164 lines
4.6 KiB
C
164 lines
4.6 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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/*
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* from Arthur Olson's 6.1
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*/
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#ifndef _LIBSPL_SYS_TZFILE_H
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#define _LIBSPL_SYS_TZFILE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Information about time zone files.
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*/
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#define TZDIR "/usr/share/lib/zoneinfo" /* Time zone object file directory */
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#define TZDEFAULT (getenv("TZ"))
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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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struct tzhead {
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char tzh_reserved[24]; /* reserved for future use */
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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 GMT 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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*/
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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 TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
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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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/*
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* Use of the underscored variants may cause problems if you move your code to
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* certain System-V-based systems; for maximum portability, use the
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* underscore-free variants. The underscored variants are provided for
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* backward compatibility only; they may disappear from future versions of
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* this file.
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*/
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#define SECS_PER_MIN SECSPERMIN
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#define MINS_PER_HOUR MINSPERHOUR
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#define HOURS_PER_DAY HOURSPERDAY
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#define DAYS_PER_WEEK DAYSPERWEEK
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#define DAYS_PER_NYEAR DAYSPERNYEAR
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#define DAYS_PER_LYEAR DAYSPERLYEAR
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#define SECS_PER_HOUR SECSPERHOUR
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#define SECS_PER_DAY SECSPERDAY
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#define MONS_PER_YEAR MONSPERYEAR
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#ifdef __cplusplus
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}
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#endif
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#endif /* _LIBSPL_SYS_TZFILE_H */
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