[apple/libc.git] / stdtime / FreeBSD / tzfile.h

#ifndef TZFILE_H
#define TZFILE_H


/*
** This file is in the public domain, so clarified as of
** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
**
** $FreeBSD: src/lib/libc/stdtime/tzfile.h,v 1.8 2002/03/22 23:42:05 obrien Exp $
*/

/*
** This header is for use ONLY with the time conversion code.
** There is no guarantee that it will remain unchanged,
** or that it will remain at all.
** Do NOT copy it to any system include directory.
** Thank you!
*/

/*
** ID
*/

#ifndef lint
#ifndef NOID
/*
static char	tzfilehid[] = "@(#)tzfile.h	7.14";
*/
#endif /* !defined NOID */
#endif /* !defined lint */

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

#ifndef TZDIR
#ifdef UNIFDEF_TZDIR_SYMLINK
#define TZDIR	"/var/db/timezone/zoneinfo" /* Time zone object file directory */
#else /* !UNIFDEF_TZDIR_SYMLINK */
#define TZDIR	"/usr/share/zoneinfo" /* Time zone object file directory */
#endif /* UNIFDEF_TZDIR_SYMLINK */
#endif /* !defined TZDIR */

#ifndef TZDEFAULT
#ifdef UNIFDEF_MOVE_LOCALTIME
#define TZDEFAULT	"/var/db/timezone/localtime"
#else /* !UNIFDEF_MOVE_LOCALTIME */
#define TZDEFAULT	"/etc/localtime"
#endif /* UNIFDEF_MOVE_LOCALTIME */
#endif /* !defined TZDEFAULT */

#ifndef TZDEFRULES
#define TZDEFRULES	"posixrules"
#endif /* !defined TZDEFRULES */

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

#define	TZ_MAGIC	"TZif"

struct tzhead {
 	char	tzh_magic[4];		/* TZ_MAGIC */
	char	tzh_reserved[16];	/* reserved for future use */
	char	tzh_ttisgmtcnt[4];	/* coded number of trans. time flags */
	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 UTC 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
**	tzh_ttisgmtcnt (char)s		indexed by type; if TRUE, transition
**					time is UTC, if FALSE,
**					transition time is local time
**					if absent, transition times are
**					assumed to be local 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 /* !defined TZ_MAX_TIMES */

#ifndef TZ_MAX_TYPES
#ifndef NOSOLAR
#define TZ_MAX_TYPES	256 /* Limited by what (unsigned char)'s can hold */
#endif /* !defined NOSOLAR */
#ifdef NOSOLAR
/*
** Must be at least 14 for Europe/Riga as of Jan 12 1995,
** as noted by Earl Chew <earl@hpato.aus.hp.com>.
*/
#define TZ_MAX_TYPES	20	/* Maximum number of local time types */
#endif /* !defined NOSOLAR */
#endif /* !defined TZ_MAX_TYPES */

#ifndef TZ_MAX_CHARS
#define TZ_MAX_CHARS	50	/* Maximum number of abbreviation characters */
				/* (limited by what unsigned chars can hold) */
#endif /* !defined TZ_MAX_CHARS */

#ifndef TZ_MAX_LEAPS
#define TZ_MAX_LEAPS	50	/* Maximum number of leap second corrections */
#endif /* !defined TZ_MAX_LEAPS */

#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))

/*
** Since everything in isleap is modulo 400 (or a factor of 400), we know that
**	isleap(y) == isleap(y % 400)
** and so
**	isleap(a + b) == isleap((a + b) % 400)
** or
**	isleap(a + b) == isleap(a % 400 + b % 400)
** This is true even if % means modulo rather than Fortran remainder
** (which is allowed by C89 but not C99).
** We use this to avoid addition overflow problems.
*/

#define isleap_sum(a, b)	isleap((a) % 400 + (b) % 400)

#ifndef USG

/*
** Use of the underscored variants may cause problems if you move your code to
** certain System-V-based systems; for maximum portability, use the
** underscore-free variants.  The underscored variants are provided for
** backward compatibility only; they may disappear from future versions of
** this file.
*/

#define SECS_PER_MIN	SECSPERMIN
#define MINS_PER_HOUR	MINSPERHOUR
#define HOURS_PER_DAY	HOURSPERDAY
#define DAYS_PER_WEEK	DAYSPERWEEK
#define DAYS_PER_NYEAR	DAYSPERNYEAR
#define DAYS_PER_LYEAR	DAYSPERLYEAR
#define SECS_PER_HOUR	SECSPERHOUR
#define SECS_PER_DAY	SECSPERDAY
#define MONS_PER_YEAR	MONSPERYEAR

