \ref RAPIDJSON_HAS_STDSTRING.
+     */
+    bool operator==(const std::basic_string<Ch>& rhs) const { return *this == GenericValue(StringRef(rhs)); }
+#endif
+
+    //! Equal-to operator with primitive types
+    /*! \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t, \c double, \c true, \c false
+    */
+    template <typename T> RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>,internal::IsGenericValue<T> >), (bool)) operator==(const T& rhs) const { return *this == GenericValue(rhs); }
+
+    //! Not-equal-to operator
+    /*! \return !(*this == rhs)
+     */
+    template <typename SourceAllocator>
+    bool operator!=(const GenericValue<Encoding, SourceAllocator>& rhs) const { return !(*this == rhs); }
+
+    //! Not-equal-to operator with const C-string pointer
+    bool operator!=(const Ch* rhs) const { return !(*this == rhs); }
+
+    //! Not-equal-to operator with arbitrary types
+    /*! \return !(*this == rhs)
+     */
+    template <typename T> RAPIDJSON_DISABLEIF_RETURN((internal::IsGenericValue<T>), (bool)) operator!=(const T& rhs) const { return !(*this == rhs); }
+
+    //! Equal-to operator with arbitrary types (symmetric version)
+    /*! \return (rhs == lhs)
+     */
+    template <typename T> friend RAPIDJSON_DISABLEIF_RETURN((internal::IsGenericValue<T>), (bool)) operator==(const T& lhs, const GenericValue& rhs) { return rhs == lhs; }
+
+    //! Not-Equal-to operator with arbitrary types (symmetric version)
+    /*! \return !(rhs == lhs)
+     */
+    template <typename T> friend RAPIDJSON_DISABLEIF_RETURN((internal::IsGenericValue<T>), (bool)) operator!=(const T& lhs, const GenericValue& rhs) { return !(rhs == lhs); }
+    //@}
+
+    //!@name Type
+    //@{
+
+    Type GetType()  const { return static_cast<Type>(data_.f.flags & kTypeMask); }
+    bool IsNull()   const { return data_.f.flags == kNullFlag; }
+    bool IsFalse()  const { return data_.f.flags == kFalseFlag; }
+    bool IsTrue()   const { return data_.f.flags == kTrueFlag; }
+    bool IsBool()   const { return (data_.f.flags & kBoolFlag) != 0; }
+    bool IsObject() const { return data_.f.flags == kObjectFlag; }
+    bool IsArray()  const { return data_.f.flags == kArrayFlag; }
+    bool IsNumber() const { return (data_.f.flags & kNumberFlag) != 0; }
+    bool IsInt()    const { return (data_.f.flags & kIntFlag) != 0; }
+    bool IsUint()   const { return (data_.f.flags & kUintFlag) != 0; }
+    bool IsInt64()  const { return (data_.f.flags & kInt64Flag) != 0; }
+    bool IsUint64() const { return (data_.f.flags & kUint64Flag) != 0; }
+    bool IsDouble() const { return (data_.f.flags & kDoubleFlag) != 0; }
+    bool IsString() const { return (data_.f.flags & kStringFlag) != 0; }
+
+    // Checks whether a number can be losslessly converted to a double.
+    bool IsLosslessDouble() const {
+        if (!IsNumber()) return false;
+        if (IsUint64()) {
+            uint64_t u = GetUint64();
+            volatile double d = static_cast<double>(u);
+            return (d >= 0.0)
+                && (d < static_cast<double>((std::numeric_limits<uint64_t>::max)()))
+                && (u == static_cast<uint64_t>(d));
+        }
+        if (IsInt64()) {
+            int64_t i = GetInt64();
+            volatile double d = static_cast<double>(i);
+            return (d >= static_cast<double>((std::numeric_limits<int64_t>::min)()))
+                && (d < static_cast<double>((std::numeric_limits<int64_t>::max)()))
+                && (i == static_cast<int64_t>(d));
+        }
+        return true; // double, int, uint are always lossless
+    }
+
+    // Checks whether a number is a float (possible lossy).
+    bool IsFloat() const  {
+        if ((data_.f.flags & kDoubleFlag) == 0)
+            return false;
+        double d = GetDouble();
+        return d >= -3.4028234e38 && d <= 3.4028234e38;
+    }
+    // Checks whether a number can be losslessly converted to a float.
+    bool IsLosslessFloat() const {
+        if (!IsNumber()) return false;
+        double a = GetDouble();
+        if (a < static_cast<double>(-(std::numeric_limits<float>::max)())
+                || a > static_cast<double>((std::numeric_limits<float>::max)()))
+            return false;
+        double b = static_cast<double>(static_cast<float>(a));
+        return a >= b && a <= b;    // Prevent -Wfloat-equal
+    }
+
+    //@}
+
+    //!@name Null
+    //@{
+
+    GenericValue& SetNull() { this->~GenericValue(); new (this) GenericValue(); return *this; }
+
+    //@}
+
+    //!@name Bool
+    //@{
+
+    bool GetBool() const { RAPIDJSON_ASSERT(IsBool()); return data_.f.flags == kTrueFlag; }
+    //!< Set boolean value
+    /*! \post IsBool() == true */
+    GenericValue& SetBool(bool b) { this->~GenericValue(); new (this) GenericValue(b); return *this; }
+
+    //@}
+
+    //!@name Object
+    //@{
+
+    //! Set this value as an empty object.
+    /*! \post IsObject() == true */
+    GenericValue& SetObject() { this->~GenericValue(); new (this) GenericValue(kObjectType); return *this; }
+
+    //! Get the number of members in the object.
+    SizeType MemberCount() const { RAPIDJSON_ASSERT(IsObject()); return data_.o.size; }
+
+    //! Get the capacity of object.
+    SizeType MemberCapacity() const { RAPIDJSON_ASSERT(IsObject()); return data_.o.capacity; }
+
+    //! Check whether the object is empty.
+    bool ObjectEmpty() const { RAPIDJSON_ASSERT(IsObject()); return data_.o.size == 0; }
+
+    //! Get a value from an object associated with the name.
+    /*! \pre IsObject() == true
+        \tparam T Either \c Ch or \c const \c Ch (template used for disambiguation with \ref operator[](SizeType))
+        \note In version 0.1x, if the member is not found, this function returns a null value. This makes issue 7.
+        Since 0.2, if the name is not correct, it will assert.
+        If user is unsure whether a member exists, user should use HasMember() first.
+        A better approach is to use FindMember().
+        \note Linear time complexity.
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::NotExpr<internal::IsSame<typename internal::RemoveConst<T>::Type, Ch> >),(GenericValue&)) operator[](T* name) {
+        GenericValue n(StringRef(name));
+        return (*this)[n];
+    }
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::NotExpr<internal::IsSame<typename internal::RemoveConst<T>::Type, Ch> >),(const GenericValue&)) operator[](T* name) const { return const_cast<GenericValue&>(*this)[name]; }
+
+    //! Get a value from an object associated with the name.
+    /*! \pre IsObject() == true
+        \tparam SourceAllocator Allocator of the \c name value
+
+        \note Compared to \ref operator[](T*), this version is faster because it does not need a StrLen().
+        And it can also handle strings with embedded null characters.
+
+        \note Linear time complexity.
+    */
+    template <typename SourceAllocator>
+    GenericValue& operator[](const GenericValue<Encoding, SourceAllocator>& name) {
+        MemberIterator member = FindMember(name);
+        if (member != MemberEnd())
+            return member->value;
+        else {
+            RAPIDJSON_ASSERT(false);    // see above note
+
+            // This will generate -Wexit-time-destructors in clang
+            // static GenericValue NullValue;
+            // return NullValue;
+
+            // Use static buffer and placement-new to prevent destruction
+            static char buffer[sizeof(GenericValue)];
+            return *new (buffer) GenericValue();
+        }
+    }
+    template <typename SourceAllocator>
+    const GenericValue& operator[](const GenericValue<Encoding, SourceAllocator>& name) const { return const_cast<GenericValue&>(*this)[name]; }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Get a value from an object associated with name (string object).
+    GenericValue& operator[](const std::basic_string<Ch>& name) { return (*this)[GenericValue(StringRef(name))]; }
+    const GenericValue& operator[](const std::basic_string<Ch>& name) const { return (*this)[GenericValue(StringRef(name))]; }
+#endif
+
+    //! Const member iterator
+    /*! \pre IsObject() == true */
+    ConstMemberIterator MemberBegin() const { RAPIDJSON_ASSERT(IsObject()); return ConstMemberIterator(GetMembersPointer()); }
+    //! Const \em past-the-end member iterator
+    /*! \pre IsObject() == true */
+    ConstMemberIterator MemberEnd() const   { RAPIDJSON_ASSERT(IsObject()); return ConstMemberIterator(GetMembersPointer() + data_.o.size); }
+    //! Member iterator
+    /*! \pre IsObject() == true */
+    MemberIterator MemberBegin()            { RAPIDJSON_ASSERT(IsObject()); return MemberIterator(GetMembersPointer()); }
+    //! \em Past-the-end member iterator
+    /*! \pre IsObject() == true */
+    MemberIterator MemberEnd()              { RAPIDJSON_ASSERT(IsObject()); return MemberIterator(GetMembersPointer() + data_.o.size); }
+
+    //! Request the object to have enough capacity to store members.
+    /*! \param newCapacity  The capacity that the object at least need to have.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \note Linear time complexity.
+    */
+    GenericValue& MemberReserve(SizeType newCapacity, Allocator &allocator) {
+        RAPIDJSON_ASSERT(IsObject());
+        if (newCapacity > data_.o.capacity) {
+            SetMembersPointer(reinterpret_cast<Member*>(allocator.Realloc(GetMembersPointer(), data_.o.capacity * sizeof(Member), newCapacity * sizeof(Member))));
+            data_.o.capacity = newCapacity;
+        }
+        return *this;
+    }
+
+    //! Check whether a member exists in the object.
+    /*!
+        \param name Member name to be searched.
+        \pre IsObject() == true
+        \return Whether a member with that name exists.
+        \note It is better to use FindMember() directly if you need the obtain the value as well.
+        \note Linear time complexity.
+    */
+    bool HasMember(const Ch* name) const { return FindMember(name) != MemberEnd(); }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Check whether a member exists in the object with string object.
+    /*!
+        \param name Member name to be searched.
+        \pre IsObject() == true
+        \return Whether a member with that name exists.
+        \note It is better to use FindMember() directly if you need the obtain the value as well.
+        \note Linear time complexity.
+    */
+    bool HasMember(const std::basic_string<Ch>& name) const { return FindMember(name) != MemberEnd(); }
+#endif
+
+    //! Check whether a member exists in the object with GenericValue name.
+    /*!
+        This version is faster because it does not need a StrLen(). It can also handle string with null character.
+        \param name Member name to be searched.
+        \pre IsObject() == true
+        \return Whether a member with that name exists.
+        \note It is better to use FindMember() directly if you need the obtain the value as well.
+        \note Linear time complexity.
+    */
+    template <typename SourceAllocator>
+    bool HasMember(const GenericValue<Encoding, SourceAllocator>& name) const { return FindMember(name) != MemberEnd(); }
+
+    //! Find member by name.
+    /*!
+        \param name Member name to be searched.
+        \pre IsObject() == true
+        \return Iterator to member, if it exists.
+            Otherwise returns \ref MemberEnd().
+
+        \note Earlier versions of Rapidjson returned a \c NULL pointer, in case
+            the requested member doesn't exist. For consistency with e.g.
+            \c std::map, this has been changed to MemberEnd() now.
+        \note Linear time complexity.
+    */
+    MemberIterator FindMember(const Ch* name) {
+        GenericValue n(StringRef(name));
+        return FindMember(n);
+    }
+
+    ConstMemberIterator FindMember(const Ch* name) const { return const_cast<GenericValue&>(*this).FindMember(name); }
+
+    //! Find member by name.
+    /*!
+        This version is faster because it does not need a StrLen(). It can also handle string with null character.
+        \param name Member name to be searched.
+        \pre IsObject() == true
+        \return Iterator to member, if it exists.
+            Otherwise returns \ref MemberEnd().
+
+        \note Earlier versions of Rapidjson returned a \c NULL pointer, in case
+            the requested member doesn't exist. For consistency with e.g.
+            \c std::map, this has been changed to MemberEnd() now.
+        \note Linear time complexity.
+    */
+    template <typename SourceAllocator>
+    MemberIterator FindMember(const GenericValue<Encoding, SourceAllocator>& name) {
+        RAPIDJSON_ASSERT(IsObject());
+        RAPIDJSON_ASSERT(name.IsString());
+        MemberIterator member = MemberBegin();
+        for ( ; member != MemberEnd(); ++member)
+            if (name.StringEqual(member->name))
+                break;
+        return member;
+    }
+    template <typename SourceAllocator> ConstMemberIterator FindMember(const GenericValue<Encoding, SourceAllocator>& name) const { return const_cast<GenericValue&>(*this).FindMember(name); }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Find member by string object name.
+    /*!
+        \param name Member name to be searched.
+        \pre IsObject() == true
+        \return Iterator to member, if it exists.
+            Otherwise returns \ref MemberEnd().
+    */
+    MemberIterator FindMember(const std::basic_string<Ch>& name) { return FindMember(GenericValue(StringRef(name))); }
+    ConstMemberIterator FindMember(const std::basic_string<Ch>& name) const { return FindMember(GenericValue(StringRef(name))); }
+#endif
+
+    //! Add a member (name-value pair) to the object.
+    /*! \param name A string value as name of member.
+        \param value Value of any type.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \note The ownership of \c name and \c value will be transferred to this object on success.
+        \pre  IsObject() && name.IsString()
+        \post name.IsNull() && value.IsNull()
+        \note Amortized Constant time complexity.
+    */
+    GenericValue& AddMember(GenericValue& name, GenericValue& value, Allocator& allocator) {
+        RAPIDJSON_ASSERT(IsObject());
+        RAPIDJSON_ASSERT(name.IsString());
+
+        ObjectData& o = data_.o;
+        if (o.size >= o.capacity)
+            MemberReserve(o.capacity == 0 ? kDefaultObjectCapacity : (o.capacity + (o.capacity + 1) / 2), allocator);
+        Member* members = GetMembersPointer();
+        members[o.size].name.RawAssign(name);
+        members[o.size].value.RawAssign(value);
+        o.size++;
+        return *this;
+    }
+
+    //! Add a constant string value as member (name-value pair) to the object.
+    /*! \param name A string value as name of member.
+        \param value constant string reference as value of member.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \pre  IsObject()
+        \note This overload is needed to avoid clashes with the generic primitive type AddMember(GenericValue&,T,Allocator&) overload below.
+        \note Amortized Constant time complexity.
+    */
+    GenericValue& AddMember(GenericValue& name, StringRefType value, Allocator& allocator) {
+        GenericValue v(value);
+        return AddMember(name, v, allocator);
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Add a string object as member (name-value pair) to the object.
+    /*! \param name A string value as name of member.
+        \param value constant string reference as value of member.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \pre  IsObject()
+        \note This overload is needed to avoid clashes with the generic primitive type AddMember(GenericValue&,T,Allocator&) overload below.
+        \note Amortized Constant time complexity.
+    */
+    GenericValue& AddMember(GenericValue& name, std::basic_string<Ch>& value, Allocator& allocator) {
+        GenericValue v(value, allocator);
+        return AddMember(name, v, allocator);
+    }
+#endif
+
+    //! Add any primitive value as member (name-value pair) to the object.
+    /*! \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t
+        \param name A string value as name of member.
+        \param value Value of primitive type \c T as value of member
+        \param allocator Allocator for reallocating memory. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \pre  IsObject()
+
+        \note The source type \c T explicitly disallows all pointer types,
+            especially (\c const) \ref Ch*.  This helps avoiding implicitly
+            referencing character strings with insufficient lifetime, use
+            \ref AddMember(StringRefType, GenericValue&, Allocator&) or \ref
+            AddMember(StringRefType, StringRefType, Allocator&).
+            All other pointer types would implicitly convert to \c bool,
+            use an explicit cast instead, if needed.
+        \note Amortized Constant time complexity.
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (GenericValue&))
+    AddMember(GenericValue& name, T value, Allocator& allocator) {
+        GenericValue v(value);
+        return AddMember(name, v, allocator);
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericValue& AddMember(GenericValue&& name, GenericValue&& value, Allocator& allocator) {
+        return AddMember(name, value, allocator);
+    }
+    GenericValue& AddMember(GenericValue&& name, GenericValue& value, Allocator& allocator) {
+        return AddMember(name, value, allocator);
+    }
+    GenericValue& AddMember(GenericValue& name, GenericValue&& value, Allocator& allocator) {
+        return AddMember(name, value, allocator);
+    }
+    GenericValue& AddMember(StringRefType name, GenericValue&& value, Allocator& allocator) {
+        GenericValue n(name);
+        return AddMember(n, value, allocator);
+    }
+#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS
+
+
+    //! Add a member (name-value pair) to the object.
+    /*! \param name A constant string reference as name of member.
+        \param value Value of any type.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \note The ownership of \c value will be transferred to this object on success.
+        \pre  IsObject()
+        \post value.IsNull()
+        \note Amortized Constant time complexity.
+    */
+    GenericValue& AddMember(StringRefType name, GenericValue& value, Allocator& allocator) {
+        GenericValue n(name);
+        return AddMember(n, value, allocator);
+    }
+
+    //! Add a constant string value as member (name-value pair) to the object.
+    /*! \param name A constant string reference as name of member.
+        \param value constant string reference as value of member.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \pre  IsObject()
+        \note This overload is needed to avoid clashes with the generic primitive type AddMember(StringRefType,T,Allocator&) overload below.
+        \note Amortized Constant time complexity.
+    */
+    GenericValue& AddMember(StringRefType name, StringRefType value, Allocator& allocator) {
+        GenericValue v(value);
+        return AddMember(name, v, allocator);
+    }
+
+    //! Add any primitive value as member (name-value pair) to the object.
+    /*! \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t
+        \param name A constant string reference as name of member.
+        \param value Value of primitive type \c T as value of member
+        \param allocator Allocator for reallocating memory. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \pre  IsObject()
+
+        \note The source type \c T explicitly disallows all pointer types,
+            especially (\c const) \ref Ch*.  This helps avoiding implicitly
+            referencing character strings with insufficient lifetime, use
+            \ref AddMember(StringRefType, GenericValue&, Allocator&) or \ref
+            AddMember(StringRefType, StringRefType, Allocator&).
+            All other pointer types would implicitly convert to \c bool,
+            use an explicit cast instead, if needed.
+        \note Amortized Constant time complexity.
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (GenericValue&))
+    AddMember(StringRefType name, T value, Allocator& allocator) {
+        GenericValue n(name);
+        return AddMember(n, value, allocator);
+    }
+
+    //! Remove all members in the object.
+    /*! This function do not deallocate memory in the object, i.e. the capacity is unchanged.
+        \note Linear time complexity.
+    */
+    void RemoveAllMembers() {
+        RAPIDJSON_ASSERT(IsObject()); 
+        for (MemberIterator m = MemberBegin(); m != MemberEnd(); ++m)
+            m->~Member();
+        data_.o.size = 0;
+    }
+
+    //! Remove a member in object by its name.
+    /*! \param name Name of member to be removed.
+        \return Whether the member existed.
+        \note This function may reorder the object members. Use \ref
+            EraseMember(ConstMemberIterator) if you need to preserve the
+            relative order of the remaining members.
+        \note Linear time complexity.
+    */
+    bool RemoveMember(const Ch* name) {
+        GenericValue n(StringRef(name));
+        return RemoveMember(n);
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    bool RemoveMember(const std::basic_string<Ch>& name) { return RemoveMember(GenericValue(StringRef(name))); }
+#endif
+
+    template <typename SourceAllocator>
+    bool RemoveMember(const GenericValue<Encoding, SourceAllocator>& name) {
+        MemberIterator m = FindMember(name);
+        if (m != MemberEnd()) {
+            RemoveMember(m);
+            return true;
+        }
+        else
+            return false;
+    }
+
+    //! Remove a member in object by iterator.
+    /*! \param m member iterator (obtained by FindMember() or MemberBegin()).
+        \return the new iterator after removal.
+        \note This function may reorder the object members. Use \ref
+            EraseMember(ConstMemberIterator) if you need to preserve the
+            relative order of the remaining members.
+        \note Constant time complexity.
+    */
+    MemberIterator RemoveMember(MemberIterator m) {
+        RAPIDJSON_ASSERT(IsObject());
+        RAPIDJSON_ASSERT(data_.o.size > 0);
+        RAPIDJSON_ASSERT(GetMembersPointer() != 0);
+        RAPIDJSON_ASSERT(m >= MemberBegin() && m < MemberEnd());
+
+        MemberIterator last(GetMembersPointer() + (data_.o.size - 1));
+        if (data_.o.size > 1 && m != last)
+            *m = *last; // Move the last one to this place
+        else
+            m->~Member(); // Only one left, just destroy
+        --data_.o.size;
+        return m;
+    }
+
+    //! Remove a member from an object by iterator.
+    /*! \param pos iterator to the member to remove
+        \pre IsObject() == true && \ref MemberBegin() <= \c pos < \ref MemberEnd()
+        \return Iterator following the removed element.
+            If the iterator \c pos refers to the last element, the \ref MemberEnd() iterator is returned.
+        \note This function preserves the relative order of the remaining object
+            members. If you do not need this, use the more efficient \ref RemoveMember(MemberIterator).
+        \note Linear time complexity.
+    */
+    MemberIterator EraseMember(ConstMemberIterator pos) {
+        return EraseMember(pos, pos +1);
+    }
+
+    //! Remove members in the range [first, last) from an object.
+    /*! \param first iterator to the first member to remove
+        \param last  iterator following the last member to remove
+        \pre IsObject() == true && \ref MemberBegin() <= \c first <= \c last <= \ref MemberEnd()
+        \return Iterator following the last removed element.
+        \note This function preserves the relative order of the remaining object
+            members.
+        \note Linear time complexity.
+    */
+    MemberIterator EraseMember(ConstMemberIterator first, ConstMemberIterator last) {
+        RAPIDJSON_ASSERT(IsObject());
+        RAPIDJSON_ASSERT(data_.o.size > 0);
+        RAPIDJSON_ASSERT(GetMembersPointer() != 0);
+        RAPIDJSON_ASSERT(first >= MemberBegin());
+        RAPIDJSON_ASSERT(first <= last);
+        RAPIDJSON_ASSERT(last <= MemberEnd());
+
+        MemberIterator pos = MemberBegin() + (first - MemberBegin());
+        for (MemberIterator itr = pos; itr != last; ++itr)
+            itr->~Member();
+        std::memmove(&*pos, &*last, static_cast<size_t>(MemberEnd() - last) * sizeof(Member));
+        data_.o.size -= static_cast<SizeType>(last - first);
+        return pos;
+    }
+
+    //! Erase a member in object by its name.
+    /*! \param name Name of member to be removed.
+        \return Whether the member existed.
+        \note Linear time complexity.
+    */
+    bool EraseMember(const Ch* name) {
+        GenericValue n(StringRef(name));
+        return EraseMember(n);
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    bool EraseMember(const std::basic_string<Ch>& name) { return EraseMember(GenericValue(StringRef(name))); }
+#endif
+
+    template <typename SourceAllocator>
+    bool EraseMember(const GenericValue<Encoding, SourceAllocator>& name) {
+        MemberIterator m = FindMember(name);
+        if (m != MemberEnd()) {
+            EraseMember(m);
+            return true;
+        }
+        else
+            return false;
+    }
+
+    Object GetObject() { RAPIDJSON_ASSERT(IsObject()); return Object(*this); }
+    ConstObject GetObject() const { RAPIDJSON_ASSERT(IsObject()); return ConstObject(*this); }
+
+    //@}
+
+    //!@name Array
+    //@{
+
+    //! Set this value as an empty array.
+    /*! \post IsArray == true */
+    GenericValue& SetArray() { this->~GenericValue(); new (this) GenericValue(kArrayType); return *this; }
+
+    //! Get the number of elements in array.
+    SizeType Size() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.size; }
+
+    //! Get the capacity of array.
+    SizeType Capacity() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.capacity; }
+
+    //! Check whether the array is empty.
+    bool Empty() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.size == 0; }
+
+    //! Remove all elements in the array.
+    /*! This function do not deallocate memory in the array, i.e. the capacity is unchanged.
+        \note Linear time complexity.
+    */
+    void Clear() {
+        RAPIDJSON_ASSERT(IsArray()); 
+        GenericValue* e = GetElementsPointer();
+        for (GenericValue* v = e; v != e + data_.a.size; ++v)
+            v->~GenericValue();
+        data_.a.size = 0;
+    }
+
+    //! Get an element from array by index.
+    /*! \pre IsArray() == true
+        \param index Zero-based index of element.
+        \see operator[](T*)
+    */
+    GenericValue& operator[](SizeType index) {
+        RAPIDJSON_ASSERT(IsArray());
+        RAPIDJSON_ASSERT(index < data_.a.size);
+        return GetElementsPointer()[index];
+    }
+    const GenericValue& operator[](SizeType index) const { return const_cast<GenericValue&>(*this)[index]; }
+
+    //! Element iterator
+    /*! \pre IsArray() == true */
+    ValueIterator Begin() { RAPIDJSON_ASSERT(IsArray()); return GetElementsPointer(); }
+    //! \em Past-the-end element iterator
+    /*! \pre IsArray() == true */
+    ValueIterator End() { RAPIDJSON_ASSERT(IsArray()); return GetElementsPointer() + data_.a.size; }
+    //! Constant element iterator
+    /*! \pre IsArray() == true */
+    ConstValueIterator Begin() const { return const_cast<GenericValue&>(*this).Begin(); }
+    //! Constant \em past-the-end element iterator
+    /*! \pre IsArray() == true */
+    ConstValueIterator End() const { return const_cast<GenericValue&>(*this).End(); }
+
+    //! Request the array to have enough capacity to store elements.
+    /*! \param newCapacity  The capacity that the array at least need to have.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \note Linear time complexity.
+    */
+    GenericValue& Reserve(SizeType newCapacity, Allocator &allocator) {
+        RAPIDJSON_ASSERT(IsArray());
+        if (newCapacity > data_.a.capacity) {
+            SetElementsPointer(reinterpret_cast<GenericValue*>(allocator.Realloc(GetElementsPointer(), data_.a.capacity * sizeof(GenericValue), newCapacity * sizeof(GenericValue))));
+            data_.a.capacity = newCapacity;
+        }
+        return *this;
+    }
+
+    //! Append a GenericValue at the end of the array.
+    /*! \param value        Value to be appended.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \pre IsArray() == true
+        \post value.IsNull() == true
+        \return The value itself for fluent API.
+        \note The ownership of \c value will be transferred to this array on success.
+        \note If the number of elements to be appended is known, calls Reserve() once first may be more efficient.
+        \note Amortized constant time complexity.
+    */
+    GenericValue& PushBack(GenericValue& value, Allocator& allocator) {
+        RAPIDJSON_ASSERT(IsArray());
+        if (data_.a.size >= data_.a.capacity)
+            Reserve(data_.a.capacity == 0 ? kDefaultArrayCapacity : (data_.a.capacity + (data_.a.capacity + 1) / 2), allocator);
+        GetElementsPointer()[data_.a.size++].RawAssign(value);
+        return *this;
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericValue& PushBack(GenericValue&& value, Allocator& allocator) {
+        return PushBack(value, allocator);
+    }
+#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS
+
+    //! Append a constant string reference at the end of the array.
+    /*! \param value        Constant string reference to be appended.
+        \param allocator    Allocator for reallocating memory. It must be the same one used previously. Commonly use GenericDocument::GetAllocator().
+        \pre IsArray() == true
+        \return The value itself for fluent API.
+        \note If the number of elements to be appended is known, calls Reserve() once first may be more efficient.
+        \note Amortized constant time complexity.
+        \see GenericStringRef
+    */
+    GenericValue& PushBack(StringRefType value, Allocator& allocator) {
+        return (*this).template PushBack<StringRefType>(value, allocator);
+    }
+
+    //! Append a primitive value at the end of the array.
+    /*! \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t
+        \param value Value of primitive type T to be appended.
+        \param allocator    Allocator for reallocating memory. It must be the same one as used before. Commonly use GenericDocument::GetAllocator().
+        \pre IsArray() == true
+        \return The value itself for fluent API.
+        \note If the number of elements to be appended is known, calls Reserve() once first may be more efficient.
+
+        \note The source type \c T explicitly disallows all pointer types,
+            especially (\c const) \ref Ch*.  This helps avoiding implicitly
+            referencing character strings with insufficient lifetime, use
+            \ref PushBack(GenericValue&, Allocator&) or \ref
+            PushBack(StringRefType, Allocator&).
+            All other pointer types would implicitly convert to \c bool,
+            use an explicit cast instead, if needed.
+        \note Amortized constant time complexity.
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (GenericValue&))
+    PushBack(T value, Allocator& allocator) {
+        GenericValue v(value);
+        return PushBack(v, allocator);
+    }
+
+    //! Remove the last element in the array.
+    /*!
+        \note Constant time complexity.
+    */
+    GenericValue& PopBack() {
+        RAPIDJSON_ASSERT(IsArray());
+        RAPIDJSON_ASSERT(!Empty());
+        GetElementsPointer()[--data_.a.size].~GenericValue();
+        return *this;
+    }
+
+    //! Remove an element of array by iterator.
+    /*!
+        \param pos iterator to the element to remove
+        \pre IsArray() == true && \ref Begin() <= \c pos < \ref End()
+        \return Iterator following the removed element. If the iterator pos refers to the last element, the End() iterator is returned.
+        \note Linear time complexity.
+    */
+    ValueIterator Erase(ConstValueIterator pos) {
+        return Erase(pos, pos + 1);
+    }
+
+    //! Remove elements in the range [first, last) of the array.
+    /*!
+        \param first iterator to the first element to remove
+        \param last  iterator following the last element to remove
+        \pre IsArray() == true && \ref Begin() <= \c first <= \c last <= \ref End()
+        \return Iterator following the last removed element.
+        \note Linear time complexity.
+    */
+    ValueIterator Erase(ConstValueIterator first, ConstValueIterator last) {
+        RAPIDJSON_ASSERT(IsArray());
+        RAPIDJSON_ASSERT(data_.a.size > 0);
+        RAPIDJSON_ASSERT(GetElementsPointer() != 0);
+        RAPIDJSON_ASSERT(first >= Begin());
+        RAPIDJSON_ASSERT(first <= last);
+        RAPIDJSON_ASSERT(last <= End());
+        ValueIterator pos = Begin() + (first - Begin());
+        for (ValueIterator itr = pos; itr != last; ++itr)
+            itr->~GenericValue();       
+        std::memmove(pos, last, static_cast<size_t>(End() - last) * sizeof(GenericValue));
+        data_.a.size -= static_cast<SizeType>(last - first);
+        return pos;
+    }
+
+    Array GetArray() { RAPIDJSON_ASSERT(IsArray()); return Array(*this); }
+    ConstArray GetArray() const { RAPIDJSON_ASSERT(IsArray()); return ConstArray(*this); }
+
+    //@}
+
+    //!@name Number
+    //@{
+
+    int GetInt() const          { RAPIDJSON_ASSERT(data_.f.flags & kIntFlag);   return data_.n.i.i;   }
+    unsigned GetUint() const    { RAPIDJSON_ASSERT(data_.f.flags & kUintFlag);  return data_.n.u.u;   }
+    int64_t GetInt64() const    { RAPIDJSON_ASSERT(data_.f.flags & kInt64Flag); return data_.n.i64; }
+    uint64_t GetUint64() const  { RAPIDJSON_ASSERT(data_.f.flags & kUint64Flag); return data_.n.u64; }
+
+    //! Get the value as double type.
+    /*! \note If the value is 64-bit integer type, it may lose precision. Use \c IsLosslessDouble() to check whether the converison is lossless.
+    */
+    double GetDouble() const {
+        RAPIDJSON_ASSERT(IsNumber());
+        if ((data_.f.flags & kDoubleFlag) != 0)                return data_.n.d;   // exact type, no conversion.
+        if ((data_.f.flags & kIntFlag) != 0)                   return data_.n.i.i; // int -> double
+        if ((data_.f.flags & kUintFlag) != 0)                  return data_.n.u.u; // unsigned -> double
+        if ((data_.f.flags & kInt64Flag) != 0)                 return static_cast<double>(data_.n.i64); // int64_t -> double (may lose precision)
+        RAPIDJSON_ASSERT((data_.f.flags & kUint64Flag) != 0);  return static_cast<double>(data_.n.u64); // uint64_t -> double (may lose precision)
+    }
+
+    //! Get the value as float type.
+    /*! \note If the value is 64-bit integer type, it may lose precision. Use \c IsLosslessFloat() to check whether the converison is lossless.
+    */
+    float GetFloat() const {
+        return static_cast<float>(GetDouble());
+    }
+
+    GenericValue& SetInt(int i)             { this->~GenericValue(); new (this) GenericValue(i);    return *this; }
+    GenericValue& SetUint(unsigned u)       { this->~GenericValue(); new (this) GenericValue(u);    return *this; }
+    GenericValue& SetInt64(int64_t i64)     { this->~GenericValue(); new (this) GenericValue(i64);  return *this; }
+    GenericValue& SetUint64(uint64_t u64)   { this->~GenericValue(); new (this) GenericValue(u64);  return *this; }
+    GenericValue& SetDouble(double d)       { this->~GenericValue(); new (this) GenericValue(d);    return *this; }
+    GenericValue& SetFloat(float f)         { this->~GenericValue(); new (this) GenericValue(static_cast<double>(f)); return *this; }
+
+    //@}
+
+    //!@name String
+    //@{
+
+    const Ch* GetString() const { RAPIDJSON_ASSERT(IsString()); return (data_.f.flags & kInlineStrFlag) ? data_.ss.str : GetStringPointer(); }
+
+    //! Get the length of string.
+    /*! Since rapidjson permits "\\u0000" in the json string, strlen(v.GetString()) may not equal to v.GetStringLength().
+    */
+    SizeType GetStringLength() const { RAPIDJSON_ASSERT(IsString()); return ((data_.f.flags & kInlineStrFlag) ? (data_.ss.GetLength()) : data_.s.length); }
+
+    //! Set this value as a string without copying source string.
+    /*! This version has better performance with supplied length, and also support string containing null character.
+        \param s source string pointer. 
+        \param length The length of source string, excluding the trailing null terminator.
+        \return The value itself for fluent API.
+        \post IsString() == true && GetString() == s && GetStringLength() == length
+        \see SetString(StringRefType)
+    */
+    GenericValue& SetString(const Ch* s, SizeType length) { return SetString(StringRef(s, length)); }
+
+    //! Set this value as a string without copying source string.
+    /*! \param s source string reference
+        \return The value itself for fluent API.
+        \post IsString() == true && GetString() == s && GetStringLength() == s.length
+    */
+    GenericValue& SetString(StringRefType s) { this->~GenericValue(); SetStringRaw(s); return *this; }
+
+    //! Set this value as a string by copying from source string.
+    /*! This version has better performance with supplied length, and also support string containing null character.
+        \param s source string. 
+        \param length The length of source string, excluding the trailing null terminator.
+        \param allocator Allocator for allocating copied buffer. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \post IsString() == true && GetString() != s && strcmp(GetString(),s) == 0 && GetStringLength() == length
+    */
+    GenericValue& SetString(const Ch* s, SizeType length, Allocator& allocator) { return SetString(StringRef(s, length), allocator); }
+
+    //! Set this value as a string by copying from source string.
+    /*! \param s source string. 
+        \param allocator Allocator for allocating copied buffer. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \post IsString() == true && GetString() != s && strcmp(GetString(),s) == 0 && GetStringLength() == length
+    */
+    GenericValue& SetString(const Ch* s, Allocator& allocator) { return SetString(StringRef(s), allocator); }
+
+    //! Set this value as a string by copying from source string.
+    /*! \param s source string reference
+        \param allocator Allocator for allocating copied buffer. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \post IsString() == true && GetString() != s.s && strcmp(GetString(),s) == 0 && GetStringLength() == length
+    */
+    GenericValue& SetString(StringRefType s, Allocator& allocator) { this->~GenericValue(); SetStringRaw(s, allocator); return *this; }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Set this value as a string by copying from source string.
+    /*! \param s source string.
+        \param allocator Allocator for allocating copied buffer. Commonly use GenericDocument::GetAllocator().
+        \return The value itself for fluent API.
+        \post IsString() == true && GetString() != s.data() && strcmp(GetString(),s.data() == 0 && GetStringLength() == s.size()
+        \note Requires the definition of the preprocessor symbol \ref RAPIDJSON_HAS_STDSTRING.
+    */
+    GenericValue& SetString(const std::basic_string<Ch>& s, Allocator& allocator) { return SetString(StringRef(s), allocator); }
+#endif
+
+    //@}
+
+    //!@name Array
+    //@{
+
+    //! Templated version for checking whether this value is type T.
+    /*!
+        \tparam T Either \c bool, \c int, \c unsigned, \c int64_t, \c uint64_t, \c double, \c float, \c const \c char*, \c std::basic_string<Ch>
+    */
+    template <typename T>
+    bool Is() const { return internal::TypeHelper<ValueType, T>::Is(*this); }
+
+    template <typename T>
+    T Get() const { return internal::TypeHelper<ValueType, T>::Get(*this); }
+
+    template <typename T>
+    T Get() { return internal::TypeHelper<ValueType, T>::Get(*this); }
+
+    template<typename T>
+    ValueType& Set(const T& data) { return internal::TypeHelper<ValueType, T>::Set(*this, data); }
+
+    template<typename T>
+    ValueType& Set(const T& data, AllocatorType& allocator) { return internal::TypeHelper<ValueType, T>::Set(*this, data, allocator); }
+
+    //@}
+
+    //! Generate events of this value to a Handler.
+    /*! This function adopts the GoF visitor pattern.
+        Typical usage is to output this JSON value as JSON text via Writer, which is a Handler.
+        It can also be used to deep clone this value via GenericDocument, which is also a Handler.
+        \tparam Handler type of handler.
+        \param handler An object implementing concept Handler.
+    */
+    template <typename Handler>
+    bool Accept(Handler& handler) const {
+        switch(GetType()) {
+        case kNullType:     return handler.Null();
+        case kFalseType:    return handler.Bool(false);
+        case kTrueType:     return handler.Bool(true);
+
+        case kObjectType:
+            if (RAPIDJSON_UNLIKELY(!handler.StartObject()))
+                return false;
+            for (ConstMemberIterator m = MemberBegin(); m != MemberEnd(); ++m) {
+                RAPIDJSON_ASSERT(m->name.IsString()); // User may change the type of name by MemberIterator.
+                if (RAPIDJSON_UNLIKELY(!handler.Key(m->name.GetString(), m->name.GetStringLength(), (m->name.data_.f.flags & kCopyFlag) != 0)))
+                    return false;
+                if (RAPIDJSON_UNLIKELY(!m->value.Accept(handler)))
+                    return false;
+            }
+            return handler.EndObject(data_.o.size);
+
+        case kArrayType:
+            if (RAPIDJSON_UNLIKELY(!handler.StartArray()))
+                return false;
+            for (const GenericValue* v = Begin(); v != End(); ++v)
+                if (RAPIDJSON_UNLIKELY(!v->Accept(handler)))
+                    return false;
+            return handler.EndArray(data_.a.size);
+    
+        case kStringType:
+            return handler.String(GetString(), GetStringLength(), (data_.f.flags & kCopyFlag) != 0);
+    
+        default:
+            RAPIDJSON_ASSERT(GetType() == kNumberType);
+            if (IsDouble())         return handler.Double(data_.n.d);
+            else if (IsInt())       return handler.Int(data_.n.i.i);
+            else if (IsUint())      return handler.Uint(data_.n.u.u);
+            else if (IsInt64())     return handler.Int64(data_.n.i64);
+            else                    return handler.Uint64(data_.n.u64);
+        }
+    }
+
+private:
+    template <typename, typename> friend class GenericValue;
+    template <typename, typename, typename> friend class GenericDocument;
+
+    enum {
+        kBoolFlag       = 0x0008,
+        kNumberFlag     = 0x0010,
+        kIntFlag        = 0x0020,
+        kUintFlag       = 0x0040,
+        kInt64Flag      = 0x0080,
+        kUint64Flag     = 0x0100,
+        kDoubleFlag     = 0x0200,
+        kStringFlag     = 0x0400,
+        kCopyFlag       = 0x0800,
+        kInlineStrFlag  = 0x1000,
+
+        // Initial flags of different types.
+        kNullFlag = kNullType,
+        kTrueFlag = kTrueType | kBoolFlag,
+        kFalseFlag = kFalseType | kBoolFlag,
+        kNumberIntFlag = kNumberType | kNumberFlag | kIntFlag | kInt64Flag,
+        kNumberUintFlag = kNumberType | kNumberFlag | kUintFlag | kUint64Flag | kInt64Flag,
+        kNumberInt64Flag = kNumberType | kNumberFlag | kInt64Flag,
+        kNumberUint64Flag = kNumberType | kNumberFlag | kUint64Flag,
+        kNumberDoubleFlag = kNumberType | kNumberFlag | kDoubleFlag,
+        kNumberAnyFlag = kNumberType | kNumberFlag | kIntFlag | kInt64Flag | kUintFlag | kUint64Flag | kDoubleFlag,
+        kConstStringFlag = kStringType | kStringFlag,
+        kCopyStringFlag = kStringType | kStringFlag | kCopyFlag,
+        kShortStringFlag = kStringType | kStringFlag | kCopyFlag | kInlineStrFlag,
+        kObjectFlag = kObjectType,
+        kArrayFlag = kArrayType,
+
+        kTypeMask = 0x07
+    };
+
+    static const SizeType kDefaultArrayCapacity = 16;
+    static const SizeType kDefaultObjectCapacity = 16;
+
+    struct Flag {
+#if RAPIDJSON_48BITPOINTER_OPTIMIZATION
+        char payload[sizeof(SizeType) * 2 + 6];     // 2 x SizeType + lower 48-bit pointer
+#elif RAPIDJSON_64BIT
+        char payload[sizeof(SizeType) * 2 + sizeof(void*) + 6]; // 6 padding bytes
+#else
+        char payload[sizeof(SizeType) * 2 + sizeof(void*) + 2]; // 2 padding bytes
+#endif
+        uint16_t flags;
+    };
+
+    struct String {
+        SizeType length;
+        SizeType hashcode;  //!< reserved
+        const Ch* str;
+    };  // 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+    // implementation detail: ShortString can represent zero-terminated strings up to MaxSize chars
+    // (excluding the terminating zero) and store a value to determine the length of the contained
+    // string in the last character str[LenPos] by storing "MaxSize - length" there. If the string
+    // to store has the maximal length of MaxSize then str[LenPos] will be 0 and therefore act as
+    // the string terminator as well. For getting the string length back from that value just use
+    // "MaxSize - str[LenPos]".
+    // This allows to store 13-chars strings in 32-bit mode, 21-chars strings in 64-bit mode,
+    // 13-chars strings for RAPIDJSON_48BITPOINTER_OPTIMIZATION=1 inline (for `UTF8`-encoded strings).
+    struct ShortString {
+        enum { MaxChars = sizeof(static_cast<Flag*>(0)->payload) / sizeof(Ch), MaxSize = MaxChars - 1, LenPos = MaxSize };
+        Ch str[MaxChars];
+
+        inline static bool Usable(SizeType len) { return                       (MaxSize >= len); }
+        inline void     SetLength(SizeType len) { str[LenPos] = static_cast<Ch>(MaxSize -  len); }
+        inline SizeType GetLength() const       { return  static_cast<SizeType>(MaxSize -  str[LenPos]); }
+    };  // at most as many bytes as "String" above => 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+    // By using proper binary layout, retrieval of different integer types do not need conversions.
+    union Number {
+#if RAPIDJSON_ENDIAN == RAPIDJSON_LITTLEENDIAN
+        struct I {
+            int i;
+            char padding[4];
+        }i;
+        struct U {
+            unsigned u;
+            char padding2[4];
+        }u;
+#else
+        struct I {
+            char padding[4];
+            int i;
+        }i;
+        struct U {
+            char padding2[4];
+            unsigned u;
+        }u;
+#endif
+        int64_t i64;
+        uint64_t u64;
+        double d;
+    };  // 8 bytes
+
+    struct ObjectData {
+        SizeType size;
+        SizeType capacity;
+        Member* members;
+    };  // 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+    struct ArrayData {
+        SizeType size;
+        SizeType capacity;
+        GenericValue* elements;
+    };  // 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
+
+    union Data {
+        String s;
+        ShortString ss;
+        Number n;
+        ObjectData o;
+        ArrayData a;
+        Flag f;
+    };  // 16 bytes in 32-bit mode, 24 bytes in 64-bit mode, 16 bytes in 64-bit with RAPIDJSON_48BITPOINTER_OPTIMIZATION
+
+    RAPIDJSON_FORCEINLINE const Ch* GetStringPointer() const { return RAPIDJSON_GETPOINTER(Ch, data_.s.str); }
+    RAPIDJSON_FORCEINLINE const Ch* SetStringPointer(const Ch* str) { return RAPIDJSON_SETPOINTER(Ch, data_.s.str, str); }
+    RAPIDJSON_FORCEINLINE GenericValue* GetElementsPointer() const { return RAPIDJSON_GETPOINTER(GenericValue, data_.a.elements); }
+    RAPIDJSON_FORCEINLINE GenericValue* SetElementsPointer(GenericValue* elements) { return RAPIDJSON_SETPOINTER(GenericValue, data_.a.elements, elements); }
+    RAPIDJSON_FORCEINLINE Member* GetMembersPointer() const { return RAPIDJSON_GETPOINTER(Member, data_.o.members); }
+    RAPIDJSON_FORCEINLINE Member* SetMembersPointer(Member* members) { return RAPIDJSON_SETPOINTER(Member, data_.o.members, members); }
+
+    // Initialize this value as array with initial data, without calling destructor.
+    void SetArrayRaw(GenericValue* values, SizeType count, Allocator& allocator) {
+        data_.f.flags = kArrayFlag;
+        if (count) {
+            GenericValue* e = static_cast<GenericValue*>(allocator.Malloc(count * sizeof(GenericValue)));
+            SetElementsPointer(e);
+            std::memcpy(e, values, count * sizeof(GenericValue));
+        }
+        else
+            SetElementsPointer(0);
+        data_.a.size = data_.a.capacity = count;
+    }
+
+    //! Initialize this value as object with initial data, without calling destructor.
+    void SetObjectRaw(Member* members, SizeType count, Allocator& allocator) {
+        data_.f.flags = kObjectFlag;
+        if (count) {
+            Member* m = static_cast<Member*>(allocator.Malloc(count * sizeof(Member)));
+            SetMembersPointer(m);
+            std::memcpy(m, members, count * sizeof(Member));
+        }
+        else
+            SetMembersPointer(0);
+        data_.o.size = data_.o.capacity = count;
+    }
+
+    //! Initialize this value as constant string, without calling destructor.
+    void SetStringRaw(StringRefType s) RAPIDJSON_NOEXCEPT {
+        data_.f.flags = kConstStringFlag;
+        SetStringPointer(s);
+        data_.s.length = s.length;
+    }
+
+    //! Initialize this value as copy string with initial data, without calling destructor.
+    void SetStringRaw(StringRefType s, Allocator& allocator) {
+        Ch* str = 0;
+        if (ShortString::Usable(s.length)) {
+            data_.f.flags = kShortStringFlag;
+            data_.ss.SetLength(s.length);
+            str = data_.ss.str;
+        } else {
+            data_.f.flags = kCopyStringFlag;
+            data_.s.length = s.length;
+            str = static_cast<Ch *>(allocator.Malloc((s.length + 1) * sizeof(Ch)));
+            SetStringPointer(str);
+        }
+        std::memcpy(str, s, s.length * sizeof(Ch));
+        str[s.length] = '\0';
+    }
+
+    //! Assignment without calling destructor
+    void RawAssign(GenericValue& rhs) RAPIDJSON_NOEXCEPT {
+        data_ = rhs.data_;
+        // data_.f.flags = rhs.data_.f.flags;
+        rhs.data_.f.flags = kNullFlag;
+    }
+
+    template <typename SourceAllocator>
+    bool StringEqual(const GenericValue<Encoding, SourceAllocator>& rhs) const {
+        RAPIDJSON_ASSERT(IsString());
+        RAPIDJSON_ASSERT(rhs.IsString());
+
+        const SizeType len1 = GetStringLength();
+        const SizeType len2 = rhs.GetStringLength();
+        if(len1 != len2) { return false; }
+
+        const Ch* const str1 = GetString();
+        const Ch* const str2 = rhs.GetString();
+        if(str1 == str2) { return true; } // fast path for constant string
+
+        return (std::memcmp(str1, str2, sizeof(Ch) * len1) == 0);
+    }
+
+    Data data_;
+};
+
+//! GenericValue with UTF8 encoding
+typedef GenericValue<UTF8<> > Value;
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericDocument 
+
+//! A document for parsing JSON text as DOM.
+/*!
+    \note implements Handler concept
+    \tparam Encoding Encoding for both parsing and string storage.
+    \tparam Allocator Allocator for allocating memory for the DOM
+    \tparam StackAllocator Allocator for allocating memory for stack during parsing.
+    \warning Although GenericDocument inherits from GenericValue, the API does \b not provide any virtual functions, especially no virtual destructor.  To avoid memory leaks, do not \c delete a GenericDocument object via a pointer to a GenericValue.
+*/
+template <typename Encoding, typename Allocator = MemoryPoolAllocator<>, typename StackAllocator = CrtAllocator>
+class GenericDocument : public GenericValue<Encoding, Allocator> {
+public:
+    typedef typename Encoding::Ch Ch;                       //!< Character type derived from Encoding.
+    typedef GenericValue<Encoding, Allocator> ValueType;    //!< Value type of the document.
+    typedef Allocator AllocatorType;                        //!< Allocator type from template parameter.
+
+    //! Constructor
+    /*! Creates an empty document of specified type.
+        \param type             Mandatory type of object to create.
+        \param allocator        Optional allocator for allocating memory.
+        \param stackCapacity    Optional initial capacity of stack in bytes.
+        \param stackAllocator   Optional allocator for allocating memory for stack.
+    */
+    explicit GenericDocument(Type type, Allocator* allocator = 0, size_t stackCapacity = kDefaultStackCapacity, StackAllocator* stackAllocator = 0) :
+        GenericValue<Encoding, Allocator>(type),  allocator_(allocator), ownAllocator_(0), stack_(stackAllocator, stackCapacity), parseResult_()
+    {
+        if (!allocator_)
+            ownAllocator_ = allocator_ = RAPIDJSON_NEW(Allocator)();
+    }
+
+    //! Constructor
+    /*! Creates an empty document which type is Null. 
+        \param allocator        Optional allocator for allocating memory.
+        \param stackCapacity    Optional initial capacity of stack in bytes.
+        \param stackAllocator   Optional allocator for allocating memory for stack.
+    */
+    GenericDocument(Allocator* allocator = 0, size_t stackCapacity = kDefaultStackCapacity, StackAllocator* stackAllocator = 0) : 
+        allocator_(allocator), ownAllocator_(0), stack_(stackAllocator, stackCapacity), parseResult_()
+    {
+        if (!allocator_)
+            ownAllocator_ = allocator_ = RAPIDJSON_NEW(Allocator)();
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    //! Move constructor in C++11
+    GenericDocument(GenericDocument&& rhs) RAPIDJSON_NOEXCEPT
+        : ValueType(std::forward<ValueType>(rhs)), // explicit cast to avoid prohibited move from Document
+          allocator_(rhs.allocator_),
+          ownAllocator_(rhs.ownAllocator_),
+          stack_(std::move(rhs.stack_)),
+          parseResult_(rhs.parseResult_)
+    {
+        rhs.allocator_ = 0;
+        rhs.ownAllocator_ = 0;
+        rhs.parseResult_ = ParseResult();
+    }
+#endif
+
+    ~GenericDocument() {
+        Destroy();
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    //! Move assignment in C++11
+    GenericDocument& operator=(GenericDocument&& rhs) RAPIDJSON_NOEXCEPT
+    {
+        // The cast to ValueType is necessary here, because otherwise it would
+        // attempt to call GenericValue's templated assignment operator.
+        ValueType::operator=(std::forward<ValueType>(rhs));
+
+        // Calling the destructor here would prematurely call stack_'s destructor
+        Destroy();
+
+        allocator_ = rhs.allocator_;
+        ownAllocator_ = rhs.ownAllocator_;
+        stack_ = std::move(rhs.stack_);
+        parseResult_ = rhs.parseResult_;
+
+        rhs.allocator_ = 0;
+        rhs.ownAllocator_ = 0;
+        rhs.parseResult_ = ParseResult();
+
+        return *this;
+    }
+#endif
+
+    //! Exchange the contents of this document with those of another.
+    /*!
+        \param rhs Another document.
+        \note Constant complexity.
+        \see GenericValue::Swap
+    */
+    GenericDocument& Swap(GenericDocument& rhs) RAPIDJSON_NOEXCEPT {
+        ValueType::Swap(rhs);
+        stack_.Swap(rhs.stack_);
+        internal::Swap(allocator_, rhs.allocator_);
+        internal::Swap(ownAllocator_, rhs.ownAllocator_);
+        internal::Swap(parseResult_, rhs.parseResult_);
+        return *this;
+    }
+
+    // Allow Swap with ValueType.
+    // Refer to Effective C++ 3rd Edition/Item 33: Avoid hiding inherited names.
+    using ValueType::Swap;
+
+    //! free-standing swap function helper
+    /*!
+        Helper function to enable support for common swap implementation pattern based on \c std::swap:
+        \code
+        void swap(MyClass& a, MyClass& b) {
+            using std::swap;
+            swap(a.doc, b.doc);
+            // ...
+        }
+        \endcode
+        \see Swap()
+     */
+    friend inline void swap(GenericDocument& a, GenericDocument& b) RAPIDJSON_NOEXCEPT { a.Swap(b); }
+
+    //! Populate this document by a generator which produces SAX events.
+    /*! \tparam Generator A functor with <tt>bool f(Handler)</tt> prototype.
+        \param g Generator functor which sends SAX events to the parameter.
+        \return The document itself for fluent API.
+    */
+    template <typename Generator>
+    GenericDocument& Populate(Generator& g) {
+        ClearStackOnExit scope(*this);
+        if (g(*this)) {
+            RAPIDJSON_ASSERT(stack_.GetSize() == sizeof(ValueType)); // Got one and only one root object
+            ValueType::operator=(*stack_.template Pop<ValueType>(1));// Move value from stack to document
+        }
+        return *this;
+    }
+
+    //!@name Parse from stream
+    //!@{
+
+    //! Parse JSON text from an input stream (with Encoding conversion)
+    /*! \tparam parseFlags Combination of \ref ParseFlag.
+        \tparam SourceEncoding Encoding of input stream
+        \tparam InputStream Type of input stream, implementing Stream concept
+        \param is Input stream to be parsed.
+        \return The document itself for fluent API.
+    */
+    template <unsigned parseFlags, typename SourceEncoding, typename InputStream>
+    GenericDocument& ParseStream(InputStream& is) {
+        GenericReader<SourceEncoding, Encoding, StackAllocator> reader(
+            stack_.HasAllocator() ? &stack_.GetAllocator() : 0);
+        ClearStackOnExit scope(*this);
+        parseResult_ = reader.template Parse<parseFlags>(is, *this);
+        if (parseResult_) {
+            RAPIDJSON_ASSERT(stack_.GetSize() == sizeof(ValueType)); // Got one and only one root object
+            ValueType::operator=(*stack_.template Pop<ValueType>(1));// Move value from stack to document
+        }
+        return *this;
+    }
+
+    //! Parse JSON text from an input stream
+    /*! \tparam parseFlags Combination of \ref ParseFlag.
+        \tparam InputStream Type of input stream, implementing Stream concept
+        \param is Input stream to be parsed.
+        \return The document itself for fluent API.
+    */
+    template <unsigned parseFlags, typename InputStream>
+    GenericDocument& ParseStream(InputStream& is) {
+        return ParseStream<parseFlags, Encoding, InputStream>(is);
+    }
+
+    //! Parse JSON text from an input stream (with \ref kParseDefaultFlags)
+    /*! \tparam InputStream Type of input stream, implementing Stream concept
+        \param is Input stream to be parsed.
+        \return The document itself for fluent API.
+    */
+    template <typename InputStream>
+    GenericDocument& ParseStream(InputStream& is) {
+        return ParseStream<kParseDefaultFlags, Encoding, InputStream>(is);
+    }
+    //!@}
+
+    //!@name Parse in-place from mutable string
+    //!@{
+
+    //! Parse JSON text from a mutable string
+    /*! \tparam parseFlags Combination of \ref ParseFlag.
+        \param str Mutable zero-terminated string to be parsed.
+        \return The document itself for fluent API.
+    */
+    template <unsigned parseFlags>
+    GenericDocument& ParseInsitu(Ch* str) {
+        GenericInsituStringStream<Encoding> s(str);
+        return ParseStream<parseFlags | kParseInsituFlag>(s);
+    }
+
+    //! Parse JSON text from a mutable string (with \ref kParseDefaultFlags)
+    /*! \param str Mutable zero-terminated string to be parsed.
+        \return The document itself for fluent API.
+    */
+    GenericDocument& ParseInsitu(Ch* str) {
+        return ParseInsitu<kParseDefaultFlags>(str);
+    }
+    //!@}
+
+    //!@name Parse from read-only string
+    //!@{
+
+    //! Parse JSON text from a read-only string (with Encoding conversion)
+    /*! \tparam parseFlags Combination of \ref ParseFlag (must not contain \ref kParseInsituFlag).
+        \tparam SourceEncoding Transcoding from input Encoding
+        \param str Read-only zero-terminated string to be parsed.
+    */
+    template <unsigned parseFlags, typename SourceEncoding>
+    GenericDocument& Parse(const typename SourceEncoding::Ch* str) {
+        RAPIDJSON_ASSERT(!(parseFlags & kParseInsituFlag));
+        GenericStringStream<SourceEncoding> s(str);
+        return ParseStream<parseFlags, SourceEncoding>(s);
+    }
+
+    //! Parse JSON text from a read-only string
+    /*! \tparam parseFlags Combination of \ref ParseFlag (must not contain \ref kParseInsituFlag).
+        \param str Read-only zero-terminated string to be parsed.
+    */
+    template <unsigned parseFlags>
+    GenericDocument& Parse(const Ch* str) {
+        return Parse<parseFlags, Encoding>(str);
+    }
+
+    //! Parse JSON text from a read-only string (with \ref kParseDefaultFlags)
+    /*! \param str Read-only zero-terminated string to be parsed.
+    */
+    GenericDocument& Parse(const Ch* str) {
+        return Parse<kParseDefaultFlags>(str);
+    }
+
+    template <unsigned parseFlags, typename SourceEncoding>
+    GenericDocument& Parse(const typename SourceEncoding::Ch* str, size_t length) {
+        RAPIDJSON_ASSERT(!(parseFlags & kParseInsituFlag));
+        MemoryStream ms(reinterpret_cast<const char*>(str), length * sizeof(typename SourceEncoding::Ch));
+        EncodedInputStream<SourceEncoding, MemoryStream> is(ms);
+        ParseStream<parseFlags, SourceEncoding>(is);
+        return *this;
+    }
+
+    template <unsigned parseFlags>
+    GenericDocument& Parse(const Ch* str, size_t length) {
+        return Parse<parseFlags, Encoding>(str, length);
+    }
+    
+    GenericDocument& Parse(const Ch* str, size_t length) {
+        return Parse<kParseDefaultFlags>(str, length);
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    template <unsigned parseFlags, typename SourceEncoding>
+    GenericDocument& Parse(const std::basic_string<typename SourceEncoding::Ch>& str) {
+        // c_str() is constant complexity according to standard. Should be faster than Parse(const char*, size_t)
+        return Parse<parseFlags, SourceEncoding>(str.c_str());
+    }
+
+    template <unsigned parseFlags>
+    GenericDocument& Parse(const std::basic_string<Ch>& str) {
+        return Parse<parseFlags, Encoding>(str.c_str());
+    }
+
+    GenericDocument& Parse(const std::basic_string<Ch>& str) {
+        return Parse<kParseDefaultFlags>(str);
+    }
+#endif // RAPIDJSON_HAS_STDSTRING    
+
+    //!@}
+
+    //!@name Handling parse errors
+    //!@{
+
+    //! Whether a parse error has occured in the last parsing.
+    bool HasParseError() const { return parseResult_.IsError(); }
+
+    //! Get the \ref ParseErrorCode of last parsing.
+    ParseErrorCode GetParseError() const { return parseResult_.Code(); }
+
+    //! Get the position of last parsing error in input, 0 otherwise.
+    size_t GetErrorOffset() const { return parseResult_.Offset(); }
+
+    //! Implicit conversion to get the last parse result
+#ifndef __clang // -Wdocumentation
+    /*! \return \ref ParseResult of the last parse operation
+
+        \code
+          Document doc;
+          ParseResult ok = doc.Parse(json);
+          if (!ok)
+            printf( "JSON parse error: %s (%u)\n", GetParseError_En(ok.Code()), ok.Offset());
+        \endcode
+     */
+#endif
+    operator ParseResult() const { return parseResult_; }
+    //!@}
+
+    //! Get the allocator of this document.
+    Allocator& GetAllocator() {
+        RAPIDJSON_ASSERT(allocator_);
+        return *allocator_;
+    }
+
+    //! Get the capacity of stack in bytes.
+    size_t GetStackCapacity() const { return stack_.GetCapacity(); }
+
+private:
+    // clear stack on any exit from ParseStream, e.g. due to exception
+    struct ClearStackOnExit {
+        explicit ClearStackOnExit(GenericDocument& d) : d_(d) {}
+        ~ClearStackOnExit() { d_.ClearStack(); }
+    private:
+        ClearStackOnExit(const ClearStackOnExit&);
+        ClearStackOnExit& operator=(const ClearStackOnExit&);
+        GenericDocument& d_;
+    };
+
+    // callers of the following private Handler functions
+    // template <typename,typename,typename> friend class GenericReader; // for parsing
+    template <typename, typename> friend class GenericValue; // for deep copying
+
+public:
+    // Implementation of Handler
+    bool Null() { new (stack_.template Push<ValueType>()) ValueType(); return true; }
+    bool Bool(bool b) { new (stack_.template Push<ValueType>()) ValueType(b); return true; }
+    bool Int(int i) { new (stack_.template Push<ValueType>()) ValueType(i); return true; }
+    bool Uint(unsigned i) { new (stack_.template Push<ValueType>()) ValueType(i); return true; }
+    bool Int64(int64_t i) { new (stack_.template Push<ValueType>()) ValueType(i); return true; }
+    bool Uint64(uint64_t i) { new (stack_.template Push<ValueType>()) ValueType(i); return true; }
+    bool Double(double d) { new (stack_.template Push<ValueType>()) ValueType(d); return true; }
+
+    bool RawNumber(const Ch* str, SizeType length, bool copy) { 
+        if (copy) 
+            new (stack_.template Push<ValueType>()) ValueType(str, length, GetAllocator());
+        else
+            new (stack_.template Push<ValueType>()) ValueType(str, length);
+        return true;
+    }
+
+    bool String(const Ch* str, SizeType length, bool copy) { 
+        if (copy) 
+            new (stack_.template Push<ValueType>()) ValueType(str, length, GetAllocator());
+        else
+            new (stack_.template Push<ValueType>()) ValueType(str, length);
+        return true;
+    }
+
+    bool StartObject() { new (stack_.template Push<ValueType>()) ValueType(kObjectType); return true; }
+    
+    bool Key(const Ch* str, SizeType length, bool copy) { return String(str, length, copy); }
+
+    bool EndObject(SizeType memberCount) {
+        typename ValueType::Member* members = stack_.template Pop<typename ValueType::Member>(memberCount);
+        stack_.template Top<ValueType>()->SetObjectRaw(members, memberCount, GetAllocator());
+        return true;
+    }
+
+    bool StartArray() { new (stack_.template Push<ValueType>()) ValueType(kArrayType); return true; }
+    
+    bool EndArray(SizeType elementCount) {
+        ValueType* elements = stack_.template Pop<ValueType>(elementCount);
+        stack_.template Top<ValueType>()->SetArrayRaw(elements, elementCount, GetAllocator());
+        return true;
+    }
+
+private:
+    //! Prohibit copying
+    GenericDocument(const GenericDocument&);
+    //! Prohibit assignment
+    GenericDocument& operator=(const GenericDocument&);
+
+    void ClearStack() {
+        if (Allocator::kNeedFree)
+            while (stack_.GetSize() > 0)    // Here assumes all elements in stack array are GenericValue (Member is actually 2 GenericValue objects)
+                (stack_.template Pop<ValueType>(1))->~ValueType();
+        else
+            stack_.Clear();
+        stack_.ShrinkToFit();
+    }
+
+    void Destroy() {
+        RAPIDJSON_DELETE(ownAllocator_);
+    }
+
+    static const size_t kDefaultStackCapacity = 1024;
+    Allocator* allocator_;
+    Allocator* ownAllocator_;
+    internal::Stack<StackAllocator> stack_;
+    ParseResult parseResult_;
+};
+
+//! GenericDocument with UTF8 encoding
+typedef GenericDocument<UTF8<> > Document;
+
+//! Helper class for accessing Value of array type.
+/*!
+    Instance of this helper class is obtained by \c GenericValue::GetArray().
+    In addition to all APIs for array type, it provides range-based for loop if \c RAPIDJSON_HAS_CXX11_RANGE_FOR=1.
+*/
+template <bool Const, typename ValueT>
+class GenericArray {
+public:
+    typedef GenericArray<true, ValueT> ConstArray;
+    typedef GenericArray<false, ValueT> Array;
+    typedef ValueT PlainType;
+    typedef typename internal::MaybeAddConst<Const,PlainType>::Type ValueType;
+    typedef ValueType* ValueIterator;  // This may be const or non-const iterator
+    typedef const ValueT* ConstValueIterator;
+    typedef typename ValueType::AllocatorType AllocatorType;
+    typedef typename ValueType::StringRefType StringRefType;
+
+    template <typename, typename>
+    friend class GenericValue;
+
+    GenericArray(const GenericArray& rhs) : value_(rhs.value_) {}
+    GenericArray& operator=(const GenericArray& rhs) { value_ = rhs.value_; return *this; }
+    ~GenericArray() {}
+
+    SizeType Size() const { return value_.Size(); }
+    SizeType Capacity() const { return value_.Capacity(); }
+    bool Empty() const { return value_.Empty(); }
+    void Clear() const { value_.Clear(); }
+    ValueType& operator[](SizeType index) const {  return value_[index]; }
+    ValueIterator Begin() const { return value_.Begin(); }
+    ValueIterator End() const { return value_.End(); }
+    GenericArray Reserve(SizeType newCapacity, AllocatorType &allocator) const { value_.Reserve(newCapacity, allocator); return *this; }
+    GenericArray PushBack(ValueType& value, AllocatorType& allocator) const { value_.PushBack(value, allocator); return *this; }
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericArray PushBack(ValueType&& value, AllocatorType& allocator) const { value_.PushBack(value, allocator); return *this; }
+#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericArray PushBack(StringRefType value, AllocatorType& allocator) const { value_.PushBack(value, allocator); return *this; }
+    template <typename T> RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (const GenericArray&)) PushBack(T value, AllocatorType& allocator) const { value_.PushBack(value, allocator); return *this; }
+    GenericArray PopBack() const { value_.PopBack(); return *this; }
+    ValueIterator Erase(ConstValueIterator pos) const { return value_.Erase(pos); }
+    ValueIterator Erase(ConstValueIterator first, ConstValueIterator last) const { return value_.Erase(first, last); }
+
+#if RAPIDJSON_HAS_CXX11_RANGE_FOR
+    ValueIterator begin() const { return value_.Begin(); }
+    ValueIterator end() const { return value_.End(); }
+#endif
+
+private:
+    GenericArray();
+    GenericArray(ValueType& value) : value_(value) {}
+    ValueType& value_;
+};
+
+//! Helper class for accessing Value of object type.
+/*!
+    Instance of this helper class is obtained by \c GenericValue::GetObject().
+    In addition to all APIs for array type, it provides range-based for loop if \c RAPIDJSON_HAS_CXX11_RANGE_FOR=1.
