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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* from Arthur Olson's 6.1 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #ifndef TZFILE_H 32 33 #define TZFILE_H 34 35 /* 36 ** Information about time zone files. 37 */ 38 39 #define TZDIR "/usr/share/lib/zoneinfo" /* Time zone object file directory */ 40 41 #define TZDEFAULT (getenv("TZ")) 42 43 #define TZDEFRULES "posixrules" 44 45 /* 46 ** Each file begins with. . . 47 */ 48 49 struct tzhead { 50 char tzh_reserved[24]; /* reserved for future use */ 51 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 52 char tzh_leapcnt[4]; /* coded number of leap seconds */ 53 char tzh_timecnt[4]; /* coded number of transition times */ 54 char tzh_typecnt[4]; /* coded number of local time types */ 55 char tzh_charcnt[4]; /* coded number of abbr. chars */ 56 }; 57 58 /* 59 ** . . .followed by. . . 60 ** 61 ** tzh_timecnt (char [4])s coded transition times a la time(2) 62 ** tzh_timecnt (unsigned char)s types of local time starting at above 63 ** tzh_typecnt repetitions of 64 ** one (char [4]) coded GMT offset in seconds 65 ** one (unsigned char) used to set tm_isdst 66 ** one (unsigned char) that's an abbreviation list index 67 ** tzh_charcnt (char)s '\0'-terminated zone abbreviations 68 ** tzh_leapcnt repetitions of 69 ** one (char [4]) coded leap second transition times 70 ** one (char [4]) total correction after above 71 ** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 72 ** time is standard time, if FALSE, 73 ** transition time is wall clock time 74 ** if absent, transition times are 75 ** assumed to be wall clock time 76 */ 77 78 /* 79 ** In the current implementation, "tzset()" refuses to deal with files that 80 ** exceed any of the limits below. 81 */ 82 83 /* 84 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a 85 ** year's worth of solar time (corrected daily to the nearest second) or 86 ** 138 years of Pacific Presidential Election time 87 ** (where there are three time zone transitions every fourth year). 88 */ 89 #define TZ_MAX_TIMES 370 90 91 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 92 93 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 94 95 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 96 97 #define SECSPERMIN 60 98 #define MINSPERHOUR 60 99 #define HOURSPERDAY 24 100 #define DAYSPERWEEK 7 101 #define DAYSPERNYEAR 365 102 #define DAYSPERLYEAR 366 103 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 104 #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY) 105 #define MONSPERYEAR 12 106 107 #define TM_SUNDAY 0 108 #define TM_MONDAY 1 109 #define TM_TUESDAY 2 110 #define TM_WEDNESDAY 3 111 #define TM_THURSDAY 4 112 #define TM_FRIDAY 5 113 #define TM_SATURDAY 6 114 115 #define TM_JANUARY 0 116 #define TM_FEBRUARY 1 117 #define TM_MARCH 2 118 #define TM_APRIL 3 119 #define TM_MAY 4 120 #define TM_JUNE 5 121 #define TM_JULY 6 122 #define TM_AUGUST 7 123 #define TM_SEPTEMBER 8 124 #define TM_OCTOBER 9 125 #define TM_NOVEMBER 10 126 #define TM_DECEMBER 11 127 128 #define TM_YEAR_BASE 1900 129 130 #define EPOCH_YEAR 1970 131 #define EPOCH_WDAY TM_THURSDAY 132 133 /* 134 ** Accurate only for the past couple of centuries; 135 ** that will probably do. 136 */ 137 138 #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0) 139 140 /* 141 ** Use of the underscored variants may cause problems if you move your code to 142 ** certain System-V-based systems; for maximum portability, use the 143 ** underscore-free variants. The underscored variants are provided for 144 ** backward compatibility only; they may disappear from future versions of 145 ** this file. 146 */ 147 148 #define SECS_PER_MIN SECSPERMIN 149 #define MINS_PER_HOUR MINSPERHOUR 150 #define HOURS_PER_DAY HOURSPERDAY 151 #define DAYS_PER_WEEK DAYSPERWEEK 152 #define DAYS_PER_NYEAR DAYSPERNYEAR 153 #define DAYS_PER_LYEAR DAYSPERLYEAR 154 #define SECS_PER_HOUR SECSPERHOUR 155 #define SECS_PER_DAY SECSPERDAY 156 #define MONS_PER_YEAR MONSPERYEAR 157 158 #endif /* !defined TZFILE_H */ 159