UTF8 & GBK之间的转换

// 1、将GBK转换成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、将UTF8转换成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);
 //strUTF8 = szGBK;
 std::string strTemp(szGBK);
 delete[]szGBK;
 delete[]wszGBK;
 return strTemp;
}