1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
#ifndef TZFILE_INCLUDED
#define TZFILE_INCLUDED
/* Copyright (c) 2004, 2006, 2007 MySQL AB, 2009 Sun Microsystems, Inc.
Use is subject to license terms.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
/*
This file is based on public domain code from ftp://elsie.ncih.nist.gov/
Initial source code is in the public domain, so clarified as of
1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
*/
/*
Information about time zone files.
*/
#ifndef TZDIR
#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */
#endif /* !defined TZDIR */
/*
Each file begins with. . .
*/
#define TZ_MAGIC "TZif"
struct tzhead {
uchar tzh_magic[4]; /* TZ_MAGIC */
uchar tzh_reserved[16]; /* reserved for future use */
uchar tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
uchar tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
uchar tzh_leapcnt[4]; /* coded number of leap seconds */
uchar tzh_timecnt[4]; /* coded number of transition times */
uchar tzh_typecnt[4]; /* coded number of local time types */
uchar tzh_charcnt[4]; /* coded number of abbr. chars */
};
/*
. . .followed by. . .
tzh_timecnt (char [4])s coded transition times a la time(2)
tzh_timecnt (unsigned char)s types of local time starting at above
tzh_typecnt repetitions of
one (char [4]) coded UTC offset in seconds
one (unsigned char) used to set tm_isdst
one (unsigned char) that's an abbreviation list index
tzh_charcnt (char)s '\0'-terminated zone abbreviations
tzh_leapcnt repetitions of
one (char [4]) coded leap second transition times
one (char [4]) total correction after above
tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
time is standard time, if FALSE,
transition time is wall clock time
if absent, transition times are
assumed to be wall clock time
tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition
time is UTC, if FALSE,
transition time is local time
if absent, transition times are
assumed to be local time
*/
/*
In the current implementation, we refuse to deal with files that
exceed any of the limits below.
*/
#ifndef TZ_MAX_TIMES
/*
The TZ_MAX_TIMES value below is enough to handle a bit more than a
year's worth of solar time (corrected daily to the nearest second) or
138 years of Pacific Presidential Election time
(where there are three time zone transitions every fourth year).
*/
#define TZ_MAX_TIMES 370
#endif /* !defined TZ_MAX_TIMES */
#ifndef TZ_MAX_TYPES
#ifdef SOLAR
#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
#else
/*
Must be at least 14 for Europe/Riga as of Jan 12 1995,
as noted by Earl Chew <earl@hpato.aus.hp.com>.
*/
#define TZ_MAX_TYPES 20 /* Maximum number of local time types */
#endif /* defined SOLAR */
#endif /* !defined TZ_MAX_TYPES */
#ifndef TZ_MAX_CHARS
#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
/* (limited by what unsigned chars can hold) */
#endif /* !defined TZ_MAX_CHARS */
#ifndef TZ_MAX_LEAPS
#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
#endif /* !defined TZ_MAX_LEAPS */
#ifndef TZ_MAX_REV_RANGES
#ifdef SOLAR
/* Solar (Asia/RiyadhXX) zones need significantly bigger TZ_MAX_REV_RANGES */
#define TZ_MAX_REV_RANGES (TZ_MAX_TIMES*2+TZ_MAX_LEAPS*2+2)
#else
#define TZ_MAX_REV_RANGES (TZ_MAX_TIMES+TZ_MAX_LEAPS+2)
#endif
#endif
#define SECS_PER_MIN 60
#define MINS_PER_HOUR 60
#define HOURS_PER_DAY 24
#define DAYS_PER_WEEK 7
#define DAYS_PER_NYEAR 365
#define DAYS_PER_LYEAR 366
#define SECS_PER_HOUR (SECS_PER_MIN * MINS_PER_HOUR)
#define SECS_PER_DAY ((long) SECS_PER_HOUR * HOURS_PER_DAY)
#define MONS_PER_YEAR 12
#define TM_YEAR_BASE 1900
#define EPOCH_YEAR 1970
/*
Accurate only for the past couple of centuries,
that will probably do.
*/
#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
#endif
|
