lib/time_r.c

   1 /* Reentrant time functions like localtime_r.
   2
   3    Copyright (C) 2003, 2006, 2007 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 Lesser General Public License as published by
   7    the Free Software Foundation; either version 2, 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 Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License along
  16    with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* Written by Paul Eggert.  */
  20
  21 #include <config.h>
  22
  23 #include <time.h>
  24
  25 #include <string.h>
  26
  27 static struct tm *
  28 copy_tm_result (struct tm *dest, struct tm const *src)
  29 {
  30   if (! src)
  31     return 0;
  32   *dest = *src;
  33   return dest;
  34 }
  35
  36
  37 struct tm *
  38 gmtime_r (time_t const * restrict t, struct tm * restrict tp)
  39 {
  40   return copy_tm_result (tp, gmtime (t));
  41 }
  42
  43 struct tm *
  44 localtime_r (time_t const * restrict t, struct tm * restrict tp)
  45 {
  46   return copy_tm_result (tp, localtime (t));
  47 }