utf8转gbk，libcurl中文乱码处理

这两个转码在网页客户端处理用很常见，所使用的平台为VS2010，字符集采用多字节字符集

utf8转gbk

string UTF8ToGBK(const std::string& strUTF8)
{
    int len = MultiByteToWideChar(CP_UTF8, , strUTF8.c_str(), -, NULL, );
    WCHAR* wszGBK = new WCHAR[len+];
    memset(wszGBK, , len *  + );
    MultiByteToWideChar(CP_UTF8, , (LPCTSTR)strUTF8.c_str(), -, wszGBK, len);  

    len = WideCharToMultiByte(CP_ACP, , wszGBK, -, NULL, , NULL, NULL);
    char *szGBK = new char[len + ];
    memset(szGBK, , len + );
    WideCharToMultiByte(CP_ACP,, wszGBK, -, szGBK, len, NULL, NULL);
    std::string strTemp(szGBK);
    delete[]szGBK;
    delete[]wszGBK;
    return strTemp;
} 

gbk转utf8

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