+*/
+template <bool Const, typename ValueT>
+class GenericObject {
+public:
+    typedef GenericObject<true, ValueT> ConstObject;
+    typedef GenericObject<false, ValueT> Object;
+    typedef ValueT PlainType;
+    typedef typename internal::MaybeAddConst<Const,PlainType>::Type ValueType;
+    typedef GenericMemberIterator<Const, typename ValueT::EncodingType, typename ValueT::AllocatorType> MemberIterator;  // This may be const or non-const iterator
+    typedef GenericMemberIterator<true, typename ValueT::EncodingType, typename ValueT::AllocatorType> ConstMemberIterator;
+    typedef typename ValueType::AllocatorType AllocatorType;
+    typedef typename ValueType::StringRefType StringRefType;
+    typedef typename ValueType::EncodingType EncodingType;
+    typedef typename ValueType::Ch Ch;
+
+    template <typename, typename>
+    friend class GenericValue;
+
+    GenericObject(const GenericObject& rhs) : value_(rhs.value_) {}
+    GenericObject& operator=(const GenericObject& rhs) { value_ = rhs.value_; return *this; }
+    ~GenericObject() {}
+
+    SizeType MemberCount() const { return value_.MemberCount(); }
+    SizeType MemberCapacity() const { return value_.MemberCapacity(); }
+    bool ObjectEmpty() const { return value_.ObjectEmpty(); }
+    template <typename T> ValueType& operator[](T* name) const { return value_[name]; }
+    template <typename SourceAllocator> ValueType& operator[](const GenericValue<EncodingType, SourceAllocator>& name) const { return value_[name]; }
+#if RAPIDJSON_HAS_STDSTRING
+    ValueType& operator[](const std::basic_string<Ch>& name) const { return value_[name]; }
+#endif
+    MemberIterator MemberBegin() const { return value_.MemberBegin(); }
+    MemberIterator MemberEnd() const { return value_.MemberEnd(); }
+    GenericObject MemberReserve(SizeType newCapacity, AllocatorType &allocator) const { value_.MemberReserve(newCapacity, allocator); return *this; }
+    bool HasMember(const Ch* name) const { return value_.HasMember(name); }
+#if RAPIDJSON_HAS_STDSTRING
+    bool HasMember(const std::basic_string<Ch>& name) const { return value_.HasMember(name); }
+#endif
+    template <typename SourceAllocator> bool HasMember(const GenericValue<EncodingType, SourceAllocator>& name) const { return value_.HasMember(name); }
+    MemberIterator FindMember(const Ch* name) const { return value_.FindMember(name); }
+    template <typename SourceAllocator> MemberIterator FindMember(const GenericValue<EncodingType, SourceAllocator>& name) const { return value_.FindMember(name); }
+#if RAPIDJSON_HAS_STDSTRING
+    MemberIterator FindMember(const std::basic_string<Ch>& name) const { return value_.FindMember(name); }
+#endif
+    GenericObject AddMember(ValueType& name, ValueType& value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+    GenericObject AddMember(ValueType& name, StringRefType value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+#if RAPIDJSON_HAS_STDSTRING
+    GenericObject AddMember(ValueType& name, std::basic_string<Ch>& value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+#endif
+    template <typename T> RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (ValueType&)) AddMember(ValueType& name, T value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericObject AddMember(ValueType&& name, ValueType&& value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+    GenericObject AddMember(ValueType&& name, ValueType& value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+    GenericObject AddMember(ValueType& name, ValueType&& value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+    GenericObject AddMember(StringRefType name, ValueType&& value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericObject AddMember(StringRefType name, ValueType& value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+    GenericObject AddMember(StringRefType name, StringRefType value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+    template <typename T> RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (GenericObject)) AddMember(StringRefType name, T value, AllocatorType& allocator) const { value_.AddMember(name, value, allocator); return *this; }
+    void RemoveAllMembers() { value_.RemoveAllMembers(); }
+    bool RemoveMember(const Ch* name) const { return value_.RemoveMember(name); }
+#if RAPIDJSON_HAS_STDSTRING
+    bool RemoveMember(const std::basic_string<Ch>& name) const { return value_.RemoveMember(name); }
+#endif
+    template <typename SourceAllocator> bool RemoveMember(const GenericValue<EncodingType, SourceAllocator>& name) const { return value_.RemoveMember(name); }
+    MemberIterator RemoveMember(MemberIterator m) const { return value_.RemoveMember(m); }
+    MemberIterator EraseMember(ConstMemberIterator pos) const { return value_.EraseMember(pos); }
+    MemberIterator EraseMember(ConstMemberIterator first, ConstMemberIterator last) const { return value_.EraseMember(first, last); }
+    bool EraseMember(const Ch* name) const { return value_.EraseMember(name); }
+#if RAPIDJSON_HAS_STDSTRING
+    bool EraseMember(const std::basic_string<Ch>& name) const { return EraseMember(ValueType(StringRef(name))); }
+#endif
+    template <typename SourceAllocator> bool EraseMember(const GenericValue<EncodingType, SourceAllocator>& name) const { return value_.EraseMember(name); }
+
+#if RAPIDJSON_HAS_CXX11_RANGE_FOR
+    MemberIterator begin() const { return value_.MemberBegin(); }
+    MemberIterator end() const { return value_.MemberEnd(); }
+#endif
+
+private:
+    GenericObject();
+    GenericObject(ValueType& value) : value_(value) {}
+    ValueType& value_;
+};
+
+RAPIDJSON_NAMESPACE_END
+RAPIDJSON_DIAG_POP
+
+#endif // RAPIDJSON_DOCUMENT_H_
diff --git a/external/rapidjson/encodedstream.h b/external/rapidjson/encodedstream.h
new file mode 100644
index 0000000..223601c
--- /dev/null
+++ b/external/rapidjson/encodedstream.h
@@ -0,0 +1,299 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_ENCODEDSTREAM_H_
+#define RAPIDJSON_ENCODEDSTREAM_H_
+
+#include "stream.h"
+#include "memorystream.h"
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Input byte stream wrapper with a statically bound encoding.
+/*!
+    \tparam Encoding The interpretation of encoding of the stream. Either UTF8, UTF16LE, UTF16BE, UTF32LE, UTF32BE.
+    \tparam InputByteStream Type of input byte stream. For example, FileReadStream.
+*/
+template <typename Encoding, typename InputByteStream>
+class EncodedInputStream {
+    RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+public:
+    typedef typename Encoding::Ch Ch;
+
+    EncodedInputStream(InputByteStream& is) : is_(is) { 
+        current_ = Encoding::TakeBOM(is_);
+    }
+
+    Ch Peek() const { return current_; }
+    Ch Take() { Ch c = current_; current_ = Encoding::Take(is_); return c; }
+    size_t Tell() const { return is_.Tell(); }
+
+    // Not implemented
+    void Put(Ch) { RAPIDJSON_ASSERT(false); }
+    void Flush() { RAPIDJSON_ASSERT(false); } 
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+private:
+    EncodedInputStream(const EncodedInputStream&);
+    EncodedInputStream& operator=(const EncodedInputStream&);
+
+    InputByteStream& is_;
+    Ch current_;
+};
+
+//! Specialized for UTF8 MemoryStream.
+template <>
+class EncodedInputStream<UTF8<>, MemoryStream> {
+public:
+    typedef UTF8<>::Ch Ch;
+
+    EncodedInputStream(MemoryStream& is) : is_(is) {
+        if (static_cast<unsigned char>(is_.Peek()) == 0xEFu) is_.Take();
+        if (static_cast<unsigned char>(is_.Peek()) == 0xBBu) is_.Take();
+        if (static_cast<unsigned char>(is_.Peek()) == 0xBFu) is_.Take();
+    }
+    Ch Peek() const { return is_.Peek(); }
+    Ch Take() { return is_.Take(); }
+    size_t Tell() const { return is_.Tell(); }
+
+    // Not implemented
+    void Put(Ch) {}
+    void Flush() {} 
+    Ch* PutBegin() { return 0; }
+    size_t PutEnd(Ch*) { return 0; }
+
+    MemoryStream& is_;
+
+private:
+    EncodedInputStream(const EncodedInputStream&);
+    EncodedInputStream& operator=(const EncodedInputStream&);
+};
+
+//! Output byte stream wrapper with statically bound encoding.
+/*!
+    \tparam Encoding The interpretation of encoding of the stream. Either UTF8, UTF16LE, UTF16BE, UTF32LE, UTF32BE.
+    \tparam OutputByteStream Type of input byte stream. For example, FileWriteStream.
+*/
+template <typename Encoding, typename OutputByteStream>
+class EncodedOutputStream {
+    RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+public:
+    typedef typename Encoding::Ch Ch;
+
+    EncodedOutputStream(OutputByteStream& os, bool putBOM = true) : os_(os) { 
+        if (putBOM)
+            Encoding::PutBOM(os_);
+    }
+
+    void Put(Ch c) { Encoding::Put(os_, c);  }
+    void Flush() { os_.Flush(); }
+
+    // Not implemented
+    Ch Peek() const { RAPIDJSON_ASSERT(false); return 0;}
+    Ch Take() { RAPIDJSON_ASSERT(false); return 0;}
+    size_t Tell() const { RAPIDJSON_ASSERT(false);  return 0; }
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+private:
+    EncodedOutputStream(const EncodedOutputStream&);
+    EncodedOutputStream& operator=(const EncodedOutputStream&);
+
+    OutputByteStream& os_;
+};
+
+#define RAPIDJSON_ENCODINGS_FUNC(x) UTF8<Ch>::x, UTF16LE<Ch>::x, UTF16BE<Ch>::x, UTF32LE<Ch>::x, UTF32BE<Ch>::x
+
+//! Input stream wrapper with dynamically bound encoding and automatic encoding detection.
+/*!
+    \tparam CharType Type of character for reading.
+    \tparam InputByteStream type of input byte stream to be wrapped.
+*/
+template <typename CharType, typename InputByteStream>
+class AutoUTFInputStream {
+    RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+public:
+    typedef CharType Ch;
+
+    //! Constructor.
+    /*!
+        \param is input stream to be wrapped.
+        \param type UTF encoding type if it is not detected from the stream.
+    */
+    AutoUTFInputStream(InputByteStream& is, UTFType type = kUTF8) : is_(&is), type_(type), hasBOM_(false) {
+        RAPIDJSON_ASSERT(type >= kUTF8 && type <= kUTF32BE);        
+        DetectType();
+        static const TakeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Take) };
+        takeFunc_ = f[type_];
+        current_ = takeFunc_(*is_);
+    }
+
+    UTFType GetType() const { return type_; }
+    bool HasBOM() const { return hasBOM_; }
+
+    Ch Peek() const { return current_; }
+    Ch Take() { Ch c = current_; current_ = takeFunc_(*is_); return c; }
+    size_t Tell() const { return is_->Tell(); }
+
+    // Not implemented
+    void Put(Ch) { RAPIDJSON_ASSERT(false); }
+    void Flush() { RAPIDJSON_ASSERT(false); } 
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+private:
+    AutoUTFInputStream(const AutoUTFInputStream&);
+    AutoUTFInputStream& operator=(const AutoUTFInputStream&);
+
+    // Detect encoding type with BOM or RFC 4627
+    void DetectType() {
+        // BOM (Byte Order Mark):
+        // 00 00 FE FF  UTF-32BE
+        // FF FE 00 00  UTF-32LE
+        // FE FF        UTF-16BE
+        // FF FE        UTF-16LE
+        // EF BB BF     UTF-8
+
+        const unsigned char* c = reinterpret_cast<const unsigned char *>(is_->Peek4());
+        if (!c)
+            return;
+
+        unsigned bom = static_cast<unsigned>(c[0] | (c[1] << 8) | (c[2] << 16) | (c[3] << 24));
+        hasBOM_ = false;
+        if (bom == 0xFFFE0000)                  { type_ = kUTF32BE; hasBOM_ = true; is_->Take(); is_->Take(); is_->Take(); is_->Take(); }
+        else if (bom == 0x0000FEFF)             { type_ = kUTF32LE; hasBOM_ = true; is_->Take(); is_->Take(); is_->Take(); is_->Take(); }
+        else if ((bom & 0xFFFF) == 0xFFFE)      { type_ = kUTF16BE; hasBOM_ = true; is_->Take(); is_->Take();                           }
+        else if ((bom & 0xFFFF) == 0xFEFF)      { type_ = kUTF16LE; hasBOM_ = true; is_->Take(); is_->Take();                           }
+        else if ((bom & 0xFFFFFF) == 0xBFBBEF)  { type_ = kUTF8;    hasBOM_ = true; is_->Take(); is_->Take(); is_->Take();              }
+
+        // RFC 4627: Section 3
+        // "Since the first two characters of a JSON text will always be ASCII
+        // characters [RFC0020], it is possible to determine whether an octet
+        // stream is UTF-8, UTF-16 (BE or LE), or UTF-32 (BE or LE) by looking
+        // at the pattern of nulls in the first four octets."
+        // 00 00 00 xx  UTF-32BE
+        // 00 xx 00 xx  UTF-16BE
+        // xx 00 00 00  UTF-32LE
+        // xx 00 xx 00  UTF-16LE
+        // xx xx xx xx  UTF-8
+
+        if (!hasBOM_) {
+            int pattern = (c[0] ? 1 : 0) | (c[1] ? 2 : 0) | (c[2] ? 4 : 0) | (c[3] ? 8 : 0);
+            switch (pattern) {
+            case 0x08: type_ = kUTF32BE; break;
+            case 0x0A: type_ = kUTF16BE; break;
+            case 0x01: type_ = kUTF32LE; break;
+            case 0x05: type_ = kUTF16LE; break;
+            case 0x0F: type_ = kUTF8;    break;
+            default: break; // Use type defined by user.
+            }
+        }
+
+        // Runtime check whether the size of character type is sufficient. It only perform checks with assertion.
+        if (type_ == kUTF16LE || type_ == kUTF16BE) RAPIDJSON_ASSERT(sizeof(Ch) >= 2);
+        if (type_ == kUTF32LE || type_ == kUTF32BE) RAPIDJSON_ASSERT(sizeof(Ch) >= 4);
+    }
+
+    typedef Ch (*TakeFunc)(InputByteStream& is);
+    InputByteStream* is_;
+    UTFType type_;
+    Ch current_;
+    TakeFunc takeFunc_;
+    bool hasBOM_;
+};
+
+//! Output stream wrapper with dynamically bound encoding and automatic encoding detection.
+/*!
+    \tparam CharType Type of character for writing.
+    \tparam OutputByteStream type of output byte stream to be wrapped.
+*/
+template <typename CharType, typename OutputByteStream>
+class AutoUTFOutputStream {
+    RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+public:
+    typedef CharType Ch;
+
+    //! Constructor.
+    /*!
+        \param os output stream to be wrapped.
+        \param type UTF encoding type.
+        \param putBOM Whether to write BOM at the beginning of the stream.
+    */
+    AutoUTFOutputStream(OutputByteStream& os, UTFType type, bool putBOM) : os_(&os), type_(type) {
+        RAPIDJSON_ASSERT(type >= kUTF8 && type <= kUTF32BE);
+
+        // Runtime check whether the size of character type is sufficient. It only perform checks with assertion.
+        if (type_ == kUTF16LE || type_ == kUTF16BE) RAPIDJSON_ASSERT(sizeof(Ch) >= 2);
+        if (type_ == kUTF32LE || type_ == kUTF32BE) RAPIDJSON_ASSERT(sizeof(Ch) >= 4);
+
+        static const PutFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Put) };
+        putFunc_ = f[type_];
+
+        if (putBOM)
+            PutBOM();
+    }
+
+    UTFType GetType() const { return type_; }
+
+    void Put(Ch c) { putFunc_(*os_, c); }
+    void Flush() { os_->Flush(); } 
+
+    // Not implemented
+    Ch Peek() const { RAPIDJSON_ASSERT(false); return 0;}
+    Ch Take() { RAPIDJSON_ASSERT(false); return 0;}
+    size_t Tell() const { RAPIDJSON_ASSERT(false); return 0; }
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+private:
+    AutoUTFOutputStream(const AutoUTFOutputStream&);
+    AutoUTFOutputStream& operator=(const AutoUTFOutputStream&);
+
+    void PutBOM() { 
+        typedef void (*PutBOMFunc)(OutputByteStream&);
+        static const PutBOMFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(PutBOM) };
+        f[type_](*os_);
+    }
+
+    typedef void (*PutFunc)(OutputByteStream&, Ch);
+
+    OutputByteStream* os_;
+    UTFType type_;
+    PutFunc putFunc_;
+};
+
+#undef RAPIDJSON_ENCODINGS_FUNC
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_FILESTREAM_H_
diff --git a/external/rapidjson/encodings.h b/external/rapidjson/encodings.h
new file mode 100644
index 0000000..7903e76
--- /dev/null
+++ b/external/rapidjson/encodings.h
@@ -0,0 +1,716 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_ENCODINGS_H_
+#define RAPIDJSON_ENCODINGS_H_
+
+#include "rapidjson.h"
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4244) // conversion from 'type1' to 'type2', possible loss of data
+RAPIDJSON_DIAG_OFF(4702)  // unreachable code
+#elif defined(__GNUC__)
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+RAPIDJSON_DIAG_OFF(overflow)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+// Encoding
+
+/*! \class rapidjson::Encoding
+    \brief Concept for encoding of Unicode characters.
+
+\code
+concept Encoding {
+    typename Ch;    //! Type of character. A "character" is actually a code unit in unicode's definition.
+
+    enum { supportUnicode = 1 }; // or 0 if not supporting unicode
+
+    //! \brief Encode a Unicode codepoint to an output stream.
+    //! \param os Output stream.
+    //! \param codepoint An unicode codepoint, ranging from 0x0 to 0x10FFFF inclusively.
+    template<typename OutputStream>
+    static void Encode(OutputStream& os, unsigned codepoint);
+
+    //! \brief Decode a Unicode codepoint from an input stream.
+    //! \param is Input stream.
+    //! \param codepoint Output of the unicode codepoint.
+    //! \return true if a valid codepoint can be decoded from the stream.
+    template <typename InputStream>
+    static bool Decode(InputStream& is, unsigned* codepoint);
+
+    //! \brief Validate one Unicode codepoint from an encoded stream.
+    //! \param is Input stream to obtain codepoint.
+    //! \param os Output for copying one codepoint.
+    //! \return true if it is valid.
+    //! \note This function just validating and copying the codepoint without actually decode it.
+    template <typename InputStream, typename OutputStream>
+    static bool Validate(InputStream& is, OutputStream& os);
+
+    // The following functions are deal with byte streams.
+
+    //! Take a character from input byte stream, skip BOM if exist.
+    template <typename InputByteStream>
+    static CharType TakeBOM(InputByteStream& is);
+
+    //! Take a character from input byte stream.
+    template <typename InputByteStream>
+    static Ch Take(InputByteStream& is);
+
+    //! Put BOM to output byte stream.
+    template <typename OutputByteStream>
+    static void PutBOM(OutputByteStream& os);
+
+    //! Put a character to output byte stream.
+    template <typename OutputByteStream>
+    static void Put(OutputByteStream& os, Ch c);
+};
+\endcode
+*/
+
+///////////////////////////////////////////////////////////////////////////////
+// UTF8
+
+//! UTF-8 encoding.
+/*! http://en.wikipedia.org/wiki/UTF-8
+    http://tools.ietf.org/html/rfc3629
+    \tparam CharType Code unit for storing 8-bit UTF-8 data. Default is char.
+    \note implements Encoding concept
+*/
+template<typename CharType = char>
+struct UTF8 {
+    typedef CharType Ch;
+
+    enum { supportUnicode = 1 };
+
+    template<typename OutputStream>
+    static void Encode(OutputStream& os, unsigned codepoint) {
+        if (codepoint <= 0x7F) 
+            os.Put(static_cast<Ch>(codepoint & 0xFF));
+        else if (codepoint <= 0x7FF) {
+            os.Put(static_cast<Ch>(0xC0 | ((codepoint >> 6) & 0xFF)));
+            os.Put(static_cast<Ch>(0x80 | ((codepoint & 0x3F))));
+        }
+        else if (codepoint <= 0xFFFF) {
+            os.Put(static_cast<Ch>(0xE0 | ((codepoint >> 12) & 0xFF)));
+            os.Put(static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
+            os.Put(static_cast<Ch>(0x80 | (codepoint & 0x3F)));
+        }
+        else {
+            RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+            os.Put(static_cast<Ch>(0xF0 | ((codepoint >> 18) & 0xFF)));
+            os.Put(static_cast<Ch>(0x80 | ((codepoint >> 12) & 0x3F)));
+            os.Put(static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
+            os.Put(static_cast<Ch>(0x80 | (codepoint & 0x3F)));
+        }
+    }
+
+    template<typename OutputStream>
+    static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
+        if (codepoint <= 0x7F) 
+            PutUnsafe(os, static_cast<Ch>(codepoint & 0xFF));
+        else if (codepoint <= 0x7FF) {
+            PutUnsafe(os, static_cast<Ch>(0xC0 | ((codepoint >> 6) & 0xFF)));
+            PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint & 0x3F))));
+        }
+        else if (codepoint <= 0xFFFF) {
+            PutUnsafe(os, static_cast<Ch>(0xE0 | ((codepoint >> 12) & 0xFF)));
+            PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
+            PutUnsafe(os, static_cast<Ch>(0x80 | (codepoint & 0x3F)));
+        }
+        else {
+            RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+            PutUnsafe(os, static_cast<Ch>(0xF0 | ((codepoint >> 18) & 0xFF)));
+            PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 12) & 0x3F)));
+            PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
+            PutUnsafe(os, static_cast<Ch>(0x80 | (codepoint & 0x3F)));
+        }
+    }
+
+    template <typename InputStream>
+    static bool Decode(InputStream& is, unsigned* codepoint) {
+#define COPY() c = is.Take(); *codepoint = (*codepoint << 6) | (static_cast<unsigned char>(c) & 0x3Fu)
+#define TRANS(mask) result &= ((GetRange(static_cast<unsigned char>(c)) & mask) != 0)
+#define TAIL() COPY(); TRANS(0x70)
+        typename InputStream::Ch c = is.Take();
+        if (!(c & 0x80)) {
+            *codepoint = static_cast<unsigned char>(c);
+            return true;
+        }
+
+        unsigned char type = GetRange(static_cast<unsigned char>(c));
+        if (type >= 32) {
+            *codepoint = 0;
+        } else {
+            *codepoint = (0xFFu >> type) & static_cast<unsigned char>(c);
+        }
+        bool result = true;
+        switch (type) {
+        case 2: TAIL(); return result;
+        case 3: TAIL(); TAIL(); return result;
+        case 4: COPY(); TRANS(0x50); TAIL(); return result;
+        case 5: COPY(); TRANS(0x10); TAIL(); TAIL(); return result;
+        case 6: TAIL(); TAIL(); TAIL(); return result;
+        case 10: COPY(); TRANS(0x20); TAIL(); return result;
+        case 11: COPY(); TRANS(0x60); TAIL(); TAIL(); return result;
+        default: return false;
+        }
+#undef COPY
+#undef TRANS
+#undef TAIL
+    }
+
+    template <typename InputStream, typename OutputStream>
+    static bool Validate(InputStream& is, OutputStream& os) {
+#define COPY() os.Put(c = is.Take())
+#define TRANS(mask) result &= ((GetRange(static_cast<unsigned char>(c)) & mask) != 0)
+#define TAIL() COPY(); TRANS(0x70)
+        Ch c;
+        COPY();
+        if (!(c & 0x80))
+            return true;
+
+        bool result = true;
+        switch (GetRange(static_cast<unsigned char>(c))) {
+        case 2: TAIL(); return result;
+        case 3: TAIL(); TAIL(); return result;
+        case 4: COPY(); TRANS(0x50); TAIL(); return result;
+        case 5: COPY(); TRANS(0x10); TAIL(); TAIL(); return result;
+        case 6: TAIL(); TAIL(); TAIL(); return result;
+        case 10: COPY(); TRANS(0x20); TAIL(); return result;
+        case 11: COPY(); TRANS(0x60); TAIL(); TAIL(); return result;
+        default: return false;
+        }
+#undef COPY
+#undef TRANS
+#undef TAIL
+    }
+
+    static unsigned char GetRange(unsigned char c) {
+        // Referring to DFA of http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
+        // With new mapping 1 -> 0x10, 7 -> 0x20, 9 -> 0x40, such that AND operation can test multiple types.
+        static const unsigned char type[] = {
+            0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+            0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+            0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+            0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+            0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
+            0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,
+            0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
+            0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
+            8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2,  2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+            10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
+        };
+        return type[c];
+    }
+
+    template <typename InputByteStream>
+    static CharType TakeBOM(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        typename InputByteStream::Ch c = Take(is);
+        if (static_cast<unsigned char>(c) != 0xEFu) return c;
+        c = is.Take();
+        if (static_cast<unsigned char>(c) != 0xBBu) return c;
+        c = is.Take();
+        if (static_cast<unsigned char>(c) != 0xBFu) return c;
+        c = is.Take();
+        return c;
+    }
+
+    template <typename InputByteStream>
+    static Ch Take(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        return static_cast<Ch>(is.Take());
+    }
+
+    template <typename OutputByteStream>
+    static void PutBOM(OutputByteStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xEFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xBBu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xBFu));
+    }
+
+    template <typename OutputByteStream>
+    static void Put(OutputByteStream& os, Ch c) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(c));
+    }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// UTF16
+
+//! UTF-16 encoding.
+/*! http://en.wikipedia.org/wiki/UTF-16
+    http://tools.ietf.org/html/rfc2781
+    \tparam CharType Type for storing 16-bit UTF-16 data. Default is wchar_t. C++11 may use char16_t instead.
+    \note implements Encoding concept
+
+    \note For in-memory access, no need to concern endianness. The code units and code points are represented by CPU's endianness.
+    For streaming, use UTF16LE and UTF16BE, which handle endianness.
+*/
+template<typename CharType = wchar_t>
+struct UTF16 {
+    typedef CharType Ch;
+    RAPIDJSON_STATIC_ASSERT(sizeof(Ch) >= 2);
+
+    enum { supportUnicode = 1 };
+
+    template<typename OutputStream>
+    static void Encode(OutputStream& os, unsigned codepoint) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
+        if (codepoint <= 0xFFFF) {
+            RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair 
+            os.Put(static_cast<typename OutputStream::Ch>(codepoint));
+        }
+        else {
+            RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+            unsigned v = codepoint - 0x10000;
+            os.Put(static_cast<typename OutputStream::Ch>((v >> 10) | 0xD800));
+            os.Put(static_cast<typename OutputStream::Ch>((v & 0x3FF) | 0xDC00));
+        }
+    }
+
+
+    template<typename OutputStream>
+    static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
+        if (codepoint <= 0xFFFF) {
+            RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair 
+            PutUnsafe(os, static_cast<typename OutputStream::Ch>(codepoint));
+        }
+        else {
+            RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+            unsigned v = codepoint - 0x10000;
+            PutUnsafe(os, static_cast<typename OutputStream::Ch>((v >> 10) | 0xD800));
+            PutUnsafe(os, static_cast<typename OutputStream::Ch>((v & 0x3FF) | 0xDC00));
+        }
+    }
+
+    template <typename InputStream>
+    static bool Decode(InputStream& is, unsigned* codepoint) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2);
+        typename InputStream::Ch c = is.Take();
+        if (c < 0xD800 || c > 0xDFFF) {
+            *codepoint = static_cast<unsigned>(c);
+            return true;
+        }
+        else if (c <= 0xDBFF) {
+            *codepoint = (static_cast<unsigned>(c) & 0x3FF) << 10;
+            c = is.Take();
+            *codepoint |= (static_cast<unsigned>(c) & 0x3FF);
+            *codepoint += 0x10000;
+            return c >= 0xDC00 && c <= 0xDFFF;
+        }
+        return false;
+    }
+
+    template <typename InputStream, typename OutputStream>
+    static bool Validate(InputStream& is, OutputStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2);
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
+        typename InputStream::Ch c;
+        os.Put(static_cast<typename OutputStream::Ch>(c = is.Take()));
+        if (c < 0xD800 || c > 0xDFFF)
+            return true;
+        else if (c <= 0xDBFF) {
+            os.Put(c = is.Take());
+            return c >= 0xDC00 && c <= 0xDFFF;
+        }
+        return false;
+    }
+};
+
+//! UTF-16 little endian encoding.
+template<typename CharType = wchar_t>
+struct UTF16LE : UTF16<CharType> {
+    template <typename InputByteStream>
+    static CharType TakeBOM(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        CharType c = Take(is);
+        return static_cast<uint16_t>(c) == 0xFEFFu ? Take(is) : c;
+    }
+
+    template <typename InputByteStream>
+    static CharType Take(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        unsigned c = static_cast<uint8_t>(is.Take());
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
+        return static_cast<CharType>(c);
+    }
+
+    template <typename OutputByteStream>
+    static void PutBOM(OutputByteStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
+    }
+
+    template <typename OutputByteStream>
+    static void Put(OutputByteStream& os, CharType c) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(static_cast<unsigned>(c) & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>((static_cast<unsigned>(c) >> 8) & 0xFFu));
+    }
+};
+
+//! UTF-16 big endian encoding.
+template<typename CharType = wchar_t>
+struct UTF16BE : UTF16<CharType> {
+    template <typename InputByteStream>
+    static CharType TakeBOM(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        CharType c = Take(is);
+        return static_cast<uint16_t>(c) == 0xFEFFu ? Take(is) : c;
+    }
+
+    template <typename InputByteStream>
+    static CharType Take(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        unsigned c = static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take()));
+        return static_cast<CharType>(c);
+    }
+
+    template <typename OutputByteStream>
+    static void PutBOM(OutputByteStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
+    }
+
+    template <typename OutputByteStream>
+    static void Put(OutputByteStream& os, CharType c) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>((static_cast<unsigned>(c) >> 8) & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(static_cast<unsigned>(c) & 0xFFu));
+    }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// UTF32
+
+//! UTF-32 encoding. 
+/*! http://en.wikipedia.org/wiki/UTF-32
+    \tparam CharType Type for storing 32-bit UTF-32 data. Default is unsigned. C++11 may use char32_t instead.
+    \note implements Encoding concept
+
+    \note For in-memory access, no need to concern endianness. The code units and code points are represented by CPU's endianness.
+    For streaming, use UTF32LE and UTF32BE, which handle endianness.
+*/
+template<typename CharType = unsigned>
+struct UTF32 {
+    typedef CharType Ch;
+    RAPIDJSON_STATIC_ASSERT(sizeof(Ch) >= 4);
+
+    enum { supportUnicode = 1 };
+
+    template<typename OutputStream>
+    static void Encode(OutputStream& os, unsigned codepoint) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 4);
+        RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+        os.Put(codepoint);
+    }
+
+    template<typename OutputStream>
+    static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 4);
+        RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
+        PutUnsafe(os, codepoint);
+    }
+
+    template <typename InputStream>
+    static bool Decode(InputStream& is, unsigned* codepoint) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 4);
+        Ch c = is.Take();
+        *codepoint = c;
+        return c <= 0x10FFFF;
+    }
+
+    template <typename InputStream, typename OutputStream>
+    static bool Validate(InputStream& is, OutputStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 4);
+        Ch c;
+        os.Put(c = is.Take());
+        return c <= 0x10FFFF;
+    }
+};
+
+//! UTF-32 little endian enocoding.
+template<typename CharType = unsigned>
+struct UTF32LE : UTF32<CharType> {
+    template <typename InputByteStream>
+    static CharType TakeBOM(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        CharType c = Take(is);
+        return static_cast<uint32_t>(c) == 0x0000FEFFu ? Take(is) : c;
+    }
+
+    template <typename InputByteStream>
+    static CharType Take(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        unsigned c = static_cast<uint8_t>(is.Take());
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 16;
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 24;
+        return static_cast<CharType>(c);
+    }
+
+    template <typename OutputByteStream>
+    static void PutBOM(OutputByteStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
+    }
+
+    template <typename OutputByteStream>
+    static void Put(OutputByteStream& os, CharType c) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(c & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>((c >> 8) & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>((c >> 16) & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>((c >> 24) & 0xFFu));
+    }
+};
+
+//! UTF-32 big endian encoding.
+template<typename CharType = unsigned>
+struct UTF32BE : UTF32<CharType> {
+    template <typename InputByteStream>
+    static CharType TakeBOM(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        CharType c = Take(is);
+        return static_cast<uint32_t>(c) == 0x0000FEFFu ? Take(is) : c; 
+    }
+
+    template <typename InputByteStream>
+    static CharType Take(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        unsigned c = static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 24;
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 16;
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
+        c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take()));
+        return static_cast<CharType>(c);
+    }
+
+    template <typename OutputByteStream>
+    static void PutBOM(OutputByteStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
+    }
+
+    template <typename OutputByteStream>
+    static void Put(OutputByteStream& os, CharType c) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>((c >> 24) & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>((c >> 16) & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>((c >> 8) & 0xFFu));
+        os.Put(static_cast<typename OutputByteStream::Ch>(c & 0xFFu));
+    }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// ASCII
+
+//! ASCII encoding.
+/*! http://en.wikipedia.org/wiki/ASCII
+    \tparam CharType Code unit for storing 7-bit ASCII data. Default is char.
+    \note implements Encoding concept
+*/
+template<typename CharType = char>
+struct ASCII {
+    typedef CharType Ch;
+
+    enum { supportUnicode = 0 };
+
+    template<typename OutputStream>
+    static void Encode(OutputStream& os, unsigned codepoint) {
+        RAPIDJSON_ASSERT(codepoint <= 0x7F);
+        os.Put(static_cast<Ch>(codepoint & 0xFF));
+    }
+
+    template<typename OutputStream>
+    static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
+        RAPIDJSON_ASSERT(codepoint <= 0x7F);
+        PutUnsafe(os, static_cast<Ch>(codepoint & 0xFF));
+    }
+
+    template <typename InputStream>
+    static bool Decode(InputStream& is, unsigned* codepoint) {
+        uint8_t c = static_cast<uint8_t>(is.Take());
+        *codepoint = c;
+        return c <= 0X7F;
+    }
+
+    template <typename InputStream, typename OutputStream>
+    static bool Validate(InputStream& is, OutputStream& os) {
+        uint8_t c = static_cast<uint8_t>(is.Take());
+        os.Put(static_cast<typename OutputStream::Ch>(c));
+        return c <= 0x7F;
+    }
+
+    template <typename InputByteStream>
+    static CharType TakeBOM(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        uint8_t c = static_cast<uint8_t>(Take(is));
+        return static_cast<Ch>(c);
+    }
+
+    template <typename InputByteStream>
+    static Ch Take(InputByteStream& is) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
+        return static_cast<Ch>(is.Take());
+    }
+
+    template <typename OutputByteStream>
+    static void PutBOM(OutputByteStream& os) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        (void)os;
+    }
+
+    template <typename OutputByteStream>
+    static void Put(OutputByteStream& os, Ch c) {
+        RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
+        os.Put(static_cast<typename OutputByteStream::Ch>(c));
+    }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// AutoUTF
+
+//! Runtime-specified UTF encoding type of a stream.
+enum UTFType {
+    kUTF8 = 0,      //!< UTF-8.
+    kUTF16LE = 1,   //!< UTF-16 little endian.
+    kUTF16BE = 2,   //!< UTF-16 big endian.
+    kUTF32LE = 3,   //!< UTF-32 little endian.
+    kUTF32BE = 4    //!< UTF-32 big endian.
+};
+
+//! Dynamically select encoding according to stream's runtime-specified UTF encoding type.
+/*! \note This class can be used with AutoUTFInputtStream and AutoUTFOutputStream, which provides GetType().
+*/
+template<typename CharType>
+struct AutoUTF {
+    typedef CharType Ch;
+
+    enum { supportUnicode = 1 };
+
+#define RAPIDJSON_ENCODINGS_FUNC(x) UTF8<Ch>::x, UTF16LE<Ch>::x, UTF16BE<Ch>::x, UTF32LE<Ch>::x, UTF32BE<Ch>::x
+
+    template<typename OutputStream>
+    static RAPIDJSON_FORCEINLINE void Encode(OutputStream& os, unsigned codepoint) {
+        typedef void (*EncodeFunc)(OutputStream&, unsigned);
+        static const EncodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Encode) };
+        (*f[os.GetType()])(os, codepoint);
+    }
+
+    template<typename OutputStream>
+    static RAPIDJSON_FORCEINLINE void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
+        typedef void (*EncodeFunc)(OutputStream&, unsigned);
+        static const EncodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(EncodeUnsafe) };
+        (*f[os.GetType()])(os, codepoint);
+    }
+
+    template <typename InputStream>
+    static RAPIDJSON_FORCEINLINE bool Decode(InputStream& is, unsigned* codepoint) {
+        typedef bool (*DecodeFunc)(InputStream&, unsigned*);
+        static const DecodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Decode) };
+        return (*f[is.GetType()])(is, codepoint);
+    }
+
+    template <typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE bool Validate(InputStream& is, OutputStream& os) {
+        typedef bool (*ValidateFunc)(InputStream&, OutputStream&);
+        static const ValidateFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Validate) };
+        return (*f[is.GetType()])(is, os);
+    }
+
+#undef RAPIDJSON_ENCODINGS_FUNC
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Transcoder
+
+//! Encoding conversion.
+template<typename SourceEncoding, typename TargetEncoding>
+struct Transcoder {
+    //! Take one Unicode codepoint from source encoding, convert it to target encoding and put it to the output stream.
+    template<typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE bool Transcode(InputStream& is, OutputStream& os) {
+        unsigned codepoint;
+        if (!SourceEncoding::Decode(is, &codepoint))
+            return false;
+        TargetEncoding::Encode(os, codepoint);
+        return true;
+    }
+
+    template<typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE bool TranscodeUnsafe(InputStream& is, OutputStream& os) {
+        unsigned codepoint;
+        if (!SourceEncoding::Decode(is, &codepoint))
+            return false;
+        TargetEncoding::EncodeUnsafe(os, codepoint);
+        return true;
+    }
+
+    //! Validate one Unicode codepoint from an encoded stream.
+    template<typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE bool Validate(InputStream& is, OutputStream& os) {
+        return Transcode(is, os);   // Since source/target encoding is different, must transcode.
+    }
+};
+
+// Forward declaration.
+template<typename Stream>
+inline void PutUnsafe(Stream& stream, typename Stream::Ch c);
+
+//! Specialization of Transcoder with same source and target encoding.
+template<typename Encoding>
+struct Transcoder<Encoding, Encoding> {
+    template<typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE bool Transcode(InputStream& is, OutputStream& os) {
+        os.Put(is.Take());  // Just copy one code unit. This semantic is different from primary template class.
+        return true;
+    }
+    
+    template<typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE bool TranscodeUnsafe(InputStream& is, OutputStream& os) {
+        PutUnsafe(os, is.Take());  // Just copy one code unit. This semantic is different from primary template class.
+        return true;
+    }
+    
+    template<typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE bool Validate(InputStream& is, OutputStream& os) {
+        return Encoding::Validate(is, os);  // source/target encoding are the same
+    }
+};
+
+RAPIDJSON_NAMESPACE_END
+
+#if defined(__GNUC__) || defined(_MSC_VER)
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_ENCODINGS_H_
diff --git a/external/rapidjson/error/en.h b/external/rapidjson/error/en.h
new file mode 100644
index 0000000..2db838b
--- /dev/null
+++ b/external/rapidjson/error/en.h
@@ -0,0 +1,74 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_ERROR_EN_H_
+#define RAPIDJSON_ERROR_EN_H_
+
+#include "error.h"
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(switch-enum)
+RAPIDJSON_DIAG_OFF(covered-switch-default)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Maps error code of parsing into error message.
+/*!
+    \ingroup RAPIDJSON_ERRORS
+    \param parseErrorCode Error code obtained in parsing.
+    \return the error message.
+    \note User can make a copy of this function for localization.
+        Using switch-case is safer for future modification of error codes.
+*/
+inline const RAPIDJSON_ERROR_CHARTYPE* GetParseError_En(ParseErrorCode parseErrorCode) {
+    switch (parseErrorCode) {
+        case kParseErrorNone:                           return RAPIDJSON_ERROR_STRING("No error.");
+
+        case kParseErrorDocumentEmpty:                  return RAPIDJSON_ERROR_STRING("The document is empty.");
+        case kParseErrorDocumentRootNotSingular:        return RAPIDJSON_ERROR_STRING("The document root must not be followed by other values.");
+    
+        case kParseErrorValueInvalid:                   return RAPIDJSON_ERROR_STRING("Invalid value.");
+    
+        case kParseErrorObjectMissName:                 return RAPIDJSON_ERROR_STRING("Missing a name for object member.");
+        case kParseErrorObjectMissColon:                return RAPIDJSON_ERROR_STRING("Missing a colon after a name of object member.");
+        case kParseErrorObjectMissCommaOrCurlyBracket:  return RAPIDJSON_ERROR_STRING("Missing a comma or '}' after an object member.");
+    
+        case kParseErrorArrayMissCommaOrSquareBracket:  return RAPIDJSON_ERROR_STRING("Missing a comma or ']' after an array element.");
+
+        case kParseErrorStringUnicodeEscapeInvalidHex:  return RAPIDJSON_ERROR_STRING("Incorrect hex digit after \\u escape in string.");
+        case kParseErrorStringUnicodeSurrogateInvalid:  return RAPIDJSON_ERROR_STRING("The surrogate pair in string is invalid.");
+        case kParseErrorStringEscapeInvalid:            return RAPIDJSON_ERROR_STRING("Invalid escape character in string.");
+        case kParseErrorStringMissQuotationMark:        return RAPIDJSON_ERROR_STRING("Missing a closing quotation mark in string.");
+        case kParseErrorStringInvalidEncoding:          return RAPIDJSON_ERROR_STRING("Invalid encoding in string.");
+
+        case kParseErrorNumberTooBig:                   return RAPIDJSON_ERROR_STRING("Number too big to be stored in double.");
+        case kParseErrorNumberMissFraction:             return RAPIDJSON_ERROR_STRING("Miss fraction part in number.");
+        case kParseErrorNumberMissExponent:             return RAPIDJSON_ERROR_STRING("Miss exponent in number.");
+
+        case kParseErrorTermination:                    return RAPIDJSON_ERROR_STRING("Terminate parsing due to Handler error.");
+        case kParseErrorUnspecificSyntaxError:          return RAPIDJSON_ERROR_STRING("Unspecific syntax error.");
+
+        default:                                        return RAPIDJSON_ERROR_STRING("Unknown error.");
+    }
+}
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_ERROR_EN_H_
diff --git a/external/rapidjson/error/error.h b/external/rapidjson/error/error.h
new file mode 100644
index 0000000..9311d2f
--- /dev/null
+++ b/external/rapidjson/error/error.h
@@ -0,0 +1,161 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_ERROR_ERROR_H_
+#define RAPIDJSON_ERROR_ERROR_H_
+
+#include "../rapidjson.h"
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+#endif
+
+/*! \file error.h */
+
+/*! \defgroup RAPIDJSON_ERRORS RapidJSON error handling */
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_ERROR_CHARTYPE
+
+//! Character type of error messages.
+/*! \ingroup RAPIDJSON_ERRORS
+    The default character type is \c char.
+    On Windows, user can define this macro as \c TCHAR for supporting both
+    unicode/non-unicode settings.
+*/
+#ifndef RAPIDJSON_ERROR_CHARTYPE
+#define RAPIDJSON_ERROR_CHARTYPE char
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_ERROR_STRING
+
+//! Macro for converting string literial to \ref RAPIDJSON_ERROR_CHARTYPE[].
+/*! \ingroup RAPIDJSON_ERRORS
+    By default this conversion macro does nothing.
+    On Windows, user can define this macro as \c _T(x) for supporting both
+    unicode/non-unicode settings.
+*/
+#ifndef RAPIDJSON_ERROR_STRING
+#define RAPIDJSON_ERROR_STRING(x) x
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+// ParseErrorCode
+
+//! Error code of parsing.
+/*! \ingroup RAPIDJSON_ERRORS
+    \see GenericReader::Parse, GenericReader::GetParseErrorCode
+*/
+enum ParseErrorCode {
+    kParseErrorNone = 0,                        //!< No error.
+
+    kParseErrorDocumentEmpty,                   //!< The document is empty.
+    kParseErrorDocumentRootNotSingular,         //!< The document root must not follow by other values.
+
+    kParseErrorValueInvalid,                    //!< Invalid value.
+
+    kParseErrorObjectMissName,                  //!< Missing a name for object member.
+    kParseErrorObjectMissColon,                 //!< Missing a colon after a name of object member.
+    kParseErrorObjectMissCommaOrCurlyBracket,   //!< Missing a comma or '}' after an object member.
+
+    kParseErrorArrayMissCommaOrSquareBracket,   //!< Missing a comma or ']' after an array element.
+
+    kParseErrorStringUnicodeEscapeInvalidHex,   //!< Incorrect hex digit after \\u escape in string.
+    kParseErrorStringUnicodeSurrogateInvalid,   //!< The surrogate pair in string is invalid.
+    kParseErrorStringEscapeInvalid,             //!< Invalid escape character in string.
+    kParseErrorStringMissQuotationMark,         //!< Missing a closing quotation mark in string.
+    kParseErrorStringInvalidEncoding,           //!< Invalid encoding in string.
+
+    kParseErrorNumberTooBig,                    //!< Number too big to be stored in double.
+    kParseErrorNumberMissFraction,              //!< Miss fraction part in number.
+    kParseErrorNumberMissExponent,              //!< Miss exponent in number.
+
+    kParseErrorTermination,                     //!< Parsing was terminated.
+    kParseErrorUnspecificSyntaxError            //!< Unspecific syntax error.
+};
+
+//! Result of parsing (wraps ParseErrorCode)
+/*!
+    \ingroup RAPIDJSON_ERRORS
+    \code
+        Document doc;
+        ParseResult ok = doc.Parse("[42]");
+        if (!ok) {
+            fprintf(stderr, "JSON parse error: %s (%u)",
+                    GetParseError_En(ok.Code()), ok.Offset());
+            exit(EXIT_FAILURE);
+        }
+    \endcode
+    \see GenericReader::Parse, GenericDocument::Parse
+*/
+struct ParseResult {
+    //!! Unspecified boolean type
+    typedef bool (ParseResult::*BooleanType)() const;
+public:
+    //! Default constructor, no error.
+    ParseResult() : code_(kParseErrorNone), offset_(0) {}
+    //! Constructor to set an error.
+    ParseResult(ParseErrorCode code, size_t offset) : code_(code), offset_(offset) {}
+
+    //! Get the error code.
+    ParseErrorCode Code() const { return code_; }
+    //! Get the error offset, if \ref IsError(), 0 otherwise.
+    size_t Offset() const { return offset_; }
+
+    //! Explicit conversion to \c bool, returns \c true, iff !\ref IsError().
+    operator BooleanType() const { return !IsError() ? &ParseResult::IsError : NULL; }
+    //! Whether the result is an error.
+    bool IsError() const { return code_ != kParseErrorNone; }
+
+    bool operator==(const ParseResult& that) const { return code_ == that.code_; }
+    bool operator==(ParseErrorCode code) const { return code_ == code; }
+    friend bool operator==(ParseErrorCode code, const ParseResult & err) { return code == err.code_; }
+
+    bool operator!=(const ParseResult& that) const { return !(*this == that); }
+    bool operator!=(ParseErrorCode code) const { return !(*this == code); }
+    friend bool operator!=(ParseErrorCode code, const ParseResult & err) { return err != code; }
+
+    //! Reset error code.
+    void Clear() { Set(kParseErrorNone); }
+    //! Update error code and offset.
+    void Set(ParseErrorCode code, size_t offset = 0) { code_ = code; offset_ = offset; }
+
+private:
+    ParseErrorCode code_;
+    size_t offset_;
+};
+
+//! Function pointer type of GetParseError().
+/*! \ingroup RAPIDJSON_ERRORS
+
+    This is the prototype for \c GetParseError_X(), where \c X is a locale.
+    User can dynamically change locale in runtime, e.g.:
+\code
+    GetParseErrorFunc GetParseError = GetParseError_En; // or whatever
+    const RAPIDJSON_ERROR_CHARTYPE* s = GetParseError(document.GetParseErrorCode());
+\endcode
+*/
+typedef const RAPIDJSON_ERROR_CHARTYPE* (*GetParseErrorFunc)(ParseErrorCode);
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_ERROR_ERROR_H_
diff --git a/external/rapidjson/filereadstream.h b/external/rapidjson/filereadstream.h
new file mode 100644
index 0000000..f1bfb7d
--- /dev/null
+++ b/external/rapidjson/filereadstream.h
@@ -0,0 +1,99 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_FILEREADSTREAM_H_
+#define RAPIDJSON_FILEREADSTREAM_H_
+
+#include "stream.h"
+#include <cstdio>
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+RAPIDJSON_DIAG_OFF(unreachable-code)
+RAPIDJSON_DIAG_OFF(missing-noreturn)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! File byte stream for input using fread().
+/*!
+    \note implements Stream concept
+*/
+class FileReadStream {
+public:
+    typedef char Ch;    //!< Character type (byte).
+
+    //! Constructor.
+    /*!
+        \param fp File pointer opened for read.
+        \param buffer user-supplied buffer.
+        \param bufferSize size of buffer in bytes. Must >=4 bytes.
+    */
+    FileReadStream(std::FILE* fp, char* buffer, size_t bufferSize) : fp_(fp), buffer_(buffer), bufferSize_(bufferSize), bufferLast_(0), current_(buffer_), readCount_(0), count_(0), eof_(false) { 
+        RAPIDJSON_ASSERT(fp_ != 0);
+        RAPIDJSON_ASSERT(bufferSize >= 4);
+        Read();
+    }
+
+    Ch Peek() const { return *current_; }
+    Ch Take() { Ch c = *current_; Read(); return c; }
+    size_t Tell() const { return count_ + static_cast<size_t>(current_ - buffer_); }
+
+    // Not implemented
+    void Put(Ch) { RAPIDJSON_ASSERT(false); }
+    void Flush() { RAPIDJSON_ASSERT(false); } 
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+    // For encoding detection only.
+    const Ch* Peek4() const {
+        return (current_ + 4 <= bufferLast_) ? current_ : 0;
+    }
+
+private:
+    void Read() {
+        if (current_ < bufferLast_)
+            ++current_;
+        else if (!eof_) {
+            count_ += readCount_;
+            readCount_ = std::fread(buffer_, 1, bufferSize_, fp_);
+            bufferLast_ = buffer_ + readCount_ - 1;
+            current_ = buffer_;
+
+            if (readCount_ < bufferSize_) {
+                buffer_[readCount_] = '\0';
+                ++bufferLast_;
+                eof_ = true;
+            }
+        }
+    }
+
+    std::FILE* fp_;
+    Ch *buffer_;
+    size_t bufferSize_;
+    Ch *bufferLast_;
+    Ch *current_;
+    size_t readCount_;
+    size_t count_;  //!< Number of characters read
+    bool eof_;
+};
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_FILESTREAM_H_
diff --git a/external/rapidjson/filewritestream.h b/external/rapidjson/filewritestream.h
new file mode 100644
index 0000000..3811f8b
--- /dev/null
+++ b/external/rapidjson/filewritestream.h
@@ -0,0 +1,104 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_FILEWRITESTREAM_H_
+#define RAPIDJSON_FILEWRITESTREAM_H_
+
+#include "stream.h"
+#include <cstdio>
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(unreachable-code)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Wrapper of C file stream for input using fread().
+/*!
+    \note implements Stream concept
+*/
+class FileWriteStream {
+public:
+    typedef char Ch;    //!< Character type. Only support char.
+
+    FileWriteStream(std::FILE* fp, char* buffer, size_t bufferSize) : fp_(fp), buffer_(buffer), bufferEnd_(buffer + bufferSize), current_(buffer_) { 
+        RAPIDJSON_ASSERT(fp_ != 0);
+    }
+
+    void Put(char c) { 
+        if (current_ >= bufferEnd_)
+            Flush();
+
+        *current_++ = c;
+    }
+
+    void PutN(char c, size_t n) {
+        size_t avail = static_cast<size_t>(bufferEnd_ - current_);
+        while (n > avail) {
+            std::memset(current_, c, avail);
+            current_ += avail;
+            Flush();
+            n -= avail;
+            avail = static_cast<size_t>(bufferEnd_ - current_);
+        }
+
+        if (n > 0) {
+            std::memset(current_, c, n);
+            current_ += n;
+        }
+    }
+
+    void Flush() {
+        if (current_ != buffer_) {
+            size_t result = std::fwrite(buffer_, 1, static_cast<size_t>(current_ - buffer_), fp_);
+            if (result < static_cast<size_t>(current_ - buffer_)) {
+                // failure deliberately ignored at this time
+                // added to avoid warn_unused_result build errors
+            }
+            current_ = buffer_;
+        }
+    }
+
+    // Not implemented
+    char Peek() const { RAPIDJSON_ASSERT(false); return 0; }
+    char Take() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t Tell() const { RAPIDJSON_ASSERT(false); return 0; }
+    char* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t PutEnd(char*) { RAPIDJSON_ASSERT(false); return 0; }
+
+private:
+    // Prohibit copy constructor & assignment operator.
+    FileWriteStream(const FileWriteStream&);
+    FileWriteStream& operator=(const FileWriteStream&);
+
+    std::FILE* fp_;
+    char *buffer_;
+    char *bufferEnd_;
+    char *current_;
+};
+
+//! Implement specialized version of PutN() with memset() for better performance.
+template<>
+inline void PutN(FileWriteStream& stream, char c, size_t n) {
+    stream.PutN(c, n);
+}
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_FILESTREAM_H_
diff --git a/external/rapidjson/fwd.h b/external/rapidjson/fwd.h
new file mode 100644
index 0000000..e8104e8
--- /dev/null
+++ b/external/rapidjson/fwd.h
@@ -0,0 +1,151 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_FWD_H_
+#define RAPIDJSON_FWD_H_
+
+#include "rapidjson.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+// encodings.h
+
+template<typename CharType> struct UTF8;
+template<typename CharType> struct UTF16;
+template<typename CharType> struct UTF16BE;
+template<typename CharType> struct UTF16LE;
+template<typename CharType> struct UTF32;
+template<typename CharType> struct UTF32BE;
+template<typename CharType> struct UTF32LE;
+template<typename CharType> struct ASCII;
+template<typename CharType> struct AutoUTF;
+
+template<typename SourceEncoding, typename TargetEncoding>
+struct Transcoder;
+
+// allocators.h
+
+class CrtAllocator;
+
+template <typename BaseAllocator>
+class MemoryPoolAllocator;
+
+// stream.h
+
+template <typename Encoding>
+struct GenericStringStream;
+
+typedef GenericStringStream<UTF8<char> > StringStream;
+
+template <typename Encoding>
+struct GenericInsituStringStream;
+
+typedef GenericInsituStringStream<UTF8<char> > InsituStringStream;
+
+// stringbuffer.h
+
+template <typename Encoding, typename Allocator>
+class GenericStringBuffer;
+
+typedef GenericStringBuffer<UTF8<char>, CrtAllocator> StringBuffer;
+
+// filereadstream.h
+
+class FileReadStream;
+
+// filewritestream.h
+
+class FileWriteStream;
+
+// memorybuffer.h
+
+template <typename Allocator>
+struct GenericMemoryBuffer;
+
+typedef GenericMemoryBuffer<CrtAllocator> MemoryBuffer;
+
+// memorystream.h
+
+struct MemoryStream;
+
+// reader.h
+
+template<typename Encoding, typename Derived>
+struct BaseReaderHandler;
+
+template <typename SourceEncoding, typename TargetEncoding, typename StackAllocator>
+class GenericReader;
+
+typedef GenericReader<UTF8<char>, UTF8<char>, CrtAllocator> Reader;
+
+// writer.h
+
+template<typename OutputStream, typename SourceEncoding, typename TargetEncoding, typename StackAllocator, unsigned writeFlags>
+class Writer;
+
+// prettywriter.h
+
+template<typename OutputStream, typename SourceEncoding, typename TargetEncoding, typename StackAllocator, unsigned writeFlags>
+class PrettyWriter;
+
+// document.h
+
+template <typename Encoding, typename Allocator> 
+struct GenericMember;
+
+template <bool Const, typename Encoding, typename Allocator>
+class GenericMemberIterator;
+
+template<typename CharType>
+struct GenericStringRef;
+
+template <typename Encoding, typename Allocator> 
+class GenericValue;
+
+typedef GenericValue<UTF8<char>, MemoryPoolAllocator<CrtAllocator> > Value;
+
+template <typename Encoding, typename Allocator, typename StackAllocator>
+class GenericDocument;
+
+typedef GenericDocument<UTF8<char>, MemoryPoolAllocator<CrtAllocator>, CrtAllocator> Document;
+
+// pointer.h
+
+template <typename ValueType, typename Allocator>
+class GenericPointer;
+
+typedef GenericPointer<Value, CrtAllocator> Pointer;
+
+// schema.h
+
+template <typename SchemaDocumentType>
+class IGenericRemoteSchemaDocumentProvider;
+
+template <typename ValueT, typename Allocator>
+class GenericSchemaDocument;
+
+typedef GenericSchemaDocument<Value, CrtAllocator> SchemaDocument;
+typedef IGenericRemoteSchemaDocumentProvider<SchemaDocument> IRemoteSchemaDocumentProvider;
+
+template <
+    typename SchemaDocumentType,
+    typename OutputHandler,
+    typename StateAllocator>
+class GenericSchemaValidator;
+
+typedef GenericSchemaValidator<SchemaDocument, BaseReaderHandler<UTF8<char>, void>, CrtAllocator> SchemaValidator;
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_RAPIDJSONFWD_H_
diff --git a/external/rapidjson/internal/biginteger.h b/external/rapidjson/internal/biginteger.h
new file mode 100644
index 0000000..9d3e88c
--- /dev/null
+++ b/external/rapidjson/internal/biginteger.h
@@ -0,0 +1,290 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_BIGINTEGER_H_
+#define RAPIDJSON_BIGINTEGER_H_
+
+#include "../rapidjson.h"
+
+#if defined(_MSC_VER) && defined(_M_AMD64)
+#include <intrin.h> // for _umul128
+#pragma intrinsic(_umul128)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+class BigInteger {
+public:
+    typedef uint64_t Type;
+
+    BigInteger(const BigInteger& rhs) : count_(rhs.count_) {
+        std::memcpy(digits_, rhs.digits_, count_ * sizeof(Type));
+    }
+
+    explicit BigInteger(uint64_t u) : count_(1) {
+        digits_[0] = u;
+    }
+
+    BigInteger(const char* decimals, size_t length) : count_(1) {
+        RAPIDJSON_ASSERT(length > 0);
+        digits_[0] = 0;
+        size_t i = 0;
+        const size_t kMaxDigitPerIteration = 19;  // 2^64 = 18446744073709551616 > 10^19
+        while (length >= kMaxDigitPerIteration) {
+            AppendDecimal64(decimals + i, decimals + i + kMaxDigitPerIteration);
+            length -= kMaxDigitPerIteration;
+            i += kMaxDigitPerIteration;
+        }
+
+        if (length > 0)
+            AppendDecimal64(decimals + i, decimals + i + length);
+    }
+    
+    BigInteger& operator=(const BigInteger &rhs)
+    {
+        if (this != &rhs) {
+            count_ = rhs.count_;
+            std::memcpy(digits_, rhs.digits_, count_ * sizeof(Type));
+        }
+        return *this;
+    }
+    
+    BigInteger& operator=(uint64_t u) {
+        digits_[0] = u;            
+        count_ = 1;
+        return *this;
+    }
+
+    BigInteger& operator+=(uint64_t u) {
+        Type backup = digits_[0];
+        digits_[0] += u;
+        for (size_t i = 0; i < count_ - 1; i++) {
+            if (digits_[i] >= backup)
+                return *this; // no carry
+            backup = digits_[i + 1];
+            digits_[i + 1] += 1;
+        }
+
+        // Last carry
+        if (digits_[count_ - 1] < backup)
+            PushBack(1);
+
+        return *this;
+    }
+
+    BigInteger& operator*=(uint64_t u) {
+        if (u == 0) return *this = 0;
+        if (u == 1) return *this;
+        if (*this == 1) return *this = u;
+
+        uint64_t k = 0;
+        for (size_t i = 0; i < count_; i++) {
+            uint64_t hi;
+            digits_[i] = MulAdd64(digits_[i], u, k, &hi);
+            k = hi;
+        }
+        
+        if (k > 0)
+            PushBack(k);
+
+        return *this;
+    }
+
+    BigInteger& operator*=(uint32_t u) {
+        if (u == 0) return *this = 0;
+        if (u == 1) return *this;
+        if (*this == 1) return *this = u;
+
+        uint64_t k = 0;
+        for (size_t i = 0; i < count_; i++) {
+            const uint64_t c = digits_[i] >> 32;
+            const uint64_t d = digits_[i] & 0xFFFFFFFF;
+            const uint64_t uc = u * c;
+            const uint64_t ud = u * d;
+            const uint64_t p0 = ud + k;
+            const uint64_t p1 = uc + (p0 >> 32);
+            digits_[i] = (p0 & 0xFFFFFFFF) | (p1 << 32);
+            k = p1 >> 32;
+        }
+        
+        if (k > 0)
+            PushBack(k);
+
+        return *this;
+    }
+
+    BigInteger& operator<<=(size_t shift) {
+        if (IsZero() || shift == 0) return *this;
+
+        size_t offset = shift / kTypeBit;
+        size_t interShift = shift % kTypeBit;
+        RAPIDJSON_ASSERT(count_ + offset <= kCapacity);
+
+        if (interShift == 0) {
+            std::memmove(&digits_[count_ - 1 + offset], &digits_[count_ - 1], count_ * sizeof(Type));
+            count_ += offset;
+        }
+        else {
+            digits_[count_] = 0;
+            for (size_t i = count_; i > 0; i--)
+                digits_[i + offset] = (digits_[i] << interShift) | (digits_[i - 1] >> (kTypeBit - interShift));
+            digits_[offset] = digits_[0] << interShift;
+            count_ += offset;
+            if (digits_[count_])
+                count_++;
+        }
+
+        std::memset(digits_, 0, offset * sizeof(Type));
+
+        return *this;
+    }
+
+    bool operator==(const BigInteger& rhs) const {
+        return count_ == rhs.count_ && std::memcmp(digits_, rhs.digits_, count_ * sizeof(Type)) == 0;
+    }
+
+    bool operator==(const Type rhs) const {
+        return count_ == 1 && digits_[0] == rhs;
+    }
+
+    BigInteger& MultiplyPow5(unsigned exp) {
+        static const uint32_t kPow5[12] = {
+            5,
+            5 * 5,
+            5 * 5 * 5,
+            5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5,
+            5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5 * 5
+        };
+        if (exp == 0) return *this;
+        for (; exp >= 27; exp -= 27) *this *= RAPIDJSON_UINT64_C2(0X6765C793, 0XFA10079D); // 5^27
+        for (; exp >= 13; exp -= 13) *this *= static_cast<uint32_t>(1220703125u); // 5^13
+        if (exp > 0)                 *this *= kPow5[exp - 1];
+        return *this;
+    }
+
+    // Compute absolute difference of this and rhs.
+    // Assume this != rhs
+    bool Difference(const BigInteger& rhs, BigInteger* out) const {
+        int cmp = Compare(rhs);
+        RAPIDJSON_ASSERT(cmp != 0);
+        const BigInteger *a, *b;  // Makes a > b
+        bool ret;
+        if (cmp < 0) { a = &rhs; b = this; ret = true; }
+        else         { a = this; b = &rhs; ret = false; }
+
+        Type borrow = 0;
+        for (size_t i = 0; i < a->count_; i++) {
+            Type d = a->digits_[i] - borrow;
+            if (i < b->count_)
+                d -= b->digits_[i];
+            borrow = (d > a->digits_[i]) ? 1 : 0;
+            out->digits_[i] = d;
+            if (d != 0)
+                out->count_ = i + 1;
+        }
+
+        return ret;
+    }
+
+    int Compare(const BigInteger& rhs) const {
+        if (count_ != rhs.count_)
+            return count_ < rhs.count_ ? -1 : 1;
+
+        for (size_t i = count_; i-- > 0;)
+            if (digits_[i] != rhs.digits_[i])
+                return digits_[i] < rhs.digits_[i] ? -1 : 1;
+
+        return 0;
+    }
+
+    size_t GetCount() const { return count_; }
+    Type GetDigit(size_t index) const { RAPIDJSON_ASSERT(index < count_); return digits_[index]; }
+    bool IsZero() const { return count_ == 1 && digits_[0] == 0; }
+
+private:
+    void AppendDecimal64(const char* begin, const char* end) {
+        uint64_t u = ParseUint64(begin, end);
+        if (IsZero())
+            *this = u;
+        else {
+            unsigned exp = static_cast<unsigned>(end - begin);
+            (MultiplyPow5(exp) <<= exp) += u;   // *this = *this * 10^exp + u
+        }
+    }
+
+    void PushBack(Type digit) {
+        RAPIDJSON_ASSERT(count_ < kCapacity);
+        digits_[count_++] = digit;
+    }
+
+    static uint64_t ParseUint64(const char* begin, const char* end) {
+        uint64_t r = 0;
+        for (const char* p = begin; p != end; ++p) {
+            RAPIDJSON_ASSERT(*p >= '0' && *p <= '9');
+            r = r * 10u + static_cast<unsigned>(*p - '0');
+        }
+        return r;
+    }
+
+    // Assume a * b + k < 2^128
+    static uint64_t MulAdd64(uint64_t a, uint64_t b, uint64_t k, uint64_t* outHigh) {
+#if defined(_MSC_VER) && defined(_M_AMD64)
+        uint64_t low = _umul128(a, b, outHigh) + k;
+        if (low < k)
+            (*outHigh)++;
+        return low;
+#elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__x86_64__)
+        __extension__ typedef unsigned __int128 uint128;
+        uint128 p = static_cast<uint128>(a) * static_cast<uint128>(b);
+        p += k;
+        *outHigh = static_cast<uint64_t>(p >> 64);
+        return static_cast<uint64_t>(p);
+#else
+        const uint64_t a0 = a & 0xFFFFFFFF, a1 = a >> 32, b0 = b & 0xFFFFFFFF, b1 = b >> 32;
+        uint64_t x0 = a0 * b0, x1 = a0 * b1, x2 = a1 * b0, x3 = a1 * b1;
+        x1 += (x0 >> 32); // can't give carry
+        x1 += x2;
+        if (x1 < x2)
+            x3 += (static_cast<uint64_t>(1) << 32);
+        uint64_t lo = (x1 << 32) + (x0 & 0xFFFFFFFF);
+        uint64_t hi = x3 + (x1 >> 32);
+
+        lo += k;
+        if (lo < k)
+            hi++;
+        *outHigh = hi;
+        return lo;
+#endif
+    }
+
+    static const size_t kBitCount = 3328;  // 64bit * 54 > 10^1000
+    static const size_t kCapacity = kBitCount / sizeof(Type);
+    static const size_t kTypeBit = sizeof(Type) * 8;
+
+    Type digits_[kCapacity];
+    size_t count_;
+};
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_BIGINTEGER_H_
diff --git a/external/rapidjson/internal/diyfp.h b/external/rapidjson/internal/diyfp.h
new file mode 100644
index 0000000..29abf80
--- /dev/null
+++ b/external/rapidjson/internal/diyfp.h
@@ -0,0 +1,258 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+// This is a C++ header-only implementation of Grisu2 algorithm from the publication:
+// Loitsch, Florian. "Printing floating-point numbers quickly and accurately with
+// integers." ACM Sigplan Notices 45.6 (2010): 233-243.
