CTimeSpan and CTime - are they machine specific?? pls help.

**intruder** · 09-22-2006

Hi all..

i have a question.

i am trying to calculate the date and doing some addition of time to the objects by using CTimeSpan and CTime.

so my question is, are these classes machine specific?

herez what i am doing.

int ActualDayCount::nAddDays( Date& dtAddTo, int nDays )
{
CTimeSpan ctsSpan = CTimeSpan( nDays, 0, 0, 0 );
CTime ctAddTo = dtAddTo.GetCTime();

ctAddTo += ctsSpan;
dtAddTo = Date( ctAddTo );
}

but what i have seen is it gives me difference results when i am running the code on a Server as compared to when i run the code in development with same input date and the nDays.

any help will be highly appreciated.

Thanks,
In.

**dwks** · 09-22-2006

I've never heard of CTime or CTimeSpan. They aren't part of standard C++ (well, maybe Windows C++). My only guess is that perhaps on one compiler integers are smaller than on the other. How different are the results?

Perhaps you could find the website for those classes and see if there are any portability issues for them.

**intruder** · 09-25-2006

I am getting a diff of around one day.

Thanks,
In

**ChaosEngine** · 09-25-2006

CTime and CTimeSpan are MFC classes so yes, they are not portable (i.e. they will only work on windows).

the boost.date_time library might be helpful to you.

**maxorator** · 09-26-2006

These are platform specific and compiler specific classes.
Seems to be a very bad idea when trying to do portable code.

**dwks** · 09-26-2006

I am getting a diff of around one day.

Leap year? I have no idea what could be wrong, as I've never heard of those classes.

If you want portable time and date functions, try the functions in <ctime>.

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CTimeSpan and CTime - are they machine specific?? pls help.