1 /* 2 * Copyright (c) 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Arthur David Olson of the National Cancer Institute. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * $Id: tzfile.h,v 1.1 94/10/20 00:53:49 bill Exp $ 37 */ 38 39 #ifndef _TZFILE_H_ 40 #define _TZFILE_H_ 41 42 /* 43 * Information about time zone files. 44 */ 45 /* Time zone object file directory */ 46 #define TZDIR "/usr/share/zoneinfo" 47 #define TZDEFAULT "/etc/localtime" 48 #define TZDEFRULES "posixrules" 49 50 /* 51 ** Each file begins with. . . 52 */ 53 54 struct tzhead { 55 char tzh_reserved[24]; /* reserved for future use */ 56 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 57 char tzh_leapcnt[4]; /* coded number of leap seconds */ 58 char tzh_timecnt[4]; /* coded number of transition times */ 59 char tzh_typecnt[4]; /* coded number of local time types */ 60 char tzh_charcnt[4]; /* coded number of abbr. chars */ 61 }; 62 63 /* 64 ** . . .followed by. . . 65 ** 66 ** tzh_timecnt (char [4])s coded transition times a la time(2) 67 ** tzh_timecnt (unsigned char)s types of local time starting at above 68 ** tzh_typecnt repetitions of 69 ** one (char [4]) coded GMT offset in seconds 70 ** one (unsigned char) used to set tm_isdst 71 ** one (unsigned char) that's an abbreviation list index 72 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations 73 ** tzh_leapcnt repetitions of 74 ** one (char [4]) coded leap second transition times 75 ** one (char [4]) total correction after above 76 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 77 ** time is standard time, if FALSE, 78 ** transition time is wall clock time 79 ** if absent, transition times are 80 ** assumed to be wall clock time 81 */ 82 83 /* 84 ** In the current implementation, "tzset()" refuses to deal with files that 85 ** exceed any of the limits below. 86 */ 87 88 /* 89 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a 90 ** year's worth of solar time (corrected daily to the nearest second) or 91 ** 138 years of Pacific Presidential Election time 92 ** (where there are three time zone transitions every fourth year). 93 */ 94 #define TZ_MAX_TIMES 370 95 96 #define NOSOLAR /* 4BSD doesn't currently handle solar time */ 97 98 #ifndef NOSOLAR 99 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 100 #else 101 #define TZ_MAX_TYPES 10 /* Maximum number of local time types */ 102 #endif 103 104 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 105 106 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 107 108 #define SECSPERMIN 60 109 #define MINSPERHOUR 60 110 #define HOURSPERDAY 24 111 #define DAYSPERWEEK 7 112 #define DAYSPERNYEAR 365 113 #define DAYSPERLYEAR 366 114 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 115 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY) 116 #define MONSPERYEAR 12 117 118 #define TM_SUNDAY 0 119 #define TM_MONDAY 1 120 #define TM_TUESDAY 2 121 #define TM_WEDNESDAY 3 122 #define TM_THURSDAY 4 123 #define TM_FRIDAY 5 124 #define TM_SATURDAY 6 125 126 #define TM_JANUARY 0 127 #define TM_FEBRUARY 1 128 #define TM_MARCH 2 129 #define TM_APRIL 3 130 #define TM_MAY 4 131 #define TM_JUNE 5 132 #define TM_JULY 6 133 #define TM_AUGUST 7 134 #define TM_SEPTEMBER 8 135 #define TM_OCTOBER 9 136 #define TM_NOVEMBER 10 137 #define TM_DECEMBER 11 138 139 #define TM_YEAR_BASE 1900 140 141 #define EPOCH_YEAR 1970 142 #define EPOCH_WDAY TM_THURSDAY 143 144 /* 145 ** Accurate only for the past couple of centuries; 146 ** that will probably do. 147 */ 148 149 #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0) 150 151 #endif /* !_TZFILE_H_ */ 152