From 84984bdfd0273b789e0c9bfe397440dd6912912d Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Tue, 13 Apr 2021 05:39:25 +0200
Subject: Include cppcodec instead of using it a system library. Its not
 available in ubuntu repos for example

---
 external/cppcodec/detail/base64.hpp | 132 ++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 external/cppcodec/detail/base64.hpp

(limited to 'external/cppcodec/detail/base64.hpp')

diff --git a/external/cppcodec/detail/base64.hpp b/external/cppcodec/detail/base64.hpp
new file mode 100644
index 0000000..b6db6d7
--- /dev/null
+++ b/external/cppcodec/detail/base64.hpp
@@ -0,0 +1,132 @@
+/**
+ *  Copyright (C) 2015 Topology LP
+ *  Copyright (C) 2013 Adam Rudd (bit calculations)
+ *  Copyright (C) 2018 Jakob Petsovits
+ *  All rights reserved.
+ *
+ *  Permission is hereby granted, free of charge, to any person obtaining a copy
+ *  of this software and associated documentation files (the "Software"), to
+ *  deal in the Software without restriction, including without limitation the
+ *  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ *  sell copies of the Software, and to permit persons to whom the Software is
+ *  furnished to do so, subject to the following conditions:
+ *
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ *  IN THE SOFTWARE.
+ *
+ *  Bit calculations adapted from https://github.com/adamvr/arduino-base64,
+ *  commit 999595783185a0afcba156d7276dfeaa9cb5382f.
+ */
+
+#ifndef CPPCODEC_DETAIL_BASE64
+#define CPPCODEC_DETAIL_BASE64
+
+#include <stdexcept>
+#include <stdint.h>
+
+#include "../data/access.hpp"
+#include "../parse_error.hpp"
+#include "config.hpp"
+#include "stream_codec.hpp"
+
+namespace cppcodec {
+namespace detail {
+
+template <typename CodecVariant>
+class base64 : public CodecVariant::template codec_impl<base64<CodecVariant>>
+{
+public:
+    static inline constexpr uint8_t binary_block_size() { return 3; }
+    static inline constexpr uint8_t encoded_block_size() { return 4; }
+
+    static CPPCODEC_ALWAYS_INLINE constexpr uint8_t num_encoded_tail_symbols(uint8_t num_bytes)
+    {
+        return (num_bytes == 1) ? 2    // 2 symbols, 2 padding characters
+                : (num_bytes == 2) ? 3 // 3 symbols, 1 padding character
+                : throw std::domain_error("invalid number of bytes in a tail block");
+    }
+
+    template <uint8_t I>
+    static CPPCODEC_ALWAYS_INLINE constexpr uint8_t index(
+            const uint8_t* b /*binary block*/) noexcept
+    {
+        static_assert(I >= 0 && I < encoded_block_size(),
+                "invalid encoding symbol index in a block");
+
+        return (I == 0) ? (b[0] >> 2) // first 6 bits
+                : (I == 1) ? (((b[0] & 0x3) << 4) | (b[1] >> 4))
+                : (I == 2) ? (((b[1] & 0xF) << 2) | (b[2] >> 6))
+                : /*I == 3*/ (b[2] & 0x3F); // last 6 bits
+    }
+
+    template <bool B>
+    using uint8_if = typename std::enable_if<B, uint8_t>::type;
+
+    template <uint8_t I>
+    static CPPCODEC_ALWAYS_INLINE constexpr uint8_if<I == 1 || I == 2> index_last(
+            const uint8_t* b /*binary block*/) noexcept
+    {
+        return (I == 1) ? ((b[0] & 0x3) << 4)     // abbreviated 2nd symbol
+                : /*I == 2*/ ((b[1] & 0xF) << 2); // abbreviated 3rd symbol
+    }
+
+    template <uint8_t I>
+    static CPPCODEC_ALWAYS_INLINE uint8_if<I != 1 && I != 2> index_last(
+            const uint8_t* /*binary block*/)
+    {
+        throw std::domain_error("invalid last encoding symbol index in a tail");
+    }
+
+    template <typename Result, typename ResultState>
+    static CPPCODEC_ALWAYS_INLINE void decode_block(
+            Result& decoded, ResultState&, const alphabet_index_t* idx);
+
+    template <typename Result, typename ResultState>
+    static CPPCODEC_ALWAYS_INLINE void decode_tail(
+            Result& decoded, ResultState&, const alphabet_index_t* idx, size_t idx_len);
+};
+
+
+template <typename CodecVariant>
+template <typename Result, typename ResultState>
+CPPCODEC_ALWAYS_INLINE void base64<CodecVariant>::decode_block(
+        Result& decoded, ResultState& state, const alphabet_index_t* idx)
+{
+    uint_fast32_t dec = (idx[0] << 18) | (idx[1] << 12) | (idx[2] << 6) | idx[3];
+    data::put(decoded, state, static_cast<uint8_t>(dec >> 16));
+    data::put(decoded, state, static_cast<uint8_t>((dec >> 8) & 0xFF));
+    data::put(decoded, state, static_cast<uint8_t>(dec & 0xFF));
+}
+
+template <typename CodecVariant>
+template <typename Result, typename ResultState>
+CPPCODEC_ALWAYS_INLINE void base64<CodecVariant>::decode_tail(
+        Result& decoded, ResultState& state, const alphabet_index_t* idx, size_t idx_len)
+{
+    if (idx_len == 1) {
+        throw invalid_input_length(
+                "invalid number of symbols in last base64 block: found 1, expected 2 or 3");
+    }
+
+    // idx_len == 2: decoded size 1
+    data::put(decoded, state, static_cast<uint8_t>((idx[0] << 2) + ((idx[1] & 0x30) >> 4)));
+    if (idx_len == 2) {
+        return;
+    }
+
+    // idx_len == 3: decoded size 2
+    data::put(decoded, state, static_cast<uint8_t>(((idx[1] & 0xF) << 4) + ((idx[2] & 0x3C) >> 2)));
+}
+
+} // namespace detail
+} // namespace cppcodec
+
+#endif // CPPCODEC_DETAIL_BASE64
-- 
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