1 /* $NetBSD: tzfile.h,v 1.7 2003/08/07 09:44:11 agc 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)tzfile.h 8.1 (Berkeley) 6/2/93 35 */ 36 37 #ifndef _TZFILE_H_ 38 #define _TZFILE_H_ 39 40 /* 41 * Information about time zone files. 42 */ 43 /* Time zone object file directory */ 44 #define TZDIR "/usr/share/zoneinfo" 45 #define TZDEFAULT "/etc/localtime" 46 #define TZDEFRULES "posixrules" 47 48 /* 49 ** Each file begins with. . . 50 */ 51 52 #define TZ_MAGIC "TZif" 53 54 struct tzhead { 55 char tzh_magic[4]; /* TZ_MAGIC */ 56 char tzh_reserved[16]; /* reserved for future use */ 57 char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ 58 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 59 char tzh_leapcnt[4]; /* coded number of leap seconds */ 60 char tzh_timecnt[4]; /* coded number of transition times */ 61 char tzh_typecnt[4]; /* coded number of local time types */ 62 char tzh_charcnt[4]; /* coded number of abbr. chars */ 63 }; 64 65 /* 66 ** . . .followed by. . . 67 ** 68 ** tzh_timecnt (char [4])s coded transition times a la time(2) 69 ** tzh_timecnt (unsigned char)s types of local time starting at above 70 ** tzh_typecnt repetitions of 71 ** one (char [4]) coded UTC offset in seconds 72 ** one (unsigned char) used to set tm_isdst 73 ** one (unsigned char) that's an abbreviation list index 74 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations 75 ** tzh_leapcnt repetitions of 76 ** one (char [4]) coded leap second transition times 77 ** one (char [4]) total correction after above 78 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 79 ** time is standard time, if FALSE, 80 ** transition time is wall clock time 81 ** if absent, transition times are 82 ** assumed to be wall clock time 83 ** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition 84 ** time is UTC, if FALSE, 85 ** transition time is wall clock time 86 ** if absent, transition times are 87 ** assumed to be local time 88 */ 89 90 /* 91 ** In the current implementation, "tzset()" refuses to deal with files that 92 ** exceed any of the limits below. 93 */ 94 95 /* 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). 100 */ 101 #define TZ_MAX_TIMES 370 102 103 #define NOSOLAR /* 4BSD doesn't currently handle solar time */ 104 105 #ifndef NOSOLAR 106 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 107 #else 108 #define TZ_MAX_TYPES 10 /* Maximum number of local time types */ 109 #endif 110 111 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 112 113 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 114 115 #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 12 124 125 #define TM_SUNDAY 0 126 #define TM_MONDAY 1 127 #define TM_TUESDAY 2 128 #define TM_WEDNESDAY 3 129 #define TM_THURSDAY 4 130 #define TM_FRIDAY 5 131 #define TM_SATURDAY 6 132 133 #define TM_JANUARY 0 134 #define TM_FEBRUARY 1 135 #define TM_MARCH 2 136 #define TM_APRIL 3 137 #define TM_MAY 4 138 #define TM_JUNE 5 139 #define TM_JULY 6 140 #define TM_AUGUST 7 141 #define TM_SEPTEMBER 8 142 #define TM_OCTOBER 9 143 #define TM_NOVEMBER 10 144 #define TM_DECEMBER 11 145 146 #define TM_YEAR_BASE 1900 147 148 #define EPOCH_YEAR 1970 149 #define EPOCH_WDAY TM_THURSDAY 150 151 /* 152 ** Accurate only for the past couple of centuries; 153 ** that will probably do. 154 */ 155 156 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) 157 158 #endif /* !_TZFILE_H_ */ 159
