Annotation of src/include/tzfile.h, Revision 1.2
1.2 ! niklas 1: /* $OpenBSD: tzfile.h,v 1.3 1994/10/26 00:56:37 cgd Exp $ */
1.1 deraadt 2: /* $NetBSD: tzfile.h,v 1.3 1994/10/26 00:56:37 cgd Exp $ */
3:
4: /*
5: * Copyright (c) 1988 Regents of the University of California.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Arthur David Olson of the National Cancer Institute.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the University of
22: * California, Berkeley and its contributors.
23: * 4. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: *
39: * @(#)tzfile.h 5.10 (Berkeley) 4/3/91
40: */
41:
42: #ifndef _TZFILE_H_
43: #define _TZFILE_H_
44:
45: /*
46: * Information about time zone files.
47: */
48: /* Time zone object file directory */
49: #define TZDIR "/usr/share/zoneinfo"
50: #define TZDEFAULT "/etc/localtime"
51: #define TZDEFRULES "posixrules"
52:
53: /*
54: ** Each file begins with. . .
55: */
56:
57: struct tzhead {
58: char tzh_reserved[24]; /* reserved for future use */
59: char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
60: char tzh_leapcnt[4]; /* coded number of leap seconds */
61: char tzh_timecnt[4]; /* coded number of transition times */
62: char tzh_typecnt[4]; /* coded number of local time types */
63: char tzh_charcnt[4]; /* coded number of abbr. chars */
64: };
65:
66: /*
67: ** . . .followed by. . .
68: **
69: ** tzh_timecnt (char [4])s coded transition times a la time(2)
70: ** tzh_timecnt (unsigned char)s types of local time starting at above
71: ** tzh_typecnt repetitions of
72: ** one (char [4]) coded GMT offset in seconds
73: ** one (unsigned char) used to set tm_isdst
74: ** one (unsigned char) that's an abbreviation list index
75: ** tzh_charcnt (char)s '\0'-terminated zone abbreviations
76: ** tzh_leapcnt repetitions of
77: ** one (char [4]) coded leap second transition times
78: ** one (char [4]) total correction after above
79: ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
80: ** time is standard time, if FALSE,
81: ** transition time is wall clock time
82: ** if absent, transition times are
83: ** assumed to be wall clock time
84: */
85:
86: /*
87: ** In the current implementation, "tzset()" refuses to deal with files that
88: ** exceed any of the limits below.
89: */
90:
91: /*
92: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
93: ** year's worth of solar time (corrected daily to the nearest second) or
94: ** 138 years of Pacific Presidential Election time
95: ** (where there are three time zone transitions every fourth year).
96: */
97: #define TZ_MAX_TIMES 370
98:
99: #define NOSOLAR /* 4BSD doesn't currently handle solar time */
100:
101: #ifndef NOSOLAR
102: #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
103: #else
104: #define TZ_MAX_TYPES 10 /* Maximum number of local time types */
105: #endif
106:
107: #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
108:
109: #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
110:
111: #define SECSPERMIN 60
112: #define MINSPERHOUR 60
113: #define HOURSPERDAY 24
114: #define DAYSPERWEEK 7
115: #define DAYSPERNYEAR 365
116: #define DAYSPERLYEAR 366
117: #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
118: #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
119: #define MONSPERYEAR 12
120:
121: #define TM_SUNDAY 0
122: #define TM_MONDAY 1
123: #define TM_TUESDAY 2
124: #define TM_WEDNESDAY 3
125: #define TM_THURSDAY 4
126: #define TM_FRIDAY 5
127: #define TM_SATURDAY 6
128:
129: #define TM_JANUARY 0
130: #define TM_FEBRUARY 1
131: #define TM_MARCH 2
132: #define TM_APRIL 3
133: #define TM_MAY 4
134: #define TM_JUNE 5
135: #define TM_JULY 6
136: #define TM_AUGUST 7
137: #define TM_SEPTEMBER 8
138: #define TM_OCTOBER 9
139: #define TM_NOVEMBER 10
140: #define TM_DECEMBER 11
141:
142: #define TM_YEAR_BASE 1900
143:
144: #define EPOCH_YEAR 1970
145: #define EPOCH_WDAY TM_THURSDAY
146:
147: /*
148: ** Accurate only for the past couple of centuries;
149: ** that will probably do.
150: */
151:
152: #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)
153:
154: #endif /* !_TZFILE_H_ */
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