lib/gztime.c

   1 /* gztime.c     convert into GeneralizedTime
   2  * Copyright (C) 2002, 2003  Simon Josefsson
   3  *
   4  * This file is part of Shishi.
   5  *
   6  * Shishi is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Shishi is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Shishi; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "internal.h"
  23 #include "timegm.h"
  24
  25 const char *
  26 shishi_generalize_time (Shishi * handle, time_t t)
  27 {
  28   struct tm *tm;
  29
  30   tm = gmtime (&t);
  31   strftime (handle->gztime_buf, sizeof (handle->gztime_buf),
  32             "%Y%m%d%H%M%SZ", tm);
  33
  34   return handle->gztime_buf;
  35 }
  36
  37 const char *
  38 shishi_generalize_now (Shishi * handle)
  39 {
  40   time_t t = xtime (NULL);
  41
  42   return shishi_generalize_time (handle, t);
  43 }
  44
  45 time_t
  46 shishi_generalize_ctime (Shishi * handle, const char *t)
  47 {
  48   struct tm tm;
  49   time_t ct;
  50
  51   memset (&tm, 0, sizeof (tm));
  52
  53   sscanf (t, "%4u%2u%2u%2u%2u%2uZ",
  54           &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
  55           &tm.tm_hour, &tm.tm_min, &tm.tm_sec);
  56   tm.tm_year -= 1900;
  57   tm.tm_mon--;
  58
  59   ct = timegm (&tm);
  60
  61   return ct;
  62 }