1 /* $OpenBSD: tzfile.h,v 1.4 2003/06/02 19:34:12 millert Exp $ */ 2 /* $NetBSD: tzfile.h,v 1.3 1994/10/26 00:56:37 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1988 Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Arthur David Olson of the National Cancer Institute. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)tzfile.h 5.10 (Berkeley) 4/3/91 36 */ 37 38 #ifndef _TZFILE_H_ 39 #define _TZFILE_H_ 40 41 /* 42 * Information about time zone files. 43 */ 44 /* Time zone object file directory */ 45 #define TZDIR "/usr/share/zoneinfo" 46 #define TZDEFAULT "/etc/localtime" 47 #define TZDEFRULES "posixrules" 48 49 /* 50 ** Each file begins with. . . 51 */ 52 53 struct tzhead { 54 char tzh_reserved[24]; /* reserved for future use */ 55 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 56 char tzh_leapcnt[4]; /* coded number of leap seconds */ 57 char tzh_timecnt[4]; /* coded number of transition times */ 58 char tzh_typecnt[4]; /* coded number of local time types */ 59 char tzh_charcnt[4]; /* coded number of abbr. chars */ 60 }; 61 62 /* 63 ** . . .followed by. . . 64 ** 65 ** tzh_timecnt (char [4])s coded transition times a la time(2) 66 ** tzh_timecnt (unsigned char)s types of local time starting at above 67 ** tzh_typecnt repetitions of 68 ** one (char [4]) coded GMT offset in seconds 69 ** one (unsigned char) used to set tm_isdst 70 ** one (unsigned char) that's an abbreviation list index 71 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations 72 ** tzh_leapcnt repetitions of 73 ** one (char [4]) coded leap second transition times 74 ** one (char [4]) total correction after above 75 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 76 ** time is standard time, if FALSE, 77 ** transition time is wall clock time 78 ** if absent, transition times are 79 ** assumed to be wall clock time 80 */ 81 82 /* 83 ** In the current implementation, "tzset()" refuses to deal with files that 84 ** exceed any of the limits below. 85 */ 86 87 /* 88 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a 89 ** year's worth of solar time (corrected daily to the nearest second) or 90 ** 138 years of Pacific Presidential Election time 91 ** (where there are three time zone transitions every fourth year). 92 */ 93 #define TZ_MAX_TIMES 370 94 95 #define NOSOLAR /* 4BSD doesn't currently handle solar time */ 96 97 #ifndef NOSOLAR 98 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 99 #else 100 #define TZ_MAX_TYPES 10 /* Maximum number of local time types */ 101 #endif 102 103 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 104 105 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 106 107 #define SECSPERMIN 60 108 #define MINSPERHOUR 60 109 #define HOURSPERDAY 24 110 #define DAYSPERWEEK 7 111 #define DAYSPERNYEAR 365 112 #define DAYSPERLYEAR 366 113 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 114 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY) 115 #define MONSPERYEAR 12 116 117 #define TM_SUNDAY 0 118 #define TM_MONDAY 1 119 #define TM_TUESDAY 2 120 #define TM_WEDNESDAY 3 121 #define TM_THURSDAY 4 122 #define TM_FRIDAY 5 123 #define TM_SATURDAY 6 124 125 #define TM_JANUARY 0 126 #define TM_FEBRUARY 1 127 #define TM_MARCH 2 128 #define TM_APRIL 3 129 #define TM_MAY 4 130 #define TM_JUNE 5 131 #define TM_JULY 6 132 #define TM_AUGUST 7 133 #define TM_SEPTEMBER 8 134 #define TM_OCTOBER 9 135 #define TM_NOVEMBER 10 136 #define TM_DECEMBER 11 137 138 #define TM_YEAR_BASE 1900 139 140 #define EPOCH_YEAR 1970 141 #define EPOCH_WDAY TM_THURSDAY 142 143 /* 144 ** Accurate only for the past couple of centuries; 145 ** that will probably do. 146 */ 147 148 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) 149 150 #endif /* !_TZFILE_H_ */ 151