61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
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/* Provide access to the last buffer returned by localtime() or gmtime().
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Copyright (C) 2001-2003, 2005-2007, 2009-2020 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 <https://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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#undef localtime
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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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#undef gmtime
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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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