code.delx.au - gnu-emacs/blob - lib/time_r.c

   1 /* Reentrant time functions like localtime_r.
   2
   3    Copyright (C) 2003, 2006-2007, 2010-2015 Free Software Foundation,
   4    Inc.
   5
   6    This program 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 3, or (at your option)
   9    any later version.
  10
  11    This program 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 along
  17    with this program; if not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Written by Paul Eggert.  */
  20
  21 #include <config.h>
  22
  23 #include <time.h>
  24
  25 static struct tm *
  26 copy_tm_result (struct tm *dest, struct tm const *src)
  27 {
  28   if (! src)
  29     return 0;
  30   *dest = *src;
  31   return dest;
  32 }
  33
  34
  35 struct tm *
  36 gmtime_r (time_t const * restrict t, struct tm * restrict tp)
  37 {
  38   return copy_tm_result (tp, gmtime (t));
  39 }
  40
  41 struct tm *
  42 localtime_r (time_t const * restrict t, struct tm * restrict tp)
  43 {
  44   return copy_tm_result (tp, localtime (t));
  45 }