最近碰到字符串编码转换的问题，简单记录下
utf8 转 unicode
std::wstring UTF8ToWide(const std::string& source)
{
std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
return conv.from_bytes(source);
}
unicode 转 utf8
std::string WideToUTF8(const std::wstring& source)
{
std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
return conv.to_bytes(source);
}
utf8 转 utf16
std::u16string UTF8ToUTF16(const std::string& source)
{
#if defined(OS_WIN)
#if _MSC_VER >= 1900
std::wstring_convert<std::codecvt_utf8_utf16<int16_t>, int16_t> conv;
auto begin_pos = reinterpret_cast<const int8_t*>(source.data());
return (char16_t*)conv.from_bytes((char*)begin_pos, (char*)(begin_pos + source.size())).c_str();
#else
std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> conv;
return conv.from_bytes(source);
#endif
#else
std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> conv;
return conv.from_bytes(source);
#endif
}
utf16 转 utf8
std::string UTF16ToUTF8(const std::u16string& source)
{
#if defined(OS_WIN)
#if _MSC_VER >= 1900
std::wstring_convert<std::codecvt_utf8_utf16<int16_t>, int16_t> conv;
auto begin_pos = reinterpret_cast<const int16_t*>(source.data());
return conv.to_bytes(begin_pos, begin_pos + source.size());
#else
std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> conv;
return conv.to_bytes(source);
#endif
#else
std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> conv;
return conv.to_bytes(source);
#endif
}
Ascii 转unicode
std::wstring AsciiToWide(std::string _strSrc)
{
int unicodeLen = MultiByteToWideChar(CP_ACP, 0, _strSrc.c_str(), -1, nullptr, 0);
wchar_t *pUnicode = (wchar_t*)malloc(sizeof(wchar_t)*unicodeLen);
MultiByteToWideChar(CP_ACP, 0, _strSrc.c_str(), -1, pUnicode, unicodeLen);
std::wstring ret_str = pUnicode;
free(pUnicode);
return ret_str;
}
unicode 转 Ascii
std::string WideToAscii(std::wstring _strSrc)
{
int ansiiLen = WideCharToMultiByte(CP_ACP, 0, _strSrc.c_str(), -1, nullptr, 0, nullptr, nullptr);
char *pAssii = (char*)malloc(sizeof(char)*ansiiLen);
WideCharToMultiByte(CP_ACP, 0, _strSrc.c_str(), -1, pAssii, ansiiLen, nullptr, nullptr);
std::string ret_str = pAssii;
free(pAssii);
return ret_str;
}
utf8 转 Ascii
std::string UTF8ToAscii(std::string _strSrc)
{
return WideToAscii(UTF8ToWide(_strSrc));
}
Ascii 转 utf8
std::string AsciiToUTF8(std::string _strSrc)
{
return WideToUTF8(AsciiToWide(_strSrc));
}
