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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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