Cpp Cross Platform Encoding

use

1/2 #include "encoding/encoding.h" // using for raw convert, using bytes
#include "encoding/encoding_std.h" // using for stl strings, std::string, std::wstring, std::u16string
#include "encoding/u16string_bytes.h"// using for lower than c++11, that not have std::u16string
2/2
add in CMakeLists.txt
if (NOT TARGET encoding)
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/../../cpp_cross_platform_encoding build_encoding)
endif ()
target_link_libraries(${BINARY_NAME} encoding)

snippet

// c language's helper functionstaticintutf8_2_utf16le_windows(constchar*src, size_tsrc_size, wchar_t*dst, size_t*dst_size)
{
intr=MultiByteToWideChar(CP_UTF8, 0, src, (int)(src_size), dst, (int)(*dst_size));
if (r <= 0)
{
return-1;
}
else
{
*dst_size= (size_t)(r);
return0;
}
}
staticintutf8_2_utf16le_windows2(constchar*src, size_tsrc_size, wchar_t**out_dst, size_t*out_dst_size)
{
intret;
wchar_t*dst=0;
size_tdst_size=0;
size_trsize=0;
ret=utf8_2_utf16le_windows(src, src_size, 0, &dst_size);
if (0==ret&&dst_size<0x10000)
{
// remember to call free()dst_size+=1;
dst= (wchar_t*)calloc(1, sizeof(wchar_t)*dst_size);
if (!dst) return-ENOMEM;
rsize=dst_size;
utf8_2_utf16le_windows(src, src_size, dst, &rsize);
if(rsize>=dst_size)
{
free(dst);
return-1;
}
*out_dst=dst;
dst[rsize]=0;
*out_dst_size=rsize;
return0;
}
return-1;
}
staticintutf16le_2_utf8_windows(constwchar_t*src, size_tsrc_size, char*dst, size_t*dst_size)
{
intr=WideCharToMultiByte(CP_UTF8, 0, src, (int)(src_size), dst, (int)(*dst_size), NULL, NULL);
if (r <= 0)
{
return-1;
}
else
{
*dst_size= (size_t)(r);
return0;
}
}
staticintutf16le_2_utf8_windows2(constwchar_t*src, size_tsrc_size, char**out_dst, size_t*out_dst_size)
{
intret;
char*dst=0;
size_tdst_size=0;
size_trsize=0;
ret=utf16le_2_utf8_windows(src, src_size, 0, &dst_size);
if (0==ret&&dst_size<0x10000)
{
// remember to call free()dst_size+=1;
dst= (char*)calloc(1, dst_size);
if (!dst) return-ENOMEM;
rsize=dst_size;
utf16le_2_utf8_windows(src, src_size, dst, &rsize);
if(rsize>=dst_size)
{
free(dst);
return-1;
}
*out_dst=dst;
dst[rsize]=0;
*out_dst_size=rsize;
return0;
}
return-1;
}

refs

[UTF-8 遍地开花] http://utf8everywhere.org/zh-cn