Store database storage to files, also loading

1 files changed, 57 insertions, 0 deletions

diff --git a/src/FileUtils.cpp b/src/FileUtils.cpp
new file mode 100644
index 0000000..3a78a63
--- /dev/null
+++ b/src/FileUtils.cpp
@@ -0,0 +1,57 @@
+#include "../include/odhtdb/FileUtils.hpp"
+#include "../include/odhtdb/env.hpp"
+
+using namespace std;
+
+namespace odhtdb
+{
+    OwnedMemory fileGetContent(const boost::filesystem::path &filepath)
+    {
+#if OS_FAMILY == OS_FAMILY_POSIX
+        FILE *file = fopen(filepath.string().c_str(), "rb");
+#else
+        FILE *file = _wfopen(filepath.wstring().c_str(), L"rb");
+#endif
+        if(!file)
+        {
+            int error = errno;
+            string errMsg = "Failed to open file: ";
+            errMsg += filepath.string();
+            errMsg += "; reason: ";
+            errMsg += strerror(error);
+            throw FileException(errMsg);
+        }
+
+        fseek(file, 0, SEEK_END);
+        size_t fileSize = ftell(file);
+        fseek(file, 0, SEEK_SET);
+
+        char *result = new char[fileSize];
+        fread(result, 1, fileSize, file);
+        fclose(file);
+        return { result, fileSize };
+    }
+    
+    void fileAppend(const boost::filesystem::path &filepath, const DataView &data)
+    {
+#if OS_FAMILY == OS_FAMILY_POSIX
+        FILE *file = fopen(filepath.string().c_str(), "ab+");
+#else
+        FILE *file = _wfopen(filepath.wstring().c_str(), L"ab+");
+#endif
+        if(!file)
+        {
+            int error = errno;
+            string errMsg = "Failed to append to file: ";
+            errMsg += filepath.string();
+            errMsg += "; reason: ";
+            errMsg += strerror(error);
+            throw FileException(errMsg);
+        }
+        
+        flockfile(file);
+        setbuf(file, NULL);
+        fwrite(data.data, 1, data.size, file);
+        fclose(file);
+    }
+}