1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26/*	Copyright (c) 1988 AT&T	*/
27/*	  All Rights Reserved	*/
28
29#ifndef _TZFILE_H
30#define	_TZFILE_H
31
32#pragma ident	"%Z%%M%	%I%	%E% SMI"
33
34/*
35 * A part of this file comes from public domain source, so
36 * clarified as of June 5, 1996 by Arthur David Olson
37 */
38
39#include <sys/types.h>
40
41/*
42 * WARNING:
43 * The interfaces defined in this header file are for Sun private use only.
44 * The contents of this file are subject to change without notice for the
45 * future releases.
46 */
47
48/* For further information, see ctime(3C) and zic(1M) man pages. */
49
50/*
51 * This file is in the public domain, so clarified as of
52 * 1996-06-05 by Arthur David Olson.
53 */
54
55/*
56 * This header is for use ONLY with the time conversion code.
57 * There is no guarantee that it will remain unchanged,
58 * or that it will remain at all.
59 * Do NOT copy it to any system include directory.
60 * Thank you!
61 */
62
63/* static char	tzfilehid[] = "@(#)tzfile.h	7.18"; */
64
65/*
66 * Note: Despite warnings from the authors of this code, Solaris has
67 * placed this header file in the system include directory.  This was
68 * probably done in order to build both zic and zdump which are in
69 * separate source directories, but both use this file.
70 */
71
72#ifdef	__cplusplus
73extern "C" {
74#endif
75
76/*
77 * Information about time zone files.
78 */
79
80#ifndef TZDIR
81#define	TZDIR	"/usr/share/lib/zoneinfo" /* Time zone object file directory */
82#endif /* !defined TZDIR */
83
84#ifndef TZDEFAULT
85#define	TZDEFAULT	"localtime"
86#endif /* !defined TZDEFAULT */
87
88#ifndef TZDEFRULES
89#define	TZDEFRULES	"posixrules"
90#endif /* !defined TZDEFRULES */
91
92/*
93 * Each file begins with. . .
94 */
95
96#define	TZ_MAGIC	"TZif"
97
98struct tzhead {
99	char	tzh_magic[4];		/* TZ_MAGIC */
100	char	tzh_reserved[16];	/* reserved for future use */
101	char	tzh_ttisgmtcnt[4];	/* coded number of trans. time flags */
102	char	tzh_ttisstdcnt[4];	/* coded number of trans. time flags */
103	char	tzh_leapcnt[4];		/* coded number of leap seconds */
104	char	tzh_timecnt[4];		/* coded number of transition times */
105	char	tzh_typecnt[4];		/* coded number of local time types */
106	char	tzh_charcnt[4];		/* coded number of abbr. chars */
107};
108
109/*
110 * . . .followed by. . .
111 *
112 *	tzh_timecnt (char [4])s		coded transition times a la time(2)
113 *	tzh_timecnt (unsigned char)s	types of local time starting at above
114 *	tzh_typecnt repetitions of
115 *		one (char [4])		coded UTC offset in seconds
116 *		one (unsigned char)	used to set tm_isdst
117 *		one (unsigned char)	that's an abbreviation list index
118 *	tzh_charcnt (char)s		'\0'-terminated zone abbreviations
119 *	tzh_leapcnt repetitions of
120 *		one (char [4])		coded leap second transition times
121 *		one (char [4])		total correction after above
122 *	tzh_ttisstdcnt (char)s		indexed by type; if TRUE, transition
123 *					time is standard time, if FALSE,
124 *					transition time is wall clock time
125 *					if absent, transition times are
126 *					assumed to be wall clock time
127 *	tzh_ttisgmtcnt (char)s		indexed by type; if TRUE, transition
128 *					time is UTC, if FALSE,
129 *					transition time is local time
130 *					if absent, transition times are
131 *					assumed to be local time
132 */
133
134/*
135 * In the current implementation, "tzset()" refuses to deal with files that
136 * exceed any of the limits below.
137 */
138
139#ifndef TZ_MAX_TIMES
140/*
141 * The TZ_MAX_TIMES value below is enough to handle a bit more than a
142 * year's worth of solar time (corrected daily to the nearest second) or
143 * 138 years of Pacific Presidential Election time
144 * (where there are three time zone transitions every fourth year).
