[dump.git] / compat / include / tzfile.h

/*
 *	Ported to Linux's Second Extended File System as part of the
 *	dump and restore backup suit
 *	Remy Card <card@Linux.EU.Org>, 1994, 1995, 1996
 *
 */

/*
 * Copyright (c) 1988, 1993
 *	The 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	8.1 (Berkeley) 6/2/93
 */

#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.
*/

/*
** 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)

#endif /* !_TZFILE_H_ */
Commit	Line	Data
1227625a SP	1	/*
	2	* Ported to Linux's Second Extended File System as part of the
	3	* dump and restore backup suit
	4	* Remy Card <card@Linux.EU.Org>, 1994, 1995, 1996
	5	*
	6	*/
	7
	8	/*
	9	* Copyright (c) 1988, 1993
	10	* The Regents of the University of California. All rights reserved.
	11	*
	12	* This code is derived from software contributed to Berkeley by
	13	* Arthur David Olson of the National Cancer Institute.
	14	*
	15	* Redistribution and use in source and binary forms, with or without
	16	* modification, are permitted provided that the following conditions
	17	* are met:
	18	* 1. Redistributions of source code must retain the above copyright
	19	* notice, this list of conditions and the following disclaimer.
	20	* 2. Redistributions in binary form must reproduce the above copyright
	21	* notice, this list of conditions and the following disclaimer in the
	22	* documentation and/or other materials provided with the distribution.
	23	* 3. All advertising materials mentioning features or use of this software
	24	* must display the following acknowledgement:
	25	* This product includes software developed by the University of
	26	* California, Berkeley and its contributors.
	27	* 4. Neither the name of the University nor the names of its contributors
	28	* may be used to endorse or promote products derived from this software
	29	* without specific prior written permission.
	30	*
	31	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	32	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	33	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	34	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	35	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	39	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	40	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	41	* SUCH DAMAGE.
	42	*
	43	* @(#)tzfile.h 8.1 (Berkeley) 6/2/93
	44	*/
	45
	46	#ifndef _TZFILE_H_
	47	#define _TZFILE_H_
	48
	49	/*
	50	* Information about time zone files.
	51	*/
	52	/* Time zone object file directory */
	53	#define TZDIR "/usr/share/zoneinfo"
	54	#define TZDEFAULT "/etc/localtime"
	55	#define TZDEFRULES "posixrules"
	56
	57	/*
	58	** Each file begins with. . .
	59	*/
	60
	61	struct tzhead {
	62	char tzh_reserved[24]; /* reserved for future use */
	63	char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
	64	char tzh_leapcnt[4]; /* coded number of leap seconds */
65	char tzh_timecnt[4]; /* coded number of transition times */
66	char tzh_typecnt[4]; /* coded number of local time types */
67	char tzh_charcnt[4]; /* coded number of abbr. chars */
68	};
69
70	/*
71	** . . .followed by. . .
72	**
73	** tzh_timecnt (char [4])s coded transition times a la time(2)
74	** tzh_timecnt (unsigned char)s types of local time starting at above
75	** tzh_typecnt repetitions of
76	** one (char [4]) coded GMT offset in seconds
77	** one (unsigned char) used to set tm_isdst
78	** one (unsigned char) that's an abbreviation list index
79	** tzh_charcnt (char)s '\0'-terminated zone abbreviations
80	** tzh_leapcnt repetitions of
81	** one (char [4]) coded leap second transition times
82	** one (char [4]) total correction after above
83	** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
84	** time is standard time, if FALSE,
85	** transition time is wall clock time
86	** if absent, transition times are
87	** assumed to be wall clock time
88	*/
89
90	/*
91	** In the current implementation, "tzset()" refuses to deal with files that
92	** exceed any of the limits below.
93	*/
94
95	/*
96	** The TZ_MAX_TIMES value below is enough to handle a bit more than a
97	** year's worth of solar time (corrected daily to the nearest second) or
98	** 138 years of Pacific Presidential Election time
99	** (where there are three time zone transitions every fourth year).
100	*/
101	#define TZ_MAX_TIMES 370
102
103	#define NOSOLAR /* 4BSD doesn't currently handle solar time */
104
105	#ifndef NOSOLAR
106	#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
107	#else
108	#define TZ_MAX_TYPES 10 /* Maximum number of local time types */
109	#endif
110
111	#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
112
113	#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
114
115	#define SECSPERMIN 60
116	#define MINSPERHOUR 60
117	#define HOURSPERDAY 24
118	#define DAYSPERWEEK 7
119	#define DAYSPERNYEAR 365
120	#define DAYSPERLYEAR 366
121	#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
122	#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
123	#define MONSPERYEAR 12
124
125	#define TM_SUNDAY 0
126	#define TM_MONDAY 1
127	#define TM_TUESDAY 2
128	#define TM_WEDNESDAY 3
129	#define TM_THURSDAY 4
130	#define TM_FRIDAY 5
131	#define TM_SATURDAY 6
132
133	#define TM_JANUARY 0
134	#define TM_FEBRUARY 1
135	#define TM_MARCH 2
136	#define TM_APRIL 3
137	#define TM_MAY 4
138	#define TM_JUNE 5
139	#define TM_JULY 6
140	#define TM_AUGUST 7
141	#define TM_SEPTEMBER 8
142	#define TM_OCTOBER 9
143	#define TM_NOVEMBER 10
144	#define TM_DECEMBER 11
145
146	#define TM_YEAR_BASE 1900
147
148	#define EPOCH_YEAR 1970
149	#define EPOCH_WDAY TM_THURSDAY
150
151	/*
152	** Accurate only for the past couple of centuries;
153	** that will probably do.
154	*/
155
156	#define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 \|\| ((y) % 400) == 0)
157
158	#endif /* !_TZFILE_H_ */