只包含中英文的UTF-8与Unicode的转换（不支持其它语言）

 1.UTF8转Unicode

 

// 把UTF-8转换成Unicode
void UTF_8ToUnicode(char *pIn,TCHAR* pOut)
{
  char* uchar = (char *)pOut;

  uchar[1] = ((pIn[0] & 0x0F) << 4) + ((pIn[1] >> 2) & 0x0F);
  uchar[0] = ((pIn[1] & 0x03) << 6) + (pIn[2] & 0x3F);

  return;
}

void UTF8_UNICODE(char *lpIn, int nLen, TCHAR *lpOut)
{
  int i = 0;
  int j = 0;
  while( i < nLen )
  {
     WCHAR unicode = 0;
     if( lpIn[i] > 0 )
     {
       *((char *)&unicode) = lpIn[i++];                       
     }
     else                 
     {
       UTF_8ToUnicode(lpIn + i,&unicode);
       i += 3;    
     }
  lpOut[j++] = unicode;
  }
 lpOut[j] = L&apos;/0&apos;;
}

2.Unicode转UTF-8

void UnicodeToUTF_8(TCHAR* pIn,char*pOut)
{
   char* pchar = (char *)pIn;   

   pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4));   
   pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6);   
   pOut[2] = (0x80 | (pchar[0] & 0x3F));
}

void UNICODE_UTF8(TCHAR* lpIn,int nLen,char* lpOut)
{
   int i = 0;
   int j = 0;

   while(i < nLen)
   {
      if(*(lpIn+i)>127)
      {
         UnicodeToUTF_8(lpIn + i,lpOut + j);
         j+=3;
      }
      else
      {
         *(lpOut+j) = (char)*(lpIn+i);
         j++;
      }
      i++;
   }
   lpOut[j+1] = 0;
}