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1 | /* A more-standard <time.h>. |
2 | ||
caf8a9b2 | 3 | Copyright (C) 2007-2012 Free Software Foundation, Inc. |
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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 | |
caf8a9b2 | 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
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17 | |
18 | #if __GNUC__ >= 3 | |
19 | @PRAGMA_SYSTEM_HEADER@ | |
20 | #endif | |
21 | @PRAGMA_COLUMNS@ | |
22 | ||
23 | /* Don't get in the way of glibc when it includes time.h merely to | |
24 | declare a few standard symbols, rather than to declare all the | |
25 | symbols. Also, Solaris 8 <time.h> eventually includes itself | |
26 | recursively; if that is happening, just include the system <time.h> | |
27 | without adding our own declarations. */ | |
28 | #if (defined __need_time_t || defined __need_clock_t \ | |
29 | || defined __need_timespec \ | |
6a3e57bb | 30 | || defined _@GUARD_PREFIX@_TIME_H) |
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31 | |
32 | # @INCLUDE_NEXT@ @NEXT_TIME_H@ | |
33 | ||
34 | #else | |
35 | ||
6a3e57bb | 36 | # define _@GUARD_PREFIX@_TIME_H |
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37 | |
38 | # @INCLUDE_NEXT@ @NEXT_TIME_H@ | |
39 | ||
40 | /* NetBSD 5.0 mis-defines NULL. */ | |
41 | # include <stddef.h> | |
42 | ||
43 | /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ | |
44 | ||
45 | /* The definition of _GL_ARG_NONNULL is copied here. */ | |
46 | ||
47 | /* The definition of _GL_WARN_ON_USE is copied here. */ | |
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). Stock Mingw does not define it, but the | |
52 | pthreads-win32 library defines it in <pthread.h>. */ | |
53 | # if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@ | |
54 | # if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@ | |
55 | # include <sys/time.h> | |
56 | # elif @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@ | |
57 | # include <pthread.h> | |
58 | /* The pthreads-win32 <pthread.h> also defines a couple of broken macros. */ | |
59 | # undef asctime_r | |
60 | # undef ctime_r | |
61 | # undef gmtime_r | |
62 | # undef localtime_r | |
63 | # undef rand_r | |
64 | # undef strtok_r | |
65 | # else | |
66 | ||
67 | # ifdef __cplusplus | |
68 | extern "C" { | |
69 | # endif | |
70 | ||
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71 | # if !GNULIB_defined_struct_timespec |
72 | # undef timespec | |
73 | # define timespec rpl_timespec | |
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74 | struct timespec |
75 | { | |
76 | time_t tv_sec; | |
77 | long int tv_nsec; | |
78 | }; | |
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79 | # define GNULIB_defined_struct_timespec 1 |
80 | # endif | |
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81 | |
82 | # ifdef __cplusplus | |
83 | } | |
84 | # endif | |
85 | ||
86 | # endif | |
87 | # endif | |
88 | ||
59578570 | 89 | # if !GNULIB_defined_struct_time_t_must_be_integral |
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90 | /* Per http://austingroupbugs.net/view.php?id=327, POSIX requires |
91 | time_t to be an integer type, even though C99 permits floating | |
92 | point. We don't know of any implementation that uses floating | |
93 | point, and it is much easier to write code that doesn't have to | |
