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gnu/glibc/glibc-1.03/time/time.h
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183
gnu/glibc/glibc-1.03/time/time.h
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/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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* ANSI Standard: 4.12 DATE and TIME <time.h>
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*/
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#ifndef _TIME_H
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#if !defined(__need_time_t) && !defined(__need_clock_t)
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#define _TIME_H 1
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#include <features.h>
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#endif
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#ifdef _TIME_H
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/* Get size_t and NULL from <stddef.h>. */
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#define __need_size_t
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#define __need_NULL
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#include <stddef.h>
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#endif /* <time.h> included. */
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#ifdef _TIME_H
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/* Processor clock ticks per second. */
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#define CLOCKS_PER_SEC 1 /* ??? */
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#ifdef __USE_POSIX
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#define CLK_TCK 60 /* ??? */
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#endif
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#endif /* <time.h> included. */
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#if !defined(__clock_t_defined) && \
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(defined(_TIME_H) || defined(__need_clock_t))
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#define __clock_t_defined 1
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/* Returned by `clock'. */
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typedef long int clock_t;
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#endif /* clock_t not defined and <time.h> or need clock_t. */
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#undef __need_clock_t
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#if !defined(__time_t_defined) && \
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(defined(_TIME_H) || defined(__need_time_t))
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#define __time_t_defined 1
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#include <gnu/types.h>
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/* Returned by `time'. */
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typedef __time_t time_t;
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#endif /* time_t not defined and <time.h> or need time_t. */
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#undef __need_time_t
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#ifdef _TIME_H
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/* Used by other time functions. */
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struct tm
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{
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int tm_sec; /* Seconds. [0-61] (2 leap seconds) */
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int tm_min; /* Minutes. [0-59] */
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int tm_hour; /* Hours. [0-23] */
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int tm_mday; /* Day. [1-31] */
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int tm_mon; /* Month. [0-11] */
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int tm_year; /* Year - 1900. */
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int tm_wday; /* Day of week. [0-6] */
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int tm_yday; /* Days in year.[0-365] */
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int tm_isdst; /* DST. [-1/0/1]*/
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long int tm_gmtoff; /* Seconds west of UTC. */
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CONST char *tm_zone;/* Timezone abbreviation. */
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};
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#endif /* <time.h> included. */
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#ifdef _TIME_H
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/* Time used by the program so far (user time + system time).
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The result / CLOCKS_PER_SECOND is program time in seconds. */
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extern clock_t EXFUN(clock, (NOARGS));
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/* Return the current time and put it in *TIMER if TIMER is not NULL. */
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extern time_t EXFUN(time, (time_t *__timer));
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#ifndef __CONSTVALUE
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#ifdef __GNUC__
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/* The `const' keyword tells GCC that a function's return value is
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based solely on its arguments, and there are no side-effects. */
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#define __CONSTVALUE __const
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#else
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#define __CONSTVALUE
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#endif /* GCC. */
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#endif /* __CONSTVALUE not defined. */
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/* Return the difference between TIME1 and TIME0. */
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extern __CONSTVALUE double EXFUN(difftime, (time_t __time1, time_t __time0));
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/* Return the `time_t' representation of TP and normalize TP. */
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extern time_t EXFUN(mktime, (struct tm *__tp));
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/* Format TP into S according to FORMAT.
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Write no more than MAXSIZE characters and return the number
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of characters written, or 0 if it would exceed MAXSIZE. */
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extern size_t EXFUN(strftime, (char *__s, size_t __maxsize,
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CONST char *__format, CONST struct tm *__tp));
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/* Return the `struct tm' representation of *TIMER
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in Universal Coordinated Time (aka Greenwich Mean Time). */
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extern struct tm *EXFUN(gmtime, (CONST time_t *__timer));
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/* Return the `struct tm' representation
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of *TIMER in the local timezone. */
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extern struct tm *EXFUN(localtime, (CONST time_t *__timer));
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/* Return the `struct tm' representation of *TIMER,
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offset OFFSET seconds east of Universal Coordinated Time. */
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extern struct tm *EXFUN(__offtime, (CONST time_t *__timer, long int __offset));
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#ifdef __OPTIMIZE__
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#define gmtime(timer) __offtime((timer), 0L)
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#endif /* Optimizing. */
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/* Return a string of the form "Day Mon dd hh:mm:ss yyyy\n"
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that is the representation of TP in this format. */
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extern char *EXFUN(asctime, (CONST struct tm *__tp));
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/* Equivalent to `asctime(localtime(timer))'. */
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extern char *EXFUN(ctime, (CONST time_t *__timer));
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/* Defined in localtime.c. */
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extern char *__tzname[2]; /* Current timezone names. */
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extern int __daylight; /* If it is daylight savings time. */
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extern long int __timezone; /* Seconds west of UTC. */
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/* Set time conversion information from the TZ environment variable.
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If TZ is not defined, a locale-dependent default is used. */
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extern void EXFUN(__tzset, (NOARGS));
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#ifdef __USE_POSIX
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/* Same as above. */
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extern char *tzname[2];
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extern long int EXFUN(__tzname_max, (NOARGS));
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extern void EXFUN(tzset, (NOARGS));
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#ifdef __OPTIMIZE__
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#define tzset() __tzset()
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#endif /* Optimizing. */
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#endif
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#ifdef __USE_SVID
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extern int daylight;
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extern long int timezone;
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#endif
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/* Nonzero if YEAR is a leap year (every 4 years,
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except every 100th isn't, and every 400th is). */
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#define __isleap(year) \
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((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
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#endif /* <time.h> included. */
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#endif /* <time.h> not already included. */
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