145 */
146#define	TZ_MAX_TIMES	370
147#endif /* !defined TZ_MAX_TIMES */
148
149#ifndef TZ_MAX_TYPES
150#ifndef NOSOLAR
151#define	TZ_MAX_TYPES	256 /* Limited by what (unsigned char)'s can hold */
152#endif /* !defined NOSOLAR */
153#ifdef NOSOLAR
154/*
155 * Must be at least 14 for Europe/Riga as of Jan 12 1995,
156 * as noted by Earl Chew.
157 */
158#define	TZ_MAX_TYPES	20	/* Maximum number of local time types */
159#endif /* !defined NOSOLAR */
160#endif /* !defined TZ_MAX_TYPES */
161
162#ifndef TZ_MAX_CHARS
163#define	TZ_MAX_CHARS	50	/* Maximum number of abbreviation characters */
164				/* (limited by what unsigned chars can hold) */
165#endif /* !defined TZ_MAX_CHARS */
166
167#ifndef TZ_MAX_LEAPS
168#define	TZ_MAX_LEAPS	50	/* Maximum number of leap second corrections */
169#endif /* !defined TZ_MAX_LEAPS */
170
171#define	SECSPERMIN	60
172#define	MINSPERHOUR	60
173#define	HOURSPERDAY	24
174#define	DAYSPERWEEK	7
175#define	DAYSPERNYEAR	365
176#define	DAYSPERLYEAR	366
177#define	SECSPERHOUR	(SECSPERMIN * MINSPERHOUR)
178#define	SECSPERDAY	((time_t)SECSPERHOUR * HOURSPERDAY)
179#define	MONSPERYEAR	12
180
181#define	TM_SUNDAY	0
182#define	TM_MONDAY	1
183#define	TM_TUESDAY	2
184#define	TM_WEDNESDAY	3
185#define	TM_THURSDAY	4
186#define	TM_FRIDAY	5
187#define	TM_SATURDAY	6
188
189#define	TM_JANUARY	0
190#define	TM_FEBRUARY	1
191#define	TM_MARCH	2
192#define	TM_APRIL	3
193#define	TM_MAY		4
194#define	TM_JUNE		5
195#define	TM_JULY		6
196#define	TM_AUGUST	7
197#define	TM_SEPTEMBER	8
198#define	TM_OCTOBER	9
199#define	TM_NOVEMBER	10
200#define	TM_DECEMBER	11
201
202#define	TM_YEAR_BASE	1900
203
204#define	EPOCH_YEAR	1970
205#define	EPOCH_WDAY	TM_THURSDAY
206
207#define	isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
208
209#ifndef USG
210
211/*
212 * Use of the underscored variants may cause problems if you move your code to
213 * certain System-V-based systems; for maximum portability, use the
214 * underscore-free variants.  The underscored variants are provided for
215 * backward compatibility only; they may disappear from future versions of
216 * this file.
217 */
218
219#define	SECS_PER_MIN	SECSPERMIN
220#define	MINS_PER_HOUR	MINSPERHOUR
221#define	HOURS_PER_DAY	HOURSPERDAY
222#define	DAYS_PER_WEEK	DAYSPERWEEK
223#define	DAYS_PER_NYEAR	DAYSPERNYEAR
224#define	DAYS_PER_LYEAR	DAYSPERLYEAR
225#define	SECS_PER_HOUR	SECSPERHOUR
226#define	SECS_PER_DAY	SECSPERDAY
227#define	MONS_PER_YEAR	MONSPERYEAR
228
229#endif /* !defined USG */
230
231/*
232 * Since everything in isleap is modulo 400 (or a factor of 400), we know that
233 *	isleap(y) == isleap(y % 400)
234 * and so
235 *	isleap(a + b) == isleap((a + b) % 400)
236 * or
237 *	isleap(a + b) == isleap(a % 400 + b % 400)
238 * This is true even if % means modulo rather than Fortran remainder
239 * (which is allowed by C89 but not C99).
240 * We use this to avoid addition overflow problems.
241 */
242
243#define	isleap_sum(a, b)	isleap((a) % 400 + (b) % 400)
244
245#ifdef	__cplusplus
246}
247#endif
248
249#endif	/* _TZFILE_H */
250