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 2, 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.  */
22#if defined __need_time_t || defined __need_clock_t || defined __need_timespec
23
24# if @HAVE_INCLUDE_NEXT@
25#  include_next <time.h>
26# else
27#  include @ABSOLUTE_TIME_H@
28# endif
29
30#else
31/* Normal invocation convention.  */
32
33# if ! defined _GL_TIME_H
34
35/* The include_next requires a split double-inclusion guard.  */
36#  if @HAVE_INCLUDE_NEXT@
37#   include_next <time.h>
38#  else
39#   include @ABSOLUTE_TIME_H@
40#  endif
41
42#  if ! defined _GL_TIME_H
43#   define _GL_TIME_H
44
45#   ifdef __cplusplus
46extern "C" {
47#   endif
48
49/* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3).
50   Or they define it with the wrong member names or define it in <sys/time.h>
51   (e.g., FreeBSD circa 1997).  */
52#   if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@
53#    if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
54#     include <sys/time.h>
55#    else
56#     undef timespec
57#     define timespec rpl_timespec
58struct timespec
59{
60  time_t tv_sec;
61  long int tv_nsec;
62};
63#    endif
64#   endif
65
66/* Sleep for at least RQTP seconds unless interrupted,  If interrupted,
67   return -1 and store the remaining time into RMTP.  See
68   <http://www.opengroup.org/susv3xsh/nanosleep.html>.  */
69#   if @REPLACE_NANOSLEEP@
70#    define nanosleep rpl_nanosleep
71int nanosleep (struct timespec const *__rqtp, struct timespec *__rmtp);
72#   endif
73
74/* Convert TIMER to RESULT, assuming local time and UTC respectively.  See
75   <http://www.opengroup.org/susv3xsh/localtime_r.html> and
76   <http://www.opengroup.org/susv3xsh/gmtime_r.html>.  */
77#   if @REPLACE_LOCALTIME_R@
78#    undef localtime_r
79#    define localtime_r rpl_localtime_r
80#    undef gmtime_r
81#    define gmtime_r rpl_gmtime_r
82struct tm *localtime_r (time_t const *restrict __timer,
83			struct tm *restrict __result);
84struct tm *gmtime_r (time_t const *restrict __timer,
85		     struct tm *restrict __result);
86#   endif
87
88/* Parse BUF as a time stamp, assuming FORMAT specifies its layout, and store
89   the resulting broken-down time into TM.  See
90   <http://www.opengroup.org/susv3xsh/strptime.html>.  */
91#   if @REPLACE_STRPTIME@
92#    undef strptime
93#    define strptime rpl_strptime
94char *strptime (char const *restrict __buf, char const *restrict __format,
95		struct tm *restrict __tm);
96#   endif
97
98/* Convert TM to a time_t value, assuming UTC.  */
99#   if @REPLACE_TIMEGM@
100#    undef timegm
101#    define timegm rpl_timegm
102time_t timegm (struct tm *__tm);
103#   endif
104
105/* Encourage applications to avoid unsafe functions that can overrun
106   buffers when given outlandish struct tm values.  Portable
107   applications should use strftime (or even sprintf) instead.  */
108#   if GNULIB_PORTCHECK
109#    undef asctime
110#    define asctime eschew_asctime
111#    undef asctime_r
112#    define asctime_r eschew_asctime_r
113#    undef ctime
114#    define ctime eschew_ctime
115#    undef ctime_r
116#    define ctime_r eschew_ctime_r
117#   endif
118
119#   ifdef __cplusplus
120}
121#   endif
122
123#  endif /* _GL_TIME_H */
124# endif /* _GL_TIME_H */
125#endif
126