| /* Copyright (C) 1991-2021 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <https://www.gnu.org/licenses/>. */ |
| |
| /* |
| * ISO C99 Standard: 7.23 Date and time <time.h> |
| */ |
| |
| #ifndef _TIME_H |
| #define _TIME_H 1 |
| |
| #include <features.h> |
| |
| #define __need_size_t |
| #define __need_NULL |
| #include <stddef.h> |
| |
| /* This defines CLOCKS_PER_SEC, which is the number of processor clock |
| ticks per second, and possibly a number of other constants. */ |
| #include <bits/time.h> |
| |
| /* Many of the typedefs and structs whose official home is this header |
| may also need to be defined by other headers. */ |
| #include <bits/types/clock_t.h> |
| #include <bits/types/time_t.h> |
| #include <bits/types/struct_tm.h> |
| |
| #if defined __USE_POSIX199309 || defined __USE_ISOC11 |
| # include <bits/types/struct_timespec.h> |
| #endif |
| |
| #ifdef __USE_POSIX199309 |
| # include <bits/types/clockid_t.h> |
| # include <bits/types/timer_t.h> |
| # include <bits/types/struct_itimerspec.h> |
| struct sigevent; |
| #endif |
| |
| #ifdef __USE_XOPEN2K |
| # ifndef __pid_t_defined |
| typedef __pid_t pid_t; |
| # define __pid_t_defined |
| # endif |
| #endif |
| |
| #ifdef __USE_XOPEN2K8 |
| # include <bits/types/locale_t.h> |
| #endif |
| |
| #ifdef __USE_ISOC11 |
| /* Time base values for timespec_get. */ |
| # define TIME_UTC 1 |
| #endif |
| |
| __BEGIN_DECLS |
| |
| /* Time used by the program so far (user time + system time). |
| The result / CLOCKS_PER_SEC is program time in seconds. */ |
| extern clock_t clock (void) __THROW; |
| |
| /* Return the current time and put it in *TIMER if TIMER is not NULL. */ |
| extern time_t time (time_t *__timer) __THROW; |
| |
| /* Return the difference between TIME1 and TIME0. */ |
| extern double difftime (time_t __time1, time_t __time0) |
| __THROW __attribute__ ((__const__)); |
| |
| /* Return the `time_t' representation of TP and normalize TP. */ |
| extern time_t mktime (struct tm *__tp) __THROW; |
| |
| |
| /* Format TP into S according to FORMAT. |
| Write no more than MAXSIZE characters and return the number |
| of characters written, or 0 if it would exceed MAXSIZE. */ |
| extern size_t strftime (char *__restrict __s, size_t __maxsize, |
| const char *__restrict __format, |
| const struct tm *__restrict __tp) __THROW; |
| |
| #ifdef __USE_XOPEN |
| /* Parse S according to FORMAT and store binary time information in TP. |
| The return value is a pointer to the first unparsed character in S. */ |
| extern char *strptime (const char *__restrict __s, |
| const char *__restrict __fmt, struct tm *__tp) |
| __THROW; |
| #endif |
| |
| #ifdef __USE_XOPEN2K8 |
| /* Similar to the two functions above but take the information from |
| the provided locale and not the global locale. */ |
| |
| extern size_t strftime_l (char *__restrict __s, size_t __maxsize, |
| const char *__restrict __format, |
| const struct tm *__restrict __tp, |
| locale_t __loc) __THROW; |
| #endif |
| |
| #ifdef __USE_GNU |
| extern char *strptime_l (const char *__restrict __s, |
| const char *__restrict __fmt, struct tm *__tp, |
| locale_t __loc) __THROW; |
| #endif |
| |
| |
| /* Return the `struct tm' representation of *TIMER |
| in Universal Coordinated Time (aka Greenwich Mean Time). */ |
| extern struct tm *gmtime (const time_t *__timer) __THROW; |
| |
| /* Return the `struct tm' representation |
| of *TIMER in the local timezone. */ |
| extern struct tm *localtime (const time_t *__timer) __THROW; |
| |
| #if defined __USE_POSIX || __GLIBC_USE (ISOC2X) |
| /* Return the `struct tm' representation of *TIMER in UTC, |
| using *TP to store the result. */ |
| extern struct tm *gmtime_r (const time_t *__restrict __timer, |
| struct tm *__restrict __tp) __THROW; |
| |
| /* Return the `struct tm' representation of *TIMER in local time, |
| using *TP to store the result. */ |
| extern struct tm *localtime_r (const time_t *__restrict __timer, |
| struct tm *__restrict __tp) __THROW; |
| #endif /* POSIX || C2X */ |
| |
| /* Return a string of the form "Day Mon dd hh:mm:ss yyyy\n" |
| that is the representation of TP in this format. */ |
| extern char *asctime (const struct tm *__tp) __THROW; |
| |
| /* Equivalent to `asctime (localtime (timer))'. */ |
| extern char *ctime (const time_t *__timer) __THROW; |
| |
| #if defined __USE_POSIX || __GLIBC_USE (ISOC2X) |
| /* Reentrant versions of the above functions. */ |
| |
| /* Return in BUF a string of the form "Day Mon dd hh:mm:ss yyyy\n" |
| that is the representation of TP in this format. */ |
| extern char *asctime_r (const struct tm *__restrict __tp, |
| char *__restrict __buf) __THROW; |
| |
| /* Equivalent to `asctime_r (localtime_r (timer, *TMP*), buf)'. */ |
| extern char *ctime_r (const time_t *__restrict __timer, |
| char *__restrict __buf) __THROW; |
| #endif /* POSIX || C2X */ |
| |
| |
| /* Defined in localtime.c. */ |
| extern char *__tzname[2]; /* Current timezone names. */ |
| extern int __daylight; /* If daylight-saving time is ever in use. */ |
| extern long int __timezone; /* Seconds west of UTC. */ |
| |
| |
| #ifdef __USE_POSIX |
