634d0a907f
This incorporates: 2017-05-01 New module 'localtime-buffer' 2017-04-30 utimens: Add support for native Windows * admin/merge-gnulib (AVOIDED_MODULES): Add tzset. * configure.ac (tzset): No need for Emacs itself to check now. * lib/gettimeofday.c, lib/time.in.h, lib/time_rz.c, lib/utimens.c: * m4/gettimeofday.m4, m4/time_h.m4, m4/time_rz.m4: Copy from gnulib. * lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate. * lib/localtime-buffer.c, lib/localtime-buffer.h: * m4/localtime-buffer.m4: New files, copied from gnulib. * src/editfns.c (init_editfns): Assume tzset is callable.
58 lines
1.6 KiB
C
58 lines
1.6 KiB
C
/* Provide access to the last buffer returned by localtime() or gmtime().
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Copyright (C) 2001-2003, 2005-2007, 2009-2017 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>. */
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/* written by Jim Meyering */
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#include <config.h>
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/* Specification. */
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#include "localtime-buffer.h"
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#if GETTIMEOFDAY_CLOBBERS_LOCALTIME || TZSET_CLOBBERS_LOCALTIME
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static struct tm tm_zero_buffer;
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struct tm *localtime_buffer_addr = &tm_zero_buffer;
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/* This is a wrapper for localtime.
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On the first call, record the address of the static buffer that
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localtime uses for its result. */
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struct tm *
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rpl_localtime (time_t const *timep)
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{
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struct tm *tm = localtime (timep);
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if (localtime_buffer_addr == &tm_zero_buffer)
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localtime_buffer_addr = tm;
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return tm;
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}
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/* Same as above, since gmtime and localtime use the same buffer. */
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struct tm *
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rpl_gmtime (time_t const *timep)
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{
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struct tm *tm = gmtime (timep);
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if (localtime_buffer_addr == &tm_zero_buffer)
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localtime_buffer_addr = tm;
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return tm;
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}
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#endif
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