1 /* A more-standard <time.h>. 2 3 Copyright (C) 2007-2012 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, see <http://www.gnu.org/licenses/>. */ 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 \ 30 || defined _@GUARD_PREFIX@_TIME_H) 31 32 # @INCLUDE_NEXT@ @NEXT_TIME_H@ 33 34 #else 35 36 # define _@GUARD_PREFIX@_TIME_H 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 71 # if !GNULIB_defined_struct_timespec 72 # undef timespec 73 # define timespec rpl_timespec 74 struct timespec 75 { 76 time_t tv_sec; 77 long int tv_nsec; 78 }; 79 # define GNULIB_defined_struct_timespec 1 80 # endif 81 82 # ifdef __cplusplus 83 } 84 # endif 85 86 # endif 87 # endif 88 89 # if !GNULIB_defined_struct_time_t_must_be_integral 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 }; 98 # define GNULIB_defined_struct_time_t_must_be_integral 1 99 # endif 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 249
