kc3-lang/gnulib/lib/mktime-internal.h

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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/mktime-internal.h

• /* mktime variant that also uses an offset guess
  
     Copyright 2016 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, 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
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with this program; if not, see
     <http://www.gnu.org/licenses/>.  */
  
  #include <time.h>
  
  /* mktime_offset_t is a signed type wide enough to hold a UTC offset
     in seconds, and used as part of the type of the offset-guess
     argument to mktime_internal.  Use time_t on platforms where time_t
     is signed, to be compatible with platforms like BeOS that export
     this implementation detail of mktime.  On platforms where time_t is
     unsigned, GNU and POSIX code can assume 'int' is at least 32 bits
     which is wide enough for a UTC offset.  */
  
  #if TIME_T_IS_SIGNED
  typedef time_t mktime_offset_t;
  #else
  typedef int mktime_offset_t;
  #endif
  
  time_t mktime_internal (struct tm *,
                          struct tm * (*) (time_t const *, struct tm *),
                          mktime_offset_t *);
  

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