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Re: mktime

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On 12/07/2012 03:48 AM, Heinrich Wolf wrote:
> 
> "Keith Thompson" <kst-u@mib.org> schrieb im Newsbeitrag 
> news:lnobi7ortk.fsf@nuthaus.mib.org...
>> Eric Sosman <esosman@comcast-dot-net.invalid> writes:
>> [...]
>>>      Clearly, the intent is to relieve the programmer of the burden
>>> of all that date arithmetic.  If you've got a struct tm representing
>>> some time T and you want to determine the time at T plus 01:23:45,
>>> you can blithely add 1*3600+23*60+45 to the tm_sec field and call
>>> mktime(), and mktime() will figure things out.
>> [...]
>>
>> Or you can add 1 to tm_hour, 23 to tm_min, and 45 to tm_sec, and let
>> mktime() figure *everything* out.
> 
> These may result in different values around a leap second (at the end of 
> some years) or around the transition from normal time to daylight savings 
> time or vice versa. 

Yes - and I think the different result you would get in those cases may
often be the one that was actually intended.


-- 
James Kuyper

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mktime Anders Wegge Keller <wegge@wegge.dk> - 2012-12-06 15:25 +0100
  Re: mktime James Kuyper <jameskuyper@verizon.net> - 2012-12-06 09:53 -0500
  Re: mktime Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-12-06 10:11 -0500
    Re: mktime Anders Wegge Keller <wegge@wegge.dk> - 2012-12-06 17:40 +0100
      Re: mktime Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-12-06 14:20 -0500
        Re: mktime Keith Thompson <kst-u@mib.org> - 2012-12-06 12:28 -0800
          Re: mktime Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-12-06 17:36 -0500
            Re: mktime Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-12-06 17:42 -0500
    Re: mktime Keith Thompson <kst-u@mib.org> - 2012-12-06 12:20 -0800
      Re: mktime Anders Wegge Keller <wegge@wegge.dk> - 2012-12-06 21:37 +0100
      Re: mktime "Heinrich Wolf" <invalid@invalid.invalid> - 2012-12-07 09:48 +0100
        Re: mktime James Kuyper <jameskuyper@verizon.net> - 2012-12-07 08:08 -0500
          Re: mktime "christian.bau" <christian.bau@cbau.wanadoo.co.uk> - 2012-12-07 09:23 -0800
            Re: mktime James Kuyper <jameskuyper@verizon.net> - 2012-12-07 13:14 -0500
            Re: mktime Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-12-07 13:46 -0500
            Re: mktime "Heinrich Wolf" <invalid@invalid.invalid> - 2012-12-07 19:59 +0100
            Re: mktime Robert Wessel <robertwessel2@yahoo.com> - 2012-12-07 15:50 -0600
        Re: mktime "Heinrich Wolf" <invalid@invalid.invalid> - 2012-12-07 21:39 +0100
          Re: mktime Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-12-07 17:17 -0500
            Re: mktime Keith Thompson <kst-u@mib.org> - 2012-12-07 17:50 -0800
              Re: mktime Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-12-08 08:34 -0500
          Re: mktime pacman@kosh.dhis.org (Alan Curry) - 2012-12-07 22:44 +0000
            Re: mktime "Heinrich Wolf" <invalid@invalid.invalid> - 2012-12-08 10:31 +0100
              Re: mktime pacman@kosh.dhis.org (Alan Curry) - 2012-12-08 20:50 +0000
                Re: mktime "Heinrich Wolf" <invalid@invalid.invalid> - 2012-12-09 11:39 +0100
                Re: mktime pacman@kosh.dhis.org (Alan Curry) - 2012-12-09 19:47 +0000
                Re: mktime "Heinrich Wolf" <invalid@invalid.invalid> - 2012-12-10 09:51 +0100
                Re: mktime sla29970@gmail.com - 2012-12-09 08:41 -0800

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