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/* Copyright (C) 1991, 92, 93, 94, 95, 96 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/*
* ANSI Standard: 4.12 DATE and TIME <time.h>
*/
#ifndef _TIME_H
#if !defined(__need_time_t) && !defined(__need_clock_t)
#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>
#endif /* <time.h> included. */
#ifdef _TIME_H
/* This defines CLOCKS_PER_SEC, which is the number of processor clock
ticks per second. */
#include <timebits.h>
/* This is the obsolete POSIX.1-1988 name for the same constant. */
#ifdef __USE_POSIX
#define CLK_TCK CLOCKS_PER_SEC
#endif
#endif /* <time.h> included. */
#if !defined(__clock_t_defined) && \
(defined(_TIME_H) || defined(__need_clock_t))
#define __clock_t_defined 1
/* Returned by `clock'. */
typedef long int clock_t;
#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 <gnu/types.h>
/* Returned by `time'. */
typedef __time_t time_t;
#endif /* time_t not defined and <time.h> or need time_t. */
#undef __need_time_t
#ifdef _TIME_H
/* Used by other time functions. */
struct tm
{
int tm_sec; /* Seconds. [0-61] (2 leap seconds) */
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]*/
long int tm_gmtoff; /* Seconds west of UTC. */
__const char *tm_zone; /* Timezone abbreviation. */
};
#endif /* <time.h> included. */
#ifdef _TIME_H
/* 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 __P ((void));
/* Return the current time and put it in *TIMER if TIMER is not NULL. */
extern time_t time __P ((time_t *__timer));
/* Return the difference between TIME1 and TIME0. */
extern double difftime __P ((time_t __time1, time_t __time0))
__attribute__ ((__const__));
/* Return the `time_t' representation of TP and normalize TP. */
extern time_t mktime __P ((struct tm *__tp));
/* Subroutine of `mktime'. Return the `time_t' representation of TP and
normalize TP, given that a `struct tm *' maps to a `time_t' as performed
by FUNC. Keep track of next guess for time_t offset in *OFFSET. */
extern time_t __mktime_internal __P ((struct tm *__tp,
struct tm *(*__func) (const time_t *,
struct tm *),
time_t *__offset));
/* 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 __P ((char *__s, size_t __maxsize,
__const char *__format, __const struct tm *__tp));
/* Return the `struct tm' representation of *TIMER
in Universal Coordinated Time (aka Greenwich Mean Time). */
extern struct tm *gmtime __P ((__const time_t *__timer));
/* Return the `struct tm' representation
of *TIMER in the local timezone. */
extern struct tm *localtime __P ((__const time_t *__timer));
#ifdef __USE_REENTRANT
/* Return the `struct tm' representation of *TIMER in UTC,
using *TP to store the result. */
extern struct tm *__gmtime_r __P ((__const time_t *__timer,
struct tm *__tp));
extern struct tm *gmtime_r __P ((__const time_t *__timer,
struct tm *__tp));
/* Return the `struct tm' representation of *TIMER in local time,
using *TP to store the result. */
extern struct tm *__localtime_r __P ((__const time_t *__timer,
struct tm *__tp));
extern struct tm *localtime_r __P ((__const time_t *__timer,
struct tm *__tp));
#endif
/* Compute the `struct tm' representation of *T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP. */
extern void __offtime __P ((__const time_t *__timer,
long int __offset,
struct tm *__TP));
/* 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 __P ((__const struct tm *__tp));
/* Equivalent to `asctime(localtime(timer))'. */
extern char *ctime __P ((__const time_t *__timer));
/* Defined in localtime.c. */
extern char *__tzname[2]; /* Current timezone names. */
extern int __daylight; /* If it is daylight savings time. */
extern long int __timezone; /* Seconds west of UTC. */
/* Set time conversion information from the TZ environment variable.
If TZ is not defined, a locale-dependent default is used. */
extern void __tzset __P ((void));
#ifdef __USE_POSIX
/* Same as above. */
extern char *tzname[2];
/* Return the maximum length of a timezone name.
This is what `sysconf (_SC_TZNAME_MAX)' does. */
extern long int __tzname_max __P ((void));
extern void tzset __P ((void));
#ifdef __OPTIMIZE__
#define tzset() __tzset()
#endif /* Optimizing. */
#endif
#ifdef __USE_SVID
extern int daylight;
extern long int timezone;
/* Set the system time to *WHEN.
This call is restricted to the superuser. */
extern int stime __P ((__const time_t *__when));
#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 __P ((struct tm *__tp));
/* Another name for `mktime'. */
extern time_t timelocal __P ((struct tm *__tp));
/* Return the number of days in YEAR. */
extern int dysize __P ((int __year));
#endif
/* POSIX.4 structure for a time value. This is like a `struct timeval' but
has nanoseconds instead of microseconds. */
struct timespec
{
long int ts_sec; /* Seconds. */
long int ts_nsec; /* Nanoseconds. */
};
#ifdef __USE_POSIX
/* Pause execution for a number of nanoseconds. */
extern int nanosleep __P ((__const struct timespec *__requested_time,
struct timespec *__remaining));
#endif
__END_DECLS
#endif /* <time.h> included. */
#endif /* <time.h> not already included. */
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