| /* Same as above. */ |
| extern char *tzname[2]; |
| |
| /* Set time conversion information from the TZ environment variable. |
| If TZ is not defined, a locale-dependent default is used. */ |
| extern void tzset (void) __THROW; |
| #endif |
| |
| #if defined __USE_MISC || defined __USE_XOPEN |
| extern int daylight; |
| extern long int timezone; |
| #endif |
| |
| |
| /* Nonzero if YEAR is a leap year (every 4 years, |
| except every 100th isn't, and every 400th is). */ |
| #define __isleap(year) \ |
| ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
| |
| |
| #ifdef __USE_MISC |
| /* Miscellaneous functions many Unices inherited from the public domain |
| localtime package. These are included only for compatibility. */ |
| |
| /* Like `mktime', but for TP represents Universal Time, not local time. */ |
| extern time_t timegm (struct tm *__tp) __THROW; |
| |
| /* Another name for `mktime'. */ |
| extern time_t timelocal (struct tm *__tp) __THROW; |
| |
| /* Return the number of days in YEAR. */ |
| extern int dysize (int __year) __THROW __attribute__ ((__const__)); |
| #endif |
| |
| |
| #ifdef __USE_POSIX199309 |
| /* Pause execution for a number of nanoseconds. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int nanosleep (const struct timespec *__requested_time, |
| struct timespec *__remaining); |
| |
| |
| /* Get resolution of clock CLOCK_ID. */ |
| extern int clock_getres (clockid_t __clock_id, struct timespec *__res) __THROW; |
| |
| /* Get current value of clock CLOCK_ID and store it in TP. */ |
| extern int clock_gettime (clockid_t __clock_id, struct timespec *__tp) __THROW; |
| |
| /* Set clock CLOCK_ID to value TP. */ |
| extern int clock_settime (clockid_t __clock_id, const struct timespec *__tp) |
| __THROW; |
| |
| # ifdef __USE_XOPEN2K |
| /* High-resolution sleep with the specified clock. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern int clock_nanosleep (clockid_t __clock_id, int __flags, |
| const struct timespec *__req, |
| struct timespec *__rem); |
| |
| /* Return clock ID for CPU-time clock. */ |
| extern int clock_getcpuclockid (pid_t __pid, clockid_t *__clock_id) __THROW; |
| # endif |
| |
| |
| /* Create new per-process timer using CLOCK_ID. */ |
| extern int timer_create (clockid_t __clock_id, |
| struct sigevent *__restrict __evp, |
| timer_t *__restrict __timerid) __THROW; |
| |
| /* Delete timer TIMERID. */ |
| extern int timer_delete (timer_t __timerid) __THROW; |
| |
| /* Set timer TIMERID to VALUE, returning old value in OVALUE. */ |
| extern int timer_settime (timer_t __timerid, int __flags, |
| const struct itimerspec *__restrict __value, |
| struct itimerspec *__restrict __ovalue) __THROW; |
| |
| /* Get current value of timer TIMERID and store it in VALUE. */ |
| extern int timer_gettime (timer_t __timerid, struct itimerspec *__value) |
| __THROW; |
| |
| /* Get expiration overrun for timer TIMERID. */ |
| extern int timer_getoverrun (timer_t __timerid) __THROW; |
| #endif |
| |
| |
| #ifdef __USE_ISOC11 |
| /* Set TS to calendar time based in time base BASE. */ |
| extern int timespec_get (struct timespec *__ts, int __base) |
| __THROW __nonnull ((1)); |
| #endif |
| |
| |
| #ifdef __USE_XOPEN_EXTENDED |
| /* Set to one of the following values to indicate an error. |
| 1 the DATEMSK environment variable is null or undefined, |
| 2 the template file cannot be opened for reading, |
| 3 failed to get file status information, |
| 4 the template file is not a regular file, |
| 5 an error is encountered while reading the template file, |
| 6 memory allication failed (not enough memory available), |
| 7 there is no line in the template that matches the input, |
| 8 invalid input specification Example: February 31 or a time is |
| specified that can not be represented in a time_t (representing |
| the time in seconds since 00:00:00 UTC, January 1, 1970) */ |
| extern int getdate_err; |
| |
| /* Parse the given string as a date specification and return a value |
| representing the value. The templates from the file identified by |
| the environment variable DATEMSK are used. In case of an error |
| `getdate_err' is set. |
| |
| This function is a possible cancellation point and therefore not |
| marked with __THROW. */ |
| extern struct tm *getdate (const char *__string); |
| #endif |
| |
| #ifdef __USE_GNU |
| /* Since `getdate' is not reentrant because of the use of `getdate_err' |
| and the static buffer to return the result in, we provide a thread-safe |
| variant. The functionality is the same. The result is returned in |
| the buffer pointed to by RESBUFP and in case of an error the return |
| value is != 0 with the same values as given above for `getdate_err'. |
| |
| This function is not part of POSIX and therefore no official |
| cancellation point. But due to similarity with an POSIX interface |
| or due to the implementation it is a cancellation point and |
| therefore not marked with __THROW. */ |
| extern int getdate_r (const char *__restrict __string, |
| struct tm *__restrict __resbufp); |
| #endif |
| |
| __END_DECLS |
| |
| #endif /* time.h. */ |