gistfile1.txt

/* This file is part of herzi's playground
 *
 * AUTHORS
 *     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
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * 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>

int
main (int   argc,
      char**argv)
{
  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;
}