From: "Rafael García" <rafael AT geninfor DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: RE: mktime(01/01/70;00:00:XX)
Date: Thu, 15 Mar 2001 13:06:56 +0100
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

> Please post a complete short example program that can be compiled, and
> which shows the problem.


#include <stdio.h>
#include <time.h>

int main() {
   struct tm tm;

   tm.tm_year=70;    tm.tm_mon=0;    tm.tm_mday=1;
   tm.tm_hour=0;    tm.tm_min=0;   tm.tm_sec=0;
   tm.tm_isdst=-1;
   printf("%ld\n",(long)mktime(&tm));
   return 0;
   }

This should print 0 but it gives -1. And it fails with any second, until
minute 1.

> Also, what version of DJGPP do you have?  The time routines in v2.03
> (djdev203.zip from the usual DJGPP sites) were enhanced to solve some
> of the problems you are describing.

YES! Thank you.
I have tried with a newer package and it is OK.

But I have tried also with Borland C 3.1 (the compiler I was using
previously) and it shows strange numbers too.

And... Linux... it gives strange numbers for 01/01/70 too. I don't
understand.
I'm confused about using this function. I don't plan to use it for past
dates, but I don't know if I can trust this technique... I 'll have to do
arithmetic with many many dates/times