1 /* A more-standard <time.h>. 2 3 Copyright (C) 2007-2017 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 Lesser 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser 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. (However, skip this for MinGW as it treats __need_time_t 26 incompatibly.) 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 __MINGW32__) \ 32 || defined _@GUARD_PREFIX@_TIME_H) 33 34 # @INCLUDE_NEXT@ @NEXT_TIME_H@ 35 36 #else 37 38 # define _@GUARD_PREFIX@_TIME_H 39 40 # @INCLUDE_NEXT@ @NEXT_TIME_H@ 41 42 /* NetBSD 5.0 mis-defines NULL. */ 43 # include <stddef.h> 44 45 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ 46 47 /* The definition of _GL_ARG_NONNULL is copied here. */ 48 49 /* The definition of _GL_WARN_ON_USE is copied here. */ 50 51 /* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3). 52 Or they define it with the wrong member names or define it in <sys/time.h> 53 (e.g., FreeBSD circa 1997). Stock Mingw prior to 3.0 does not define it, 54 but the pthreads-win32 library defines it in <pthread.h>. */ 55 # if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@ 56 # if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@ 57 # include <sys/time.h> 58 # elif @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@ 59 # include <pthread.h> 60 # elif @UNISTD_H_DEFINES_STRUCT_TIMESPEC@ 61 # include <unistd.h> 62 # else 63 64 # ifdef __cplusplus 65 extern "C" { 66 # endif 67 68 # if !GNULIB_defined_struct_timespec 69 # undef timespec 70 # define timespec rpl_timespec 71 struct timespec 72 { 73 time_t tv_sec; 74 long int tv_nsec; 75 }; 76 # define GNULIB_defined_struct_timespec 1 77 # endif 78 79 # ifdef __cplusplus 80 } 81 # endif 82 83 # endif 84 # endif 85 86 # if !GNULIB_defined_struct_time_t_must_be_integral 87 /* Per http://austingroupbugs.net/view.php?id=327, POSIX requires 88 time_t to be an integer type, even though C99 permits floating 89 point. We don't know of any implementation that uses floating 90 point, and it is much easier to write code that doesn't have to 91 worry about that corner case, so we force the issue. */ 92 struct __time_t_must_be_integral { 93 unsigned int __floating_time_t_unsupported : (time_t) 1; 94 }; 95 # define GNULIB_defined_struct_time_t_must_be_integral 1 96 # endif 97 98 /* Sleep for at least RQTP seconds unless interrupted, If interrupted, 99 return -1 and store the remaining time into RMTP. See 100 <http://www.opengroup.org/susv3xsh/nanosleep.html>. */ 101 # if @GNULIB_NANOSLEEP@ 102 # if @REPLACE_NANOSLEEP@ 103 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 104 # define nanosleep rpl_nanosleep 105 # endif 106 _GL_FUNCDECL_RPL (nanosleep, int, 107 (struct timespec const *__rqtp, struct timespec *__rmtp) 108 _GL_ARG_NONNULL ((1))); 109 _GL_CXXALIAS_RPL (nanosleep, int, 110 (struct timespec const *__rqtp, struct timespec *__rmtp)); 111 # else 112 # if ! @HAVE_NANOSLEEP@ 113 _GL_FUNCDECL_SYS (nanosleep, int, 114 (struct timespec const *__rqtp, struct timespec *__rmtp) 115 _GL_ARG_NONNULL ((1))); 116 # endif 117 _GL_CXXALIAS_SYS (nanosleep, int, 118 (struct timespec const *__rqtp, struct timespec *__rmtp)); 119 # endif 120 _GL_CXXALIASWARN (nanosleep); 121 # endif 122 123 /* Return the 'time_t' representation of TP and normalize TP. */ 124 # if @GNULIB_MKTIME@ 125 # if @REPLACE_MKTIME@ 126 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 127 # define mktime rpl_mktime 128 # endif 129 _GL_FUNCDECL_RPL (mktime, time_t, (struct tm *__tp) _GL_ARG_NONNULL ((1))); 130 _GL_CXXALIAS_RPL (mktime, time_t, (struct tm *__tp)); 131 # else 132 _GL_CXXALIAS_SYS (mktime, time_t, (struct tm *__tp)); 133 # endif 134 _GL_CXXALIASWARN (mktime); 135 # endif 136 137 /* Convert TIMER to RESULT, assuming local time and UTC respectively. See 138 <http://www.opengroup.org/susv3xsh/localtime_r.html> and 139 <http://www.opengroup.org/susv3xsh/gmtime_r.html>. */ 140 # if @GNULIB_TIME_R@ 141 # if @REPLACE_LOCALTIME_R@ 142 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 143 # undef localtime_r 144 # define localtime_r rpl_localtime_r 145 # endif 146 _GL_FUNCDECL_RPL (localtime_r, struct tm *, (time_t const *restrict __timer, 147 struct tm *restrict __result) 148 _GL_ARG_NONNULL ((1, 2))); 149 _GL_CXXALIAS_RPL (localtime_r, struct tm *, (time_t const *restrict __timer, 150 struct tm *restrict __result)); 151 # else 152 # if ! @HAVE_DECL_LOCALTIME_R@ 153 _GL_FUNCDECL_SYS (localtime_r, struct tm *, (time_t const *restrict __timer, 154 struct tm *restrict __result) 155 _GL_ARG_NONNULL ((1, 2))); 156 # endif 157 _GL_CXXALIAS_SYS (localtime_r, struct tm *, (time_t const *restrict __timer, 158 struct tm *restrict __result)); 159 # endif 160 # if @HAVE_DECL_LOCALTIME_R@ 161 _GL_CXXALIASWARN (localtime_r); 162 # endif 163 # if @REPLACE_LOCALTIME_R@ 164 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 165 # undef gmtime_r 166 # define gmtime_r rpl_gmtime_r 167 # endif 168 _GL_FUNCDECL_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer, 169 struct tm *restrict __result) 170 _GL_ARG_NONNULL ((1, 2))); 171 _GL_CXXALIAS_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer, 172 struct tm *restrict __result)); 173 # else 174 # if ! @HAVE_DECL_LOCALTIME_R@ 175 _GL_FUNCDECL_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer, 176 struct tm *restrict __result) 177 _GL_ARG_NONNULL ((1, 2))); 178 # endif 179 _GL_CXXALIAS_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer, 180 struct tm *restrict __result)); 181 # endif 182 # if @HAVE_DECL_LOCALTIME_R@ 183 _GL_CXXALIASWARN (gmtime_r); 184 # endif 185 # endif 186 187 /* Convert TIMER to RESULT, assuming local time and UTC respectively. See 188 <http://www.opengroup.org/susv3xsh/localtime.html> and 189 <http://www.opengroup.org/susv3xsh/gmtime.html>. */ 190 # if @GNULIB_GETTIMEOFDAY@ 191 # if @REPLACE_LOCALTIME@ 192 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 193 # undef localtime 194 # define localtime rpl_localtime 195 # endif 196 _GL_FUNCDECL_RPL (localtime, struct tm *, (time_t const *__timer) 197 _GL_ARG_NONNULL ((1))); 198 _GL_CXXALIAS_RPL (localtime, struct tm *, (time_t const *__timer)); 199 # else 200 _GL_CXXALIAS_SYS (localtime, struct tm *, (time_t const *__timer)); 201 # endif 202 _GL_CXXALIASWARN (localtime); 203 # endif 204 205 # if @GNULIB_GETTIMEOFDAY@ 206 # if @REPLACE_GMTIME@ 207 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 208 # undef gmtime 209 # define gmtime rpl_gmtime 210 # endif 211 _GL_FUNCDECL_RPL (gmtime, struct tm *, (time_t const *__timer) 212 _GL_ARG_NONNULL ((1))); 213 _GL_CXXALIAS_RPL (gmtime, struct