+
+#ifndef RAPIDJSON_DIYFP_H_
+#define RAPIDJSON_DIYFP_H_
+
+#include "../rapidjson.h"
+
+#if defined(_MSC_VER) && defined(_M_AMD64) && !defined(__INTEL_COMPILER)
+#include <intrin.h>
+#pragma intrinsic(_BitScanReverse64)
+#pragma intrinsic(_umul128)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+#endif
+
+struct DiyFp {
+    DiyFp() : f(), e() {}
+
+    DiyFp(uint64_t fp, int exp) : f(fp), e(exp) {}
+
+    explicit DiyFp(double d) {
+        union {
+            double d;
+            uint64_t u64;
+        } u = { d };
+
+        int biased_e = static_cast<int>((u.u64 & kDpExponentMask) >> kDpSignificandSize);
+        uint64_t significand = (u.u64 & kDpSignificandMask);
+        if (biased_e != 0) {
+            f = significand + kDpHiddenBit;
+            e = biased_e - kDpExponentBias;
+        } 
+        else {
+            f = significand;
+            e = kDpMinExponent + 1;
+        }
+    }
+
+    DiyFp operator-(const DiyFp& rhs) const {
+        return DiyFp(f - rhs.f, e);
+    }
+
+    DiyFp operator*(const DiyFp& rhs) const {
+#if defined(_MSC_VER) && defined(_M_AMD64)
+        uint64_t h;
+        uint64_t l = _umul128(f, rhs.f, &h);
+        if (l & (uint64_t(1) << 63)) // rounding
+            h++;
+        return DiyFp(h, e + rhs.e + 64);
+#elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__x86_64__)
+        __extension__ typedef unsigned __int128 uint128;
+        uint128 p = static_cast<uint128>(f) * static_cast<uint128>(rhs.f);
+        uint64_t h = static_cast<uint64_t>(p >> 64);
+        uint64_t l = static_cast<uint64_t>(p);
+        if (l & (uint64_t(1) << 63)) // rounding
+            h++;
+        return DiyFp(h, e + rhs.e + 64);
+#else
+        const uint64_t M32 = 0xFFFFFFFF;
+        const uint64_t a = f >> 32;
+        const uint64_t b = f & M32;
+        const uint64_t c = rhs.f >> 32;
+        const uint64_t d = rhs.f & M32;
+        const uint64_t ac = a * c;
+        const uint64_t bc = b * c;
+        const uint64_t ad = a * d;
+        const uint64_t bd = b * d;
+        uint64_t tmp = (bd >> 32) + (ad & M32) + (bc & M32);
+        tmp += 1U << 31;  /// mult_round
+        return DiyFp(ac + (ad >> 32) + (bc >> 32) + (tmp >> 32), e + rhs.e + 64);
+#endif
+    }
+
+    DiyFp Normalize() const {
+#if defined(_MSC_VER) && defined(_M_AMD64)
+        unsigned long index;
+        _BitScanReverse64(&index, f);
+        return DiyFp(f << (63 - index), e - (63 - index));
+#elif defined(__GNUC__) && __GNUC__ >= 4
+        int s = __builtin_clzll(f);
+        return DiyFp(f << s, e - s);
+#else
+        DiyFp res = *this;
+        while (!(res.f & (static_cast<uint64_t>(1) << 63))) {
+            res.f <<= 1;
+            res.e--;
+        }
+        return res;
+#endif
+    }
+
+    DiyFp NormalizeBoundary() const {
+        DiyFp res = *this;
+        while (!(res.f & (kDpHiddenBit << 1))) {
+            res.f <<= 1;
+            res.e--;
+        }
+        res.f <<= (kDiySignificandSize - kDpSignificandSize - 2);
+        res.e = res.e - (kDiySignificandSize - kDpSignificandSize - 2);
+        return res;
+    }
+
+    void NormalizedBoundaries(DiyFp* minus, DiyFp* plus) const {
+        DiyFp pl = DiyFp((f << 1) + 1, e - 1).NormalizeBoundary();
+        DiyFp mi = (f == kDpHiddenBit) ? DiyFp((f << 2) - 1, e - 2) : DiyFp((f << 1) - 1, e - 1);
+        mi.f <<= mi.e - pl.e;
+        mi.e = pl.e;
+        *plus = pl;
+        *minus = mi;
+    }
+
+    double ToDouble() const {
+        union {
+            double d;
+            uint64_t u64;
+        }u;
+        const uint64_t be = (e == kDpDenormalExponent && (f & kDpHiddenBit) == 0) ? 0 : 
+            static_cast<uint64_t>(e + kDpExponentBias);
+        u.u64 = (f & kDpSignificandMask) | (be << kDpSignificandSize);
+        return u.d;
+    }
+
+    static const int kDiySignificandSize = 64;
+    static const int kDpSignificandSize = 52;
+    static const int kDpExponentBias = 0x3FF + kDpSignificandSize;
+    static const int kDpMaxExponent = 0x7FF - kDpExponentBias;
+    static const int kDpMinExponent = -kDpExponentBias;
+    static const int kDpDenormalExponent = -kDpExponentBias + 1;
+    static const uint64_t kDpExponentMask = RAPIDJSON_UINT64_C2(0x7FF00000, 0x00000000);
+    static const uint64_t kDpSignificandMask = RAPIDJSON_UINT64_C2(0x000FFFFF, 0xFFFFFFFF);
+    static const uint64_t kDpHiddenBit = RAPIDJSON_UINT64_C2(0x00100000, 0x00000000);
+
+    uint64_t f;
+    int e;
+};
+
+inline DiyFp GetCachedPowerByIndex(size_t index) {
+    // 10^-348, 10^-340, ..., 10^340
+    static const uint64_t kCachedPowers_F[] = {
+        RAPIDJSON_UINT64_C2(0xfa8fd5a0, 0x081c0288), RAPIDJSON_UINT64_C2(0xbaaee17f, 0xa23ebf76),
+        RAPIDJSON_UINT64_C2(0x8b16fb20, 0x3055ac76), RAPIDJSON_UINT64_C2(0xcf42894a, 0x5dce35ea),
+        RAPIDJSON_UINT64_C2(0x9a6bb0aa, 0x55653b2d), RAPIDJSON_UINT64_C2(0xe61acf03, 0x3d1a45df),
+        RAPIDJSON_UINT64_C2(0xab70fe17, 0xc79ac6ca), RAPIDJSON_UINT64_C2(0xff77b1fc, 0xbebcdc4f),
+        RAPIDJSON_UINT64_C2(0xbe5691ef, 0x416bd60c), RAPIDJSON_UINT64_C2(0x8dd01fad, 0x907ffc3c),
+        RAPIDJSON_UINT64_C2(0xd3515c28, 0x31559a83), RAPIDJSON_UINT64_C2(0x9d71ac8f, 0xada6c9b5),
+        RAPIDJSON_UINT64_C2(0xea9c2277, 0x23ee8bcb), RAPIDJSON_UINT64_C2(0xaecc4991, 0x4078536d),
+        RAPIDJSON_UINT64_C2(0x823c1279, 0x5db6ce57), RAPIDJSON_UINT64_C2(0xc2109436, 0x4dfb5637),
+        RAPIDJSON_UINT64_C2(0x9096ea6f, 0x3848984f), RAPIDJSON_UINT64_C2(0xd77485cb, 0x25823ac7),
+        RAPIDJSON_UINT64_C2(0xa086cfcd, 0x97bf97f4), RAPIDJSON_UINT64_C2(0xef340a98, 0x172aace5),
+        RAPIDJSON_UINT64_C2(0xb23867fb, 0x2a35b28e), RAPIDJSON_UINT64_C2(0x84c8d4df, 0xd2c63f3b),
+        RAPIDJSON_UINT64_C2(0xc5dd4427, 0x1ad3cdba), RAPIDJSON_UINT64_C2(0x936b9fce, 0xbb25c996),
+        RAPIDJSON_UINT64_C2(0xdbac6c24, 0x7d62a584), RAPIDJSON_UINT64_C2(0xa3ab6658, 0x0d5fdaf6),
+        RAPIDJSON_UINT64_C2(0xf3e2f893, 0xdec3f126), RAPIDJSON_UINT64_C2(0xb5b5ada8, 0xaaff80b8),
+        RAPIDJSON_UINT64_C2(0x87625f05, 0x6c7c4a8b), RAPIDJSON_UINT64_C2(0xc9bcff60, 0x34c13053),
+        RAPIDJSON_UINT64_C2(0x964e858c, 0x91ba2655), RAPIDJSON_UINT64_C2(0xdff97724, 0x70297ebd),
+        RAPIDJSON_UINT64_C2(0xa6dfbd9f, 0xb8e5b88f), RAPIDJSON_UINT64_C2(0xf8a95fcf, 0x88747d94),
+        RAPIDJSON_UINT64_C2(0xb9447093, 0x8fa89bcf), RAPIDJSON_UINT64_C2(0x8a08f0f8, 0xbf0f156b),
+        RAPIDJSON_UINT64_C2(0xcdb02555, 0x653131b6), RAPIDJSON_UINT64_C2(0x993fe2c6, 0xd07b7fac),
+        RAPIDJSON_UINT64_C2(0xe45c10c4, 0x2a2b3b06), RAPIDJSON_UINT64_C2(0xaa242499, 0x697392d3),
+        RAPIDJSON_UINT64_C2(0xfd87b5f2, 0x8300ca0e), RAPIDJSON_UINT64_C2(0xbce50864, 0x92111aeb),
+        RAPIDJSON_UINT64_C2(0x8cbccc09, 0x6f5088cc), RAPIDJSON_UINT64_C2(0xd1b71758, 0xe219652c),
+        RAPIDJSON_UINT64_C2(0x9c400000, 0x00000000), RAPIDJSON_UINT64_C2(0xe8d4a510, 0x00000000),
+        RAPIDJSON_UINT64_C2(0xad78ebc5, 0xac620000), RAPIDJSON_UINT64_C2(0x813f3978, 0xf8940984),
+        RAPIDJSON_UINT64_C2(0xc097ce7b, 0xc90715b3), RAPIDJSON_UINT64_C2(0x8f7e32ce, 0x7bea5c70),
+        RAPIDJSON_UINT64_C2(0xd5d238a4, 0xabe98068), RAPIDJSON_UINT64_C2(0x9f4f2726, 0x179a2245),
+        RAPIDJSON_UINT64_C2(0xed63a231, 0xd4c4fb27), RAPIDJSON_UINT64_C2(0xb0de6538, 0x8cc8ada8),
+        RAPIDJSON_UINT64_C2(0x83c7088e, 0x1aab65db), RAPIDJSON_UINT64_C2(0xc45d1df9, 0x42711d9a),
+        RAPIDJSON_UINT64_C2(0x924d692c, 0xa61be758), RAPIDJSON_UINT64_C2(0xda01ee64, 0x1a708dea),
+        RAPIDJSON_UINT64_C2(0xa26da399, 0x9aef774a), RAPIDJSON_UINT64_C2(0xf209787b, 0xb47d6b85),
+        RAPIDJSON_UINT64_C2(0xb454e4a1, 0x79dd1877), RAPIDJSON_UINT64_C2(0x865b8692, 0x5b9bc5c2),
+        RAPIDJSON_UINT64_C2(0xc83553c5, 0xc8965d3d), RAPIDJSON_UINT64_C2(0x952ab45c, 0xfa97a0b3),
+        RAPIDJSON_UINT64_C2(0xde469fbd, 0x99a05fe3), RAPIDJSON_UINT64_C2(0xa59bc234, 0xdb398c25),
+        RAPIDJSON_UINT64_C2(0xf6c69a72, 0xa3989f5c), RAPIDJSON_UINT64_C2(0xb7dcbf53, 0x54e9bece),
+        RAPIDJSON_UINT64_C2(0x88fcf317, 0xf22241e2), RAPIDJSON_UINT64_C2(0xcc20ce9b, 0xd35c78a5),
+        RAPIDJSON_UINT64_C2(0x98165af3, 0x7b2153df), RAPIDJSON_UINT64_C2(0xe2a0b5dc, 0x971f303a),
+        RAPIDJSON_UINT64_C2(0xa8d9d153, 0x5ce3b396), RAPIDJSON_UINT64_C2(0xfb9b7cd9, 0xa4a7443c),
+        RAPIDJSON_UINT64_C2(0xbb764c4c, 0xa7a44410), RAPIDJSON_UINT64_C2(0x8bab8eef, 0xb6409c1a),
+        RAPIDJSON_UINT64_C2(0xd01fef10, 0xa657842c), RAPIDJSON_UINT64_C2(0x9b10a4e5, 0xe9913129),
+        RAPIDJSON_UINT64_C2(0xe7109bfb, 0xa19c0c9d), RAPIDJSON_UINT64_C2(0xac2820d9, 0x623bf429),
+        RAPIDJSON_UINT64_C2(0x80444b5e, 0x7aa7cf85), RAPIDJSON_UINT64_C2(0xbf21e440, 0x03acdd2d),
+        RAPIDJSON_UINT64_C2(0x8e679c2f, 0x5e44ff8f), RAPIDJSON_UINT64_C2(0xd433179d, 0x9c8cb841),
+        RAPIDJSON_UINT64_C2(0x9e19db92, 0xb4e31ba9), RAPIDJSON_UINT64_C2(0xeb96bf6e, 0xbadf77d9),
+        RAPIDJSON_UINT64_C2(0xaf87023b, 0x9bf0ee6b)
+    };
+    static const int16_t kCachedPowers_E[] = {
+        -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007,  -980,
+        -954,  -927,  -901,  -874,  -847,  -821,  -794,  -768,  -741,  -715,
+        -688,  -661,  -635,  -608,  -582,  -555,  -529,  -502,  -475,  -449,
+        -422,  -396,  -369,  -343,  -316,  -289,  -263,  -236,  -210,  -183,
+        -157,  -130,  -103,   -77,   -50,   -24,     3,    30,    56,    83,
+        109,   136,   162,   189,   216,   242,   269,   295,   322,   348,
+        375,   402,   428,   455,   481,   508,   534,   561,   588,   614,
+        641,   667,   694,   720,   747,   774,   800,   827,   853,   880,
+        907,   933,   960,   986,  1013,  1039,  1066
+    };
+    return DiyFp(kCachedPowers_F[index], kCachedPowers_E[index]);
+}
+    
+inline DiyFp GetCachedPower(int e, int* K) {
+
+    //int k = static_cast<int>(ceil((-61 - e) * 0.30102999566398114)) + 374;
+    double dk = (-61 - e) * 0.30102999566398114 + 347;  // dk must be positive, so can do ceiling in positive
+    int k = static_cast<int>(dk);
+    if (dk - k > 0.0)
+        k++;
+
+    unsigned index = static_cast<unsigned>((k >> 3) + 1);
+    *K = -(-348 + static_cast<int>(index << 3));    // decimal exponent no need lookup table
+
+    return GetCachedPowerByIndex(index);
+}
+
+inline DiyFp GetCachedPower10(int exp, int *outExp) {
+     unsigned index = (static_cast<unsigned>(exp) + 348u) / 8u;
+     *outExp = -348 + static_cast<int>(index) * 8;
+     return GetCachedPowerByIndex(index);
+ }
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+RAPIDJSON_DIAG_OFF(padded)
+#endif
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_DIYFP_H_
diff --git a/external/rapidjson/internal/dtoa.h b/external/rapidjson/internal/dtoa.h
new file mode 100644
index 0000000..bf2e9b2
--- /dev/null
+++ b/external/rapidjson/internal/dtoa.h
@@ -0,0 +1,245 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+// This is a C++ header-only implementation of Grisu2 algorithm from the publication:
+// Loitsch, Florian. "Printing floating-point numbers quickly and accurately with
+// integers." ACM Sigplan Notices 45.6 (2010): 233-243.
+
+#ifndef RAPIDJSON_DTOA_
+#define RAPIDJSON_DTOA_
+
+#include "itoa.h" // GetDigitsLut()
+#include "diyfp.h"
+#include "ieee754.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+RAPIDJSON_DIAG_OFF(array-bounds) // some gcc versions generate wrong warnings https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59124
+#endif
+
+inline void GrisuRound(char* buffer, int len, uint64_t delta, uint64_t rest, uint64_t ten_kappa, uint64_t wp_w) {
+    while (rest < wp_w && delta - rest >= ten_kappa &&
+           (rest + ten_kappa < wp_w ||  /// closer
+            wp_w - rest > rest + ten_kappa - wp_w)) {
+        buffer[len - 1]--;
+        rest += ten_kappa;
+    }
+}
+
+inline int CountDecimalDigit32(uint32_t n) {
+    // Simple pure C++ implementation was faster than __builtin_clz version in this situation.
+    if (n < 10) return 1;
+    if (n < 100) return 2;
+    if (n < 1000) return 3;
+    if (n < 10000) return 4;
+    if (n < 100000) return 5;
+    if (n < 1000000) return 6;
+    if (n < 10000000) return 7;
+    if (n < 100000000) return 8;
+    // Will not reach 10 digits in DigitGen()
+    //if (n < 1000000000) return 9;
+    //return 10;
+    return 9;
+}
+
+inline void DigitGen(const DiyFp& W, const DiyFp& Mp, uint64_t delta, char* buffer, int* len, int* K) {
+    static const uint32_t kPow10[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000, 1000000000 };
+    const DiyFp one(uint64_t(1) << -Mp.e, Mp.e);
+    const DiyFp wp_w = Mp - W;
+    uint32_t p1 = static_cast<uint32_t>(Mp.f >> -one.e);
+    uint64_t p2 = Mp.f & (one.f - 1);
+    int kappa = CountDecimalDigit32(p1); // kappa in [0, 9]
+    *len = 0;
+
+    while (kappa > 0) {
+        uint32_t d = 0;
+        switch (kappa) {
+            case  9: d = p1 /  100000000; p1 %=  100000000; break;
+            case  8: d = p1 /   10000000; p1 %=   10000000; break;
+            case  7: d = p1 /    1000000; p1 %=    1000000; break;
+            case  6: d = p1 /     100000; p1 %=     100000; break;
+            case  5: d = p1 /      10000; p1 %=      10000; break;
+            case  4: d = p1 /       1000; p1 %=       1000; break;
+            case  3: d = p1 /        100; p1 %=        100; break;
+            case  2: d = p1 /         10; p1 %=         10; break;
+            case  1: d = p1;              p1 =           0; break;
+            default:;
+        }
+        if (d || *len)
+            buffer[(*len)++] = static_cast<char>('0' + static_cast<char>(d));
+        kappa--;
+        uint64_t tmp = (static_cast<uint64_t>(p1) << -one.e) + p2;
+        if (tmp <= delta) {
+            *K += kappa;
+            GrisuRound(buffer, *len, delta, tmp, static_cast<uint64_t>(kPow10[kappa]) << -one.e, wp_w.f);
+            return;
+        }
+    }
+
+    // kappa = 0
+    for (;;) {
+        p2 *= 10;
+        delta *= 10;
+        char d = static_cast<char>(p2 >> -one.e);
+        if (d || *len)
+            buffer[(*len)++] = static_cast<char>('0' + d);
+        p2 &= one.f - 1;
+        kappa--;
+        if (p2 < delta) {
+            *K += kappa;
+            int index = -kappa;
+            GrisuRound(buffer, *len, delta, p2, one.f, wp_w.f * (index < 9 ? kPow10[index] : 0));
+            return;
+        }
+    }
+}
+
+inline void Grisu2(double value, char* buffer, int* length, int* K) {
+    const DiyFp v(value);
+    DiyFp w_m, w_p;
+    v.NormalizedBoundaries(&w_m, &w_p);
+
+    const DiyFp c_mk = GetCachedPower(w_p.e, K);
+    const DiyFp W = v.Normalize() * c_mk;
+    DiyFp Wp = w_p * c_mk;
+    DiyFp Wm = w_m * c_mk;
+    Wm.f++;
+    Wp.f--;
+    DigitGen(W, Wp, Wp.f - Wm.f, buffer, length, K);
+}
+
+inline char* WriteExponent(int K, char* buffer) {
+    if (K < 0) {
+        *buffer++ = '-';
+        K = -K;
+    }
+
+    if (K >= 100) {
+        *buffer++ = static_cast<char>('0' + static_cast<char>(K / 100));
+        K %= 100;
+        const char* d = GetDigitsLut() + K * 2;
+        *buffer++ = d[0];
+        *buffer++ = d[1];
+    }
+    else if (K >= 10) {
+        const char* d = GetDigitsLut() + K * 2;
+        *buffer++ = d[0];
+        *buffer++ = d[1];
+    }
+    else
+        *buffer++ = static_cast<char>('0' + static_cast<char>(K));
+
+    return buffer;
+}
+
+inline char* Prettify(char* buffer, int length, int k, int maxDecimalPlaces) {
+    const int kk = length + k;  // 10^(kk-1) <= v < 10^kk
+
+    if (0 <= k && kk <= 21) {
+        // 1234e7 -> 12340000000
+        for (int i = length; i < kk; i++)
+            buffer[i] = '0';
+        buffer[kk] = '.';
+        buffer[kk + 1] = '0';
+        return &buffer[kk + 2];
+    }
+    else if (0 < kk && kk <= 21) {
+        // 1234e-2 -> 12.34
+        std::memmove(&buffer[kk + 1], &buffer[kk], static_cast<size_t>(length - kk));
+        buffer[kk] = '.';
+        if (0 > k + maxDecimalPlaces) {
+            // When maxDecimalPlaces = 2, 1.2345 -> 1.23, 1.102 -> 1.1
+            // Remove extra trailing zeros (at least one) after truncation.
+            for (int i = kk + maxDecimalPlaces; i > kk + 1; i--)
+                if (buffer[i] != '0')
+                    return &buffer[i + 1];
+            return &buffer[kk + 2]; // Reserve one zero
+        }
+        else
+            return &buffer[length + 1];
+    }
+    else if (-6 < kk && kk <= 0) {
+        // 1234e-6 -> 0.001234
+        const int offset = 2 - kk;
+        std::memmove(&buffer[offset], &buffer[0], static_cast<size_t>(length));
+        buffer[0] = '0';
+        buffer[1] = '.';
+        for (int i = 2; i < offset; i++)
+            buffer[i] = '0';
+        if (length - kk > maxDecimalPlaces) {
+            // When maxDecimalPlaces = 2, 0.123 -> 0.12, 0.102 -> 0.1
+            // Remove extra trailing zeros (at least one) after truncation.
+            for (int i = maxDecimalPlaces + 1; i > 2; i--)
+                if (buffer[i] != '0')
+                    return &buffer[i + 1];
+            return &buffer[3]; // Reserve one zero
+        }
+        else
+            return &buffer[length + offset];
+    }
+    else if (kk < -maxDecimalPlaces) {
+        // Truncate to zero
+        buffer[0] = '0';
+        buffer[1] = '.';
+        buffer[2] = '0';
+        return &buffer[3];
+    }
+    else if (length == 1) {
+        // 1e30
+        buffer[1] = 'e';
+        return WriteExponent(kk - 1, &buffer[2]);
+    }
+    else {
+        // 1234e30 -> 1.234e33
+        std::memmove(&buffer[2], &buffer[1], static_cast<size_t>(length - 1));
+        buffer[1] = '.';
+        buffer[length + 1] = 'e';
+        return WriteExponent(kk - 1, &buffer[0 + length + 2]);
+    }
+}
+
+inline char* dtoa(double value, char* buffer, int maxDecimalPlaces = 324) {
+    RAPIDJSON_ASSERT(maxDecimalPlaces >= 1);
+    Double d(value);
+    if (d.IsZero()) {
+        if (d.Sign())
+            *buffer++ = '-';     // -0.0, Issue #289
+        buffer[0] = '0';
+        buffer[1] = '.';
+        buffer[2] = '0';
+        return &buffer[3];
+    }
+    else {
+        if (value < 0) {
+            *buffer++ = '-';
+            value = -value;
+        }
+        int length, K;
+        Grisu2(value, buffer, &length, &K);
+        return Prettify(buffer, length, K, maxDecimalPlaces);
+    }
+}
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_POP
+#endif
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_DTOA_
diff --git a/external/rapidjson/internal/ieee754.h b/external/rapidjson/internal/ieee754.h
new file mode 100644
index 0000000..c2684ba
--- /dev/null
+++ b/external/rapidjson/internal/ieee754.h
@@ -0,0 +1,78 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_IEEE754_
+#define RAPIDJSON_IEEE754_
+
+#include "../rapidjson.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+class Double {
+public:
+    Double() {}
+    Double(double d) : d_(d) {}
+    Double(uint64_t u) : u_(u) {}
+
+    double Value() const { return d_; }
+    uint64_t Uint64Value() const { return u_; }
+
+    double NextPositiveDouble() const {
+        RAPIDJSON_ASSERT(!Sign());
+        return Double(u_ + 1).Value();
+    }
+
+    bool Sign() const { return (u_ & kSignMask) != 0; }
+    uint64_t Significand() const { return u_ & kSignificandMask; }
+    int Exponent() const { return static_cast<int>(((u_ & kExponentMask) >> kSignificandSize) - kExponentBias); }
+
+    bool IsNan() const { return (u_ & kExponentMask) == kExponentMask && Significand() != 0; }
+    bool IsInf() const { return (u_ & kExponentMask) == kExponentMask && Significand() == 0; }
+    bool IsNanOrInf() const { return (u_ & kExponentMask) == kExponentMask; }
+    bool IsNormal() const { return (u_ & kExponentMask) != 0 || Significand() == 0; }
+    bool IsZero() const { return (u_ & (kExponentMask | kSignificandMask)) == 0; }
+
+    uint64_t IntegerSignificand() const { return IsNormal() ? Significand() | kHiddenBit : Significand(); }
+    int IntegerExponent() const { return (IsNormal() ? Exponent() : kDenormalExponent) - kSignificandSize; }
+    uint64_t ToBias() const { return (u_ & kSignMask) ? ~u_ + 1 : u_ | kSignMask; }
+
+    static int EffectiveSignificandSize(int order) {
+        if (order >= -1021)
+            return 53;
+        else if (order <= -1074)
+            return 0;
+        else
+            return order + 1074;
+    }
+
+private:
+    static const int kSignificandSize = 52;
+    static const int kExponentBias = 0x3FF;
+    static const int kDenormalExponent = 1 - kExponentBias;
+    static const uint64_t kSignMask = RAPIDJSON_UINT64_C2(0x80000000, 0x00000000);
+    static const uint64_t kExponentMask = RAPIDJSON_UINT64_C2(0x7FF00000, 0x00000000);
+    static const uint64_t kSignificandMask = RAPIDJSON_UINT64_C2(0x000FFFFF, 0xFFFFFFFF);
+    static const uint64_t kHiddenBit = RAPIDJSON_UINT64_C2(0x00100000, 0x00000000);
+
+    union {
+        double d_;
+        uint64_t u_;
+    };
+};
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_IEEE754_
diff --git a/external/rapidjson/internal/itoa.h b/external/rapidjson/internal/itoa.h
new file mode 100644
index 0000000..01a4e7e
--- /dev/null
+++ b/external/rapidjson/internal/itoa.h
@@ -0,0 +1,304 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_ITOA_
+#define RAPIDJSON_ITOA_
+
+#include "../rapidjson.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+inline const char* GetDigitsLut() {
+    static const char cDigitsLut[200] = {
+        '0','0','0','1','0','2','0','3','0','4','0','5','0','6','0','7','0','8','0','9',
+        '1','0','1','1','1','2','1','3','1','4','1','5','1','6','1','7','1','8','1','9',
+        '2','0','2','1','2','2','2','3','2','4','2','5','2','6','2','7','2','8','2','9',
+        '3','0','3','1','3','2','3','3','3','4','3','5','3','6','3','7','3','8','3','9',
+        '4','0','4','1','4','2','4','3','4','4','4','5','4','6','4','7','4','8','4','9',
+        '5','0','5','1','5','2','5','3','5','4','5','5','5','6','5','7','5','8','5','9',
+        '6','0','6','1','6','2','6','3','6','4','6','5','6','6','6','7','6','8','6','9',
+        '7','0','7','1','7','2','7','3','7','4','7','5','7','6','7','7','7','8','7','9',
+        '8','0','8','1','8','2','8','3','8','4','8','5','8','6','8','7','8','8','8','9',
+        '9','0','9','1','9','2','9','3','9','4','9','5','9','6','9','7','9','8','9','9'
+    };
+    return cDigitsLut;
+}
+
+inline char* u32toa(uint32_t value, char* buffer) {
+    const char* cDigitsLut = GetDigitsLut();
+
+    if (value < 10000) {
+        const uint32_t d1 = (value / 100) << 1;
+        const uint32_t d2 = (value % 100) << 1;
+        
+        if (value >= 1000)
+            *buffer++ = cDigitsLut[d1];
+        if (value >= 100)
+            *buffer++ = cDigitsLut[d1 + 1];
+        if (value >= 10)
+            *buffer++ = cDigitsLut[d2];
+        *buffer++ = cDigitsLut[d2 + 1];
+    }
+    else if (value < 100000000) {
+        // value = bbbbcccc
+        const uint32_t b = value / 10000;
+        const uint32_t c = value % 10000;
+        
+        const uint32_t d1 = (b / 100) << 1;
+        const uint32_t d2 = (b % 100) << 1;
+        
+        const uint32_t d3 = (c / 100) << 1;
+        const uint32_t d4 = (c % 100) << 1;
+        
+        if (value >= 10000000)
+            *buffer++ = cDigitsLut[d1];
+        if (value >= 1000000)
+            *buffer++ = cDigitsLut[d1 + 1];
+        if (value >= 100000)
+            *buffer++ = cDigitsLut[d2];
+        *buffer++ = cDigitsLut[d2 + 1];
+        
+        *buffer++ = cDigitsLut[d3];
+        *buffer++ = cDigitsLut[d3 + 1];
+        *buffer++ = cDigitsLut[d4];
+        *buffer++ = cDigitsLut[d4 + 1];
+    }
+    else {
+        // value = aabbbbcccc in decimal
+        
+        const uint32_t a = value / 100000000; // 1 to 42
+        value %= 100000000;
+        
+        if (a >= 10) {
+            const unsigned i = a << 1;
+            *buffer++ = cDigitsLut[i];
+            *buffer++ = cDigitsLut[i + 1];
+        }
+        else
+            *buffer++ = static_cast<char>('0' + static_cast<char>(a));
+
+        const uint32_t b = value / 10000; // 0 to 9999
+        const uint32_t c = value % 10000; // 0 to 9999
+        
+        const uint32_t d1 = (b / 100) << 1;
+        const uint32_t d2 = (b % 100) << 1;
+        
+        const uint32_t d3 = (c / 100) << 1;
+        const uint32_t d4 = (c % 100) << 1;
+        
+        *buffer++ = cDigitsLut[d1];
+        *buffer++ = cDigitsLut[d1 + 1];
+        *buffer++ = cDigitsLut[d2];
+        *buffer++ = cDigitsLut[d2 + 1];
+        *buffer++ = cDigitsLut[d3];
+        *buffer++ = cDigitsLut[d3 + 1];
+        *buffer++ = cDigitsLut[d4];
+        *buffer++ = cDigitsLut[d4 + 1];
+    }
+    return buffer;
+}
+
+inline char* i32toa(int32_t value, char* buffer) {
+    uint32_t u = static_cast<uint32_t>(value);
+    if (value < 0) {
+        *buffer++ = '-';
+        u = ~u + 1;
+    }
+
+    return u32toa(u, buffer);
+}
+
+inline char* u64toa(uint64_t value, char* buffer) {
+    const char* cDigitsLut = GetDigitsLut();
+    const uint64_t  kTen8 = 100000000;
+    const uint64_t  kTen9 = kTen8 * 10;
+    const uint64_t kTen10 = kTen8 * 100;
+    const uint64_t kTen11 = kTen8 * 1000;
+    const uint64_t kTen12 = kTen8 * 10000;
+    const uint64_t kTen13 = kTen8 * 100000;
+    const uint64_t kTen14 = kTen8 * 1000000;
+    const uint64_t kTen15 = kTen8 * 10000000;
+    const uint64_t kTen16 = kTen8 * kTen8;
+    
+    if (value < kTen8) {
+        uint32_t v = static_cast<uint32_t>(value);
+        if (v < 10000) {
+            const uint32_t d1 = (v / 100) << 1;
+            const uint32_t d2 = (v % 100) << 1;
+            
+            if (v >= 1000)
+                *buffer++ = cDigitsLut[d1];
+            if (v >= 100)
+                *buffer++ = cDigitsLut[d1 + 1];
+            if (v >= 10)
+                *buffer++ = cDigitsLut[d2];
+            *buffer++ = cDigitsLut[d2 + 1];
+        }
+        else {
+            // value = bbbbcccc
+            const uint32_t b = v / 10000;
+            const uint32_t c = v % 10000;
+            
+            const uint32_t d1 = (b / 100) << 1;
+            const uint32_t d2 = (b % 100) << 1;
+            
+            const uint32_t d3 = (c / 100) << 1;
+            const uint32_t d4 = (c % 100) << 1;
+            
+            if (value >= 10000000)
+                *buffer++ = cDigitsLut[d1];
+            if (value >= 1000000)
+                *buffer++ = cDigitsLut[d1 + 1];
+            if (value >= 100000)
+                *buffer++ = cDigitsLut[d2];
+            *buffer++ = cDigitsLut[d2 + 1];
+            
+            *buffer++ = cDigitsLut[d3];
+            *buffer++ = cDigitsLut[d3 + 1];
+            *buffer++ = cDigitsLut[d4];
+            *buffer++ = cDigitsLut[d4 + 1];
+        }
+    }
+    else if (value < kTen16) {
+        const uint32_t v0 = static_cast<uint32_t>(value / kTen8);
+        const uint32_t v1 = static_cast<uint32_t>(value % kTen8);
+        
+        const uint32_t b0 = v0 / 10000;
+        const uint32_t c0 = v0 % 10000;
+        
+        const uint32_t d1 = (b0 / 100) << 1;
+        const uint32_t d2 = (b0 % 100) << 1;
+        
+        const uint32_t d3 = (c0 / 100) << 1;
+        const uint32_t d4 = (c0 % 100) << 1;
+
+        const uint32_t b1 = v1 / 10000;
+        const uint32_t c1 = v1 % 10000;
+        
+        const uint32_t d5 = (b1 / 100) << 1;
+        const uint32_t d6 = (b1 % 100) << 1;
+        
+        const uint32_t d7 = (c1 / 100) << 1;
+        const uint32_t d8 = (c1 % 100) << 1;
+
+        if (value >= kTen15)
+            *buffer++ = cDigitsLut[d1];
+        if (value >= kTen14)
+            *buffer++ = cDigitsLut[d1 + 1];
+        if (value >= kTen13)
+            *buffer++ = cDigitsLut[d2];
+        if (value >= kTen12)
+            *buffer++ = cDigitsLut[d2 + 1];
+        if (value >= kTen11)
+            *buffer++ = cDigitsLut[d3];
+        if (value >= kTen10)
+            *buffer++ = cDigitsLut[d3 + 1];
+        if (value >= kTen9)
+            *buffer++ = cDigitsLut[d4];
+        if (value >= kTen8)
+            *buffer++ = cDigitsLut[d4 + 1];
+        
+        *buffer++ = cDigitsLut[d5];
+        *buffer++ = cDigitsLut[d5 + 1];
+        *buffer++ = cDigitsLut[d6];
+        *buffer++ = cDigitsLut[d6 + 1];
+        *buffer++ = cDigitsLut[d7];
+        *buffer++ = cDigitsLut[d7 + 1];
+        *buffer++ = cDigitsLut[d8];
+        *buffer++ = cDigitsLut[d8 + 1];
+    }
+    else {
+        const uint32_t a = static_cast<uint32_t>(value / kTen16); // 1 to 1844
+        value %= kTen16;
+        
+        if (a < 10)
+            *buffer++ = static_cast<char>('0' + static_cast<char>(a));
+        else if (a < 100) {
+            const uint32_t i = a << 1;
+            *buffer++ = cDigitsLut[i];
+            *buffer++ = cDigitsLut[i + 1];
+        }
+        else if (a < 1000) {
+            *buffer++ = static_cast<char>('0' + static_cast<char>(a / 100));
+            
+            const uint32_t i = (a % 100) << 1;
+            *buffer++ = cDigitsLut[i];
+            *buffer++ = cDigitsLut[i + 1];
+        }
+        else {
+            const uint32_t i = (a / 100) << 1;
+            const uint32_t j = (a % 100) << 1;
+            *buffer++ = cDigitsLut[i];
+            *buffer++ = cDigitsLut[i + 1];
+            *buffer++ = cDigitsLut[j];
+            *buffer++ = cDigitsLut[j + 1];
+        }
+        
+        const uint32_t v0 = static_cast<uint32_t>(value / kTen8);
+        const uint32_t v1 = static_cast<uint32_t>(value % kTen8);
+        
+        const uint32_t b0 = v0 / 10000;
+        const uint32_t c0 = v0 % 10000;
+        
+        const uint32_t d1 = (b0 / 100) << 1;
+        const uint32_t d2 = (b0 % 100) << 1;
+        
+        const uint32_t d3 = (c0 / 100) << 1;
+        const uint32_t d4 = (c0 % 100) << 1;
+        
+        const uint32_t b1 = v1 / 10000;
+        const uint32_t c1 = v1 % 10000;
+        
+        const uint32_t d5 = (b1 / 100) << 1;
+        const uint32_t d6 = (b1 % 100) << 1;
+        
+        const uint32_t d7 = (c1 / 100) << 1;
+        const uint32_t d8 = (c1 % 100) << 1;
+        
+        *buffer++ = cDigitsLut[d1];
+        *buffer++ = cDigitsLut[d1 + 1];
+        *buffer++ = cDigitsLut[d2];
+        *buffer++ = cDigitsLut[d2 + 1];
+        *buffer++ = cDigitsLut[d3];
+        *buffer++ = cDigitsLut[d3 + 1];
+        *buffer++ = cDigitsLut[d4];
+        *buffer++ = cDigitsLut[d4 + 1];
+        *buffer++ = cDigitsLut[d5];
+        *buffer++ = cDigitsLut[d5 + 1];
+        *buffer++ = cDigitsLut[d6];
+        *buffer++ = cDigitsLut[d6 + 1];
+        *buffer++ = cDigitsLut[d7];
+        *buffer++ = cDigitsLut[d7 + 1];
+        *buffer++ = cDigitsLut[d8];
+        *buffer++ = cDigitsLut[d8 + 1];
+    }
+    
+    return buffer;
+}
+
+inline char* i64toa(int64_t value, char* buffer) {
+    uint64_t u = static_cast<uint64_t>(value);
+    if (value < 0) {
+        *buffer++ = '-';
+        u = ~u + 1;
+    }
+
+    return u64toa(u, buffer);
+}
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_ITOA_
diff --git a/external/rapidjson/internal/meta.h b/external/rapidjson/internal/meta.h
new file mode 100644
index 0000000..5a9aaa4
--- /dev/null
+++ b/external/rapidjson/internal/meta.h
@@ -0,0 +1,181 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_INTERNAL_META_H_
+#define RAPIDJSON_INTERNAL_META_H_
+
+#include "../rapidjson.h"
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+#if defined(_MSC_VER)
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(6334)
+#endif
+
+#if RAPIDJSON_HAS_CXX11_TYPETRAITS
+#include <type_traits>
+#endif
+
+//@cond RAPIDJSON_INTERNAL
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+// Helper to wrap/convert arbitrary types to void, useful for arbitrary type matching
+template <typename T> struct Void { typedef void Type; };
+
+///////////////////////////////////////////////////////////////////////////////
+// BoolType, TrueType, FalseType
+//
+template <bool Cond> struct BoolType {
+    static const bool Value = Cond;
+    typedef BoolType Type;
+};
+typedef BoolType<true> TrueType;
+typedef BoolType<false> FalseType;
+
+
+///////////////////////////////////////////////////////////////////////////////
+// SelectIf, BoolExpr, NotExpr, AndExpr, OrExpr
+//
+
+template <bool C> struct SelectIfImpl { template <typename T1, typename T2> struct Apply { typedef T1 Type; }; };
+template <> struct SelectIfImpl<false> { template <typename T1, typename T2> struct Apply { typedef T2 Type; }; };
+template <bool C, typename T1, typename T2> struct SelectIfCond : SelectIfImpl<C>::template Apply<T1,T2> {};
+template <typename C, typename T1, typename T2> struct SelectIf : SelectIfCond<C::Value, T1, T2> {};
+
+template <bool Cond1, bool Cond2> struct AndExprCond : FalseType {};
+template <> struct AndExprCond<true, true> : TrueType {};
+template <bool Cond1, bool Cond2> struct OrExprCond : TrueType {};
+template <> struct OrExprCond<false, false> : FalseType {};
+
+template <typename C> struct BoolExpr : SelectIf<C,TrueType,FalseType>::Type {};
+template <typename C> struct NotExpr  : SelectIf<C,FalseType,TrueType>::Type {};
+template <typename C1, typename C2> struct AndExpr : AndExprCond<C1::Value, C2::Value>::Type {};
+template <typename C1, typename C2> struct OrExpr  : OrExprCond<C1::Value, C2::Value>::Type {};
+
+
+///////////////////////////////////////////////////////////////////////////////
+// AddConst, MaybeAddConst, RemoveConst
+template <typename T> struct AddConst { typedef const T Type; };
+template <bool Constify, typename T> struct MaybeAddConst : SelectIfCond<Constify, const T, T> {};
+template <typename T> struct RemoveConst { typedef T Type; };
+template <typename T> struct RemoveConst<const T> { typedef T Type; };
+
+
+///////////////////////////////////////////////////////////////////////////////
+// IsSame, IsConst, IsMoreConst, IsPointer
+//
+template <typename T, typename U> struct IsSame : FalseType {};
+template <typename T> struct IsSame<T, T> : TrueType {};
+
+template <typename T> struct IsConst : FalseType {};
+template <typename T> struct IsConst<const T> : TrueType {};
+
+template <typename CT, typename T>
+struct IsMoreConst
+    : AndExpr<IsSame<typename RemoveConst<CT>::Type, typename RemoveConst<T>::Type>,
+              BoolType<IsConst<CT>::Value >= IsConst<T>::Value> >::Type {};
+
+template <typename T> struct IsPointer : FalseType {};
+template <typename T> struct IsPointer<T*> : TrueType {};
+
+///////////////////////////////////////////////////////////////////////////////
+// IsBaseOf
+//
+#if RAPIDJSON_HAS_CXX11_TYPETRAITS
+
+template <typename B, typename D> struct IsBaseOf
+    : BoolType< ::std::is_base_of<B,D>::value> {};
+
+#else // simplified version adopted from Boost
+
+template<typename B, typename D> struct IsBaseOfImpl {
+    RAPIDJSON_STATIC_ASSERT(sizeof(B) != 0);
+    RAPIDJSON_STATIC_ASSERT(sizeof(D) != 0);
+
+    typedef char (&Yes)[1];
+    typedef char (&No) [2];
+
+    template <typename T>
+    static Yes Check(const D*, T);
+    static No  Check(const B*, int);
+
+    struct Host {
+        operator const B*() const;
+        operator const D*();
+    };
+
+    enum { Value = (sizeof(Check(Host(), 0)) == sizeof(Yes)) };
+};
+
+template <typename B, typename D> struct IsBaseOf
+    : OrExpr<IsSame<B, D>, BoolExpr<IsBaseOfImpl<B, D> > >::Type {};
+
+#endif // RAPIDJSON_HAS_CXX11_TYPETRAITS
+
+
+//////////////////////////////////////////////////////////////////////////
+// EnableIf / DisableIf
+//
+template <bool Condition, typename T = void> struct EnableIfCond  { typedef T Type; };
+template <typename T> struct EnableIfCond<false, T> { /* empty */ };
+
+template <bool Condition, typename T = void> struct DisableIfCond { typedef T Type; };
+template <typename T> struct DisableIfCond<true, T> { /* empty */ };
+
+template <typename Condition, typename T = void>
+struct EnableIf : EnableIfCond<Condition::Value, T> {};
+
+template <typename Condition, typename T = void>
+struct DisableIf : DisableIfCond<Condition::Value, T> {};
+
+// SFINAE helpers
+struct SfinaeTag {};
+template <typename T> struct RemoveSfinaeTag;
+template <typename T> struct RemoveSfinaeTag<SfinaeTag&(*)(T)> { typedef T Type; };
+
+#define RAPIDJSON_REMOVEFPTR_(type) \
+    typename ::RAPIDJSON_NAMESPACE::internal::RemoveSfinaeTag \
+        < ::RAPIDJSON_NAMESPACE::internal::SfinaeTag&(*) type>::Type
+
+#define RAPIDJSON_ENABLEIF(cond) \
+    typename ::RAPIDJSON_NAMESPACE::internal::EnableIf \
+        <RAPIDJSON_REMOVEFPTR_(cond)>::Type * = NULL
+
+#define RAPIDJSON_DISABLEIF(cond) \
+    typename ::RAPIDJSON_NAMESPACE::internal::DisableIf \
+        <RAPIDJSON_REMOVEFPTR_(cond)>::Type * = NULL
+
+#define RAPIDJSON_ENABLEIF_RETURN(cond,returntype) \
+    typename ::RAPIDJSON_NAMESPACE::internal::EnableIf \
+        <RAPIDJSON_REMOVEFPTR_(cond), \
+         RAPIDJSON_REMOVEFPTR_(returntype)>::Type
+
+#define RAPIDJSON_DISABLEIF_RETURN(cond,returntype) \
+    typename ::RAPIDJSON_NAMESPACE::internal::DisableIf \
+        <RAPIDJSON_REMOVEFPTR_(cond), \
+         RAPIDJSON_REMOVEFPTR_(returntype)>::Type
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+//@endcond
+
+#if defined(__GNUC__) || defined(_MSC_VER)
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_INTERNAL_META_H_
diff --git a/external/rapidjson/internal/pow10.h b/external/rapidjson/internal/pow10.h
new file mode 100644
index 0000000..02f475d
--- /dev/null
+++ b/external/rapidjson/internal/pow10.h
@@ -0,0 +1,55 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_POW10_
+#define RAPIDJSON_POW10_
+
+#include "../rapidjson.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+//! Computes integer powers of 10 in double (10.0^n).
+/*! This function uses lookup table for fast and accurate results.
+    \param n non-negative exponent. Must <= 308.
+    \return 10.0^n
+*/
+inline double Pow10(int n) {
+    static const double e[] = { // 1e-0...1e308: 309 * 8 bytes = 2472 bytes
+        1e+0,  
+        1e+1,  1e+2,  1e+3,  1e+4,  1e+5,  1e+6,  1e+7,  1e+8,  1e+9,  1e+10, 1e+11, 1e+12, 1e+13, 1e+14, 1e+15, 1e+16, 1e+17, 1e+18, 1e+19, 1e+20, 
+        1e+21, 1e+22, 1e+23, 1e+24, 1e+25, 1e+26, 1e+27, 1e+28, 1e+29, 1e+30, 1e+31, 1e+32, 1e+33, 1e+34, 1e+35, 1e+36, 1e+37, 1e+38, 1e+39, 1e+40,
+        1e+41, 1e+42, 1e+43, 1e+44, 1e+45, 1e+46, 1e+47, 1e+48, 1e+49, 1e+50, 1e+51, 1e+52, 1e+53, 1e+54, 1e+55, 1e+56, 1e+57, 1e+58, 1e+59, 1e+60,
+        1e+61, 1e+62, 1e+63, 1e+64, 1e+65, 1e+66, 1e+67, 1e+68, 1e+69, 1e+70, 1e+71, 1e+72, 1e+73, 1e+74, 1e+75, 1e+76, 1e+77, 1e+78, 1e+79, 1e+80,
+        1e+81, 1e+82, 1e+83, 1e+84, 1e+85, 1e+86, 1e+87, 1e+88, 1e+89, 1e+90, 1e+91, 1e+92, 1e+93, 1e+94, 1e+95, 1e+96, 1e+97, 1e+98, 1e+99, 1e+100,
+        1e+101,1e+102,1e+103,1e+104,1e+105,1e+106,1e+107,1e+108,1e+109,1e+110,1e+111,1e+112,1e+113,1e+114,1e+115,1e+116,1e+117,1e+118,1e+119,1e+120,
+        1e+121,1e+122,1e+123,1e+124,1e+125,1e+126,1e+127,1e+128,1e+129,1e+130,1e+131,1e+132,1e+133,1e+134,1e+135,1e+136,1e+137,1e+138,1e+139,1e+140,
+        1e+141,1e+142,1e+143,1e+144,1e+145,1e+146,1e+147,1e+148,1e+149,1e+150,1e+151,1e+152,1e+153,1e+154,1e+155,1e+156,1e+157,1e+158,1e+159,1e+160,
+        1e+161,1e+162,1e+163,1e+164,1e+165,1e+166,1e+167,1e+168,1e+169,1e+170,1e+171,1e+172,1e+173,1e+174,1e+175,1e+176,1e+177,1e+178,1e+179,1e+180,
+        1e+181,1e+182,1e+183,1e+184,1e+185,1e+186,1e+187,1e+188,1e+189,1e+190,1e+191,1e+192,1e+193,1e+194,1e+195,1e+196,1e+197,1e+198,1e+199,1e+200,
+        1e+201,1e+202,1e+203,1e+204,1e+205,1e+206,1e+207,1e+208,1e+209,1e+210,1e+211,1e+212,1e+213,1e+214,1e+215,1e+216,1e+217,1e+218,1e+219,1e+220,
+        1e+221,1e+222,1e+223,1e+224,1e+225,1e+226,1e+227,1e+228,1e+229,1e+230,1e+231,1e+232,1e+233,1e+234,1e+235,1e+236,1e+237,1e+238,1e+239,1e+240,
+        1e+241,1e+242,1e+243,1e+244,1e+245,1e+246,1e+247,1e+248,1e+249,1e+250,1e+251,1e+252,1e+253,1e+254,1e+255,1e+256,1e+257,1e+258,1e+259,1e+260,
+        1e+261,1e+262,1e+263,1e+264,1e+265,1e+266,1e+267,1e+268,1e+269,1e+270,1e+271,1e+272,1e+273,1e+274,1e+275,1e+276,1e+277,1e+278,1e+279,1e+280,
+        1e+281,1e+282,1e+283,1e+284,1e+285,1e+286,1e+287,1e+288,1e+289,1e+290,1e+291,1e+292,1e+293,1e+294,1e+295,1e+296,1e+297,1e+298,1e+299,1e+300,
+        1e+301,1e+302,1e+303,1e+304,1e+305,1e+306,1e+307,1e+308
+    };
+    RAPIDJSON_ASSERT(n >= 0 && n <= 308);
+    return e[n];
+}
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_POW10_
diff --git a/external/rapidjson/internal/regex.h b/external/rapidjson/internal/regex.h
new file mode 100644
index 0000000..e1a2faa
--- /dev/null
+++ b/external/rapidjson/internal/regex.h
@@ -0,0 +1,734 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_INTERNAL_REGEX_H_
+#define RAPIDJSON_INTERNAL_REGEX_H_
+
+#include "../allocators.h"
+#include "../stream.h"
+#include "stack.h"
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+RAPIDJSON_DIAG_OFF(switch-enum)
+RAPIDJSON_DIAG_OFF(implicit-fallthrough)
+#endif
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#if __GNUC__ >= 7
+RAPIDJSON_DIAG_OFF(implicit-fallthrough)
+#endif
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4512) // assignment operator could not be generated
+#endif
+
+#ifndef RAPIDJSON_REGEX_VERBOSE
+#define RAPIDJSON_REGEX_VERBOSE 0
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+///////////////////////////////////////////////////////////////////////////////
+// DecodedStream
+
+template <typename SourceStream, typename Encoding>
+class DecodedStream {
+public:
+    DecodedStream(SourceStream& ss) : ss_(ss), codepoint_() { Decode(); }
+    unsigned Peek() { return codepoint_; }
+    unsigned Take() {
+        unsigned c = codepoint_;
+        if (c) // No further decoding when '\0'
+            Decode();
+        return c;
+    }
+
+private:
+    void Decode() {
+        if (!Encoding::Decode(ss_, &codepoint_))
+            codepoint_ = 0;
+    }
+
+    SourceStream& ss_;
+    unsigned codepoint_;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericRegex
+
+static const SizeType kRegexInvalidState = ~SizeType(0);  //!< Represents an invalid index in GenericRegex::State::out, out1
+static const SizeType kRegexInvalidRange = ~SizeType(0);
+
+template <typename Encoding, typename Allocator>
+class GenericRegexSearch;
+
+//! Regular expression engine with subset of ECMAscript grammar.
+/*!
+    Supported regular expression syntax:
+    - \c ab     Concatenation
+    - \c a|b    Alternation
+    - \c a?     Zero or one
+    - \c a*     Zero or more
+    - \c a+     One or more
+    - \c a{3}   Exactly 3 times
+    - \c a{3,}  At least 3 times
+    - \c a{3,5} 3 to 5 times
+    - \c (ab)   Grouping
+    - \c ^a     At the beginning
+    - \c a$     At the end
+    - \c .      Any character
+    - \c [abc]  Character classes
+    - \c [a-c]  Character class range
+    - \c [a-z0-9_] Character class combination
+    - \c [^abc] Negated character classes
+    - \c [^a-c] Negated character class range
+    - \c [\b]   Backspace (U+0008)
+    - \c \\| \\\\ ...  Escape characters
+    - \c \\f Form feed (U+000C)
+    - \c \\n Line feed (U+000A)
+    - \c \\r Carriage return (U+000D)
+    - \c \\t Tab (U+0009)
+    - \c \\v Vertical tab (U+000B)
+
+    \note This is a Thompson NFA engine, implemented with reference to 
+        Cox, Russ. "Regular Expression Matching Can Be Simple And Fast (but is slow in Java, Perl, PHP, Python, Ruby,...).", 
+        https://swtch.com/~rsc/regexp/regexp1.html 
+*/
+template <typename Encoding, typename Allocator = CrtAllocator>
+class GenericRegex {
+public:
+    typedef Encoding EncodingType;
+    typedef typename Encoding::Ch Ch;
+    template <typename, typename> friend class GenericRegexSearch;
+
+    GenericRegex(const Ch* source, Allocator* allocator = 0) : 
+        states_(allocator, 256), ranges_(allocator, 256), root_(kRegexInvalidState), stateCount_(), rangeCount_(), 
+        anchorBegin_(), anchorEnd_()
+    {
+        GenericStringStream<Encoding> ss(source);
+        DecodedStream<GenericStringStream<Encoding>, Encoding> ds(ss);
+        Parse(ds);
+    }
+
+    ~GenericRegex() {}
+
+    bool IsValid() const {
+        return root_ != kRegexInvalidState;
+    }
+
+private:
+    enum Operator {
+        kZeroOrOne,
+        kZeroOrMore,
+        kOneOrMore,
+        kConcatenation,
+        kAlternation,
+        kLeftParenthesis
+    };
+
+    static const unsigned kAnyCharacterClass = 0xFFFFFFFF;   //!< For '.'
+    static const unsigned kRangeCharacterClass = 0xFFFFFFFE;
+    static const unsigned kRangeNegationFlag = 0x80000000;
+
+    struct Range {
+        unsigned start; // 
+        unsigned end;
+        SizeType next;
+    };
+
+    struct State {
+        SizeType out;     //!< Equals to kInvalid for matching state
+        SizeType out1;    //!< Equals to non-kInvalid for split
+        SizeType rangeStart;
+        unsigned codepoint;
+    };
+
+    struct Frag {
+        Frag(SizeType s, SizeType o, SizeType m) : start(s), out(o), minIndex(m) {}
+        SizeType start;
+        SizeType out; //!< link-list of all output states
+        SizeType minIndex;
+    };
+
+    State& GetState(SizeType index) {
+        RAPIDJSON_ASSERT(index < stateCount_);
+        return states_.template Bottom<State>()[index];
+    }
+
+    const State& GetState(SizeType index) const {
+        RAPIDJSON_ASSERT(index < stateCount_);
+        return states_.template Bottom<State>()[index];
+    }
+
+    Range& GetRange(SizeType index) {
+        RAPIDJSON_ASSERT(index < rangeCount_);
+        return ranges_.template Bottom<Range>()[index];
+    }
+
+    const Range& GetRange(SizeType index) const {
+        RAPIDJSON_ASSERT(index < rangeCount_);
+        return ranges_.template Bottom<Range>()[index];
+    }
+
+    template <typename InputStream>
+    void Parse(DecodedStream<InputStream, Encoding>& ds) {
+        Allocator allocator;
+        Stack<Allocator> operandStack(&allocator, 256);     // Frag
+        Stack<Allocator> operatorStack(&allocator, 256);    // Operator
+        Stack<Allocator> atomCountStack(&allocator, 256);   // unsigned (Atom per parenthesis)
+
+        *atomCountStack.template Push<unsigned>() = 0;
+
+        unsigned codepoint;
+        while (ds.Peek() != 0) {
+            switch (codepoint = ds.Take()) {
+                case '^':
+                    anchorBegin_ = true;
+                    break;
+
+                case '$':
+                    anchorEnd_ = true;
+                    break;
+
+                case '|':
+                    while (!operatorStack.Empty() && *operatorStack.template Top<Operator>() < kAlternation)
+                        if (!Eval(operandStack, *operatorStack.template Pop<Operator>(1)))
+                            return;
+                    *operatorStack.template Push<Operator>() = kAlternation;
+                    *atomCountStack.template Top<unsigned>() = 0;
+                    break;
+
+                case '(':
+                    *operatorStack.template Push<Operator>() = kLeftParenthesis;
+                    *atomCountStack.template Push<unsigned>() = 0;
+                    break;
+
+                case ')':
+                    while (!operatorStack.Empty() && *operatorStack.template Top<Operator>() != kLeftParenthesis)
+                        if (!Eval(operandStack, *operatorStack.template Pop<Operator>(1)))
+                            return;
+                    if (operatorStack.Empty())
+                        return;
+                    operatorStack.template Pop<Operator>(1);
+                    atomCountStack.template Pop<unsigned>(1);
+                    ImplicitConcatenation(atomCountStack, operatorStack);
+                    break;
+
+                case '?':
+                    if (!Eval(operandStack, kZeroOrOne))
+                        return;
+                    break;
+
+                case '*':
+                    if (!Eval(operandStack, kZeroOrMore))
+                        return;
+                    break;
+
+                case '+':
+                    if (!Eval(operandStack, kOneOrMore))
+                        return;
+                    break;
+
+                case '{':
+                    {
+                        unsigned n, m;
+                        if (!ParseUnsigned(ds, &n))
+                            return;
+
+                        if (ds.Peek() == ',') {
+                            ds.Take();
+                            if (ds.Peek() == '}')
+                                m = kInfinityQuantifier;
+                            else if (!ParseUnsigned(ds, &m) || m < n)
+                                return;
+                        }
+                        else
+                            m = n;
+
+                        if (!EvalQuantifier(operandStack, n, m) || ds.Peek() != '}')
+                            return;
+                        ds.Take();
+                    }
+                    break;
+
+                case '.':
+                    PushOperand(operandStack, kAnyCharacterClass);
+                    ImplicitConcatenation(atomCountStack, operatorStack);
+                    break;
+
+                case '[':
+                    {
+                        SizeType range;
+                        if (!ParseRange(ds, &range))
+                            return;
+                        SizeType s = NewState(kRegexInvalidState, kRegexInvalidState, kRangeCharacterClass);
+                        GetState(s).rangeStart = range;
+                        *operandStack.template Push<Frag>() = Frag(s, s, s);
+                    }
+                    ImplicitConcatenation(atomCountStack, operatorStack);
+                    break;
+
+                case '\\': // Escape character
+                    if (!CharacterEscape(ds, &codepoint))
+                        return; // Unsupported escape character
+                    // fall through to default
+
+                default: // Pattern character
+                    PushOperand(operandStack, codepoint);
+                    ImplicitConcatenation(atomCountStack, operatorStack);
+            }
+        }
+
+        while (!operatorStack.Empty())
+            if (!Eval(operandStack, *operatorStack.template Pop<Operator>(1)))
+                return;
+
+        // Link the operand to matching state.
+        if (operandStack.GetSize() == sizeof(Frag)) {
+            Frag* e = operandStack.template Pop<Frag>(1);
+            Patch(e->out, NewState(kRegexInvalidState, kRegexInvalidState, 0));
+            root_ = e->start;
+
+#if RAPIDJSON_REGEX_VERBOSE
+            printf("root: %d\n", root_);
+            for (SizeType i = 0; i < stateCount_ ; i++) {
+                State& s = GetState(i);
+                printf("[%2d] out: %2d out1: %2d c: '%c'\n", i, s.out, s.out1, (char)s.codepoint);
+            }
+            printf("\n");
+#endif
+        }
+    }
+
+    SizeType NewState(SizeType out, SizeType out1, unsigned codepoint) {
+        State* s = states_.template Push<State>();
+        s->out = out;
+        s->out1 = out1;
+        s->codepoint = codepoint;
+        s->rangeStart = kRegexInvalidRange;
+        return stateCount_++;
+    }
+
+    void PushOperand(Stack<Allocator>& operandStack, unsigned codepoint) {
+        SizeType s = NewState(kRegexInvalidState, kRegexInvalidState, codepoint);
+        *operandStack.template Push<Frag>() = Frag(s, s, s);
+    }
+
+    void ImplicitConcatenation(Stack<Allocator>& atomCountStack, Stack<Allocator>& operatorStack) {
+        if (*atomCountStack.template Top<unsigned>())
+            *operatorStack.template Push<Operator>() = kConcatenation;
+        (*atomCountStack.template Top<unsigned>())++;
+    }
+
+    SizeType Append(SizeType l1, SizeType l2) {
+        SizeType old = l1;
+        while (GetState(l1).out != kRegexInvalidState)
+            l1 = GetState(l1).out;
+        GetState(l1).out = l2;
+        return old;
+    }
+
+    void Patch(SizeType l, SizeType s) {
+        for (SizeType next; l != kRegexInvalidState; l = next) {
+            next = GetState(l).out;
+            GetState(l).out = s;
+        }
+    }
+
+    bool Eval(Stack<Allocator>& operandStack, Operator op) {
+        switch (op) {
+            case kConcatenation:
+                RAPIDJSON_ASSERT(operandStack.GetSize() >= sizeof(Frag) * 2);
+                {
+                    Frag e2 = *operandStack.template Pop<Frag>(1);
+                    Frag e1 = *operandStack.template Pop<Frag>(1);
+                    Patch(e1.out, e2.start);
+                    *operandStack.template Push<Frag>() = Frag(e1.start, e2.out, Min(e1.minIndex, e2.minIndex));
+                }
+                return true;
+
+            case kAlternation:
+                if (operandStack.GetSize() >= sizeof(Frag) * 2) {
+                    Frag e2 = *operandStack.template Pop<Frag>(1);
+                    Frag e1 = *operandStack.template Pop<Frag>(1);
+                    SizeType s = NewState(e1.start, e2.start, 0);
+                    *operandStack.template Push<Frag>() = Frag(s, Append(e1.out, e2.out), Min(e1.minIndex, e2.minIndex));
+                    return true;
+                }
+                return false;
+
+            case kZeroOrOne:
+                if (operandStack.GetSize() >= sizeof(Frag)) {
+                    Frag e = *operandStack.template Pop<Frag>(1);
+                    SizeType s = NewState(kRegexInvalidState, e.start, 0);
+                    *operandStack.template Push<Frag>() = Frag(s, Append(e.out, s), e.minIndex);
+                    return true;
+                }
+                return false;
+
+            case kZeroOrMore:
+                if (operandStack.GetSize() >= sizeof(Frag)) {
+                    Frag e = *operandStack.template Pop<Frag>(1);
+                    SizeType s = NewState(kRegexInvalidState, e.start, 0);
+                    Patch(e.out, s);
+                    *operandStack.template Push<Frag>() = Frag(s, s, e.minIndex);
+                    return true;
+                }
+                return false;
+
+            default: 
+                RAPIDJSON_ASSERT(op == kOneOrMore);
+                if (operandStack.GetSize() >= sizeof(Frag)) {
+                    Frag e = *operandStack.template Pop<Frag>(1);
+                    SizeType s = NewState(kRegexInvalidState, e.start, 0);
+                    Patch(e.out, s);
+                    *operandStack.template Push<Frag>() = Frag(e.start, s, e.minIndex);
+                    return true;
+                }
+                return false;
+        }
+    }
+
+    bool EvalQuantifier(Stack<Allocator>& operandStack, unsigned n, unsigned m) {
+        RAPIDJSON_ASSERT(n <= m);
+        RAPIDJSON_ASSERT(operandStack.GetSize() >= sizeof(Frag));
+
+        if (n == 0) {
+            if (m == 0)                             // a{0} not support
+                return false;
+            else if (m == kInfinityQuantifier)
+                Eval(operandStack, kZeroOrMore);    // a{0,} -> a*
+            else {
+                Eval(operandStack, kZeroOrOne);         // a{0,5} -> a?
+                for (unsigned i = 0; i < m - 1; i++)
+                    CloneTopOperand(operandStack);      // a{0,5} -> a? a? a? a? a?
+                for (unsigned i = 0; i < m - 1; i++)
+                    Eval(operandStack, kConcatenation); // a{0,5} -> a?a?a?a?a?
+            }
+            return true;
+        }
+
+        for (unsigned i = 0; i < n - 1; i++)        // a{3} -> a a a
+            CloneTopOperand(operandStack);
+
+        if (m == kInfinityQuantifier)
+            Eval(operandStack, kOneOrMore);         // a{3,} -> a a a+
+        else if (m > n) {
+            CloneTopOperand(operandStack);          // a{3,5} -> a a a a
+            Eval(operandStack, kZeroOrOne);         // a{3,5} -> a a a a?
+            for (unsigned i = n; i < m - 1; i++)
+                CloneTopOperand(operandStack);      // a{3,5} -> a a a a? a?
+            for (unsigned i = n; i < m; i++)
+                Eval(operandStack, kConcatenation); // a{3,5} -> a a aa?a?
+        }
+
+        for (unsigned i = 0; i < n - 1; i++)
+            Eval(operandStack, kConcatenation);     // a{3} -> aaa, a{3,} -> aaa+, a{3.5} -> aaaa?a?
+
+        return true;
+    }
+
+    static SizeType Min(SizeType a, SizeType b) { return a < b ? a : b; }
+
+    void CloneTopOperand(Stack<Allocator>& operandStack) {
+        const Frag src = *operandStack.template Top<Frag>(); // Copy constructor to prevent invalidation
+        SizeType count = stateCount_ - src.minIndex; // Assumes top operand contains states in [src->minIndex, stateCount_)
+        State* s = states_.template Push<State>(count);
+        memcpy(s, &GetState(src.minIndex), count * sizeof(State));
+        for (SizeType j = 0; j < count; j++) {
+            if (s[j].out != kRegexInvalidState)
+                s[j].out += count;
+            if (s[j].out1 != kRegexInvalidState)
+                s[j].out1 += count;
+        }
+        *operandStack.template Push<Frag>() = Frag(src.start + count, src.out + count, src.minIndex + count);
+        stateCount_ += count;
+    }
+
+    template <typename InputStream>
+    bool ParseUnsigned(DecodedStream<InputStream, Encoding>& ds, unsigned* u) {
+        unsigned r = 0;
+        if (ds.Peek() < '0' || ds.Peek() > '9')
+            return false;
+        while (ds.Peek() >= '0' && ds.Peek() <= '9') {
+            if (r >= 429496729 && ds.Peek() > '5') // 2^32 - 1 = 4294967295
+                return false; // overflow
+            r = r * 10 + (ds.Take() - '0');
+        }
+        *u = r;
+        return true;
+    }
+
+    template <typename InputStream>
+    bool ParseRange(DecodedStream<InputStream, Encoding>& ds, SizeType* range) {
+        bool isBegin = true;
+        bool negate = false;
+        int step = 0;
+        SizeType start = kRegexInvalidRange;
+        SizeType current = kRegexInvalidRange;
+        unsigned codepoint;
+        while ((codepoint = ds.Take()) != 0) {
+            if (isBegin) {
+                isBegin = false;
+                if (codepoint == '^') {
+                    negate = true;
+                    continue;
+                }
+            }
+
+            switch (codepoint) {
+            case ']':
+                if (start == kRegexInvalidRange)
+                    return false;   // Error: nothing inside []
+                if (step == 2) { // Add trailing '-'
+                    SizeType r = NewRange('-');
+                    RAPIDJSON_ASSERT(current != kRegexInvalidRange);
+                    GetRange(current).next = r;
+                }
+                if (negate)
+                    GetRange(start).start |= kRangeNegationFlag;
+                *range = start;
+                return true;
+
+            case '\\':
+                if (ds.Peek() == 'b') {
+                    ds.Take();
+                    codepoint = 0x0008; // Escape backspace character
+                }
+                else if (!CharacterEscape(ds, &codepoint))
+                    return false;
+                // fall through to default
+
+            default:
+                switch (step) {
+                case 1:
+                    if (codepoint == '-') {
+                        step++;
+                        break;
+                    }
+                    // fall through to step 0 for other characters
+
+                case 0:
+                    {
+                        SizeType r = NewRange(codepoint);
+                        if (current != kRegexInvalidRange)
+                            GetRange(current).next = r;
+                        if (start == kRegexInvalidRange)
+                            start = r;
+                        current = r;
+                    }
+                    step = 1;
+                    break;
+
+                default:
+                    RAPIDJSON_ASSERT(step == 2);
+                    GetRange(current).end = codepoint;
+                    step = 0;
+                }
+            }
+        }
+        return false;
+    }
+    
+    SizeType NewRange(unsigned codepoint) {
+        Range* r = ranges_.template Push<Range>();
+        r->start = r->end = codepoint;
+        r->next = kRegexInvalidRange;
+        return rangeCount_++;
+    }
+
+    template <typename InputStream>
+    bool CharacterEscape(DecodedStream<InputStream, Encoding>& ds, unsigned* escapedCodepoint) {
+        unsigned codepoint;
+        switch (codepoint = ds.Take()) {
+            case '^':
+            case '$':
+            case '|':
+            case '(':
+            case ')':
+            case '?':
+            case '*':
+            case '+':
+            case '.':
+            case '[':
+            case ']':
+            case '{':
+            case '}':
+            case '\\':
+                *escapedCodepoint = codepoint; return true;
+            case 'f': *escapedCodepoint = 0x000C; return true;
+            case 'n': *escapedCodepoint = 0x000A; return true;
+            case 'r': *escapedCodepoint = 0x000D; return true;
+            case 't': *escapedCodepoint = 0x0009; return true;
+            case 'v': *escapedCodepoint = 0x000B; return true;
+            default:
+                return false; // Unsupported escape character
+        }
+    }
+
+    Stack<Allocator> states_;
+    Stack<Allocator> ranges_;
+    SizeType root_;
+    SizeType stateCount_;
+    SizeType rangeCount_;
+
+    static const unsigned kInfinityQuantifier = ~0u;
+
+    // For SearchWithAnchoring()
+    bool anchorBegin_;
+    bool anchorEnd_;
+};
+
+template <typename RegexType, typename Allocator = CrtAllocator>
+class GenericRegexSearch {
+public:
+    typedef typename RegexType::EncodingType Encoding;
+    typedef typename Encoding::Ch Ch;
+
+    GenericRegexSearch(const RegexType& regex, Allocator* allocator = 0) : 
+        regex_(regex), allocator_(allocator), ownAllocator_(0),
+        state0_(allocator, 0), state1_(allocator, 0), stateSet_()
+    {
+        RAPIDJSON_ASSERT(regex_.IsValid());
+        if (!allocator_)
+            ownAllocator_ = allocator_ = RAPIDJSON_NEW(Allocator)();
+        stateSet_ = static_cast<unsigned*>(allocator_->Malloc(GetStateSetSize()));
+        state0_.template Reserve<SizeType>(regex_.stateCount_);
+        state1_.template Reserve<SizeType>(regex_.stateCount_);
+    }
+
+    ~GenericRegexSearch() {
+        Allocator::Free(stateSet_);
+        RAPIDJSON_DELETE(ownAllocator_);
+    }
+
+    template <typename InputStream>
+    bool Match(InputStream& is) {
+        return SearchWithAnchoring(is, true, true);
+    }
+
+    bool Match(const Ch* s) {
+        GenericStringStream<Encoding> is(s);
+        return Match(is);
+    }
+
+    template <typename InputStream>
+    bool Search(InputStream& is) {
+        return SearchWithAnchoring(is, regex_.anchorBegin_, regex_.anchorEnd_);
+    }
+
+    bool Search(const Ch* s) {
+        GenericStringStream<Encoding> is(s);
+        return Search(is);
+    }
+
+private:
+    typedef typename RegexType::State State;
+    typedef typename RegexType::Range Range;
+
+    template <typename InputStream>
+    bool SearchWithAnchoring(InputStream& is, bool anchorBegin, bool anchorEnd) {
+        DecodedStream<InputStream, Encoding> ds(is);
+
+        state0_.Clear();
+        Stack<Allocator> *current = &state0_, *next = &state1_;
+        const size_t stateSetSize = GetStateSetSize();
+        std::memset(stateSet_, 0, stateSetSize);
+
+        bool matched = AddState(*current, regex_.root_);
+        unsigned codepoint;
+        while (!current->Empty() && (codepoint = ds.Take()) != 0) {
+            std::memset(stateSet_, 0, stateSetSize);
+            next->Clear();
+            matched = false;
+            for (const SizeType* s = current->template Bottom<SizeType>(); s != current->template End<SizeType>(); ++s) {
+                const State& sr = regex_.GetState(*s);
+                if (sr.codepoint == codepoint ||
+                    sr.codepoint == RegexType::kAnyCharacterClass || 
+                    (sr.codepoint == RegexType::kRangeCharacterClass && MatchRange(sr.rangeStart, codepoint)))
+                {
+                    matched = AddState(*next, sr.out) || matched;
+                    if (!anchorEnd && matched)
+                        return true;
+                }
+                if (!anchorBegin)
+                    AddState(*next, regex_.root_);
+            }
+            internal::Swap(current, next);
+        }
+
+        return matched;
+    }
+
+    size_t GetStateSetSize() const {
+        return (regex_.stateCount_ + 31) / 32 * 4;
+    }
+
+    // Return whether the added states is a match state
+    bool AddState(Stack<Allocator>& l, SizeType index) {
+        RAPIDJSON_ASSERT(index != kRegexInvalidState);
+
+        const State& s = regex_.GetState(index);
+        if (s.out1 != kRegexInvalidState) { // Split
+            bool matched = AddState(l, s.out);
+            return AddState(l, s.out1) || matched;
+        }
+        else if (!(stateSet_[index >> 5] & (1u << (index & 31)))) {
+            stateSet_[index >> 5] |= (1u << (index & 31));
+            *l.template PushUnsafe<SizeType>() = index;
+        }
+        return s.out == kRegexInvalidState; // by using PushUnsafe() above, we can ensure s is not validated due to reallocation.
+    }
+
+    bool MatchRange(SizeType rangeIndex, unsigned codepoint) const {
+        bool yes = (regex_.GetRange(rangeIndex).start & RegexType::kRangeNegationFlag) == 0;
+        while (rangeIndex != kRegexInvalidRange) {
+            const Range& r = regex_.GetRange(rangeIndex);
+            if (codepoint >= (r.start & ~RegexType::kRangeNegationFlag) && codepoint <= r.end)
+                return yes;
+            rangeIndex = r.next;
+        }
+        return !yes;
+    }
+
+    const RegexType& regex_;
+    Allocator* allocator_;
+    Allocator* ownAllocator_;
+    Stack<Allocator> state0_;
+    Stack<Allocator> state1_;
+    uint32_t* stateSet_;
+};
+
+typedef GenericRegex<UTF8<> > Regex;
+typedef GenericRegexSearch<Regex> RegexSearch;
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_INTERNAL_REGEX_H_
diff --git a/external/rapidjson/internal/stack.h b/external/rapidjson/internal/stack.h
new file mode 100644
index 0000000..5c5398c
--- /dev/null
+++ b/external/rapidjson/internal/stack.h
@@ -0,0 +1,231 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_INTERNAL_STACK_H_
+#define RAPIDJSON_INTERNAL_STACK_H_
+
+#include "../allocators.h"
+#include "swap.h"
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(c++98-compat)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+///////////////////////////////////////////////////////////////////////////////
+// Stack
+
+//! A type-unsafe stack for storing different types of data.
+/*! \tparam Allocator Allocator for allocating stack memory.
+*/
+template <typename Allocator>
+class Stack {
+public:
+    // Optimization note: Do not allocate memory for stack_ in constructor.
+    // Do it lazily when first Push() -> Expand() -> Resize().
