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Commit	Line	Data
887d5eed A	1	#ifndef TZFILE_H
	2	#define TZFILE_H
	3
	4
	5	/*
	6	** This file is in the public domain, so clarified as of
	7	** 1996-06-05 by Arthur David Olson.
	8	**
	9	** $FreeBSD: head/contrib/tzcode/stdtime/tzfile.h 192625 2009-05-23 06:31:50Z edwin $
	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 8.1";
	28	*/
	29	#endif /* !defined NOID */
	30	#endif /* !defined lint */
	31
	32	/*
	33	** Information about time zone files.
	34	*/
	35
	36	#ifndef TZDIR
	37	#ifdef UNIFDEF_TZDIR_SYMLINK
	38	#define TZDIR "/var/db/timezone/zoneinfo" /* Time zone object file directory */
	39	#else /* !UNIFDEF_TZDIR_SYMLINK */
	40	#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */
	41	#endif /* UNIFDEF_TZDIR_SYMLINK */
	42	#endif /* !defined TZDIR */
	43
	44	#ifndef TZDEFAULT
	45	#ifdef UNIFDEF_MOVE_LOCALTIME
	46	#define TZDEFAULT "/var/db/timezone/localtime"
	47	#else /* !UNIFDEF_MOVE_LOCALTIME */
	48	#define TZDEFAULT "/etc/localtime"
	49	#endif /* UNIFDEF_MOVE_LOCALTIME */
	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_version[1]; /* '\0' or '2' as of 2005 */
65	char tzh_reserved[15]; /* reserved--must be zero */
66	char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
67	char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
68	char tzh_leapcnt[4]; /* coded number of leap seconds */
69	char tzh_timecnt[4]; /* coded number of transition times */
70	char tzh_typecnt[4]; /* coded number of local time types */
71	char tzh_charcnt[4]; /* coded number of abbr. chars */
72	};
73
74	/*
75	** . . .followed by. . .
76	**
77	** tzh_timecnt (char [4])s coded transition times a la time(2)
78	** tzh_timecnt (unsigned char)s types of local time starting at above
79	** tzh_typecnt repetitions of
80	** one (char [4]) coded UTC offset in seconds
81	** one (unsigned char) used to set tm_isdst
82	** one (unsigned char) that's an abbreviation list index
83	** tzh_charcnt (char)s '\0'-terminated zone abbreviations
84	** tzh_leapcnt repetitions of
85	** one (char [4]) coded leap second transition times
86	** one (char [4]) total correction after above
87	** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
88	** time is standard time, if FALSE,
89	** transition time is wall clock time
90	** if absent, transition times are
91	** assumed to be wall clock time
92	** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition
93	** time is UTC, if FALSE,
94	** transition time is local time
95	** if absent, transition times are
96	** assumed to be local time
97	*/
98
99	/*
100	** If tzh_version is '2' or greater, the above is followed by a second instance
101	** of tzhead and a second instance of the data in which each coded transition
102	** time uses 8 rather than 4 chars,
103	** then a POSIX-TZ-environment-variable-style string for use in handling
104	** instants after the last transition time stored in the file
105	** (with nothing between the newlines if there is no POSIX representation for
106	** such instants).
107	*/
108
109	/*
110	** In the current implementation, "tzset()" refuses to deal with files that
111	** exceed any of the limits below.
112	*/
113
114	#ifndef TZ_MAX_TIMES
115	#define TZ_MAX_TIMES 1200
116	#endif /* !defined TZ_MAX_TIMES */
117
118	#ifndef TZ_MAX_TYPES
119	#ifndef NOSOLAR
120	#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
121	#endif /* !defined NOSOLAR */
122	#ifdef NOSOLAR
123	/*
124	** Must be at least 14 for Europe/Riga as of Jan 12 1995,
125	** as noted by Earl Chew.
126	*/
127	#define TZ_MAX_TYPES 20 /* Maximum number of local time types */
128	#endif /* !defined NOSOLAR */
129	#endif /* !defined TZ_MAX_TYPES */
130
131	#ifndef TZ_MAX_CHARS
132	#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
133	/* (limited by what unsigned chars can hold) */
134	#endif /* !defined TZ_MAX_CHARS */
135
136	#ifndef TZ_MAX_LEAPS
137	#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
138	#endif /* !defined TZ_MAX_LEAPS */
139
140	#define SECSPERMIN 60
141	#define MINSPERHOUR 60
142	#define HOURSPERDAY 24
143	#define DAYSPERWEEK 7
144	#define DAYSPERNYEAR 365
145	#define DAYSPERLYEAR 366
146	#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
147	#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
148	#define MONSPERYEAR 12
149
150	#define TM_SUNDAY 0
151	#define TM_MONDAY 1
152	#define TM_TUESDAY 2
153	#define TM_WEDNESDAY 3
154	#define TM_THURSDAY 4
155	#define TM_FRIDAY 5
156	#define TM_SATURDAY 6
157
158	#define TM_JANUARY 0
159	#define TM_FEBRUARY 1
160	#define TM_MARCH 2
161	#define TM_APRIL 3
162	#define TM_MAY 4
163	#define TM_JUNE 5
164	#define TM_JULY 6
165	#define TM_AUGUST 7
166	#define TM_SEPTEMBER 8
167	#define TM_OCTOBER 9
168	#define TM_NOVEMBER 10
169	#define TM_DECEMBER 11
170
171	#define TM_YEAR_BASE 1900
172
173	#define EPOCH_YEAR 1970
174	#define EPOCH_WDAY TM_THURSDAY
175
176	#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 \|\| ((y) % 400) == 0))
177
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
192	#endif /* !defined TZFILE_H */