tzfile.h revision 1.6
1 /* $NetBSD: tzfile.h,v 1.6 1998/07/30 14:11:22 kleink Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Arthur David Olson of the National Cancer Institute. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)tzfile.h 8.1 (Berkeley) 6/2/93 39 */ 40 41 #ifndef _TZFILE_H_ 42 #define _TZFILE_H_ 43 44 /* 45 * Information about time zone files. 46 */ 47 /* Time zone object file directory */ 48 #define TZDIR "/usr/share/zoneinfo" 49 #define TZDEFAULT "/etc/localtime" 50 #define TZDEFRULES "posixrules" 51 52 /* 53 ** Each file begins with. . . 54 */ 55 56 #define TZ_MAGIC "TZif" 57 58 struct tzhead { 59 char tzh_magic[4]; /* TZ_MAGIC */ 60 char tzh_reserved[16]; /* reserved for future use */ 61 char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ 62 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 63 char tzh_leapcnt[4]; /* coded number of leap seconds */ 64 char tzh_timecnt[4]; /* coded number of transition times */ 65 char tzh_typecnt[4]; /* coded number of local time types */ 66 char tzh_charcnt[4]; /* coded number of abbr. chars */ 67 }; 68 69 /* 70 ** . . .followed by. . . 71 ** 72 ** tzh_timecnt (char [4])s coded transition times a la time(2) 73 ** tzh_timecnt (unsigned char)s types of local time starting at above 74 ** tzh_typecnt repetitions of 75 ** one (char [4]) coded UTC offset in seconds 76 ** one (unsigned char) used to set tm_isdst 77 ** one (unsigned char) that's an abbreviation list index 78 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations 79 ** tzh_leapcnt repetitions of 80 ** one (char [4]) coded leap second transition times 81 ** one (char [4]) total correction after above 82 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 83 ** time is standard time, if FALSE, 84 ** transition time is wall clock time 85 ** if absent, transition times are 86 ** assumed to be wall clock time 87 ** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition 88 ** time is UTC, if FALSE, 89 ** transition time is wall clock time 90 ** if absent, transition times are 91 ** assumed to be local time 92 */ 93 94 /* 95 ** In the current implementation, "tzset()" refuses to deal with files that 96 ** exceed any of the limits below. 97 */ 98 99 /* 100 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a 101 ** year's worth of solar time (corrected daily to the nearest second) or 102 ** 138 years of Pacific Presidential Election time 103 ** (where there are three time zone transitions every fourth year). 104 */ 105 #define TZ_MAX_TIMES 370 106 107 #define NOSOLAR /* 4BSD doesn't currently handle solar time */ 108 109 #ifndef NOSOLAR 110 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 111 #else 112 #define TZ_MAX_TYPES 10 /* Maximum number of local time types */ 113 #endif 114 115 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 116 117 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 118 119 #define SECSPERMIN 60 120 #define MINSPERHOUR 60 121 #define HOURSPERDAY 24 122 #define DAYSPERWEEK 7 123 #define DAYSPERNYEAR 365 124 #define DAYSPERLYEAR 366 125 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 126 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY) 127 #define MONSPERYEAR 12 128 129 #define TM_SUNDAY 0 130 #define TM_MONDAY 1 131 #define TM_TUESDAY 2 132 #define TM_WEDNESDAY 3 133 #define TM_THURSDAY 4 134 #define TM_FRIDAY 5 135 #define TM_SATURDAY 6 136 137 #define TM_JANUARY 0 138 #define TM_FEBRUARY 1 139 #define TM_MARCH 2 140 #define TM_APRIL 3 141 #define TM_MAY 4 142 #define TM_JUNE 5 143 #define TM_JULY 6 144 #define TM_AUGUST 7 145 #define TM_SEPTEMBER 8 146 #define TM_OCTOBER 9 147 #define TM_NOVEMBER 10 148 #define TM_DECEMBER 11 149 150 #define TM_YEAR_BASE 1900 151 152 #define EPOCH_YEAR 1970 153 #define EPOCH_WDAY TM_THURSDAY 154 155 /* 156 ** Accurate only for the past couple of centuries; 157 ** that will probably do. 158 */ 159 160 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) 161 162 #endif /* !_TZFILE_H_ */ 163
Indexes created Mon Sep 29 18:09:42 GMT 2025