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