UTF8与GBK间的转换

1.       GBK转UTF8

string GBKToUTF8(const std::string& strGBK)
{
   string strOutUTF8 = "";
   WCHAR * str1;
   int n = MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, NULL, 0);
   str1 = new WCHAR[n];
   MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, str1, n);
   n = WideCharToMultiByte(CP_UTF8, 0, str1, -1, NULL, 0, NULL, NULL);
   char * str2 = new char[n];
   WideCharToMultiByte(CP_UTF8, 0, str1, -1, str2, n, NULL, NULL);
   strOutUTF8 = str2;
   delete[]str1;
   str1 = NULL;
   delete[]str2;
   str2 = NULL;
   return strOutUTF8;
}

2.       UTF8转GBK

string UTF8ToGBK(const std::string& strUTF8)

{
   int len = MultiByteToWideChar(CP_UTF8, 0, strUTF8.c_str(), -1, NULL, 0);
   unsigned short * wszGBK = new unsigned short[len + 1];
   memset(wszGBK, 0, len * 2 + 2);
   MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strUTF8.c_str(), -1, wszGBK, len);
   len = WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, NULL, 0, NULL, NULL);
   char *szGBK = new char[len + 1];
   memset(szGBK, 0, len + 1);
   WideCharToMultiByte(CP_ACP,0, wszGBK, -1, szGBK, len, NULL, NULL);
   std::string strTemp(szGBK);
   delete[]szGBK;
   delete[]wszGBK;
   return strTemp;
}