2 * Ported to Linux's Second Extended File System as part of the
3 * dump and restore backup suit
4 * Remy Card <Remy.Card@freenix.fr>, 1994, 1995
9 * Copyright (c) 1988, 1993
10 * The Regents of the University of California. All rights reserved.
12 * This code is derived from software contributed to Berkeley by
13 * Arthur David Olson of the National Cancer Institute.
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. All advertising materials mentioning features or use of this software
24 * must display the following acknowledgement:
25 * This product includes software developed by the University of
26 * California, Berkeley and its contributors.
27 * 4. Neither the name of the University nor the names of its contributors
28 * may be used to endorse or promote products derived from this software
29 * without specific prior written permission.
31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * @(#)tzfile.h 8.1 (Berkeley) 6/2/93
50 * Information about time zone files.
52 /* Time zone object file directory */
53 #define TZDIR "/usr/share/zoneinfo"
54 #define TZDEFAULT "/etc/localtime"
55 #define TZDEFRULES "posixrules"
58 ** Each file begins with. . .
62 char tzh_reserved[24]; /* reserved for future use */
63 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
64 char tzh_leapcnt[4]; /* coded number of leap seconds */
65 char tzh_timecnt[4]; /* coded number of transition times */
66 char tzh_typecnt[4]; /* coded number of local time types */
67 char tzh_charcnt[4]; /* coded number of abbr. chars */
71 ** . . .followed by. . .
73 ** tzh_timecnt (char [4])s coded transition times a la time(2)
74 ** tzh_timecnt (unsigned char)s types of local time starting at above
75 ** tzh_typecnt repetitions of
76 ** one (char [4]) coded GMT offset in seconds
77 ** one (unsigned char) used to set tm_isdst
78 ** one (unsigned char) that's an abbreviation list index
79 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations
80 ** tzh_leapcnt repetitions of
81 ** one (char [4]) coded leap second transition times
82 ** one (char [4]) total correction after above
83 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
84 ** time is standard time, if FALSE,
85 ** transition time is wall clock time
86 ** if absent, transition times are
87 ** assumed to be wall clock time
91 ** In the current implementation, "tzset()" refuses to deal with files that
92 ** exceed any of the limits below.
96 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
97 ** year's worth of solar time (corrected daily to the nearest second) or
98 ** 138 years of Pacific Presidential Election time
99 ** (where there are three time zone transitions every fourth year).
101 #define TZ_MAX_TIMES 370
103 #define NOSOLAR /* 4BSD doesn't currently handle solar time */
106 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
108 #define TZ_MAX_TYPES 10 /* Maximum number of local time types */
111 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
113 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
115 #define SECSPERMIN 60
116 #define MINSPERHOUR 60
117 #define HOURSPERDAY 24
118 #define DAYSPERWEEK 7
119 #define DAYSPERNYEAR 365
120 #define DAYSPERLYEAR 366
121 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
122 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
123 #define MONSPERYEAR 12
128 #define TM_WEDNESDAY 3
129 #define TM_THURSDAY 4
131 #define TM_SATURDAY 6
134 #define TM_FEBRUARY 1
141 #define TM_SEPTEMBER 8
143 #define TM_NOVEMBER 10
144 #define TM_DECEMBER 11
146 #define TM_YEAR_BASE 1900
148 #define EPOCH_YEAR 1970
149 #define EPOCH_WDAY TM_THURSDAY
152 ** Accurate only for the past couple of centuries;
153 ** that will probably do.
156 #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)
158 #endif /* !_TZFILE_H_ */