94 | worry about that corner case, so we force the issue. */ | |
95 | struct __time_t_must_be_integral { | |
96 | unsigned int __floating_time_t_unsupported : (time_t) 1; | |
97 | }; | |
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98 | # define GNULIB_defined_struct_time_t_must_be_integral 1 |
99 | # endif | |
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100 | |
101 | /* Sleep for at least RQTP seconds unless interrupted, If interrupted, | |
102 | return -1 and store the remaining time into RMTP. See | |
103 | <http://www.opengroup.org/susv3xsh/nanosleep.html>. */ | |
104 | # if @GNULIB_NANOSLEEP@ | |
105 | # if @REPLACE_NANOSLEEP@ | |
106 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE) | |
107 | # define nanosleep rpl_nanosleep | |
108 | # endif | |
109 | _GL_FUNCDECL_RPL (nanosleep, int, | |
110 | (struct timespec const *__rqtp, struct timespec *__rmtp) | |
111 | _GL_ARG_NONNULL ((1))); | |
112 | _GL_CXXALIAS_RPL (nanosleep, int, | |
113 | (struct timespec const *__rqtp, struct timespec *__rmtp)); | |
114 | # else | |
115 | # if ! @HAVE_NANOSLEEP@ | |
116 | _GL_FUNCDECL_SYS (nanosleep, int, | |
117 | (struct timespec const *__rqtp, struct timespec *__rmtp) | |
118 | _GL_ARG_NONNULL ((1))); | |
119 | # endif | |
120 | _GL_CXXALIAS_SYS (nanosleep, int, | |
121 | (struct timespec const *__rqtp, struct timespec *__rmtp)); | |
122 | # endif | |
123 | _GL_CXXALIASWARN (nanosleep); | |
124 | # endif | |
125 | ||
126 | /* Return the 'time_t' representation of TP and normalize TP. */ | |
127 | # if @GNULIB_MKTIME@ | |
128 | # if @REPLACE_MKTIME@ | |
129 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE) | |
130 | # define mktime rpl_mktime | |
131 | # endif | |
132 | _GL_FUNCDECL_RPL (mktime, time_t, (struct tm *__tp) _GL_ARG_NONNULL ((1))); | |
133 | _GL_CXXALIAS_RPL (mktime, time_t, (struct tm *__tp)); | |
134 | # else | |
135 | _GL_CXXALIAS_SYS (mktime, time_t, (struct tm *__tp)); | |
136 | # endif | |
137 | _GL_CXXALIASWARN (mktime); | |
138 | # endif | |
139 | ||
140 | /* Convert TIMER to RESULT, assuming local time and UTC respectively. See | |
141 | <http://www.opengroup.org/susv3xsh/localtime_r.html> and | |
142 | <http://www.opengroup.org/susv3xsh/gmtime_r.html>. */ | |
143 | # if @GNULIB_TIME_R@ | |
144 | # if @REPLACE_LOCALTIME_R@ | |
145 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE) | |
146 | # undef localtime_r | |
147 | # define localtime_r rpl_localtime_r | |
148 | # endif | |
149 | _GL_FUNCDECL_RPL (localtime_r, struct tm *, (time_t const *restrict __timer, | |
150 | struct tm *restrict __result) | |
151 | _GL_ARG_NONNULL ((1, 2))); | |
152 | _GL_CXXALIAS_RPL (localtime_r, struct tm *, (time_t const *restrict __timer, | |
153 | struct tm *restrict __result)); | |
154 | # else | |
155 | # if ! @HAVE_DECL_LOCALTIME_R@ | |
156 | _GL_FUNCDECL_SYS (localtime_r, struct tm *, (time_t const *restrict __timer, | |
157 | struct tm *restrict __result) | |
158 | _GL_ARG_NONNULL ((1, 2))); | |
159 | # endif | |
160 | _GL_CXXALIAS_SYS (localtime_r, struct tm *, (time_t const *restrict __timer, | |
161 | struct tm *restrict __result)); | |
162 | # endif | |
163 | # if @HAVE_DECL_LOCALTIME_R@ | |
164 | _GL_CXXALIASWARN (localtime_r); | |
165 | # endif | |
166 | # if @REPLACE_LOCALTIME_R@ | |
167 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE) | |
168 | # undef gmtime_r | |
