lib/time_r.c

   1 /* Reentrant time functions like localtime_r.
   2
   3    Copyright (C) 2003, 2006-2007, 2010-2018 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3, or (at your option)
   8    any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License along
  16    with this program; if not, see <https://www.gnu.org/licenses/>.  */
  17
  18 /* Written by Paul Eggert.  */
  19
  20 #include <config.h>
  21
  22 #include <time.h>
  23
  24 static struct tm *
  25 copy_tm_result (struct tm *dest, struct tm const *src)
  26 {
  27   if (! src)
  28     return 0;
  29   *dest = *src;
  30   return dest;
  31 }
  32
  33
  34 struct tm *
  35 gmtime_r (time_t const * restrict t, struct tm * restrict tp)
  36 {
  37   return copy_tm_result (tp, gmtime (t));
  38 }
  39
  40 struct tm *
  41 localtime_r (time_t const * restrict t, struct tm * restrict tp)
  42 {
  43   return copy_tm_result (tp, localtime (t));
  44 }