+    Stack(Allocator* allocator, size_t stackCapacity) : allocator_(allocator), ownAllocator_(0), stack_(0), stackTop_(0), stackEnd_(0), initialCapacity_(stackCapacity) {
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    Stack(Stack&& rhs)
+        : allocator_(rhs.allocator_),
+          ownAllocator_(rhs.ownAllocator_),
+          stack_(rhs.stack_),
+          stackTop_(rhs.stackTop_),
+          stackEnd_(rhs.stackEnd_),
+          initialCapacity_(rhs.initialCapacity_)
+    {
+        rhs.allocator_ = 0;
+        rhs.ownAllocator_ = 0;
+        rhs.stack_ = 0;
+        rhs.stackTop_ = 0;
+        rhs.stackEnd_ = 0;
+        rhs.initialCapacity_ = 0;
+    }
+#endif
+
+    ~Stack() {
+        Destroy();
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    Stack& operator=(Stack&& rhs) {
+        if (&rhs != this)
+        {
+            Destroy();
+
+            allocator_ = rhs.allocator_;
+            ownAllocator_ = rhs.ownAllocator_;
+            stack_ = rhs.stack_;
+            stackTop_ = rhs.stackTop_;
+            stackEnd_ = rhs.stackEnd_;
+            initialCapacity_ = rhs.initialCapacity_;
+
+            rhs.allocator_ = 0;
+            rhs.ownAllocator_ = 0;
+            rhs.stack_ = 0;
+            rhs.stackTop_ = 0;
+            rhs.stackEnd_ = 0;
+            rhs.initialCapacity_ = 0;
+        }
+        return *this;
+    }
+#endif
+
+    void Swap(Stack& rhs) RAPIDJSON_NOEXCEPT {
+        internal::Swap(allocator_, rhs.allocator_);
+        internal::Swap(ownAllocator_, rhs.ownAllocator_);
+        internal::Swap(stack_, rhs.stack_);
+        internal::Swap(stackTop_, rhs.stackTop_);
+        internal::Swap(stackEnd_, rhs.stackEnd_);
+        internal::Swap(initialCapacity_, rhs.initialCapacity_);
+    }
+
+    void Clear() { stackTop_ = stack_; }
+
+    void ShrinkToFit() { 
+        if (Empty()) {
+            // If the stack is empty, completely deallocate the memory.
+            Allocator::Free(stack_);
+            stack_ = 0;
+            stackTop_ = 0;
+            stackEnd_ = 0;
+        }
+        else
+            Resize(GetSize());
+    }
+
+    // Optimization note: try to minimize the size of this function for force inline.
+    // Expansion is run very infrequently, so it is moved to another (probably non-inline) function.
+    template<typename T>
+    RAPIDJSON_FORCEINLINE void Reserve(size_t count = 1) {
+         // Expand the stack if needed
+        if (RAPIDJSON_UNLIKELY(stackTop_ + sizeof(T) * count > stackEnd_))
+            Expand<T>(count);
+    }
+
+    template<typename T>
+    RAPIDJSON_FORCEINLINE T* Push(size_t count = 1) {
+        Reserve<T>(count);
+        return PushUnsafe<T>(count);
+    }
+
+    template<typename T>
+    RAPIDJSON_FORCEINLINE T* PushUnsafe(size_t count = 1) {
+        RAPIDJSON_ASSERT(stackTop_);
+        RAPIDJSON_ASSERT(stackTop_ + sizeof(T) * count <= stackEnd_);
+        T* ret = reinterpret_cast<T*>(stackTop_);
+        stackTop_ += sizeof(T) * count;
+        return ret;
+    }
+
+    template<typename T>
+    T* Pop(size_t count) {
+        RAPIDJSON_ASSERT(GetSize() >= count * sizeof(T));
+        stackTop_ -= count * sizeof(T);
+        return reinterpret_cast<T*>(stackTop_);
+    }
+
+    template<typename T>
+    T* Top() { 
+        RAPIDJSON_ASSERT(GetSize() >= sizeof(T));
+        return reinterpret_cast<T*>(stackTop_ - sizeof(T));
+    }
+
+    template<typename T>
+    const T* Top() const {
+        RAPIDJSON_ASSERT(GetSize() >= sizeof(T));
+        return reinterpret_cast<T*>(stackTop_ - sizeof(T));
+    }
+
+    template<typename T>
+    T* End() { return reinterpret_cast<T*>(stackTop_); }
+
+    template<typename T>
+    const T* End() const { return reinterpret_cast<T*>(stackTop_); }
+
+    template<typename T>
+    T* Bottom() { return reinterpret_cast<T*>(stack_); }
+
+    template<typename T>
+    const T* Bottom() const { return reinterpret_cast<T*>(stack_); }
+
+    bool HasAllocator() const {
+        return allocator_ != 0;
+    }
+
+    Allocator& GetAllocator() {
+        RAPIDJSON_ASSERT(allocator_);
+        return *allocator_;
+    }
+
+    bool Empty() const { return stackTop_ == stack_; }
+    size_t GetSize() const { return static_cast<size_t>(stackTop_ - stack_); }
+    size_t GetCapacity() const { return static_cast<size_t>(stackEnd_ - stack_); }
+
+private:
+    template<typename T>
+    void Expand(size_t count) {
+        // Only expand the capacity if the current stack exists. Otherwise just create a stack with initial capacity.
+        size_t newCapacity;
+        if (stack_ == 0) {
+            if (!allocator_)
+                ownAllocator_ = allocator_ = RAPIDJSON_NEW(Allocator)();
+            newCapacity = initialCapacity_;
+        } else {
+            newCapacity = GetCapacity();
+            newCapacity += (newCapacity + 1) / 2;
+        }
+        size_t newSize = GetSize() + sizeof(T) * count;
+        if (newCapacity < newSize)
+            newCapacity = newSize;
+
+        Resize(newCapacity);
+    }
+
+    void Resize(size_t newCapacity) {
+        const size_t size = GetSize();  // Backup the current size
+        stack_ = static_cast<char*>(allocator_->Realloc(stack_, GetCapacity(), newCapacity));
+        stackTop_ = stack_ + size;
+        stackEnd_ = stack_ + newCapacity;
+    }
+
+    void Destroy() {
+        Allocator::Free(stack_);
+        RAPIDJSON_DELETE(ownAllocator_); // Only delete if it is owned by the stack
+    }
+
+    // Prohibit copy constructor & assignment operator.
+    Stack(const Stack&);
+    Stack& operator=(const Stack&);
+
+    Allocator* allocator_;
+    Allocator* ownAllocator_;
+    char *stack_;
+    char *stackTop_;
+    char *stackEnd_;
+    size_t initialCapacity_;
+};
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_STACK_H_
diff --git a/external/rapidjson/internal/strfunc.h b/external/rapidjson/internal/strfunc.h
new file mode 100644
index 0000000..226439a
--- /dev/null
+++ b/external/rapidjson/internal/strfunc.h
@@ -0,0 +1,69 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_INTERNAL_STRFUNC_H_
+#define RAPIDJSON_INTERNAL_STRFUNC_H_
+
+#include "../stream.h"
+#include <cwchar>
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+//! Custom strlen() which works on different character types.
+/*! \tparam Ch Character type (e.g. char, wchar_t, short)
+    \param s Null-terminated input string.
+    \return Number of characters in the string. 
+    \note This has the same semantics as strlen(), the return value is not number of Unicode codepoints.
+*/
+template <typename Ch>
+inline SizeType StrLen(const Ch* s) {
+    RAPIDJSON_ASSERT(s != 0);
+    const Ch* p = s;
+    while (*p) ++p;
+    return SizeType(p - s);
+}
+
+template <>
+inline SizeType StrLen(const char* s) {
+    return SizeType(std::strlen(s));
+}
+
+template <>
+inline SizeType StrLen(const wchar_t* s) {
+    return SizeType(std::wcslen(s));
+}
+
+//! Returns number of code points in a encoded string.
+template<typename Encoding>
+bool CountStringCodePoint(const typename Encoding::Ch* s, SizeType length, SizeType* outCount) {
+    RAPIDJSON_ASSERT(s != 0);
+    RAPIDJSON_ASSERT(outCount != 0);
+    GenericStringStream<Encoding> is(s);
+    const typename Encoding::Ch* end = s + length;
+    SizeType count = 0;
+    while (is.src_ < end) {
+        unsigned codepoint;
+        if (!Encoding::Decode(is, &codepoint))
+            return false;
+        count++;
+    }
+    *outCount = count;
+    return true;
+}
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_INTERNAL_STRFUNC_H_
diff --git a/external/rapidjson/internal/strtod.h b/external/rapidjson/internal/strtod.h
new file mode 100644
index 0000000..adf49e3
--- /dev/null
+++ b/external/rapidjson/internal/strtod.h
@@ -0,0 +1,269 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_STRTOD_
+#define RAPIDJSON_STRTOD_
+
+#include "ieee754.h"
+#include "biginteger.h"
+#include "diyfp.h"
+#include "pow10.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+inline double FastPath(double significand, int exp) {
+    if (exp < -308)
+        return 0.0;
+    else if (exp >= 0)
+        return significand * internal::Pow10(exp);
+    else
+        return significand / internal::Pow10(-exp);
+}
+
+inline double StrtodNormalPrecision(double d, int p) {
+    if (p < -308) {
+        // Prevent expSum < -308, making Pow10(p) = 0
+        d = FastPath(d, -308);
+        d = FastPath(d, p + 308);
+    }
+    else
+        d = FastPath(d, p);
+    return d;
+}
+
+template <typename T>
+inline T Min3(T a, T b, T c) {
+    T m = a;
+    if (m > b) m = b;
+    if (m > c) m = c;
+    return m;
+}
+
+inline int CheckWithinHalfULP(double b, const BigInteger& d, int dExp) {
+    const Double db(b);
+    const uint64_t bInt = db.IntegerSignificand();
+    const int bExp = db.IntegerExponent();
+    const int hExp = bExp - 1;
+
+    int dS_Exp2 = 0, dS_Exp5 = 0, bS_Exp2 = 0, bS_Exp5 = 0, hS_Exp2 = 0, hS_Exp5 = 0;
+
+    // Adjust for decimal exponent
+    if (dExp >= 0) {
+        dS_Exp2 += dExp;
+        dS_Exp5 += dExp;
+    }
+    else {
+        bS_Exp2 -= dExp;
+        bS_Exp5 -= dExp;
+        hS_Exp2 -= dExp;
+        hS_Exp5 -= dExp;
+    }
+
+    // Adjust for binary exponent
+    if (bExp >= 0)
+        bS_Exp2 += bExp;
+    else {
+        dS_Exp2 -= bExp;
+        hS_Exp2 -= bExp;
+    }
+
+    // Adjust for half ulp exponent
+    if (hExp >= 0)
+        hS_Exp2 += hExp;
+    else {
+        dS_Exp2 -= hExp;
+        bS_Exp2 -= hExp;
+    }
+
+    // Remove common power of two factor from all three scaled values
+    int common_Exp2 = Min3(dS_Exp2, bS_Exp2, hS_Exp2);
+    dS_Exp2 -= common_Exp2;
+    bS_Exp2 -= common_Exp2;
+    hS_Exp2 -= common_Exp2;
+
+    BigInteger dS = d;
+    dS.MultiplyPow5(static_cast<unsigned>(dS_Exp5)) <<= static_cast<unsigned>(dS_Exp2);
+
+    BigInteger bS(bInt);
+    bS.MultiplyPow5(static_cast<unsigned>(bS_Exp5)) <<= static_cast<unsigned>(bS_Exp2);
+
+    BigInteger hS(1);
+    hS.MultiplyPow5(static_cast<unsigned>(hS_Exp5)) <<= static_cast<unsigned>(hS_Exp2);
+
+    BigInteger delta(0);
+    dS.Difference(bS, &delta);
+
+    return delta.Compare(hS);
+}
+
+inline bool StrtodFast(double d, int p, double* result) {
+    // Use fast path for string-to-double conversion if possible
+    // see http://www.exploringbinary.com/fast-path-decimal-to-floating-point-conversion/
+    if (p > 22  && p < 22 + 16) {
+        // Fast Path Cases In Disguise
+        d *= internal::Pow10(p - 22);
+        p = 22;
+    }
+
+    if (p >= -22 && p <= 22 && d <= 9007199254740991.0) { // 2^53 - 1
+        *result = FastPath(d, p);
+        return true;
+    }
+    else
+        return false;
+}
+
+// Compute an approximation and see if it is within 1/2 ULP
+inline bool StrtodDiyFp(const char* decimals, size_t length, size_t decimalPosition, int exp, double* result) {
+    uint64_t significand = 0;
+    size_t i = 0;   // 2^64 - 1 = 18446744073709551615, 1844674407370955161 = 0x1999999999999999    
+    for (; i < length; i++) {
+        if (significand  >  RAPIDJSON_UINT64_C2(0x19999999, 0x99999999) ||
+            (significand == RAPIDJSON_UINT64_C2(0x19999999, 0x99999999) && decimals[i] > '5'))
+            break;
+        significand = significand * 10u + static_cast<unsigned>(decimals[i] - '0');
+    }
+    
+    if (i < length && decimals[i] >= '5') // Rounding
+        significand++;
+
+    size_t remaining = length - i;
+    const int kUlpShift = 3;
+    const int kUlp = 1 << kUlpShift;
+    int64_t error = (remaining == 0) ? 0 : kUlp / 2;
+
+    DiyFp v(significand, 0);
+    v = v.Normalize();
+    error <<= -v.e;
+
+    const int dExp = static_cast<int>(decimalPosition) - static_cast<int>(i) + exp;
+
+    int actualExp;
+    DiyFp cachedPower = GetCachedPower10(dExp, &actualExp);
+    if (actualExp != dExp) {
+        static const DiyFp kPow10[] = {
+            DiyFp(RAPIDJSON_UINT64_C2(0xa0000000, 00000000), -60),  // 10^1
+            DiyFp(RAPIDJSON_UINT64_C2(0xc8000000, 00000000), -57),  // 10^2
+            DiyFp(RAPIDJSON_UINT64_C2(0xfa000000, 00000000), -54),  // 10^3
+            DiyFp(RAPIDJSON_UINT64_C2(0x9c400000, 00000000), -50),  // 10^4
+            DiyFp(RAPIDJSON_UINT64_C2(0xc3500000, 00000000), -47),  // 10^5
+            DiyFp(RAPIDJSON_UINT64_C2(0xf4240000, 00000000), -44),  // 10^6
+            DiyFp(RAPIDJSON_UINT64_C2(0x98968000, 00000000), -40)   // 10^7
+        };
+        int  adjustment = dExp - actualExp - 1;
+        RAPIDJSON_ASSERT(adjustment >= 0 && adjustment < 7);
+        v = v * kPow10[adjustment];
+        if (length + static_cast<unsigned>(adjustment)> 19u) // has more digits than decimal digits in 64-bit
+            error += kUlp / 2;
+    }
+
+    v = v * cachedPower;
+
+    error += kUlp + (error == 0 ? 0 : 1);
+
+    const int oldExp = v.e;
+    v = v.Normalize();
+    error <<= oldExp - v.e;
+
+    const int effectiveSignificandSize = Double::EffectiveSignificandSize(64 + v.e);
+    int precisionSize = 64 - effectiveSignificandSize;
+    if (precisionSize + kUlpShift >= 64) {
+        int scaleExp = (precisionSize + kUlpShift) - 63;
+        v.f >>= scaleExp;
+        v.e += scaleExp; 
+        error = (error >> scaleExp) + 1 + kUlp;
+        precisionSize -= scaleExp;
+    }
+
+    DiyFp rounded(v.f >> precisionSize, v.e + precisionSize);
+    const uint64_t precisionBits = (v.f & ((uint64_t(1) << precisionSize) - 1)) * kUlp;
+    const uint64_t halfWay = (uint64_t(1) << (precisionSize - 1)) * kUlp;
+    if (precisionBits >= halfWay + static_cast<unsigned>(error)) {
+        rounded.f++;
+        if (rounded.f & (DiyFp::kDpHiddenBit << 1)) { // rounding overflows mantissa (issue #340)
+            rounded.f >>= 1;
+            rounded.e++;
+        }
+    }
+
+    *result = rounded.ToDouble();
+
+    return halfWay - static_cast<unsigned>(error) >= precisionBits || precisionBits >= halfWay + static_cast<unsigned>(error);
+}
+
+inline double StrtodBigInteger(double approx, const char* decimals, size_t length, size_t decimalPosition, int exp) {
+    const BigInteger dInt(decimals, length);
+    const int dExp = static_cast<int>(decimalPosition) - static_cast<int>(length) + exp;
+    Double a(approx);
+    int cmp = CheckWithinHalfULP(a.Value(), dInt, dExp);
+    if (cmp < 0)
+        return a.Value();  // within half ULP
+    else if (cmp == 0) {
+        // Round towards even
+        if (a.Significand() & 1)
+            return a.NextPositiveDouble();
+        else
+            return a.Value();
+    }
+    else // adjustment
+        return a.NextPositiveDouble();
+}
+
+inline double StrtodFullPrecision(double d, int p, const char* decimals, size_t length, size_t decimalPosition, int exp) {
+    RAPIDJSON_ASSERT(d >= 0.0);
+    RAPIDJSON_ASSERT(length >= 1);
+
+    double result;
+    if (StrtodFast(d, p, &result))
+        return result;
+
+    // Trim leading zeros
+    while (*decimals == '0' && length > 1) {
+        length--;
+        decimals++;
+        decimalPosition--;
+    }
+
+    // Trim trailing zeros
+    while (decimals[length - 1] == '0' && length > 1) {
+        length--;
+        decimalPosition--;
+        exp++;
+    }
+
+    // Trim right-most digits
+    const int kMaxDecimalDigit = 780;
+    if (static_cast<int>(length) > kMaxDecimalDigit) {
+        int delta = (static_cast<int>(length) - kMaxDecimalDigit);
+        exp += delta;
+        decimalPosition -= static_cast<unsigned>(delta);
+        length = kMaxDecimalDigit;
+    }
+
+    // If too small, underflow to zero
+    if (int(length) + exp < -324)
+        return 0.0;
+
+    if (StrtodDiyFp(decimals, length, decimalPosition, exp, &result))
+        return result;
+
+    // Use approximation from StrtodDiyFp and make adjustment with BigInteger comparison
+    return StrtodBigInteger(result, decimals, length, decimalPosition, exp);
+}
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_STRTOD_
diff --git a/external/rapidjson/internal/swap.h b/external/rapidjson/internal/swap.h
new file mode 100644
index 0000000..666e49f
--- /dev/null
+++ b/external/rapidjson/internal/swap.h
@@ -0,0 +1,46 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+//
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_INTERNAL_SWAP_H_
+#define RAPIDJSON_INTERNAL_SWAP_H_
+
+#include "../rapidjson.h"
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(c++98-compat)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+namespace internal {
+
+//! Custom swap() to avoid dependency on C++ <algorithm> header
+/*! \tparam T Type of the arguments to swap, should be instantiated with primitive C++ types only.
+    \note This has the same semantics as std::swap().
+*/
+template <typename T>
+inline void Swap(T& a, T& b) RAPIDJSON_NOEXCEPT {
+    T tmp = a;
+        a = b;
+        b = tmp;
+}
+
+} // namespace internal
+RAPIDJSON_NAMESPACE_END
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_INTERNAL_SWAP_H_
diff --git a/external/rapidjson/istreamwrapper.h b/external/rapidjson/istreamwrapper.h
new file mode 100644
index 0000000..8639c8c
--- /dev/null
+++ b/external/rapidjson/istreamwrapper.h
@@ -0,0 +1,115 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_ISTREAMWRAPPER_H_
+#define RAPIDJSON_ISTREAMWRAPPER_H_
+
+#include "stream.h"
+#include <iosfwd>
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4351) // new behavior: elements of array 'array' will be default initialized
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Wrapper of \c std::basic_istream into RapidJSON's Stream concept.
+/*!
+    The classes can be wrapped including but not limited to:
+
+    - \c std::istringstream
+    - \c std::stringstream
+    - \c std::wistringstream
+    - \c std::wstringstream
+    - \c std::ifstream
+    - \c std::fstream
+    - \c std::wifstream
+    - \c std::wfstream
+
+    \tparam StreamType Class derived from \c std::basic_istream.
+*/
+   
+template <typename StreamType>
+class BasicIStreamWrapper {
+public:
+    typedef typename StreamType::char_type Ch;
+    BasicIStreamWrapper(StreamType& stream) : stream_(stream), count_(), peekBuffer_() {}
+
+    Ch Peek() const { 
+        typename StreamType::int_type c = stream_.peek();
+        return RAPIDJSON_LIKELY(c != StreamType::traits_type::eof()) ? static_cast<Ch>(c) : static_cast<Ch>('\0');
+    }
+
+    Ch Take() { 
+        typename StreamType::int_type c = stream_.get();
+        if (RAPIDJSON_LIKELY(c != StreamType::traits_type::eof())) {
+            count_++;
+            return static_cast<Ch>(c);
+        }
+        else
+            return '\0';
+    }
+
+    // tellg() may return -1 when failed. So we count by ourself.
+    size_t Tell() const { return count_; }
+
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    void Put(Ch) { RAPIDJSON_ASSERT(false); }
+    void Flush() { RAPIDJSON_ASSERT(false); }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+    // For encoding detection only.
+    const Ch* Peek4() const {
+        RAPIDJSON_ASSERT(sizeof(Ch) == 1); // Only usable for byte stream.
+        int i;
+        bool hasError = false;
+        for (i = 0; i < 4; ++i) {
+            typename StreamType::int_type c = stream_.get();
+            if (c == StreamType::traits_type::eof()) {
+                hasError = true;
+                stream_.clear();
+                break;
+            }
+            peekBuffer_[i] = static_cast<Ch>(c);
+        }
+        for (--i; i >= 0; --i)
+            stream_.putback(peekBuffer_[i]);
+        return !hasError ? peekBuffer_ : 0;
+    }
+
+private:
+    BasicIStreamWrapper(const BasicIStreamWrapper&);
+    BasicIStreamWrapper& operator=(const BasicIStreamWrapper&);
+
+    StreamType& stream_;
+    size_t count_;  //!< Number of characters read. Note:
+    mutable Ch peekBuffer_[4];
+};
+
+typedef BasicIStreamWrapper<std::istream> IStreamWrapper;
+typedef BasicIStreamWrapper<std::wistream> WIStreamWrapper;
+
+#if defined(__clang__) || defined(_MSC_VER)
+RAPIDJSON_DIAG_POP
+#endif
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_ISTREAMWRAPPER_H_
diff --git a/external/rapidjson/memorybuffer.h b/external/rapidjson/memorybuffer.h
new file mode 100644
index 0000000..39bee1d
--- /dev/null
+++ b/external/rapidjson/memorybuffer.h
@@ -0,0 +1,70 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_MEMORYBUFFER_H_
+#define RAPIDJSON_MEMORYBUFFER_H_
+
+#include "stream.h"
+#include "internal/stack.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Represents an in-memory output byte stream.
+/*!
+    This class is mainly for being wrapped by EncodedOutputStream or AutoUTFOutputStream.
+
+    It is similar to FileWriteBuffer but the destination is an in-memory buffer instead of a file.
+
+    Differences between MemoryBuffer and StringBuffer:
+    1. StringBuffer has Encoding but MemoryBuffer is only a byte buffer. 
+    2. StringBuffer::GetString() returns a null-terminated string. MemoryBuffer::GetBuffer() returns a buffer without terminator.
+
+    \tparam Allocator type for allocating memory buffer.
+    \note implements Stream concept
+*/
+template <typename Allocator = CrtAllocator>
+struct GenericMemoryBuffer {
+    typedef char Ch; // byte
+
+    GenericMemoryBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
+
+    void Put(Ch c) { *stack_.template Push<Ch>() = c; }
+    void Flush() {}
+
+    void Clear() { stack_.Clear(); }
+    void ShrinkToFit() { stack_.ShrinkToFit(); }
+    Ch* Push(size_t count) { return stack_.template Push<Ch>(count); }
+    void Pop(size_t count) { stack_.template Pop<Ch>(count); }
+
+    const Ch* GetBuffer() const {
+        return stack_.template Bottom<Ch>();
+    }
+
+    size_t GetSize() const { return stack_.GetSize(); }
+
+    static const size_t kDefaultCapacity = 256;
+    mutable internal::Stack<Allocator> stack_;
+};
+
+typedef GenericMemoryBuffer<> MemoryBuffer;
+
+//! Implement specialized version of PutN() with memset() for better performance.
+template<>
+inline void PutN(MemoryBuffer& memoryBuffer, char c, size_t n) {
+    std::memset(memoryBuffer.stack_.Push<char>(n), c, n * sizeof(c));
+}
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_MEMORYBUFFER_H_
diff --git a/external/rapidjson/memorystream.h b/external/rapidjson/memorystream.h
new file mode 100644
index 0000000..1d71d8a
--- /dev/null
+++ b/external/rapidjson/memorystream.h
@@ -0,0 +1,71 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_MEMORYSTREAM_H_
+#define RAPIDJSON_MEMORYSTREAM_H_
+
+#include "stream.h"
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(unreachable-code)
+RAPIDJSON_DIAG_OFF(missing-noreturn)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Represents an in-memory input byte stream.
+/*!
+    This class is mainly for being wrapped by EncodedInputStream or AutoUTFInputStream.
+
+    It is similar to FileReadBuffer but the source is an in-memory buffer instead of a file.
+
+    Differences between MemoryStream and StringStream:
+    1. StringStream has encoding but MemoryStream is a byte stream.
+    2. MemoryStream needs size of the source buffer and the buffer don't need to be null terminated. StringStream assume null-terminated string as source.
+    3. MemoryStream supports Peek4() for encoding detection. StringStream is specified with an encoding so it should not have Peek4().
+    \note implements Stream concept
+*/
+struct MemoryStream {
+    typedef char Ch; // byte
+
+    MemoryStream(const Ch *src, size_t size) : src_(src), begin_(src), end_(src + size), size_(size) {}
+
+    Ch Peek() const { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_; }
+    Ch Take() { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_++; }
+    size_t Tell() const { return static_cast<size_t>(src_ - begin_); }
+
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    void Put(Ch) { RAPIDJSON_ASSERT(false); }
+    void Flush() { RAPIDJSON_ASSERT(false); }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+    // For encoding detection only.
+    const Ch* Peek4() const {
+        return Tell() + 4 <= size_ ? src_ : 0;
+    }
+
+    const Ch* src_;     //!< Current read position.
+    const Ch* begin_;   //!< Original head of the string.
+    const Ch* end_;     //!< End of stream.
+    size_t size_;       //!< Size of the stream.
+};
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_MEMORYBUFFER_H_
diff --git a/external/rapidjson/msinttypes/inttypes.h b/external/rapidjson/msinttypes/inttypes.h
new file mode 100644
index 0000000..1811128
--- /dev/null
+++ b/external/rapidjson/msinttypes/inttypes.h
@@ -0,0 +1,316 @@
+// ISO C9x  compliant inttypes.h for Microsoft Visual Studio
+// Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124 
+// 
+//  Copyright (c) 2006-2013 Alexander Chemeris
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// 
+//   1. Redistributions of source code must retain the above copyright notice,
+//      this list of conditions and the following disclaimer.
+// 
+//   2. Redistributions in binary form must reproduce the above copyright
+//      notice, this list of conditions and the following disclaimer in the
+//      documentation and/or other materials provided with the distribution.
+// 
+//   3. Neither the name of the product nor the names of its contributors may
+//      be used to endorse or promote products derived from this software
+//      without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+// The above software in this distribution may have been modified by 
+// THL A29 Limited ("Tencent Modifications"). 
+// All Tencent Modifications are Copyright (C) 2015 THL A29 Limited.
+
+#ifndef _MSC_VER // [
+#error "Use this header only with Microsoft Visual C++ compilers!"
+#endif // _MSC_VER ]
+
+#ifndef _MSC_INTTYPES_H_ // [
+#define _MSC_INTTYPES_H_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+#include "stdint.h"
+
+// miloyip: VC supports inttypes.h since VC2013
+#if _MSC_VER >= 1800
+#include <inttypes.h>
+#else
+
+// 7.8 Format conversion of integer types
+
+typedef struct {
+   intmax_t quot;
+   intmax_t rem;
+} imaxdiv_t;
+
+// 7.8.1 Macros for format specifiers
+
+#if !defined(__cplusplus) || defined(__STDC_FORMAT_MACROS) // [   See footnote 185 at page 198
+
+// The fprintf macros for signed integers are:
+#define PRId8       "d"
+#define PRIi8       "i"
+#define PRIdLEAST8  "d"
+#define PRIiLEAST8  "i"
+#define PRIdFAST8   "d"
+#define PRIiFAST8   "i"
+
+#define PRId16       "hd"
+#define PRIi16       "hi"
+#define PRIdLEAST16  "hd"
+#define PRIiLEAST16  "hi"
+#define PRIdFAST16   "hd"
+#define PRIiFAST16   "hi"
+
+#define PRId32       "I32d"
+#define PRIi32       "I32i"
+#define PRIdLEAST32  "I32d"
+#define PRIiLEAST32  "I32i"
+#define PRIdFAST32   "I32d"
+#define PRIiFAST32   "I32i"
+
+#define PRId64       "I64d"
+#define PRIi64       "I64i"
+#define PRIdLEAST64  "I64d"
+#define PRIiLEAST64  "I64i"
+#define PRIdFAST64   "I64d"
+#define PRIiFAST64   "I64i"
+
+#define PRIdMAX     "I64d"
+#define PRIiMAX     "I64i"
+
+#define PRIdPTR     "Id"
+#define PRIiPTR     "Ii"
+
+// The fprintf macros for unsigned integers are:
+#define PRIo8       "o"
+#define PRIu8       "u"
+#define PRIx8       "x"
+#define PRIX8       "X"
+#define PRIoLEAST8  "o"
+#define PRIuLEAST8  "u"
+#define PRIxLEAST8  "x"
+#define PRIXLEAST8  "X"
+#define PRIoFAST8   "o"
+#define PRIuFAST8   "u"
+#define PRIxFAST8   "x"
+#define PRIXFAST8   "X"
+
+#define PRIo16       "ho"
+#define PRIu16       "hu"
+#define PRIx16       "hx"
+#define PRIX16       "hX"
+#define PRIoLEAST16  "ho"
+#define PRIuLEAST16  "hu"
+#define PRIxLEAST16  "hx"
+#define PRIXLEAST16  "hX"
+#define PRIoFAST16   "ho"
+#define PRIuFAST16   "hu"
+#define PRIxFAST16   "hx"
+#define PRIXFAST16   "hX"
+
+#define PRIo32       "I32o"
+#define PRIu32       "I32u"
+#define PRIx32       "I32x"
+#define PRIX32       "I32X"
+#define PRIoLEAST32  "I32o"
+#define PRIuLEAST32  "I32u"
+#define PRIxLEAST32  "I32x"
+#define PRIXLEAST32  "I32X"
+#define PRIoFAST32   "I32o"
+#define PRIuFAST32   "I32u"
+#define PRIxFAST32   "I32x"
+#define PRIXFAST32   "I32X"
+
+#define PRIo64       "I64o"
+#define PRIu64       "I64u"
+#define PRIx64       "I64x"
+#define PRIX64       "I64X"
+#define PRIoLEAST64  "I64o"
+#define PRIuLEAST64  "I64u"
+#define PRIxLEAST64  "I64x"
+#define PRIXLEAST64  "I64X"
+#define PRIoFAST64   "I64o"
+#define PRIuFAST64   "I64u"
+#define PRIxFAST64   "I64x"
+#define PRIXFAST64   "I64X"
+
+#define PRIoMAX     "I64o"
+#define PRIuMAX     "I64u"
+#define PRIxMAX     "I64x"
+#define PRIXMAX     "I64X"
+
+#define PRIoPTR     "Io"
+#define PRIuPTR     "Iu"
+#define PRIxPTR     "Ix"
+#define PRIXPTR     "IX"
+
+// The fscanf macros for signed integers are:
+#define SCNd8       "d"
+#define SCNi8       "i"
+#define SCNdLEAST8  "d"
+#define SCNiLEAST8  "i"
+#define SCNdFAST8   "d"
+#define SCNiFAST8   "i"
+
+#define SCNd16       "hd"
+#define SCNi16       "hi"
+#define SCNdLEAST16  "hd"
+#define SCNiLEAST16  "hi"
+#define SCNdFAST16   "hd"
+#define SCNiFAST16   "hi"
+
+#define SCNd32       "ld"
+#define SCNi32       "li"
+#define SCNdLEAST32  "ld"
+#define SCNiLEAST32  "li"
+#define SCNdFAST32   "ld"
+#define SCNiFAST32   "li"
+
+#define SCNd64       "I64d"
+#define SCNi64       "I64i"
+#define SCNdLEAST64  "I64d"
+#define SCNiLEAST64  "I64i"
+#define SCNdFAST64   "I64d"
+#define SCNiFAST64   "I64i"
+
+#define SCNdMAX     "I64d"
+#define SCNiMAX     "I64i"
+
+#ifdef _WIN64 // [
+#  define SCNdPTR     "I64d"
+#  define SCNiPTR     "I64i"
+#else  // _WIN64 ][
+#  define SCNdPTR     "ld"
+#  define SCNiPTR     "li"
+#endif  // _WIN64 ]
+
+// The fscanf macros for unsigned integers are:
+#define SCNo8       "o"
+#define SCNu8       "u"
+#define SCNx8       "x"
+#define SCNX8       "X"
+#define SCNoLEAST8  "o"
+#define SCNuLEAST8  "u"
+#define SCNxLEAST8  "x"
+#define SCNXLEAST8  "X"
+#define SCNoFAST8   "o"
+#define SCNuFAST8   "u"
+#define SCNxFAST8   "x"
+#define SCNXFAST8   "X"
+
+#define SCNo16       "ho"
+#define SCNu16       "hu"
+#define SCNx16       "hx"
+#define SCNX16       "hX"
+#define SCNoLEAST16  "ho"
+#define SCNuLEAST16  "hu"
+#define SCNxLEAST16  "hx"
+#define SCNXLEAST16  "hX"
+#define SCNoFAST16   "ho"
+#define SCNuFAST16   "hu"
+#define SCNxFAST16   "hx"
+#define SCNXFAST16   "hX"
+
+#define SCNo32       "lo"
+#define SCNu32       "lu"
+#define SCNx32       "lx"
+#define SCNX32       "lX"
+#define SCNoLEAST32  "lo"
+#define SCNuLEAST32  "lu"
+#define SCNxLEAST32  "lx"
+#define SCNXLEAST32  "lX"
+#define SCNoFAST32   "lo"
+#define SCNuFAST32   "lu"
+#define SCNxFAST32   "lx"
+#define SCNXFAST32   "lX"
+
+#define SCNo64       "I64o"
+#define SCNu64       "I64u"
+#define SCNx64       "I64x"
+#define SCNX64       "I64X"
+#define SCNoLEAST64  "I64o"
+#define SCNuLEAST64  "I64u"
+#define SCNxLEAST64  "I64x"
+#define SCNXLEAST64  "I64X"
+#define SCNoFAST64   "I64o"
+#define SCNuFAST64   "I64u"
+#define SCNxFAST64   "I64x"
+#define SCNXFAST64   "I64X"
+
+#define SCNoMAX     "I64o"
+#define SCNuMAX     "I64u"
+#define SCNxMAX     "I64x"
+#define SCNXMAX     "I64X"
+
+#ifdef _WIN64 // [
+#  define SCNoPTR     "I64o"
+#  define SCNuPTR     "I64u"
+#  define SCNxPTR     "I64x"
+#  define SCNXPTR     "I64X"
+#else  // _WIN64 ][
+#  define SCNoPTR     "lo"
+#  define SCNuPTR     "lu"
+#  define SCNxPTR     "lx"
+#  define SCNXPTR     "lX"
+#endif  // _WIN64 ]
+
+#endif // __STDC_FORMAT_MACROS ]
+
+// 7.8.2 Functions for greatest-width integer types
+
+// 7.8.2.1 The imaxabs function
+#define imaxabs _abs64
+
+// 7.8.2.2 The imaxdiv function
+
+// This is modified version of div() function from Microsoft's div.c found
+// in %MSVC.NET%\crt\src\div.c
+#ifdef STATIC_IMAXDIV // [
+static
+#else // STATIC_IMAXDIV ][
+_inline
+#endif // STATIC_IMAXDIV ]
+imaxdiv_t __cdecl imaxdiv(intmax_t numer, intmax_t denom)
+{
+   imaxdiv_t result;
+
+   result.quot = numer / denom;
+   result.rem = numer % denom;
+
+   if (numer < 0 && result.rem > 0) {
+      // did division wrong; must fix up
+      ++result.quot;
+      result.rem -= denom;
+   }
+
+   return result;
+}
+
+// 7.8.2.3 The strtoimax and strtoumax functions
+#define strtoimax _strtoi64
+#define strtoumax _strtoui64
+
+// 7.8.2.4 The wcstoimax and wcstoumax functions
+#define wcstoimax _wcstoi64
+#define wcstoumax _wcstoui64
+
+#endif // _MSC_VER >= 1800
+
+#endif // _MSC_INTTYPES_H_ ]
diff --git a/external/rapidjson/msinttypes/stdint.h b/external/rapidjson/msinttypes/stdint.h
new file mode 100644
index 0000000..3d4477b
--- /dev/null
+++ b/external/rapidjson/msinttypes/stdint.h
@@ -0,0 +1,300 @@
+// ISO C9x  compliant stdint.h for Microsoft Visual Studio
+// Based on ISO/IEC 9899:TC2 Committee draft (May 6, 2005) WG14/N1124 
+// 
+//  Copyright (c) 2006-2013 Alexander Chemeris
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// 
+//   1. Redistributions of source code must retain the above copyright notice,
+//      this list of conditions and the following disclaimer.
+// 
+//   2. Redistributions in binary form must reproduce the above copyright
+//      notice, this list of conditions and the following disclaimer in the
+//      documentation and/or other materials provided with the distribution.
+// 
+//   3. Neither the name of the product nor the names of its contributors may
+//      be used to endorse or promote products derived from this software
+//      without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+// EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
+// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+// The above software in this distribution may have been modified by 
+// THL A29 Limited ("Tencent Modifications"). 
+// All Tencent Modifications are Copyright (C) 2015 THL A29 Limited.
+
+#ifndef _MSC_VER // [
+#error "Use this header only with Microsoft Visual C++ compilers!"
+#endif // _MSC_VER ]
+
+#ifndef _MSC_STDINT_H_ // [
+#define _MSC_STDINT_H_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+// miloyip: Originally Visual Studio 2010 uses its own stdint.h. However it generates warning with INT64_C(), so change to use this file for vs2010.
+#if _MSC_VER >= 1600 // [
+#include <stdint.h>
+
+#if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) // [   See footnote 224 at page 260
+
+#undef INT8_C
+#undef INT16_C
+#undef INT32_C
+#undef INT64_C
+#undef UINT8_C
+#undef UINT16_C
+#undef UINT32_C
+#undef UINT64_C
+
+// 7.18.4.1 Macros for minimum-width integer constants
+
+#define INT8_C(val)  val##i8
+#define INT16_C(val) val##i16
+#define INT32_C(val) val##i32
+#define INT64_C(val) val##i64
+
+#define UINT8_C(val)  val##ui8
+#define UINT16_C(val) val##ui16
+#define UINT32_C(val) val##ui32
+#define UINT64_C(val) val##ui64
+
+// 7.18.4.2 Macros for greatest-width integer constants
+// These #ifndef's are needed to prevent collisions with <boost/cstdint.hpp>.
+// Check out Issue 9 for the details.
+#ifndef INTMAX_C //   [
+#  define INTMAX_C   INT64_C
+#endif // INTMAX_C    ]
+#ifndef UINTMAX_C //  [
+#  define UINTMAX_C  UINT64_C
+#endif // UINTMAX_C   ]
+
+#endif // __STDC_CONSTANT_MACROS ]
+
+#else // ] _MSC_VER >= 1700 [
+
+#include <limits.h>
+
+// For Visual Studio 6 in C++ mode and for many Visual Studio versions when
+// compiling for ARM we have to wrap <wchar.h> include with 'extern "C++" {}'
+// or compiler would give many errors like this:
+//   error C2733: second C linkage of overloaded function 'wmemchr' not allowed
+#if defined(__cplusplus) && !defined(_M_ARM)
+extern "C" {
+#endif
+#  include <wchar.h>
+#if defined(__cplusplus) && !defined(_M_ARM)
+}
+#endif
+
+// Define _W64 macros to mark types changing their size, like intptr_t.
+#ifndef _W64
+#  if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
+#     define _W64 __w64
+#  else
+#     define _W64
+#  endif
+#endif
+
+
+// 7.18.1 Integer types
+
+// 7.18.1.1 Exact-width integer types
+
+// Visual Studio 6 and Embedded Visual C++ 4 doesn't
+// realize that, e.g. char has the same size as __int8
+// so we give up on __intX for them.
+#if (_MSC_VER < 1300)
+   typedef signed char       int8_t;
+   typedef signed short      int16_t;
+   typedef signed int        int32_t;
+   typedef unsigned char     uint8_t;
+   typedef unsigned short    uint16_t;
+   typedef unsigned int      uint32_t;
+#else
+   typedef signed __int8     int8_t;
+   typedef signed __int16    int16_t;
+   typedef signed __int32    int32_t;
+   typedef unsigned __int8   uint8_t;
+   typedef unsigned __int16  uint16_t;
+   typedef unsigned __int32  uint32_t;
+#endif
+typedef signed __int64       int64_t;
+typedef unsigned __int64     uint64_t;
+
+
+// 7.18.1.2 Minimum-width integer types
+typedef int8_t    int_least8_t;
+typedef int16_t   int_least16_t;
+typedef int32_t   int_least32_t;
+typedef int64_t   int_least64_t;
+typedef uint8_t   uint_least8_t;
+typedef uint16_t  uint_least16_t;
+typedef uint32_t  uint_least32_t;
+typedef uint64_t  uint_least64_t;
+
+// 7.18.1.3 Fastest minimum-width integer types
+typedef int8_t    int_fast8_t;
+typedef int16_t   int_fast16_t;
+typedef int32_t   int_fast32_t;
+typedef int64_t   int_fast64_t;
+typedef uint8_t   uint_fast8_t;
+typedef uint16_t  uint_fast16_t;
+typedef uint32_t  uint_fast32_t;
+typedef uint64_t  uint_fast64_t;
+
+// 7.18.1.4 Integer types capable of holding object pointers
+#ifdef _WIN64 // [
+   typedef signed __int64    intptr_t;
+   typedef unsigned __int64  uintptr_t;
+#else // _WIN64 ][
+   typedef _W64 signed int   intptr_t;
+   typedef _W64 unsigned int uintptr_t;
+#endif // _WIN64 ]
+
+// 7.18.1.5 Greatest-width integer types
+typedef int64_t   intmax_t;
+typedef uint64_t  uintmax_t;
+
+
+// 7.18.2 Limits of specified-width integer types
+
+#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) // [   See footnote 220 at page 257 and footnote 221 at page 259
+
+// 7.18.2.1 Limits of exact-width integer types
+#define INT8_MIN     ((int8_t)_I8_MIN)
+#define INT8_MAX     _I8_MAX
+#define INT16_MIN    ((int16_t)_I16_MIN)
+#define INT16_MAX    _I16_MAX
+#define INT32_MIN    ((int32_t)_I32_MIN)
+#define INT32_MAX    _I32_MAX
+#define INT64_MIN    ((int64_t)_I64_MIN)
+#define INT64_MAX    _I64_MAX
+#define UINT8_MAX    _UI8_MAX
+#define UINT16_MAX   _UI16_MAX
+#define UINT32_MAX   _UI32_MAX
+#define UINT64_MAX   _UI64_MAX
+
+// 7.18.2.2 Limits of minimum-width integer types
+#define INT_LEAST8_MIN    INT8_MIN
+#define INT_LEAST8_MAX    INT8_MAX
+#define INT_LEAST16_MIN   INT16_MIN
+#define INT_LEAST16_MAX   INT16_MAX
+#define INT_LEAST32_MIN   INT32_MIN
+#define INT_LEAST32_MAX   INT32_MAX
+#define INT_LEAST64_MIN   INT64_MIN
+#define INT_LEAST64_MAX   INT64_MAX
+#define UINT_LEAST8_MAX   UINT8_MAX
+#define UINT_LEAST16_MAX  UINT16_MAX
+#define UINT_LEAST32_MAX  UINT32_MAX
+#define UINT_LEAST64_MAX  UINT64_MAX
+
+// 7.18.2.3 Limits of fastest minimum-width integer types
+#define INT_FAST8_MIN    INT8_MIN
+#define INT_FAST8_MAX    INT8_MAX
+#define INT_FAST16_MIN   INT16_MIN
+#define INT_FAST16_MAX   INT16_MAX
+#define INT_FAST32_MIN   INT32_MIN
+#define INT_FAST32_MAX   INT32_MAX
+#define INT_FAST64_MIN   INT64_MIN
+#define INT_FAST64_MAX   INT64_MAX
+#define UINT_FAST8_MAX   UINT8_MAX
+#define UINT_FAST16_MAX  UINT16_MAX
+#define UINT_FAST32_MAX  UINT32_MAX
+#define UINT_FAST64_MAX  UINT64_MAX
+
+// 7.18.2.4 Limits of integer types capable of holding object pointers
+#ifdef _WIN64 // [
+#  define INTPTR_MIN   INT64_MIN
+#  define INTPTR_MAX   INT64_MAX
+#  define UINTPTR_MAX  UINT64_MAX
+#else // _WIN64 ][
+#  define INTPTR_MIN   INT32_MIN
+#  define INTPTR_MAX   INT32_MAX
+#  define UINTPTR_MAX  UINT32_MAX
+#endif // _WIN64 ]
+
+// 7.18.2.5 Limits of greatest-width integer types
+#define INTMAX_MIN   INT64_MIN
+#define INTMAX_MAX   INT64_MAX
+#define UINTMAX_MAX  UINT64_MAX
+
+// 7.18.3 Limits of other integer types
+
+#ifdef _WIN64 // [
+#  define PTRDIFF_MIN  _I64_MIN
+#  define PTRDIFF_MAX  _I64_MAX
+#else  // _WIN64 ][
+#  define PTRDIFF_MIN  _I32_MIN
+#  define PTRDIFF_MAX  _I32_MAX
+#endif  // _WIN64 ]
+
+#define SIG_ATOMIC_MIN  INT_MIN
+#define SIG_ATOMIC_MAX  INT_MAX
+
+#ifndef SIZE_MAX // [
+#  ifdef _WIN64 // [
+#     define SIZE_MAX  _UI64_MAX
+#  else // _WIN64 ][
+#     define SIZE_MAX  _UI32_MAX
+#  endif // _WIN64 ]
+#endif // SIZE_MAX ]
+
+// WCHAR_MIN and WCHAR_MAX are also defined in <wchar.h>
+#ifndef WCHAR_MIN // [
+#  define WCHAR_MIN  0
+#endif  // WCHAR_MIN ]
+#ifndef WCHAR_MAX // [
+#  define WCHAR_MAX  _UI16_MAX
+#endif  // WCHAR_MAX ]
+
+#define WINT_MIN  0
+#define WINT_MAX  _UI16_MAX
+
+#endif // __STDC_LIMIT_MACROS ]
+
+
+// 7.18.4 Limits of other integer types
+
+#if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) // [   See footnote 224 at page 260
+
+// 7.18.4.1 Macros for minimum-width integer constants
+
+#define INT8_C(val)  val##i8
+#define INT16_C(val) val##i16
+#define INT32_C(val) val##i32
+#define INT64_C(val) val##i64
+
+#define UINT8_C(val)  val##ui8
+#define UINT16_C(val) val##ui16
+#define UINT32_C(val) val##ui32
+#define UINT64_C(val) val##ui64
+
+// 7.18.4.2 Macros for greatest-width integer constants
+// These #ifndef's are needed to prevent collisions with <boost/cstdint.hpp>.
+// Check out Issue 9 for the details.
+#ifndef INTMAX_C //   [
+#  define INTMAX_C   INT64_C
+#endif // INTMAX_C    ]
+#ifndef UINTMAX_C //  [
+#  define UINTMAX_C  UINT64_C
+#endif // UINTMAX_C   ]
+
+#endif // __STDC_CONSTANT_MACROS ]
+
+#endif // _MSC_VER >= 1600 ]
+
+#endif // _MSC_STDINT_H_ ]
diff --git a/external/rapidjson/ostreamwrapper.h b/external/rapidjson/ostreamwrapper.h
new file mode 100644
index 0000000..6f4667c
--- /dev/null
+++ b/external/rapidjson/ostreamwrapper.h
@@ -0,0 +1,81 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_OSTREAMWRAPPER_H_
+#define RAPIDJSON_OSTREAMWRAPPER_H_
+
+#include "stream.h"
+#include <iosfwd>
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Wrapper of \c std::basic_ostream into RapidJSON's Stream concept.
+/*!
+    The classes can be wrapped including but not limited to:
+
+    - \c std::ostringstream
+    - \c std::stringstream
+    - \c std::wpstringstream
+    - \c std::wstringstream
+    - \c std::ifstream
+    - \c std::fstream
+    - \c std::wofstream
+    - \c std::wfstream
+
+    \tparam StreamType Class derived from \c std::basic_ostream.
+*/
+   
+template <typename StreamType>
+class BasicOStreamWrapper {
+public:
+    typedef typename StreamType::char_type Ch;
+    BasicOStreamWrapper(StreamType& stream) : stream_(stream) {}
+
+    void Put(Ch c) {
+        stream_.put(c);
+    }
+
+    void Flush() {
+        stream_.flush();
+    }
+
+    // Not implemented
+    char Peek() const { RAPIDJSON_ASSERT(false); return 0; }
+    char Take() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t Tell() const { RAPIDJSON_ASSERT(false); return 0; }
+    char* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    size_t PutEnd(char*) { RAPIDJSON_ASSERT(false); return 0; }
+
+private:
+    BasicOStreamWrapper(const BasicOStreamWrapper&);
+    BasicOStreamWrapper& operator=(const BasicOStreamWrapper&);
+
+    StreamType& stream_;
+};
+
+typedef BasicOStreamWrapper<std::ostream> OStreamWrapper;
+typedef BasicOStreamWrapper<std::wostream> WOStreamWrapper;
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_OSTREAMWRAPPER_H_
diff --git a/external/rapidjson/pointer.h b/external/rapidjson/pointer.h
new file mode 100644
index 0000000..0f377ef
--- /dev/null
+++ b/external/rapidjson/pointer.h
@@ -0,0 +1,1358 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_POINTER_H_
+#define RAPIDJSON_POINTER_H_
+
+#include "document.h"
+#include "internal/itoa.h"
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(switch-enum)
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4512) // assignment operator could not be generated
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+static const SizeType kPointerInvalidIndex = ~SizeType(0);  //!< Represents an invalid index in GenericPointer::Token
+
+//! Error code of parsing.
+/*! \ingroup RAPIDJSON_ERRORS
+    \see GenericPointer::GenericPointer, GenericPointer::GetParseErrorCode
+*/
+enum PointerParseErrorCode {
+    kPointerParseErrorNone = 0,                     //!< The parse is successful
+
+    kPointerParseErrorTokenMustBeginWithSolidus,    //!< A token must begin with a '/'
+    kPointerParseErrorInvalidEscape,                //!< Invalid escape
+    kPointerParseErrorInvalidPercentEncoding,       //!< Invalid percent encoding in URI fragment
+    kPointerParseErrorCharacterMustPercentEncode    //!< A character must percent encoded in URI fragment
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericPointer
+
+//! Represents a JSON Pointer. Use Pointer for UTF8 encoding and default allocator.
+/*!
+    This class implements RFC 6901 "JavaScript Object Notation (JSON) Pointer" 
+    (https://tools.ietf.org/html/rfc6901).
+
+    A JSON pointer is for identifying a specific value in a JSON document
+    (GenericDocument). It can simplify coding of DOM tree manipulation, because it
+    can access multiple-level depth of DOM tree with single API call.
+
+    After it parses a string representation (e.g. "/foo/0" or URI fragment 
+    representation (e.g. "#/foo/0") into its internal representation (tokens),
+    it can be used to resolve a specific value in multiple documents, or sub-tree 
+    of documents.
+
+    Contrary to GenericValue, Pointer can be copy constructed and copy assigned.
+    Apart from assignment, a Pointer cannot be modified after construction.
+
+    Although Pointer is very convenient, please aware that constructing Pointer
+    involves parsing and dynamic memory allocation. A special constructor with user-
+    supplied tokens eliminates these.
+
+    GenericPointer depends on GenericDocument and GenericValue.
+    
+    \tparam ValueType The value type of the DOM tree. E.g. GenericValue<UTF8<> >
+    \tparam Allocator The allocator type for allocating memory for internal representation.
+    
+    \note GenericPointer uses same encoding of ValueType.
+    However, Allocator of GenericPointer is independent of Allocator of Value.
+*/
+template <typename ValueType, typename Allocator = CrtAllocator>
+class GenericPointer {
+public:
+    typedef typename ValueType::EncodingType EncodingType;  //!< Encoding type from Value
+    typedef typename ValueType::Ch Ch;                      //!< Character type from Value
+
+    //! A token is the basic units of internal representation.
+    /*!
+        A JSON pointer string representation "/foo/123" is parsed to two tokens: 
+        "foo" and 123. 123 will be represented in both numeric form and string form.
+        They are resolved according to the actual value type (object or array).
+
+        For token that are not numbers, or the numeric value is out of bound
+        (greater than limits of SizeType), they are only treated as string form
+        (i.e. the token's index will be equal to kPointerInvalidIndex).
+
+        This struct is public so that user can create a Pointer without parsing and 
+        allocation, using a special constructor.
+    */
+    struct Token {
+        const Ch* name;             //!< Name of the token. It has null character at the end but it can contain null character.
+        SizeType length;            //!< Length of the name.
+        SizeType index;             //!< A valid array index, if it is not equal to kPointerInvalidIndex.
+    };
+
+    //!@name Constructors and destructor.
+    //@{
+
+    //! Default constructor.
+    GenericPointer(Allocator* allocator = 0) : allocator_(allocator), ownAllocator_(), nameBuffer_(), tokens_(), tokenCount_(), parseErrorOffset_(), parseErrorCode_(kPointerParseErrorNone) {}
+
+    //! Constructor that parses a string or URI fragment representation.
+    /*!
+        \param source A null-terminated, string or URI fragment representation of JSON pointer.
+        \param allocator User supplied allocator for this pointer. If no allocator is provided, it creates a self-owned one.
+    */
+    explicit GenericPointer(const Ch* source, Allocator* allocator = 0) : allocator_(allocator), ownAllocator_(), nameBuffer_(), tokens_(), tokenCount_(), parseErrorOffset_(), parseErrorCode_(kPointerParseErrorNone) {
+        Parse(source, internal::StrLen(source));
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Constructor that parses a string or URI fragment representation.
+    /*!
+        \param source A string or URI fragment representation of JSON pointer.
+        \param allocator User supplied allocator for this pointer. If no allocator is provided, it creates a self-owned one.
+        \note Requires the definition of the preprocessor symbol \ref RAPIDJSON_HAS_STDSTRING.
+    */
+    explicit GenericPointer(const std::basic_string<Ch>& source, Allocator* allocator = 0) : allocator_(allocator), ownAllocator_(), nameBuffer_(), tokens_(), tokenCount_(), parseErrorOffset_(), parseErrorCode_(kPointerParseErrorNone) {
+        Parse(source.c_str(), source.size());
+    }
+#endif
+
+    //! Constructor that parses a string or URI fragment representation, with length of the source string.
+    /*!
+        \param source A string or URI fragment representation of JSON pointer.
+        \param length Length of source.
+        \param allocator User supplied allocator for this pointer. If no allocator is provided, it creates a self-owned one.
+        \note Slightly faster than the overload without length.
+    */
+    GenericPointer(const Ch* source, size_t length, Allocator* allocator = 0) : allocator_(allocator), ownAllocator_(), nameBuffer_(), tokens_(), tokenCount_(), parseErrorOffset_(), parseErrorCode_(kPointerParseErrorNone) {
+        Parse(source, length);
+    }
+
+    //! Constructor with user-supplied tokens.
+    /*!
+        This constructor let user supplies const array of tokens.
+        This prevents the parsing process and eliminates allocation.
+        This is preferred for memory constrained environments.
+
+        \param tokens An constant array of tokens representing the JSON pointer.
+        \param tokenCount Number of tokens.
+
+        \b Example
+        \code
+        #define NAME(s) { s, sizeof(s) / sizeof(s[0]) - 1, kPointerInvalidIndex }
+        #define INDEX(i) { #i, sizeof(#i) - 1, i }
+
+        static const Pointer::Token kTokens[] = { NAME("foo"), INDEX(123) };
+        static const Pointer p(kTokens, sizeof(kTokens) / sizeof(kTokens[0]));
+        // Equivalent to static const Pointer p("/foo/123");
+
+        #undef NAME
+        #undef INDEX
+        \endcode
+    */
+    GenericPointer(const Token* tokens, size_t tokenCount) : allocator_(), ownAllocator_(), nameBuffer_(), tokens_(const_cast<Token*>(tokens)), tokenCount_(tokenCount), parseErrorOffset_(), parseErrorCode_(kPointerParseErrorNone) {}
+
+    //! Copy constructor.
+    GenericPointer(const GenericPointer& rhs, Allocator* allocator = 0) : allocator_(allocator), ownAllocator_(), nameBuffer_(), tokens_(), tokenCount_(), parseErrorOffset_(), parseErrorCode_(kPointerParseErrorNone) {
+        *this = rhs;
+    }
+
+    //! Destructor.
+    ~GenericPointer() {
+        if (nameBuffer_)    // If user-supplied tokens constructor is used, nameBuffer_ is nullptr and tokens_ are not deallocated.
+            Allocator::Free(tokens_);
+        RAPIDJSON_DELETE(ownAllocator_);
+    }
+
+    //! Assignment operator.
+    GenericPointer& operator=(const GenericPointer& rhs) {
+        if (this != &rhs) {
+            // Do not delete ownAllcator
+            if (nameBuffer_)
+                Allocator::Free(tokens_);
+
+            tokenCount_ = rhs.tokenCount_;
+            parseErrorOffset_ = rhs.parseErrorOffset_;
+            parseErrorCode_ = rhs.parseErrorCode_;
+
+            if (rhs.nameBuffer_)
+                CopyFromRaw(rhs); // Normally parsed tokens.
+            else {
+                tokens_ = rhs.tokens_; // User supplied const tokens.
+                nameBuffer_ = 0;
+            }
+        }
+        return *this;
+    }
+
+    //@}
+
+    //!@name Append token
+    //@{
+
+    //! Append a token and return a new Pointer
+    /*!
+        \param token Token to be appended.
+        \param allocator Allocator for the newly return Pointer.
+        \return A new Pointer with appended token.
+    */
+    GenericPointer Append(const Token& token, Allocator* allocator = 0) const {
+        GenericPointer r;
+        r.allocator_ = allocator;
+        Ch *p = r.CopyFromRaw(*this, 1, token.length + 1);
+        std::memcpy(p, token.name, (token.length + 1) * sizeof(Ch));
+        r.tokens_[tokenCount_].name = p;
+        r.tokens_[tokenCount_].length = token.length;
+        r.tokens_[tokenCount_].index = token.index;
+        return r;
+    }
+
+    //! Append a name token with length, and return a new Pointer
+    /*!
+        \param name Name to be appended.
+        \param length Length of name.
+        \param allocator Allocator for the newly return Pointer.
+        \return A new Pointer with appended token.
+    */
+    GenericPointer Append(const Ch* name, SizeType length, Allocator* allocator = 0) const {
+        Token token = { name, length, kPointerInvalidIndex };
+        return Append(token, allocator);
+    }
+
+    //! Append a name token without length, and return a new Pointer
+    /*!
+        \param name Name (const Ch*) to be appended.
+        \param allocator Allocator for the newly return Pointer.
+        \return A new Pointer with appended token.
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::NotExpr<internal::IsSame<typename internal::RemoveConst<T>::Type, Ch> >), (GenericPointer))
+    Append(T* name, Allocator* allocator = 0) const {
+        return Append(name, internal::StrLen(name), allocator);
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Append a name token, and return a new Pointer
+    /*!
+        \param name Name to be appended.
+        \param allocator Allocator for the newly return Pointer.
+        \return A new Pointer with appended token.
+    */
+    GenericPointer Append(const std::basic_string<Ch>& name, Allocator* allocator = 0) const {
+        return Append(name.c_str(), static_cast<SizeType>(name.size()), allocator);
+    }
+#endif
+
+    //! Append a index token, and return a new Pointer
+    /*!
+        \param index Index to be appended.
+        \param allocator Allocator for the newly return Pointer.
+        \return A new Pointer with appended token.
+    */
+    GenericPointer Append(SizeType index, Allocator* allocator = 0) const {
+        char buffer[21];
+        char* end = sizeof(SizeType) == 4 ? internal::u32toa(index, buffer) : internal::u64toa(index, buffer);
+        SizeType length = static_cast<SizeType>(end - buffer);
+        buffer[length] = '\0';
+
+        if (sizeof(Ch) == 1) {
+            Token token = { reinterpret_cast<Ch*>(buffer), length, index };
+            return Append(token, allocator);
+        }
+        else {
+            Ch name[21];
+            for (size_t i = 0; i <= length; i++)
+                name[i] = static_cast<Ch>(buffer[i]);
+            Token token = { name, length, index };
+            return Append(token, allocator);
+        }
+    }
+
+    //! Append a token by value, and return a new Pointer
+    /*!
+        \param token token to be appended.
+        \param allocator Allocator for the newly return Pointer.
+        \return A new Pointer with appended token.
+    */
+    GenericPointer Append(const ValueType& token, Allocator* allocator = 0) const {
+        if (token.IsString())
+            return Append(token.GetString(), token.GetStringLength(), allocator);
+        else {
+            RAPIDJSON_ASSERT(token.IsUint64());
+            RAPIDJSON_ASSERT(token.GetUint64() <= SizeType(~0));
+            return Append(static_cast<SizeType>(token.GetUint64()), allocator);
+        }
+    }
+
+    //!@name Handling Parse Error
+    //@{
+
+    //! Check whether this is a valid pointer.
+    bool IsValid() const { return parseErrorCode_ == kPointerParseErrorNone; }
+
+    //! Get the parsing error offset in code unit.
+    size_t GetParseErrorOffset() const { return parseErrorOffset_; }
+
+    //! Get the parsing error code.
+    PointerParseErrorCode GetParseErrorCode() const { return parseErrorCode_; }
+
+    //@}
+
+    //! Get the allocator of this pointer.
+    Allocator& GetAllocator() { return *allocator_; }
+
+    //!@name Tokens
+    //@{
+
+    //! Get the token array (const version only).
+    const Token* GetTokens() const { return tokens_; }
+
+    //! Get the number of tokens.
+    size_t GetTokenCount() const { return tokenCount_; }
+
+    //@}
+
+    //!@name Equality/inequality operators
+    //@{
+
+    //! Equality operator.
+    /*!
+        \note When any pointers are invalid, always returns false.
+    */
+    bool operator==(const GenericPointer& rhs) const {
+        if (!IsValid() || !rhs.IsValid() || tokenCount_ != rhs.tokenCount_)
+            return false;
+
+        for (size_t i = 0; i < tokenCount_; i++) {
+            if (tokens_[i].index != rhs.tokens_[i].index ||
+                tokens_[i].length != rhs.tokens_[i].length || 
+                (tokens_[i].length != 0 && std::memcmp(tokens_[i].name, rhs.tokens_[i].name, sizeof(Ch)* tokens_[i].length) != 0))
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    //! Inequality operator.
+    /*!
+        \note When any pointers are invalid, always returns true.
+    */
+    bool operator!=(const GenericPointer& rhs) const { return !(*this == rhs); }
+
+    //@}
+
+    //!@name Stringify
+    //@{
+
+    //! Stringify the pointer into string representation.
+    /*!
+        \tparam OutputStream Type of output stream.
+        \param os The output stream.
+    */
+    template<typename OutputStream>
+    bool Stringify(OutputStream& os) const {
+        return Stringify<false, OutputStream>(os);
+    }
+
+    //! Stringify the pointer into URI fragment representation.
+    /*!
+        \tparam OutputStream Type of output stream.
+        \param os The output stream.
+    */
+    template<typename OutputStream>
+    bool StringifyUriFragment(OutputStream& os) const {
+        return Stringify<true, OutputStream>(os);
+    }
+
+    //@}
+
+    //!@name Create value
+    //@{
+
+    //! Create a value in a subtree.
+    /*!
+        If the value is not exist, it creates all parent values and a JSON Null value.
+        So it always succeed and return the newly created or existing value.
+
+        Remind that it may change types of parents according to tokens, so it 
+        potentially removes previously stored values. For example, if a document 
+        was an array, and "/foo" is used to create a value, then the document 
+        will be changed to an object, and all existing array elements are lost.
+
+        \param root Root value of a DOM subtree to be resolved. It can be any value other than document root.
+        \param allocator Allocator for creating the values if the specified value or its parents are not exist.
+        \param alreadyExist If non-null, it stores whether the resolved value is already exist.
+        \return The resolved newly created (a JSON Null value), or already exists value.
+    */
+    ValueType& Create(ValueType& root, typename ValueType::AllocatorType& allocator, bool* alreadyExist = 0) const {
+        RAPIDJSON_ASSERT(IsValid());
+        ValueType* v = &root;
+        bool exist = true;
+        for (const Token *t = tokens_; t != tokens_ + tokenCount_; ++t) {
+            if (v->IsArray() && t->name[0] == '-' && t->length == 1) {
+                v->PushBack(ValueType().Move(), allocator);
+                v = &((*v)[v->Size() - 1]);
+                exist = false;
+            }
+            else {
+                if (t->index == kPointerInvalidIndex) { // must be object name
+                    if (!v->IsObject())
+                        v->SetObject(); // Change to Object
+                }
+                else { // object name or array index
+                    if (!v->IsArray() && !v->IsObject())
+                        v->SetArray(); // Change to Array
+                }
+
+                if (v->IsArray()) {
+                    if (t->index >= v->Size()) {
+                        v->Reserve(t->index + 1, allocator);
+                        while (t->index >= v->Size())
+                            v->PushBack(ValueType().Move(), allocator);
+                        exist = false;
+                    }
+                    v = &((*v)[t->index]);
+                }
+                else {
+                    typename ValueType::MemberIterator m = v->FindMember(GenericStringRef<Ch>(t->name, t->length));
+                    if (m == v->MemberEnd()) {
+                        v->AddMember(ValueType(t->name, t->length, allocator).Move(), ValueType().Move(), allocator);
+                        v = &(--v->MemberEnd())->value; // Assumes AddMember() appends at the end
+                        exist = false;
+                    }
+                    else
+                        v = &m->value;
+                }
+            }
+        }
+
+        if (alreadyExist)
+            *alreadyExist = exist;
+
+        return *v;
+    }
+
+    //! Creates a value in a document.
+    /*!
+        \param document A document to be resolved.
+        \param alreadyExist If non-null, it stores whether the resolved value is already exist.
+        \return The resolved newly created, or already exists value.
+    */
+    template <typename stackAllocator>
+    ValueType& Create(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, bool* alreadyExist = 0) const {
+        return Create(document, document.GetAllocator(), alreadyExist);
+    }
+
+    //@}
+
+    //!@name Query value
+    //@{
+
+    //! Query a value in a subtree.
+    /*!
+        \param root Root value of a DOM sub-tree to be resolved. It can be any value other than document root.
+        \param unresolvedTokenIndex If the pointer cannot resolve a token in the pointer, this parameter can obtain the index of unresolved token.
+        \return Pointer to the value if it can be resolved. Otherwise null.
+
+        \note
+        There are only 3 situations when a value cannot be resolved:
+        1. A value in the path is not an array nor object.
+        2. An object value does not contain the token.
+        3. A token is out of range of an array value.
+
+        Use unresolvedTokenIndex to retrieve the token index.
+    */
+    ValueType* Get(ValueType& root, size_t* unresolvedTokenIndex = 0) const {
+        RAPIDJSON_ASSERT(IsValid());
+        ValueType* v = &root;
+        for (const Token *t = tokens_; t != tokens_ + tokenCount_; ++t) {
+            switch (v->GetType()) {
+            case kObjectType:
+                {
+                    typename ValueType::MemberIterator m = v->FindMember(GenericStringRef<Ch>(t->name, t->length));
+                    if (m == v->MemberEnd())
+                        break;
+                    v = &m->value;
+                }
+                continue;
+            case kArrayType:
+                if (t->index == kPointerInvalidIndex || t->index >= v->Size())
+                    break;
+                v = &((*v)[t->index]);
+                continue;
+            default:
+                break;
+            }
+
+            // Error: unresolved token
+            if (unresolvedTokenIndex)
+                *unresolvedTokenIndex = static_cast<size_t>(t - tokens_);
+            return 0;
+        }
+        return v;
+    }
+
+    //! Query a const value in a const subtree.
+    /*!
+        \param root Root value of a DOM sub-tree to be resolved. It can be any value other than document root.
+        \return Pointer to the value if it can be resolved. Otherwise null.
+    */
+    const ValueType* Get(const ValueType& root, size_t* unresolvedTokenIndex = 0) const { 
+        return Get(const_cast<ValueType&>(root), unresolvedTokenIndex);
+    }
+
+    //@}
+
+    //!@name Query a value with default
+    //@{
+
+    //! Query a value in a subtree with default value.
+    /*!
+        Similar to Get(), but if the specified value do not exists, it creates all parents and clone the default value.
+        So that this function always succeed.
+
+        \param root Root value of a DOM sub-tree to be resolved. It can be any value other than document root.
+        \param defaultValue Default value to be cloned if the value was not exists.
+        \param allocator Allocator for creating the values if the specified value or its parents are not exist.
+        \see Create()
+    */
+    ValueType& GetWithDefault(ValueType& root, const ValueType& defaultValue, typename ValueType::AllocatorType& allocator) const {
+        bool alreadyExist;
+        Value& v = Create(root, allocator, &alreadyExist);
+        return alreadyExist ? v : v.CopyFrom(defaultValue, allocator);
+    }
+
+    //! Query a value in a subtree with default null-terminated string.
+    ValueType& GetWithDefault(ValueType& root, const Ch* defaultValue, typename ValueType::AllocatorType& allocator) const {
+        bool alreadyExist;
+        Value& v = Create(root, allocator, &alreadyExist);
+        return alreadyExist ? v : v.SetString(defaultValue, allocator);
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Query a value in a subtree with default std::basic_string.
+    ValueType& GetWithDefault(ValueType& root, const std::basic_string<Ch>& defaultValue, typename ValueType::AllocatorType& allocator) const {
+        bool alreadyExist;
+        Value& v = Create(root, allocator, &alreadyExist);
+        return alreadyExist ? v : v.SetString(defaultValue, allocator);
+    }
+#endif
+
+    //! Query a value in a subtree with default primitive value.
+    /*!
+        \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t, \c bool
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (ValueType&))
+    GetWithDefault(ValueType& root, T defaultValue, typename ValueType::AllocatorType& allocator) const {
+        return GetWithDefault(root, ValueType(defaultValue).Move(), allocator);
+    }
+
+    //! Query a value in a document with default value.
+    template <typename stackAllocator>
+    ValueType& GetWithDefault(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, const ValueType& defaultValue) const {
+        return GetWithDefault(document, defaultValue, document.GetAllocator());
+    }
+
+    //! Query a value in a document with default null-terminated string.
