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anonymous /gist:108162
Created May 7, 2009

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/* This file is part of herzi's playground
* Sven Herzberg
* Copyright (C) 2009 Sven Herzberg
* This work is provided "as is"; redistribution and modification
* in whole or in part, in any medium, physical or electronic is
* permitted without restriction.
* This work is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* In no event shall the authors or contributors be liable for any
* direct, indirect, incidental, special, exemplary, or consequential
* damages (including, but not limited to, procurement of substitute
* goods or services; loss of use, data, or profits; or business
* interruption) however caused and on any theory of liability, whether
* in contract, strict liability, or tort (including negligence or
* otherwise) arising in any way out of the use of this software, even
* if advised of the possibility of such damage.
#define _XOPEN_SOURCE // for strptime() - even though strptime(3posix) doesn't mention it
#include <time.h>
#include <stdio.h>
#include <string.h>
main (int argc,
char const* gm_string = "2009-05-07 12:00:00";
char buffer[128];
struct tm time;
printf ("%s\n", gm_string);
memset (&time, 0, sizeof (time));
strptime (gm_string, "%Y-%m-%d %H:%M:%S", &time);
strftime (buffer, sizeof (buffer), "%Y-%m-%d %H:%M:%S %z", &time);
printf ("%s\n", buffer);
mktime (&time);
strftime (buffer, sizeof (buffer), "%Y-%m-%d %H:%M:%S %z", &time);
printf ("%s\n", buffer);
return 0;
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