tm *, (time_t const *__timer)); 214 # else 215 _GL_CXXALIAS_SYS (gmtime, struct tm *, (time_t const *__timer)); 216 # endif 217 _GL_CXXALIASWARN (gmtime); 218 # endif 219 220 /* Parse BUF as a timestamp, assuming FORMAT specifies its layout, and store 221 the resulting broken-down time into TM. See 222 <http://www.opengroup.org/susv3xsh/strptime.html>. */ 223 # if @GNULIB_STRPTIME@ 224 # if ! @HAVE_STRPTIME@ 225 _GL_FUNCDECL_SYS (strptime, char *, (char const *restrict __buf, 226 char const *restrict __format, 227 struct tm *restrict __tm) 228 _GL_ARG_NONNULL ((1, 2, 3))); 229 # endif 230 _GL_CXXALIAS_SYS (strptime, char *, (char const *restrict __buf, 231 char const *restrict __format, 232 struct tm *restrict __tm)); 233 _GL_CXXALIASWARN (strptime); 234 # endif 235 236 # if defined _GNU_SOURCE && @GNULIB_TIME_RZ@ && ! @HAVE_TIMEZONE_T@ 237 typedef struct tm_zone *timezone_t; 238 _GL_FUNCDECL_SYS (tzalloc, timezone_t, (char const *__name)); 239 _GL_CXXALIAS_SYS (tzalloc, timezone_t, (char const *__name)); 240 _GL_FUNCDECL_SYS (tzfree, void, (timezone_t __tz)); 241 _GL_CXXALIAS_SYS (tzfree, void, (timezone_t __tz)); 242 _GL_FUNCDECL_SYS (localtime_rz, struct tm *, 243 (timezone_t __tz, time_t const *restrict __timer, 244 struct tm *restrict __result) _GL_ARG_NONNULL ((2, 3))); 245 _GL_CXXALIAS_SYS (localtime_rz, struct tm *, 246 (timezone_t __tz, time_t const *restrict __timer, 247 struct tm *restrict __result)); 248 _GL_FUNCDECL_SYS (mktime_z, time_t, 249 (timezone_t __tz, struct tm *restrict __result) 250 _GL_ARG_NONNULL ((2))); 251 _GL_CXXALIAS_SYS (mktime_z, time_t, 252 (timezone_t __tz, struct tm *restrict __result)); 253 # endif 254 255 /* Convert TM to a time_t value, assuming UTC. */ 256 # if @GNULIB_TIMEGM@ 257 # if @REPLACE_TIMEGM@ 258 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 259 # undef timegm 260 # define timegm rpl_timegm 261 # endif 262 _GL_FUNCDECL_RPL (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1))); 263 _GL_CXXALIAS_RPL (timegm, time_t, (struct tm *__tm)); 264 # else 265 # if ! @HAVE_TIMEGM@ 266 _GL_FUNCDECL_SYS (timegm, time_t, (struct tm *__tm) _GL_ARG_NONNULL ((1))); 267 # endif 268 _GL_CXXALIAS_SYS (timegm, time_t, (struct tm *__tm)); 269 # endif 270 _GL_CXXALIASWARN (timegm); 271 # endif 272 273 /* Encourage applications to avoid unsafe functions that can overrun 274 buffers when given outlandish struct tm values. Portable 275 applications should use strftime (or even sprintf) instead. */ 276 # if defined GNULIB_POSIXCHECK 277 # undef asctime 278 _GL_WARN_ON_USE (asctime, "asctime can overrun buffers in some cases - " 279 "better use strftime (or even sprintf) instead"); 280 # endif 281 # if defined GNULIB_POSIXCHECK 282 # undef asctime_r 283 _GL_WARN_ON_USE (asctime, "asctime_r can overrun buffers in some cases - " 284 "better use strftime (or even sprintf) instead"); 285 # endif 286 # if defined GNULIB_POSIXCHECK 287 # undef ctime 288 _GL_WARN_ON_USE (asctime, "ctime can overrun buffers in some cases - " 289 "better use strftime (or even sprintf) instead"); 290 # endif 291 # if defined GNULIB_POSIXCHECK 292 # undef ctime_r 293 _GL_WARN_ON_USE (asctime, "ctime_r can overrun buffers in some cases - " 294 "better use strftime (or even sprintf) instead"); 295 # endif 296 297 #endif 298