1 /* Copyright (C) 1991-1999,2000,2001,2002,2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 * ISO C99 Standard: 7.23 Date and time <time.h>
25 #if (! defined __need_time_t && !defined __need_clock_t && \
26 ! defined __need_timespec)
28 # include <features.h>
35 /* Get size_t and NULL from <stddef.h>. */
36 # define __need_size_t
40 /* This defines CLOCKS_PER_SEC, which is the number of processor clock
42 # include <bits/time.h>
44 /* This is the obsolete POSIX.1-1988 name for the same constant. */
45 # if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
47 # define CLK_TCK CLOCKS_PER_SEC
51 #endif /* <time.h> included. */
53 #if !defined __clock_t_defined && (defined _TIME_H || defined __need_clock_t)
54 # define __clock_t_defined 1
56 # include <bits/types.h>
59 /* Returned by `clock'. */
60 typedef __clock_t clock_t;
62 #if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC
63 __USING_NAMESPACE_STD(clock_t)
66 #endif /* clock_t not defined and <time.h> or need clock_t. */
69 #if !defined __time_t_defined && (defined _TIME_H || defined __need_time_t)
70 # define __time_t_defined 1
72 # include <bits/types.h>
75 /* Returned by `time'. */
76 typedef __time_t time_t;
78 #if defined __USE_POSIX || defined __USE_MISC || defined __USE_SVID
79 __USING_NAMESPACE_STD(time_t)
82 #endif /* time_t not defined and <time.h> or need time_t. */
85 #if !defined __clockid_t_defined && \
86 ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_clockid_t)
87 # define __clockid_t_defined 1
89 # include <bits/types.h>
91 /* Clock ID used in clock and timer functions. */
92 typedef __clockid_t clockid_t;
94 #endif /* clockid_t not defined and <time.h> or need clockid_t. */
95 #undef __clockid_time_t
97 #if !defined __timer_t_defined && \
98 ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_timer_t)
99 # define __timer_t_defined 1
101 # include <bits/types.h>
103 /* Timer ID returned by `timer_create'. */
104 typedef __timer_t timer_t;
106 #endif /* timer_t not defined and <time.h> or need timer_t. */
107 #undef __need_timer_t
110 #if !defined __timespec_defined && \
111 ((defined _TIME_H && \
112 (defined __USE_POSIX199309 || defined __USE_MISC)) || \
113 defined __need_timespec)
114 # define __timespec_defined 1
116 /* POSIX.1b structure for a time value. This is like a `struct timeval' but
117 has nanoseconds instead of microseconds. */
120 __time_t tv_sec; /* Seconds. */
121 long int tv_nsec; /* Nanoseconds. */
124 #endif /* timespec not defined and <time.h> or need timespec. */
125 #undef __need_timespec
129 __BEGIN_NAMESPACE_STD
130 /* Used by other time functions. */
133 int tm_sec; /* Seconds. [0-60] (1 leap second) */
134 int tm_min; /* Minutes. [0-59] */
135 int tm_hour; /* Hours. [0-23] */
136 int tm_mday; /* Day. [1-31] */
137 int tm_mon; /* Month. [0-11] */
138 int tm_year; /* Year - 1900. */
139 int tm_wday; /* Day of week. [0-6] */
140 int tm_yday; /* Days in year.[0-365] */
141 int tm_isdst; /* DST. [-1/0/1]*/
143 #ifdef __UCLIBC_HAS_TM_EXTENSIONS__
145 long int tm_gmtoff; /* Seconds east of UTC. */
146 __const char *tm_zone; /* Timezone abbreviation. */
148 long int __tm_gmtoff; /* Seconds east of UTC. */
149 __const char *__tm_zone; /* Timezone abbreviation. */
151 #endif /* __UCLIBC_HAS_TM_EXTENSIONS__ */
154 #if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC
155 __USING_NAMESPACE_STD(tm)
159 #ifdef __USE_POSIX199309
160 /* POSIX.1b structure for timer start values and intervals. */
163 struct timespec it_interval;
164 struct timespec it_value;
167 /* We can use a simple forward declaration. */
170 #endif /* POSIX.1b */
173 # ifndef __pid_t_defined
174 typedef __pid_t pid_t;
175 # define __pid_t_defined
180 __BEGIN_NAMESPACE_STD
181 /* Time used by the program so far (user time + system time).
