kc3-lang/gnulib/lib/timegm.c

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• Hash : b28c2cda
  Author :
  Date : 2016-05-01T11:44:51
  

  Port mktime_internal offset to unsigned time_t
  
  This avoids some assumptions about wraparound arithmetic on
  signed integer overflow.
  * lib/mktime-internal.h (mktime_offset_t): New type.
  (mktime_internal): Use it in decl.
  * lib/mktime.c, lib/timegm.c (mktime_offset_t) [_LIBC]: New type.
  * lib/mktime.c (__mktime_internal, localtime_offset):
  * lib/timegm.c (timegm): Use it.
  * m4/mktime.m4 (gl_TIME_T_IS_SIGNED): New macro.
  (gl_FUNC_MKTIME): Require it.
  

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• lib/timegm.c

• /* Convert UTC calendar time to simple time.  Like mktime but assumes UTC.
  
     Copyright (C) 1994, 1997, 2003-2004, 2006-2007, 2009-2016 Free Software
     Foundation, Inc.  This file is part of the GNU C Library.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2, or (at your option)
     any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, see <http://www.gnu.org/licenses/>.  */
  
  #ifndef _LIBC
  # include <config.h>
  #endif
  
  #include <time.h>
  
  #ifdef _LIBC
  typedef time_t mktime_offset_t;
  #else
  # undef __gmtime_r
  # define __gmtime_r gmtime_r
  # define __mktime_internal mktime_internal
  # include "mktime-internal.h"
  #endif
  
  time_t
  timegm (struct tm *tmp)
  {
    static mktime_offset_t gmtime_offset;
    tmp->tm_isdst = 0;
    return __mktime_internal (tmp, __gmtime_r, &gmtime_offset);
  }
  

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