169 | # define gmtime_r rpl_gmtime_r | |
170 | # endif | |
171 | _GL_FUNCDECL_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer, | |
172 | struct tm *restrict __result) | |
173 | _GL_ARG_NONNULL ((1, 2))); | |
174 | _GL_CXXALIAS_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer, | |
175 | struct tm *restrict __result)); | |
176 | # else | |
177 | # if ! @HAVE_DECL_LOCALTIME_R@ | |
178 | _GL_FUNCDECL_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer, | |
179 | struct tm *restrict __result) | |
180 | _GL_ARG_NONNULL ((1, 2))); | |
181 | # endif | |
182 | _GL_CXXALIAS_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer, | |
183 | struct tm *restrict __result)); | |
184 | # endif | |
185 | # if @HAVE_DECL_LOCALTIME_R@ | |
186 | _GL_CXXALIASWARN (gmtime_r); | |
187 | # endif | |
188 | # endif | |
189 | ||
190 | /* Parse BUF as a time stamp, assuming FORMAT specifies its layout, and store | |
191 | the resulting broken-down time into TM. See | |
192 | <http://www.opengroup.org/susv3xsh/strptime.html>. */ | |
193 | # if @GNULIB_STRPTIME@ | |
194 | # if ! @HAVE_STRPTIME@ | |
195 | _GL_FUNCDECL_SYS (strptime, char *, (char const *restrict __buf, | |
196 | char const *restrict __format, | |
197 | struct tm *restrict __tm) | |
198 | _GL_ARG_NONNULL ((1, 2, 3))); | |
199 | # endif | |
200 | _GL_CXXALIAS_SYS (strptime, char *, (char const *restrict __buf, | |
201 | char const *restrict __format, | |
202 | struct tm *restrict __tm)); | |
203 | _GL_CXXALIASWARN (strptime); | |
204 | # endif | |
205 | ||
206 | /* Convert TM to a time_t value, assuming UTC. */ | |
207 | # if @GNULIB_TIMEGM@ | |
208 | # if @REPLACE_TIMEGM@ | |
209 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE) | |
210 | # undef timegm | |
211 | # define timegm rpl_timegm | |
212 | # endif | |
213 | _GL_FUNCDECL_RPL (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1))); | |
214 | _GL_CXXALIAS_RPL (timegm, time_t, (struct tm *__tm)); | |
215 | # else | |
216 | # if ! @HAVE_TIMEGM@ | |
217 | _GL_FUNCDECL_SYS (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1))); | |
218 | # endif | |
219 | _GL_CXXALIAS_SYS (timegm, time_t, (struct tm *__tm)); | |
220 | # endif | |
221 | _GL_CXXALIASWARN (timegm); | |
222 | # endif | |
223 | ||
224 | /* Encourage applications to avoid unsafe functions that can overrun | |
225 | buffers when given outlandish struct tm values. Portable | |
226 | applications should use strftime (or even sprintf) instead. */ | |
227 | # if defined GNULIB_POSIXCHECK | |
228 | # undef asctime | |
229 | _GL_WARN_ON_USE (asctime, "asctime can overrun buffers in some cases - " | |
230 | "better use strftime (or even sprintf) instead"); | |
231 | # endif | |
232 | # if defined GNULIB_POSIXCHECK | |
233 | # undef asctime_r | |
234 | _GL_WARN_ON_USE (asctime, "asctime_r can overrun buffers in some cases - " | |
235 | "better use strftime (or even sprintf) instead"); | |
236 | # endif | |
237 | # if defined GNULIB_POSIXCHECK | |
238 | # undef ctime | |
239 | _GL_WARN_ON_USE (asctime, "ctime can overrun buffers in some cases - " | |
240 | "better use strftime (or even sprintf) instead"); | |
241 | # endif | |
242 | # if defined GNULIB_POSIXCHECK | |
243 | # undef ctime_r | |
244 | _GL_WARN_ON_USE (asctime, "ctime_r can overrun buffers in some cases - " | |
245 | "better use strftime (or even sprintf) instead"); | |
246 | # endif | |
247 | ||
248 | #endif |