Annotation of src/include/tzfile.h, Revision 1.4
1.4 ! millert 1: /* $OpenBSD: tzfile.h,v 1.3 1998/03/30 06:53:47 deraadt 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.
1.4 ! millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)tzfile.h 5.10 (Berkeley) 4/3/91
36: */
37:
38: #ifndef _TZFILE_H_
39: #define _TZFILE_H_
40:
41: /*
42: * Information about time zone files.
43: */
44: /* Time zone object file directory */
45: #define TZDIR "/usr/share/zoneinfo"
46: #define TZDEFAULT "/etc/localtime"
47: #define TZDEFRULES "posixrules"
48:
49: /*
50: ** Each file begins with. . .
51: */
52:
53: struct tzhead {
54: char tzh_reserved[24]; /* reserved for future use */
55: char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
56: char tzh_leapcnt[4]; /* coded number of leap seconds */
57: char tzh_timecnt[4]; /* coded number of transition times */
58: char tzh_typecnt[4]; /* coded number of local time types */
59: char tzh_charcnt[4]; /* coded number of abbr. chars */
60: };
61:
62: /*
63: ** . . .followed by. . .
64: **
65: ** tzh_timecnt (char [4])s coded transition times a la time(2)
66: ** tzh_timecnt (unsigned char)s types of local time starting at above
67: ** tzh_typecnt repetitions of
68: ** one (char [4]) coded GMT offset in seconds
69: ** one (unsigned char) used to set tm_isdst
70: ** one (unsigned char) that's an abbreviation list index
71: ** tzh_charcnt (char)s '\0'-terminated zone abbreviations
72: ** tzh_leapcnt repetitions of
73: ** one (char [4]) coded leap second transition times
74: ** one (char [4]) total correction after above
75: ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
76: ** time is standard time, if FALSE,
77: ** transition time is wall clock time
78: ** if absent, transition times are
79: ** assumed to be wall clock time
80: */
81:
82: /*
83: ** In the current implementation, "tzset()" refuses to deal with files that
84: ** exceed any of the limits below.
85: */
86:
87: /*
88: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
89: ** year's worth of solar time (corrected daily to the nearest second) or
90: ** 138 years of Pacific Presidential Election time
91: ** (where there are three time zone transitions every fourth year).
92: */
93: #define TZ_MAX_TIMES 370
94:
95: #define NOSOLAR /* 4BSD doesn't currently handle solar time */
96:
97: #ifndef NOSOLAR
98: #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
99: #else
100: #define TZ_MAX_TYPES 10 /* Maximum number of local time types */
101: #endif
102:
103: #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
104:
105: #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
106:
107: #define SECSPERMIN 60
108: #define MINSPERHOUR 60
109: #define HOURSPERDAY 24
110: #define DAYSPERWEEK 7
111: #define DAYSPERNYEAR 365
112: #define DAYSPERLYEAR 366
113: #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
114: #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
115: #define MONSPERYEAR 12
116:
117: #define TM_SUNDAY 0
118: #define TM_MONDAY 1
119: #define TM_TUESDAY 2
120: #define TM_WEDNESDAY 3
121: #define TM_THURSDAY 4
122: #define TM_FRIDAY 5
123: #define TM_SATURDAY 6
124:
125: #define TM_JANUARY 0
126: #define TM_FEBRUARY 1
127: #define TM_MARCH 2
128: #define TM_APRIL 3
129: #define TM_MAY 4
130: #define TM_JUNE 5
131: #define TM_JULY 6
132: #define TM_AUGUST 7
133: #define TM_SEPTEMBER 8
134: #define TM_OCTOBER 9
135: #define TM_NOVEMBER 10
136: #define TM_DECEMBER 11
137:
138: #define TM_YEAR_BASE 1900
139:
140: #define EPOCH_YEAR 1970
141: #define EPOCH_WDAY TM_THURSDAY
142:
143: /*
144: ** Accurate only for the past couple of centuries;
145: ** that will probably do.
146: */
147:
1.3 deraadt 148: #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
1.1 deraadt 149:
150: #endif /* !_TZFILE_H_ */
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