#endif /* !defined USG */

#endif /* !defined TZFILE_H */
Commit	Line	Data
5b2abdfb	1	#ifndef TZFILE_H
5b2abdfb A	2	#define TZFILE_H
5b2abdfb A	3
9385eb3d	4
5b2abdfb A	5	/*
	6	** This file is in the public domain, so clarified as of
	7	** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
9385eb3d A	8	**
9385eb3d A	9	** $FreeBSD: src/lib/libc/stdtime/tzfile.h,v 1.8 2002/03/22 23:42:05 obrien Exp $
5b2abdfb A	10	*/
	11
	12	/*
	13	** This header is for use ONLY with the time conversion code.
	14	** There is no guarantee that it will remain unchanged,
	15	** or that it will remain at all.
	16	** Do NOT copy it to any system include directory.
	17	** Thank you!
	18	*/
	19
	20	/*
	21	** ID
	22	*/
	23
	24	#ifndef lint
	25	#ifndef NOID
	26	/*
	27	static char tzfilehid[] = "@(#)tzfile.h 7.14";
	28	*/
	29	#endif /* !defined NOID */
	30	#endif /* !defined lint */
	31
	32	/*
	33	** Information about time zone files.
	34	*/
	35
	36	#ifndef TZDIR
6465356a A	37	#ifdef UNIFDEF_TZDIR_SYMLINK
	38	#define TZDIR "/var/db/timezone/zoneinfo" /* Time zone object file directory */
	39	#else /* !UNIFDEF_TZDIR_SYMLINK */
5b2abdfb	40	#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */
6465356a	41	#endif /* UNIFDEF_TZDIR_SYMLINK */
5b2abdfb A	42	#endif /* !defined TZDIR */
	43
	44	#ifndef TZDEFAULT
ad3c9f2a A	45	#ifdef UNIFDEF_MOVE_LOCALTIME
	46	#define TZDEFAULT "/var/db/timezone/localtime"
	47	#else /* !UNIFDEF_MOVE_LOCALTIME */
5b2abdfb	48	#define TZDEFAULT "/etc/localtime"
ad3c9f2a	49	#endif /* UNIFDEF_MOVE_LOCALTIME */
5b2abdfb A	50	#endif /* !defined TZDEFAULT */
	51
	52	#ifndef TZDEFRULES
	53	#define TZDEFRULES "posixrules"
	54	#endif /* !defined TZDEFRULES */
	55
	56	/*
	57	** Each file begins with. . .
	58	*/
	59
	60	#define TZ_MAGIC "TZif"
	61
	62	struct tzhead {
	63	char tzh_magic[4]; /* TZ_MAGIC */
	64	char tzh_reserved[16]; /* reserved for future use */
	65	char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
	66	char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
	67	char tzh_leapcnt[4]; /* coded number of leap seconds */
	68	char tzh_timecnt[4]; /* coded number of transition times */
	69	char tzh_typecnt[4]; /* coded number of local time types */
	70	char tzh_charcnt[4]; /* coded number of abbr. chars */
	71	};
	72
	73	/*
	74	** . . .followed by. . .
	75	**
	76	** tzh_timecnt (char [4])s coded transition times a la time(2)
	77	** tzh_timecnt (unsigned char)s types of local time starting at above
	78	** tzh_typecnt repetitions of
	79	** one (char [4]) coded UTC offset in seconds
	80	** one (unsigned char) used to set tm_isdst
	81	** one (unsigned char) that's an abbreviation list index
	82	** tzh_charcnt (char)s '\0'-terminated zone abbreviations
	83	** tzh_leapcnt repetitions of
	84	** one (char [4]) coded leap second transition times
	85	** one (char [4]) total correction after above
	86	** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
	87	** time is standard time, if FALSE,
	88	** transition time is wall clock time
	89	** if absent, transition times are
	90	** assumed to be wall clock time
	91	** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition
	92	** time is UTC, if FALSE,
	93	** transition time is local time
	94	** if absent, transition times are
	95	** assumed to be local time
	96	*/
	97
	98	/*
	99	** In the current implementation, "tzset()" refuses to deal with files that
	100	** exceed any of the limits below.
	101	*/
	102
	103	#ifndef TZ_MAX_TIMES
	104	/*
