1: /* A more-standard <time.h>.
2:
3: Copyright (C) 2007-2011 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: #if __GNUC__ >= 3
20: @PRAGMA_SYSTEM_HEADER@
21: #endif
22: @PRAGMA_COLUMNS@
23:
24: /* Don't get in the way of glibc when it includes time.h merely to
25: declare a few standard symbols, rather than to declare all the
26: symbols. Also, Solaris 8 <time.h> eventually includes itself
27: recursively; if that is happening, just include the system <time.h>
28: without adding our own declarations. */
29: #if (defined __need_time_t || defined __need_clock_t \
30: || defined __need_timespec \
31: || defined _@GUARD_PREFIX@_TIME_H)
32:
33: # @INCLUDE_NEXT@ @NEXT_TIME_H@
34:
35: #else
36:
37: # define _@GUARD_PREFIX@_TIME_H
38:
39: # @INCLUDE_NEXT@ @NEXT_TIME_H@
40:
41: /* NetBSD 5.0 mis-defines NULL. */
42: # include <stddef.h>
43:
44: /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
45:
46: /* The definition of _GL_ARG_NONNULL is copied here. */
47:
48: /* The definition of _GL_WARN_ON_USE is copied here. */
49:
50: /* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3).
51: Or they define it with the wrong member names or define it in <sys/time.h>
52: (e.g., FreeBSD circa 1997). Stock Mingw does not define it, but the
53: pthreads-win32 library defines it in <pthread.h>. */
54: # if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@
55: # if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
56: # include <sys/time.h>
57: # elif @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
58: # include <pthread.h>
59: /* The pthreads-win32 <pthread.h> also defines a couple of broken macros. */
60: # undef asctime_r
61: # undef ctime_r
62: # undef gmtime_r
63: # undef localtime_r
64: # undef rand_r
65: # undef strtok_r
66: # else
67:
68: # ifdef __cplusplus
69: extern "C" {
70: # endif
71:
72: # if !GNULIB_defined_struct_timespec
73: # undef timespec
74: # define timespec rpl_timespec
75: struct timespec
76: {
77: time_t tv_sec;
78: long int tv_nsec;
79: };
80: # define GNULIB_defined_struct_timespec 1
81: # endif
82:
83: # ifdef __cplusplus
84: }
85: # endif
86:
87: # endif
88: # endif
89:
90: # if !GNULIB_defined_struct_time_t_must_be_integral
91: /* Per http://austingroupbugs.net/view.php?id=327, POSIX requires
92: time_t to be an integer type, even though C99 permits floating
93: point. We don't know of any implementation that uses floating
94: point, and it is much easier to write code that doesn't have to
95: worry about that corner case, so we force the issue. */
96: struct __time_t_must_be_integral {
97: unsigned int __floating_time_t_unsupported : (time_t) 1;
98: };
99: # define GNULIB_defined_struct_time_t_must_be_integral 1
100: # endif
101:
102: /* Sleep for at least RQTP seconds unless interrupted, If interrupted,
103: return -1 and store the remaining time into RMTP. See
104: <http://www.opengroup.org/susv3xsh/nanosleep.html>. */
105: # if @GNULIB_NANOSLEEP@
106: # if @REPLACE_NANOSLEEP@
107: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
108: # define nanosleep rpl_nanosleep
109: # endif
110: _GL_FUNCDECL_RPL (nanosleep, int,
111: (struct timespec const *__rqtp, struct timespec *__rmtp)
112: _GL_ARG_NONNULL ((1)));
113: _GL_CXXALIAS_RPL (nanosleep, int,
114: (struct timespec const *__rqtp, struct timespec *__rmtp));
115: # else
116: # if ! @HAVE_NANOSLEEP@
117: _GL_FUNCDECL_SYS (nanosleep, int,
118: (struct timespec const *__rqtp, struct timespec *__rmtp)
119: _GL_ARG_NONNULL ((1)));
120: # endif
121: _GL_CXXALIAS_SYS (nanosleep, int,
122: (struct timespec const *__rqtp, struct timespec *__rmtp));
123: # endif
124: _GL_CXXALIASWARN (nanosleep);
125: # endif
126:
127: /* Return the 'time_t' representation of TP and normalize TP. */
128: # if @GNULIB_MKTIME@
129: # if @REPLACE_MKTIME@
130: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
131: # define mktime rpl_mktime
132: # endif
133: _GL_FUNCDECL_RPL (mktime, time_t, (struct tm *__tp) _GL_ARG_NONNULL ((1)));
134: _GL_CXXALIAS_RPL (mktime, time_t, (struct tm *__tp));
135: # else
136: _GL_CXXALIAS_SYS (mktime, time_t, (struct tm *__tp));
137: # endif
138: _GL_CXXALIASWARN (mktime);
139: # endif
140:
141: /* Convert TIMER to RESULT, assuming local time and UTC respectively. See
