1/* A more-standard <time.h>.
2
3   Copyright (C) 2007 Free Software Foundation, Inc.
4
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 3, or (at your option)
8   any later version.
9
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.
14
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.  */
18
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
21   symbols.  Also, Solaris 8 <time.h> eventually includes itself
22   recursively; if that is happening, just include the system <time.h>
23   without adding our own declarations.  */
24#if (defined __need_time_t || defined __need_clock_t \
25     || defined __need_timespec \
26     || defined _GL_TIME_H)
27
28# @INCLUDE_NEXT@ @NEXT_TIME_H@
29
30#else
31
32# define _GL_TIME_H
33
34# @INCLUDE_NEXT@ @NEXT_TIME_H@
35
36# ifdef __cplusplus
37extern "C" {
38# endif
39
40/* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3).
41   Or they define it with the wrong member names or define it in <sys/time.h>
42   (e.g., FreeBSD circa 1997).  */
43# if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@
44#  if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
45#   include <sys/time.h>
46#  else
47#   undef timespec
48#   define timespec rpl_timespec
49struct timespec
50{
51  time_t tv_sec;
52  long int tv_nsec;
53};
54#  endif
55# endif
56
57/* Sleep for at least RQTP seconds unless interrupted,  If interrupted,
58   return -1 and store the remaining time into RMTP.  See
59   <http://www.opengroup.org/susv3xsh/nanosleep.html>.  */
60# if @REPLACE_NANOSLEEP@
61#  define nanosleep rpl_nanosleep
62int nanosleep (struct timespec const *__rqtp, struct timespec *__rmtp);
63# endif
64
65/* Convert TIMER to RESULT, assuming local time and UTC respectively.  See
66   <http://www.opengroup.org/susv3xsh/localtime_r.html> and
67   <http://www.opengroup.org/susv3xsh/gmtime_r.html>.  */
68# if @REPLACE_LOCALTIME_R@
69#  undef localtime_r
70#  define localtime_r rpl_localtime_r
71#  undef gmtime_r
72#  define gmtime_r rpl_gmtime_r
73struct tm *localtime_r (time_t const *restrict __timer,
74			struct tm *restrict __result);
75struct tm *gmtime_r (time_t const *restrict __timer,
76		     struct tm *restrict __result);
77# endif
78
79/* Parse BUF as a time stamp, assuming FORMAT specifies its layout, and store
80   the resulting broken-down time into TM.  See
81   <http://www.opengroup.org/susv3xsh/strptime.html>.  */
82# if @REPLACE_STRPTIME@
83#  undef strptime
84#  define strptime rpl_strptime
85char *strptime (char const *restrict __buf, char const *restrict __format,
86		struct tm *restrict __tm);
87# endif
88
89/* Convert TM to a time_t value, assuming UTC.  */
90# if @REPLACE_TIMEGM@
91#  undef timegm
92#  define timegm rpl_timegm
93time_t timegm (struct tm *__tm);
94# endif
95
96/* Encourage applications to avoid unsafe functions that can overrun
97   buffers when given outlandish struct tm values.  Portable
98   applications should use strftime (or even sprintf) instead.  */
99# if GNULIB_PORTCHECK
100#  undef asctime
101#  define asctime eschew_asctime
102#  undef asctime_r
103#  define asctime_r eschew_asctime_r
104#  undef ctime
105#  define ctime eschew_ctime
106#  undef ctime_r
107#  define ctime_r eschew_ctime_r
108# endif
109
110# ifdef __cplusplus
111}
112# endif
113
114#endif
115