+    template <typename stackAllocator>
+    ValueType& GetWithDefault(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, const Ch* defaultValue) const {
+        return GetWithDefault(document, defaultValue, document.GetAllocator());
+    }
+    
+#if RAPIDJSON_HAS_STDSTRING
+    //! Query a value in a document with default std::basic_string.
+    template <typename stackAllocator>
+    ValueType& GetWithDefault(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, const std::basic_string<Ch>& defaultValue) const {
+        return GetWithDefault(document, defaultValue, document.GetAllocator());
+    }
+#endif
+
+    //! Query a value in a document with default primitive value.
+    /*!
+        \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t, \c bool
+    */
+    template <typename T, typename stackAllocator>
+    RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (ValueType&))
+    GetWithDefault(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, T defaultValue) const {
+        return GetWithDefault(document, defaultValue, document.GetAllocator());
+    }
+
+    //@}
+
+    //!@name Set a value
+    //@{
+
+    //! Set a value in a subtree, with move semantics.
+    /*!
+        It creates all parents if they are not exist or types are different to the tokens.
+        So this function always succeeds but potentially remove existing values.
+
+        \param root Root value of a DOM sub-tree to be resolved. It can be any value other than document root.
+        \param value Value to be set.
+        \param allocator Allocator for creating the values if the specified value or its parents are not exist.
+        \see Create()
+    */
+    ValueType& Set(ValueType& root, ValueType& value, typename ValueType::AllocatorType& allocator) const {
+        return Create(root, allocator) = value;
+    }
+
+    //! Set a value in a subtree, with copy semantics.
+    ValueType& Set(ValueType& root, const ValueType& value, typename ValueType::AllocatorType& allocator) const {
+        return Create(root, allocator).CopyFrom(value, allocator);
+    }
+
+    //! Set a null-terminated string in a subtree.
+    ValueType& Set(ValueType& root, const Ch* value, typename ValueType::AllocatorType& allocator) const {
+        return Create(root, allocator) = ValueType(value, allocator).Move();
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Set a std::basic_string in a subtree.
+    ValueType& Set(ValueType& root, const std::basic_string<Ch>& value, typename ValueType::AllocatorType& allocator) const {
+        return Create(root, allocator) = ValueType(value, allocator).Move();
+    }
+#endif
+
+    //! Set a primitive value in a subtree.
+    /*!
+        \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t, \c bool
+    */
+    template <typename T>
+    RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (ValueType&))
+    Set(ValueType& root, T value, typename ValueType::AllocatorType& allocator) const {
+        return Create(root, allocator) = ValueType(value).Move();
+    }
+
+    //! Set a value in a document, with move semantics.
+    template <typename stackAllocator>
+    ValueType& Set(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, ValueType& value) const {
+        return Create(document) = value;
+    }
+
+    //! Set a value in a document, with copy semantics.
+    template <typename stackAllocator>
+    ValueType& Set(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, const ValueType& value) const {
+        return Create(document).CopyFrom(value, document.GetAllocator());
+    }
+
+    //! Set a null-terminated string in a document.
+    template <typename stackAllocator>
+    ValueType& Set(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, const Ch* value) const {
+        return Create(document) = ValueType(value, document.GetAllocator()).Move();
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    //! Sets a std::basic_string in a document.
+    template <typename stackAllocator>
+    ValueType& Set(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, const std::basic_string<Ch>& value) const {
+        return Create(document) = ValueType(value, document.GetAllocator()).Move();
+    }
+#endif
+
+    //! Set a primitive value in a document.
+    /*!
+    \tparam T Either \ref Type, \c int, \c unsigned, \c int64_t, \c uint64_t, \c bool
+    */
+    template <typename T, typename stackAllocator>
+    RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T>, internal::IsGenericValue<T> >), (ValueType&))
+        Set(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, T value) const {
+            return Create(document) = value;
+    }
+
+    //@}
+
+    //!@name Swap a value
+    //@{
+
+    //! Swap a value with a value in a subtree.
+    /*!
+        It creates all parents if they are not exist or types are different to the tokens.
+        So this function always succeeds but potentially remove existing values.
+
+        \param root Root value of a DOM sub-tree to be resolved. It can be any value other than document root.
+        \param value Value to be swapped.
+        \param allocator Allocator for creating the values if the specified value or its parents are not exist.
+        \see Create()
+    */
+    ValueType& Swap(ValueType& root, ValueType& value, typename ValueType::AllocatorType& allocator) const {
+        return Create(root, allocator).Swap(value);
+    }
+
+    //! Swap a value with a value in a document.
+    template <typename stackAllocator>
+    ValueType& Swap(GenericDocument<EncodingType, typename ValueType::AllocatorType, stackAllocator>& document, ValueType& value) const {
+        return Create(document).Swap(value);
+    }
+
+    //@}
+
+    //! Erase a value in a subtree.
+    /*!
+        \param root Root value of a DOM sub-tree to be resolved. It can be any value other than document root.
+        \return Whether the resolved value is found and erased.
+
+        \note Erasing with an empty pointer \c Pointer(""), i.e. the root, always fail and return false.
+    */
+    bool Erase(ValueType& root) const {
+        RAPIDJSON_ASSERT(IsValid());
+        if (tokenCount_ == 0) // Cannot erase the root
+            return false;
+
+        ValueType* v = &root;
+        const Token* last = tokens_ + (tokenCount_ - 1);
+        for (const Token *t = tokens_; t != last; ++t) {
+            switch (v->GetType()) {
+            case kObjectType:
+                {
+                    typename ValueType::MemberIterator m = v->FindMember(GenericStringRef<Ch>(t->name, t->length));
+                    if (m == v->MemberEnd())
+                        return false;
+                    v = &m->value;
+                }
+                break;
+            case kArrayType:
+                if (t->index == kPointerInvalidIndex || t->index >= v->Size())
+                    return false;
+                v = &((*v)[t->index]);
+                break;
+            default:
+                return false;
+            }
+        }
+
+        switch (v->GetType()) {
+        case kObjectType:
+            return v->EraseMember(GenericStringRef<Ch>(last->name, last->length));
+        case kArrayType:
+            if (last->index == kPointerInvalidIndex || last->index >= v->Size())
+                return false;
+            v->Erase(v->Begin() + last->index);
+            return true;
+        default:
+            return false;
+        }
+    }
+
+private:
+    //! Clone the content from rhs to this.
+    /*!
+        \param rhs Source pointer.
+        \param extraToken Extra tokens to be allocated.
+        \param extraNameBufferSize Extra name buffer size (in number of Ch) to be allocated.
+        \return Start of non-occupied name buffer, for storing extra names.
+    */
+    Ch* CopyFromRaw(const GenericPointer& rhs, size_t extraToken = 0, size_t extraNameBufferSize = 0) {
+        if (!allocator_) // allocator is independently owned.
+            ownAllocator_ = allocator_ = RAPIDJSON_NEW(Allocator)();
+
+        size_t nameBufferSize = rhs.tokenCount_; // null terminators for tokens
+        for (Token *t = rhs.tokens_; t != rhs.tokens_ + rhs.tokenCount_; ++t)
+            nameBufferSize += t->length;
+
+        tokenCount_ = rhs.tokenCount_ + extraToken;
+        tokens_ = static_cast<Token *>(allocator_->Malloc(tokenCount_ * sizeof(Token) + (nameBufferSize + extraNameBufferSize) * sizeof(Ch)));
+        nameBuffer_ = reinterpret_cast<Ch *>(tokens_ + tokenCount_);
+        if (rhs.tokenCount_ > 0) {
+            std::memcpy(tokens_, rhs.tokens_, rhs.tokenCount_ * sizeof(Token));
+        }
+        if (nameBufferSize > 0) {
+            std::memcpy(nameBuffer_, rhs.nameBuffer_, nameBufferSize * sizeof(Ch));
+        }
+
+        // Adjust pointers to name buffer
+        std::ptrdiff_t diff = nameBuffer_ - rhs.nameBuffer_;
+        for (Token *t = tokens_; t != tokens_ + rhs.tokenCount_; ++t)
+            t->name += diff;
+
+        return nameBuffer_ + nameBufferSize;
+    }
+
+    //! Check whether a character should be percent-encoded.
+    /*!
+        According to RFC 3986 2.3 Unreserved Characters.
+        \param c The character (code unit) to be tested.
+    */
+    bool NeedPercentEncode(Ch c) const {
+        return !((c >= '0' && c <= '9') || (c >= 'A' && c <='Z') || (c >= 'a' && c <= 'z') || c == '-' || c == '.' || c == '_' || c =='~');
+    }
+
+    //! Parse a JSON String or its URI fragment representation into tokens.
+#ifndef __clang__ // -Wdocumentation
+    /*!
+        \param source Either a JSON Pointer string, or its URI fragment representation. Not need to be null terminated.
+        \param length Length of the source string.
+        \note Source cannot be JSON String Representation of JSON Pointer, e.g. In "/\u0000", \u0000 will not be unescaped.
+    */
+#endif
+    void Parse(const Ch* source, size_t length) {
+        RAPIDJSON_ASSERT(source != NULL);
+        RAPIDJSON_ASSERT(nameBuffer_ == 0);
+        RAPIDJSON_ASSERT(tokens_ == 0);
+
+        // Create own allocator if user did not supply.
+        if (!allocator_)
+            ownAllocator_ = allocator_ = RAPIDJSON_NEW(Allocator)();
+
+        // Count number of '/' as tokenCount
+        tokenCount_ = 0;
+        for (const Ch* s = source; s != source + length; s++) 
+            if (*s == '/')
+                tokenCount_++;
+
+        Token* token = tokens_ = static_cast<Token *>(allocator_->Malloc(tokenCount_ * sizeof(Token) + length * sizeof(Ch)));
+        Ch* name = nameBuffer_ = reinterpret_cast<Ch *>(tokens_ + tokenCount_);
+        size_t i = 0;
+
+        // Detect if it is a URI fragment
+        bool uriFragment = false;
+        if (source[i] == '#') {
+            uriFragment = true;
+            i++;
+        }
+
+        if (i != length && source[i] != '/') {
+            parseErrorCode_ = kPointerParseErrorTokenMustBeginWithSolidus;
+            goto error;
+        }
+
+        while (i < length) {
+            RAPIDJSON_ASSERT(source[i] == '/');
+            i++; // consumes '/'
+
+            token->name = name;
+            bool isNumber = true;
+
+            while (i < length && source[i] != '/') {
+                Ch c = source[i];
+                if (uriFragment) {
+                    // Decoding percent-encoding for URI fragment
+                    if (c == '%') {
+                        PercentDecodeStream is(&source[i], source + length);
+                        GenericInsituStringStream<EncodingType> os(name);
+                        Ch* begin = os.PutBegin();
+                        if (!Transcoder<UTF8<>, EncodingType>().Validate(is, os) || !is.IsValid()) {
+                            parseErrorCode_ = kPointerParseErrorInvalidPercentEncoding;
+                            goto error;
+                        }
+                        size_t len = os.PutEnd(begin);
+                        i += is.Tell() - 1;
+                        if (len == 1)
+                            c = *name;
+                        else {
+                            name += len;
+                            isNumber = false;
+                            i++;
+                            continue;
+                        }
+                    }
+                    else if (NeedPercentEncode(c)) {
+                        parseErrorCode_ = kPointerParseErrorCharacterMustPercentEncode;
+                        goto error;
+                    }
+                }
+
+                i++;
+                
+                // Escaping "~0" -> '~', "~1" -> '/'
+                if (c == '~') {
+                    if (i < length) {
+                        c = source[i];
+                        if (c == '0')       c = '~';
+                        else if (c == '1')  c = '/';
+                        else {
+                            parseErrorCode_ = kPointerParseErrorInvalidEscape;
+                            goto error;
+                        }
+                        i++;
+                    }
+                    else {
+                        parseErrorCode_ = kPointerParseErrorInvalidEscape;
+                        goto error;
+                    }
+                }
+
+                // First check for index: all of characters are digit
+                if (c < '0' || c > '9')
+                    isNumber = false;
+
+                *name++ = c;
+            }
+            token->length = static_cast<SizeType>(name - token->name);
+            if (token->length == 0)
+                isNumber = false;
+            *name++ = '\0'; // Null terminator
+
+            // Second check for index: more than one digit cannot have leading zero
+            if (isNumber && token->length > 1 && token->name[0] == '0')
+                isNumber = false;
+
+            // String to SizeType conversion
+            SizeType n = 0;
+            if (isNumber) {
+                for (size_t j = 0; j < token->length; j++) {
+                    SizeType m = n * 10 + static_cast<SizeType>(token->name[j] - '0');
+                    if (m < n) {   // overflow detection
+                        isNumber = false;
+                        break;
+                    }
+                    n = m;
+                }
+            }
+
+            token->index = isNumber ? n : kPointerInvalidIndex;
+            token++;
+        }
+
+        RAPIDJSON_ASSERT(name <= nameBuffer_ + length); // Should not overflow buffer
+        parseErrorCode_ = kPointerParseErrorNone;
+        return;
+
+    error:
+        Allocator::Free(tokens_);
+        nameBuffer_ = 0;
+        tokens_ = 0;
+        tokenCount_ = 0;
+        parseErrorOffset_ = i;
+        return;
+    }
+
+    //! Stringify to string or URI fragment representation.
+    /*!
+        \tparam uriFragment True for stringifying to URI fragment representation. False for string representation.
+        \tparam OutputStream type of output stream.
+        \param os The output stream.
+    */
+    template<bool uriFragment, typename OutputStream>
+    bool Stringify(OutputStream& os) const {
+        RAPIDJSON_ASSERT(IsValid());
+
+        if (uriFragment)
+            os.Put('#');
+
+        for (Token *t = tokens_; t != tokens_ + tokenCount_; ++t) {
+            os.Put('/');
+            for (size_t j = 0; j < t->length; j++) {
+                Ch c = t->name[j];
+                if (c == '~') {
+                    os.Put('~');
+                    os.Put('0');
+                }
+                else if (c == '/') {
+                    os.Put('~');
+                    os.Put('1');
+                }
+                else if (uriFragment && NeedPercentEncode(c)) { 
+                    // Transcode to UTF8 sequence
+                    GenericStringStream<typename ValueType::EncodingType> source(&t->name[j]);
+                    PercentEncodeStream<OutputStream> target(os);
+                    if (!Transcoder<EncodingType, UTF8<> >().Validate(source, target))
+                        return false;
+                    j += source.Tell() - 1;
+                }
+                else
+                    os.Put(c);
+            }
+        }
+        return true;
+    }
+
+    //! A helper stream for decoding a percent-encoded sequence into code unit.
+    /*!
+        This stream decodes %XY triplet into code unit (0-255).
+        If it encounters invalid characters, it sets output code unit as 0 and 
+        mark invalid, and to be checked by IsValid().
+    */
+    class PercentDecodeStream {
+    public:
+        typedef typename ValueType::Ch Ch;
+
+        //! Constructor
+        /*!
+            \param source Start of the stream
+            \param end Past-the-end of the stream.
+        */
+        PercentDecodeStream(const Ch* source, const Ch* end) : src_(source), head_(source), end_(end), valid_(true) {}
+
+        Ch Take() {
+            if (*src_ != '%' || src_ + 3 > end_) { // %XY triplet
+                valid_ = false;
+                return 0;
+            }
+            src_++;
+            Ch c = 0;
+            for (int j = 0; j < 2; j++) {
+                c = static_cast<Ch>(c << 4);
+                Ch h = *src_;
+                if      (h >= '0' && h <= '9') c = static_cast<Ch>(c + h - '0');
+                else if (h >= 'A' && h <= 'F') c = static_cast<Ch>(c + h - 'A' + 10);
+                else if (h >= 'a' && h <= 'f') c = static_cast<Ch>(c + h - 'a' + 10);
+                else {
+                    valid_ = false;
+                    return 0;
+                }
+                src_++;
+            }
+            return c;
+        }
+
+        size_t Tell() const { return static_cast<size_t>(src_ - head_); }
+        bool IsValid() const { return valid_; }
+
+    private:
+        const Ch* src_;     //!< Current read position.
+        const Ch* head_;    //!< Original head of the string.
+        const Ch* end_;     //!< Past-the-end position.
+        bool valid_;        //!< Whether the parsing is valid.
+    };
+
+    //! A helper stream to encode character (UTF-8 code unit) into percent-encoded sequence.
+    template <typename OutputStream>
+    class PercentEncodeStream {
+    public:
+        PercentEncodeStream(OutputStream& os) : os_(os) {}
+        void Put(char c) { // UTF-8 must be byte
+            unsigned char u = static_cast<unsigned char>(c);
+            static const char hexDigits[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+            os_.Put('%');
+            os_.Put(static_cast<typename OutputStream::Ch>(hexDigits[u >> 4]));
+            os_.Put(static_cast<typename OutputStream::Ch>(hexDigits[u & 15]));
+        }
+    private:
+        OutputStream& os_;
+    };
+
+    Allocator* allocator_;                  //!< The current allocator. It is either user-supplied or equal to ownAllocator_.
+    Allocator* ownAllocator_;               //!< Allocator owned by this Pointer.
+    Ch* nameBuffer_;                        //!< A buffer containing all names in tokens.
+    Token* tokens_;                         //!< A list of tokens.
+    size_t tokenCount_;                     //!< Number of tokens in tokens_.
+    size_t parseErrorOffset_;               //!< Offset in code unit when parsing fail.
+    PointerParseErrorCode parseErrorCode_;  //!< Parsing error code.
+};
+
+//! GenericPointer for Value (UTF-8, default allocator).
+typedef GenericPointer<Value> Pointer;
+
+//!@name Helper functions for GenericPointer
+//@{
+
+//////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+typename T::ValueType& CreateValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, typename T::AllocatorType& a) {
+    return pointer.Create(root, a);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& CreateValueByPointer(T& root, const CharType(&source)[N], typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Create(root, a);
+}
+
+// No allocator parameter
+
+template <typename DocumentType>
+typename DocumentType::ValueType& CreateValueByPointer(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer) {
+    return pointer.Create(document);
+}
+
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& CreateValueByPointer(DocumentType& document, const CharType(&source)[N]) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).Create(document);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+typename T::ValueType* GetValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, size_t* unresolvedTokenIndex = 0) {
+    return pointer.Get(root, unresolvedTokenIndex);
+}
+
+template <typename T>
+const typename T::ValueType* GetValueByPointer(const T& root, const GenericPointer<typename T::ValueType>& pointer, size_t* unresolvedTokenIndex = 0) {
+    return pointer.Get(root, unresolvedTokenIndex);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType* GetValueByPointer(T& root, const CharType (&source)[N], size_t* unresolvedTokenIndex = 0) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Get(root, unresolvedTokenIndex);
+}
+
+template <typename T, typename CharType, size_t N>
+const typename T::ValueType* GetValueByPointer(const T& root, const CharType(&source)[N], size_t* unresolvedTokenIndex = 0) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Get(root, unresolvedTokenIndex);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+typename T::ValueType& GetValueByPointerWithDefault(T& root, const GenericPointer<typename T::ValueType>& pointer, const typename T::ValueType& defaultValue, typename T::AllocatorType& a) {
+    return pointer.GetWithDefault(root, defaultValue, a);
+}
+
+template <typename T>
+typename T::ValueType& GetValueByPointerWithDefault(T& root, const GenericPointer<typename T::ValueType>& pointer, const typename T::Ch* defaultValue, typename T::AllocatorType& a) {
+    return pointer.GetWithDefault(root, defaultValue, a);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename T>
+typename T::ValueType& GetValueByPointerWithDefault(T& root, const GenericPointer<typename T::ValueType>& pointer, const std::basic_string<typename T::Ch>& defaultValue, typename T::AllocatorType& a) {
+    return pointer.GetWithDefault(root, defaultValue, a);
+}
+#endif
+
+template <typename T, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename T::ValueType&))
+GetValueByPointerWithDefault(T& root, const GenericPointer<typename T::ValueType>& pointer, T2 defaultValue, typename T::AllocatorType& a) {
+    return pointer.GetWithDefault(root, defaultValue, a);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& GetValueByPointerWithDefault(T& root, const CharType(&source)[N], const typename T::ValueType& defaultValue, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).GetWithDefault(root, defaultValue, a);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& GetValueByPointerWithDefault(T& root, const CharType(&source)[N], const typename T::Ch* defaultValue, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).GetWithDefault(root, defaultValue, a);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& GetValueByPointerWithDefault(T& root, const CharType(&source)[N], const std::basic_string<typename T::Ch>& defaultValue, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).GetWithDefault(root, defaultValue, a);
+}
+#endif
+
+template <typename T, typename CharType, size_t N, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename T::ValueType&))
+GetValueByPointerWithDefault(T& root, const CharType(&source)[N], T2 defaultValue, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).GetWithDefault(root, defaultValue, a);
+}
+
+// No allocator parameter
+
+template <typename DocumentType>
+typename DocumentType::ValueType& GetValueByPointerWithDefault(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, const typename DocumentType::ValueType& defaultValue) {
+    return pointer.GetWithDefault(document, defaultValue);
+}
+
+template <typename DocumentType>
+typename DocumentType::ValueType& GetValueByPointerWithDefault(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, const typename DocumentType::Ch* defaultValue) {
+    return pointer.GetWithDefault(document, defaultValue);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename DocumentType>
+typename DocumentType::ValueType& GetValueByPointerWithDefault(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, const std::basic_string<typename DocumentType::Ch>& defaultValue) {
+    return pointer.GetWithDefault(document, defaultValue);
+}
+#endif
+
+template <typename DocumentType, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename DocumentType::ValueType&))
+GetValueByPointerWithDefault(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, T2 defaultValue) {
+    return pointer.GetWithDefault(document, defaultValue);
+}
+
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& GetValueByPointerWithDefault(DocumentType& document, const CharType(&source)[N], const typename DocumentType::ValueType& defaultValue) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).GetWithDefault(document, defaultValue);
+}
+
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& GetValueByPointerWithDefault(DocumentType& document, const CharType(&source)[N], const typename DocumentType::Ch* defaultValue) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).GetWithDefault(document, defaultValue);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& GetValueByPointerWithDefault(DocumentType& document, const CharType(&source)[N], const std::basic_string<typename DocumentType::Ch>& defaultValue) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).GetWithDefault(document, defaultValue);
+}
+#endif
+
+template <typename DocumentType, typename CharType, size_t N, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename DocumentType::ValueType&))
+GetValueByPointerWithDefault(DocumentType& document, const CharType(&source)[N], T2 defaultValue) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).GetWithDefault(document, defaultValue);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+typename T::ValueType& SetValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, typename T::ValueType& value, typename T::AllocatorType& a) {
+    return pointer.Set(root, value, a);
+}
+
+template <typename T>
+typename T::ValueType& SetValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, const typename T::ValueType& value, typename T::AllocatorType& a) {
+    return pointer.Set(root, value, a);
+}
+
+template <typename T>
+typename T::ValueType& SetValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, const typename T::Ch* value, typename T::AllocatorType& a) {
+    return pointer.Set(root, value, a);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename T>
+typename T::ValueType& SetValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, const std::basic_string<typename T::Ch>& value, typename T::AllocatorType& a) {
+    return pointer.Set(root, value, a);
+}
+#endif
+
+template <typename T, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename T::ValueType&))
+SetValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, T2 value, typename T::AllocatorType& a) {
+    return pointer.Set(root, value, a);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& SetValueByPointer(T& root, const CharType(&source)[N], typename T::ValueType& value, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Set(root, value, a);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& SetValueByPointer(T& root, const CharType(&source)[N], const typename T::ValueType& value, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Set(root, value, a);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& SetValueByPointer(T& root, const CharType(&source)[N], const typename T::Ch* value, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Set(root, value, a);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& SetValueByPointer(T& root, const CharType(&source)[N], const std::basic_string<typename T::Ch>& value, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Set(root, value, a);
+}
+#endif
+
+template <typename T, typename CharType, size_t N, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename T::ValueType&))
+SetValueByPointer(T& root, const CharType(&source)[N], T2 value, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Set(root, value, a);
+}
+
+// No allocator parameter
+
+template <typename DocumentType>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, typename DocumentType::ValueType& value) {
+    return pointer.Set(document, value);
+}
+
+template <typename DocumentType>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, const typename DocumentType::ValueType& value) {
+    return pointer.Set(document, value);
+}
+
+template <typename DocumentType>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, const typename DocumentType::Ch* value) {
+    return pointer.Set(document, value);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename DocumentType>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, const std::basic_string<typename DocumentType::Ch>& value) {
+    return pointer.Set(document, value);
+}
+#endif
+
+template <typename DocumentType, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename DocumentType::ValueType&))
+SetValueByPointer(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, T2 value) {
+    return pointer.Set(document, value);
+}
+
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const CharType(&source)[N], typename DocumentType::ValueType& value) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).Set(document, value);
+}
+
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const CharType(&source)[N], const typename DocumentType::ValueType& value) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).Set(document, value);
+}
+
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const CharType(&source)[N], const typename DocumentType::Ch* value) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).Set(document, value);
+}
+
+#if RAPIDJSON_HAS_STDSTRING
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& SetValueByPointer(DocumentType& document, const CharType(&source)[N], const std::basic_string<typename DocumentType::Ch>& value) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).Set(document, value);
+}
+#endif
+
+template <typename DocumentType, typename CharType, size_t N, typename T2>
+RAPIDJSON_DISABLEIF_RETURN((internal::OrExpr<internal::IsPointer<T2>, internal::IsGenericValue<T2> >), (typename DocumentType::ValueType&))
+SetValueByPointer(DocumentType& document, const CharType(&source)[N], T2 value) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).Set(document, value);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+typename T::ValueType& SwapValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer, typename T::ValueType& value, typename T::AllocatorType& a) {
+    return pointer.Swap(root, value, a);
+}
+
+template <typename T, typename CharType, size_t N>
+typename T::ValueType& SwapValueByPointer(T& root, const CharType(&source)[N], typename T::ValueType& value, typename T::AllocatorType& a) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Swap(root, value, a);
+}
+
+template <typename DocumentType>
+typename DocumentType::ValueType& SwapValueByPointer(DocumentType& document, const GenericPointer<typename DocumentType::ValueType>& pointer, typename DocumentType::ValueType& value) {
+    return pointer.Swap(document, value);
+}
+
+template <typename DocumentType, typename CharType, size_t N>
+typename DocumentType::ValueType& SwapValueByPointer(DocumentType& document, const CharType(&source)[N], typename DocumentType::ValueType& value) {
+    return GenericPointer<typename DocumentType::ValueType>(source, N - 1).Swap(document, value);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+template <typename T>
+bool EraseValueByPointer(T& root, const GenericPointer<typename T::ValueType>& pointer) {
+    return pointer.Erase(root);
+}
+
+template <typename T, typename CharType, size_t N>
+bool EraseValueByPointer(T& root, const CharType(&source)[N]) {
+    return GenericPointer<typename T::ValueType>(source, N - 1).Erase(root);
+}
+
+//@}
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_POINTER_H_
diff --git a/external/rapidjson/prettywriter.h b/external/rapidjson/prettywriter.h
new file mode 100644
index 0000000..98dfb30
--- /dev/null
+++ b/external/rapidjson/prettywriter.h
@@ -0,0 +1,277 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_PRETTYWRITER_H_
+#define RAPIDJSON_PRETTYWRITER_H_
+
+#include "writer.h"
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(c++98-compat)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Combination of PrettyWriter format flags.
+/*! \see PrettyWriter::SetFormatOptions
+ */
+enum PrettyFormatOptions {
+    kFormatDefault = 0,         //!< Default pretty formatting.
+    kFormatSingleLineArray = 1  //!< Format arrays on a single line.
+};
+
+//! Writer with indentation and spacing.
+/*!
+    \tparam OutputStream Type of ouptut os.
+    \tparam SourceEncoding Encoding of source string.
+    \tparam TargetEncoding Encoding of output stream.
+    \tparam StackAllocator Type of allocator for allocating memory of stack.
+*/
+template<typename OutputStream, typename SourceEncoding = UTF8<>, typename TargetEncoding = UTF8<>, typename StackAllocator = CrtAllocator, unsigned writeFlags = kWriteDefaultFlags>
+class PrettyWriter : public Writer<OutputStream, SourceEncoding, TargetEncoding, StackAllocator, writeFlags> {
+public:
+    typedef Writer<OutputStream, SourceEncoding, TargetEncoding, StackAllocator, writeFlags> Base;
+    typedef typename Base::Ch Ch;
+
+    //! Constructor
+    /*! \param os Output stream.
+        \param allocator User supplied allocator. If it is null, it will create a private one.
+        \param levelDepth Initial capacity of stack.
+    */
+    explicit PrettyWriter(OutputStream& os, StackAllocator* allocator = 0, size_t levelDepth = Base::kDefaultLevelDepth) : 
+        Base(os, allocator, levelDepth), indentChar_(' '), indentCharCount_(4), formatOptions_(kFormatDefault) {}
+
+
+    explicit PrettyWriter(StackAllocator* allocator = 0, size_t levelDepth = Base::kDefaultLevelDepth) : 
+        Base(allocator, levelDepth), indentChar_(' '), indentCharCount_(4) {}
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    PrettyWriter(PrettyWriter&& rhs) :
+        Base(std::forward<PrettyWriter>(rhs)), indentChar_(rhs.indentChar_), indentCharCount_(rhs.indentCharCount_), formatOptions_(rhs.formatOptions_) {}
+#endif
+
+    //! Set custom indentation.
+    /*! \param indentChar       Character for indentation. Must be whitespace character (' ', '\\t', '\\n', '\\r').
+        \param indentCharCount  Number of indent characters for each indentation level.
+        \note The default indentation is 4 spaces.
+    */
+    PrettyWriter& SetIndent(Ch indentChar, unsigned indentCharCount) {
+        RAPIDJSON_ASSERT(indentChar == ' ' || indentChar == '\t' || indentChar == '\n' || indentChar == '\r');
+        indentChar_ = indentChar;
+        indentCharCount_ = indentCharCount;
+        return *this;
+    }
+
+    //! Set pretty writer formatting options.
+    /*! \param options Formatting options.
+    */
+    PrettyWriter& SetFormatOptions(PrettyFormatOptions options) {
+        formatOptions_ = options;
+        return *this;
+    }
+
+    /*! @name Implementation of Handler
+        \see Handler
+    */
+    //@{
+
+    bool Null()                 { PrettyPrefix(kNullType);   return Base::WriteNull(); }
+    bool Bool(bool b)           { PrettyPrefix(b ? kTrueType : kFalseType); return Base::WriteBool(b); }
+    bool Int(int i)             { PrettyPrefix(kNumberType); return Base::WriteInt(i); }
+    bool Uint(unsigned u)       { PrettyPrefix(kNumberType); return Base::WriteUint(u); }
+    bool Int64(int64_t i64)     { PrettyPrefix(kNumberType); return Base::WriteInt64(i64); }
+    bool Uint64(uint64_t u64)   { PrettyPrefix(kNumberType); return Base::WriteUint64(u64);  }
+    bool Double(double d)       { PrettyPrefix(kNumberType); return Base::WriteDouble(d); }
+
+    bool RawNumber(const Ch* str, SizeType length, bool copy = false) {
+        RAPIDJSON_ASSERT(str != 0);
+        (void)copy;
+        PrettyPrefix(kNumberType);
+        return Base::WriteString(str, length);
+    }
+
+    bool String(const Ch* str, SizeType length, bool copy = false) {
+        RAPIDJSON_ASSERT(str != 0);
+        (void)copy;
+        PrettyPrefix(kStringType);
+        return Base::WriteString(str, length);
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    bool String(const std::basic_string<Ch>& str) {
+        return String(str.data(), SizeType(str.size()));
+    }
+#endif
+
+    bool StartObject() {
+        PrettyPrefix(kObjectType);
+        new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(false);
+        return Base::WriteStartObject();
+    }
+
+    bool Key(const Ch* str, SizeType length, bool copy = false) { return String(str, length, copy); }
+
+#if RAPIDJSON_HAS_STDSTRING
+    bool Key(const std::basic_string<Ch>& str) {
+        return Key(str.data(), SizeType(str.size()));
+    }
+#endif
+	
+    bool EndObject(SizeType memberCount = 0) {
+        (void)memberCount;
+        RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level)); // not inside an Object
+        RAPIDJSON_ASSERT(!Base::level_stack_.template Top<typename Base::Level>()->inArray); // currently inside an Array, not Object
+        RAPIDJSON_ASSERT(0 == Base::level_stack_.template Top<typename Base::Level>()->valueCount % 2); // Object has a Key without a Value
+       
+        bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
+
+        if (!empty) {
+            Base::os_->Put('\n');
+            WriteIndent();
+        }
+        bool ret = Base::WriteEndObject();
+        (void)ret;
+        RAPIDJSON_ASSERT(ret == true);
+        if (Base::level_stack_.Empty()) // end of json text
+            Base::Flush();
+        return true;
+    }
+
+    bool StartArray() {
+        PrettyPrefix(kArrayType);
+        new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(true);
+        return Base::WriteStartArray();
+    }
+
+    bool EndArray(SizeType memberCount = 0) {
+        (void)memberCount;
+        RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level));
+        RAPIDJSON_ASSERT(Base::level_stack_.template Top<typename Base::Level>()->inArray);
+        bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
+
+        if (!empty && !(formatOptions_ & kFormatSingleLineArray)) {
+            Base::os_->Put('\n');
+            WriteIndent();
+        }
+        bool ret = Base::WriteEndArray();
+        (void)ret;
+        RAPIDJSON_ASSERT(ret == true);
+        if (Base::level_stack_.Empty()) // end of json text
+            Base::Flush();
+        return true;
+    }
+
+    //@}
+
+    /*! @name Convenience extensions */
+    //@{
+
+    //! Simpler but slower overload.
+    bool String(const Ch* str) { return String(str, internal::StrLen(str)); }
+    bool Key(const Ch* str) { return Key(str, internal::StrLen(str)); }
+
+    //@}
+
+    //! Write a raw JSON value.
+    /*!
+        For user to write a stringified JSON as a value.
+
+        \param json A well-formed JSON value. It should not contain null character within [0, length - 1] range.
+        \param length Length of the json.
+        \param type Type of the root of json.
+        \note When using PrettyWriter::RawValue(), the result json may not be indented correctly.
+    */
+    bool RawValue(const Ch* json, size_t length, Type type) {
+        RAPIDJSON_ASSERT(json != 0);
+        PrettyPrefix(type);
+        return Base::WriteRawValue(json, length);
+    }
+
+protected:
+    void PrettyPrefix(Type type) {
+        (void)type;
+        if (Base::level_stack_.GetSize() != 0) { // this value is not at root
+            typename Base::Level* level = Base::level_stack_.template Top<typename Base::Level>();
+
+            if (level->inArray) {
+                if (level->valueCount > 0) {
+                    Base::os_->Put(','); // add comma if it is not the first element in array
+                    if (formatOptions_ & kFormatSingleLineArray)
+                        Base::os_->Put(' ');
+                }
+
+                if (!(formatOptions_ & kFormatSingleLineArray)) {
+                    Base::os_->Put('\n');
+                    WriteIndent();
+                }
+            }
+            else {  // in object
+                if (level->valueCount > 0) {
+                    if (level->valueCount % 2 == 0) {
+                        Base::os_->Put(',');
+                        Base::os_->Put('\n');
+                    }
+                    else {
+                        Base::os_->Put(':');
+                        Base::os_->Put(' ');
+                    }
+                }
+                else
+                    Base::os_->Put('\n');
+
+                if (level->valueCount % 2 == 0)
+                    WriteIndent();
+            }
+            if (!level->inArray && level->valueCount % 2 == 0)
+                RAPIDJSON_ASSERT(type == kStringType);  // if it's in object, then even number should be a name
+            level->valueCount++;
+        }
+        else {
+            RAPIDJSON_ASSERT(!Base::hasRoot_);  // Should only has one and only one root.
+            Base::hasRoot_ = true;
+        }
+    }
+
+    void WriteIndent()  {
+        size_t count = (Base::level_stack_.GetSize() / sizeof(typename Base::Level)) * indentCharCount_;
+        PutN(*Base::os_, static_cast<typename OutputStream::Ch>(indentChar_), count);
+    }
+
+    Ch indentChar_;
+    unsigned indentCharCount_;
+    PrettyFormatOptions formatOptions_;
+
+private:
+    // Prohibit copy constructor & assignment operator.
+    PrettyWriter(const PrettyWriter&);
+    PrettyWriter& operator=(const PrettyWriter&);
+};
+
+RAPIDJSON_NAMESPACE_END
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_RAPIDJSON_H_
diff --git a/external/rapidjson/rapidjson.h b/external/rapidjson/rapidjson.h
new file mode 100644
index 0000000..5716fdc
--- /dev/null
+++ b/external/rapidjson/rapidjson.h
@@ -0,0 +1,628 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_RAPIDJSON_H_
+#define RAPIDJSON_RAPIDJSON_H_
+
+/*!\file rapidjson.h
+    \brief common definitions and configuration
+    
+    \see RAPIDJSON_CONFIG
+ */
+
+/*! \defgroup RAPIDJSON_CONFIG RapidJSON configuration
+    \brief Configuration macros for library features
+
+    Some RapidJSON features are configurable to adapt the library to a wide
+    variety of platforms, environments and usage scenarios.  Most of the
+    features can be configured in terms of overriden or predefined
+    preprocessor macros at compile-time.
+
+    Some additional customization is available in the \ref RAPIDJSON_ERRORS APIs.
+
+    \note These macros should be given on the compiler command-line
+          (where applicable)  to avoid inconsistent values when compiling
+          different translation units of a single application.
+ */
+
+#include <cstdlib>  // malloc(), realloc(), free(), size_t
+#include <cstring>  // memset(), memcpy(), memmove(), memcmp()
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_VERSION_STRING
+//
+// ALWAYS synchronize the following 3 macros with corresponding variables in /CMakeLists.txt.
+//
+
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+// token stringification
+#define RAPIDJSON_STRINGIFY(x) RAPIDJSON_DO_STRINGIFY(x)
+#define RAPIDJSON_DO_STRINGIFY(x) #x
+
+// token concatenation
+#define RAPIDJSON_JOIN(X, Y) RAPIDJSON_DO_JOIN(X, Y)
+#define RAPIDJSON_DO_JOIN(X, Y) RAPIDJSON_DO_JOIN2(X, Y)
+#define RAPIDJSON_DO_JOIN2(X, Y) X##Y
+//!@endcond
+
+/*! \def RAPIDJSON_MAJOR_VERSION
+    \ingroup RAPIDJSON_CONFIG
+    \brief Major version of RapidJSON in integer.
+*/
+/*! \def RAPIDJSON_MINOR_VERSION
+    \ingroup RAPIDJSON_CONFIG
+    \brief Minor version of RapidJSON in integer.
+*/
+/*! \def RAPIDJSON_PATCH_VERSION
+    \ingroup RAPIDJSON_CONFIG
+    \brief Patch version of RapidJSON in integer.
+*/
+/*! \def RAPIDJSON_VERSION_STRING
+    \ingroup RAPIDJSON_CONFIG
+    \brief Version of RapidJSON in "<major>.<minor>.<patch>" string format.
+*/
+#define RAPIDJSON_MAJOR_VERSION 1
+#define RAPIDJSON_MINOR_VERSION 1
+#define RAPIDJSON_PATCH_VERSION 0
+#define RAPIDJSON_VERSION_STRING \
+    RAPIDJSON_STRINGIFY(RAPIDJSON_MAJOR_VERSION.RAPIDJSON_MINOR_VERSION.RAPIDJSON_PATCH_VERSION)
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_NAMESPACE_(BEGIN|END)
+/*! \def RAPIDJSON_NAMESPACE
+    \ingroup RAPIDJSON_CONFIG
+    \brief   provide custom rapidjson namespace
+
+    In order to avoid symbol clashes and/or "One Definition Rule" errors
+    between multiple inclusions of (different versions of) RapidJSON in
+    a single binary, users can customize the name of the main RapidJSON
+    namespace.
+
+    In case of a single nesting level, defining \c RAPIDJSON_NAMESPACE
+    to a custom name (e.g. \c MyRapidJSON) is sufficient.  If multiple
+    levels are needed, both \ref RAPIDJSON_NAMESPACE_BEGIN and \ref
+    RAPIDJSON_NAMESPACE_END need to be defined as well:
+
+    \code
+    // in some .cpp file
+    #define RAPIDJSON_NAMESPACE my::rapidjson
+    #define RAPIDJSON_NAMESPACE_BEGIN namespace my { namespace rapidjson {
+    #define RAPIDJSON_NAMESPACE_END   } }
+    #include "rapidjson/..."
+    \endcode
+
+    \see rapidjson
+ */
+/*! \def RAPIDJSON_NAMESPACE_BEGIN
+    \ingroup RAPIDJSON_CONFIG
+    \brief   provide custom rapidjson namespace (opening expression)
+    \see RAPIDJSON_NAMESPACE
+*/
+/*! \def RAPIDJSON_NAMESPACE_END
+    \ingroup RAPIDJSON_CONFIG
+    \brief   provide custom rapidjson namespace (closing expression)
+    \see RAPIDJSON_NAMESPACE
+*/
+#ifndef RAPIDJSON_NAMESPACE
+#define RAPIDJSON_NAMESPACE rapidjson
+#endif
+#ifndef RAPIDJSON_NAMESPACE_BEGIN
+#define RAPIDJSON_NAMESPACE_BEGIN namespace RAPIDJSON_NAMESPACE {
+#endif
+#ifndef RAPIDJSON_NAMESPACE_END
+#define RAPIDJSON_NAMESPACE_END }
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_HAS_STDSTRING
+
+#ifndef RAPIDJSON_HAS_STDSTRING
+#ifdef RAPIDJSON_DOXYGEN_RUNNING
+#define RAPIDJSON_HAS_STDSTRING 1 // force generation of documentation
+#else
+#define RAPIDJSON_HAS_STDSTRING 0 // no std::string support by default
+#endif
+/*! \def RAPIDJSON_HAS_STDSTRING
+    \ingroup RAPIDJSON_CONFIG
+    \brief Enable RapidJSON support for \c std::string
+
+    By defining this preprocessor symbol to \c 1, several convenience functions for using
+    \ref rapidjson::GenericValue with \c std::string are enabled, especially
+    for construction and comparison.
+
+    \hideinitializer
+*/
+#endif // !defined(RAPIDJSON_HAS_STDSTRING)
+
+#if RAPIDJSON_HAS_STDSTRING
+#include <string>
+#endif // RAPIDJSON_HAS_STDSTRING
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_NO_INT64DEFINE
+
+/*! \def RAPIDJSON_NO_INT64DEFINE
+    \ingroup RAPIDJSON_CONFIG
+    \brief Use external 64-bit integer types.
+
+    RapidJSON requires the 64-bit integer types \c int64_t and  \c uint64_t types
+    to be available at global scope.
+
+    If users have their own definition, define RAPIDJSON_NO_INT64DEFINE to
+    prevent RapidJSON from defining its own types.
+*/
+#ifndef RAPIDJSON_NO_INT64DEFINE
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+#if defined(_MSC_VER) && (_MSC_VER < 1800)	// Visual Studio 2013
+#include "msinttypes/stdint.h"
+#include "msinttypes/inttypes.h"
+#else
+// Other compilers should have this.
+#include <stdint.h>
+#include <inttypes.h>
+#endif
+//!@endcond
+#ifdef RAPIDJSON_DOXYGEN_RUNNING
+#define RAPIDJSON_NO_INT64DEFINE
+#endif
+#endif // RAPIDJSON_NO_INT64TYPEDEF
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_FORCEINLINE
+
+#ifndef RAPIDJSON_FORCEINLINE
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+#if defined(_MSC_VER) && defined(NDEBUG)
+#define RAPIDJSON_FORCEINLINE __forceinline
+#elif defined(__GNUC__) && __GNUC__ >= 4 && defined(NDEBUG)
+#define RAPIDJSON_FORCEINLINE __attribute__((always_inline))
+#else
+#define RAPIDJSON_FORCEINLINE
+#endif
+//!@endcond
+#endif // RAPIDJSON_FORCEINLINE
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_ENDIAN
+#define RAPIDJSON_LITTLEENDIAN  0   //!< Little endian machine
+#define RAPIDJSON_BIGENDIAN     1   //!< Big endian machine
+
+//! Endianness of the machine.
+/*!
+    \def RAPIDJSON_ENDIAN
+    \ingroup RAPIDJSON_CONFIG
+
+    GCC 4.6 provided macro for detecting endianness of the target machine. But other
+    compilers may not have this. User can define RAPIDJSON_ENDIAN to either
+    \ref RAPIDJSON_LITTLEENDIAN or \ref RAPIDJSON_BIGENDIAN.
+
+    Default detection implemented with reference to
+    \li https://gcc.gnu.org/onlinedocs/gcc-4.6.0/cpp/Common-Predefined-Macros.html
+    \li http://www.boost.org/doc/libs/1_42_0/boost/detail/endian.hpp
+*/
+#ifndef RAPIDJSON_ENDIAN
+// Detect with GCC 4.6's macro
+#  ifdef __BYTE_ORDER__
+#    if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#      define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
+#    elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#      define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
+#    else
+#      error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN.
+#    endif // __BYTE_ORDER__
+// Detect with GLIBC's endian.h
+#  elif defined(__GLIBC__)
+#    include <endian.h>
+#    if (__BYTE_ORDER == __LITTLE_ENDIAN)
+#      define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
+#    elif (__BYTE_ORDER == __BIG_ENDIAN)
+#      define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
+#    else
+#      error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN.
+#   endif // __GLIBC__
+// Detect with _LITTLE_ENDIAN and _BIG_ENDIAN macro
+#  elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
+#    define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
+#  elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
+#    define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
+// Detect with architecture macros
+#  elif defined(__sparc) || defined(__sparc__) || defined(_POWER) || defined(__powerpc__) || defined(__ppc__) || defined(__hpux) || defined(__hppa) || defined(_MIPSEB) || defined(_POWER) || defined(__s390__)
+#    define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
+#  elif defined(__i386__) || defined(__alpha__) || defined(__ia64) || defined(__ia64__) || defined(_M_IX86) || defined(_M_IA64) || defined(_M_ALPHA) || defined(__amd64) || defined(__amd64__) || defined(_M_AMD64) || defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || defined(__bfin__)
+#    define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
+#  elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
+#    define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
+#  elif defined(RAPIDJSON_DOXYGEN_RUNNING)
+#    define RAPIDJSON_ENDIAN
+#  else
+#    error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN.   
+#  endif
+#endif // RAPIDJSON_ENDIAN
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_64BIT
+
+//! Whether using 64-bit architecture
+#ifndef RAPIDJSON_64BIT
+#if defined(__LP64__) || (defined(__x86_64__) && defined(__ILP32__)) || defined(_WIN64) || defined(__EMSCRIPTEN__)
+#define RAPIDJSON_64BIT 1
+#else
+#define RAPIDJSON_64BIT 0
+#endif
+#endif // RAPIDJSON_64BIT
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_ALIGN
+
+//! Data alignment of the machine.
+/*! \ingroup RAPIDJSON_CONFIG
+    \param x pointer to align
+
+    Some machines require strict data alignment. Currently the default uses 4 bytes
+    alignment on 32-bit platforms and 8 bytes alignment for 64-bit platforms.
+    User can customize by defining the RAPIDJSON_ALIGN function macro.
+*/
+#ifndef RAPIDJSON_ALIGN
+#if RAPIDJSON_64BIT == 1
+#define RAPIDJSON_ALIGN(x) (((x) + static_cast<uint64_t>(7u)) & ~static_cast<uint64_t>(7u))
+#else
+#define RAPIDJSON_ALIGN(x) (((x) + 3u) & ~3u)
+#endif
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_UINT64_C2
+
+//! Construct a 64-bit literal by a pair of 32-bit integer.
+/*!
+    64-bit literal with or without ULL suffix is prone to compiler warnings.
+    UINT64_C() is C macro which cause compilation problems.
+    Use this macro to define 64-bit constants by a pair of 32-bit integer.
+*/
+#ifndef RAPIDJSON_UINT64_C2
+#define RAPIDJSON_UINT64_C2(high32, low32) ((static_cast<uint64_t>(high32) << 32) | static_cast<uint64_t>(low32))
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_48BITPOINTER_OPTIMIZATION
+
+//! Use only lower 48-bit address for some pointers.
+/*!
+    \ingroup RAPIDJSON_CONFIG
+
+    This optimization uses the fact that current X86-64 architecture only implement lower 48-bit virtual address.
+    The higher 16-bit can be used for storing other data.
+    \c GenericValue uses this optimization to reduce its size form 24 bytes to 16 bytes in 64-bit architecture.
+*/
+#ifndef RAPIDJSON_48BITPOINTER_OPTIMIZATION
+#if defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__x86_64) || defined(_M_X64) || defined(_M_AMD64)
+#define RAPIDJSON_48BITPOINTER_OPTIMIZATION 1
+#else
+#define RAPIDJSON_48BITPOINTER_OPTIMIZATION 0
+#endif
+#endif // RAPIDJSON_48BITPOINTER_OPTIMIZATION
+
+#if RAPIDJSON_48BITPOINTER_OPTIMIZATION == 1
+#if RAPIDJSON_64BIT != 1
+#error RAPIDJSON_48BITPOINTER_OPTIMIZATION can only be set to 1 when RAPIDJSON_64BIT=1
+#endif
+#define RAPIDJSON_SETPOINTER(type, p, x) (p = reinterpret_cast<type *>((reinterpret_cast<uintptr_t>(p) & static_cast<uintptr_t>(RAPIDJSON_UINT64_C2(0xFFFF0000, 0x00000000))) | reinterpret_cast<uintptr_t>(reinterpret_cast<const void*>(x))))
+#define RAPIDJSON_GETPOINTER(type, p) (reinterpret_cast<type *>(reinterpret_cast<uintptr_t>(p) & static_cast<uintptr_t>(RAPIDJSON_UINT64_C2(0x0000FFFF, 0xFFFFFFFF))))
+#else
+#define RAPIDJSON_SETPOINTER(type, p, x) (p = (x))
+#define RAPIDJSON_GETPOINTER(type, p) (p)
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_SSE2/RAPIDJSON_SSE42/RAPIDJSON_NEON/RAPIDJSON_SIMD
+
+/*! \def RAPIDJSON_SIMD
+    \ingroup RAPIDJSON_CONFIG
+    \brief Enable SSE2/SSE4.2/Neon optimization.
+
+    RapidJSON supports optimized implementations for some parsing operations
+    based on the SSE2, SSE4.2 or NEon SIMD extensions on modern Intel
+    or ARM compatible processors.
+
+    To enable these optimizations, three different symbols can be defined;
+    \code
+    // Enable SSE2 optimization.
+    #define RAPIDJSON_SSE2
+
+    // Enable SSE4.2 optimization.
+    #define RAPIDJSON_SSE42
+    \endcode
+
+    // Enable ARM Neon optimization.
+    #define RAPIDJSON_NEON
+    \endcode
+
+    \c RAPIDJSON_SSE42 takes precedence over SSE2, if both are defined.
+
+    If any of these symbols is defined, RapidJSON defines the macro
+    \c RAPIDJSON_SIMD to indicate the availability of the optimized code.
+*/
+#if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42) \
+    || defined(RAPIDJSON_NEON) || defined(RAPIDJSON_DOXYGEN_RUNNING)
+#define RAPIDJSON_SIMD
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_NO_SIZETYPEDEFINE
+
+#ifndef RAPIDJSON_NO_SIZETYPEDEFINE
+/*! \def RAPIDJSON_NO_SIZETYPEDEFINE
+    \ingroup RAPIDJSON_CONFIG
+    \brief User-provided \c SizeType definition.
+
+    In order to avoid using 32-bit size types for indexing strings and arrays,
+    define this preprocessor symbol and provide the type rapidjson::SizeType
+    before including RapidJSON:
+    \code
+    #define RAPIDJSON_NO_SIZETYPEDEFINE
+    namespace rapidjson { typedef ::std::size_t SizeType; }
+    #include "rapidjson/..."
+    \endcode
+
+    \see rapidjson::SizeType
+*/
+#ifdef RAPIDJSON_DOXYGEN_RUNNING
+#define RAPIDJSON_NO_SIZETYPEDEFINE
+#endif
+RAPIDJSON_NAMESPACE_BEGIN
+//! Size type (for string lengths, array sizes, etc.)
+/*! RapidJSON uses 32-bit array/string indices even on 64-bit platforms,
+    instead of using \c size_t. Users may override the SizeType by defining
+    \ref RAPIDJSON_NO_SIZETYPEDEFINE.
+*/
+typedef unsigned SizeType;
+RAPIDJSON_NAMESPACE_END
+#endif
+
+// always import std::size_t to rapidjson namespace
+RAPIDJSON_NAMESPACE_BEGIN
+using std::size_t;
+RAPIDJSON_NAMESPACE_END
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_ASSERT
+
+//! Assertion.
+/*! \ingroup RAPIDJSON_CONFIG
+    By default, rapidjson uses C \c assert() for internal assertions.
+    User can override it by defining RAPIDJSON_ASSERT(x) macro.
+
+    \note Parsing errors are handled and can be customized by the
+          \ref RAPIDJSON_ERRORS APIs.
+*/
+#ifndef RAPIDJSON_ASSERT
+#include <cassert>
+#define RAPIDJSON_ASSERT(x) assert(x)
+#endif // RAPIDJSON_ASSERT
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_STATIC_ASSERT
+
+// Prefer C++11 static_assert, if available
+#ifndef RAPIDJSON_STATIC_ASSERT
+#if __cplusplus >= 201103L || ( defined(_MSC_VER) && _MSC_VER >= 1800 )
+#define RAPIDJSON_STATIC_ASSERT(x) \
+   static_assert(x, RAPIDJSON_STRINGIFY(x))
+#endif // C++11
+#endif // RAPIDJSON_STATIC_ASSERT
+
+// Adopt C++03 implementation from boost
+#ifndef RAPIDJSON_STATIC_ASSERT
+#ifndef __clang__
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+#endif
+RAPIDJSON_NAMESPACE_BEGIN
+template <bool x> struct STATIC_ASSERTION_FAILURE;
+template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; };
+template <size_t x> struct StaticAssertTest {};
+RAPIDJSON_NAMESPACE_END
+
+#if defined(__GNUC__)
+#define RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE __attribute__((unused))
+#else
+#define RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE 
+#endif
+#ifndef __clang__
+//!@endcond
+#endif
+
+/*! \def RAPIDJSON_STATIC_ASSERT
+    \brief (Internal) macro to check for conditions at compile-time
+    \param x compile-time condition
+    \hideinitializer
+ */
+#define RAPIDJSON_STATIC_ASSERT(x) \
+    typedef ::RAPIDJSON_NAMESPACE::StaticAssertTest< \
+      sizeof(::RAPIDJSON_NAMESPACE::STATIC_ASSERTION_FAILURE<bool(x) >)> \
+    RAPIDJSON_JOIN(StaticAssertTypedef, __LINE__) RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE
+#endif // RAPIDJSON_STATIC_ASSERT
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_LIKELY, RAPIDJSON_UNLIKELY
+
+//! Compiler branching hint for expression with high probability to be true.
+/*!
+    \ingroup RAPIDJSON_CONFIG
+    \param x Boolean expression likely to be true.
+*/
+#ifndef RAPIDJSON_LIKELY
+#if defined(__GNUC__) || defined(__clang__)
+#define RAPIDJSON_LIKELY(x) __builtin_expect(!!(x), 1)
+#else
+#define RAPIDJSON_LIKELY(x) (x)
+#endif
+#endif
+
+//! Compiler branching hint for expression with low probability to be true.
+/*!
+    \ingroup RAPIDJSON_CONFIG
+    \param x Boolean expression unlikely to be true.
+*/
+#ifndef RAPIDJSON_UNLIKELY
+#if defined(__GNUC__) || defined(__clang__)
+#define RAPIDJSON_UNLIKELY(x) __builtin_expect(!!(x), 0)
+#else
+#define RAPIDJSON_UNLIKELY(x) (x)
+#endif
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// Helpers
+
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+
+#define RAPIDJSON_MULTILINEMACRO_BEGIN do {  
+#define RAPIDJSON_MULTILINEMACRO_END \
+} while((void)0, 0)
+
+// adopted from Boost
+#define RAPIDJSON_VERSION_CODE(x,y,z) \
+  (((x)*100000) + ((y)*100) + (z))
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_DIAG_PUSH/POP, RAPIDJSON_DIAG_OFF
+
+#if defined(__GNUC__)
+#define RAPIDJSON_GNUC \
+    RAPIDJSON_VERSION_CODE(__GNUC__,__GNUC_MINOR__,__GNUC_PATCHLEVEL__)
+#endif
+
+#if defined(__clang__) || (defined(RAPIDJSON_GNUC) && RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,2,0))
+
+#define RAPIDJSON_PRAGMA(x) _Pragma(RAPIDJSON_STRINGIFY(x))
+#define RAPIDJSON_DIAG_PRAGMA(x) RAPIDJSON_PRAGMA(GCC diagnostic x)
+#define RAPIDJSON_DIAG_OFF(x) \
+    RAPIDJSON_DIAG_PRAGMA(ignored RAPIDJSON_STRINGIFY(RAPIDJSON_JOIN(-W,x)))
+
+// push/pop support in Clang and GCC>=4.6
+#if defined(__clang__) || (defined(RAPIDJSON_GNUC) && RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,6,0))
+#define RAPIDJSON_DIAG_PUSH RAPIDJSON_DIAG_PRAGMA(push)
+#define RAPIDJSON_DIAG_POP  RAPIDJSON_DIAG_PRAGMA(pop)
+#else // GCC >= 4.2, < 4.6
+#define RAPIDJSON_DIAG_PUSH /* ignored */
+#define RAPIDJSON_DIAG_POP /* ignored */
+#endif
+
+#elif defined(_MSC_VER)
+
+// pragma (MSVC specific)
+#define RAPIDJSON_PRAGMA(x) __pragma(x)
+#define RAPIDJSON_DIAG_PRAGMA(x) RAPIDJSON_PRAGMA(warning(x))
+
+#define RAPIDJSON_DIAG_OFF(x) RAPIDJSON_DIAG_PRAGMA(disable: x)
+#define RAPIDJSON_DIAG_PUSH RAPIDJSON_DIAG_PRAGMA(push)
+#define RAPIDJSON_DIAG_POP  RAPIDJSON_DIAG_PRAGMA(pop)
+
+#else
+
+#define RAPIDJSON_DIAG_OFF(x) /* ignored */
+#define RAPIDJSON_DIAG_PUSH   /* ignored */
+#define RAPIDJSON_DIAG_POP    /* ignored */
+
+#endif // RAPIDJSON_DIAG_*
+
+///////////////////////////////////////////////////////////////////////////////
+// C++11 features
+
+#ifndef RAPIDJSON_HAS_CXX11_RVALUE_REFS
+#if defined(__clang__)
+#if __has_feature(cxx_rvalue_references) && \
+    (defined(_LIBCPP_VERSION) || defined(__GLIBCXX__) && __GLIBCXX__ >= 20080306)
+#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 1
+#else
+#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 0
+#endif
+#elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,3,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || \
+      (defined(_MSC_VER) && _MSC_VER >= 1600)
+
+#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 1
+#else
+#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 0
+#endif
+#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS
+
+#ifndef RAPIDJSON_HAS_CXX11_NOEXCEPT
+#if defined(__clang__)
+#define RAPIDJSON_HAS_CXX11_NOEXCEPT __has_feature(cxx_noexcept)
+#elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,6,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__))
+//    (defined(_MSC_VER) && _MSC_VER >= ????) // not yet supported
+#define RAPIDJSON_HAS_CXX11_NOEXCEPT 1
+#else
+#define RAPIDJSON_HAS_CXX11_NOEXCEPT 0
+#endif
+#endif
+#if RAPIDJSON_HAS_CXX11_NOEXCEPT
+#define RAPIDJSON_NOEXCEPT noexcept
+#else
+#define RAPIDJSON_NOEXCEPT /* noexcept */
+#endif // RAPIDJSON_HAS_CXX11_NOEXCEPT
+
+// no automatic detection, yet
+#ifndef RAPIDJSON_HAS_CXX11_TYPETRAITS
+#define RAPIDJSON_HAS_CXX11_TYPETRAITS 0
+#endif
+
+#ifndef RAPIDJSON_HAS_CXX11_RANGE_FOR
+#if defined(__clang__)
+#define RAPIDJSON_HAS_CXX11_RANGE_FOR __has_feature(cxx_range_for)
+#elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,6,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || \
+      (defined(_MSC_VER) && _MSC_VER >= 1700)
+#define RAPIDJSON_HAS_CXX11_RANGE_FOR 1
+#else
+#define RAPIDJSON_HAS_CXX11_RANGE_FOR 0
+#endif
+#endif // RAPIDJSON_HAS_CXX11_RANGE_FOR
+
+//!@endcond
+
+///////////////////////////////////////////////////////////////////////////////
+// new/delete
+
+#ifndef RAPIDJSON_NEW
+///! customization point for global \c new
+#define RAPIDJSON_NEW(TypeName) new TypeName
+#endif
+#ifndef RAPIDJSON_DELETE
+///! customization point for global \c delete
+#define RAPIDJSON_DELETE(x) delete x
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// Type
+
+/*! \namespace rapidjson
+    \brief main RapidJSON namespace
+    \see RAPIDJSON_NAMESPACE
+*/
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Type of JSON value
+enum Type {
+    kNullType = 0,      //!< null
+    kFalseType = 1,     //!< false
+    kTrueType = 2,      //!< true
+    kObjectType = 3,    //!< object
+    kArrayType = 4,     //!< array 
+    kStringType = 5,    //!< string
+    kNumberType = 6     //!< number
+};
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_RAPIDJSON_H_
diff --git a/external/rapidjson/reader.h b/external/rapidjson/reader.h
new file mode 100644
index 0000000..681dec2
--- /dev/null
+++ b/external/rapidjson/reader.h
@@ -0,0 +1,2222 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+//
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_READER_H_
+#define RAPIDJSON_READER_H_
+
+/*! \file reader.h */
+
+#include "allocators.h"
+#include "stream.h"
+#include "encodedstream.h"
+#include "internal/meta.h"
+#include "internal/stack.h"
+#include "internal/strtod.h"
+#include <limits>
+
+#if defined(RAPIDJSON_SIMD) && defined(_MSC_VER)
+#include <intrin.h>
+#pragma intrinsic(_BitScanForward)
+#endif
+#ifdef RAPIDJSON_SSE42
+#include <nmmintrin.h>
+#elif defined(RAPIDJSON_SSE2)
+#include <emmintrin.h>
+#elif defined(RAPIDJSON_NEON)
+#include <arm_neon.h>
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4127)  // conditional expression is constant
+RAPIDJSON_DIAG_OFF(4702)  // unreachable code
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(old-style-cast)
+RAPIDJSON_DIAG_OFF(padded)
+RAPIDJSON_DIAG_OFF(switch-enum)
+#endif
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+#define RAPIDJSON_NOTHING /* deliberately empty */
+#ifndef RAPIDJSON_PARSE_ERROR_EARLY_RETURN
+#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN(value) \
+    RAPIDJSON_MULTILINEMACRO_BEGIN \
+    if (RAPIDJSON_UNLIKELY(HasParseError())) { return value; } \
+    RAPIDJSON_MULTILINEMACRO_END
+#endif
+#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID \
+    RAPIDJSON_PARSE_ERROR_EARLY_RETURN(RAPIDJSON_NOTHING)
+//!@endcond
+
+/*! \def RAPIDJSON_PARSE_ERROR_NORETURN
+    \ingroup RAPIDJSON_ERRORS
+    \brief Macro to indicate a parse error.
+    \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
+    \param offset  position of the error in JSON input (\c size_t)
+
+    This macros can be used as a customization point for the internal
+    error handling mechanism of RapidJSON.
+
+    A common usage model is to throw an exception instead of requiring the
+    caller to explicitly check the \ref rapidjson::GenericReader::Parse's
+    return value:
+
+    \code
+    #define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode,offset) \
+       throw ParseException(parseErrorCode, #parseErrorCode, offset)
+
+    #include <stdexcept>               // std::runtime_error
+    #include "rapidjson/error/error.h" // rapidjson::ParseResult
+
+    struct ParseException : std::runtime_error, rapidjson::ParseResult {
+      ParseException(rapidjson::ParseErrorCode code, const char* msg, size_t offset)
+        : std::runtime_error(msg), ParseResult(code, offset) {}
+    };
+
+    #include "rapidjson/reader.h"
+    \endcode
+
+    \see RAPIDJSON_PARSE_ERROR, rapidjson::GenericReader::Parse
+ */
+#ifndef RAPIDJSON_PARSE_ERROR_NORETURN
+#define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset) \
+    RAPIDJSON_MULTILINEMACRO_BEGIN \
+    RAPIDJSON_ASSERT(!HasParseError()); /* Error can only be assigned once */ \
+    SetParseError(parseErrorCode, offset); \
+    RAPIDJSON_MULTILINEMACRO_END
+#endif
+
+/*! \def RAPIDJSON_PARSE_ERROR
+    \ingroup RAPIDJSON_ERRORS
+    \brief (Internal) macro to indicate and handle a parse error.
+    \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
+    \param offset  position of the error in JSON input (\c size_t)
+
+    Invokes RAPIDJSON_PARSE_ERROR_NORETURN and stops the parsing.
+
+    \see RAPIDJSON_PARSE_ERROR_NORETURN
+    \hideinitializer
+ */
+#ifndef RAPIDJSON_PARSE_ERROR
+#define RAPIDJSON_PARSE_ERROR(parseErrorCode, offset) \
+    RAPIDJSON_MULTILINEMACRO_BEGIN \
+    RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset); \
+    RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID; \
+    RAPIDJSON_MULTILINEMACRO_END
+#endif
+
+#include "error/error.h" // ParseErrorCode, ParseResult
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+// ParseFlag
+
+/*! \def RAPIDJSON_PARSE_DEFAULT_FLAGS
+    \ingroup RAPIDJSON_CONFIG
+    \brief User-defined kParseDefaultFlags definition.
+
+    User can define this as any \c ParseFlag combinations.
+*/
+#ifndef RAPIDJSON_PARSE_DEFAULT_FLAGS
+#define RAPIDJSON_PARSE_DEFAULT_FLAGS kParseNoFlags
+#endif
+
+//! Combination of parseFlags
+/*! \see Reader::Parse, Document::Parse, Document::ParseInsitu, Document::ParseStream
+ */
+enum ParseFlag {
+    kParseNoFlags = 0,              //!< No flags are set.
+    kParseInsituFlag = 1,           //!< In-situ(destructive) parsing.
+    kParseValidateEncodingFlag = 2, //!< Validate encoding of JSON strings.
+    kParseIterativeFlag = 4,        //!< Iterative(constant complexity in terms of function call stack size) parsing.
+    kParseStopWhenDoneFlag = 8,     //!< After parsing a complete JSON root from stream, stop further processing the rest of stream. When this flag is used, parser will not generate kParseErrorDocumentRootNotSingular error.
+    kParseFullPrecisionFlag = 16,   //!< Parse number in full precision (but slower).
+    kParseCommentsFlag = 32,        //!< Allow one-line (//) and multi-line (/**/) comments.
+    kParseNumbersAsStringsFlag = 64,    //!< Parse all numbers (ints/doubles) as strings.
+    kParseTrailingCommasFlag = 128, //!< Allow trailing commas at the end of objects and arrays.
+    kParseNanAndInfFlag = 256,      //!< Allow parsing NaN, Inf, Infinity, -Inf and -Infinity as doubles.
+    kParseDefaultFlags = RAPIDJSON_PARSE_DEFAULT_FLAGS  //!< Default parse flags. Can be customized by defining RAPIDJSON_PARSE_DEFAULT_FLAGS
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Handler
+
+/*! \class rapidjson::Handler
+    \brief Concept for receiving events from GenericReader upon parsing.
+    The functions return true if no error occurs. If they return false,
+    the event publisher should terminate the process.
+\code
+concept Handler {
+    typename Ch;
+
+    bool Null();
+    bool Bool(bool b);
+    bool Int(int i);
+    bool Uint(unsigned i);
+    bool Int64(int64_t i);
+    bool Uint64(uint64_t i);
+    bool Double(double d);
+    /// enabled via kParseNumbersAsStringsFlag, string is not null-terminated (use length)
+    bool RawNumber(const Ch* str, SizeType length, bool copy);
+    bool String(const Ch* str, SizeType length, bool copy);
+    bool StartObject();
+    bool Key(const Ch* str, SizeType length, bool copy);
+    bool EndObject(SizeType memberCount);
+    bool StartArray();
+    bool EndArray(SizeType elementCount);
+};
+\endcode
+*/
+///////////////////////////////////////////////////////////////////////////////
+// BaseReaderHandler
+
+//! Default implementation of Handler.
+/*! This can be used as base class of any reader handler.
+    \note implements Handler concept
+*/
+template<typename Encoding = UTF8<>, typename Derived = void>
+struct BaseReaderHandler {
+    typedef typename Encoding::Ch Ch;
+
+    typedef typename internal::SelectIf<internal::IsSame<Derived, void>, BaseReaderHandler, Derived>::Type Override;
+
+    bool Default() { return true; }
+    bool Null() { return static_cast<Override&>(*this).Default(); }
+    bool Bool(bool) { return static_cast<Override&>(*this).Default(); }
+    bool Int(int) { return static_cast<Override&>(*this).Default(); }
+    bool Uint(unsigned) { return static_cast<Override&>(*this).Default(); }
+    bool Int64(int64_t) { return static_cast<Override&>(*this).Default(); }
+    bool Uint64(uint64_t) { return static_cast<Override&>(*this).Default(); }
+    bool Double(double) { return static_cast<Override&>(*this).Default(); }
+    /// enabled via kParseNumbersAsStringsFlag, string is not null-terminated (use length)
+    bool RawNumber(const Ch* str, SizeType len, bool copy) { return static_cast<Override&>(*this).String(str, len, copy); }
+    bool String(const Ch*, SizeType, bool) { return static_cast<Override&>(*this).Default(); }
+    bool StartObject() { return static_cast<Override&>(*this).Default(); }
+    bool Key(const Ch* str, SizeType len, bool copy) { return static_cast<Override&>(*this).String(str, len, copy); }
+    bool EndObject(SizeType) { return static_cast<Override&>(*this).Default(); }
+    bool StartArray() { return static_cast<Override&>(*this).Default(); }
+    bool EndArray(SizeType) { return static_cast<Override&>(*this).Default(); }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// StreamLocalCopy
+
+namespace internal {
+
+template<typename Stream, int = StreamTraits<Stream>::copyOptimization>
+class StreamLocalCopy;
+
+//! Do copy optimization.
+template<typename Stream>
+class StreamLocalCopy<Stream, 1> {
+public:
+    StreamLocalCopy(Stream& original) : s(original), original_(original) {}
+    ~StreamLocalCopy() { original_ = s; }
+
+    Stream s;
+
+private:
+    StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
+
+    Stream& original_;
+};
+
+//! Keep reference.