182 The result / CLOCKS_PER_SECOND is program time in seconds. */
183 extern clock_t clock (void) __THROW;
185 /* Return the current time and put it in *TIMER if TIMER is not NULL. */
186 extern time_t time (time_t *__timer) __THROW;
188 #ifdef __UCLIBC_HAS_FLOATS__
189 /* Return the difference between TIME1 and TIME0. */
190 extern double difftime (time_t __time1, time_t __time0)
191 __THROW __attribute__ ((__const__));
192 #endif /* __UCLIBC_HAS_FLOATS__ */
194 /* Return the `time_t' representation of TP and normalize TP. */
195 extern time_t mktime (struct tm *__tp) __THROW;
198 /* Format TP into S according to FORMAT.
199 Write no more than MAXSIZE characters and return the number
200 of characters written, or 0 if it would exceed MAXSIZE. */
201 extern size_t strftime (char *__restrict __s, size_t __maxsize,
202 __const char *__restrict __format,
203 __const struct tm *__restrict __tp) __THROW;
207 /* Parse S according to FORMAT and store binary time information in TP.
208 The return value is a pointer to the first unparsed character in S. */
209 extern char *strptime (__const char *__restrict __s,
210 __const char *__restrict __fmt, struct tm *__tp)
214 #ifdef __UCLIBC_HAS_XLOCALE__
216 /* Similar to the two functions above but take the information from
217 the provided locale and not the global locale. */
218 # include <xlocale.h>
220 extern size_t strftime_l (char *__restrict __s, size_t __maxsize,
221 __const char *__restrict __format,
222 __const struct tm *__restrict __tp,
223 __locale_t __loc) __THROW;
225 extern char *strptime_l (__const char *__restrict __s,
226 __const char *__restrict __fmt, struct tm *__tp,
227 __locale_t __loc) __THROW;
232 __BEGIN_NAMESPACE_STD
233 /* Return the `struct tm' representation of *TIMER
234 in Universal Coordinated Time (aka Greenwich Mean Time). */
235 extern struct tm *gmtime (__const time_t *__timer) __THROW;
237 /* Return the `struct tm' representation
238 of *TIMER in the local timezone. */
239 extern struct tm *localtime (__const time_t *__timer) __THROW;
242 # if defined __USE_POSIX || defined __USE_MISC
243 /* Return the `struct tm' representation of *TIMER in UTC,
244 using *TP to store the result. */
245 extern struct tm *gmtime_r (__const time_t *__restrict __timer,
246 struct tm *__restrict __tp) __THROW;
248 /* Return the `struct tm' representation of *TIMER in local time,
249 using *TP to store the result. */
250 extern struct tm *localtime_r (__const time_t *__restrict __timer,
251 struct tm *__restrict __tp) __THROW;
252 # endif /* POSIX or misc */
254 __BEGIN_NAMESPACE_STD
255 /* Return a string of the form "Day Mon dd hh:mm:ss yyyy\n"
256 that is the representation of TP in this format. */
257 extern char *asctime (__const struct tm *__tp) __THROW;
259 /* Equivalent to `asctime (localtime (timer))'. */
260 extern char *ctime (__const time_t *__timer) __THROW;
263 # if defined __USE_POSIX || defined __USE_MISC
264 /* Reentrant versions of the above functions. */
266 /* Return in BUF a string of the form "Day Mon dd hh:mm:ss yyyy\n"
267 that is the representation of TP in this format. */
268 extern char *asctime_r (__const struct tm *__restrict __tp,
269 char *__restrict __buf) __THROW;
271 /* Equivalent to `asctime_r (localtime_r (timer, *TMP*), buf)'. */
272 extern char *ctime_r (__const time_t *__restrict __timer,
273 char *__restrict __buf) __THROW;
274 # endif /* POSIX or misc */
277 /* Defined in localtime.c. */
278 #ifdef __UCLIBC_MJN3_ONLY__
279 #warning "mjn3 FIXME: __tzname, __daylight, and __timezone have a prototype but are not defined."
280 extern char *__tzname[2]; /* Current timezone names. */
281 extern int __daylight; /* If daylight-saving time is ever in use. */
282 extern long int __timezone; /* Seconds west of UTC. */
283 #endif /* __UCLIBC_MJN3_ONLY__ */
288 extern char *tzname[2];
290 /* Set time conversion information from the TZ environment variable.
291 If TZ is not defined, a locale-dependent default is used. */
292 extern void tzset (void) __THROW;
295 # if defined __USE_SVID || defined __USE_XOPEN
297 extern long int timezone;
301 /* Set the system time to *WHEN.
