mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-22 19:00:07 +00:00
282 lines
9.1 KiB
C
282 lines
9.1 KiB
C
/* Copyright (C) 1991,92,93,94,95,96,97,98,99 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., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/*
|
|
* ISO C Standard: 4.12 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. */
|
|
# ifdef __USE_POSIX
|
|
# 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>
|
|
|
|
/* Returned by `clock'. */
|
|
typedef __clock_t 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 <bits/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
|
|
|
|
|
|
#if !defined __timespec_defined && \
|
|
((defined _TIME_H && defined __USE_POSIX199309) || defined __need_timespec)
|
|
# define __timespec_defined 1
|
|
|
|
/* POSIX.4 structure for a time value. This is like a `struct timeval' but
|
|
has nanoseconds instead of microseconds. */
|
|
struct timespec
|
|
{
|
|
long int tv_sec; /* Seconds. */
|
|
long int tv_nsec; /* Nanoseconds. */
|
|
};
|
|
|
|
#endif /* timespec not defined and <time.h> or need timespec. */
|
|
#undef __need_timespec
|
|
|
|
|
|
#ifdef _TIME_H
|
|
/* 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
|
|
};
|
|
|
|
|
|
/* 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));
|
|
|
|
|
|
/* 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 *__restrict __s, size_t __maxsize,
|
|
__const char *__restrict __format,
|
|
__const struct tm *__restrict __tp));
|
|
|
|
# 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 __P ((__const char *__s, __const char *__fmt,
|
|
struct tm *__tp));
|
|
# endif
|
|
|
|
|
|
/* 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));
|
|
|
|
# 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 __P ((__const time_t *__restrict __timer,
|
|
struct tm *__restrict __tp));
|
|
extern struct tm *gmtime_r __P ((__const time_t *__restrict __timer,
|
|
struct tm *__restrict __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 *__restrict __timer,
|
|
struct tm *__restrict __tp));
|
|
# endif /* POSIX or misc */
|
|
|
|
/* 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));
|
|
|
|
# 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 __P ((__const struct tm *__restrict __tp,
|
|
char *__restrict __buf));
|
|
|
|
/* Equivalent to `asctime_r (localtime_r (timer, *TMP*), buf)'. */
|
|
extern char *ctime_r __P ((__const time_t *__restrict __timer,
|
|
char *__restrict __buf));
|
|
# 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 __P ((void));
|
|
# 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 __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
|
|
|
|
|
|
# ifdef __USE_POSIX199309
|
|
/* Pause execution for a number of nanoseconds. */
|
|
extern int nanosleep __P ((__const struct timespec *__requested_time,
|
|
struct timespec *__remaining));
|
|
# 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. */
|
|
extern struct tm *getdate __P ((__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'. */
|
|
extern int getdate_r __P ((__const char *__restrict __string,
|
|
struct tm *__restrict __resbufp));
|
|
# endif
|
|
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* <time.h> included. */
|
|
|
|
#endif /* <time.h> not already included. */
|