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

This is a discussion on CTimeSpan and CTime - are they machine specific?? pls help. within the C++ Programming forums, part of the General Programming Boards category; Hi all.. i have a question. i am trying to calculate the date and doing some addition of time to ...

  1. #1
    Registered User intruder's Avatar
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    Unhappy CTimeSpan and CTime - are they machine specific?? pls help.

    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.

  2. #2
    Frequently Quite Prolix dwks's Avatar
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    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.
    dwk

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  3. #3
    Registered User intruder's Avatar
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    I am getting a diff of around one day.

    Thanks,
    In

  4. #4
    semi-colon generator ChaosEngine's Avatar
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    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.
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    Reverse Engineer maxorator's Avatar
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    These are platform specific and compiler specific classes.
    Seems to be a very bad idea when trying to do portable code.
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  6. #6
    Frequently Quite Prolix dwks's Avatar
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    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>.
    dwk

    Seek and ye shall find. quaere et invenies.

    "Simplicity does not precede complexity, but follows it." -- Alan Perlis
    "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra
    "The only real mistake is the one from which we learn nothing." -- John Powell


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