142: <http://www.opengroup.org/susv3xsh/localtime_r.html> and
143: <http://www.opengroup.org/susv3xsh/gmtime_r.html>. */
144: # if @GNULIB_TIME_R@
145: # if @REPLACE_LOCALTIME_R@
146: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
147: # undef localtime_r
148: # define localtime_r rpl_localtime_r
149: # endif
150: _GL_FUNCDECL_RPL (localtime_r, struct tm *, (time_t const *restrict __timer,
151: struct tm *restrict __result)
152: _GL_ARG_NONNULL ((1, 2)));
153: _GL_CXXALIAS_RPL (localtime_r, struct tm *, (time_t const *restrict __timer,
154: struct tm *restrict __result));
155: # else
156: # if ! @HAVE_DECL_LOCALTIME_R@
157: _GL_FUNCDECL_SYS (localtime_r, struct tm *, (time_t const *restrict __timer,
158: struct tm *restrict __result)
159: _GL_ARG_NONNULL ((1, 2)));
160: # endif
161: _GL_CXXALIAS_SYS (localtime_r, struct tm *, (time_t const *restrict __timer,
162: struct tm *restrict __result));
163: # endif
164: # if @HAVE_DECL_LOCALTIME_R@
165: _GL_CXXALIASWARN (localtime_r);
166: # endif
167: # if @REPLACE_LOCALTIME_R@
168: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
169: # undef gmtime_r
170: # define gmtime_r rpl_gmtime_r
171: # endif
172: _GL_FUNCDECL_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer,
173: struct tm *restrict __result)
174: _GL_ARG_NONNULL ((1, 2)));
175: _GL_CXXALIAS_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer,
176: struct tm *restrict __result));
177: # else
178: # if ! @HAVE_DECL_LOCALTIME_R@
179: _GL_FUNCDECL_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer,
180: struct tm *restrict __result)
181: _GL_ARG_NONNULL ((1, 2)));
182: # endif
183: _GL_CXXALIAS_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer,
184: struct tm *restrict __result));
185: # endif
186: # if @HAVE_DECL_LOCALTIME_R@
187: _GL_CXXALIASWARN (gmtime_r);
188: # endif
189: # endif
190:
191: /* Parse BUF as a time stamp, assuming FORMAT specifies its layout, and store
192: the resulting broken-down time into TM. See
193: <http://www.opengroup.org/susv3xsh/strptime.html>. */
194: # if @GNULIB_STRPTIME@
195: # if ! @HAVE_STRPTIME@
196: _GL_FUNCDECL_SYS (strptime, char *, (char const *restrict __buf,
197: char const *restrict __format,
198: struct tm *restrict __tm)
199: _GL_ARG_NONNULL ((1, 2, 3)));
200: # endif
201: _GL_CXXALIAS_SYS (strptime, char *, (char const *restrict __buf,
202: char const *restrict __format,
203: struct tm *restrict __tm));
204: _GL_CXXALIASWARN (strptime);
205: # endif
206:
207: /* Convert TM to a time_t value, assuming UTC. */
208: # if @GNULIB_TIMEGM@
209: # if @REPLACE_TIMEGM@
210: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
211: # undef timegm
212: # define timegm rpl_timegm
213: # endif
214: _GL_FUNCDECL_RPL (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1)));
215: _GL_CXXALIAS_RPL (timegm, time_t, (struct tm *__tm));
216: # else
217: # if ! @HAVE_TIMEGM@
218: _GL_FUNCDECL_SYS (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1)));
219: # endif
220: _GL_CXXALIAS_SYS (timegm, time_t, (struct tm *__tm));
221: # endif
222: _GL_CXXALIASWARN (timegm);
223: # endif
224:
225: /* Encourage applications to avoid unsafe functions that can overrun
226: buffers when given outlandish struct tm values. Portable
227: applications should use strftime (or even sprintf) instead. */
228: # if defined GNULIB_POSIXCHECK
229: # undef asctime
230: _GL_WARN_ON_USE (asctime, "asctime can overrun buffers in some cases - "
231: "better use strftime (or even sprintf) instead");
232: # endif
233: # if defined GNULIB_POSIXCHECK
234: # undef asctime_r
235: _GL_WARN_ON_USE (asctime, "asctime_r can overrun buffers in some cases - "
236: "better use strftime (or even sprintf) instead");
237: # endif
238: # if defined GNULIB_POSIXCHECK
239: # undef ctime
240: _GL_WARN_ON_USE (asctime, "ctime can overrun buffers in some cases - "
241: "better use strftime (or even sprintf) instead");
242: # endif
243: # if defined GNULIB_POSIXCHECK
244: # undef ctime_r
245: _GL_WARN_ON_USE (asctime, "ctime_r can overrun buffers in some cases - "
246: "better use strftime (or even sprintf) instead");
247: # endif
248:
249: #endif
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