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-rw-r--r--gl/timegm.c41
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1/* Convert UTC calendar time to simple time. Like mktime but assumes UTC.
2
3 Copyright (C) 1994, 1997, 2003, 2004, 2006, 2007 Free Software
4 Foundation, Inc. This file is part of the GNU C Library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19
20#ifndef _LIBC
21# include <config.h>
22#endif
23
24#include <time.h>
25
26#ifndef _LIBC
27# undef __gmtime_r
28# define __gmtime_r gmtime_r
29# define __mktime_internal mktime_internal
30time_t __mktime_internal (struct tm *,
31 struct tm * (*) (time_t const *, struct tm *),
32 time_t *);
33#endif
34
35time_t
36timegm (struct tm *tmp)
37{
38 static time_t gmtime_offset;
39 tmp->tm_isdst = 0;
40 return __mktime_internal (tmp, __gmtime_r, &gmtime_offset);
41}