	105	** The TZ_MAX_TIMES value below is enough to handle a bit more than a
	106	** year's worth of solar time (corrected daily to the nearest second) or
	107	** 138 years of Pacific Presidential Election time
	108	** (where there are three time zone transitions every fourth year).
	109	*/
	110	#define TZ_MAX_TIMES 370
	111	#endif /* !defined TZ_MAX_TIMES */
	112
	113	#ifndef TZ_MAX_TYPES
114	#ifndef NOSOLAR
115	#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
116	#endif /* !defined NOSOLAR */
117	#ifdef NOSOLAR
118	/*
119	** Must be at least 14 for Europe/Riga as of Jan 12 1995,
120	** as noted by Earl Chew <earl@hpato.aus.hp.com>.
121	*/
122	#define TZ_MAX_TYPES 20 /* Maximum number of local time types */
123	#endif /* !defined NOSOLAR */
124	#endif /* !defined TZ_MAX_TYPES */
125
126	#ifndef TZ_MAX_CHARS
127	#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
128	/* (limited by what unsigned chars can hold) */
129	#endif /* !defined TZ_MAX_CHARS */
130
131	#ifndef TZ_MAX_LEAPS
132	#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
133	#endif /* !defined TZ_MAX_LEAPS */
134
135	#define SECSPERMIN 60
136	#define MINSPERHOUR 60
137	#define HOURSPERDAY 24
138	#define DAYSPERWEEK 7
139	#define DAYSPERNYEAR 365
140	#define DAYSPERLYEAR 366
141	#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
142	#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
143	#define MONSPERYEAR 12
144
145	#define TM_SUNDAY 0
146	#define TM_MONDAY 1
147	#define TM_TUESDAY 2
148	#define TM_WEDNESDAY 3
149	#define TM_THURSDAY 4
150	#define TM_FRIDAY 5
151	#define TM_SATURDAY 6
152
153	#define TM_JANUARY 0
154	#define TM_FEBRUARY 1
155	#define TM_MARCH 2
156	#define TM_APRIL 3
157	#define TM_MAY 4
158	#define TM_JUNE 5
159	#define TM_JULY 6
160	#define TM_AUGUST 7
161	#define TM_SEPTEMBER 8
162	#define TM_OCTOBER 9
163	#define TM_NOVEMBER 10
164	#define TM_DECEMBER 11
165
166	#define TM_YEAR_BASE 1900
167
168	#define EPOCH_YEAR 1970
169	#define EPOCH_WDAY TM_THURSDAY
170
171	/*
172	** Accurate only for the past couple of centuries;
173	** that will probably do.
174	*/
175
176	#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 \|\| ((y) % 400) == 0))
177
ad3c9f2a A	178	/*
	179	** Since everything in isleap is modulo 400 (or a factor of 400), we know that
	180	** isleap(y) == isleap(y % 400)
	181	** and so
	182	** isleap(a + b) == isleap((a + b) % 400)
	183	** or
	184	** isleap(a + b) == isleap(a % 400 + b % 400)
	185	** This is true even if % means modulo rather than Fortran remainder
	186	** (which is allowed by C89 but not C99).
	187	** We use this to avoid addition overflow problems.
	188	*/
	189
	190	#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
	191
5b2abdfb A	192	#ifndef USG
	193
	194	/*
	195	** Use of the underscored variants may cause problems if you move your code to
	196	** certain System-V-based systems; for maximum portability, use the
	197	** underscore-free variants. The underscored variants are provided for
	198	** backward compatibility only; they may disappear from future versions of
	199	** this file.
	200	*/
	201
	202	#define SECS_PER_MIN SECSPERMIN
	203	#define MINS_PER_HOUR MINSPERHOUR
	204	#define HOURS_PER_DAY HOURSPERDAY
	205	#define DAYS_PER_WEEK DAYSPERWEEK
	206	#define DAYS_PER_NYEAR DAYSPERNYEAR
	207	#define DAYS_PER_LYEAR DAYSPERLYEAR
	208	#define SECS_PER_HOUR SECSPERHOUR
	209	#define SECS_PER_DAY SECSPERDAY
	210	#define MONS_PER_YEAR MONSPERYEAR
	211
	212	#endif /* !defined USG */
	213
	214	#endif /* !defined TZFILE_H */