UTF8编码转Unicode编码(C语言)

/**

• 功能：UTF8编码转Unicode编码

• 参数：dst 目标字符串，src 源字符串
  */
  WORD UTF8_to_Unicode(BYTE *dst, BYTE *src)
  {
  WORD i = 0, unicode = 0, ii, iii;
  int codeLen = 0;

  while ( *src )
  {
  //1. UTF-8 ---> Unicode
  if(0 == (src[0] & 0x80))
  {
  // 单字节
  codeLen = 1;
  unicode = src[0];
  }
  else if(0xC0 == (src[0] & 0xE0) && 0x80 == (src[1] & 0xC0))
  {// 双字节
  codeLen = 2;
  unicode = (WORD)((((WORD)src[0] & 0x001F) << 6) | ((WORD)src[1] & 0x003F));
  }
  else if(0xE0 == (src[0] & 0xF0) && 0x80 == (src[1] & 0xC0) && 0x80 == (src[2] & 0xC0))
  {// 三字节
  codeLen = 3;
  ii = (((WORD)src[0] & 0x000F) << 12);
  iii = (((WORD)src[1] & 0x003F) << 6);
  unicode = ii|iii|((WORD)src[2] & 0x003F);
  unicode = (WORD)((((WORD)src[0] & 0x000F) << 12) | (((WORD)src[1] & 0x003F) << 6) | ((WORD)src[2] & 0x003F));
  }
  else if(0xF0 == (src[0] & 0xF0) && 0x80 == (src[1] & 0xC0) && 0x80 == (src[2] & 0xC0) && 0x80 == (src[3] & 0xC0))
  {// 四字节
  codeLen = 4;
  unicode = (((int)(src[0] & 0x07)) << 18) | (((int)(src[1] & 0x3F)) << 12) | (((int)(src[2] & 0x3F)) << 6) | (src[3] & 0x3F);
  }
  else
  {
  INFOBOX_Show("超出4字节的Unicode码", 100);
  break;
  }
  src += codeLen;
  if (unicode < 0x80)
  {
  if (i == 0 && unicode == 0x20)
  {
  continue;
  }
  }
  i += 2;
  *dst++ = (BYTE)(unicode&0xff);
  *dst++ = (BYTE)((unicode>>8)&0xff);
  } // end while
  *dst = 0;

  return i;
  }