+template<typename Stream>
+class StreamLocalCopy<Stream, 0> {
+public:
+    StreamLocalCopy(Stream& original) : s(original) {}
+
+    Stream& s;
+
+private:
+    StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
+};
+
+} // namespace internal
+
+///////////////////////////////////////////////////////////////////////////////
+// SkipWhitespace
+
+//! Skip the JSON white spaces in a stream.
+/*! \param is A input stream for skipping white spaces.
+    \note This function has SSE2/SSE4.2 specialization.
+*/
+template<typename InputStream>
+void SkipWhitespace(InputStream& is) {
+    internal::StreamLocalCopy<InputStream> copy(is);
+    InputStream& s(copy.s);
+
+    typename InputStream::Ch c;
+    while ((c = s.Peek()) == ' ' || c == '\n' || c == '\r' || c == '\t')
+        s.Take();
+}
+
+inline const char* SkipWhitespace(const char* p, const char* end) {
+    while (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
+        ++p;
+    return p;
+}
+
+#ifdef RAPIDJSON_SSE42
+//! Skip whitespace with SSE 4.2 pcmpistrm instruction, testing 16 8-byte characters at once.
+inline const char *SkipWhitespace_SIMD(const char* p) {
+    // Fast return for single non-whitespace
+    if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
+        ++p;
+    else
+        return p;
+
+    // 16-byte align to the next boundary
+    const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+    while (p != nextAligned)
+        if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
+            ++p;
+        else
+            return p;
+
+    // The rest of string using SIMD
+    static const char whitespace[16] = " \n\r\t";
+    const __m128i w = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespace[0]));
+
+    for (;; p += 16) {
+        const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
+        const int r = _mm_cmpistri(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_LEAST_SIGNIFICANT | _SIDD_NEGATIVE_POLARITY);
+        if (r != 16)    // some of characters is non-whitespace
+            return p + r;
+    }
+}
+
+inline const char *SkipWhitespace_SIMD(const char* p, const char* end) {
+    // Fast return for single non-whitespace
+    if (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
+        ++p;
+    else
+        return p;
+
+    // The middle of string using SIMD
+    static const char whitespace[16] = " \n\r\t";
+    const __m128i w = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespace[0]));
+
+    for (; p <= end - 16; p += 16) {
+        const __m128i s = _mm_loadu_si128(reinterpret_cast<const __m128i *>(p));
+        const int r = _mm_cmpistri(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_LEAST_SIGNIFICANT | _SIDD_NEGATIVE_POLARITY);
+        if (r != 16)    // some of characters is non-whitespace
+            return p + r;
+    }
+
+    return SkipWhitespace(p, end);
+}
+
+#elif defined(RAPIDJSON_SSE2)
+
+//! Skip whitespace with SSE2 instructions, testing 16 8-byte characters at once.
+inline const char *SkipWhitespace_SIMD(const char* p) {
+    // Fast return for single non-whitespace
+    if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
+        ++p;
+    else
+        return p;
+
+    // 16-byte align to the next boundary
+    const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+    while (p != nextAligned)
+        if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
+            ++p;
+        else
+            return p;
+
+    // The rest of string
+    #define C16(c) { c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c }
+    static const char whitespaces[4][16] = { C16(' '), C16('\n'), C16('\r'), C16('\t') };
+    #undef C16
+
+    const __m128i w0 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[0][0]));
+    const __m128i w1 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[1][0]));
+    const __m128i w2 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[2][0]));
+    const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0]));
+
+    for (;; p += 16) {
+        const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
+        __m128i x = _mm_cmpeq_epi8(s, w0);
+        x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w1));
+        x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w2));
+        x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w3));
+        unsigned short r = static_cast<unsigned short>(~_mm_movemask_epi8(x));
+        if (r != 0) {   // some of characters may be non-whitespace
+#ifdef _MSC_VER         // Find the index of first non-whitespace
+            unsigned long offset;
+            _BitScanForward(&offset, r);
+            return p + offset;
+#else
+            return p + __builtin_ffs(r) - 1;
+#endif
+        }
+    }
+}
+
+inline const char *SkipWhitespace_SIMD(const char* p, const char* end) {
+    // Fast return for single non-whitespace
+    if (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
+        ++p;
+    else
+        return p;
+
+    // The rest of string
+    #define C16(c) { c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c }
+    static const char whitespaces[4][16] = { C16(' '), C16('\n'), C16('\r'), C16('\t') };
+    #undef C16
+
+    const __m128i w0 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[0][0]));
+    const __m128i w1 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[1][0]));
+    const __m128i w2 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[2][0]));
+    const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0]));
+
+    for (; p <= end - 16; p += 16) {
+        const __m128i s = _mm_loadu_si128(reinterpret_cast<const __m128i *>(p));
+        __m128i x = _mm_cmpeq_epi8(s, w0);
+        x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w1));
+        x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w2));
+        x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w3));
+        unsigned short r = static_cast<unsigned short>(~_mm_movemask_epi8(x));
+        if (r != 0) {   // some of characters may be non-whitespace
+#ifdef _MSC_VER         // Find the index of first non-whitespace
+            unsigned long offset;
+            _BitScanForward(&offset, r);
+            return p + offset;
+#else
+            return p + __builtin_ffs(r) - 1;
+#endif
+        }
+    }
+
+    return SkipWhitespace(p, end);
+}
+
+#elif defined(RAPIDJSON_NEON)
+
+//! Skip whitespace with ARM Neon instructions, testing 16 8-byte characters at once.
+inline const char *SkipWhitespace_SIMD(const char* p) {
+    // Fast return for single non-whitespace
+    if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
+        ++p;
+    else
+        return p;
+
+    // 16-byte align to the next boundary
+    const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+    while (p != nextAligned)
+        if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
+            ++p;
+        else
+            return p;
+
+    const uint8x16_t w0 = vmovq_n_u8(' ');
+    const uint8x16_t w1 = vmovq_n_u8('\n');
+    const uint8x16_t w2 = vmovq_n_u8('\r');
+    const uint8x16_t w3 = vmovq_n_u8('\t');
+
+    for (;; p += 16) {
+        const uint8x16_t s = vld1q_u8(reinterpret_cast<const uint8_t *>(p));
+        uint8x16_t x = vceqq_u8(s, w0);
+        x = vorrq_u8(x, vceqq_u8(s, w1));
+        x = vorrq_u8(x, vceqq_u8(s, w2));
+        x = vorrq_u8(x, vceqq_u8(s, w3));
+
+        x = vmvnq_u8(x);                       // Negate
+        x = vrev64q_u8(x);                     // Rev in 64
+        uint64_t low = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 0);   // extract
+        uint64_t high = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 1);  // extract
+
+        if (low == 0) {
+            if (high != 0) {
+                int lz =__builtin_clzll(high);;
+                return p + 8 + (lz >> 3);
+            }
+        } else {
+            int lz = __builtin_clzll(low);;
+            return p + (lz >> 3);
+        }
+    }
+}
+
+inline const char *SkipWhitespace_SIMD(const char* p, const char* end) {
+    // Fast return for single non-whitespace
+    if (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
+        ++p;
+    else
+        return p;
+
+    const uint8x16_t w0 = vmovq_n_u8(' ');
+    const uint8x16_t w1 = vmovq_n_u8('\n');
+    const uint8x16_t w2 = vmovq_n_u8('\r');
+    const uint8x16_t w3 = vmovq_n_u8('\t');
+
+    for (; p <= end - 16; p += 16) {
+        const uint8x16_t s = vld1q_u8(reinterpret_cast<const uint8_t *>(p));
+        uint8x16_t x = vceqq_u8(s, w0);
+        x = vorrq_u8(x, vceqq_u8(s, w1));
+        x = vorrq_u8(x, vceqq_u8(s, w2));
+        x = vorrq_u8(x, vceqq_u8(s, w3));
+
+        x = vmvnq_u8(x);                       // Negate
+        x = vrev64q_u8(x);                     // Rev in 64
+        uint64_t low = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 0);   // extract
+        uint64_t high = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 1);  // extract
+
+        if (low == 0) {
+            if (high != 0) {
+                int lz = __builtin_clzll(high);
+                return p + 8 + (lz >> 3);
+            }
+        } else {
+            int lz = __builtin_clzll(low);
+            return p + (lz >> 3);
+        }
+    }
+
+    return SkipWhitespace(p, end);
+}
+
+#endif // RAPIDJSON_NEON
+
+#ifdef RAPIDJSON_SIMD
+//! Template function specialization for InsituStringStream
+template<> inline void SkipWhitespace(InsituStringStream& is) {
+    is.src_ = const_cast<char*>(SkipWhitespace_SIMD(is.src_));
+}
+
+//! Template function specialization for StringStream
+template<> inline void SkipWhitespace(StringStream& is) {
+    is.src_ = SkipWhitespace_SIMD(is.src_);
+}
+
+template<> inline void SkipWhitespace(EncodedInputStream<UTF8<>, MemoryStream>& is) {
+    is.is_.src_ = SkipWhitespace_SIMD(is.is_.src_, is.is_.end_);
+}
+#endif // RAPIDJSON_SIMD
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericReader
+
+//! SAX-style JSON parser. Use \ref Reader for UTF8 encoding and default allocator.
+/*! GenericReader parses JSON text from a stream, and send events synchronously to an
+    object implementing Handler concept.
+
+    It needs to allocate a stack for storing a single decoded string during
+    non-destructive parsing.
+
+    For in-situ parsing, the decoded string is directly written to the source
+    text string, no temporary buffer is required.
+
+    A GenericReader object can be reused for parsing multiple JSON text.
+
+    \tparam SourceEncoding Encoding of the input stream.
+    \tparam TargetEncoding Encoding of the parse output.
+    \tparam StackAllocator Allocator type for stack.
+*/
+template <typename SourceEncoding, typename TargetEncoding, typename StackAllocator = CrtAllocator>
+class GenericReader {
+public:
+    typedef typename SourceEncoding::Ch Ch; //!< SourceEncoding character type
+
+    //! Constructor.
+    /*! \param stackAllocator Optional allocator for allocating stack memory. (Only use for non-destructive parsing)
+        \param stackCapacity stack capacity in bytes for storing a single decoded string.  (Only use for non-destructive parsing)
+    */
+    GenericReader(StackAllocator* stackAllocator = 0, size_t stackCapacity = kDefaultStackCapacity) :
+        stack_(stackAllocator, stackCapacity), parseResult_(), state_(IterativeParsingStartState) {}
+
+    //! Parse JSON text.
+    /*! \tparam parseFlags Combination of \ref ParseFlag.
+        \tparam InputStream Type of input stream, implementing Stream concept.
+        \tparam Handler Type of handler, implementing Handler concept.
+        \param is Input stream to be parsed.
+        \param handler The handler to receive events.
+        \return Whether the parsing is successful.
+    */
+    template <unsigned parseFlags, typename InputStream, typename Handler>
+    ParseResult Parse(InputStream& is, Handler& handler) {
+        if (parseFlags & kParseIterativeFlag)
+            return IterativeParse<parseFlags>(is, handler);
+
+        parseResult_.Clear();
+
+        ClearStackOnExit scope(*this);
+
+        SkipWhitespaceAndComments<parseFlags>(is);
+        RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
+
+        if (RAPIDJSON_UNLIKELY(is.Peek() == '\0')) {
+            RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorDocumentEmpty, is.Tell());
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
+        }
+        else {
+            ParseValue<parseFlags>(is, handler);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
+
+            if (!(parseFlags & kParseStopWhenDoneFlag)) {
+                SkipWhitespaceAndComments<parseFlags>(is);
+                RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
+
+                if (RAPIDJSON_UNLIKELY(is.Peek() != '\0')) {
+                    RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorDocumentRootNotSingular, is.Tell());
+                    RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
+                }
+            }
+        }
+
+        return parseResult_;
+    }
+
+    //! Parse JSON text (with \ref kParseDefaultFlags)
+    /*! \tparam InputStream Type of input stream, implementing Stream concept
+        \tparam Handler Type of handler, implementing Handler concept.
+        \param is Input stream to be parsed.
+        \param handler The handler to receive events.
+        \return Whether the parsing is successful.
+    */
+    template <typename InputStream, typename Handler>
+    ParseResult Parse(InputStream& is, Handler& handler) {
+        return Parse<kParseDefaultFlags>(is, handler);
+    }
+
+    //! Initialize JSON text token-by-token parsing
+    /*!
+     */
+    void IterativeParseInit() {
+        parseResult_.Clear();
+        state_ = IterativeParsingStartState;
+    }
+    
+    //! Parse one token from JSON text
+    /*! \tparam InputStream Type of input stream, implementing Stream concept
+        \tparam Handler Type of handler, implementing Handler concept.
+        \param is Input stream to be parsed.
+        \param handler The handler to receive events.
+        \return Whether the parsing is successful.
+     */
+    template <unsigned parseFlags, typename InputStream, typename Handler>
+    bool IterativeParseNext(InputStream& is, Handler& handler) {
+        while (RAPIDJSON_LIKELY(is.Peek() != '\0')) {
+            SkipWhitespaceAndComments<parseFlags>(is);
+            
+            Token t = Tokenize(is.Peek());
+            IterativeParsingState n = Predict(state_, t);
+            IterativeParsingState d = Transit<parseFlags>(state_, t, n, is, handler);
+            
+            // If we've finished or hit an error...
+            if (RAPIDJSON_UNLIKELY(IsIterativeParsingCompleteState(d))) {
+                // Report errors.
+                if (d == IterativeParsingErrorState) {
+                    HandleError(state_, is);
+                    return false;
+                }
+            
+                // Transition to the finish state.
+                RAPIDJSON_ASSERT(d == IterativeParsingFinishState);
+                state_ = d;
+                
+                // If StopWhenDone is not set...
+                if (!(parseFlags & kParseStopWhenDoneFlag)) {
+                    // ... and extra non-whitespace data is found...
+                    SkipWhitespaceAndComments<parseFlags>(is);
+                    if (is.Peek() != '\0') {
+                        // ... this is considered an error.
+                        HandleError(state_, is);
+                        return false;
+                    }
+                }
+                
+                // Success! We are done!
+                return true;
+            }
+            
+            // Transition to the new state.
+            state_ = d;
+
+            // If we parsed anything other than a delimiter, we invoked the handler, so we can return true now.
+            if (!IsIterativeParsingDelimiterState(n))
+                return true;
+        }
+        
+        // We reached the end of file.
+        stack_.Clear();
+
+        if (state_ != IterativeParsingFinishState) {
+            HandleError(state_, is);
+            return false;
+        }
+        
+        return true;
+    }
+    
+    //! Check if token-by-token parsing JSON text is complete
+    /*! \return Whether the JSON has been fully decoded.
+     */
+    RAPIDJSON_FORCEINLINE bool IterativeParseComplete() {
+        return IsIterativeParsingCompleteState(state_);
+    }
+
+    //! Whether a parse error has occured in the last parsing.
+    bool HasParseError() const { return parseResult_.IsError(); }
+
+    //! Get the \ref ParseErrorCode of last parsing.
+    ParseErrorCode GetParseErrorCode() const { return parseResult_.Code(); }
+
+    //! Get the position of last parsing error in input, 0 otherwise.
+    size_t GetErrorOffset() const { return parseResult_.Offset(); }
+
+protected:
+    void SetParseError(ParseErrorCode code, size_t offset) { parseResult_.Set(code, offset); }
+
+private:
+    // Prohibit copy constructor & assignment operator.
+    GenericReader(const GenericReader&);
+    GenericReader& operator=(const GenericReader&);
+
+    void ClearStack() { stack_.Clear(); }
+
+    // clear stack on any exit from ParseStream, e.g. due to exception
+    struct ClearStackOnExit {
+        explicit ClearStackOnExit(GenericReader& r) : r_(r) {}
+        ~ClearStackOnExit() { r_.ClearStack(); }
+    private:
+        GenericReader& r_;
+        ClearStackOnExit(const ClearStackOnExit&);
+        ClearStackOnExit& operator=(const ClearStackOnExit&);
+    };
+
+    template<unsigned parseFlags, typename InputStream>
+    void SkipWhitespaceAndComments(InputStream& is) {
+        SkipWhitespace(is);
+
+        if (parseFlags & kParseCommentsFlag) {
+            while (RAPIDJSON_UNLIKELY(Consume(is, '/'))) {
+                if (Consume(is, '*')) {
+                    while (true) {
+                        if (RAPIDJSON_UNLIKELY(is.Peek() == '\0'))
+                            RAPIDJSON_PARSE_ERROR(kParseErrorUnspecificSyntaxError, is.Tell());
+                        else if (Consume(is, '*')) {
+                            if (Consume(is, '/'))
+                                break;
+                        }
+                        else
+                            is.Take();
+                    }
+                }
+                else if (RAPIDJSON_LIKELY(Consume(is, '/')))
+                    while (is.Peek() != '\0' && is.Take() != '\n') {}
+                else
+                    RAPIDJSON_PARSE_ERROR(kParseErrorUnspecificSyntaxError, is.Tell());
+
+                SkipWhitespace(is);
+            }
+        }
+    }
+
+    // Parse object: { string : value, ... }
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseObject(InputStream& is, Handler& handler) {
+        RAPIDJSON_ASSERT(is.Peek() == '{');
+        is.Take();  // Skip '{'
+
+        if (RAPIDJSON_UNLIKELY(!handler.StartObject()))
+            RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+
+        SkipWhitespaceAndComments<parseFlags>(is);
+        RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+        if (Consume(is, '}')) {
+            if (RAPIDJSON_UNLIKELY(!handler.EndObject(0)))  // empty object
+                RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+            return;
+        }
+
+        for (SizeType memberCount = 0;;) {
+            if (RAPIDJSON_UNLIKELY(is.Peek() != '"'))
+                RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissName, is.Tell());
+
+            ParseString<parseFlags>(is, handler, true);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+            SkipWhitespaceAndComments<parseFlags>(is);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+            if (RAPIDJSON_UNLIKELY(!Consume(is, ':')))
+                RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissColon, is.Tell());
+
+            SkipWhitespaceAndComments<parseFlags>(is);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+            ParseValue<parseFlags>(is, handler);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+            SkipWhitespaceAndComments<parseFlags>(is);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+            ++memberCount;
+
+            switch (is.Peek()) {
+                case ',':
+                    is.Take();
+                    SkipWhitespaceAndComments<parseFlags>(is);
+                    RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+                    break;
+                case '}':
+                    is.Take();
+                    if (RAPIDJSON_UNLIKELY(!handler.EndObject(memberCount)))
+                        RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+                    return;
+                default:
+                    RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissCommaOrCurlyBracket, is.Tell()); break; // This useless break is only for making warning and coverage happy
+            }
+
+            if (parseFlags & kParseTrailingCommasFlag) {
+                if (is.Peek() == '}') {
+                    if (RAPIDJSON_UNLIKELY(!handler.EndObject(memberCount)))
+                        RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+                    is.Take();
+                    return;
+                }
+            }
+        }
+    }
+
+    // Parse array: [ value, ... ]
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseArray(InputStream& is, Handler& handler) {
+        RAPIDJSON_ASSERT(is.Peek() == '[');
+        is.Take();  // Skip '['
+
+        if (RAPIDJSON_UNLIKELY(!handler.StartArray()))
+            RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+
+        SkipWhitespaceAndComments<parseFlags>(is);
+        RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+        if (Consume(is, ']')) {
+            if (RAPIDJSON_UNLIKELY(!handler.EndArray(0))) // empty array
+                RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+            return;
+        }
+
+        for (SizeType elementCount = 0;;) {
+            ParseValue<parseFlags>(is, handler);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+            ++elementCount;
+            SkipWhitespaceAndComments<parseFlags>(is);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+
+            if (Consume(is, ',')) {
+                SkipWhitespaceAndComments<parseFlags>(is);
+                RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+            }
+            else if (Consume(is, ']')) {
+                if (RAPIDJSON_UNLIKELY(!handler.EndArray(elementCount)))
+                    RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+                return;
+            }
+            else
+                RAPIDJSON_PARSE_ERROR(kParseErrorArrayMissCommaOrSquareBracket, is.Tell());
+
+            if (parseFlags & kParseTrailingCommasFlag) {
+                if (is.Peek() == ']') {
+                    if (RAPIDJSON_UNLIKELY(!handler.EndArray(elementCount)))
+                        RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+                    is.Take();
+                    return;
+                }
+            }
+        }
+    }
+
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseNull(InputStream& is, Handler& handler) {
+        RAPIDJSON_ASSERT(is.Peek() == 'n');
+        is.Take();
+
+        if (RAPIDJSON_LIKELY(Consume(is, 'u') && Consume(is, 'l') && Consume(is, 'l'))) {
+            if (RAPIDJSON_UNLIKELY(!handler.Null()))
+                RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+        }
+        else
+            RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell());
+    }
+
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseTrue(InputStream& is, Handler& handler) {
+        RAPIDJSON_ASSERT(is.Peek() == 't');
+        is.Take();
+
+        if (RAPIDJSON_LIKELY(Consume(is, 'r') && Consume(is, 'u') && Consume(is, 'e'))) {
+            if (RAPIDJSON_UNLIKELY(!handler.Bool(true)))
+                RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+        }
+        else
+            RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell());
+    }
+
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseFalse(InputStream& is, Handler& handler) {
+        RAPIDJSON_ASSERT(is.Peek() == 'f');
+        is.Take();
+
+        if (RAPIDJSON_LIKELY(Consume(is, 'a') && Consume(is, 'l') && Consume(is, 's') && Consume(is, 'e'))) {
+            if (RAPIDJSON_UNLIKELY(!handler.Bool(false)))
+                RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
+        }
+        else
+            RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell());
+    }
+
+    template<typename InputStream>
+    RAPIDJSON_FORCEINLINE static bool Consume(InputStream& is, typename InputStream::Ch expect) {
+        if (RAPIDJSON_LIKELY(is.Peek() == expect)) {
+            is.Take();
+            return true;
+        }
+        else
+            return false;
+    }
+
+    // Helper function to parse four hexidecimal digits in \uXXXX in ParseString().
+    template<typename InputStream>
+    unsigned ParseHex4(InputStream& is, size_t escapeOffset) {
+        unsigned codepoint = 0;
+        for (int i = 0; i < 4; i++) {
+            Ch c = is.Peek();
+            codepoint <<= 4;
+            codepoint += static_cast<unsigned>(c);
+            if (c >= '0' && c <= '9')
+                codepoint -= '0';
+            else if (c >= 'A' && c <= 'F')
+                codepoint -= 'A' - 10;
+            else if (c >= 'a' && c <= 'f')
+                codepoint -= 'a' - 10;
+            else {
+                RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorStringUnicodeEscapeInvalidHex, escapeOffset);
+                RAPIDJSON_PARSE_ERROR_EARLY_RETURN(0);
+            }
+            is.Take();
+        }
+        return codepoint;
+    }
+
+    template <typename CharType>
+    class StackStream {
+    public:
+        typedef CharType Ch;
+
+        StackStream(internal::Stack<StackAllocator>& stack) : stack_(stack), length_(0) {}
+        RAPIDJSON_FORCEINLINE void Put(Ch c) {
+            *stack_.template Push<Ch>() = c;
+            ++length_;
+        }
+
+        RAPIDJSON_FORCEINLINE void* Push(SizeType count) {
+            length_ += count;
+            return stack_.template Push<Ch>(count);
+        }
+
+        size_t Length() const { return length_; }
+
+        Ch* Pop() {
+            return stack_.template Pop<Ch>(length_);
+        }
+
+    private:
+        StackStream(const StackStream&);
+        StackStream& operator=(const StackStream&);
+
+        internal::Stack<StackAllocator>& stack_;
+        SizeType length_;
+    };
+
+    // Parse string and generate String event. Different code paths for kParseInsituFlag.
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseString(InputStream& is, Handler& handler, bool isKey = false) {
+        internal::StreamLocalCopy<InputStream> copy(is);
+        InputStream& s(copy.s);
+
+        RAPIDJSON_ASSERT(s.Peek() == '\"');
+        s.Take();  // Skip '\"'
+
+        bool success = false;
+        if (parseFlags & kParseInsituFlag) {
+            typename InputStream::Ch *head = s.PutBegin();
+            ParseStringToStream<parseFlags, SourceEncoding, SourceEncoding>(s, s);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+            size_t length = s.PutEnd(head) - 1;
+            RAPIDJSON_ASSERT(length <= 0xFFFFFFFF);
+            const typename TargetEncoding::Ch* const str = reinterpret_cast<typename TargetEncoding::Ch*>(head);
+            success = (isKey ? handler.Key(str, SizeType(length), false) : handler.String(str, SizeType(length), false));
+        }
+        else {
+            StackStream<typename TargetEncoding::Ch> stackStream(stack_);
+            ParseStringToStream<parseFlags, SourceEncoding, TargetEncoding>(s, stackStream);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+            SizeType length = static_cast<SizeType>(stackStream.Length()) - 1;
+            const typename TargetEncoding::Ch* const str = stackStream.Pop();
+            success = (isKey ? handler.Key(str, length, true) : handler.String(str, length, true));
+        }
+        if (RAPIDJSON_UNLIKELY(!success))
+            RAPIDJSON_PARSE_ERROR(kParseErrorTermination, s.Tell());
+    }
+
+    // Parse string to an output is
+    // This function handles the prefix/suffix double quotes, escaping, and optional encoding validation.
+    template<unsigned parseFlags, typename SEncoding, typename TEncoding, typename InputStream, typename OutputStream>
+    RAPIDJSON_FORCEINLINE void ParseStringToStream(InputStream& is, OutputStream& os) {
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+        static const char escape[256] = {
+            Z16, Z16, 0, 0,'\"', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'/',
+            Z16, Z16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'\\', 0, 0, 0,
+            0, 0,'\b', 0, 0, 0,'\f', 0, 0, 0, 0, 0, 0, 0,'\n', 0,
+            0, 0,'\r', 0,'\t', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16
+        };
+#undef Z16
+//!@endcond
+
+        for (;;) {
+            // Scan and copy string before "\\\"" or < 0x20. This is an optional optimzation.
+            if (!(parseFlags & kParseValidateEncodingFlag))
+                ScanCopyUnescapedString(is, os);
+
+            Ch c = is.Peek();
+            if (RAPIDJSON_UNLIKELY(c == '\\')) {    // Escape
+                size_t escapeOffset = is.Tell();    // For invalid escaping, report the inital '\\' as error offset
+                is.Take();
+                Ch e = is.Peek();
+                if ((sizeof(Ch) == 1 || unsigned(e) < 256) && RAPIDJSON_LIKELY(escape[static_cast<unsigned char>(e)])) {
+                    is.Take();
+                    os.Put(static_cast<typename TEncoding::Ch>(escape[static_cast<unsigned char>(e)]));
+                }
+                else if (RAPIDJSON_LIKELY(e == 'u')) {    // Unicode
+                    is.Take();
+                    unsigned codepoint = ParseHex4(is, escapeOffset);
+                    RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+                    if (RAPIDJSON_UNLIKELY(codepoint >= 0xD800 && codepoint <= 0xDBFF)) {
+                        // Handle UTF-16 surrogate pair
+                        if (RAPIDJSON_UNLIKELY(!Consume(is, '\\') || !Consume(is, 'u')))
+                            RAPIDJSON_PARSE_ERROR(kParseErrorStringUnicodeSurrogateInvalid, escapeOffset);
+                        unsigned codepoint2 = ParseHex4(is, escapeOffset);
+                        RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+                        if (RAPIDJSON_UNLIKELY(codepoint2 < 0xDC00 || codepoint2 > 0xDFFF))
+                            RAPIDJSON_PARSE_ERROR(kParseErrorStringUnicodeSurrogateInvalid, escapeOffset);
+                        codepoint = (((codepoint - 0xD800) << 10) | (codepoint2 - 0xDC00)) + 0x10000;
+                    }
+                    TEncoding::Encode(os, codepoint);
+                }
+                else
+                    RAPIDJSON_PARSE_ERROR(kParseErrorStringEscapeInvalid, escapeOffset);
+            }
+            else if (RAPIDJSON_UNLIKELY(c == '"')) {    // Closing double quote
+                is.Take();
+                os.Put('\0');   // null-terminate the string
+                return;
+            }
+            else if (RAPIDJSON_UNLIKELY(static_cast<unsigned>(c) < 0x20)) { // RFC 4627: unescaped = %x20-21 / %x23-5B / %x5D-10FFFF
+                if (c == '\0')
+                    RAPIDJSON_PARSE_ERROR(kParseErrorStringMissQuotationMark, is.Tell());
+                else
+                    RAPIDJSON_PARSE_ERROR(kParseErrorStringInvalidEncoding, is.Tell());
+            }
+            else {
+                size_t offset = is.Tell();
+                if (RAPIDJSON_UNLIKELY((parseFlags & kParseValidateEncodingFlag ?
+                    !Transcoder<SEncoding, TEncoding>::Validate(is, os) :
+                    !Transcoder<SEncoding, TEncoding>::Transcode(is, os))))
+                    RAPIDJSON_PARSE_ERROR(kParseErrorStringInvalidEncoding, offset);
+            }
+        }
+    }
+
+    template<typename InputStream, typename OutputStream>
+    static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(InputStream&, OutputStream&) {
+            // Do nothing for generic version
+    }
+
+#if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42)
+    // StringStream -> StackStream<char>
+    static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(StringStream& is, StackStream<char>& os) {
+        const char* p = is.src_;
+
+        // Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
+        const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+        while (p != nextAligned)
+            if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
+                is.src_ = p;
+                return;
+            }
+            else
+                os.Put(*p++);
+
+        // The rest of string using SIMD
+        static const char dquote[16] = { '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"' };
+        static const char bslash[16] = { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' };
+        static const char space[16]  = { 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F };
+        const __m128i dq = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&dquote[0]));
+        const __m128i bs = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&bslash[0]));
+        const __m128i sp = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&space[0]));
+
+        for (;; p += 16) {
+            const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
+            const __m128i t1 = _mm_cmpeq_epi8(s, dq);
+            const __m128i t2 = _mm_cmpeq_epi8(s, bs);
+            const __m128i t3 = _mm_cmpeq_epi8(_mm_max_epu8(s, sp), sp); // s < 0x20 <=> max(s, 0x1F) == 0x1F
+            const __m128i x = _mm_or_si128(_mm_or_si128(t1, t2), t3);
+            unsigned short r = static_cast<unsigned short>(_mm_movemask_epi8(x));
+            if (RAPIDJSON_UNLIKELY(r != 0)) {   // some of characters is escaped
+                SizeType length;
+    #ifdef _MSC_VER         // Find the index of first escaped
+                unsigned long offset;
+                _BitScanForward(&offset, r);
+                length = offset;
+    #else
+                length = static_cast<SizeType>(__builtin_ffs(r) - 1);
+    #endif
+                if (length != 0) {
+                    char* q = reinterpret_cast<char*>(os.Push(length));
+                    for (size_t i = 0; i < length; i++)
+                        q[i] = p[i];
+
+                    p += length;
+                }
+                break;
+            }
+            _mm_storeu_si128(reinterpret_cast<__m128i *>(os.Push(16)), s);
+        }
+
+        is.src_ = p;
+    }
+
+    // InsituStringStream -> InsituStringStream
+    static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(InsituStringStream& is, InsituStringStream& os) {
+        RAPIDJSON_ASSERT(&is == &os);
+        (void)os;
+
+        if (is.src_ == is.dst_) {
+            SkipUnescapedString(is);
+            return;
+        }
+
+        char* p = is.src_;
+        char *q = is.dst_;
+
+        // Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
+        const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+        while (p != nextAligned)
+            if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
+                is.src_ = p;
+                is.dst_ = q;
+                return;
+            }
+            else
+                *q++ = *p++;
+
+        // The rest of string using SIMD
+        static const char dquote[16] = { '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"' };
+        static const char bslash[16] = { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' };
+        static const char space[16] = { 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F };
+        const __m128i dq = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&dquote[0]));
+        const __m128i bs = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&bslash[0]));
+        const __m128i sp = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&space[0]));
+
+        for (;; p += 16, q += 16) {
+            const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
+            const __m128i t1 = _mm_cmpeq_epi8(s, dq);
+            const __m128i t2 = _mm_cmpeq_epi8(s, bs);
+            const __m128i t3 = _mm_cmpeq_epi8(_mm_max_epu8(s, sp), sp); // s < 0x20 <=> max(s, 0x1F) == 0x1F
+            const __m128i x = _mm_or_si128(_mm_or_si128(t1, t2), t3);
+            unsigned short r = static_cast<unsigned short>(_mm_movemask_epi8(x));
+            if (RAPIDJSON_UNLIKELY(r != 0)) {   // some of characters is escaped
+                size_t length;
+#ifdef _MSC_VER         // Find the index of first escaped
+                unsigned long offset;
+                _BitScanForward(&offset, r);
+                length = offset;
+#else
+                length = static_cast<size_t>(__builtin_ffs(r) - 1);
+#endif
+                for (const char* pend = p + length; p != pend; )
+                    *q++ = *p++;
+                break;
+            }
+            _mm_storeu_si128(reinterpret_cast<__m128i *>(q), s);
+        }
+
+        is.src_ = p;
+        is.dst_ = q;
+    }
+
+    // When read/write pointers are the same for insitu stream, just skip unescaped characters
+    static RAPIDJSON_FORCEINLINE void SkipUnescapedString(InsituStringStream& is) {
+        RAPIDJSON_ASSERT(is.src_ == is.dst_);
+        char* p = is.src_;
+
+        // Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
+        const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+        for (; p != nextAligned; p++)
+            if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
+                is.src_ = is.dst_ = p;
+                return;
+            }
+
+        // The rest of string using SIMD
+        static const char dquote[16] = { '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"' };
+        static const char bslash[16] = { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' };
+        static const char space[16] = { 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F };
+        const __m128i dq = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&dquote[0]));
+        const __m128i bs = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&bslash[0]));
+        const __m128i sp = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&space[0]));
+
+        for (;; p += 16) {
+            const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
+            const __m128i t1 = _mm_cmpeq_epi8(s, dq);
+            const __m128i t2 = _mm_cmpeq_epi8(s, bs);
+            const __m128i t3 = _mm_cmpeq_epi8(_mm_max_epu8(s, sp), sp); // s < 0x20 <=> max(s, 0x1F) == 0x1F
+            const __m128i x = _mm_or_si128(_mm_or_si128(t1, t2), t3);
+            unsigned short r = static_cast<unsigned short>(_mm_movemask_epi8(x));
+            if (RAPIDJSON_UNLIKELY(r != 0)) {   // some of characters is escaped
+                size_t length;
+#ifdef _MSC_VER         // Find the index of first escaped
+                unsigned long offset;
+                _BitScanForward(&offset, r);
+                length = offset;
+#else
+                length = static_cast<size_t>(__builtin_ffs(r) - 1);
+#endif
+                p += length;
+                break;
+            }
+        }
+
+        is.src_ = is.dst_ = p;
+    }
+#elif defined(RAPIDJSON_NEON)
+    // StringStream -> StackStream<char>
+    static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(StringStream& is, StackStream<char>& os) {
+        const char* p = is.src_;
+
+        // Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
+        const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+        while (p != nextAligned)
+            if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
+                is.src_ = p;
+                return;
+            }
+            else
+                os.Put(*p++);
+
+        // The rest of string using SIMD
+        const uint8x16_t s0 = vmovq_n_u8('"');
+        const uint8x16_t s1 = vmovq_n_u8('\\');
+        const uint8x16_t s2 = vmovq_n_u8('\b');
+        const uint8x16_t s3 = vmovq_n_u8(32);
+
+        for (;; p += 16) {
+            const uint8x16_t s = vld1q_u8(reinterpret_cast<const uint8_t *>(p));
+            uint8x16_t x = vceqq_u8(s, s0);
+            x = vorrq_u8(x, vceqq_u8(s, s1));
+            x = vorrq_u8(x, vceqq_u8(s, s2));
+            x = vorrq_u8(x, vcltq_u8(s, s3));
+
+            x = vrev64q_u8(x);                     // Rev in 64
+            uint64_t low = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 0);   // extract
+            uint64_t high = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 1);  // extract
+
+            SizeType length = 0;
+            bool escaped = false;
+            if (low == 0) {
+                if (high != 0) {
+                    unsigned lz = (unsigned)__builtin_clzll(high);;
+                    length = 8 + (lz >> 3);
+                    escaped = true;
+                }
+            } else {
+                unsigned lz = (unsigned)__builtin_clzll(low);;
+                length = lz >> 3;
+                escaped = true;
+            }
+            if (RAPIDJSON_UNLIKELY(escaped)) {   // some of characters is escaped
+                if (length != 0) {
+                    char* q = reinterpret_cast<char*>(os.Push(length));
+                    for (size_t i = 0; i < length; i++)
+                        q[i] = p[i];
+
+                    p += length;
+                }
+                break;
+            }
+            vst1q_u8(reinterpret_cast<uint8_t *>(os.Push(16)), s);
+        }
+
+        is.src_ = p;
+    }
+
+    // InsituStringStream -> InsituStringStream
+    static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(InsituStringStream& is, InsituStringStream& os) {
+        RAPIDJSON_ASSERT(&is == &os);
+        (void)os;
+
+        if (is.src_ == is.dst_) {
+            SkipUnescapedString(is);
+            return;
+        }
+
+        char* p = is.src_;
+        char *q = is.dst_;
+
+        // Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
+        const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+        while (p != nextAligned)
+            if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
+                is.src_ = p;
+                is.dst_ = q;
+                return;
+            }
+            else
+                *q++ = *p++;
+
+        // The rest of string using SIMD
+        const uint8x16_t s0 = vmovq_n_u8('"');
+        const uint8x16_t s1 = vmovq_n_u8('\\');
+        const uint8x16_t s2 = vmovq_n_u8('\b');
+        const uint8x16_t s3 = vmovq_n_u8(32);
+
+        for (;; p += 16, q += 16) {
+            const uint8x16_t s = vld1q_u8(reinterpret_cast<uint8_t *>(p));
+            uint8x16_t x = vceqq_u8(s, s0);
+            x = vorrq_u8(x, vceqq_u8(s, s1));
+            x = vorrq_u8(x, vceqq_u8(s, s2));
+            x = vorrq_u8(x, vcltq_u8(s, s3));
+
+            x = vrev64q_u8(x);                     // Rev in 64
+            uint64_t low = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 0);   // extract
+            uint64_t high = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 1);  // extract
+
+            SizeType length = 0;
+            bool escaped = false;
+            if (low == 0) {
+                if (high != 0) {
+                    unsigned lz = (unsigned)__builtin_clzll(high);
+                    length = 8 + (lz >> 3);
+                    escaped = true;
+                }
+            } else {
+                unsigned lz = (unsigned)__builtin_clzll(low);
+                length = lz >> 3;
+                escaped = true;
+            }
+            if (RAPIDJSON_UNLIKELY(escaped)) {   // some of characters is escaped
+                for (const char* pend = p + length; p != pend; ) {
+                    *q++ = *p++;
+                }
+                break;
+            }
+            vst1q_u8(reinterpret_cast<uint8_t *>(q), s);
+        }
+
+        is.src_ = p;
+        is.dst_ = q;
+    }
+
+    // When read/write pointers are the same for insitu stream, just skip unescaped characters
+    static RAPIDJSON_FORCEINLINE void SkipUnescapedString(InsituStringStream& is) {
+        RAPIDJSON_ASSERT(is.src_ == is.dst_);
+        char* p = is.src_;
+
+        // Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
+        const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+        for (; p != nextAligned; p++)
+            if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
+                is.src_ = is.dst_ = p;
+                return;
+            }
+
+        // The rest of string using SIMD
+        const uint8x16_t s0 = vmovq_n_u8('"');
+        const uint8x16_t s1 = vmovq_n_u8('\\');
+        const uint8x16_t s2 = vmovq_n_u8('\b');
+        const uint8x16_t s3 = vmovq_n_u8(32);
+
+        for (;; p += 16) {
+            const uint8x16_t s = vld1q_u8(reinterpret_cast<uint8_t *>(p));
+            uint8x16_t x = vceqq_u8(s, s0);
+            x = vorrq_u8(x, vceqq_u8(s, s1));
+            x = vorrq_u8(x, vceqq_u8(s, s2));
+            x = vorrq_u8(x, vcltq_u8(s, s3));
+
+            x = vrev64q_u8(x);                     // Rev in 64
+            uint64_t low = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 0);   // extract
+            uint64_t high = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 1);  // extract
+
+            if (low == 0) {
+                if (high != 0) {
+                    int lz = __builtin_clzll(high);
+                    p += 8 + (lz >> 3);
+                    break;
+                }
+            } else {
+                int lz = __builtin_clzll(low);
+                p += lz >> 3;
+                break;
+            }
+        }
+
+        is.src_ = is.dst_ = p;
+    }
+#endif // RAPIDJSON_NEON
+
+    template<typename InputStream, bool backup, bool pushOnTake>
+    class NumberStream;
+
+    template<typename InputStream>
+    class NumberStream<InputStream, false, false> {
+    public:
+        typedef typename InputStream::Ch Ch;
+
+        NumberStream(GenericReader& reader, InputStream& s) : is(s) { (void)reader;  }
+
+        RAPIDJSON_FORCEINLINE Ch Peek() const { return is.Peek(); }
+        RAPIDJSON_FORCEINLINE Ch TakePush() { return is.Take(); }
+        RAPIDJSON_FORCEINLINE Ch Take() { return is.Take(); }
+		  RAPIDJSON_FORCEINLINE void Push(char) {}
+
+        size_t Tell() { return is.Tell(); }
+        size_t Length() { return 0; }
+        const char* Pop() { return 0; }
+
+    protected:
+        NumberStream& operator=(const NumberStream&);
+
+        InputStream& is;
+    };
+
+    template<typename InputStream>
+    class NumberStream<InputStream, true, false> : public NumberStream<InputStream, false, false> {
+        typedef NumberStream<InputStream, false, false> Base;
+    public:
+        NumberStream(GenericReader& reader, InputStream& is) : Base(reader, is), stackStream(reader.stack_) {}
+
+        RAPIDJSON_FORCEINLINE Ch TakePush() {
+            stackStream.Put(static_cast<char>(Base::is.Peek()));
+            return Base::is.Take();
+        }
+
+        RAPIDJSON_FORCEINLINE void Push(char c) {
+            stackStream.Put(c);
+        }
+
+        size_t Length() { return stackStream.Length(); }
+
+        const char* Pop() {
+            stackStream.Put('\0');
+            return stackStream.Pop();
+        }
+
+    private:
+        StackStream<char> stackStream;
+    };
+
+    template<typename InputStream>
+    class NumberStream<InputStream, true, true> : public NumberStream<InputStream, true, false> {
+        typedef NumberStream<InputStream, true, false> Base;
+    public:
+        NumberStream(GenericReader& reader, InputStream& is) : Base(reader, is) {}
+
+        RAPIDJSON_FORCEINLINE Ch Take() { return Base::TakePush(); }
+    };
+
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseNumber(InputStream& is, Handler& handler) {
+        internal::StreamLocalCopy<InputStream> copy(is);
+        NumberStream<InputStream,
+            ((parseFlags & kParseNumbersAsStringsFlag) != 0) ?
+                ((parseFlags & kParseInsituFlag) == 0) :
+                ((parseFlags & kParseFullPrecisionFlag) != 0),
+            (parseFlags & kParseNumbersAsStringsFlag) != 0 &&
+                (parseFlags & kParseInsituFlag) == 0> s(*this, copy.s);
+
+        size_t startOffset = s.Tell();
+        double d = 0.0;
+        bool useNanOrInf = false;
+
+        // Parse minus
+        bool minus = Consume(s, '-');
+
+        // Parse int: zero / ( digit1-9 *DIGIT )
+        unsigned i = 0;
+        uint64_t i64 = 0;
+        bool use64bit = false;
+        int significandDigit = 0;
+        if (RAPIDJSON_UNLIKELY(s.Peek() == '0')) {
+            i = 0;
+            s.TakePush();
+        }
+        else if (RAPIDJSON_LIKELY(s.Peek() >= '1' && s.Peek() <= '9')) {
+            i = static_cast<unsigned>(s.TakePush() - '0');
+
+            if (minus)
+                while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                    if (RAPIDJSON_UNLIKELY(i >= 214748364)) { // 2^31 = 2147483648
+                        if (RAPIDJSON_LIKELY(i != 214748364 || s.Peek() > '8')) {
+                            i64 = i;
+                            use64bit = true;
+                            break;
+                        }
+                    }
+                    i = i * 10 + static_cast<unsigned>(s.TakePush() - '0');
+                    significandDigit++;
+                }
+            else
+                while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                    if (RAPIDJSON_UNLIKELY(i >= 429496729)) { // 2^32 - 1 = 4294967295
+                        if (RAPIDJSON_LIKELY(i != 429496729 || s.Peek() > '5')) {
+                            i64 = i;
+                            use64bit = true;
+                            break;
+                        }
+                    }
+                    i = i * 10 + static_cast<unsigned>(s.TakePush() - '0');
+                    significandDigit++;
+                }
+        }
+        // Parse NaN or Infinity here
+        else if ((parseFlags & kParseNanAndInfFlag) && RAPIDJSON_LIKELY((s.Peek() == 'I' || s.Peek() == 'N'))) {
+            if (Consume(s, 'N')) {
+                if (Consume(s, 'a') && Consume(s, 'N')) {
+                    d = std::numeric_limits<double>::quiet_NaN();
+                    useNanOrInf = true;
+                }
+            }
+            else if (RAPIDJSON_LIKELY(Consume(s, 'I'))) {
+                if (Consume(s, 'n') && Consume(s, 'f')) {
+                    d = (minus ? -std::numeric_limits<double>::infinity() : std::numeric_limits<double>::infinity());
+                    useNanOrInf = true;
+
+                    if (RAPIDJSON_UNLIKELY(s.Peek() == 'i' && !(Consume(s, 'i') && Consume(s, 'n')
+                                                                && Consume(s, 'i') && Consume(s, 't') && Consume(s, 'y')))) {
+                        RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, s.Tell());
+                    }
+                }
+            }
+            
+            if (RAPIDJSON_UNLIKELY(!useNanOrInf)) {
+                RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, s.Tell());
+            }
+        }
+        else
+            RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, s.Tell());
+
+        // Parse 64bit int
+        bool useDouble = false;
+        if (use64bit) {
+            if (minus)
+                while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                     if (RAPIDJSON_UNLIKELY(i64 >= RAPIDJSON_UINT64_C2(0x0CCCCCCC, 0xCCCCCCCC))) // 2^63 = 9223372036854775808
+                        if (RAPIDJSON_LIKELY(i64 != RAPIDJSON_UINT64_C2(0x0CCCCCCC, 0xCCCCCCCC) || s.Peek() > '8')) {
+                            d = static_cast<double>(i64);
+                            useDouble = true;
+                            break;
+                        }
+                    i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
+                    significandDigit++;
+                }
+            else
+                while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                    if (RAPIDJSON_UNLIKELY(i64 >= RAPIDJSON_UINT64_C2(0x19999999, 0x99999999))) // 2^64 - 1 = 18446744073709551615
+                        if (RAPIDJSON_LIKELY(i64 != RAPIDJSON_UINT64_C2(0x19999999, 0x99999999) || s.Peek() > '5')) {
+                            d = static_cast<double>(i64);
+                            useDouble = true;
+                            break;
+                        }
+                    i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
+                    significandDigit++;
+                }
+        }
+
+        // Force double for big integer
+        if (useDouble) {
+            while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                if (RAPIDJSON_UNLIKELY(d >= 1.7976931348623157e307)) // DBL_MAX / 10.0
+                    RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, startOffset);
+                d = d * 10 + (s.TakePush() - '0');
+            }
+        }
+
+        // Parse frac = decimal-point 1*DIGIT
+        int expFrac = 0;
+        size_t decimalPosition;
+        if (Consume(s, '.')) {
+            decimalPosition = s.Length();
+
+            if (RAPIDJSON_UNLIKELY(!(s.Peek() >= '0' && s.Peek() <= '9')))
+                RAPIDJSON_PARSE_ERROR(kParseErrorNumberMissFraction, s.Tell());
+
+            if (!useDouble) {
+#if RAPIDJSON_64BIT
+                // Use i64 to store significand in 64-bit architecture
+                if (!use64bit)
+                    i64 = i;
+
+                while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                    if (i64 > RAPIDJSON_UINT64_C2(0x1FFFFF, 0xFFFFFFFF)) // 2^53 - 1 for fast path
+                        break;
+                    else {
+                        i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
+                        --expFrac;
+                        if (i64 != 0)
+                            significandDigit++;
+                    }
+                }
+
+                d = static_cast<double>(i64);
+#else
+                // Use double to store significand in 32-bit architecture
+                d = static_cast<double>(use64bit ? i64 : i);
+#endif
+                useDouble = true;
+            }
+
+            while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                if (significandDigit < 17) {
+                    d = d * 10.0 + (s.TakePush() - '0');
+                    --expFrac;
+                    if (RAPIDJSON_LIKELY(d > 0.0))
+                        significandDigit++;
+                }
+                else
+                    s.TakePush();
+            }
+        }
+        else
+            decimalPosition = s.Length(); // decimal position at the end of integer.
+
+        // Parse exp = e [ minus / plus ] 1*DIGIT
+        int exp = 0;
+        if (Consume(s, 'e') || Consume(s, 'E')) {
+            if (!useDouble) {
+                d = static_cast<double>(use64bit ? i64 : i);
+                useDouble = true;
+            }
+
+            bool expMinus = false;
+            if (Consume(s, '+'))
+                ;
+            else if (Consume(s, '-'))
+                expMinus = true;
+
+            if (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                exp = static_cast<int>(s.Take() - '0');
+                if (expMinus) {
+                    while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                        exp = exp * 10 + static_cast<int>(s.Take() - '0');
+                        if (exp >= 214748364) {                         // Issue #313: prevent overflow exponent
+                            while (RAPIDJSON_UNLIKELY(s.Peek() >= '0' && s.Peek() <= '9'))  // Consume the rest of exponent
+                                s.Take();
+                        }
+                    }
+                }
+                else {  // positive exp
+                    int maxExp = 308 - expFrac;
+                    while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+                        exp = exp * 10 + static_cast<int>(s.Take() - '0');
+                        if (RAPIDJSON_UNLIKELY(exp > maxExp))
+                            RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, startOffset);
+                    }
+                }
+            }
+            else
+                RAPIDJSON_PARSE_ERROR(kParseErrorNumberMissExponent, s.Tell());
+
+            if (expMinus)
+                exp = -exp;
+        }
+
+        // Finish parsing, call event according to the type of number.
+        bool cont = true;
+
+        if (parseFlags & kParseNumbersAsStringsFlag) {
+            if (parseFlags & kParseInsituFlag) {
+                s.Pop();  // Pop stack no matter if it will be used or not.
+                typename InputStream::Ch* head = is.PutBegin();
+                const size_t length = s.Tell() - startOffset;
+                RAPIDJSON_ASSERT(length <= 0xFFFFFFFF);
+                // unable to insert the \0 character here, it will erase the comma after this number
+                const typename TargetEncoding::Ch* const str = reinterpret_cast<typename TargetEncoding::Ch*>(head);
+                cont = handler.RawNumber(str, SizeType(length), false);
+            }
+            else {
+                SizeType numCharsToCopy = static_cast<SizeType>(s.Length());
+                StringStream srcStream(s.Pop());
+                StackStream<typename TargetEncoding::Ch> dstStream(stack_);
+                while (numCharsToCopy--) {
+                    Transcoder<UTF8<>, TargetEncoding>::Transcode(srcStream, dstStream);
+                }
+                dstStream.Put('\0');
+                const typename TargetEncoding::Ch* str = dstStream.Pop();
+                const SizeType length = static_cast<SizeType>(dstStream.Length()) - 1;
+                cont = handler.RawNumber(str, SizeType(length), true);
+            }
+        }
+        else {
+           size_t length = s.Length();
+           const char* decimal = s.Pop();  // Pop stack no matter if it will be used or not.
+
+           if (useDouble) {
+               int p = exp + expFrac;
+               if (parseFlags & kParseFullPrecisionFlag)
+                   d = internal::StrtodFullPrecision(d, p, decimal, length, decimalPosition, exp);
+               else
+                   d = internal::StrtodNormalPrecision(d, p);
+
+               cont = handler.Double(minus ? -d : d);
+           }
+           else if (useNanOrInf) {
+               cont = handler.Double(d);
+           }
+           else {
+               if (use64bit) {
+                   if (minus)
+                       cont = handler.Int64(static_cast<int64_t>(~i64 + 1));
+                   else
+                       cont = handler.Uint64(i64);
+               }
+               else {
+                   if (minus)
+                       cont = handler.Int(static_cast<int32_t>(~i + 1));
+                   else
+                       cont = handler.Uint(i);
+               }
+           }
+        }
+        if (RAPIDJSON_UNLIKELY(!cont))
+            RAPIDJSON_PARSE_ERROR(kParseErrorTermination, startOffset);
+    }
+
+    // Parse any JSON value
+    template<unsigned parseFlags, typename InputStream, typename Handler>
+    void ParseValue(InputStream& is, Handler& handler) {
+        switch (is.Peek()) {
+            case 'n': ParseNull  <parseFlags>(is, handler); break;
+            case 't': ParseTrue  <parseFlags>(is, handler); break;
+            case 'f': ParseFalse <parseFlags>(is, handler); break;
+            case '"': ParseString<parseFlags>(is, handler); break;
+            case '{': ParseObject<parseFlags>(is, handler); break;
+            case '[': ParseArray <parseFlags>(is, handler); break;
+            default :
+                      ParseNumber<parseFlags>(is, handler);
+                      break;
+
+        }
+    }
+
+    // Iterative Parsing
+
+    // States
+    enum IterativeParsingState {
+        IterativeParsingFinishState = 0, // sink states at top
+        IterativeParsingErrorState,      // sink states at top
+        IterativeParsingStartState,
+
+        // Object states
+        IterativeParsingObjectInitialState,
+        IterativeParsingMemberKeyState,
+        IterativeParsingMemberValueState,
+        IterativeParsingObjectFinishState,
+
+        // Array states
+        IterativeParsingArrayInitialState,
+        IterativeParsingElementState,
+        IterativeParsingArrayFinishState,
+
+        // Single value state
+        IterativeParsingValueState,
+        
+        // Delimiter states (at bottom)
+        IterativeParsingElementDelimiterState,
+        IterativeParsingMemberDelimiterState,
+        IterativeParsingKeyValueDelimiterState,
+        
+        cIterativeParsingStateCount
+    };
+
+    // Tokens
+    enum Token {
+        LeftBracketToken = 0,
+        RightBracketToken,
+
+        LeftCurlyBracketToken,
+        RightCurlyBracketToken,
+
+        CommaToken,
+        ColonToken,
+
+        StringToken,
+        FalseToken,
+        TrueToken,
+        NullToken,
+        NumberToken,
+
+        kTokenCount
+    };
+
+    RAPIDJSON_FORCEINLINE Token Tokenize(Ch c) {
+
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+#define N NumberToken
+#define N16 N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
+        // Maps from ASCII to Token
+        static const unsigned char tokenMap[256] = {
+            N16, // 00~0F
+            N16, // 10~1F
+            N, N, StringToken, N, N, N, N, N, N, N, N, N, CommaToken, N, N, N, // 20~2F
+            N, N, N, N, N, N, N, N, N, N, ColonToken, N, N, N, N, N, // 30~3F
+            N16, // 40~4F
+            N, N, N, N, N, N, N, N, N, N, N, LeftBracketToken, N, RightBracketToken, N, N, // 50~5F
+            N, N, N, N, N, N, FalseToken, N, N, N, N, N, N, N, NullToken, N, // 60~6F
+            N, N, N, N, TrueToken, N, N, N, N, N, N, LeftCurlyBracketToken, N, RightCurlyBracketToken, N, N, // 70~7F
+            N16, N16, N16, N16, N16, N16, N16, N16 // 80~FF
+        };
+#undef N
+#undef N16
+//!@endcond
+
+        if (sizeof(Ch) == 1 || static_cast<unsigned>(c) < 256)
+            return static_cast<Token>(tokenMap[static_cast<unsigned char>(c)]);
+        else
+            return NumberToken;
+    }
+
+    RAPIDJSON_FORCEINLINE IterativeParsingState Predict(IterativeParsingState state, Token token) {
+        // current state x one lookahead token -> new state
+        static const char G[cIterativeParsingStateCount][kTokenCount] = {
+            // Finish(sink state)
+            {
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState
+            },
+            // Error(sink state)
+            {
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState
+            },
+            // Start
+            {
+                IterativeParsingArrayInitialState,  // Left bracket
+                IterativeParsingErrorState,         // Right bracket
+                IterativeParsingObjectInitialState, // Left curly bracket
+                IterativeParsingErrorState,         // Right curly bracket
+                IterativeParsingErrorState,         // Comma
+                IterativeParsingErrorState,         // Colon
+                IterativeParsingValueState,         // String
+                IterativeParsingValueState,         // False
+                IterativeParsingValueState,         // True
+                IterativeParsingValueState,         // Null
+                IterativeParsingValueState          // Number
+            },
+            // ObjectInitial
+            {
+                IterativeParsingErrorState,         // Left bracket
+                IterativeParsingErrorState,         // Right bracket
+                IterativeParsingErrorState,         // Left curly bracket
+                IterativeParsingObjectFinishState,  // Right curly bracket
+                IterativeParsingErrorState,         // Comma
+                IterativeParsingErrorState,         // Colon
+                IterativeParsingMemberKeyState,     // String
+                IterativeParsingErrorState,         // False
+                IterativeParsingErrorState,         // True
+                IterativeParsingErrorState,         // Null
+                IterativeParsingErrorState          // Number
+            },
+            // MemberKey
+            {
+                IterativeParsingErrorState,             // Left bracket
+                IterativeParsingErrorState,             // Right bracket
+                IterativeParsingErrorState,             // Left curly bracket
+                IterativeParsingErrorState,             // Right curly bracket
+                IterativeParsingErrorState,             // Comma
+                IterativeParsingKeyValueDelimiterState, // Colon
+                IterativeParsingErrorState,             // String
+                IterativeParsingErrorState,             // False
+                IterativeParsingErrorState,             // True
+                IterativeParsingErrorState,             // Null
+                IterativeParsingErrorState              // Number
+            },
+            // MemberValue
+            {
+                IterativeParsingErrorState,             // Left bracket
+                IterativeParsingErrorState,             // Right bracket
+                IterativeParsingErrorState,             // Left curly bracket
+                IterativeParsingObjectFinishState,      // Right curly bracket
+                IterativeParsingMemberDelimiterState,   // Comma
+                IterativeParsingErrorState,             // Colon
+                IterativeParsingErrorState,             // String
+                IterativeParsingErrorState,             // False
+                IterativeParsingErrorState,             // True
+                IterativeParsingErrorState,             // Null
+                IterativeParsingErrorState              // Number
+            },
+            // ObjectFinish(sink state)
+            {
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState
+            },
+            // ArrayInitial
+            {
+                IterativeParsingArrayInitialState,      // Left bracket(push Element state)
+                IterativeParsingArrayFinishState,       // Right bracket
+                IterativeParsingObjectInitialState,     // Left curly bracket(push Element state)
+                IterativeParsingErrorState,             // Right curly bracket
+                IterativeParsingErrorState,             // Comma
+                IterativeParsingErrorState,             // Colon
+                IterativeParsingElementState,           // String
+                IterativeParsingElementState,           // False
+                IterativeParsingElementState,           // True
+                IterativeParsingElementState,           // Null
+                IterativeParsingElementState            // Number
+            },
+            // Element
+            {
+                IterativeParsingErrorState,             // Left bracket
+                IterativeParsingArrayFinishState,       // Right bracket
+                IterativeParsingErrorState,             // Left curly bracket
+                IterativeParsingErrorState,             // Right curly bracket
+                IterativeParsingElementDelimiterState,  // Comma
+                IterativeParsingErrorState,             // Colon
+                IterativeParsingErrorState,             // String
+                IterativeParsingErrorState,             // False
+                IterativeParsingErrorState,             // True
+                IterativeParsingErrorState,             // Null
+                IterativeParsingErrorState              // Number
+            },
+            // ArrayFinish(sink state)
+            {
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState
+            },
+            // Single Value (sink state)
+            {
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
+                IterativeParsingErrorState
+            },
+            // ElementDelimiter
+            {
+                IterativeParsingArrayInitialState,      // Left bracket(push Element state)
+                IterativeParsingArrayFinishState,       // Right bracket
+                IterativeParsingObjectInitialState,     // Left curly bracket(push Element state)
+                IterativeParsingErrorState,             // Right curly bracket
+                IterativeParsingErrorState,             // Comma
+                IterativeParsingErrorState,             // Colon
+                IterativeParsingElementState,           // String
+                IterativeParsingElementState,           // False
+                IterativeParsingElementState,           // True
+                IterativeParsingElementState,           // Null
+                IterativeParsingElementState            // Number
+            },
+            // MemberDelimiter
+            {
+                IterativeParsingErrorState,         // Left bracket
+                IterativeParsingErrorState,         // Right bracket
+                IterativeParsingErrorState,         // Left curly bracket
+                IterativeParsingObjectFinishState,  // Right curly bracket
+                IterativeParsingErrorState,         // Comma
+                IterativeParsingErrorState,         // Colon
+                IterativeParsingMemberKeyState,     // String
+                IterativeParsingErrorState,         // False
+                IterativeParsingErrorState,         // True
+                IterativeParsingErrorState,         // Null
+                IterativeParsingErrorState          // Number
+            },
+            // KeyValueDelimiter
+            {
+                IterativeParsingArrayInitialState,      // Left bracket(push MemberValue state)
+                IterativeParsingErrorState,             // Right bracket
+                IterativeParsingObjectInitialState,     // Left curly bracket(push MemberValue state)
+                IterativeParsingErrorState,             // Right curly bracket
+                IterativeParsingErrorState,             // Comma
+                IterativeParsingErrorState,             // Colon
+                IterativeParsingMemberValueState,       // String
+                IterativeParsingMemberValueState,       // False
+                IterativeParsingMemberValueState,       // True
+                IterativeParsingMemberValueState,       // Null
+                IterativeParsingMemberValueState        // Number
+            },
+        }; // End of G
+
+        return static_cast<IterativeParsingState>(G[state][token]);
+    }
+
+    // Make an advance in the token stream and state based on the candidate destination state which was returned by Transit().
+    // May return a new state on state pop.
+    template <unsigned parseFlags, typename InputStream, typename Handler>
+    RAPIDJSON_FORCEINLINE IterativeParsingState Transit(IterativeParsingState src, Token token, IterativeParsingState dst, InputStream& is, Handler& handler) {
+        (void)token;
+
+        switch (dst) {
+        case IterativeParsingErrorState:
+            return dst;
+
+        case IterativeParsingObjectInitialState:
+        case IterativeParsingArrayInitialState:
+        {
+            // Push the state(Element or MemeberValue) if we are nested in another array or value of member.
+            // In this way we can get the correct state on ObjectFinish or ArrayFinish by frame pop.
+            IterativeParsingState n = src;
+            if (src == IterativeParsingArrayInitialState || src == IterativeParsingElementDelimiterState)
+                n = IterativeParsingElementState;
+            else if (src == IterativeParsingKeyValueDelimiterState)
+                n = IterativeParsingMemberValueState;
+            // Push current state.
+            *stack_.template Push<SizeType>(1) = n;
+            // Initialize and push the member/element count.
+            *stack_.template Push<SizeType>(1) = 0;
+            // Call handler
+            bool hr = (dst == IterativeParsingObjectInitialState) ? handler.StartObject() : handler.StartArray();
+            // On handler short circuits the parsing.
+            if (!hr) {
+                RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorTermination, is.Tell());
+                return IterativeParsingErrorState;
+            }
+            else {
+                is.Take();
+                return dst;
+            }
+        }
+
+        case IterativeParsingMemberKeyState:
+            ParseString<parseFlags>(is, handler, true);
+            if (HasParseError())
+                return IterativeParsingErrorState;
+            else
+                return dst;
+
+        case IterativeParsingKeyValueDelimiterState:
+            RAPIDJSON_ASSERT(token == ColonToken);
+            is.Take();
+            return dst;
+
+        case IterativeParsingMemberValueState:
+            // Must be non-compound value. Or it would be ObjectInitial or ArrayInitial state.
+            ParseValue<parseFlags>(is, handler);
+            if (HasParseError()) {
+                return IterativeParsingErrorState;
+            }
+            return dst;
+
+        case IterativeParsingElementState:
+            // Must be non-compound value. Or it would be ObjectInitial or ArrayInitial state.
+            ParseValue<parseFlags>(is, handler);
+            if (HasParseError()) {
+                return IterativeParsingErrorState;
+            }
+            return dst;
+
+        case IterativeParsingMemberDelimiterState:
+        case IterativeParsingElementDelimiterState:
+            is.Take();
+            // Update member/element count.
+            *stack_.template Top<SizeType>() = *stack_.template Top<SizeType>() + 1;
+            return dst;
+
+        case IterativeParsingObjectFinishState:
+        {
+            // Transit from delimiter is only allowed when trailing commas are enabled
+            if (!(parseFlags & kParseTrailingCommasFlag) && src == IterativeParsingMemberDelimiterState) {
+                RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorObjectMissName, is.Tell());
+                return IterativeParsingErrorState;
+            }
+            // Get member count.
+            SizeType c = *stack_.template Pop<SizeType>(1);
+            // If the object is not empty, count the last member.
+            if (src == IterativeParsingMemberValueState)
+                ++c;
+            // Restore the state.
+            IterativeParsingState n = static_cast<IterativeParsingState>(*stack_.template Pop<SizeType>(1));
+            // Transit to Finish state if this is the topmost scope.
+            if (n == IterativeParsingStartState)
+                n = IterativeParsingFinishState;
+            // Call handler
+            bool hr = handler.EndObject(c);
+            // On handler short circuits the parsing.
+            if (!hr) {
+                RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorTermination, is.Tell());
+                return IterativeParsingErrorState;
+            }
+            else {
+                is.Take();
+                return n;
+            }
+        }
+
+        case IterativeParsingArrayFinishState:
+        {
+            // Transit from delimiter is only allowed when trailing commas are enabled
+            if (!(parseFlags & kParseTrailingCommasFlag) && src == IterativeParsingElementDelimiterState) {
+                RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorValueInvalid, is.Tell());
+                return IterativeParsingErrorState;
+            }
+            // Get element count.
+            SizeType c = *stack_.template Pop<SizeType>(1);
+            // If the array is not empty, count the last element.
+            if (src == IterativeParsingElementState)
+                ++c;
+            // Restore the state.
+            IterativeParsingState n = static_cast<IterativeParsingState>(*stack_.template Pop<SizeType>(1));
+            // Transit to Finish state if this is the topmost scope.
+            if (n == IterativeParsingStartState)
+                n = IterativeParsingFinishState;
+            // Call handler
+            bool hr = handler.EndArray(c);
+            // On handler short circuits the parsing.
+            if (!hr) {
+                RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorTermination, is.Tell());
+                return IterativeParsingErrorState;
+            }
+            else {
+                is.Take();
+                return n;
+            }
+        }
+
+        default:
+            // This branch is for IterativeParsingValueState actually.
+            // Use `default:` rather than
+            // `case IterativeParsingValueState:` is for code coverage.
+
+            // The IterativeParsingStartState is not enumerated in this switch-case.
+            // It is impossible for that case. And it can be caught by following assertion.
+
+            // The IterativeParsingFinishState is not enumerated in this switch-case either.
+            // It is a "derivative" state which cannot triggered from Predict() directly.
+            // Therefore it cannot happen here. And it can be caught by following assertion.
+            RAPIDJSON_ASSERT(dst == IterativeParsingValueState);
+
+            // Must be non-compound value. Or it would be ObjectInitial or ArrayInitial state.
+            ParseValue<parseFlags>(is, handler);
+            if (HasParseError()) {
+                return IterativeParsingErrorState;
+            }
+            return IterativeParsingFinishState;
+        }
+    }
+
+    template <typename InputStream>
+    void HandleError(IterativeParsingState src, InputStream& is) {
+        if (HasParseError()) {
+            // Error flag has been set.
+            return;
+        }
+
+        switch (src) {
+        case IterativeParsingStartState:            RAPIDJSON_PARSE_ERROR(kParseErrorDocumentEmpty, is.Tell()); return;
+        case IterativeParsingFinishState:           RAPIDJSON_PARSE_ERROR(kParseErrorDocumentRootNotSingular, is.Tell()); return;
+        case IterativeParsingObjectInitialState:
+        case IterativeParsingMemberDelimiterState:  RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissName, is.Tell()); return;
+        case IterativeParsingMemberKeyState:        RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissColon, is.Tell()); return;
+        case IterativeParsingMemberValueState:      RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissCommaOrCurlyBracket, is.Tell()); return;
+        case IterativeParsingKeyValueDelimiterState:
+        case IterativeParsingArrayInitialState:
+        case IterativeParsingElementDelimiterState: RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell()); return;
+        default: RAPIDJSON_ASSERT(src == IterativeParsingElementState); RAPIDJSON_PARSE_ERROR(kParseErrorArrayMissCommaOrSquareBracket, is.Tell()); return;
+        }
+    }
+
+    RAPIDJSON_FORCEINLINE bool IsIterativeParsingDelimiterState(IterativeParsingState s) {
+        return s >= IterativeParsingElementDelimiterState;
+    }
+    
+    RAPIDJSON_FORCEINLINE bool IsIterativeParsingCompleteState(IterativeParsingState s) {
+        return s <= IterativeParsingErrorState;
+    }
+    
+    template <unsigned parseFlags, typename InputStream, typename Handler>
+    ParseResult IterativeParse(InputStream& is, Handler& handler) {
+        parseResult_.Clear();
+        ClearStackOnExit scope(*this);
+        IterativeParsingState state = IterativeParsingStartState;
+        
+        SkipWhitespaceAndComments<parseFlags>(is);
+        RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
+        while (is.Peek() != '\0') {
+            Token t = Tokenize(is.Peek());
+            IterativeParsingState n = Predict(state, t);
+            IterativeParsingState d = Transit<parseFlags>(state, t, n, is, handler);
+            
+            if (d == IterativeParsingErrorState) {
+                HandleError(state, is);
+                break;
+            }
+            
+            state = d;
+            
+            // Do not further consume streams if a root JSON has been parsed.
+            if ((parseFlags & kParseStopWhenDoneFlag) && state == IterativeParsingFinishState)
+                break;
+            
+            SkipWhitespaceAndComments<parseFlags>(is);
+            RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
+        }
+        
+        // Handle the end of file.
+        if (state != IterativeParsingFinishState)
+            HandleError(state, is);
+        
+        return parseResult_;
+    }
+
+    static const size_t kDefaultStackCapacity = 256;    //!< Default stack capacity in bytes for storing a single decoded string.
+    internal::Stack<StackAllocator> stack_;  //!< A stack for storing decoded string temporarily during non-destructive parsing.
+    ParseResult parseResult_;
+    IterativeParsingState state_;
+}; // class GenericReader
+
+//! Reader with UTF8 encoding and default allocator.
