| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Convert UTC calendar time to simple time. Like mktime but assumes UTC. |
| 2 | |
| 3 | Copyright (C) 1994-2016 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library 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 GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifdef HAVE_CONFIG_H |
| 21 | # include <config.h> |
| 22 | #endif |
| 23 | |
| 24 | #ifdef _LIBC |
| 25 | # include <time.h> |
| 26 | #else |
| 27 | # include "timegm.h" |
| 28 | |
| 29 | /* Portable standalone applications should supply a "time_r.h" that |
| 30 | declares a POSIX-compliant gmtime_r, for the benefit of older |
| 31 | implementations that lack gmtime_r or have a nonstandard one. |
| 32 | See the gnulib time_r module for one way to implement this. */ |
| 33 | # include <time_r.h> |
| 34 | # undef __gmtime_r |
| 35 | # define __gmtime_r gmtime_r |
| 36 | time_t __mktime_internal (struct tm *, |
| 37 | struct tm * (*) (time_t const *, struct tm *), |
| 38 | time_t *); |
| 39 | #endif |
| 40 | |
| 41 | time_t |
| 42 | timegm (struct tm *tmp) |
| 43 | { |
| 44 | static time_t gmtime_offset; |
| 45 | tmp->tm_isdst = 0; |
| 46 | return __mktime_internal (tmp, __gmtime_r, &gmtime_offset); |
| 47 | } |