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/* Copyright (C) 1991-2012 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 <http://www.gnu.org/licenses/>. */ /* * ISO C99 Standard: 7.23 Date and time <time.h> */ #ifndef _TIME_H #if (! defined __need_time_t && !defined __need_clock_t && \ ! defined __need_timespec) # define _TIME_H 1 # include <features.h> __BEGIN_DECLS #endif #ifdef _TIME_H /* Get size_t and NULL from <stddef.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. */ # include <bits/time.h> /* This is the obsolete POSIX.1-1988 name for the same constant. */ # if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K # ifndef CLK_TCK # define CLK_TCK CLOCKS_PER_SEC # endif # endif #endif /* <time.h> included. */ #if !defined __clock_t_defined && (defined _TIME_H || defined __need_clock_t) # define __clock_t_defined 1 # include <bits/types.h> __BEGIN_NAMESPACE_STD /* Returned by `clock'. */ typedef __clock_t clock_t; __END_NAMESPACE_STD #if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC __USING_NAMESPACE_STD(clock_t) #endif #endif /* clock_t not defined and <time.h> or need clock_t. */ #undef __need_clock_t #if !defined __time_t_defined && (defined _TIME_H || defined __need_time_t) # define __time_t_defined 1 # include <bits/types.h> __BEGIN_NAMESPACE_STD /* Returned by `time'. */ typedef __time_t time_t; __END_NAMESPACE_STD #if defined __USE_POSIX || defined __USE_MISC || defined __USE_SVID __USING_NAMESPACE_STD(time_t) #endif #endif /* time_t not defined and <time.h> or need time_t. */ #undef __need_time_t #if !defined __clockid_t_defined && \ ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_clockid_t) # define __clockid_t_defined 1 # include <bits/types.h> /* Clock ID used in clock and timer functions. */ typedef __clockid_t clockid_t; #endif /* clockid_t not defined and <time.h> or need clockid_t. */ #undef __clockid_time_t #if !defined __timer_t_defined && \ ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_timer_t) # define __timer_t_defined 1 # include <bits/types.h> /* Timer ID returned by `timer_create'. */ typedef __timer_t timer_t; #endif /* timer_t not defined and <time.h> or need timer_t. */ #undef __need_timer_t #if (!defined __timespec_defined \ && ((defined _TIME_H \ && (defined __USE_POSIX199309 || defined __USE_MISC \ || defined __USE_ISOC11)) \ || defined __need_timespec)) # define __timespec_defined 1 # include <bits/types.h> /* This defines __time_t for us. */ /* POSIX.1b structure for a time value. This is like a `struct timeval' but has nanoseconds instead of microseconds. */ struct timespec { __time_t tv_sec; /* Seconds. */ __syscall_slong_t tv_nsec; /* Nanoseconds. */ }; #endif /* timespec not defined and <time.h> or need timespec. */ #undef __need_timespec #ifdef _TIME_H __BEGIN_NAMESPACE_STD /* Used by other time functions. */ struct tm { int tm_sec; /* Seconds. [0-60] (1 leap second) */ int tm_min; /* Minutes. [0-59] */ int tm_hour; /* Hours. [0-23] */ int tm_mday; /* Day. [1-31] */ int tm_mon; /* Month. [0-11] */ int tm_year; /* Year - 1900. */ int tm_wday; /* Day of week. [0-6] */ int tm_yday; /* Days in year.[0-365] */ int tm_isdst; /* DST. [-1/0/1]*/ # ifdef __USE_BSD long int tm_gmtoff; /* Seconds east of UTC. */ const char *tm_zone; /* Timezone abbreviation. */ # else long int __tm_gmtoff; /* Seconds east of UTC. */ const char *__tm_zone; /* Timezone abbreviation. */ # endif }; __END_NAMESPACE_STD #if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC __USING_NAMESPACE_STD(tm) #endif # ifdef __USE_POSIX199309 /* POSIX.1b structure for timer start values and intervals. */ struct itimerspec { struct timespec it_interval; struct timespec it_value; }; /* We can use a simple forward declaration. */ struct sigevent; # endif /* POSIX.1b */ # ifdef __USE_XOPEN2K # ifndef __pid_t_defined typedef __pid_t pid_t; # define __pid_t_defined # endif # endif # ifdef __USE_ISOC11 /* Time base values for timespec_get. */ # define TIME_UTC 1 # endif __BEGIN_NAMESPACE_STD /* Time used by the program so far (user time + system time). The result / CLOCKS_PER_SECOND 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; __END_NAMESPACE_STD # 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. */ # include <xlocale.h> 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 __BEGIN_NAMESPACE_STD /* 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; __END_NAMESPACE_STD # if defined __USE_POSIX || defined __USE_MISC /* 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 or misc */ __BEGIN_NAMESPACE_STD /* 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; __END_NAMESPACE_STD # if defined __USE_POSIX || defined __USE_MISC /* 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 or misc */ /* 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_SVID || defined __USE_XOPEN extern int daylight; extern long int timezone; # endif # ifdef __USE_SVID /* Set the system time to *WHEN. This call is restricted to the superuser. */ extern int stime (const time_t *__when) __THROW; # 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> included. */ #endif /* <time.h> not already included. */

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