1  /* mktime variant that also uses an offset guess
       2  
       3     Copyright 2016-2018 Free Software Foundation, Inc.
       4  
       5     This program is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) 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 GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with this program; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <time.h>
      20  
      21  /* mktime_offset_t is a signed type wide enough to hold a UTC offset
      22     in seconds, and used as part of the type of the offset-guess
      23     argument to mktime_internal.  Use time_t on platforms where time_t
      24     is signed, to be compatible with platforms like BeOS that export
      25     this implementation detail of mktime.  On platforms where time_t is
      26     unsigned, GNU and POSIX code can assume 'int' is at least 32 bits
      27     which is wide enough for a UTC offset.  */
      28  
      29  #if TIME_T_IS_SIGNED
      30  typedef time_t mktime_offset_t;
      31  #else
      32  typedef int mktime_offset_t;
      33  #endif
      34  
      35  time_t mktime_internal (struct tm *,
      36                          struct tm * (*) (time_t const *, struct tm *),
      37                          mktime_offset_t *);
      38  
      39  /* Although glibc source code uses leading underscores, Gnulib wants
      40     ordinary names.
      41  
      42     Portable standalone applications should supply a <time.h> that
      43     declares a POSIX-compliant localtime_r, for the benefit of older
      44     implementations that lack localtime_r or have a nonstandard one.
      45     Similarly for gmtime_r.  See the gnulib time_r module for one way
      46     to implement this.  */
      47  
      48  #undef __gmtime_r
      49  #undef __localtime_r
      50  #define __gmtime_r gmtime_r
      51  #define __localtime_r localtime_r
      52  
      53  #define __mktime_internal mktime_internal