utf-8编码转换成Unicode

作者：京东瀚览家居官方旗舰店

 

 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;
}