C++ UTF8\GBK互相转换

char* G2U(const char* gb2312)

{

    int len = MultiByteToWideChar(CP_ACP, 0, gb2312, -1, NULL, 0);

    wchar_t* wstr = new wchar_t[len+1];

    memset(wstr, 0, len+1);

    MultiByteToWideChar(CP_ACP, 0, gb2312, -1, wstr, len);

    len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);

    char* str = new char[len+1];

    memset(str, 0, len+1);

    WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, len, NULL, NULL);

    if(wstr) delete[] wstr;

    return str;

}

char* U2G(const char* utf8)

{

    int len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);

    wchar_t* wstr = new wchar_t[len+1];

    memset(wstr, 0, len+1);

    MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wstr, len);

    len = WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);

    char* str = new char[len+1];

    memset(str, 0, len+1);

    WideCharToMultiByte(CP_ACP, 0, wstr, -1, str, len, NULL, NULL);

    if(wstr) delete[] wstr;

    return str;

}