302 This call is restricted to the superuser. */
303 extern int stime (__const time_t *__when) __THROW;
307 /* Nonzero if YEAR is a leap year (every 4 years,
308 except every 100th isn't, and every 400th is). */
309 # define __isleap(year) \
310 ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
314 /* Miscellaneous functions many Unices inherited from the public domain
315 localtime package. These are included only for compatibility. */
317 /* Like `mktime', but for TP represents Universal Time, not local time. */
318 extern time_t timegm (struct tm *__tp) __THROW;
320 /* Another name for `mktime'. */
321 extern time_t timelocal (struct tm *__tp) __THROW;
323 /* Return the number of days in YEAR. */
324 extern int dysize (int __year) __THROW __attribute__ ((__const__));
328 # ifdef __USE_POSIX199309
329 /* Pause execution for a number of nanoseconds.
331 This function is a cancellation point and therefore not marked with
333 extern int nanosleep (__const struct timespec *__requested_time,
334 struct timespec *__remaining);
337 /* Get resolution of clock CLOCK_ID. */
338 extern int clock_getres (clockid_t __clock_id, struct timespec *__res) __THROW;
340 /* Get current value of clock CLOCK_ID and store it in TP. */
341 extern int clock_gettime (clockid_t __clock_id, struct timespec *__tp) __THROW;
343 /* Set clock CLOCK_ID to value TP. */
344 extern int clock_settime (clockid_t __clock_id, __const struct timespec *__tp) __THROW;
346 #ifdef __UCLIBC_MJN3_ONLY__
347 #warning "mjn3 FIXME: a bunch of unimplemented function prototypes."
348 # ifdef __USE_XOPEN2K
349 /* High-resolution sleep with the specified clock.
351 This function is a cancellation point and therefore not marked with
353 extern int clock_nanosleep (clockid_t __clock_id, int __flags,
354 __const struct timespec *__req,
355 struct timespec *__rem);
357 /* Return clock ID for CPU-time clock. */
358 extern int clock_getcpuclockid (pid_t __pid, clockid_t *__clock_id) __THROW;
362 /* Create new per-process timer using CLOCK_ID. */
363 extern int timer_create (clockid_t __clock_id,
364 struct sigevent *__restrict __evp,
365 timer_t *__restrict __timerid) __THROW;
367 /* Delete timer TIMERID. */
368 extern int timer_delete (timer_t __timerid) __THROW;
370 /* Set timer TIMERID to VALUE, returning old value in OVLAUE. */
371 extern int timer_settime (timer_t __timerid, int __flags,
372 __const struct itimerspec *__restrict __value,
373 struct itimerspec *__restrict __ovalue) __THROW;
375 /* Get current value of timer TIMERID and store it in VLAUE. */
376 extern int timer_gettime (timer_t __timerid, struct itimerspec *__value)
379 /* Get expiration overrun for timer TIMERID. */
380 extern int timer_getoverrun (timer_t __timerid) __THROW;
381 #endif /* __UCLIBC_MJN3_ONLY__ */
385 #ifdef __UCLIBC_MJN3_ONLY__
386 #warning "mjn3 FIXME: a bunch of unimplemented function prototypes."
387 # ifdef __USE_XOPEN_EXTENDED
388 /* Set to one of the following values to indicate an error.
389 1 the DATEMSK environment variable is null or undefined,
390 2 the template file cannot be opened for reading,
391 3 failed to get file status information,
392 4 the template file is not a regular file,
393 5 an error is encountered while reading the template file,
394 6 memory allication failed (not enough memory available),
395 7 there is no line in the template that matches the input,
396 8 invalid input specification Example: February 31 or a time is
397 specified that can not be represented in a time_t (representing
398 the time in seconds since 00:00:00 UTC, January 1, 1970) */
399 extern int getdate_err;
401 /* Parse the given string as a date specification and return a value
402 representing the value. The templates from the file identified by
403 the environment variable DATEMSK are used. In case of an error
404 `getdate_err' is set.
406 This function is a possible cancellation points and therefore not
407 marked with __THROW. */
408 extern struct tm *getdate (__const char *__string);
412 /* Since `getdate' is not reentrant because of the use of `getdate_err'
413 and the static buffer to return the result in, we provide a thread-safe
414 variant. The functionality is the same. The result is returned in
415 the buffer pointed to by RESBUFP and in case of an error the return
416 value is != 0 with the same values as given above for `getdate_err'.
418 This function is not part of POSIX and therefore no official
419 cancellation point. But due to similarity with an POSIX interface
420 or due to the implementation it is a cancellation point and
421 therefore not marked with __THROW. */
422 extern int getdate_r (__const char *__restrict __string,
423 struct tm *__restrict __resbufp);
425 #endif /* __UCLIBC_MJN3_ONLY__ */
429 #endif /* <time.h> included. */
431 #endif /* <time.h> not already included. */