1  /* Reentrant time functions like localtime_r.
       2  
       3     Copyright (C) 2003, 2006-2007, 2010-2023 Free Software Foundation, Inc.
       4  
       5     This file is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU Lesser General Public License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     License, or (at your option) any later version.
       9  
      10     This file 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
      16     along 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  }