[unix-history] / usr / src / 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 Olson.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)tzfile.h	5.7 (Berkeley) %G%
 */

/*
** 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.
*/

/*
** 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

#define NOSOLAR			/* 4BSD doesn't currently handle solar time */

#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)
Commit	Line	Data
6949fc73	1	/*
47ae2e1a KB	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 Olson.
	7	*
	8	* Redistribution and use in source and binary forms are permitted
	9	* provided that the above copyright notice and this paragraph are
	10	* duplicated in all such forms and that any documentation,
	11	* advertising materials, and other materials related to such
	12	* distribution and use acknowledge that the software was developed
	13	* by the University of California, Berkeley. The name of the
	14	* University may not be used to endorse or promote products derived
	15	* from this software without specific prior written permission.
	16	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	17	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	18	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	19	*
27b4d25a	20	* @(#)tzfile.h 5.7 (Berkeley) %G%
6949fc73 KB	21	*/
	22
	23	/*
	24	** Information about time zone files.
	25	*/
	26
45adb1b0	27	/* Time zone object file directory */
27b4d25a KB	28	#define TZDIR "/usr/share/zoneinfo"
27b4d25a KB	29	#define TZDEFAULT "/etc/localtime"
ceb03641	30	#define TZDEFRULES "posixrules"
6949fc73 KB	31
	32	/*
	33	** Each file begins with. . .
	34	*/
	35
	36	struct tzhead {
ceb03641 KB	37	char tzh_reserved[24]; /* reserved for future use */
	38	char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
	39	char tzh_leapcnt[4]; /* coded number of leap seconds */
6949fc73 KB	40	char tzh_timecnt[4]; /* coded number of transition times */
	41	char tzh_typecnt[4]; /* coded number of local time types */
	42	char tzh_charcnt[4]; /* coded number of abbr. chars */
	43	};
	44
	45	/*
	46	** . . .followed by. . .
	47	**
	48	** tzh_timecnt (char [4])s coded transition times a la time(2)
	49	** tzh_timecnt (unsigned char)s types of local time starting at above
	50	** tzh_typecnt repetitions of
	51	** one (char [4]) coded GMT offset in seconds
ceb03641	52	** one (unsigned char) used to set tm_isdst
6949fc73	53	** one (unsigned char) that's an abbreviation list index
ceb03641 KB	54	** tzh_charcnt (char)s '\0'-terminated zone abbreviations
	55	** tzh_leapcnt repetitions of
	56	** one (char [4]) coded leap second transition times
	57	** one (char [4]) total correction after above
	58	** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
	59	** time is standard time, if FALSE,
	60	** transition time is wall clock time
	61	** if absent, transition times are
	62	** assumed to be wall clock time
6949fc73 KB	63	*/
	64
	65	/*
	66	** In the current implementation, "tzset()" refuses to deal with files that
	67	** exceed any of the limits below.
	68	*/
	69
	70	/*
	71	** The TZ_MAX_TIMES value below is enough to handle a bit more than a
	72	** year's worth of solar time (corrected daily to the nearest second) or
	73	** 138 years of Pacific Presidential Election time
	74	** (where there are three time zone transitions every fourth year).
	75	*/
ceb03641 KB	76	#define TZ_MAX_TIMES 370
	77
	78	#define NOSOLAR /* 4BSD doesn't currently handle solar time */
	79
	80	#ifndef NOSOLAR
	81	#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
	82	#else
	83	#define TZ_MAX_TYPES 10 /* Maximum number of local time types */
	84	#endif
	85
	86	#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
	87
	88	#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
	89
	90	#define SECSPERMIN 60
	91	#define MINSPERHOUR 60
	92	#define HOURSPERDAY 24
	93	#define DAYSPERWEEK 7
	94	#define DAYSPERNYEAR 365
	95	#define DAYSPERLYEAR 366
	96	#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
	97	#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
	98	#define MONSPERYEAR 12
	99
	100	#define TM_SUNDAY 0
	101	#define TM_MONDAY 1
	102	#define TM_TUESDAY 2
	103	#define TM_WEDNESDAY 3
	104	#define TM_THURSDAY 4
	105	#define TM_FRIDAY 5
	106	#define TM_SATURDAY 6
	107
	108	#define TM_JANUARY 0
	109	#define TM_FEBRUARY 1
	110	#define TM_MARCH 2
	111	#define TM_APRIL 3
	112	#define TM_MAY 4
	113	#define TM_JUNE 5
	114	#define TM_JULY 6
	115	#define TM_AUGUST 7
	116	#define TM_SEPTEMBER 8
	117	#define TM_OCTOBER 9
	118	#define TM_NOVEMBER 10
	119	#define TM_DECEMBER 11
	120
	121	#define TM_YEAR_BASE 1900
	122
	123	#define EPOCH_YEAR 1970
	124	#define EPOCH_WDAY TM_THURSDAY
6949fc73 KB	125
	126	/*
	127	** Accurate only for the past couple of centuries;
	128	** that will probably do.
	129	*/
	130
ceb03641	131	#define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 \|\| ((y) % 400) == 0)