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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) 1988, 1993
24: * The Regents of the University of California. All rights reserved.
25: *
26: * This code is derived from software contributed to Berkeley by
27: * Arthur David Olson of the National Cancer Institute.
28: *
29: * Redistribution and use in source and binary forms, with or without
30: * modification, are permitted provided that the following conditions
31: * are met:
32: * 1. Redistributions of source code must retain the above copyright
33: * notice, this list of conditions and the following disclaimer.
34: * 2. Redistributions in binary form must reproduce the above copyright
35: * notice, this list of conditions and the following disclaimer in the
36: * documentation and/or other materials provided with the distribution.
37: * 3. All advertising materials mentioning features or use of this software
38: * must display the following acknowledgement:
39: * This product includes software developed by the University of
40: * California, Berkeley and its contributors.
41: * 4. Neither the name of the University nor the names of its contributors
42: * may be used to endorse or promote products derived from this software
43: * without specific prior written permission.
44: *
45: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55: * SUCH DAMAGE.
56: *
57: * @(#)tzfile.h 8.1 (Berkeley) 6/2/93
58: */
59:
60: #ifndef _TZFILE_H_
61: #define _TZFILE_H_
62:
63: /*
64: * Information about time zone files.
65: */
66: /* Time zone object file directory */
67: #define TZDIR "/usr/share/zoneinfo"
68: #define TZDEFAULT "/etc/localtime"
69: #define TZDEFRULES "posixrules"
70:
71: /*
72: ** Each file begins with. . .
73: */
74:
75: struct tzhead {
76: char tzh_reserved[24]; /* reserved for future use */
77: char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
78: char tzh_leapcnt[4]; /* coded number of leap seconds */
79: char tzh_timecnt[4]; /* coded number of transition times */
80: char tzh_typecnt[4]; /* coded number of local time types */
81: char tzh_charcnt[4]; /* coded number of abbr. chars */
82: };
83:
84: /*
85: ** . . .followed by. . .
86: **
87: ** tzh_timecnt (char [4])s coded transition times a la time(2)
88: ** tzh_timecnt (unsigned char)s types of local time starting at above
89: ** tzh_typecnt repetitions of
90: ** one (char [4]) coded GMT offset in seconds
91: ** one (unsigned char) used to set tm_isdst
92: ** one (unsigned char) that's an abbreviation list index
93: ** tzh_charcnt (char)s '\0'-terminated zone abbreviations
94: ** tzh_leapcnt repetitions of
95: ** one (char [4]) coded leap second transition times
96: ** one (char [4]) total correction after above
97: ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
98: ** time is standard time, if FALSE,
99: ** transition time is wall clock time
100: ** if absent, transition times are
101: ** assumed to be wall clock time
102: */
103:
104: /*
105: ** In the current implementation, "tzset()" refuses to deal with files that
106: ** exceed any of the limits below.
107: */
108:
109: /*
110: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
111: ** year's worth of solar time (corrected daily to the nearest second) or
112: ** 138 years of Pacific Presidential Election time
113: ** (where there are three time zone transitions every fourth year).
114: */
115: #define TZ_MAX_TIMES 370
116:
117: #define NOSOLAR /* 4BSD doesn't currently handle solar time */
118:
119: #ifndef NOSOLAR
120: #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
121: #else
122: #define TZ_MAX_TYPES 10 /* Maximum number of local time types */
123: #endif
124:
125: #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
126:
127: #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
128:
129: #define SECSPERMIN 60
130: #define MINSPERHOUR 60
131: #define HOURSPERDAY 24
132: #define DAYSPERWEEK 7
133: #define DAYSPERNYEAR 365
134: #define DAYSPERLYEAR 366
135: #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
136: #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
137: #define MONSPERYEAR 12
138:
139: #define TM_SUNDAY 0
140: #define TM_MONDAY 1
141: #define TM_TUESDAY 2
142: #define TM_WEDNESDAY 3
143: #define TM_THURSDAY 4
144: #define TM_FRIDAY 5
145: #define TM_SATURDAY 6
146:
147: #define TM_JANUARY 0
148: #define TM_FEBRUARY 1
149: #define TM_MARCH 2
150: #define TM_APRIL 3
151: #define TM_MAY 4
152: #define TM_JUNE 5
153: #define TM_JULY 6
154: #define TM_AUGUST 7
155: #define TM_SEPTEMBER 8
156: #define TM_OCTOBER 9
157: #define TM_NOVEMBER 10
158: #define TM_DECEMBER 11
159:
160: #define TM_YEAR_BASE 1900
161:
162: #define EPOCH_YEAR 1970
163: #define EPOCH_WDAY TM_THURSDAY
164:
165: /*
166: ** Accurate only for the past couple of centuries;
167: ** that will probably do.
168: */
169:
170: #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)
171:
172: #endif /* !_TZFILE_H_ */
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