UNICODE 与 UTF8 的相互转换 (c++)版

网上找了半天,很麻烦,最后弄得了贴出来方便大家:




void UnicodeToUtf8(char *utf8)




...{


int len = 0;


int size_d = 8;


DWORD dwNum = MultiByteToWideChar (CP_ACP, 0, utf8, -1, NULL, 0);


wchar_t *wchar;


wchar = new wchar_t[dwNum];


if(!wchar)




...{


delete []wchar;


}


MultiByteToWideChar (CP_ACP, 0,utf8, -1, wchar, dwNum);


for(int i = 0; i <dwNum; i++)




...{


if ((wchar[i]) < 0x80)




...{ //


utf8[len++] = (char)(wchar[i]);


}


else if((wchar[i]) < 0x800)




...{


utf8[len++] = 0xc0 | ( (*wchar) >> 6 );


utf8[len++] = 0x80 | ( (*wchar) & 0x3f );


}


else if((wchar[i]) < 0x10000 )




...{


utf8[len++] = 0xE0 | ((wchar[i]) >> 12);


utf8[len++] = 0x80 | (((wchar[i])>>6) & 0x3F);


utf8[len++] = 0x80 | ((wchar[i]) & 0x3F);


}


else if((wchar[i]) < 0x200000 )




...{


utf8[len++] = 0xf0 | ( (int)(wchar[i]) >> 18 );


utf8[len++] = 0x80 | ( ((wchar[i]) >> 12) & 0x3f );


utf8[len++] = 0x80 | ( ((wchar[i]) >> 6) & 0x3f );


utf8[len++] = 0x80 | ( (wchar[i]) & 0x3f );


}


}


}


CString UTF8toUnicode(char *s)




...{


int len = 0;


WCHAR* r = new WCHAR[strlen(s) * 2];


while(s[0])




...{


int bytes = 1;


if(s[0] & 0x80)


while(s[0] & (0x80 >> bytes)) bytes++;


if(bytes == 1)


r[len] = s[0];


else




...{


r[len] = 0;


for(char*p = s + (bytes - 1); p > s; p--)


r[len] |= ((*p) & 0x3F) << ((bytes - (p - s) - 1) * 6);


r[len] |= (s[0] & ((1 << (7 - bytes)) - 1)) << ((bytes - 1) * 6);


}


len++;


s += bytes;


}


r[len] = 0;


char*buffer = new char[len * 2 + 1];


ZeroMemory(buffer, len * 2 + 1);


::WideCharToMultiByte(CP_ACP, NULL, r, len, buffer, 1+ 2 * len, NULL, NULL);


CString str = buffer;


delete[] r;


delete[] buffer;


return str;


}

能用 具体再自己改