[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	5.3 (Berkeley) %G%
 */

/*
** Information about time zone files.
*/

#define	TZDIR		"/etc/zoneinfo"	/* Time zone object file directory */
#define	TZDEFAULT	"localtime"

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

struct tzhead {
	char	tzh_reserved[32];	/* reserved for future use */
	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_isdt
**		one (unsigned char)	that's an abbreviation list index
**	tzh_charcnt (char)s		'\0'-terminated zone abbreviaton strings
*/

/*
** 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			/* We currently don't handle solar time */

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

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

#define	SECS_PER_MIN	60
#define	MINS_PER_HOUR	60
#define	HOURS_PER_DAY	24
#define	DAYS_PER_WEEK	7
#define	DAYS_PER_NYEAR	365
#define	DAYS_PER_LYEAR	366
#define	SECS_PER_HOUR	(SECS_PER_MIN * MINS_PER_HOUR)
#define	SECS_PER_DAY	((long) SECS_PER_HOUR * HOURS_PER_DAY)
#define	MONS_PER_YEAR	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_SUNDAY	0

#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	*
	20	* @(#)tzfile.h 5.3 (Berkeley) %G%
6949fc73 KB	21	*/
	22
	23	/*
	24	** Information about time zone files.
	25	*/
	26
	27	#define TZDIR "/etc/zoneinfo" /* Time zone object file directory */
	28	#define TZDEFAULT "localtime"
	29
	30	/*
	31	** Each file begins with. . .
	32	*/
	33
	34	struct tzhead {
	35	char tzh_reserved[32]; /* reserved for future use */
	36	char tzh_timecnt[4]; /* coded number of transition times */
	37	char tzh_typecnt[4]; /* coded number of local time types */
	38	char tzh_charcnt[4]; /* coded number of abbr. chars */
	39	};
	40
	41	/*
	42	** . . .followed by. . .
	43	**
	44	** tzh_timecnt (char [4])s coded transition times a la time(2)
	45	** tzh_timecnt (unsigned char)s types of local time starting at above
	46	** tzh_typecnt repetitions of
	47	** one (char [4]) coded GMT offset in seconds
	48	** one (unsigned char) used to set tm_isdt
	49	** one (unsigned char) that's an abbreviation list index
	50	** tzh_charcnt (char)s '\0'-terminated zone abbreviaton strings
	51	*/
	52
	53	/*
	54	** In the current implementation, "tzset()" refuses to deal with files that
	55	** exceed any of the limits below.
	56	*/
	57
	58	/*
	59	** The TZ_MAX_TIMES value below is enough to handle a bit more than a
	60	** year's worth of solar time (corrected daily to the nearest second) or
	61	** 138 years of Pacific Presidential Election time
	62	** (where there are three time zone transitions every fourth year).
	63	*/
	64	#define TZ_MAX_TIMES 370
	65
	66	#define NOSOLAR /* We currently don't handle solar time */
	67
	68	#ifndef NOSOLAR
	69	#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
	70	#else /* !NOSOLAR */
	71	#define TZ_MAX_TYPES 10 /* Maximum number of local time types */
	72	#endif /* !NOSOLAR */
	73
	74	#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
	75
	76	#define SECS_PER_MIN 60
	77	#define MINS_PER_HOUR 60
	78	#define HOURS_PER_DAY 24
	79	#define DAYS_PER_WEEK 7
	80	#define DAYS_PER_NYEAR 365
	81	#define DAYS_PER_LYEAR 366
	82	#define SECS_PER_HOUR (SECS_PER_MIN * MINS_PER_HOUR)
	83	#define SECS_PER_DAY ((long) SECS_PER_HOUR * HOURS_PER_DAY)
	84	#define MONS_PER_YEAR 12
85
86	#define TM_SUNDAY 0
87	#define TM_MONDAY 1
88	#define TM_TUESDAY 2
89	#define TM_WEDNESDAY 3
90	#define TM_THURSDAY 4
91	#define TM_FRIDAY 5
92	#define TM_SATURDAY 6
93
94	#define TM_JANUARY 0
95	#define TM_FEBRUARY 1
96	#define TM_MARCH 2
97	#define TM_APRIL 3
98	#define TM_MAY 4
99	#define TM_JUNE 5
100	#define TM_JULY 6
101	#define TM_AUGUST 7
102	#define TM_SEPTEMBER 8
103	#define TM_OCTOBER 9
104	#define TM_NOVEMBER 10
105	#define TM_DECEMBER 11
106	#define TM_SUNDAY 0
107
108	#define TM_YEAR_BASE 1900
109
110	#define EPOCH_YEAR 1970
111	#define EPOCH_WDAY TM_THURSDAY
112
113	/*
114	** Accurate only for the past couple of centuries;
115	** that will probably do.
116	*/
117
118	#define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 \|\| ((y) % 400) == 0)