+typedef GenericReader<UTF8<>, UTF8<> > Reader;
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_READER_H_
diff --git a/external/rapidjson/schema.h b/external/rapidjson/schema.h
new file mode 100644
index 0000000..2713fb2
--- /dev/null
+++ b/external/rapidjson/schema.h
@@ -0,0 +1,2017 @@
+// Tencent is pleased to support the open source community by making RapidJSON available->
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip-> All rights reserved->
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License-> You may obtain a copy of the License at
+//
+// http://opensource->org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied-> See the License for the 
+// specific language governing permissions and limitations under the License->
+
+#ifndef RAPIDJSON_SCHEMA_H_
+#define RAPIDJSON_SCHEMA_H_
+
+#include "document.h"
+#include "pointer.h"
+#include <cmath> // abs, floor
+
+#if !defined(RAPIDJSON_SCHEMA_USE_INTERNALREGEX)
+#define RAPIDJSON_SCHEMA_USE_INTERNALREGEX 1
+#else
+#define RAPIDJSON_SCHEMA_USE_INTERNALREGEX 0
+#endif
+
+#if !RAPIDJSON_SCHEMA_USE_INTERNALREGEX && !defined(RAPIDJSON_SCHEMA_USE_STDREGEX) && (__cplusplus >=201103L || (defined(_MSC_VER) && _MSC_VER >= 1800))
+#define RAPIDJSON_SCHEMA_USE_STDREGEX 1
+#else
+#define RAPIDJSON_SCHEMA_USE_STDREGEX 0
+#endif
+
+#if RAPIDJSON_SCHEMA_USE_INTERNALREGEX
+#include "internal/regex.h"
+#elif RAPIDJSON_SCHEMA_USE_STDREGEX
+#include <regex>
+#endif
+
+#if RAPIDJSON_SCHEMA_USE_INTERNALREGEX || RAPIDJSON_SCHEMA_USE_STDREGEX
+#define RAPIDJSON_SCHEMA_HAS_REGEX 1
+#else
+#define RAPIDJSON_SCHEMA_HAS_REGEX 0
+#endif
+
+#ifndef RAPIDJSON_SCHEMA_VERBOSE
+#define RAPIDJSON_SCHEMA_VERBOSE 0
+#endif
+
+#if RAPIDJSON_SCHEMA_VERBOSE
+#include "stringbuffer.h"
+#endif
+
+RAPIDJSON_DIAG_PUSH
+
+#if defined(__GNUC__)
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_OFF(weak-vtables)
+RAPIDJSON_DIAG_OFF(exit-time-destructors)
+RAPIDJSON_DIAG_OFF(c++98-compat-pedantic)
+RAPIDJSON_DIAG_OFF(variadic-macros)
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_OFF(4512) // assignment operator could not be generated
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+// Verbose Utilities
+
+#if RAPIDJSON_SCHEMA_VERBOSE
+
+namespace internal {
+
+inline void PrintInvalidKeyword(const char* keyword) {
+    printf("Fail keyword: %s\n", keyword);
+}
+
+inline void PrintInvalidKeyword(const wchar_t* keyword) {
+    wprintf(L"Fail keyword: %ls\n", keyword);
+}
+
+inline void PrintInvalidDocument(const char* document) {
+    printf("Fail document: %s\n\n", document);
+}
+
+inline void PrintInvalidDocument(const wchar_t* document) {
+    wprintf(L"Fail document: %ls\n\n", document);
+}
+
+inline void PrintValidatorPointers(unsigned depth, const char* s, const char* d) {
+    printf("S: %*s%s\nD: %*s%s\n\n", depth * 4, " ", s, depth * 4, " ", d);
+}
+
+inline void PrintValidatorPointers(unsigned depth, const wchar_t* s, const wchar_t* d) {
+    wprintf(L"S: %*ls%ls\nD: %*ls%ls\n\n", depth * 4, L" ", s, depth * 4, L" ", d);
+}
+
+} // namespace internal
+
+#endif // RAPIDJSON_SCHEMA_VERBOSE
+
+///////////////////////////////////////////////////////////////////////////////
+// RAPIDJSON_INVALID_KEYWORD_RETURN
+
+#if RAPIDJSON_SCHEMA_VERBOSE
+#define RAPIDJSON_INVALID_KEYWORD_VERBOSE(keyword) internal::PrintInvalidKeyword(keyword)
+#else
+#define RAPIDJSON_INVALID_KEYWORD_VERBOSE(keyword)
+#endif
+
+#define RAPIDJSON_INVALID_KEYWORD_RETURN(keyword)\
+RAPIDJSON_MULTILINEMACRO_BEGIN\
+    context.invalidKeyword = keyword.GetString();\
+    RAPIDJSON_INVALID_KEYWORD_VERBOSE(keyword.GetString());\
+    return false;\
+RAPIDJSON_MULTILINEMACRO_END
+
+///////////////////////////////////////////////////////////////////////////////
+// Forward declarations
+
+template <typename ValueType, typename Allocator>
+class GenericSchemaDocument;
+
+namespace internal {
+
+template <typename SchemaDocumentType>
+class Schema;
+
+///////////////////////////////////////////////////////////////////////////////
+// ISchemaValidator
+
+class ISchemaValidator {
+public:
+    virtual ~ISchemaValidator() {}
+    virtual bool IsValid() const = 0;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// ISchemaStateFactory
+
+template <typename SchemaType>
+class ISchemaStateFactory {
+public:
+    virtual ~ISchemaStateFactory() {}
+    virtual ISchemaValidator* CreateSchemaValidator(const SchemaType&) = 0;
+    virtual void DestroySchemaValidator(ISchemaValidator* validator) = 0;
+    virtual void* CreateHasher() = 0;
+    virtual uint64_t GetHashCode(void* hasher) = 0;
+    virtual void DestroryHasher(void* hasher) = 0;
+    virtual void* MallocState(size_t size) = 0;
+    virtual void FreeState(void* p) = 0;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Hasher
+
+// For comparison of compound value
+template<typename Encoding, typename Allocator>
+class Hasher {
+public:
+    typedef typename Encoding::Ch Ch;
+
+    Hasher(Allocator* allocator = 0, size_t stackCapacity = kDefaultSize) : stack_(allocator, stackCapacity) {}
+
+    bool Null() { return WriteType(kNullType); }
+    bool Bool(bool b) { return WriteType(b ? kTrueType : kFalseType); }
+    bool Int(int i) { Number n; n.u.i = i; n.d = static_cast<double>(i); return WriteNumber(n); }
+    bool Uint(unsigned u) { Number n; n.u.u = u; n.d = static_cast<double>(u); return WriteNumber(n); }
+    bool Int64(int64_t i) { Number n; n.u.i = i; n.d = static_cast<double>(i); return WriteNumber(n); }
+    bool Uint64(uint64_t u) { Number n; n.u.u = u; n.d = static_cast<double>(u); return WriteNumber(n); }
+    bool Double(double d) { 
+        Number n; 
+        if (d < 0) n.u.i = static_cast<int64_t>(d);
+        else       n.u.u = static_cast<uint64_t>(d); 
+        n.d = d;
+        return WriteNumber(n);
+    }
+
+    bool RawNumber(const Ch* str, SizeType len, bool) {
+        WriteBuffer(kNumberType, str, len * sizeof(Ch));
+        return true;
+    }
+
+    bool String(const Ch* str, SizeType len, bool) {
+        WriteBuffer(kStringType, str, len * sizeof(Ch));
+        return true;
+    }
+
+    bool StartObject() { return true; }
+    bool Key(const Ch* str, SizeType len, bool copy) { return String(str, len, copy); }
+    bool EndObject(SizeType memberCount) { 
+        uint64_t h = Hash(0, kObjectType);
+        uint64_t* kv = stack_.template Pop<uint64_t>(memberCount * 2);
+        for (SizeType i = 0; i < memberCount; i++)
+            h ^= Hash(kv[i * 2], kv[i * 2 + 1]);  // Use xor to achieve member order insensitive
+        *stack_.template Push<uint64_t>() = h;
+        return true;
+    }
+    
+    bool StartArray() { return true; }
+    bool EndArray(SizeType elementCount) { 
+        uint64_t h = Hash(0, kArrayType);
+        uint64_t* e = stack_.template Pop<uint64_t>(elementCount);
+        for (SizeType i = 0; i < elementCount; i++)
+            h = Hash(h, e[i]); // Use hash to achieve element order sensitive
+        *stack_.template Push<uint64_t>() = h;
+        return true;
+    }
+
+    bool IsValid() const { return stack_.GetSize() == sizeof(uint64_t); }
+
+    uint64_t GetHashCode() const {
+        RAPIDJSON_ASSERT(IsValid());
+        return *stack_.template Top<uint64_t>();
+    }
+
+private:
+    static const size_t kDefaultSize = 256;
+    struct Number {
+        union U {
+            uint64_t u;
+            int64_t i;
+        }u;
+        double d;
+    };
+
+    bool WriteType(Type type) { return WriteBuffer(type, 0, 0); }
+    
+    bool WriteNumber(const Number& n) { return WriteBuffer(kNumberType, &n, sizeof(n)); }
+    
+    bool WriteBuffer(Type type, const void* data, size_t len) {
+        // FNV-1a from http://isthe.com/chongo/tech/comp/fnv/
+        uint64_t h = Hash(RAPIDJSON_UINT64_C2(0x84222325, 0xcbf29ce4), type);
+        const unsigned char* d = static_cast<const unsigned char*>(data);
+        for (size_t i = 0; i < len; i++)
+            h = Hash(h, d[i]);
+        *stack_.template Push<uint64_t>() = h;
+        return true;
+    }
+
+    static uint64_t Hash(uint64_t h, uint64_t d) {
+        static const uint64_t kPrime = RAPIDJSON_UINT64_C2(0x00000100, 0x000001b3);
+        h ^= d;
+        h *= kPrime;
+        return h;
+    }
+
+    Stack<Allocator> stack_;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// SchemaValidationContext
+
+template <typename SchemaDocumentType>
+struct SchemaValidationContext {
+    typedef Schema<SchemaDocumentType> SchemaType;
+    typedef ISchemaStateFactory<SchemaType> SchemaValidatorFactoryType;
+    typedef typename SchemaType::ValueType ValueType;
+    typedef typename ValueType::Ch Ch;
+
+    enum PatternValidatorType {
+        kPatternValidatorOnly,
+        kPatternValidatorWithProperty,
+        kPatternValidatorWithAdditionalProperty
+    };
+
+    SchemaValidationContext(SchemaValidatorFactoryType& f, const SchemaType* s) :
+        factory(f),
+        schema(s),
+        valueSchema(),
+        invalidKeyword(),
+        hasher(),
+        arrayElementHashCodes(),
+        validators(),
+        validatorCount(),
+        patternPropertiesValidators(),
+        patternPropertiesValidatorCount(),
+        patternPropertiesSchemas(),
+        patternPropertiesSchemaCount(),
+        valuePatternValidatorType(kPatternValidatorOnly),
+        propertyExist(),
+        inArray(false),
+        valueUniqueness(false),
+        arrayUniqueness(false)
+    {
+    }
+
+    ~SchemaValidationContext() {
+        if (hasher)
+            factory.DestroryHasher(hasher);
+        if (validators) {
+            for (SizeType i = 0; i < validatorCount; i++)
+                factory.DestroySchemaValidator(validators[i]);
+            factory.FreeState(validators);
+        }
+        if (patternPropertiesValidators) {
+            for (SizeType i = 0; i < patternPropertiesValidatorCount; i++)
+                factory.DestroySchemaValidator(patternPropertiesValidators[i]);
+            factory.FreeState(patternPropertiesValidators);
+        }
+        if (patternPropertiesSchemas)
+            factory.FreeState(patternPropertiesSchemas);
+        if (propertyExist)
+            factory.FreeState(propertyExist);
+    }
+
+    SchemaValidatorFactoryType& factory;
+    const SchemaType* schema;
+    const SchemaType* valueSchema;
+    const Ch* invalidKeyword;
+    void* hasher; // Only validator access
+    void* arrayElementHashCodes; // Only validator access this
+    ISchemaValidator** validators;
+    SizeType validatorCount;
+    ISchemaValidator** patternPropertiesValidators;
+    SizeType patternPropertiesValidatorCount;
+    const SchemaType** patternPropertiesSchemas;
+    SizeType patternPropertiesSchemaCount;
+    PatternValidatorType valuePatternValidatorType;
+    PatternValidatorType objectPatternValidatorType;
+    SizeType arrayElementIndex;
+    bool* propertyExist;
+    bool inArray;
+    bool valueUniqueness;
+    bool arrayUniqueness;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Schema
+
+template <typename SchemaDocumentType>
+class Schema {
+public:
+    typedef typename SchemaDocumentType::ValueType ValueType;
+    typedef typename SchemaDocumentType::AllocatorType AllocatorType;
+    typedef typename SchemaDocumentType::PointerType PointerType;
+    typedef typename ValueType::EncodingType EncodingType;
+    typedef typename EncodingType::Ch Ch;
+    typedef SchemaValidationContext<SchemaDocumentType> Context;
+    typedef Schema<SchemaDocumentType> SchemaType;
+    typedef GenericValue<EncodingType, AllocatorType> SValue;
+    friend class GenericSchemaDocument<ValueType, AllocatorType>;
+
+    Schema(SchemaDocumentType* schemaDocument, const PointerType& p, const ValueType& value, const ValueType& document, AllocatorType* allocator) :
+        allocator_(allocator),
+        typeless_(schemaDocument->GetTypeless()),
+        enum_(),
+        enumCount_(),
+        not_(),
+        type_((1 << kTotalSchemaType) - 1), // typeless
+        validatorCount_(),
+        notValidatorIndex_(),
+        properties_(),
+        additionalPropertiesSchema_(),
+        patternProperties_(),
+        patternPropertyCount_(),
+        propertyCount_(),
+        minProperties_(),
+        maxProperties_(SizeType(~0)),
+        additionalProperties_(true),
+        hasDependencies_(),
+        hasRequired_(),
+        hasSchemaDependencies_(),
+        additionalItemsSchema_(),
+        itemsList_(),
+        itemsTuple_(),
+        itemsTupleCount_(),
+        minItems_(),
+        maxItems_(SizeType(~0)),
+        additionalItems_(true),
+        uniqueItems_(false),
+        pattern_(),
+        minLength_(0),
+        maxLength_(~SizeType(0)),
+        exclusiveMinimum_(false),
+        exclusiveMaximum_(false)
+    {
+        typedef typename SchemaDocumentType::ValueType ValueType;
+        typedef typename ValueType::ConstValueIterator ConstValueIterator;
+        typedef typename ValueType::ConstMemberIterator ConstMemberIterator;
+
+        if (!value.IsObject())
+            return;
+
+        if (const ValueType* v = GetMember(value, GetTypeString())) {
+            type_ = 0;
+            if (v->IsString())
+                AddType(*v);
+            else if (v->IsArray())
+                for (ConstValueIterator itr = v->Begin(); itr != v->End(); ++itr)
+                    AddType(*itr);
+        }
+
+        if (const ValueType* v = GetMember(value, GetEnumString()))
+            if (v->IsArray() && v->Size() > 0) {
+                enum_ = static_cast<uint64_t*>(allocator_->Malloc(sizeof(uint64_t) * v->Size()));
+                for (ConstValueIterator itr = v->Begin(); itr != v->End(); ++itr) {
+                    typedef Hasher<EncodingType, MemoryPoolAllocator<> > EnumHasherType;
+                    char buffer[256 + 24];
+                    MemoryPoolAllocator<> hasherAllocator(buffer, sizeof(buffer));
+                    EnumHasherType h(&hasherAllocator, 256);
+                    itr->Accept(h);
+                    enum_[enumCount_++] = h.GetHashCode();
+                }
+            }
+
+        if (schemaDocument) {
+            AssignIfExist(allOf_, *schemaDocument, p, value, GetAllOfString(), document);
+            AssignIfExist(anyOf_, *schemaDocument, p, value, GetAnyOfString(), document);
+            AssignIfExist(oneOf_, *schemaDocument, p, value, GetOneOfString(), document);
+        }
+
+        if (const ValueType* v = GetMember(value, GetNotString())) {
+            schemaDocument->CreateSchema(&not_, p.Append(GetNotString(), allocator_), *v, document);
+            notValidatorIndex_ = validatorCount_;
+            validatorCount_++;
+        }
+
+        // Object
+
+        const ValueType* properties = GetMember(value, GetPropertiesString());
+        const ValueType* required = GetMember(value, GetRequiredString());
+        const ValueType* dependencies = GetMember(value, GetDependenciesString());
+        {
+            // Gather properties from properties/required/dependencies
+            SValue allProperties(kArrayType);
+
+            if (properties && properties->IsObject())
+                for (ConstMemberIterator itr = properties->MemberBegin(); itr != properties->MemberEnd(); ++itr)
+                    AddUniqueElement(allProperties, itr->name);
+            
+            if (required && required->IsArray())
+                for (ConstValueIterator itr = required->Begin(); itr != required->End(); ++itr)
+                    if (itr->IsString())
+                        AddUniqueElement(allProperties, *itr);
+
+            if (dependencies && dependencies->IsObject())
+                for (ConstMemberIterator itr = dependencies->MemberBegin(); itr != dependencies->MemberEnd(); ++itr) {
+                    AddUniqueElement(allProperties, itr->name);
+                    if (itr->value.IsArray())
+                        for (ConstValueIterator i = itr->value.Begin(); i != itr->value.End(); ++i)
+                            if (i->IsString())
+                                AddUniqueElement(allProperties, *i);
+                }
+
+            if (allProperties.Size() > 0) {
+                propertyCount_ = allProperties.Size();
+                properties_ = static_cast<Property*>(allocator_->Malloc(sizeof(Property) * propertyCount_));
+                for (SizeType i = 0; i < propertyCount_; i++) {
+                    new (&properties_[i]) Property();
+                    properties_[i].name = allProperties[i];
+                    properties_[i].schema = typeless_;
+                }
+            }
+        }
+
+        if (properties && properties->IsObject()) {
+            PointerType q = p.Append(GetPropertiesString(), allocator_);
+            for (ConstMemberIterator itr = properties->MemberBegin(); itr != properties->MemberEnd(); ++itr) {
+                SizeType index;
+                if (FindPropertyIndex(itr->name, &index))
+                    schemaDocument->CreateSchema(&properties_[index].schema, q.Append(itr->name, allocator_), itr->value, document);
+            }
+        }
+
+        if (const ValueType* v = GetMember(value, GetPatternPropertiesString())) {
+            PointerType q = p.Append(GetPatternPropertiesString(), allocator_);
+            patternProperties_ = static_cast<PatternProperty*>(allocator_->Malloc(sizeof(PatternProperty) * v->MemberCount()));
+            patternPropertyCount_ = 0;
+
+            for (ConstMemberIterator itr = v->MemberBegin(); itr != v->MemberEnd(); ++itr) {
+                new (&patternProperties_[patternPropertyCount_]) PatternProperty();
+                patternProperties_[patternPropertyCount_].pattern = CreatePattern(itr->name);
+                schemaDocument->CreateSchema(&patternProperties_[patternPropertyCount_].schema, q.Append(itr->name, allocator_), itr->value, document);
+                patternPropertyCount_++;
+            }
+        }
+
+        if (required && required->IsArray())
+            for (ConstValueIterator itr = required->Begin(); itr != required->End(); ++itr)
+                if (itr->IsString()) {
+                    SizeType index;
+                    if (FindPropertyIndex(*itr, &index)) {
+                        properties_[index].required = true;
+                        hasRequired_ = true;
+                    }
+                }
+
+        if (dependencies && dependencies->IsObject()) {
+            PointerType q = p.Append(GetDependenciesString(), allocator_);
+            hasDependencies_ = true;
+            for (ConstMemberIterator itr = dependencies->MemberBegin(); itr != dependencies->MemberEnd(); ++itr) {
+                SizeType sourceIndex;
+                if (FindPropertyIndex(itr->name, &sourceIndex)) {
+                    if (itr->value.IsArray()) {
+                        properties_[sourceIndex].dependencies = static_cast<bool*>(allocator_->Malloc(sizeof(bool) * propertyCount_));
+                        std::memset(properties_[sourceIndex].dependencies, 0, sizeof(bool)* propertyCount_);
+                        for (ConstValueIterator targetItr = itr->value.Begin(); targetItr != itr->value.End(); ++targetItr) {
+                            SizeType targetIndex;
+                            if (FindPropertyIndex(*targetItr, &targetIndex))
+                                properties_[sourceIndex].dependencies[targetIndex] = true;
+                        }
+                    }
+                    else if (itr->value.IsObject()) {
+                        hasSchemaDependencies_ = true;
+                        schemaDocument->CreateSchema(&properties_[sourceIndex].dependenciesSchema, q.Append(itr->name, allocator_), itr->value, document);
+                        properties_[sourceIndex].dependenciesValidatorIndex = validatorCount_;
+                        validatorCount_++;
+                    }
+                }
+            }
+        }
+
+        if (const ValueType* v = GetMember(value, GetAdditionalPropertiesString())) {
+            if (v->IsBool())
+                additionalProperties_ = v->GetBool();
+            else if (v->IsObject())
+                schemaDocument->CreateSchema(&additionalPropertiesSchema_, p.Append(GetAdditionalPropertiesString(), allocator_), *v, document);
+        }
+
+        AssignIfExist(minProperties_, value, GetMinPropertiesString());
+        AssignIfExist(maxProperties_, value, GetMaxPropertiesString());
+
+        // Array
+        if (const ValueType* v = GetMember(value, GetItemsString())) {
+            PointerType q = p.Append(GetItemsString(), allocator_);
+            if (v->IsObject()) // List validation
+                schemaDocument->CreateSchema(&itemsList_, q, *v, document);
+            else if (v->IsArray()) { // Tuple validation
+                itemsTuple_ = static_cast<const Schema**>(allocator_->Malloc(sizeof(const Schema*) * v->Size()));
+                SizeType index = 0;
+                for (ConstValueIterator itr = v->Begin(); itr != v->End(); ++itr, index++)
+                    schemaDocument->CreateSchema(&itemsTuple_[itemsTupleCount_++], q.Append(index, allocator_), *itr, document);
+            }
+        }
+
+        AssignIfExist(minItems_, value, GetMinItemsString());
+        AssignIfExist(maxItems_, value, GetMaxItemsString());
+
+        if (const ValueType* v = GetMember(value, GetAdditionalItemsString())) {
+            if (v->IsBool())
+                additionalItems_ = v->GetBool();
+            else if (v->IsObject())
+                schemaDocument->CreateSchema(&additionalItemsSchema_, p.Append(GetAdditionalItemsString(), allocator_), *v, document);
+        }
+
+        AssignIfExist(uniqueItems_, value, GetUniqueItemsString());
+
+        // String
+        AssignIfExist(minLength_, value, GetMinLengthString());
+        AssignIfExist(maxLength_, value, GetMaxLengthString());
+
+        if (const ValueType* v = GetMember(value, GetPatternString()))
+            pattern_ = CreatePattern(*v);
+
+        // Number
+        if (const ValueType* v = GetMember(value, GetMinimumString()))
+            if (v->IsNumber())
+                minimum_.CopyFrom(*v, *allocator_);
+
+        if (const ValueType* v = GetMember(value, GetMaximumString()))
+            if (v->IsNumber())
+                maximum_.CopyFrom(*v, *allocator_);
+
+        AssignIfExist(exclusiveMinimum_, value, GetExclusiveMinimumString());
+        AssignIfExist(exclusiveMaximum_, value, GetExclusiveMaximumString());
+
+        if (const ValueType* v = GetMember(value, GetMultipleOfString()))
+            if (v->IsNumber() && v->GetDouble() > 0.0)
+                multipleOf_.CopyFrom(*v, *allocator_);
+    }
+
+    ~Schema() {
+        AllocatorType::Free(enum_);
+        if (properties_) {
+            for (SizeType i = 0; i < propertyCount_; i++)
+                properties_[i].~Property();
+            AllocatorType::Free(properties_);
+        }
+        if (patternProperties_) {
+            for (SizeType i = 0; i < patternPropertyCount_; i++)
+                patternProperties_[i].~PatternProperty();
+            AllocatorType::Free(patternProperties_);
+        }
+        AllocatorType::Free(itemsTuple_);
+#if RAPIDJSON_SCHEMA_HAS_REGEX
+        if (pattern_) {
+            pattern_->~RegexType();
+            AllocatorType::Free(pattern_);
+        }
+#endif
+    }
+
+    bool BeginValue(Context& context) const {
+        if (context.inArray) {
+            if (uniqueItems_)
+                context.valueUniqueness = true;
+
+            if (itemsList_)
+                context.valueSchema = itemsList_;
+            else if (itemsTuple_) {
+                if (context.arrayElementIndex < itemsTupleCount_)
+                    context.valueSchema = itemsTuple_[context.arrayElementIndex];
+                else if (additionalItemsSchema_)
+                    context.valueSchema = additionalItemsSchema_;
+                else if (additionalItems_)
+                    context.valueSchema = typeless_;
+                else
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetItemsString());
+            }
+            else
+                context.valueSchema = typeless_;
+
+            context.arrayElementIndex++;
+        }
+        return true;
+    }
+
+    RAPIDJSON_FORCEINLINE bool EndValue(Context& context) const {
+        if (context.patternPropertiesValidatorCount > 0) {
+            bool otherValid = false;
+            SizeType count = context.patternPropertiesValidatorCount;
+            if (context.objectPatternValidatorType != Context::kPatternValidatorOnly)
+                otherValid = context.patternPropertiesValidators[--count]->IsValid();
+
+            bool patternValid = true;
+            for (SizeType i = 0; i < count; i++)
+                if (!context.patternPropertiesValidators[i]->IsValid()) {
+                    patternValid = false;
+                    break;
+                }
+
+            if (context.objectPatternValidatorType == Context::kPatternValidatorOnly) {
+                if (!patternValid)
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetPatternPropertiesString());
+            }
+            else if (context.objectPatternValidatorType == Context::kPatternValidatorWithProperty) {
+                if (!patternValid || !otherValid)
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetPatternPropertiesString());
+            }
+            else if (!patternValid && !otherValid) // kPatternValidatorWithAdditionalProperty)
+                RAPIDJSON_INVALID_KEYWORD_RETURN(GetPatternPropertiesString());
+        }
+
+        if (enum_) {
+            const uint64_t h = context.factory.GetHashCode(context.hasher);
+            for (SizeType i = 0; i < enumCount_; i++)
+                if (enum_[i] == h)
+                    goto foundEnum;
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetEnumString());
+            foundEnum:;
+        }
+
+        if (allOf_.schemas)
+            for (SizeType i = allOf_.begin; i < allOf_.begin + allOf_.count; i++)
+                if (!context.validators[i]->IsValid())
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetAllOfString());
+        
+        if (anyOf_.schemas) {
+            for (SizeType i = anyOf_.begin; i < anyOf_.begin + anyOf_.count; i++)
+                if (context.validators[i]->IsValid())
+                    goto foundAny;
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetAnyOfString());
+            foundAny:;
+        }
+
+        if (oneOf_.schemas) {
+            bool oneValid = false;
+            for (SizeType i = oneOf_.begin; i < oneOf_.begin + oneOf_.count; i++)
+                if (context.validators[i]->IsValid()) {
+                    if (oneValid)
+                        RAPIDJSON_INVALID_KEYWORD_RETURN(GetOneOfString());
+                    else
+                        oneValid = true;
+                }
+            if (!oneValid)
+                RAPIDJSON_INVALID_KEYWORD_RETURN(GetOneOfString());
+        }
+
+        if (not_ && context.validators[notValidatorIndex_]->IsValid())
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetNotString());
+
+        return true;
+    }
+
+    bool Null(Context& context) const { 
+        if (!(type_ & (1 << kNullSchemaType)))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+        return CreateParallelValidator(context);
+    }
+    
+    bool Bool(Context& context, bool) const { 
+        if (!(type_ & (1 << kBooleanSchemaType)))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+        return CreateParallelValidator(context);
+    }
+
+    bool Int(Context& context, int i) const {
+        if (!CheckInt(context, i))
+            return false;
+        return CreateParallelValidator(context);
+    }
+
+    bool Uint(Context& context, unsigned u) const {
+        if (!CheckUint(context, u))
+            return false;
+        return CreateParallelValidator(context);
+    }
+
+    bool Int64(Context& context, int64_t i) const {
+        if (!CheckInt(context, i))
+            return false;
+        return CreateParallelValidator(context);
+    }
+
+    bool Uint64(Context& context, uint64_t u) const {
+        if (!CheckUint(context, u))
+            return false;
+        return CreateParallelValidator(context);
+    }
+
+    bool Double(Context& context, double d) const {
+        if (!(type_ & (1 << kNumberSchemaType)))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+
+        if (!minimum_.IsNull() && !CheckDoubleMinimum(context, d))
+            return false;
+
+        if (!maximum_.IsNull() && !CheckDoubleMaximum(context, d))
+            return false;
+        
+        if (!multipleOf_.IsNull() && !CheckDoubleMultipleOf(context, d))
+            return false;
+        
+        return CreateParallelValidator(context);
+    }
+    
+    bool String(Context& context, const Ch* str, SizeType length, bool) const {
+        if (!(type_ & (1 << kStringSchemaType)))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+
+        if (minLength_ != 0 || maxLength_ != SizeType(~0)) {
+            SizeType count;
+            if (internal::CountStringCodePoint<EncodingType>(str, length, &count)) {
+                if (count < minLength_)
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMinLengthString());
+                if (count > maxLength_)
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMaxLengthString());
+            }
+        }
+
+        if (pattern_ && !IsPatternMatch(pattern_, str, length))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetPatternString());
+
+        return CreateParallelValidator(context);
+    }
+
+    bool StartObject(Context& context) const { 
+        if (!(type_ & (1 << kObjectSchemaType)))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+
+        if (hasDependencies_ || hasRequired_) {
+            context.propertyExist = static_cast<bool*>(context.factory.MallocState(sizeof(bool) * propertyCount_));
+            std::memset(context.propertyExist, 0, sizeof(bool) * propertyCount_);
+        }
+
+        if (patternProperties_) { // pre-allocate schema array
+            SizeType count = patternPropertyCount_ + 1; // extra for valuePatternValidatorType
+            context.patternPropertiesSchemas = static_cast<const SchemaType**>(context.factory.MallocState(sizeof(const SchemaType*) * count));
+            context.patternPropertiesSchemaCount = 0;
+            std::memset(context.patternPropertiesSchemas, 0, sizeof(SchemaType*) * count);
+        }
+
+        return CreateParallelValidator(context);
+    }
+    
+    bool Key(Context& context, const Ch* str, SizeType len, bool) const {
+        if (patternProperties_) {
+            context.patternPropertiesSchemaCount = 0;
+            for (SizeType i = 0; i < patternPropertyCount_; i++)
+                if (patternProperties_[i].pattern && IsPatternMatch(patternProperties_[i].pattern, str, len)) {
+                    context.patternPropertiesSchemas[context.patternPropertiesSchemaCount++] = patternProperties_[i].schema;
+                    context.valueSchema = typeless_;
+                }
+        }
+
+        SizeType index;
+        if (FindPropertyIndex(ValueType(str, len).Move(), &index)) {
+            if (context.patternPropertiesSchemaCount > 0) {
+                context.patternPropertiesSchemas[context.patternPropertiesSchemaCount++] = properties_[index].schema;
+                context.valueSchema = typeless_;
+                context.valuePatternValidatorType = Context::kPatternValidatorWithProperty;
+            }
+            else
+                context.valueSchema = properties_[index].schema;
+
+            if (context.propertyExist)
+                context.propertyExist[index] = true;
+
+            return true;
+        }
+
+        if (additionalPropertiesSchema_) {
+            if (additionalPropertiesSchema_ && context.patternPropertiesSchemaCount > 0) {
+                context.patternPropertiesSchemas[context.patternPropertiesSchemaCount++] = additionalPropertiesSchema_;
+                context.valueSchema = typeless_;
+                context.valuePatternValidatorType = Context::kPatternValidatorWithAdditionalProperty;
+            }
+            else
+                context.valueSchema = additionalPropertiesSchema_;
+            return true;
+        }
+        else if (additionalProperties_) {
+            context.valueSchema = typeless_;
+            return true;
+        }
+
+        if (context.patternPropertiesSchemaCount == 0) // patternProperties are not additional properties
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetAdditionalPropertiesString());
+
+        return true;
+    }
+
+    bool EndObject(Context& context, SizeType memberCount) const {
+        if (hasRequired_)
+            for (SizeType index = 0; index < propertyCount_; index++)
+                if (properties_[index].required)
+                    if (!context.propertyExist[index])
+                        RAPIDJSON_INVALID_KEYWORD_RETURN(GetRequiredString());
+
+        if (memberCount < minProperties_)
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetMinPropertiesString());
+
+        if (memberCount > maxProperties_)
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetMaxPropertiesString());
+
+        if (hasDependencies_) {
+            for (SizeType sourceIndex = 0; sourceIndex < propertyCount_; sourceIndex++)
+                if (context.propertyExist[sourceIndex]) {
+                    if (properties_[sourceIndex].dependencies) {
+                        for (SizeType targetIndex = 0; targetIndex < propertyCount_; targetIndex++)
+                            if (properties_[sourceIndex].dependencies[targetIndex] && !context.propertyExist[targetIndex])
+                                RAPIDJSON_INVALID_KEYWORD_RETURN(GetDependenciesString());
+                    }
+                    else if (properties_[sourceIndex].dependenciesSchema)
+                        if (!context.validators[properties_[sourceIndex].dependenciesValidatorIndex]->IsValid())
+                            RAPIDJSON_INVALID_KEYWORD_RETURN(GetDependenciesString());
+                }
+        }
+
+        return true;
+    }
+
+    bool StartArray(Context& context) const { 
+        if (!(type_ & (1 << kArraySchemaType)))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+
+        context.arrayElementIndex = 0;
+        context.inArray = true;
+
+        return CreateParallelValidator(context);
+    }
+
+    bool EndArray(Context& context, SizeType elementCount) const { 
+        context.inArray = false;
+        
+        if (elementCount < minItems_)
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetMinItemsString());
+        
+        if (elementCount > maxItems_)
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetMaxItemsString());
+
+        return true;
+    }
+
+    // Generate functions for string literal according to Ch
+#define RAPIDJSON_STRING_(name, ...) \
+    static const ValueType& Get##name##String() {\
+        static const Ch s[] = { __VA_ARGS__, '\0' };\
+        static const ValueType v(s, static_cast<SizeType>(sizeof(s) / sizeof(Ch) - 1));\
+        return v;\
+    }
+
+    RAPIDJSON_STRING_(Null, 'n', 'u', 'l', 'l')
+    RAPIDJSON_STRING_(Boolean, 'b', 'o', 'o', 'l', 'e', 'a', 'n')
+    RAPIDJSON_STRING_(Object, 'o', 'b', 'j', 'e', 'c', 't')
+    RAPIDJSON_STRING_(Array, 'a', 'r', 'r', 'a', 'y')
+    RAPIDJSON_STRING_(String, 's', 't', 'r', 'i', 'n', 'g')
+    RAPIDJSON_STRING_(Number, 'n', 'u', 'm', 'b', 'e', 'r')
+    RAPIDJSON_STRING_(Integer, 'i', 'n', 't', 'e', 'g', 'e', 'r')
+    RAPIDJSON_STRING_(Type, 't', 'y', 'p', 'e')
+    RAPIDJSON_STRING_(Enum, 'e', 'n', 'u', 'm')
+    RAPIDJSON_STRING_(AllOf, 'a', 'l', 'l', 'O', 'f')
+    RAPIDJSON_STRING_(AnyOf, 'a', 'n', 'y', 'O', 'f')
+    RAPIDJSON_STRING_(OneOf, 'o', 'n', 'e', 'O', 'f')
+    RAPIDJSON_STRING_(Not, 'n', 'o', 't')
+    RAPIDJSON_STRING_(Properties, 'p', 'r', 'o', 'p', 'e', 'r', 't', 'i', 'e', 's')
+    RAPIDJSON_STRING_(Required, 'r', 'e', 'q', 'u', 'i', 'r', 'e', 'd')
+    RAPIDJSON_STRING_(Dependencies, 'd', 'e', 'p', 'e', 'n', 'd', 'e', 'n', 'c', 'i', 'e', 's')
+    RAPIDJSON_STRING_(PatternProperties, 'p', 'a', 't', 't', 'e', 'r', 'n', 'P', 'r', 'o', 'p', 'e', 'r', 't', 'i', 'e', 's')
+    RAPIDJSON_STRING_(AdditionalProperties, 'a', 'd', 'd', 'i', 't', 'i', 'o', 'n', 'a', 'l', 'P', 'r', 'o', 'p', 'e', 'r', 't', 'i', 'e', 's')
+    RAPIDJSON_STRING_(MinProperties, 'm', 'i', 'n', 'P', 'r', 'o', 'p', 'e', 'r', 't', 'i', 'e', 's')
+    RAPIDJSON_STRING_(MaxProperties, 'm', 'a', 'x', 'P', 'r', 'o', 'p', 'e', 'r', 't', 'i', 'e', 's')
+    RAPIDJSON_STRING_(Items, 'i', 't', 'e', 'm', 's')
+    RAPIDJSON_STRING_(MinItems, 'm', 'i', 'n', 'I', 't', 'e', 'm', 's')
+    RAPIDJSON_STRING_(MaxItems, 'm', 'a', 'x', 'I', 't', 'e', 'm', 's')
+    RAPIDJSON_STRING_(AdditionalItems, 'a', 'd', 'd', 'i', 't', 'i', 'o', 'n', 'a', 'l', 'I', 't', 'e', 'm', 's')
+    RAPIDJSON_STRING_(UniqueItems, 'u', 'n', 'i', 'q', 'u', 'e', 'I', 't', 'e', 'm', 's')
+    RAPIDJSON_STRING_(MinLength, 'm', 'i', 'n', 'L', 'e', 'n', 'g', 't', 'h')
+    RAPIDJSON_STRING_(MaxLength, 'm', 'a', 'x', 'L', 'e', 'n', 'g', 't', 'h')
+    RAPIDJSON_STRING_(Pattern, 'p', 'a', 't', 't', 'e', 'r', 'n')
+    RAPIDJSON_STRING_(Minimum, 'm', 'i', 'n', 'i', 'm', 'u', 'm')
+    RAPIDJSON_STRING_(Maximum, 'm', 'a', 'x', 'i', 'm', 'u', 'm')
+    RAPIDJSON_STRING_(ExclusiveMinimum, 'e', 'x', 'c', 'l', 'u', 's', 'i', 'v', 'e', 'M', 'i', 'n', 'i', 'm', 'u', 'm')
+    RAPIDJSON_STRING_(ExclusiveMaximum, 'e', 'x', 'c', 'l', 'u', 's', 'i', 'v', 'e', 'M', 'a', 'x', 'i', 'm', 'u', 'm')
+    RAPIDJSON_STRING_(MultipleOf, 'm', 'u', 'l', 't', 'i', 'p', 'l', 'e', 'O', 'f')
+
+#undef RAPIDJSON_STRING_
+
+private:
+    enum SchemaValueType {
+        kNullSchemaType,
+        kBooleanSchemaType,
+        kObjectSchemaType,
+        kArraySchemaType,
+        kStringSchemaType,
+        kNumberSchemaType,
+        kIntegerSchemaType,
+        kTotalSchemaType
+    };
+
+#if RAPIDJSON_SCHEMA_USE_INTERNALREGEX
+        typedef internal::GenericRegex<EncodingType, AllocatorType> RegexType;
+#elif RAPIDJSON_SCHEMA_USE_STDREGEX
+        typedef std::basic_regex<Ch> RegexType;
+#else
+        typedef char RegexType;
+#endif
+
+    struct SchemaArray {
+        SchemaArray() : schemas(), count() {}
+        ~SchemaArray() { AllocatorType::Free(schemas); }
+        const SchemaType** schemas;
+        SizeType begin; // begin index of context.validators
+        SizeType count;
+    };
+
+    template <typename V1, typename V2>
+    void AddUniqueElement(V1& a, const V2& v) {
+        for (typename V1::ConstValueIterator itr = a.Begin(); itr != a.End(); ++itr)
+            if (*itr == v)
+                return;
+        V1 c(v, *allocator_);
+        a.PushBack(c, *allocator_);
+    }
+
+    static const ValueType* GetMember(const ValueType& value, const ValueType& name) {
+        typename ValueType::ConstMemberIterator itr = value.FindMember(name);
+        return itr != value.MemberEnd() ? &(itr->value) : 0;
+    }
+
+    static void AssignIfExist(bool& out, const ValueType& value, const ValueType& name) {
+        if (const ValueType* v = GetMember(value, name))
+            if (v->IsBool())
+                out = v->GetBool();
+    }
+
+    static void AssignIfExist(SizeType& out, const ValueType& value, const ValueType& name) {
+        if (const ValueType* v = GetMember(value, name))
+            if (v->IsUint64() && v->GetUint64() <= SizeType(~0))
+                out = static_cast<SizeType>(v->GetUint64());
+    }
+
+    void AssignIfExist(SchemaArray& out, SchemaDocumentType& schemaDocument, const PointerType& p, const ValueType& value, const ValueType& name, const ValueType& document) {
+        if (const ValueType* v = GetMember(value, name)) {
+            if (v->IsArray() && v->Size() > 0) {
+                PointerType q = p.Append(name, allocator_);
+                out.count = v->Size();
+                out.schemas = static_cast<const Schema**>(allocator_->Malloc(out.count * sizeof(const Schema*)));
+                memset(out.schemas, 0, sizeof(Schema*)* out.count);
+                for (SizeType i = 0; i < out.count; i++)
+                    schemaDocument.CreateSchema(&out.schemas[i], q.Append(i, allocator_), (*v)[i], document);
+                out.begin = validatorCount_;
+                validatorCount_ += out.count;
+            }
+        }
+    }
+
+#if RAPIDJSON_SCHEMA_USE_INTERNALREGEX
+    template <typename ValueType>
+    RegexType* CreatePattern(const ValueType& value) {
+        if (value.IsString()) {
+            RegexType* r = new (allocator_->Malloc(sizeof(RegexType))) RegexType(value.GetString(), allocator_);
+            if (!r->IsValid()) {
+                r->~RegexType();
+                AllocatorType::Free(r);
+                r = 0;
+            }
+            return r;
+        }
+        return 0;
+    }
+
+    static bool IsPatternMatch(const RegexType* pattern, const Ch *str, SizeType) {
+        GenericRegexSearch<RegexType> rs(*pattern);
+        return rs.Search(str);
+    }
+#elif RAPIDJSON_SCHEMA_USE_STDREGEX
+    template <typename ValueType>
+    RegexType* CreatePattern(const ValueType& value) {
+        if (value.IsString())
+            try {
+                return new (allocator_->Malloc(sizeof(RegexType))) RegexType(value.GetString(), std::size_t(value.GetStringLength()), std::regex_constants::ECMAScript);
+            }
+            catch (const std::regex_error&) {
+            }
+        return 0;
+    }
+
+    static bool IsPatternMatch(const RegexType* pattern, const Ch *str, SizeType length) {
+        std::match_results<const Ch*> r;
+        return std::regex_search(str, str + length, r, *pattern);
+    }
+#else
+    template <typename ValueType>
+    RegexType* CreatePattern(const ValueType&) { return 0; }
+
+    static bool IsPatternMatch(const RegexType*, const Ch *, SizeType) { return true; }
+#endif // RAPIDJSON_SCHEMA_USE_STDREGEX
+
+    void AddType(const ValueType& type) {
+        if      (type == GetNullString()   ) type_ |= 1 << kNullSchemaType;
+        else if (type == GetBooleanString()) type_ |= 1 << kBooleanSchemaType;
+        else if (type == GetObjectString() ) type_ |= 1 << kObjectSchemaType;
+        else if (type == GetArrayString()  ) type_ |= 1 << kArraySchemaType;
+        else if (type == GetStringString() ) type_ |= 1 << kStringSchemaType;
+        else if (type == GetIntegerString()) type_ |= 1 << kIntegerSchemaType;
+        else if (type == GetNumberString() ) type_ |= (1 << kNumberSchemaType) | (1 << kIntegerSchemaType);
+    }
+
+    bool CreateParallelValidator(Context& context) const {
+        if (enum_ || context.arrayUniqueness)
+            context.hasher = context.factory.CreateHasher();
+
+        if (validatorCount_) {
+            RAPIDJSON_ASSERT(context.validators == 0);
+            context.validators = static_cast<ISchemaValidator**>(context.factory.MallocState(sizeof(ISchemaValidator*) * validatorCount_));
+            context.validatorCount = validatorCount_;
+
+            if (allOf_.schemas)
+                CreateSchemaValidators(context, allOf_);
+
+            if (anyOf_.schemas)
+                CreateSchemaValidators(context, anyOf_);
+            
+            if (oneOf_.schemas)
+                CreateSchemaValidators(context, oneOf_);
+            
+            if (not_)
+                context.validators[notValidatorIndex_] = context.factory.CreateSchemaValidator(*not_);
+            
+            if (hasSchemaDependencies_) {
+                for (SizeType i = 0; i < propertyCount_; i++)
+                    if (properties_[i].dependenciesSchema)
+                        context.validators[properties_[i].dependenciesValidatorIndex] = context.factory.CreateSchemaValidator(*properties_[i].dependenciesSchema);
+            }
+        }
+
+        return true;
+    }
+
+    void CreateSchemaValidators(Context& context, const SchemaArray& schemas) const {
+        for (SizeType i = 0; i < schemas.count; i++)
+            context.validators[schemas.begin + i] = context.factory.CreateSchemaValidator(*schemas.schemas[i]);
+    }
+
+    // O(n)
+    bool FindPropertyIndex(const ValueType& name, SizeType* outIndex) const {
+        SizeType len = name.GetStringLength();
+        const Ch* str = name.GetString();
+        for (SizeType index = 0; index < propertyCount_; index++)
+            if (properties_[index].name.GetStringLength() == len && 
+                (std::memcmp(properties_[index].name.GetString(), str, sizeof(Ch) * len) == 0))
+            {
+                *outIndex = index;
+                return true;
+            }
+        return false;
+    }
+
+    bool CheckInt(Context& context, int64_t i) const {
+        if (!(type_ & ((1 << kIntegerSchemaType) | (1 << kNumberSchemaType))))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+
+        if (!minimum_.IsNull()) {
+            if (minimum_.IsInt64()) {
+                if (exclusiveMinimum_ ? i <= minimum_.GetInt64() : i < minimum_.GetInt64())
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMinimumString());
+            }
+            else if (minimum_.IsUint64()) {
+                RAPIDJSON_INVALID_KEYWORD_RETURN(GetMinimumString()); // i <= max(int64_t) < minimum.GetUint64()
+            }
+            else if (!CheckDoubleMinimum(context, static_cast<double>(i)))
+                return false;
+        }
+
+        if (!maximum_.IsNull()) {
+            if (maximum_.IsInt64()) {
+                if (exclusiveMaximum_ ? i >= maximum_.GetInt64() : i > maximum_.GetInt64())
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMaximumString());
+            }
+            else if (maximum_.IsUint64()) { }
+                /* do nothing */ // i <= max(int64_t) < maximum_.GetUint64()
+            else if (!CheckDoubleMaximum(context, static_cast<double>(i)))
+                return false;
+        }
+
+        if (!multipleOf_.IsNull()) {
+            if (multipleOf_.IsUint64()) {
+                if (static_cast<uint64_t>(i >= 0 ? i : -i) % multipleOf_.GetUint64() != 0)
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMultipleOfString());
+            }
+            else if (!CheckDoubleMultipleOf(context, static_cast<double>(i)))
+                return false;
+        }
+
+        return true;
+    }
+
+    bool CheckUint(Context& context, uint64_t i) const {
+        if (!(type_ & ((1 << kIntegerSchemaType) | (1 << kNumberSchemaType))))
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetTypeString());
+
+        if (!minimum_.IsNull()) {
+            if (minimum_.IsUint64()) {
+                if (exclusiveMinimum_ ? i <= minimum_.GetUint64() : i < minimum_.GetUint64())
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMinimumString());
+            }
+            else if (minimum_.IsInt64())
+                /* do nothing */; // i >= 0 > minimum.Getint64()
+            else if (!CheckDoubleMinimum(context, static_cast<double>(i)))
+                return false;
+        }
+
+        if (!maximum_.IsNull()) {
+            if (maximum_.IsUint64()) {
+                if (exclusiveMaximum_ ? i >= maximum_.GetUint64() : i > maximum_.GetUint64())
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMaximumString());
+            }
+            else if (maximum_.IsInt64())
+                RAPIDJSON_INVALID_KEYWORD_RETURN(GetMaximumString()); // i >= 0 > maximum_
+            else if (!CheckDoubleMaximum(context, static_cast<double>(i)))
+                return false;
+        }
+
+        if (!multipleOf_.IsNull()) {
+            if (multipleOf_.IsUint64()) {
+                if (i % multipleOf_.GetUint64() != 0)
+                    RAPIDJSON_INVALID_KEYWORD_RETURN(GetMultipleOfString());
+            }
+            else if (!CheckDoubleMultipleOf(context, static_cast<double>(i)))
+                return false;
+        }
+
+        return true;
+    }
+
+    bool CheckDoubleMinimum(Context& context, double d) const {
+        if (exclusiveMinimum_ ? d <= minimum_.GetDouble() : d < minimum_.GetDouble())
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetMinimumString());
+        return true;
+    }
+
+    bool CheckDoubleMaximum(Context& context, double d) const {
+        if (exclusiveMaximum_ ? d >= maximum_.GetDouble() : d > maximum_.GetDouble())
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetMaximumString());
+        return true;
+    }
+
+    bool CheckDoubleMultipleOf(Context& context, double d) const {
+        double a = std::abs(d), b = std::abs(multipleOf_.GetDouble());
+        double q = std::floor(a / b);
+        double r = a - q * b;
+        if (r > 0.0)
+            RAPIDJSON_INVALID_KEYWORD_RETURN(GetMultipleOfString());
+        return true;
+    }
+
+    struct Property {
+        Property() : schema(), dependenciesSchema(), dependenciesValidatorIndex(), dependencies(), required(false) {}
+        ~Property() { AllocatorType::Free(dependencies); }
+        SValue name;
+        const SchemaType* schema;
+        const SchemaType* dependenciesSchema;
+        SizeType dependenciesValidatorIndex;
+        bool* dependencies;
+        bool required;
+    };
+
+    struct PatternProperty {
+        PatternProperty() : schema(), pattern() {}
+        ~PatternProperty() { 
+            if (pattern) {
+                pattern->~RegexType();
+                AllocatorType::Free(pattern);
+            }
+        }
+        const SchemaType* schema;
+        RegexType* pattern;
+    };
+
+    AllocatorType* allocator_;
+    const SchemaType* typeless_;
+    uint64_t* enum_;
+    SizeType enumCount_;
+    SchemaArray allOf_;
+    SchemaArray anyOf_;
+    SchemaArray oneOf_;
+    const SchemaType* not_;
+    unsigned type_; // bitmask of kSchemaType
+    SizeType validatorCount_;
+    SizeType notValidatorIndex_;
+
+    Property* properties_;
+    const SchemaType* additionalPropertiesSchema_;
+    PatternProperty* patternProperties_;
+    SizeType patternPropertyCount_;
+    SizeType propertyCount_;
+    SizeType minProperties_;
+    SizeType maxProperties_;
+    bool additionalProperties_;
+    bool hasDependencies_;
+    bool hasRequired_;
+    bool hasSchemaDependencies_;
+
+    const SchemaType* additionalItemsSchema_;
+    const SchemaType* itemsList_;
+    const SchemaType** itemsTuple_;
+    SizeType itemsTupleCount_;
+    SizeType minItems_;
+    SizeType maxItems_;
+    bool additionalItems_;
+    bool uniqueItems_;
+
+    RegexType* pattern_;
+    SizeType minLength_;
+    SizeType maxLength_;
+
+    SValue minimum_;
+    SValue maximum_;
+    SValue multipleOf_;
+    bool exclusiveMinimum_;
+    bool exclusiveMaximum_;
+};
+
+template<typename Stack, typename Ch>
+struct TokenHelper {
+    RAPIDJSON_FORCEINLINE static void AppendIndexToken(Stack& documentStack, SizeType index) {
+        *documentStack.template Push<Ch>() = '/';
+        char buffer[21];
+        size_t length = static_cast<size_t>((sizeof(SizeType) == 4 ? u32toa(index, buffer) : u64toa(index, buffer)) - buffer);
+        for (size_t i = 0; i < length; i++)
+            *documentStack.template Push<Ch>() = static_cast<Ch>(buffer[i]);
+    }
+};
+
+// Partial specialized version for char to prevent buffer copying.
+template <typename Stack>
+struct TokenHelper<Stack, char> {
+    RAPIDJSON_FORCEINLINE static void AppendIndexToken(Stack& documentStack, SizeType index) {
+        if (sizeof(SizeType) == 4) {
+            char *buffer = documentStack.template Push<char>(1 + 10); // '/' + uint
+            *buffer++ = '/';
+            const char* end = internal::u32toa(index, buffer);
+             documentStack.template Pop<char>(static_cast<size_t>(10 - (end - buffer)));
+        }
+        else {
+            char *buffer = documentStack.template Push<char>(1 + 20); // '/' + uint64
+            *buffer++ = '/';
+            const char* end = internal::u64toa(index, buffer);
+            documentStack.template Pop<char>(static_cast<size_t>(20 - (end - buffer)));
+        }
+    }
+};
+
+} // namespace internal
+
+///////////////////////////////////////////////////////////////////////////////
+// IGenericRemoteSchemaDocumentProvider
+
+template <typename SchemaDocumentType>
+class IGenericRemoteSchemaDocumentProvider {
+public:
+    typedef typename SchemaDocumentType::Ch Ch;
+
+    virtual ~IGenericRemoteSchemaDocumentProvider() {}
+    virtual const SchemaDocumentType* GetRemoteDocument(const Ch* uri, SizeType length) = 0;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericSchemaDocument
+
+//! JSON schema document.
+/*!
+    A JSON schema document is a compiled version of a JSON schema.
+    It is basically a tree of internal::Schema.
+
+    \note This is an immutable class (i.e. its instance cannot be modified after construction).
+    \tparam ValueT Type of JSON value (e.g. \c Value ), which also determine the encoding.
+    \tparam Allocator Allocator type for allocating memory of this document.
+*/
+template <typename ValueT, typename Allocator = CrtAllocator>
+class GenericSchemaDocument {
+public:
+    typedef ValueT ValueType;
+    typedef IGenericRemoteSchemaDocumentProvider<GenericSchemaDocument> IRemoteSchemaDocumentProviderType;
+    typedef Allocator AllocatorType;
+    typedef typename ValueType::EncodingType EncodingType;
+    typedef typename EncodingType::Ch Ch;
+    typedef internal::Schema<GenericSchemaDocument> SchemaType;
+    typedef GenericPointer<ValueType, Allocator> PointerType;
+    friend class internal::Schema<GenericSchemaDocument>;
+    template <typename, typename, typename>
+    friend class GenericSchemaValidator;
+
+    //! Constructor.
+    /*!
+        Compile a JSON document into schema document.
+
+        \param document A JSON document as source.
+        \param remoteProvider An optional remote schema document provider for resolving remote reference. Can be null.
+        \param allocator An optional allocator instance for allocating memory. Can be null.
+    */
+    explicit GenericSchemaDocument(const ValueType& document, IRemoteSchemaDocumentProviderType* remoteProvider = 0, Allocator* allocator = 0) :
+        remoteProvider_(remoteProvider),
+        allocator_(allocator),
+        ownAllocator_(),
+        root_(),
+        typeless_(),
+        schemaMap_(allocator, kInitialSchemaMapSize),
+        schemaRef_(allocator, kInitialSchemaRefSize)
+    {
+        if (!allocator_)
+            ownAllocator_ = allocator_ = RAPIDJSON_NEW(Allocator)();
+
+        typeless_ = static_cast<SchemaType*>(allocator_->Malloc(sizeof(SchemaType)));
+        new (typeless_) SchemaType(this, PointerType(), ValueType(kObjectType).Move(), ValueType(kObjectType).Move(), 0);
+
+        // Generate root schema, it will call CreateSchema() to create sub-schemas,
+        // And call AddRefSchema() if there are $ref.
+        CreateSchemaRecursive(&root_, PointerType(), document, document);
+
+        // Resolve $ref
+        while (!schemaRef_.Empty()) {
+            SchemaRefEntry* refEntry = schemaRef_.template Pop<SchemaRefEntry>(1);
+            if (const SchemaType* s = GetSchema(refEntry->target)) {
+                if (refEntry->schema)
+                    *refEntry->schema = s;
+
+                // Create entry in map if not exist
+                if (!GetSchema(refEntry->source)) {
+                    new (schemaMap_.template Push<SchemaEntry>()) SchemaEntry(refEntry->source, const_cast<SchemaType*>(s), false, allocator_);
+                }
+            }
+            else if (refEntry->schema)
+                *refEntry->schema = typeless_;
+
+            refEntry->~SchemaRefEntry();
+        }
+
+        RAPIDJSON_ASSERT(root_ != 0);
+
+        schemaRef_.ShrinkToFit(); // Deallocate all memory for ref
+    }
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    //! Move constructor in C++11
+    GenericSchemaDocument(GenericSchemaDocument&& rhs) RAPIDJSON_NOEXCEPT :
+        remoteProvider_(rhs.remoteProvider_),
+        allocator_(rhs.allocator_),
+        ownAllocator_(rhs.ownAllocator_),
+        root_(rhs.root_),
+        typeless_(rhs.typeless_),
+        schemaMap_(std::move(rhs.schemaMap_)),
+        schemaRef_(std::move(rhs.schemaRef_))
+    {
+        rhs.remoteProvider_ = 0;
+        rhs.allocator_ = 0;
+        rhs.ownAllocator_ = 0;
+        rhs.typeless_ = 0;
+    }
+#endif
+
+    //! Destructor
+    ~GenericSchemaDocument() {
+        while (!schemaMap_.Empty())
+            schemaMap_.template Pop<SchemaEntry>(1)->~SchemaEntry();
+
+        if (typeless_) {
+            typeless_->~SchemaType();
+            Allocator::Free(typeless_);
+        }
+
+        RAPIDJSON_DELETE(ownAllocator_);
+    }
+
+    //! Get the root schema.
+    const SchemaType& GetRoot() const { return *root_; }
+
+private:
+    //! Prohibit copying
+    GenericSchemaDocument(const GenericSchemaDocument&);
+    //! Prohibit assignment
+    GenericSchemaDocument& operator=(const GenericSchemaDocument&);
+
+    struct SchemaRefEntry {
+        SchemaRefEntry(const PointerType& s, const PointerType& t, const SchemaType** outSchema, Allocator *allocator) : source(s, allocator), target(t, allocator), schema(outSchema) {}
+        PointerType source;
+        PointerType target;
+        const SchemaType** schema;
+    };
+
+    struct SchemaEntry {
+        SchemaEntry(const PointerType& p, SchemaType* s, bool o, Allocator* allocator) : pointer(p, allocator), schema(s), owned(o) {}
+        ~SchemaEntry() {
+            if (owned) {
+                schema->~SchemaType();
+                Allocator::Free(schema);
+            }
+        }
+        PointerType pointer;
+        SchemaType* schema;
+        bool owned;
+    };
+
+    void CreateSchemaRecursive(const SchemaType** schema, const PointerType& pointer, const ValueType& v, const ValueType& document) {
+        if (schema)
+            *schema = typeless_;
+
+        if (v.GetType() == kObjectType) {
+            const SchemaType* s = GetSchema(pointer);
+            if (!s)
+                CreateSchema(schema, pointer, v, document);
+
+            for (typename ValueType::ConstMemberIterator itr = v.MemberBegin(); itr != v.MemberEnd(); ++itr)
+                CreateSchemaRecursive(0, pointer.Append(itr->name, allocator_), itr->value, document);
+        }
+        else if (v.GetType() == kArrayType)
+            for (SizeType i = 0; i < v.Size(); i++)
+                CreateSchemaRecursive(0, pointer.Append(i, allocator_), v[i], document);
+    }
+
+    void CreateSchema(const SchemaType** schema, const PointerType& pointer, const ValueType& v, const ValueType& document) {
+        RAPIDJSON_ASSERT(pointer.IsValid());
+        if (v.IsObject()) {
+            if (!HandleRefSchema(pointer, schema, v, document)) {
+                SchemaType* s = new (allocator_->Malloc(sizeof(SchemaType))) SchemaType(this, pointer, v, document, allocator_);
+                new (schemaMap_.template Push<SchemaEntry>()) SchemaEntry(pointer, s, true, allocator_);
+                if (schema)
+                    *schema = s;
+            }
+        }
+    }
+
+    bool HandleRefSchema(const PointerType& source, const SchemaType** schema, const ValueType& v, const ValueType& document) {
+        static const Ch kRefString[] = { '$', 'r', 'e', 'f', '\0' };
+        static const ValueType kRefValue(kRefString, 4);
+
+        typename ValueType::ConstMemberIterator itr = v.FindMember(kRefValue);
+        if (itr == v.MemberEnd())
+            return false;
+
+        if (itr->value.IsString()) {
+            SizeType len = itr->value.GetStringLength();
+            if (len > 0) {
+                const Ch* s = itr->value.GetString();
+                SizeType i = 0;
+                while (i < len && s[i] != '#') // Find the first #
+                    i++;
+
+                if (i > 0) { // Remote reference, resolve immediately
+                    if (remoteProvider_) {
+                        if (const GenericSchemaDocument* remoteDocument = remoteProvider_->GetRemoteDocument(s, i)) {
+                            PointerType pointer(&s[i], len - i, allocator_);
+                            if (pointer.IsValid()) {
+                                if (const SchemaType* sc = remoteDocument->GetSchema(pointer)) {
+                                    if (schema)
+                                        *schema = sc;
+                                    return true;
+                                }
+                            }
+                        }
+                    }
+                }
+                else if (s[i] == '#') { // Local reference, defer resolution
+                    PointerType pointer(&s[i], len - i, allocator_);
+                    if (pointer.IsValid()) {
+                        if (const ValueType* nv = pointer.Get(document))
+                            if (HandleRefSchema(source, schema, *nv, document))
+                                return true;
+
+                        new (schemaRef_.template Push<SchemaRefEntry>()) SchemaRefEntry(source, pointer, schema, allocator_);
+                        return true;
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    const SchemaType* GetSchema(const PointerType& pointer) const {
+        for (const SchemaEntry* target = schemaMap_.template Bottom<SchemaEntry>(); target != schemaMap_.template End<SchemaEntry>(); ++target)
+            if (pointer == target->pointer)
+                return target->schema;
+        return 0;
+    }
+
+    PointerType GetPointer(const SchemaType* schema) const {
+        for (const SchemaEntry* target = schemaMap_.template Bottom<SchemaEntry>(); target != schemaMap_.template End<SchemaEntry>(); ++target)
+            if (schema == target->schema)
+                return target->pointer;
+        return PointerType();
+    }
+
+    const SchemaType* GetTypeless() const { return typeless_; }
+
+    static const size_t kInitialSchemaMapSize = 64;
+    static const size_t kInitialSchemaRefSize = 64;
+
+    IRemoteSchemaDocumentProviderType* remoteProvider_;
+    Allocator *allocator_;
+    Allocator *ownAllocator_;
+    const SchemaType* root_;                //!< Root schema.
+    SchemaType* typeless_;
+    internal::Stack<Allocator> schemaMap_;  // Stores created Pointer -> Schemas
+    internal::Stack<Allocator> schemaRef_;  // Stores Pointer from $ref and schema which holds the $ref
+};
+
+//! GenericSchemaDocument using Value type.
+typedef GenericSchemaDocument<Value> SchemaDocument;
+//! IGenericRemoteSchemaDocumentProvider using SchemaDocument.
+typedef IGenericRemoteSchemaDocumentProvider<SchemaDocument> IRemoteSchemaDocumentProvider;
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericSchemaValidator
+
+//! JSON Schema Validator.
+/*!
+    A SAX style JSON schema validator.
+    It uses a \c GenericSchemaDocument to validate SAX events.
+    It delegates the incoming SAX events to an output handler.
+    The default output handler does nothing.
+    It can be reused multiple times by calling \c Reset().
+
+    \tparam SchemaDocumentType Type of schema document.
+    \tparam OutputHandler Type of output handler. Default handler does nothing.
+    \tparam StateAllocator Allocator for storing the internal validation states.
+*/
+template <
+    typename SchemaDocumentType,
+    typename OutputHandler = BaseReaderHandler<typename SchemaDocumentType::SchemaType::EncodingType>,
+    typename StateAllocator = CrtAllocator>
+class GenericSchemaValidator :
+    public internal::ISchemaStateFactory<typename SchemaDocumentType::SchemaType>, 
+    public internal::ISchemaValidator
+{
+public:
+    typedef typename SchemaDocumentType::SchemaType SchemaType;
+    typedef typename SchemaDocumentType::PointerType PointerType;
+    typedef typename SchemaType::EncodingType EncodingType;
+    typedef typename EncodingType::Ch Ch;
+
+    //! Constructor without output handler.
+    /*!
+        \param schemaDocument The schema document to conform to.
+        \param allocator Optional allocator for storing internal validation states.
+        \param schemaStackCapacity Optional initial capacity of schema path stack.
+        \param documentStackCapacity Optional initial capacity of document path stack.
+    */
+    GenericSchemaValidator(
+        const SchemaDocumentType& schemaDocument,
+        StateAllocator* allocator = 0, 
+        size_t schemaStackCapacity = kDefaultSchemaStackCapacity,
+        size_t documentStackCapacity = kDefaultDocumentStackCapacity)
+        :
+        schemaDocument_(&schemaDocument),
+        root_(schemaDocument.GetRoot()),
+        stateAllocator_(allocator),
+        ownStateAllocator_(0),
+        schemaStack_(allocator, schemaStackCapacity),
+        documentStack_(allocator, documentStackCapacity),
+        outputHandler_(0),
+        valid_(true)
+#if RAPIDJSON_SCHEMA_VERBOSE
+        , depth_(0)
+#endif
+    {
+    }
+
+    //! Constructor with output handler.
+    /*!
+        \param schemaDocument The schema document to conform to.
+        \param allocator Optional allocator for storing internal validation states.
+        \param schemaStackCapacity Optional initial capacity of schema path stack.
+        \param documentStackCapacity Optional initial capacity of document path stack.
+    */
+    GenericSchemaValidator(
+        const SchemaDocumentType& schemaDocument,
+        OutputHandler& outputHandler,
+        StateAllocator* allocator = 0, 
+        size_t schemaStackCapacity = kDefaultSchemaStackCapacity,
+        size_t documentStackCapacity = kDefaultDocumentStackCapacity)
+        :
+        schemaDocument_(&schemaDocument),
+        root_(schemaDocument.GetRoot()),
+        stateAllocator_(allocator),
+        ownStateAllocator_(0),
+        schemaStack_(allocator, schemaStackCapacity),
+        documentStack_(allocator, documentStackCapacity),
+        outputHandler_(&outputHandler),
+        valid_(true)
+#if RAPIDJSON_SCHEMA_VERBOSE
+        , depth_(0)
+#endif
+    {
+    }
+
+    //! Destructor.
+    ~GenericSchemaValidator() {
+        Reset();
+        RAPIDJSON_DELETE(ownStateAllocator_);
+    }
+
+    //! Reset the internal states.
+    void Reset() {
+        while (!schemaStack_.Empty())
+            PopSchema();
+        documentStack_.Clear();
+        valid_ = true;
+    }
+
+    //! Checks whether the current state is valid.
+    // Implementation of ISchemaValidator
+    virtual bool IsValid() const { return valid_; }
+
+    //! Gets the JSON pointer pointed to the invalid schema.
+    PointerType GetInvalidSchemaPointer() const {
+        return schemaStack_.Empty() ? PointerType() : schemaDocument_->GetPointer(&CurrentSchema());
+    }
+
+    //! Gets the keyword of invalid schema.
+    const Ch* GetInvalidSchemaKeyword() const {
+        return schemaStack_.Empty() ? 0 : CurrentContext().invalidKeyword;
+    }
+
+    //! Gets the JSON pointer pointed to the invalid value.
