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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /*
26: * Copyright (c) 1988, 1993
27: * The Regents of the University of California. All rights reserved.
28: *
29: * This code is derived from software contributed to Berkeley by
30: * Arthur David Olson of the National Cancer Institute.
31: *
32: * Redistribution and use in source and binary forms, with or without
33: * modification, are permitted provided that the following conditions
34: * are met:
35: * 1. Redistributions of source code must retain the above copyright
36: * notice, this list of conditions and the following disclaimer.
37: * 2. Redistributions in binary form must reproduce the above copyright
38: * notice, this list of conditions and the following disclaimer in the
39: * documentation and/or other materials provided with the distribution.
40: * 3. All advertising materials mentioning features or use of this software
41: * must display the following acknowledgement:
42: * This product includes software developed by the University of
43: * California, Berkeley and its contributors.
44: * 4. Neither the name of the University nor the names of its contributors
45: * may be used to endorse or promote products derived from this software
46: * without specific prior written permission.
47: *
48: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58: * SUCH DAMAGE.
59: *
60: * @(#)tzfile.h 8.1 (Berkeley) 6/2/93
61: */
62:
63: #ifndef _TZFILE_H_
64: #define _TZFILE_H_
65:
66: /*
67: * Information about time zone files.
68: */
69: /* Time zone object file directory */
70: #define TZDIR "/usr/share/zoneinfo"
71: #define TZDEFAULT "/etc/localtime"
72: #define TZDEFRULES "posixrules"
73:
74: /*
75: ** Each file begins with. . .
76: */
77:
78: struct tzhead {
79: char tzh_reserved[24]; /* reserved for future use */
80: char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
81: char tzh_leapcnt[4]; /* coded number of leap seconds */
82: char tzh_timecnt[4]; /* coded number of transition times */
83: char tzh_typecnt[4]; /* coded number of local time types */
84: char tzh_charcnt[4]; /* coded number of abbr. chars */
85: };
86:
87: /*
88: ** . . .followed by. . .
89: **
90: ** tzh_timecnt (char [4])s coded transition times a la time(2)
91: ** tzh_timecnt (unsigned char)s types of local time starting at above
92: ** tzh_typecnt repetitions of
93: ** one (char [4]) coded GMT offset in seconds
94: ** one (unsigned char) used to set tm_isdst
95: ** one (unsigned char) that's an abbreviation list index
96: ** tzh_charcnt (char)s '\0'-terminated zone abbreviations
97: ** tzh_leapcnt repetitions of
98: ** one (char [4]) coded leap second transition times
99: ** one (char [4]) total correction after above
100: ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
101: ** time is standard time, if FALSE,
102: ** transition time is wall clock time
103: ** if absent, transition times are
104: ** assumed to be wall clock time
105: */
106:
107: /*
108: ** In the current implementation, "tzset()" refuses to deal with files that
109: ** exceed any of the limits below.
110: */
111:
112: /*
113: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
114: ** year's worth of solar time (corrected daily to the nearest second) or
115: ** 138 years of Pacific Presidential Election time
116: ** (where there are three time zone transitions every fourth year).
117: */
118: #define TZ_MAX_TIMES 370
119:
120: #define NOSOLAR /* 4BSD doesn't currently handle solar time */
121:
122: #ifndef NOSOLAR
123: #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
124: #else
125: #define TZ_MAX_TYPES 10 /* Maximum number of local time types */
126: #endif
127:
128: #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
129:
130: #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
131:
132: #define SECSPERMIN 60
133: #define MINSPERHOUR 60
134: #define HOURSPERDAY 24
135: #define DAYSPERWEEK 7
136: #define DAYSPERNYEAR 365
137: #define DAYSPERLYEAR 366
138: #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
139: #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
140: #define MONSPERYEAR 12
141:
142: #define TM_SUNDAY 0
143: #define TM_MONDAY 1
144: #define TM_TUESDAY 2
145: #define TM_WEDNESDAY 3
146: #define TM_THURSDAY 4
147: #define TM_FRIDAY 5
148: #define TM_SATURDAY 6
149:
150: #define TM_JANUARY 0
151: #define TM_FEBRUARY 1
152: #define TM_MARCH 2
153: #define TM_APRIL 3
154: #define TM_MAY 4
155: #define TM_JUNE 5
156: #define TM_JULY 6
157: #define TM_AUGUST 7
158: #define TM_SEPTEMBER 8
159: #define TM_OCTOBER 9
160: #define TM_NOVEMBER 10
161: #define TM_DECEMBER 11
162:
163: #define TM_YEAR_BASE 1900
164:
165: #define EPOCH_YEAR 1970
166: #define EPOCH_WDAY TM_THURSDAY
167:
168: /*
169: ** Accurate only for the past couple of centuries;
170: ** that will probably do.
171: */
172:
173: #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)
174:
175: #endif /* !_TZFILE_H_ */
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