time/gmtime.c

   1 /* Convert `time_t' to `struct tm' in UTC.
   2    Copyright (C) 1991, 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <time.h>
  21
  22 /* Defined in localtime.c.  */
  23 extern struct tm _tmbuf;
  24
  25 /* Prototype for the internal function to get information based on TZ.  */
  26 extern struct tm *__tz_convert __P ((const time_t *t, int use_localtime,
  27                                      struct tm *tp));
  28
  29
  30 /* Return the `struct tm' representation of *T in UTC,
  31    using *TP to store the result.  */
  32 struct tm *
  33 __gmtime_r (t, tp)
  34      const time_t *t;
  35      struct tm *tp;
  36 {
  37   return __tz_convert (t, 0, tp);
  38 }
  39 weak_alias (__gmtime_r, gmtime_r)
  40
  41
  42 /* Return the `struct tm' representation of *T in UTC.  */
  43 struct tm *
  44 gmtime (t)
  45      const time_t *t;
  46 {
  47   return __tz_convert (t, 0, &_tmbuf);
  48 }