+    PointerType GetInvalidDocumentPointer() const {
+        return documentStack_.Empty() ? PointerType() : PointerType(documentStack_.template Bottom<Ch>(), documentStack_.GetSize() / sizeof(Ch));
+    }
+
+#if RAPIDJSON_SCHEMA_VERBOSE
+#define RAPIDJSON_SCHEMA_HANDLE_BEGIN_VERBOSE_() \
+RAPIDJSON_MULTILINEMACRO_BEGIN\
+    *documentStack_.template Push<Ch>() = '\0';\
+    documentStack_.template Pop<Ch>(1);\
+    internal::PrintInvalidDocument(documentStack_.template Bottom<Ch>());\
+RAPIDJSON_MULTILINEMACRO_END
+#else
+#define RAPIDJSON_SCHEMA_HANDLE_BEGIN_VERBOSE_()
+#endif
+
+#define RAPIDJSON_SCHEMA_HANDLE_BEGIN_(method, arg1)\
+    if (!valid_) return false; \
+    if (!BeginValue() || !CurrentSchema().method arg1) {\
+        RAPIDJSON_SCHEMA_HANDLE_BEGIN_VERBOSE_();\
+        return valid_ = false;\
+    }
+
+#define RAPIDJSON_SCHEMA_HANDLE_PARALLEL_(method, arg2)\
+    for (Context* context = schemaStack_.template Bottom<Context>(); context != schemaStack_.template End<Context>(); context++) {\
+        if (context->hasher)\
+            static_cast<HasherType*>(context->hasher)->method arg2;\
+        if (context->validators)\
+            for (SizeType i_ = 0; i_ < context->validatorCount; i_++)\
+                static_cast<GenericSchemaValidator*>(context->validators[i_])->method arg2;\
+        if (context->patternPropertiesValidators)\
+            for (SizeType i_ = 0; i_ < context->patternPropertiesValidatorCount; i_++)\
+                static_cast<GenericSchemaValidator*>(context->patternPropertiesValidators[i_])->method arg2;\
+    }
+
+#define RAPIDJSON_SCHEMA_HANDLE_END_(method, arg2)\
+    return valid_ = EndValue() && (!outputHandler_ || outputHandler_->method arg2)
+
+#define RAPIDJSON_SCHEMA_HANDLE_VALUE_(method, arg1, arg2) \
+    RAPIDJSON_SCHEMA_HANDLE_BEGIN_   (method, arg1);\
+    RAPIDJSON_SCHEMA_HANDLE_PARALLEL_(method, arg2);\
+    RAPIDJSON_SCHEMA_HANDLE_END_     (method, arg2)
+
+    bool Null()             { RAPIDJSON_SCHEMA_HANDLE_VALUE_(Null,   (CurrentContext()   ), ( )); }
+    bool Bool(bool b)       { RAPIDJSON_SCHEMA_HANDLE_VALUE_(Bool,   (CurrentContext(), b), (b)); }
+    bool Int(int i)         { RAPIDJSON_SCHEMA_HANDLE_VALUE_(Int,    (CurrentContext(), i), (i)); }
+    bool Uint(unsigned u)   { RAPIDJSON_SCHEMA_HANDLE_VALUE_(Uint,   (CurrentContext(), u), (u)); }
+    bool Int64(int64_t i)   { RAPIDJSON_SCHEMA_HANDLE_VALUE_(Int64,  (CurrentContext(), i), (i)); }
+    bool Uint64(uint64_t u) { RAPIDJSON_SCHEMA_HANDLE_VALUE_(Uint64, (CurrentContext(), u), (u)); }
+    bool Double(double d)   { RAPIDJSON_SCHEMA_HANDLE_VALUE_(Double, (CurrentContext(), d), (d)); }
+    bool RawNumber(const Ch* str, SizeType length, bool copy)
+                                    { RAPIDJSON_SCHEMA_HANDLE_VALUE_(String, (CurrentContext(), str, length, copy), (str, length, copy)); }
+    bool String(const Ch* str, SizeType length, bool copy)
+                                    { RAPIDJSON_SCHEMA_HANDLE_VALUE_(String, (CurrentContext(), str, length, copy), (str, length, copy)); }
+
+    bool StartObject() {
+        RAPIDJSON_SCHEMA_HANDLE_BEGIN_(StartObject, (CurrentContext()));
+        RAPIDJSON_SCHEMA_HANDLE_PARALLEL_(StartObject, ());
+        return valid_ = !outputHandler_ || outputHandler_->StartObject();
+    }
+    
+    bool Key(const Ch* str, SizeType len, bool copy) {
+        if (!valid_) return false;
+        AppendToken(str, len);
+        if (!CurrentSchema().Key(CurrentContext(), str, len, copy)) return valid_ = false;
+        RAPIDJSON_SCHEMA_HANDLE_PARALLEL_(Key, (str, len, copy));
+        return valid_ = !outputHandler_ || outputHandler_->Key(str, len, copy);
+    }
+    
+    bool EndObject(SizeType memberCount) { 
+        if (!valid_) return false;
+        RAPIDJSON_SCHEMA_HANDLE_PARALLEL_(EndObject, (memberCount));
+        if (!CurrentSchema().EndObject(CurrentContext(), memberCount)) return valid_ = false;
+        RAPIDJSON_SCHEMA_HANDLE_END_(EndObject, (memberCount));
+    }
+
+    bool StartArray() {
+        RAPIDJSON_SCHEMA_HANDLE_BEGIN_(StartArray, (CurrentContext()));
+        RAPIDJSON_SCHEMA_HANDLE_PARALLEL_(StartArray, ());
+        return valid_ = !outputHandler_ || outputHandler_->StartArray();
+    }
+    
+    bool EndArray(SizeType elementCount) {
+        if (!valid_) return false;
+        RAPIDJSON_SCHEMA_HANDLE_PARALLEL_(EndArray, (elementCount));
+        if (!CurrentSchema().EndArray(CurrentContext(), elementCount)) return valid_ = false;
+        RAPIDJSON_SCHEMA_HANDLE_END_(EndArray, (elementCount));
+    }
+
+#undef RAPIDJSON_SCHEMA_HANDLE_BEGIN_VERBOSE_
+#undef RAPIDJSON_SCHEMA_HANDLE_BEGIN_
+#undef RAPIDJSON_SCHEMA_HANDLE_PARALLEL_
+#undef RAPIDJSON_SCHEMA_HANDLE_VALUE_
+
+    // Implementation of ISchemaStateFactory<SchemaType>
+    virtual ISchemaValidator* CreateSchemaValidator(const SchemaType& root) {
+        return new (GetStateAllocator().Malloc(sizeof(GenericSchemaValidator))) GenericSchemaValidator(*schemaDocument_, root,
+#if RAPIDJSON_SCHEMA_VERBOSE
+        depth_ + 1,
+#endif
+        &GetStateAllocator());
+    }
+
+    virtual void DestroySchemaValidator(ISchemaValidator* validator) {
+        GenericSchemaValidator* v = static_cast<GenericSchemaValidator*>(validator);
+        v->~GenericSchemaValidator();
+        StateAllocator::Free(v);
+    }
+
+    virtual void* CreateHasher() {
+        return new (GetStateAllocator().Malloc(sizeof(HasherType))) HasherType(&GetStateAllocator());
+    }
+
+    virtual uint64_t GetHashCode(void* hasher) {
+        return static_cast<HasherType*>(hasher)->GetHashCode();
+    }
+
+    virtual void DestroryHasher(void* hasher) {
+        HasherType* h = static_cast<HasherType*>(hasher);
+        h->~HasherType();
+        StateAllocator::Free(h);
+    }
+
+    virtual void* MallocState(size_t size) {
+        return GetStateAllocator().Malloc(size);
+    }
+
+    virtual void FreeState(void* p) {
+        StateAllocator::Free(p);
+    }
+
+private:
+    typedef typename SchemaType::Context Context;
+    typedef GenericValue<UTF8<>, StateAllocator> HashCodeArray;
+    typedef internal::Hasher<EncodingType, StateAllocator> HasherType;
+
+    GenericSchemaValidator( 
+        const SchemaDocumentType& schemaDocument,
+        const SchemaType& root,
+#if RAPIDJSON_SCHEMA_VERBOSE
+        unsigned depth,
+#endif
+        StateAllocator* allocator = 0,
+        size_t schemaStackCapacity = kDefaultSchemaStackCapacity,
+        size_t documentStackCapacity = kDefaultDocumentStackCapacity)
+        :
+        schemaDocument_(&schemaDocument),
+        root_(root),
+        stateAllocator_(allocator),
+        ownStateAllocator_(0),
+        schemaStack_(allocator, schemaStackCapacity),
+        documentStack_(allocator, documentStackCapacity),
+        outputHandler_(0),
+        valid_(true)
+#if RAPIDJSON_SCHEMA_VERBOSE
+        , depth_(depth)
+#endif
+    {
+    }
+
+    StateAllocator& GetStateAllocator() {
+        if (!stateAllocator_)
+            stateAllocator_ = ownStateAllocator_ = RAPIDJSON_NEW(StateAllocator)();
+        return *stateAllocator_;
+    }
+
+    bool BeginValue() {
+        if (schemaStack_.Empty())
+            PushSchema(root_);
+        else {
+            if (CurrentContext().inArray)
+                internal::TokenHelper<internal::Stack<StateAllocator>, Ch>::AppendIndexToken(documentStack_, CurrentContext().arrayElementIndex);
+
+            if (!CurrentSchema().BeginValue(CurrentContext()))
+                return false;
+
+            SizeType count = CurrentContext().patternPropertiesSchemaCount;
+            const SchemaType** sa = CurrentContext().patternPropertiesSchemas;
+            typename Context::PatternValidatorType patternValidatorType = CurrentContext().valuePatternValidatorType;
+            bool valueUniqueness = CurrentContext().valueUniqueness;
+            RAPIDJSON_ASSERT(CurrentContext().valueSchema);
+            PushSchema(*CurrentContext().valueSchema);
+
+            if (count > 0) {
+                CurrentContext().objectPatternValidatorType = patternValidatorType;
+                ISchemaValidator**& va = CurrentContext().patternPropertiesValidators;
+                SizeType& validatorCount = CurrentContext().patternPropertiesValidatorCount;
+                va = static_cast<ISchemaValidator**>(MallocState(sizeof(ISchemaValidator*) * count));
+                for (SizeType i = 0; i < count; i++)
+                    va[validatorCount++] = CreateSchemaValidator(*sa[i]);
+            }
+
+            CurrentContext().arrayUniqueness = valueUniqueness;
+        }
+        return true;
+    }
+
+    bool EndValue() {
+        if (!CurrentSchema().EndValue(CurrentContext()))
+            return false;
+
+#if RAPIDJSON_SCHEMA_VERBOSE
+        GenericStringBuffer<EncodingType> sb;
+        schemaDocument_->GetPointer(&CurrentSchema()).Stringify(sb);
+
+        *documentStack_.template Push<Ch>() = '\0';
+        documentStack_.template Pop<Ch>(1);
+        internal::PrintValidatorPointers(depth_, sb.GetString(), documentStack_.template Bottom<Ch>());
+#endif
+
+        uint64_t h = CurrentContext().arrayUniqueness ? static_cast<HasherType*>(CurrentContext().hasher)->GetHashCode() : 0;
+        
+        PopSchema();
+
+        if (!schemaStack_.Empty()) {
+            Context& context = CurrentContext();
+            if (context.valueUniqueness) {
+                HashCodeArray* a = static_cast<HashCodeArray*>(context.arrayElementHashCodes);
+                if (!a)
+                    CurrentContext().arrayElementHashCodes = a = new (GetStateAllocator().Malloc(sizeof(HashCodeArray))) HashCodeArray(kArrayType);
+                for (typename HashCodeArray::ConstValueIterator itr = a->Begin(); itr != a->End(); ++itr)
+                    if (itr->GetUint64() == h)
+                        RAPIDJSON_INVALID_KEYWORD_RETURN(SchemaType::GetUniqueItemsString());
+                a->PushBack(h, GetStateAllocator());
+            }
+        }
+
+        // Remove the last token of document pointer
+        while (!documentStack_.Empty() && *documentStack_.template Pop<Ch>(1) != '/')
+            ;
+
+        return true;
+    }
+
+    void AppendToken(const Ch* str, SizeType len) {
+        documentStack_.template Reserve<Ch>(1 + len * 2); // worst case all characters are escaped as two characters
+        *documentStack_.template PushUnsafe<Ch>() = '/';
+        for (SizeType i = 0; i < len; i++) {
+            if (str[i] == '~') {
+                *documentStack_.template PushUnsafe<Ch>() = '~';
+                *documentStack_.template PushUnsafe<Ch>() = '0';
+            }
+            else if (str[i] == '/') {
+                *documentStack_.template PushUnsafe<Ch>() = '~';
+                *documentStack_.template PushUnsafe<Ch>() = '1';
+            }
+            else
+                *documentStack_.template PushUnsafe<Ch>() = str[i];
+        }
+    }
+
+    RAPIDJSON_FORCEINLINE void PushSchema(const SchemaType& schema) { new (schemaStack_.template Push<Context>()) Context(*this, &schema); }
+    
+    RAPIDJSON_FORCEINLINE void PopSchema() {
+        Context* c = schemaStack_.template Pop<Context>(1);
+        if (HashCodeArray* a = static_cast<HashCodeArray*>(c->arrayElementHashCodes)) {
+            a->~HashCodeArray();
+            StateAllocator::Free(a);
+        }
+        c->~Context();
+    }
+
+    const SchemaType& CurrentSchema() const { return *schemaStack_.template Top<Context>()->schema; }
+    Context& CurrentContext() { return *schemaStack_.template Top<Context>(); }
+    const Context& CurrentContext() const { return *schemaStack_.template Top<Context>(); }
+
+    static const size_t kDefaultSchemaStackCapacity = 1024;
+    static const size_t kDefaultDocumentStackCapacity = 256;
+    const SchemaDocumentType* schemaDocument_;
+    const SchemaType& root_;
+    StateAllocator* stateAllocator_;
+    StateAllocator* ownStateAllocator_;
+    internal::Stack<StateAllocator> schemaStack_;    //!< stack to store the current path of schema (BaseSchemaType *)
+    internal::Stack<StateAllocator> documentStack_;  //!< stack to store the current path of validating document (Ch)
+    OutputHandler* outputHandler_;
+    bool valid_;
+#if RAPIDJSON_SCHEMA_VERBOSE
+    unsigned depth_;
+#endif
+};
+
+typedef GenericSchemaValidator<SchemaDocument> SchemaValidator;
+
+///////////////////////////////////////////////////////////////////////////////
+// SchemaValidatingReader
+
+//! A helper class for parsing with validation.
+/*!
+    This helper class is a functor, designed as a parameter of \ref GenericDocument::Populate().
+
+    \tparam parseFlags Combination of \ref ParseFlag.
+    \tparam InputStream Type of input stream, implementing Stream concept.
+    \tparam SourceEncoding Encoding of the input stream.
+    \tparam SchemaDocumentType Type of schema document.
+    \tparam StackAllocator Allocator type for stack.
+*/
+template <
+    unsigned parseFlags,
+    typename InputStream,
+    typename SourceEncoding,
+    typename SchemaDocumentType = SchemaDocument,
+    typename StackAllocator = CrtAllocator>
+class SchemaValidatingReader {
+public:
+    typedef typename SchemaDocumentType::PointerType PointerType;
+    typedef typename InputStream::Ch Ch;
+
+    //! Constructor
+    /*!
+        \param is Input stream.
+        \param sd Schema document.
+    */
+    SchemaValidatingReader(InputStream& is, const SchemaDocumentType& sd) : is_(is), sd_(sd), invalidSchemaKeyword_(), isValid_(true) {}
+
+    template <typename Handler>
+    bool operator()(Handler& handler) {
+        GenericReader<SourceEncoding, typename SchemaDocumentType::EncodingType, StackAllocator> reader;
+        GenericSchemaValidator<SchemaDocumentType, Handler> validator(sd_, handler);
+        parseResult_ = reader.template Parse<parseFlags>(is_, validator);
+
+        isValid_ = validator.IsValid();
+        if (isValid_) {
+            invalidSchemaPointer_ = PointerType();
+            invalidSchemaKeyword_ = 0;
+            invalidDocumentPointer_ = PointerType();
+        }
+        else {
+            invalidSchemaPointer_ = validator.GetInvalidSchemaPointer();
+            invalidSchemaKeyword_ = validator.GetInvalidSchemaKeyword();
+            invalidDocumentPointer_ = validator.GetInvalidDocumentPointer();
+        }
+
+        return parseResult_;
+    }
+
+    const ParseResult& GetParseResult() const { return parseResult_; }
+    bool IsValid() const { return isValid_; }
+    const PointerType& GetInvalidSchemaPointer() const { return invalidSchemaPointer_; }
+    const Ch* GetInvalidSchemaKeyword() const { return invalidSchemaKeyword_; }
+    const PointerType& GetInvalidDocumentPointer() const { return invalidDocumentPointer_; }
+
+private:
+    InputStream& is_;
+    const SchemaDocumentType& sd_;
+
+    ParseResult parseResult_;
+    PointerType invalidSchemaPointer_;
+    const Ch* invalidSchemaKeyword_;
+    PointerType invalidDocumentPointer_;
+    bool isValid_;
+};
+
+RAPIDJSON_NAMESPACE_END
+RAPIDJSON_DIAG_POP
+
+#endif // RAPIDJSON_SCHEMA_H_
diff --git a/external/rapidjson/stream.h b/external/rapidjson/stream.h
new file mode 100644
index 0000000..7f2643e
--- /dev/null
+++ b/external/rapidjson/stream.h
@@ -0,0 +1,223 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+//
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+#include "rapidjson.h"
+
+#ifndef RAPIDJSON_STREAM_H_
+#define RAPIDJSON_STREAM_H_
+
+#include "encodings.h"
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+//  Stream
+
+/*! \class rapidjson::Stream
+    \brief Concept for reading and writing characters.
+
+    For read-only stream, no need to implement PutBegin(), Put(), Flush() and PutEnd().
+
+    For write-only stream, only need to implement Put() and Flush().
+
+\code
+concept Stream {
+    typename Ch;    //!< Character type of the stream.
+
+    //! Read the current character from stream without moving the read cursor.
+    Ch Peek() const;
+
+    //! Read the current character from stream and moving the read cursor to next character.
+    Ch Take();
+
+    //! Get the current read cursor.
+    //! \return Number of characters read from start.
+    size_t Tell();
+
+    //! Begin writing operation at the current read pointer.
+    //! \return The begin writer pointer.
+    Ch* PutBegin();
+
+    //! Write a character.
+    void Put(Ch c);
+
+    //! Flush the buffer.
+    void Flush();
+
+    //! End the writing operation.
+    //! \param begin The begin write pointer returned by PutBegin().
+    //! \return Number of characters written.
+    size_t PutEnd(Ch* begin);
+}
+\endcode
+*/
+
+//! Provides additional information for stream.
+/*!
+    By using traits pattern, this type provides a default configuration for stream.
+    For custom stream, this type can be specialized for other configuration.
+    See TEST(Reader, CustomStringStream) in readertest.cpp for example.
+*/
+template<typename Stream>
+struct StreamTraits {
+    //! Whether to make local copy of stream for optimization during parsing.
+    /*!
+        By default, for safety, streams do not use local copy optimization.
+        Stream that can be copied fast should specialize this, like StreamTraits<StringStream>.
+    */
+    enum { copyOptimization = 0 };
+};
+
+//! Reserve n characters for writing to a stream.
+template<typename Stream>
+inline void PutReserve(Stream& stream, size_t count) {
+    (void)stream;
+    (void)count;
+}
+
+//! Write character to a stream, presuming buffer is reserved.
+template<typename Stream>
+inline void PutUnsafe(Stream& stream, typename Stream::Ch c) {
+    stream.Put(c);
+}
+
+//! Put N copies of a character to a stream.
+template<typename Stream, typename Ch>
+inline void PutN(Stream& stream, Ch c, size_t n) {
+    PutReserve(stream, n);
+    for (size_t i = 0; i < n; i++)
+        PutUnsafe(stream, c);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// GenericStreamWrapper
+
+//! A Stream Wrapper
+/*! \tThis string stream is a wrapper for any stream by just forwarding any
+    \treceived message to the origin stream.
+    \note implements Stream concept
+*/
+
+#if defined(_MSC_VER) && _MSC_VER <= 1800
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4702)  // unreachable code
+RAPIDJSON_DIAG_OFF(4512)  // assignment operator could not be generated
+#endif
+
+template <typename InputStream, typename Encoding = UTF8<> >
+class GenericStreamWrapper {
+public:
+    typedef typename Encoding::Ch Ch;
+    GenericStreamWrapper(InputStream& is): is_(is) {}
+
+    Ch Peek() const { return is_.Peek(); }
+    Ch Take() { return is_.Take(); }
+    size_t Tell() { return is_.Tell(); }
+    Ch* PutBegin() { return is_.PutBegin(); }
+    void Put(Ch ch) { is_.Put(ch); }
+    void Flush() { is_.Flush(); }
+    size_t PutEnd(Ch* ch) { return is_.PutEnd(ch); }
+
+    // wrapper for MemoryStream
+    const Ch* Peek4() const { return is_.Peek4(); }
+
+    // wrapper for AutoUTFInputStream
+    UTFType GetType() const { return is_.GetType(); }
+    bool HasBOM() const { return is_.HasBOM(); }
+
+protected:
+    InputStream& is_;
+};
+
+#if defined(_MSC_VER) && _MSC_VER <= 1800
+RAPIDJSON_DIAG_POP
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+// StringStream
+
+//! Read-only string stream.
+/*! \note implements Stream concept
+*/
+template <typename Encoding>
+struct GenericStringStream {
+    typedef typename Encoding::Ch Ch;
+
+    GenericStringStream(const Ch *src) : src_(src), head_(src) {}
+
+    Ch Peek() const { return *src_; }
+    Ch Take() { return *src_++; }
+    size_t Tell() const { return static_cast<size_t>(src_ - head_); }
+
+    Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
+    void Put(Ch) { RAPIDJSON_ASSERT(false); }
+    void Flush() { RAPIDJSON_ASSERT(false); }
+    size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
+
+    const Ch* src_;     //!< Current read position.
+    const Ch* head_;    //!< Original head of the string.
+};
+
+template <typename Encoding>
+struct StreamTraits<GenericStringStream<Encoding> > {
+    enum { copyOptimization = 1 };
+};
+
+//! String stream with UTF8 encoding.
+typedef GenericStringStream<UTF8<> > StringStream;
+
+///////////////////////////////////////////////////////////////////////////////
+// InsituStringStream
+
+//! A read-write string stream.
+/*! This string stream is particularly designed for in-situ parsing.
+    \note implements Stream concept
+*/
+template <typename Encoding>
+struct GenericInsituStringStream {
+    typedef typename Encoding::Ch Ch;
+
+    GenericInsituStringStream(Ch *src) : src_(src), dst_(0), head_(src) {}
+
+    // Read
+    Ch Peek() { return *src_; }
+    Ch Take() { return *src_++; }
+    size_t Tell() { return static_cast<size_t>(src_ - head_); }
+
+    // Write
+    void Put(Ch c) { RAPIDJSON_ASSERT(dst_ != 0); *dst_++ = c; }
+
+    Ch* PutBegin() { return dst_ = src_; }
+    size_t PutEnd(Ch* begin) { return static_cast<size_t>(dst_ - begin); }
+    void Flush() {}
+
+    Ch* Push(size_t count) { Ch* begin = dst_; dst_ += count; return begin; }
+    void Pop(size_t count) { dst_ -= count; }
+
+    Ch* src_;
+    Ch* dst_;
+    Ch* head_;
+};
+
+template <typename Encoding>
+struct StreamTraits<GenericInsituStringStream<Encoding> > {
+    enum { copyOptimization = 1 };
+};
+
+//! Insitu string stream with UTF8 encoding.
+typedef GenericInsituStringStream<UTF8<> > InsituStringStream;
+
+RAPIDJSON_NAMESPACE_END
+
+#endif // RAPIDJSON_STREAM_H_
diff --git a/external/rapidjson/stringbuffer.h b/external/rapidjson/stringbuffer.h
new file mode 100644
index 0000000..4e38b82
--- /dev/null
+++ b/external/rapidjson/stringbuffer.h
@@ -0,0 +1,121 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_STRINGBUFFER_H_
+#define RAPIDJSON_STRINGBUFFER_H_
+
+#include "stream.h"
+#include "internal/stack.h"
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+#include <utility> // std::move
+#endif
+
+#include "internal/stack.h"
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(c++98-compat)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+//! Represents an in-memory output stream.
+/*!
+    \tparam Encoding Encoding of the stream.
+    \tparam Allocator type for allocating memory buffer.
+    \note implements Stream concept
+*/
+template <typename Encoding, typename Allocator = CrtAllocator>
+class GenericStringBuffer {
+public:
+    typedef typename Encoding::Ch Ch;
+
+    GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    GenericStringBuffer(GenericStringBuffer&& rhs) : stack_(std::move(rhs.stack_)) {}
+    GenericStringBuffer& operator=(GenericStringBuffer&& rhs) {
+        if (&rhs != this)
+            stack_ = std::move(rhs.stack_);
+        return *this;
+    }
+#endif
+
+    void Put(Ch c) { *stack_.template Push<Ch>() = c; }
+    void PutUnsafe(Ch c) { *stack_.template PushUnsafe<Ch>() = c; }
+    void Flush() {}
+
+    void Clear() { stack_.Clear(); }
+    void ShrinkToFit() {
+        // Push and pop a null terminator. This is safe.
+        *stack_.template Push<Ch>() = '\0';
+        stack_.ShrinkToFit();
+        stack_.template Pop<Ch>(1);
+    }
+
+    void Reserve(size_t count) { stack_.template Reserve<Ch>(count); }
+    Ch* Push(size_t count) { return stack_.template Push<Ch>(count); }
+    Ch* PushUnsafe(size_t count) { return stack_.template PushUnsafe<Ch>(count); }
+    void Pop(size_t count) { stack_.template Pop<Ch>(count); }
+
+    const Ch* GetString() const {
+        // Push and pop a null terminator. This is safe.
+        *stack_.template Push<Ch>() = '\0';
+        stack_.template Pop<Ch>(1);
+
+        return stack_.template Bottom<Ch>();
+    }
+
+    //! Get the size of string in bytes in the string buffer.
+    size_t GetSize() const { return stack_.GetSize(); }
+
+    //! Get the length of string in Ch in the string buffer.
+    size_t GetLength() const { return stack_.GetSize() / sizeof(Ch); }
+
+    static const size_t kDefaultCapacity = 256;
+    mutable internal::Stack<Allocator> stack_;
+
+private:
+    // Prohibit copy constructor & assignment operator.
+    GenericStringBuffer(const GenericStringBuffer&);
+    GenericStringBuffer& operator=(const GenericStringBuffer&);
+};
+
+//! String buffer with UTF8 encoding
+typedef GenericStringBuffer<UTF8<> > StringBuffer;
+
+template<typename Encoding, typename Allocator>
+inline void PutReserve(GenericStringBuffer<Encoding, Allocator>& stream, size_t count) {
+    stream.Reserve(count);
+}
+
+template<typename Encoding, typename Allocator>
+inline void PutUnsafe(GenericStringBuffer<Encoding, Allocator>& stream, typename Encoding::Ch c) {
+    stream.PutUnsafe(c);
+}
+
+//! Implement specialized version of PutN() with memset() for better performance.
+template<>
+inline void PutN(GenericStringBuffer<UTF8<> >& stream, char c, size_t n) {
+    std::memset(stream.stack_.Push<char>(n), c, n * sizeof(c));
+}
+
+RAPIDJSON_NAMESPACE_END
+
+#if defined(__clang__)
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_STRINGBUFFER_H_
diff --git a/external/rapidjson/writer.h b/external/rapidjson/writer.h
new file mode 100644
index 0000000..e610ebb
--- /dev/null
+++ b/external/rapidjson/writer.h
@@ -0,0 +1,711 @@
+// Tencent is pleased to support the open source community by making RapidJSON available.
+// 
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed 
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_WRITER_H_
+#define RAPIDJSON_WRITER_H_
+
+#include "stream.h"
+#include "internal/meta.h"
+#include "internal/stack.h"
+#include "internal/strfunc.h"
+#include "internal/dtoa.h"
+#include "internal/itoa.h"
+#include "stringbuffer.h"
+#include <new>      // placement new
+
+#if defined(RAPIDJSON_SIMD) && defined(_MSC_VER)
+#include <intrin.h>
+#pragma intrinsic(_BitScanForward)
+#endif
+#ifdef RAPIDJSON_SSE42
+#include <nmmintrin.h>
+#elif defined(RAPIDJSON_SSE2)
+#include <emmintrin.h>
+#elif defined(RAPIDJSON_NEON)
+#include <arm_neon.h>
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4127) // conditional expression is constant
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(padded)
+RAPIDJSON_DIAG_OFF(unreachable-code)
+RAPIDJSON_DIAG_OFF(c++98-compat)
+#endif
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+// WriteFlag
+
+/*! \def RAPIDJSON_WRITE_DEFAULT_FLAGS 
+    \ingroup RAPIDJSON_CONFIG
+    \brief User-defined kWriteDefaultFlags definition.
+
+    User can define this as any \c WriteFlag combinations.
+*/
+#ifndef RAPIDJSON_WRITE_DEFAULT_FLAGS
+#define RAPIDJSON_WRITE_DEFAULT_FLAGS kWriteNoFlags
+#endif
+
+//! Combination of writeFlags
+enum WriteFlag {
+    kWriteNoFlags = 0,              //!< No flags are set.
+    kWriteValidateEncodingFlag = 1, //!< Validate encoding of JSON strings.
+    kWriteNanAndInfFlag = 2,        //!< Allow writing of Infinity, -Infinity and NaN.
+    kWriteDefaultFlags = RAPIDJSON_WRITE_DEFAULT_FLAGS  //!< Default write flags. Can be customized by defining RAPIDJSON_WRITE_DEFAULT_FLAGS
+};
+
+//! JSON writer
+/*! Writer implements the concept Handler.
+    It generates JSON text by events to an output os.
+
+    User may programmatically calls the functions of a writer to generate JSON text.
+
+    On the other side, a writer can also be passed to objects that generates events, 
+
+    for example Reader::Parse() and Document::Accept().
+
+    \tparam OutputStream Type of output stream.
+    \tparam SourceEncoding Encoding of source string.
+    \tparam TargetEncoding Encoding of output stream.
+    \tparam StackAllocator Type of allocator for allocating memory of stack.
+    \note implements Handler concept
+*/
+template<typename OutputStream, typename SourceEncoding = UTF8<>, typename TargetEncoding = UTF8<>, typename StackAllocator = CrtAllocator, unsigned writeFlags = kWriteDefaultFlags>
+class Writer {
+public:
+    typedef typename SourceEncoding::Ch Ch;
+
+    static const int kDefaultMaxDecimalPlaces = 324;
+
+    //! Constructor
+    /*! \param os Output stream.
+        \param stackAllocator User supplied allocator. If it is null, it will create a private one.
+        \param levelDepth Initial capacity of stack.
+    */
+    explicit
+    Writer(OutputStream& os, StackAllocator* stackAllocator = 0, size_t levelDepth = kDefaultLevelDepth) : 
+        os_(&os), level_stack_(stackAllocator, levelDepth * sizeof(Level)), maxDecimalPlaces_(kDefaultMaxDecimalPlaces), hasRoot_(false) {}
+
+    explicit
+    Writer(StackAllocator* allocator = 0, size_t levelDepth = kDefaultLevelDepth) :
+        os_(0), level_stack_(allocator, levelDepth * sizeof(Level)), maxDecimalPlaces_(kDefaultMaxDecimalPlaces), hasRoot_(false) {}
+
+#if RAPIDJSON_HAS_CXX11_RVALUE_REFS
+    Writer(Writer&& rhs) :
+        os_(rhs.os_), level_stack_(std::move(rhs.level_stack_)), maxDecimalPlaces_(rhs.maxDecimalPlaces_), hasRoot_(rhs.hasRoot_) {
+        rhs.os_ = 0;
+    }
+#endif
+
+    //! Reset the writer with a new stream.
+    /*!
+        This function reset the writer with a new stream and default settings,
+        in order to make a Writer object reusable for output multiple JSONs.
+
+        \param os New output stream.
+        \code
+        Writer<OutputStream> writer(os1);
+        writer.StartObject();
+        // ...
+        writer.EndObject();
+
+        writer.Reset(os2);
+        writer.StartObject();
+        // ...
+        writer.EndObject();
+        \endcode
+    */
+    void Reset(OutputStream& os) {
+        os_ = &os;
+        hasRoot_ = false;
+        level_stack_.Clear();
+    }
+
+    //! Checks whether the output is a complete JSON.
+    /*!
+        A complete JSON has a complete root object or array.
+    */
+    bool IsComplete() const {
+        return hasRoot_ && level_stack_.Empty();
+    }
+
+    int GetMaxDecimalPlaces() const {
+        return maxDecimalPlaces_;
+    }
+
+    //! Sets the maximum number of decimal places for double output.
+    /*!
+        This setting truncates the output with specified number of decimal places.
+
+        For example, 
+
+        \code
+        writer.SetMaxDecimalPlaces(3);
+        writer.StartArray();
+        writer.Double(0.12345);                 // "0.123"
+        writer.Double(0.0001);                  // "0.0"
+        writer.Double(1.234567890123456e30);    // "1.234567890123456e30" (do not truncate significand for positive exponent)
+        writer.Double(1.23e-4);                 // "0.0"                  (do truncate significand for negative exponent)
+        writer.EndArray();
+        \endcode
+
+        The default setting does not truncate any decimal places. You can restore to this setting by calling
+        \code
+        writer.SetMaxDecimalPlaces(Writer::kDefaultMaxDecimalPlaces);
+        \endcode
+    */
+    void SetMaxDecimalPlaces(int maxDecimalPlaces) {
+        maxDecimalPlaces_ = maxDecimalPlaces;
+    }
+
+    /*!@name Implementation of Handler
+        \see Handler
+    */
+    //@{
+
+    bool Null()                 { Prefix(kNullType);   return EndValue(WriteNull()); }
+    bool Bool(bool b)           { Prefix(b ? kTrueType : kFalseType); return EndValue(WriteBool(b)); }
+    bool Int(int i)             { Prefix(kNumberType); return EndValue(WriteInt(i)); }
+    bool Uint(unsigned u)       { Prefix(kNumberType); return EndValue(WriteUint(u)); }
+    bool Int64(int64_t i64)     { Prefix(kNumberType); return EndValue(WriteInt64(i64)); }
+    bool Uint64(uint64_t u64)   { Prefix(kNumberType); return EndValue(WriteUint64(u64)); }
+
+    //! Writes the given \c double value to the stream
+    /*!
+        \param d The value to be written.
+        \return Whether it is succeed.
+    */
+    bool Double(double d)       { Prefix(kNumberType); return EndValue(WriteDouble(d)); }
+
+    bool RawNumber(const Ch* str, SizeType length, bool copy = false) {
+        RAPIDJSON_ASSERT(str != 0);
+        (void)copy;
+        Prefix(kNumberType);
+        return EndValue(WriteString(str, length));
+    }
+
+    bool String(const Ch* str, SizeType length, bool copy = false) {
+        RAPIDJSON_ASSERT(str != 0);
+        (void)copy;
+        Prefix(kStringType);
+        return EndValue(WriteString(str, length));
+    }
+
+#if RAPIDJSON_HAS_STDSTRING
+    bool String(const std::basic_string<Ch>& str) {
+        return String(str.data(), SizeType(str.size()));
+    }
+#endif
+
+    bool StartObject() {
+        Prefix(kObjectType);
+        new (level_stack_.template Push<Level>()) Level(false);
+        return WriteStartObject();
+    }
+
+    bool Key(const Ch* str, SizeType length, bool copy = false) { return String(str, length, copy); }
+
+#if RAPIDJSON_HAS_STDSTRING
+    bool Key(const std::basic_string<Ch>& str)
+    {
+      return Key(str.data(), SizeType(str.size()));
+    }
+#endif
+	
+    bool EndObject(SizeType memberCount = 0) {
+        (void)memberCount;
+        RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level)); // not inside an Object
+        RAPIDJSON_ASSERT(!level_stack_.template Top<Level>()->inArray); // currently inside an Array, not Object
+        RAPIDJSON_ASSERT(0 == level_stack_.template Top<Level>()->valueCount % 2); // Object has a Key without a Value
+        level_stack_.template Pop<Level>(1);
+        return EndValue(WriteEndObject());
+    }
+
+    bool StartArray() {
+        Prefix(kArrayType);
+        new (level_stack_.template Push<Level>()) Level(true);
+        return WriteStartArray();
+    }
+
+    bool EndArray(SizeType elementCount = 0) {
+        (void)elementCount;
+        RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level));
+        RAPIDJSON_ASSERT(level_stack_.template Top<Level>()->inArray);
+        level_stack_.template Pop<Level>(1);
+        return EndValue(WriteEndArray());
+    }
+    //@}
+
+    /*! @name Convenience extensions */
+    //@{
+
+    //! Simpler but slower overload.
+    bool String(const Ch* const& str) { return String(str, internal::StrLen(str)); }
+    bool Key(const Ch* const& str) { return Key(str, internal::StrLen(str)); }
+    
+    //@}
+
+    //! Write a raw JSON value.
+    /*!
+        For user to write a stringified JSON as a value.
+
+        \param json A well-formed JSON value. It should not contain null character within [0, length - 1] range.
+        \param length Length of the json.
+        \param type Type of the root of json.
+    */
+    bool RawValue(const Ch* json, size_t length, Type type) {
+        RAPIDJSON_ASSERT(json != 0);
+        Prefix(type);
+        return EndValue(WriteRawValue(json, length));
+    }
+
+    //! Flush the output stream.
+    /*!
+        Allows the user to flush the output stream immediately.
+     */
+    void Flush() {
+        os_->Flush();
+    }
+
+protected:
+    //! Information for each nested level
+    struct Level {
+        Level(bool inArray_) : valueCount(0), inArray(inArray_) {}
+        size_t valueCount;  //!< number of values in this level
+        bool inArray;       //!< true if in array, otherwise in object
+    };
+
+    static const size_t kDefaultLevelDepth = 32;
+
+    bool WriteNull()  {
+        PutReserve(*os_, 4);
+        PutUnsafe(*os_, 'n'); PutUnsafe(*os_, 'u'); PutUnsafe(*os_, 'l'); PutUnsafe(*os_, 'l'); return true;
+    }
+
+    bool WriteBool(bool b)  {
+        if (b) {
+            PutReserve(*os_, 4);
+            PutUnsafe(*os_, 't'); PutUnsafe(*os_, 'r'); PutUnsafe(*os_, 'u'); PutUnsafe(*os_, 'e');
+        }
+        else {
+            PutReserve(*os_, 5);
+            PutUnsafe(*os_, 'f'); PutUnsafe(*os_, 'a'); PutUnsafe(*os_, 'l'); PutUnsafe(*os_, 's'); PutUnsafe(*os_, 'e');
+        }
+        return true;
+    }
+
+    bool WriteInt(int i) {
+        char buffer[11];
+        const char* end = internal::i32toa(i, buffer);
+        PutReserve(*os_, static_cast<size_t>(end - buffer));
+        for (const char* p = buffer; p != end; ++p)
+            PutUnsafe(*os_, static_cast<typename OutputStream::Ch>(*p));
+        return true;
+    }
+
+    bool WriteUint(unsigned u) {
+        char buffer[10];
+        const char* end = internal::u32toa(u, buffer);
+        PutReserve(*os_, static_cast<size_t>(end - buffer));
+        for (const char* p = buffer; p != end; ++p)
+            PutUnsafe(*os_, static_cast<typename OutputStream::Ch>(*p));
+        return true;
+    }
+
+    bool WriteInt64(int64_t i64) {
+        char buffer[21];
+        const char* end = internal::i64toa(i64, buffer);
+        PutReserve(*os_, static_cast<size_t>(end - buffer));
+        for (const char* p = buffer; p != end; ++p)
+            PutUnsafe(*os_, static_cast<typename OutputStream::Ch>(*p));
+        return true;
+    }
+
+    bool WriteUint64(uint64_t u64) {
+        char buffer[20];
+        char* end = internal::u64toa(u64, buffer);
+        PutReserve(*os_, static_cast<size_t>(end - buffer));
+        for (char* p = buffer; p != end; ++p)
+            PutUnsafe(*os_, static_cast<typename OutputStream::Ch>(*p));
+        return true;
+    }
+
+    bool WriteDouble(double d) {
+        if (internal::Double(d).IsNanOrInf()) {
+            if (!(writeFlags & kWriteNanAndInfFlag))
+                return false;
+            if (internal::Double(d).IsNan()) {
+                PutReserve(*os_, 3);
+                PutUnsafe(*os_, 'N'); PutUnsafe(*os_, 'a'); PutUnsafe(*os_, 'N');
+                return true;
+            }
+            if (internal::Double(d).Sign()) {
+                PutReserve(*os_, 9);
+                PutUnsafe(*os_, '-');
+            }
+            else
+                PutReserve(*os_, 8);
+            PutUnsafe(*os_, 'I'); PutUnsafe(*os_, 'n'); PutUnsafe(*os_, 'f');
+            PutUnsafe(*os_, 'i'); PutUnsafe(*os_, 'n'); PutUnsafe(*os_, 'i'); PutUnsafe(*os_, 't'); PutUnsafe(*os_, 'y');
+            return true;
+        }
+
+        char buffer[25];
+        char* end = internal::dtoa(d, buffer, maxDecimalPlaces_);
+        PutReserve(*os_, static_cast<size_t>(end - buffer));
+        for (char* p = buffer; p != end; ++p)
+            PutUnsafe(*os_, static_cast<typename OutputStream::Ch>(*p));
+        return true;
+    }
+
+    bool WriteString(const Ch* str, SizeType length)  {
+        static const typename OutputStream::Ch hexDigits[16] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+        static const char escape[256] = {
+#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+            //0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F
+            'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'b', 't', 'n', 'u', 'f', 'r', 'u', 'u', // 00
+            'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', // 10
+              0,   0, '"',   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0, // 20
+            Z16, Z16,                                                                       // 30~4F
+              0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,'\\',   0,   0,   0, // 50
+            Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16                                // 60~FF
+#undef Z16
+        };
+
+        if (TargetEncoding::supportUnicode)
+            PutReserve(*os_, 2 + length * 6); // "\uxxxx..."
+        else
+            PutReserve(*os_, 2 + length * 12);  // "\uxxxx\uyyyy..."
+
+        PutUnsafe(*os_, '\"');
+        GenericStringStream<SourceEncoding> is(str);
+        while (ScanWriteUnescapedString(is, length)) {
+            const Ch c = is.Peek();
+            if (!TargetEncoding::supportUnicode && static_cast<unsigned>(c) >= 0x80) {
+                // Unicode escaping
+                unsigned codepoint;
+                if (RAPIDJSON_UNLIKELY(!SourceEncoding::Decode(is, &codepoint)))
+                    return false;
+                PutUnsafe(*os_, '\\');
+                PutUnsafe(*os_, 'u');
+                if (codepoint <= 0xD7FF || (codepoint >= 0xE000 && codepoint <= 0xFFFF)) {
+                    PutUnsafe(*os_, hexDigits[(codepoint >> 12) & 15]);
+                    PutUnsafe(*os_, hexDigits[(codepoint >>  8) & 15]);
+                    PutUnsafe(*os_, hexDigits[(codepoint >>  4) & 15]);
+                    PutUnsafe(*os_, hexDigits[(codepoint      ) & 15]);
+                }
+                else {
+                    RAPIDJSON_ASSERT(codepoint >= 0x010000 && codepoint <= 0x10FFFF);
+                    // Surrogate pair
+                    unsigned s = codepoint - 0x010000;
+                    unsigned lead = (s >> 10) + 0xD800;
+                    unsigned trail = (s & 0x3FF) + 0xDC00;
+                    PutUnsafe(*os_, hexDigits[(lead >> 12) & 15]);
+                    PutUnsafe(*os_, hexDigits[(lead >>  8) & 15]);
+                    PutUnsafe(*os_, hexDigits[(lead >>  4) & 15]);
+                    PutUnsafe(*os_, hexDigits[(lead      ) & 15]);
+                    PutUnsafe(*os_, '\\');
+                    PutUnsafe(*os_, 'u');
+                    PutUnsafe(*os_, hexDigits[(trail >> 12) & 15]);
+                    PutUnsafe(*os_, hexDigits[(trail >>  8) & 15]);
+                    PutUnsafe(*os_, hexDigits[(trail >>  4) & 15]);
+                    PutUnsafe(*os_, hexDigits[(trail      ) & 15]);                    
+                }
+            }
+            else if ((sizeof(Ch) == 1 || static_cast<unsigned>(c) < 256) && RAPIDJSON_UNLIKELY(escape[static_cast<unsigned char>(c)]))  {
+                is.Take();
+                PutUnsafe(*os_, '\\');
+                PutUnsafe(*os_, static_cast<typename OutputStream::Ch>(escape[static_cast<unsigned char>(c)]));
+                if (escape[static_cast<unsigned char>(c)] == 'u') {
+                    PutUnsafe(*os_, '0');
+                    PutUnsafe(*os_, '0');
+                    PutUnsafe(*os_, hexDigits[static_cast<unsigned char>(c) >> 4]);
+                    PutUnsafe(*os_, hexDigits[static_cast<unsigned char>(c) & 0xF]);
+                }
+            }
+            else if (RAPIDJSON_UNLIKELY(!(writeFlags & kWriteValidateEncodingFlag ? 
+                Transcoder<SourceEncoding, TargetEncoding>::Validate(is, *os_) :
+                Transcoder<SourceEncoding, TargetEncoding>::TranscodeUnsafe(is, *os_))))
+                return false;
+        }
+        PutUnsafe(*os_, '\"');
+        return true;
+    }
+
+    bool ScanWriteUnescapedString(GenericStringStream<SourceEncoding>& is, size_t length) {
+        return RAPIDJSON_LIKELY(is.Tell() < length);
+    }
+
+    bool WriteStartObject() { os_->Put('{'); return true; }
+    bool WriteEndObject()   { os_->Put('}'); return true; }
+    bool WriteStartArray()  { os_->Put('['); return true; }
+    bool WriteEndArray()    { os_->Put(']'); return true; }
+
+    bool WriteRawValue(const Ch* json, size_t length) {
+        PutReserve(*os_, length);
+        for (size_t i = 0; i < length; i++) {
+            RAPIDJSON_ASSERT(json[i] != '\0');
+            PutUnsafe(*os_, json[i]);
+        }
+        return true;
+    }
+
+    void Prefix(Type type) {
+        (void)type;
+        if (RAPIDJSON_LIKELY(level_stack_.GetSize() != 0)) { // this value is not at root
+            Level* level = level_stack_.template Top<Level>();
+            if (level->valueCount > 0) {
+                if (level->inArray) 
+                    os_->Put(','); // add comma if it is not the first element in array
+                else  // in object
+                    os_->Put((level->valueCount % 2 == 0) ? ',' : ':');
+            }
+            if (!level->inArray && level->valueCount % 2 == 0)
+                RAPIDJSON_ASSERT(type == kStringType);  // if it's in object, then even number should be a name
+            level->valueCount++;
+        }
+        else {
+            RAPIDJSON_ASSERT(!hasRoot_);    // Should only has one and only one root.
+            hasRoot_ = true;
+        }
+    }
+
+    // Flush the value if it is the top level one.
+    bool EndValue(bool ret) {
+        if (RAPIDJSON_UNLIKELY(level_stack_.Empty()))   // end of json text
+            Flush();
+        return ret;
+    }
+
+    OutputStream* os_;
+    internal::Stack<StackAllocator> level_stack_;
+    int maxDecimalPlaces_;
+    bool hasRoot_;
+
+private:
+    // Prohibit copy constructor & assignment operator.
+    Writer(const Writer&);
+    Writer& operator=(const Writer&);
+};
+
+// Full specialization for StringStream to prevent memory copying
+
+template<>
+inline bool Writer<StringBuffer>::WriteInt(int i) {
+    char *buffer = os_->Push(11);
+    const char* end = internal::i32toa(i, buffer);
+    os_->Pop(static_cast<size_t>(11 - (end - buffer)));
+    return true;
+}
+
+template<>
+inline bool Writer<StringBuffer>::WriteUint(unsigned u) {
+    char *buffer = os_->Push(10);
+    const char* end = internal::u32toa(u, buffer);
+    os_->Pop(static_cast<size_t>(10 - (end - buffer)));
+    return true;
+}
+
+template<>
+inline bool Writer<StringBuffer>::WriteInt64(int64_t i64) {
+    char *buffer = os_->Push(21);
+    const char* end = internal::i64toa(i64, buffer);
+    os_->Pop(static_cast<size_t>(21 - (end - buffer)));
+    return true;
+}
+
+template<>
+inline bool Writer<StringBuffer>::WriteUint64(uint64_t u) {
+    char *buffer = os_->Push(20);
+    const char* end = internal::u64toa(u, buffer);
+    os_->Pop(static_cast<size_t>(20 - (end - buffer)));
+    return true;
+}
+
+template<>
+inline bool Writer<StringBuffer>::WriteDouble(double d) {
+    if (internal::Double(d).IsNanOrInf()) {
+        // Note: This code path can only be reached if (RAPIDJSON_WRITE_DEFAULT_FLAGS & kWriteNanAndInfFlag).
+        if (!(kWriteDefaultFlags & kWriteNanAndInfFlag))
+            return false;
+        if (internal::Double(d).IsNan()) {
+            PutReserve(*os_, 3);
+            PutUnsafe(*os_, 'N'); PutUnsafe(*os_, 'a'); PutUnsafe(*os_, 'N');
+            return true;
+        }
+        if (internal::Double(d).Sign()) {
+            PutReserve(*os_, 9);
+            PutUnsafe(*os_, '-');
+        }
+        else
+            PutReserve(*os_, 8);
+        PutUnsafe(*os_, 'I'); PutUnsafe(*os_, 'n'); PutUnsafe(*os_, 'f');
+        PutUnsafe(*os_, 'i'); PutUnsafe(*os_, 'n'); PutUnsafe(*os_, 'i'); PutUnsafe(*os_, 't'); PutUnsafe(*os_, 'y');
+        return true;
+    }
+    
+    char *buffer = os_->Push(25);
+    char* end = internal::dtoa(d, buffer, maxDecimalPlaces_);
+    os_->Pop(static_cast<size_t>(25 - (end - buffer)));
+    return true;
+}
+
+#if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42)
+template<>
+inline bool Writer<StringBuffer>::ScanWriteUnescapedString(StringStream& is, size_t length) {
+    if (length < 16)
+        return RAPIDJSON_LIKELY(is.Tell() < length);
+
+    if (!RAPIDJSON_LIKELY(is.Tell() < length))
+        return false;
+
+    const char* p = is.src_;
+    const char* end = is.head_ + length;
+    const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+    const char* endAligned = reinterpret_cast<const char*>(reinterpret_cast<size_t>(end) & static_cast<size_t>(~15));
+    if (nextAligned > end)
+        return true;
+
+    while (p != nextAligned)
+        if (*p < 0x20 || *p == '\"' || *p == '\\') {
+            is.src_ = p;
+            return RAPIDJSON_LIKELY(is.Tell() < length);
+        }
+        else
+            os_->PutUnsafe(*p++);
+
+    // The rest of string using SIMD
+    static const char dquote[16] = { '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"' };
+    static const char bslash[16] = { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' };
+    static const char space[16]  = { 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F };
+    const __m128i dq = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&dquote[0]));
+    const __m128i bs = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&bslash[0]));
+    const __m128i sp = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&space[0]));
+
+    for (; p != endAligned; p += 16) {
+        const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
+        const __m128i t1 = _mm_cmpeq_epi8(s, dq);
+        const __m128i t2 = _mm_cmpeq_epi8(s, bs);
+        const __m128i t3 = _mm_cmpeq_epi8(_mm_max_epu8(s, sp), sp); // s < 0x20 <=> max(s, 0x1F) == 0x1F
+        const __m128i x = _mm_or_si128(_mm_or_si128(t1, t2), t3);
+        unsigned short r = static_cast<unsigned short>(_mm_movemask_epi8(x));
+        if (RAPIDJSON_UNLIKELY(r != 0)) {   // some of characters is escaped
+            SizeType len;
+#ifdef _MSC_VER         // Find the index of first escaped
+            unsigned long offset;
+            _BitScanForward(&offset, r);
+            len = offset;
+#else
+            len = static_cast<SizeType>(__builtin_ffs(r) - 1);
+#endif
+            char* q = reinterpret_cast<char*>(os_->PushUnsafe(len));
+            for (size_t i = 0; i < len; i++)
+                q[i] = p[i];
+
+            p += len;
+            break;
+        }
+        _mm_storeu_si128(reinterpret_cast<__m128i *>(os_->PushUnsafe(16)), s);
+    }
+
+    is.src_ = p;
+    return RAPIDJSON_LIKELY(is.Tell() < length);
+}
+#elif defined(RAPIDJSON_NEON)
+template<>
+inline bool Writer<StringBuffer>::ScanWriteUnescapedString(StringStream& is, size_t length) {
+    if (length < 16)
+        return RAPIDJSON_LIKELY(is.Tell() < length);
+
+    if (!RAPIDJSON_LIKELY(is.Tell() < length))
+        return false;
+
+    const char* p = is.src_;
+    const char* end = is.head_ + length;
+    const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
+    const char* endAligned = reinterpret_cast<const char*>(reinterpret_cast<size_t>(end) & static_cast<size_t>(~15));
+    if (nextAligned > end)
+        return true;
+
+    while (p != nextAligned)
+        if (*p < 0x20 || *p == '\"' || *p == '\\') {
+            is.src_ = p;
+            return RAPIDJSON_LIKELY(is.Tell() < length);
+        }
+        else
+            os_->PutUnsafe(*p++);
+
+    // The rest of string using SIMD
+    const uint8x16_t s0 = vmovq_n_u8('"');
+    const uint8x16_t s1 = vmovq_n_u8('\\');
+    const uint8x16_t s2 = vmovq_n_u8('\b');
+    const uint8x16_t s3 = vmovq_n_u8(32);
+
+    for (; p != endAligned; p += 16) {
+        const uint8x16_t s = vld1q_u8(reinterpret_cast<const uint8_t *>(p));
+        uint8x16_t x = vceqq_u8(s, s0);
+        x = vorrq_u8(x, vceqq_u8(s, s1));
+        x = vorrq_u8(x, vceqq_u8(s, s2));
+        x = vorrq_u8(x, vcltq_u8(s, s3));
+
+        x = vrev64q_u8(x);                     // Rev in 64
+        uint64_t low = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 0);   // extract
+        uint64_t high = vgetq_lane_u64(reinterpret_cast<uint64x2_t>(x), 1);  // extract
+
+        SizeType len = 0;
+        bool escaped = false;
+        if (low == 0) {
+            if (high != 0) {
+                unsigned lz = (unsigned)__builtin_clzll(high);
+                len = 8 + (lz >> 3);
+                escaped = true;
+            }
+        } else {
+            unsigned lz = (unsigned)__builtin_clzll(low);
+            len = lz >> 3;
+            escaped = true;
+        }
+        if (RAPIDJSON_UNLIKELY(escaped)) {   // some of characters is escaped
+            char* q = reinterpret_cast<char*>(os_->PushUnsafe(len));
+            for (size_t i = 0; i < len; i++)
+                q[i] = p[i];
+
+            p += len;
+            break;
+        }
+        vst1q_u8(reinterpret_cast<uint8_t *>(os_->PushUnsafe(16)), s);
+    }
+
+    is.src_ = p;
+    return RAPIDJSON_LIKELY(is.Tell() < length);
+}
+#endif // RAPIDJSON_NEON
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_RAPIDJSON_H_
diff --git a/include/GlobalLib.hpp b/include/GlobalLib.hpp
index b098543..e0cc25c 100644
--- a/include/GlobalLib.hpp
+++ b/include/GlobalLib.hpp
@@ -17,6 +17,7 @@ namespace sibs
             DEPENDENCY_VERSION_NO_MATCH = 20
         };
 
+        static Result<bool> getLibs(const std::vector<Dependency> &libs, const SibsConfig &parentConfig, const FileString &globalLibRootDir, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc, GlobalIncludeDirCallbackFunc globalIncludeDirCallback);
         static Result<bool> validatePackageExists(const FileString &globalLibRootDir, const std::string &name);
         static Result<bool> getLibsLinkerFlags(const SibsConfig &parentConfig, const FileString &globalLibRootDir, const std::string &name, const std::string &version, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc, GlobalIncludeDirCallbackFunc globalIncludeDirCallback);
         static Result<bool> downloadDependency(const Dependency &dependency);
diff --git a/include/Package.hpp b/include/Package.hpp
index 106a48d..475e11b 100644
--- a/include/Package.hpp
+++ b/include/Package.hpp
@@ -1,6 +1,10 @@
 #ifndef SIBS_PACKAGE_HPP
 #define SIBS_PACKAGE_HPP
 
+#include "../external/rapidjson/document.h"
+#include "Result.hpp"
+#include <string>
+
 namespace sibs
 {
     enum class PackageType : int
@@ -20,6 +24,23 @@ namespace sibs
         // Identical to DYNAMIC
         LIBRARY
     };
+    
+    class Package
+    {
+    public:
+        /*
+         * Get package list from url which contains json file.
+         * Returns json document structure (rapidjson)
+         */
+        static Result<rapidjson::Document*> getPackageList(const char *url);
+        
+        /*
+         * Return the first url in list.
+         * TODO: If we fail to fetch package from first url, try other other ones in the list (or if the first url is too slow / takes too long to respond).
+         * TODO: Add version matching with wildcard etc. If we specify "1.2.*", then it should get the latest version that matches; etc...
+         */
+        static Result<std::string> getPackageUrl(const char *packageName, const char *packageVersion);
+    };
 }
 
 #endif //SIBS_PACKAGE_HPP
diff --git a/include/PkgConfig.hpp b/include/PkgConfig.hpp
index da78b91..e525843 100644
--- a/include/PkgConfig.hpp
+++ b/include/PkgConfig.hpp
@@ -13,6 +13,7 @@ namespace sibs
     class PkgConfig
     {
     public:
+        static Result<bool> validatePkgConfigPackageVersionExists(const Dependency &dependency);
         static Result<bool> validatePackageExists(const std::string &name);
         static Result<bool> validatePackageVersionAtLeast(const std::string &name, const std::string &version);
         static Result<std::string> getDynamicLibsLinkerFlags(const std::vector<Dependency> &libs);
diff --git a/project.conf b/project.conf
index 2c3f04c..93665a5 100644
--- a/project.conf
+++ b/project.conf
@@ -10,4 +10,3 @@ ignore_dirs = ["cmake"]
 [dependencies]
 libcurl = "7.57.0"
 libarchive = "3.3.2"
-rapidjson = "1.1.0"
diff --git a/src/CmakeModule.cpp b/src/CmakeModule.cpp
index 7d5509c..d82eaf6 100644
--- a/src/CmakeModule.cpp
+++ b/src/CmakeModule.cpp
@@ -1,6 +1,7 @@
 #include "../include/CmakeModule.hpp"
 #include "../include/Exec.hpp"
 #include "../include/GlobalLib.hpp"
+#include "../include/PkgConfig.hpp"
 
 #if OS_FAMILY == OS_FAMILY_POSIX
 #define nprintf printf
@@ -23,42 +24,86 @@ namespace sibs
         if(createGlobalLibDirResult.isErr())
             return createGlobalLibDirResult;
         
+// TODO: This code was copied from Ninja.cpp, convert it to work for CMake
+#if OS_TYPE == OS_TYPE_LINUX
+        // TODO: Allow configuring default linking flags. Maybe have `package.useThreads = false` to disable this flag
+        string allLinkerFlags = "-pthread";
+#else
+        string allLinkerFlags = "";
+#endif
+
+#if 0
+        // TODO: Somehow check loading order, because it has to be correct to work.. Or does it for dynamic libraries?
+        // Anyways it's required for static libraries (especially on Windows)
+        for (const string &binaryDependency : binaryDependencies)
+        {
+            allLinkerFlags += " ";
+            allLinkerFlags += binaryDependency;
+        }
+#endif
+        if (!staticLinkerFlagCallbackFunc || (config.getPackageType() == PackageType::DYNAMIC || config.getPackageType() == PackageType::LIBRARY))
+        {
+            staticLinkerFlagCallbackFunc = [&allLinkerFlags](const string &linkerFlag)
+            {
+                allLinkerFlags += " ";
+                allLinkerFlags += linkerFlag;
+            };
+        }
+
+        // TODO: If project contains no source files, then we shouldn't override this function
+        dynamicLinkerFlagCallbackFunc = [&allLinkerFlags](const string &linkerFlag)
+        {
+            allLinkerFlags += " ";
+            allLinkerFlags += linkerFlag;
+        };
+        
         // TODO: Create a cmake module that contains library/include path for the dependencies (https://cmake.org/Wiki/CMake:How_To_Find_Libraries).
         // Modify the project CMakeLists.txt and add: list(APPEND CMAKE_MODULE_PATH "PathToDependenciesCmakeModulesGoesHere").
         // CMakeLists.txt may contain: set(CMAKE_MODULE_PATH "PathToModules"). This needs to be replaced with list append,
         // otherwise our added module path is replaced.
         // It may work to do like vcpkg instead - to use -DCMAKE_TOOLCHAIN_FILE program argument to specify path to script (https://github.com/Microsoft/vcpkg/blob/master/docs/examples/using-sqlite.md)
-        for(const Dependency &globalLibDependency : config.getDependencies())
+        vector<Dependency> globalLibDependencies;
+#if OS_FAMILY == OS_FAMILY_POSIX
+        vector<Dependency> pkgConfigDependencies;
+        for(const Dependency &dependency : config.getDependencies())
         {
-            Result<bool> globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(config, globalLibDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallbackFunc, globalIncludeDirCallback);
-            if(globalLibLinkerFlagsResult.isErr())
+            Result<bool> pkgConfigDependencyValidation = PkgConfig::validatePkgConfigPackageVersionExists(dependency);
+            if(pkgConfigDependencyValidation.isOk())
             {
-                if(globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_NOT_FOUND || globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_VERSION_NO_MATCH)
-                {
-                    printf("Dependency not found in global lib, trying to download from github\n");
-                    // TODO: Download several dependencies at the same time by adding them to a list
-                    // and then iterate them and download them all using several threads.
-                    // All dependecies should be downloaded at the same time, this includes dependencies of dependencies.
-                    // If a dependency is missing, fail build BEFORE downloading dependencies and before compiling anything.
-                    // You do not want to possibly wait several minutes only for build to fail when there is no compilation error.
-
-                    // TODO: If return error is invalid url, then the message should be converted to
-                    // invalid package name/version. A check should be done if it is the name or version
-                    // that is invalid.
-                    Result<bool> downloadDependencyResult = GlobalLib::downloadDependency(globalLibDependency);
-                    if(downloadDependencyResult.isErr())
-                        return downloadDependencyResult;
+                pkgConfigDependencies.push_back(dependency);
+            }
+            else
+            {
+                globalLibDependencies.push_back(dependency);
+            }
+        }
 
-                    globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(config, globalLibDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallbackFunc, globalIncludeDirCallback);
-                    if(globalLibLinkerFlagsResult.isErr())
-                        return Result<bool>::Err(globalLibLinkerFlagsResult);
-                }
-                else
-                {
-                    return Result<bool>::Err(globalLibLinkerFlagsResult);
-                }
+        Result<string> pkgConfigLinkerFlagsResult = PkgConfig::getDynamicLibsLinkerFlags(pkgConfigDependencies);
+        if (pkgConfigLinkerFlagsResult.isErr())
+        {
+            printf("%s, using global lib...\n", pkgConfigLinkerFlagsResult.getErrMsg().c_str());
+            globalLibDependencies.reserve(globalLibDependencies.size() + pkgConfigDependencies.size());
+            for (const Dependency &pkgConfigDependency : pkgConfigDependencies)
+            {
+                globalLibDependencies.push_back(pkgConfigDependency);
             }
+            pkgConfigDependencies.clear();
         }
+        else
+        {
+            if (!pkgConfigLinkerFlagsResult.unwrap().empty())
+                dynamicLinkerFlagCallbackFunc(pkgConfigLinkerFlagsResult.unwrap());
+        }
+#else
+        for (const Dependency &dependency : dependencies)
+        {
+            globalLibDependencies.push_back(dependency);
+        }
+#endif
+
+        Result<bool> globalLibResult = GlobalLib::getLibs(globalLibDependencies, config, globalLibDir, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallbackFunc, globalIncludeDirCallback);
+        if(!globalLibResult)
+            return globalLibResult;
             
         Result<bool> createBuildDirResult = createDirectoryRecursive(buildPath.c_str());
         if (createBuildDirResult.isErr())
diff --git a/src/GlobalLib.cpp b/src/GlobalLib.cpp
index d3131a1..0256685 100644
--- a/src/GlobalLib.cpp
+++ b/src/GlobalLib.cpp
@@ -64,6 +64,43 @@ namespace sibs
     {
         return _tinydir_strncmp(path, subPathOf.c_str(), subPathOf.size()) == 0;
     }
+    
+    Result<bool> GlobalLib::getLibs(const std::vector<Dependency> &libs, const SibsConfig &parentConfig, const FileString &globalLibRootDir, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc, GlobalIncludeDirCallbackFunc globalIncludeDirCallback)
+    {
+        for(const Dependency &globalLibDependency : libs)
+        {
+            printf("Dependency %s is missing from pkg-config, trying global lib\n", globalLibDependency.name.c_str());
+            Result<bool> globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(parentConfig, globalLibRootDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallbackFunc, globalIncludeDirCallback);
+            if(globalLibLinkerFlagsResult.isErr())
+            {
+                if(globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_NOT_FOUND || globalLibLinkerFlagsResult.getErrorCode() == GlobalLib::DependencyError::DEPENDENCY_VERSION_NO_MATCH)
+                {
+                    printf("Dependency not found in global lib, trying to download from github\n");
+                    // TODO: Download several dependencies at the same time by adding them to a list
+                    // and then iterate them and download them all using several threads.
+                    // All dependecies should be downloaded at the same time, this includes dependencies of dependencies.
+                    // If a dependency is missing, fail build BEFORE downloading dependencies and before compiling anything.
+                    // You do not want to possibly wait several minutes only for build to fail when there is no compilation error.
+
+                    // TODO: If return error is invalid url, then the message should be converted to
+                    // invalid package name/version. A check should be done if it is the name or version
+                    // that is invalid.
+                    Result<bool> downloadDependencyResult = GlobalLib::downloadDependency(globalLibDependency);
+                    if(downloadDependencyResult.isErr())
+                        return downloadDependencyResult;
+
+                    globalLibLinkerFlagsResult = GlobalLib::getLibsLinkerFlags(parentConfig, globalLibRootDir, globalLibDependency.name, globalLibDependency.version, staticLinkerFlagCallbackFunc, dynamicLinkerFlagCallbackFunc, globalIncludeDirCallback);
+                    if(globalLibLinkerFlagsResult.isErr())
+                        return Result<bool>::Err(globalLibLinkerFlagsResult);
+                }
+                else
+                {
+                    return Result<bool>::Err(globalLibLinkerFlagsResult);
+                }
+            }
+        }
+        return Result<bool>::Ok(true);
+    }
 
     Result<bool> GlobalLib::getLibsLinkerFlags(const SibsConfig &parentConfig, const FileString &globalLibRootDir, const std::string &name, const std::string &version, LinkerFlagCallbackFunc staticLinkerFlagCallbackFunc, LinkerFlagCallbackFunc dynamicLinkerFlagCallbackFunc, GlobalIncludeDirCallbackFunc globalIncludeDirCallback)
     {
@@ -281,11 +318,11 @@ namespace sibs
 
     Result<bool> GlobalLib::downloadDependency(const Dependency &dependency)
     {
-        string url = "https://github.com/DEC05EBA/";
-        url += dependency.name;
-        url += "/archive/";
-        url += dependency.version;
-        url += ".tar.gz";
+        Result<string> packageUrlResult = Package::getPackageUrl(dependency.name.c_str(), dependency.version.c_str());
+        if(!packageUrlResult)
+            return Result<bool>::Err(packageUrlResult);
+        
+        const string &url = packageUrlResult.unwrap();
 
         Result<FileString> libPathResult = getHomeDir();
         if (!libPathResult)
diff --git a/src/Package.cpp b/src/Package.cpp
new file mode 100644
index 0000000..c1c00be
--- /dev/null
+++ b/src/Package.cpp
@@ -0,0 +1,114 @@
+#include "../include/Package.hpp"
+#include "../include/curl.hpp"
+#include "../external/rapidjson/error/en.h"
+
+using namespace std;
+using namespace rapidjson;
+
+static Document *packageList = nullptr;
+
+namespace sibs
+{
+    // TODO: Always downloading is fine right now because the package list is small. This should later be modified to use local cache.
+    // The package file should be stored locally (at ~/.sibs/packages.json) and the version file should also be stored.
+    // First we check if the version is incorrect and if it, we download the new packages.json file.
+    // We should only check if the package list is up to date once every 10 minute or so (make it configurable in a config file?)
+    // to improve build performance and reduce server load.
+    // Or maybe we dont have to do that at all....
+    Result<Document*> Package::getPackageList(const char *url)
+    {
+        if(packageList)
+            return Result<Document*>::Ok(packageList);
+        
+        HttpResult httpResult = curl::get(url);
+        if(!httpResult.success)
+            return Result<Document*>::Err(httpResult.str, httpResult.httpCode);
+        
+        Document *doc = new Document();
+        ParseResult parseResult = doc->Parse(httpResult.str.c_str());
+        if(!parseResult)
+        {
+            string errMsg = "Failed to parse package list json file: ";
+            errMsg += GetParseError_En(parseResult.Code());
+            errMsg += " (";
+            errMsg += to_string(parseResult.Offset());
+            errMsg += ")";
+            return Result<Document*>::Err(errMsg);
+        }
+        
+        packageList = doc;
+        return Result<Document*>::Ok(packageList);
+    }
+    
+    Result<string> Package::getPackageUrl(const char *packageName, const char *packageVersion)
+    {
+        Result<Document*> packageList = Package::getPackageList("https://raw.githubusercontent.com/DEC05EBA/sibs_packages/master/packages.json");
+        if(!packageList)
+            return Result<string>::Err(packageList);
+        
+        const Document &packageDoc = *packageList.unwrap();
+        const Value &packageMetaData = packageDoc[packageName];
+        if(!packageMetaData.IsObject())
+        {
+            string errMsg = "No package with the name \"";
+            errMsg += packageName;
+            errMsg += "\" was found";
+            return Result<string>::Err(errMsg);
+        }
+        
+        const Value &packageVersions = packageMetaData["versions"];
+        if(!packageVersions.IsObject())
+        {
+            string errMsg = "Package file is corrupt. ";
+            errMsg += packageName;
+            errMsg += ".versions is not a json object";
+            return Result<string>::Err("errMsg");
+        }
+        
+        const Value &package = packageVersions[packageVersion];
+        if(!package.IsObject())
+        {
+            string errMsg = "Package file is corrupt. ";
+            errMsg += packageName;
+            errMsg += ".versions.";
+            errMsg += packageVersion;
+            errMsg += " is not a json object";
+            return Result<string>::Err(errMsg);
+        }
+        
+        const Value &packageUrlsValue = package["urls"];
+        if(!packageUrlsValue.IsArray())
+        {
+            string errMsg = "Package file is corrupt. ";
+            errMsg += packageName;
+            errMsg += ".versions.";
+            errMsg += packageVersion;
+            errMsg += ".urls is not a json array";
+            return Result<string>::Err(errMsg);
+        }
+        
+        auto packageUrls = packageUrlsValue.GetArray();
+        if(packageUrls.Empty())
+        {
+            string errMsg = "Package file is corrupt. ";
+            errMsg += packageName;
+            errMsg += ".versions.";
+            errMsg += packageVersion;
+            errMsg += ".urls is an empty json array";
+            return Result<string>::Err(errMsg);
+        }
+        
+        const Value &packageUrlValue = packageUrls[0];
+        if(!packageUrlValue.IsString())
+        {
+            string errMsg = "Package file is corrupt. ";
+            errMsg += packageName;
+            errMsg += ".versions.";
+            errMsg += packageVersion;
+            errMsg += ".urls[0] is not a string";
+            return Result<string>::Err(errMsg);
+        }
+        
+        return Result<std::string>::Ok(string(packageUrlValue.GetString(), packageUrlValue.GetStringLength()));
+    }
+}
diff --git a/src/PkgConfig.cpp b/src/PkgConfig.cpp
index a66d5b3..f9f8f9b 100644
--- a/src/PkgConfig.cpp
+++ b/src/PkgConfig.cpp
@@ -18,6 +18,21 @@ namespace sibs
         }
         return input;
     }
+    
+#if OS_FAMILY == OS_FAMILY_POSIX
+    Result<bool> PkgConfig::validatePkgConfigPackageVersionExists(const Dependency &dependency)
+    {
+        Result<bool> dependencyValidationResult = PkgConfig::validatePackageExists(dependency.name);
+        if(dependencyValidationResult.isErr())
+            return Result<bool>::Err(dependencyValidationResult.getErrMsg());
+
+        Result<bool> dependencyVersionValidationResult = PkgConfig::validatePackageVersionAtLeast(dependency.name, dependency.version);
+        if(dependencyVersionValidationResult.isErr())
+            return Result<bool>::Err(dependencyVersionValidationResult.getErrMsg());
+
+        return Result<bool>::Ok(true);
+    }
+#endif
 
     Result<bool> PkgConfig::validatePackageExists(const string &name)
     {