compat/localtime_r.c

   1 /*****************************************************************************
   2  * localtime_r.c: POSIX localtime_r() replacement
   3  *****************************************************************************
   4  * Copyright © 1998-2015 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) 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 Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #if defined(__STDC_LIB_EXT1__) && (__STDC_LIB_EXT1__ >= 20112L)
  22 # define __STDC_WANT_LIB_EXT1__ 1
  23 #else
  24 # define __STDC_WANT_LIB_EXT1__ 0
  25 #endif
  26 #ifdef HAVE_CONFIG_H
  27 # include <config.h>
  28 #endif
  29
  30 #include <errno.h>
  31 #include <time.h>
  32
  33 /* If localtime_r() is not provided, we assume localtime() uses
  34  * thread-specific storage. */
  35 struct tm *localtime_r (const time_t *timep, struct tm *result)
  36 {
  37 #if (__STDC_WANT_LIB_EXT1__)
  38     return localtime_s(timep, result);
  39 #elif defined (_WIN32)
  40     return ((errno = localtime_s(result, timep)) == 0) ? result : NULL;
  41 #else
  42 # warning localtime_r() not implemented!
  43     return gmtime_r(timep, result);
  44 #endif
  45 }