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emacs/lib/mktime-internal.h
Paul Eggert fc389d3a83 Update from Gnulib
This incorporates:
2018-09-10 timespec: fix resolution confusion
2018-09-09 mktime: simplify in prep for glibc merge
2018-09-07 intprops: minor clarification of code
2018-09-06 stddef: Override max_align_t on NetBSD 8.0/x86
2018-09-06 fcntl: Fix F_DUPFD_CLOEXEC behaviour on Haiku
2018-09-06 strtoll, strtoull: Rely on limits-h module
2018-09-06 limits-h: Provide numerical limits macros
2018-09-06 fcntl: Don't access nonexistent optional argument
2018-09-02 mktime: fix unlikely race+overflow bug
2018-08-31 mktime, timegm: simplify glibc time64_t
2018-08-31 mktime, timegm: simplify merge to glibc
* build-aux/config.guess, build-aux/config.sub:
* lib/dtotimespec.c, lib/fcntl.c, lib/intprops.h:
* lib/limits.in.h, lib/mktime-internal.h, lib/mktime.c:
* lib/stat-time.h, lib/strtol.c, lib/timegm.c:
* lib/timespec-add.c, lib/timespec-sub.c, lib/timespec.h:
* lib/utimens.c, m4/limits-h.m4, m4/stddef_h.m4:
Copy from Gnulib.
2018-09-10 21:22:54 -07:00

54 lines
2.0 KiB
C

/* mktime variant that also uses an offset guess
Copyright 2016-2018 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
<https://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 *);
/* Although glibc source code uses leading underscores, Gnulib wants
ordinary names.
Portable standalone applications should supply a <time.h> that
declares a POSIX-compliant localtime_r, for the benefit of older
implementations that lack localtime_r or have a nonstandard one.
Similarly for gmtime_r. See the gnulib time_r module for one way
to implement this. */
#undef __gmtime_r
#undef __localtime_r
#define __gmtime_r gmtime_r
#define __localtime_r localtime_r
#define __mktime_internal mktime_internal