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7683e140 RM |
1 | /* Convert UTC calendar time to simple time. Like mktime but assumes UTC. |
2 | ||
2b778ceb | 3 | Copyright (C) 1994-2021 Free Software Foundation, Inc. |
fd26970f | 4 | This file is part of the GNU C Library. |
28f540f4 | 5 | |
fd26970f | 6 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 10 | |
fd26970f UD |
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 | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
28f540f4 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
28f540f4 | 19 | |
8e6fd2bd | 20 | #ifndef _LIBC |
20aa5819 | 21 | # include <libc-config.h> |
7683e140 RM |
22 | #endif |
23 | ||
8e6fd2bd | 24 | #include <time.h> |
20aa5819 | 25 | #include <errno.h> |
8e6fd2bd PE |
26 | |
27 | #include "mktime-internal.h" | |
28f540f4 | 28 | |
20aa5819 PE |
29 | __time64_t |
30 | __timegm64 (struct tm *tmp) | |
28f540f4 | 31 | { |
8e6fd2bd | 32 | static mktime_offset_t gmtime_offset; |
28f540f4 | 33 | tmp->tm_isdst = 0; |
20aa5819 | 34 | return __mktime_internal (tmp, __gmtime64_r, &gmtime_offset); |
28f540f4 | 35 | } |
20aa5819 PE |
36 | |
37 | #if defined _LIBC && __TIMESIZE != 64 | |
38 | ||
39 | libc_hidden_def (__timegm64) | |
40 | ||
41 | time_t | |
42 | timegm (struct tm *tmp) | |
43 | { | |
44 | struct tm tm = *tmp; | |
45 | __time64_t t = __timegm64 (&tm); | |
46 | if (in_time_t_range (t)) | |
47 | { | |
48 | *tmp = tm; | |
49 | return t; | |
50 | } | |
51 | else | |
52 | { | |
53 | __set_errno (EOVERFLOW); | |
54 | return -1; | |
55 | } | |
56 | } | |
57 | ||
58 | #endif |