C++ Time returned is two hours out

Question

Bit of a c++ newbie so here we go;

I have a method that is parsing a date/time, however that date/time is passed to me always with 00:00:00 as the hh:mm:ss. As such i wa

Answer 1

Try this function:

CTime Time2UTC(CTime original)
{
    CString Formatted = original.FormatGmt(L"%Y%m%d%H%M%S");
    int Year, Month, Day, Hour, Minute;
    if (Formatted != L"" && Formatted.GetLength() >= 12)
    {
        Year = _wtol(Formatted.Left(4));
        Month = _wtol(Formatted.Mid(4, 2));
        Day = _wtol(Formatted.Mid(6,2));
        Hour = _wtol(Formatted.Mid(8, 2));
        Minute = _wtol(Formatted.Mid(10, 2));
        CTime result(Year, Month, Day, Hour, Minute, 0);
        return result;
    }
    else
        return (CTime)NULL;
}

Answer 2

The reson is the mktime() method used in the first function uses local time, but gmtime() uses UTC time.

See http://www.cplusplus.com/reference/clibrary/ctime/mktime/ and http://www.cplusplus.com/reference/clibrary/ctime/gmtime/ for further explanation.