1 /* A more-standard <time.h>.
3 Copyright (C) 2007 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 /* Don't get in the way of glibc when it includes time.h merely to
20 declare a few standard symbols, rather than to declare all the
22 #if defined __need_time_t || defined __need_clock_t || defined __need_timespec
23 # include @ABSOLUTE_TIME_H@
25 #elif ! defined _GL_TIME_H
27 # include @ABSOLUTE_TIME_H@
33 /* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3).
34 Or they define it with the wrong member names or define it in <sys/time.h>
35 (e.g., FreeBSD circa 1997). */
36 # if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@
37 # if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
38 # include <sys/time.h>
41 # define timespec rpl_timespec
50 /* Sleep for at least RQTP seconds unless interrupted, If interrupted,
51 return -1 and store the remaining time into RMTP. See
52 <http://www.opengroup.org/susv3xsh/nanosleep.html>. */
53 # if @REPLACE_NANOSLEEP@
54 # define nanosleep rpl_nanosleep
55 int nanosleep (struct timespec const *__rqtp, struct timespec *__rmtp);
58 /* Convert TIMER to RESULT, assuming local time and UTC respectively. See
59 <http://www.opengroup.org/susv3xsh/localtime_r.html> and
60 <http://www.opengroup.org/susv3xsh/gmtime_r.html>. */
61 # if @REPLACE_LOCALTIME_R@
63 # define localtime_r rpl_localtime_r
65 # define gmtime_r rpl_gmtime_r
66 struct tm *localtime_r (time_t const *restrict __timer,
67 struct tm *restrict __result);
68 struct tm *gmtime_r (time_t const *restrict __timer,
69 struct tm *restrict __result);
72 /* Parse BUF as a time stamp, assuming FORMAT specifies its layout, and store
73 the resulting broken-down time into TM. See
74 <http://www.opengroup.org/susv3xsh/strptime.html>. */
75 # if @REPLACE_STRPTIME@
77 # define strptime rpl_strptime
78 char *strptime (char const *restrict __buf, char const *restrict __format,
79 struct tm *restrict __tm);
82 /* Convert TM to a time_t value, assuming UTC. */
85 # define timegm rpl_timegm
86 time_t timegm (struct tm *__tm);
89 /* Encourage applications to avoid unsafe functions that can overrun
90 buffers when given outlandish struct tm values. Portable
91 applications should use strftime (or even sprintf) instead. */
94 # define asctime eschew_asctime
96 # define asctime_r eschew_asctime_r
98 # define ctime eschew_ctime
100 # define ctime_r eschew_ctime_r