163 lines
5.4 KiB
C
163 lines
5.4 KiB
C
/* $NetBSD: tzfile.h,v 1.6 1998/07/30 14:11:22 kleink Exp $ */
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Arthur David Olson of the National Cancer Institute.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tzfile.h 8.1 (Berkeley) 6/2/93
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*/
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#ifndef _TZFILE_H_
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#define _TZFILE_H_
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/*
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* Information about time zone files.
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*/
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/* Time zone object file directory */
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#define TZDIR "/usr/share/zoneinfo"
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#define TZDEFAULT "/etc/localtime"
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#define TZDEFRULES "posixrules"
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/*
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** Each file begins with. . .
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*/
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#define TZ_MAGIC "TZif"
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struct tzhead {
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char tzh_magic[4]; /* TZ_MAGIC */
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char tzh_reserved[16]; /* reserved for future use */
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char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
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char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
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char tzh_leapcnt[4]; /* coded number of leap seconds */
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char tzh_timecnt[4]; /* coded number of transition times */
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char tzh_typecnt[4]; /* coded number of local time types */
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char tzh_charcnt[4]; /* coded number of abbr. chars */
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};
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/*
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** . . .followed by. . .
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**
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** tzh_timecnt (char [4])s coded transition times a la time(2)
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** tzh_timecnt (unsigned char)s types of local time starting at above
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** tzh_typecnt repetitions of
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** one (char [4]) coded UTC offset in seconds
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** one (unsigned char) used to set tm_isdst
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** one (unsigned char) that's an abbreviation list index
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** tzh_charcnt (char)s '\0'-terminated zone abbreviations
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** tzh_leapcnt repetitions of
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** one (char [4]) coded leap second transition times
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** one (char [4]) total correction after above
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** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
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** time is standard time, if FALSE,
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** transition time is wall clock time
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** if absent, transition times are
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** assumed to be wall clock time
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** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition
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** time is UTC, if FALSE,
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** transition time is wall clock time
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** if absent, transition times are
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** assumed to be local time
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*/
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/*
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** In the current implementation, "tzset()" refuses to deal with files that
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** exceed any of the limits below.
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*/
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/*
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** The TZ_MAX_TIMES value below is enough to handle a bit more than a
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** year's worth of solar time (corrected daily to the nearest second) or
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** 138 years of Pacific Presidential Election time
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** (where there are three time zone transitions every fourth year).
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*/
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#define TZ_MAX_TIMES 370
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#define NOSOLAR /* 4BSD doesn't currently handle solar time */
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#ifndef NOSOLAR
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#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
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#else
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#define TZ_MAX_TYPES 10 /* Maximum number of local time types */
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#endif
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#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
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#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
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#define SECSPERMIN 60
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#define MINSPERHOUR 60
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#define HOURSPERDAY 24
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#define DAYSPERWEEK 7
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#define DAYSPERNYEAR 365
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#define DAYSPERLYEAR 366
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#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
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#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
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#define MONSPERYEAR 12
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#define TM_SUNDAY 0
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#define TM_MONDAY 1
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#define TM_TUESDAY 2
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#define TM_WEDNESDAY 3
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#define TM_THURSDAY 4
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#define TM_FRIDAY 5
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#define TM_SATURDAY 6
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#define TM_JANUARY 0
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#define TM_FEBRUARY 1
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#define TM_MARCH 2
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#define TM_APRIL 3
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#define TM_MAY 4
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#define TM_JUNE 5
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#define TM_JULY 6
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#define TM_AUGUST 7
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#define TM_SEPTEMBER 8
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#define TM_OCTOBER 9
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#define TM_NOVEMBER 10
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#define TM_DECEMBER 11
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#define TM_YEAR_BASE 1900
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#define EPOCH_YEAR 1970
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#define EPOCH_WDAY TM_THURSDAY
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/*
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** Accurate only for the past couple of centuries;
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** that will probably do.
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*/
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#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
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#endif /* !_TZFILE_H_ */
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