[unix-history] / include / tzfile.h

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Arthur David Olson of the National Cancer Institute.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)tzfile.h	5.10 (Berkeley) 4/3/91
 */

#ifndef _TZFILE_H_
#define	_TZFILE_H_

/*
 * Information about time zone files.
 */
			/* Time zone object file directory */
#define TZDIR		"/usr/share/zoneinfo"
#define TZDEFAULT	"/etc/localtime"
#define TZDEFRULES	"posixrules"

/*
** Each file begins with. . .
*/

struct tzhead {
	char	tzh_reserved[24];	/* reserved for future use */
	char	tzh_ttisstdcnt[4];	/* coded number of trans. time flags */
	char	tzh_leapcnt[4];		/* coded number of leap seconds */
	char	tzh_timecnt[4];		/* coded number of transition times */
	char	tzh_typecnt[4];		/* coded number of local time types */
	char	tzh_charcnt[4];		/* coded number of abbr. chars */
};

/*
** . . .followed by. . .
**
**	tzh_timecnt (char [4])s		coded transition times a la time(2)
**	tzh_timecnt (unsigned char)s	types of local time starting at above
**	tzh_typecnt repetitions of
**		one (char [4])		coded GMT offset in seconds
**		one (unsigned char)	used to set tm_isdst
**		one (unsigned char)	that's an abbreviation list index
**	tzh_charcnt (char)s		'\0'-terminated zone abbreviations
**	tzh_leapcnt repetitions of
**		one (char [4])		coded leap second transition times
**		one (char [4])		total correction after above
**	tzh_ttisstdcnt (char)s		indexed by type; if TRUE, transition
**					time is standard time, if FALSE,
**					transition time is wall clock time
**					if absent, transition times are
**					assumed to be wall clock time
*/

/*
** In the current implementation, "tzset()" refuses to deal with files that
** exceed any of the limits below.
*/

#ifndef TZ_MAX_TIMES
/*
** The TZ_MAX_TIMES value below is enough to handle a bit more than a
** year's worth of solar time (corrected daily to the nearest second) or
** 138 years of Pacific Presidential Election time
** (where there are three time zone transitions every fourth year).
*/
#define TZ_MAX_TIMES	370
#endif /* TZ_MAX_TIMES */

#ifndef NOSOLAR
#define TZ_MAX_TYPES	256	/* Limited by what (unsigned char)'s can hold */
#else
#define TZ_MAX_TYPES	10	/* Maximum number of local time types */
#endif

#define TZ_MAX_CHARS	50	/* Maximum number of abbreviation characters */

#define	TZ_MAX_LEAPS	50	/* Maximum number of leap second corrections */

#define SECSPERMIN	60
#define MINSPERHOUR	60
#define HOURSPERDAY	24
#define DAYSPERWEEK	7
#define DAYSPERNYEAR	365
#define DAYSPERLYEAR	366
#define SECSPERHOUR	(SECSPERMIN * MINSPERHOUR)
#define SECSPERDAY	((long) SECSPERHOUR * HOURSPERDAY)
#define MONSPERYEAR	12

#define TM_SUNDAY	0
#define TM_MONDAY	1
#define TM_TUESDAY	2
#define TM_WEDNESDAY	3
#define TM_THURSDAY	4
#define TM_FRIDAY	5
#define TM_SATURDAY	6

#define TM_JANUARY	0
#define TM_FEBRUARY	1
#define TM_MARCH	2
#define TM_APRIL	3
#define TM_MAY		4
#define TM_JUNE		5
#define TM_JULY		6
#define TM_AUGUST	7
#define TM_SEPTEMBER	8
#define TM_OCTOBER	9
#define TM_NOVEMBER	10
#define TM_DECEMBER	11

#define TM_YEAR_BASE	1900

#define EPOCH_YEAR	1970
#define EPOCH_WDAY	TM_THURSDAY

/*
** Accurate only for the past couple of centuries;
** that will probably do.
*/

#define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)

