89 lines
1.8 KiB
C++
89 lines
1.8 KiB
C++
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#include "Pch.h"
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#include "Util.h"
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typedef std::string Str;
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typedef std::wstring WStr;
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static void utf8toWStr(WStr& dest, const Str& src){
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dest.clear();
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wchar_t w = 0;
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int bytes = 0;
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wchar_t err = L'<EFBFBD>';
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for (size_t i = 0; i < src.size(); i++){
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unsigned char c = (unsigned char)src[i];
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if (c <= 0x7f){//first byte
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if (bytes){
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dest.push_back(err);
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bytes = 0;
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}
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dest.push_back((wchar_t)c);
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}
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else if (c <= 0xbf){//second/third/etc byte
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if (bytes){
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w = ((w << 6)|(c & 0x3f));
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bytes--;
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if (bytes == 0)
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dest.push_back(w);
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}
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else
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dest.push_back(err);
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}
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else if (c <= 0xdf){//2byte sequence start
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bytes = 1;
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w = c & 0x1f;
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}
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else if (c <= 0xef){//3byte sequence start
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bytes = 2;
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w = c & 0x0f;
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}
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else if (c <= 0xf7){//3byte sequence start
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bytes = 3;
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w = c & 0x07;
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}
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else{
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dest.push_back(err);
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bytes = 0;
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}
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}
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if (bytes)
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dest.push_back(err);
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}
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static void wstrToUtf8(Str& dest, const WStr& src){
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dest.clear();
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for (size_t i = 0; i < src.size(); i++){
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wchar_t w = src[i];
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if (w <= 0x7f)
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dest.push_back((char)w);
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else if (w <= 0x7ff){
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dest.push_back(0xc0 | ((w >> 6)& 0x1f));
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dest.push_back(0x80| (w & 0x3f));
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}
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else if (w <= 0xffff){
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dest.push_back(0xe0 | ((w >> 12)& 0x0f));
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dest.push_back(0x80| ((w >> 6) & 0x3f));
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dest.push_back(0x80| (w & 0x3f));
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}
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else if (w <= 0x10ffff){
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dest.push_back(0xf0 | ((w >> 18)& 0x07));
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dest.push_back(0x80| ((w >> 12) & 0x3f));
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dest.push_back(0x80| ((w >> 6) & 0x3f));
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dest.push_back(0x80| (w & 0x3f));
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}
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else
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dest.push_back('?');
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}
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}
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Str wstrToUtf8(const WStr& str){
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Str result;
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wstrToUtf8(result, str);
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return result;
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}
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WStr utf8toWStr(const Str& str){
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WStr result;
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utf8toWStr(result, str);
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return result;
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}
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