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Sync from gnulib

This incorporates:
2016-05-01 mktime: port to stricter signed overflow checking
2016-05-01 mktime: speed up DEBUG_MKTIME benchmarks
2016-05-01 mktime: resurrect DEBUG_MKTIME testing
2016-05-01 mktime: simplify DEBUG_MKTIME
2016-05-01 Port mktime_internal offset to unsigned time_t
2016-04-27 xstrtol: prohibit monstrosities like "1bB"
2016-04-13 mktime: improve integer overflow checking
2016-04-13 intprops: check two's complement assumption
2016-04-13 intprops, mktime, strtol: assume two's complement
* lib/intprops.h, lib/mktime-internal.h, lib/mktime.c:
* lib/strtol.c, lib/timegm.c, m4/mktime.m4, m4/std-gnu11.m4:
Copy from gnulib.
This commit is contained in:
Paul Eggert 2016-05-01 18:36:38 -07:00
parent 13f4efb0fd
commit 3707f609cb
7 changed files with 263 additions and 339 deletions

View file

@ -1,4 +1,37 @@
/* 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 General Public
License as published by the Free Software Foundation; either
version 3 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
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/>. */
#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 *),
time_t *);
mktime_offset_t *);