#endif /* !_TZFILE_H_ */
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Copyright (c) 1988 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Arthur David Olson of the National Cancer Institute.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
	36	* @(#)tzfile.h 5.10 (Berkeley) 4/3/91
	37	*/
	38
	39	#ifndef _TZFILE_H_
	40	#define _TZFILE_H_
	41
	42	/*
	43	* Information about time zone files.
	44	*/
	45	/* Time zone object file directory */
	46	#define TZDIR "/usr/share/zoneinfo"
	47	#define TZDEFAULT "/etc/localtime"
	48	#define TZDEFRULES "posixrules"
	49
	50	/*
	51	** Each file begins with. . .
	52	*/
	53
	54	struct tzhead {
	55	char tzh_reserved[24]; /* reserved for future use */
	56	char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
	57	char tzh_leapcnt[4]; /* coded number of leap seconds */
	58	char tzh_timecnt[4]; /* coded number of transition times */
	59	char tzh_typecnt[4]; /* coded number of local time types */
	60	char tzh_charcnt[4]; /* coded number of abbr. chars */
	61	};
	62
	63	/*
	64	** . . .followed by. . .
65	**
66	** tzh_timecnt (char [4])s coded transition times a la time(2)
67	** tzh_timecnt (unsigned char)s types of local time starting at above
68	** tzh_typecnt repetitions of
69	** one (char [4]) coded GMT offset in seconds
70	** one (unsigned char) used to set tm_isdst
71	** one (unsigned char) that's an abbreviation list index
72	** tzh_charcnt (char)s '\0'-terminated zone abbreviations
73	** tzh_leapcnt repetitions of
74	** one (char [4]) coded leap second transition times
75	** one (char [4]) total correction after above
76	** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
77	** time is standard time, if FALSE,
78	** transition time is wall clock time
79	** if absent, transition times are
80	** assumed to be wall clock time
81	*/
82
83	/*
84	** In the current implementation, "tzset()" refuses to deal with files that
85	** exceed any of the limits below.
86	*/
87
6cb6512d	88	#ifndef TZ_MAX_TIMES
15637ed4 RG	89	/*
	90	** The TZ_MAX_TIMES value below is enough to handle a bit more than a
	91	** year's worth of solar time (corrected daily to the nearest second) or
	92	** 138 years of Pacific Presidential Election time
	93	** (where there are three time zone transitions every fourth year).
	94	*/
	95	#define TZ_MAX_TIMES 370
6cb6512d	96	#endif /* TZ_MAX_TIMES */
15637ed4 RG	97
	98	#ifndef NOSOLAR
	99	#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
	100	#else
	101	#define TZ_MAX_TYPES 10 /* Maximum number of local time types */
	102	#endif
	103
	104	#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
	105
	106	#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
	107
	108	#define SECSPERMIN 60
	109	#define MINSPERHOUR 60
	110	#define HOURSPERDAY 24
	111	#define DAYSPERWEEK 7
	112	#define DAYSPERNYEAR 365
	113	#define DAYSPERLYEAR 366
	114	#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
	115	#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
	116	#define MONSPERYEAR 12
	117
	118	#define TM_SUNDAY 0
	119	#define TM_MONDAY 1
	120	#define TM_TUESDAY 2
	121	#define TM_WEDNESDAY 3
	122	#define TM_THURSDAY 4
	123	#define TM_FRIDAY 5
	124	#define TM_SATURDAY 6
	125
	126	#define TM_JANUARY 0
	127	#define TM_FEBRUARY 1
	128	#define TM_MARCH 2
	129	#define TM_APRIL 3
	130	#define TM_MAY 4
	131	#define TM_JUNE 5
	132	#define TM_JULY 6
	133	#define TM_AUGUST 7
	134	#define TM_SEPTEMBER 8
	135	#define TM_OCTOBER 9
	136	#define TM_NOVEMBER 10
	137	#define TM_DECEMBER 11
	138
	139	#define TM_YEAR_BASE 1900
	140
	141	#define EPOCH_YEAR 1970
	142	#define EPOCH_WDAY TM_THURSDAY
	143
	144	/*
	145	** Accurate only for the past couple of centuries;
	146	** that will probably do.
	147	*/
	148
	149	#define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 \|\| ((y) % 400) == 0)
	150
	151	#endif /* !_TZFILE_H_ */