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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * from Arthur Olson's 6.1 28 */ 29 30 #ifndef _SYS_TZFILE_H 31 #define _SYS_TZFILE_H 32 33 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * Information about time zone files. 41 */ 42 43 #define TZDIR "/usr/share/lib/zoneinfo" /* Time zone object file directory */ 44 45 #define TZDEFAULT (getenv("TZ")) 46 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 TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 96 97 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 98 99 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 100 101 #define SECSPERMIN 60 102 #define MINSPERHOUR 60 103 #define HOURSPERDAY 24 104 #define DAYSPERWEEK 7 105 #define DAYSPERNYEAR 365 106 #define DAYSPERLYEAR 366 107 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 108 #define SECSPERDAY ((long)SECSPERHOUR * HOURSPERDAY) 109 #define MONSPERYEAR 12 110 111 #define TM_SUNDAY 0 112 #define TM_MONDAY 1 113 #define TM_TUESDAY 2 114 #define TM_WEDNESDAY 3 115 #define TM_THURSDAY 4 116 #define TM_FRIDAY 5 117 #define TM_SATURDAY 6 118 119 #define TM_JANUARY 0 120 #define TM_FEBRUARY 1 121 #define TM_MARCH 2 122 #define TM_APRIL 3 123 #define TM_MAY 4 124 #define TM_JUNE 5 125 #define TM_JULY 6 126 #define TM_AUGUST 7 127 #define TM_SEPTEMBER 8 128 #define TM_OCTOBER 9 129 #define TM_NOVEMBER 10 130 #define TM_DECEMBER 11 131 132 #define TM_YEAR_BASE 1900 133 134 #define EPOCH_YEAR 1970 135 #define EPOCH_WDAY TM_THURSDAY 136 137 /* 138 * Accurate only for the past couple of centuries; 139 * that will probably do. 140 */ 141 142 #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0) 143 144 /* 145 * Use of the underscored variants may cause problems if you move your code to 146 * certain System-V-based systems; for maximum portability, use the 147 * underscore-free variants. The underscored variants are provided for 148 * backward compatibility only; they may disappear from future versions of 149 * this file. 150 */ 151 152 #define SECS_PER_MIN SECSPERMIN 153 #define MINS_PER_HOUR MINSPERHOUR 154 #define HOURS_PER_DAY HOURSPERDAY 155 #define DAYS_PER_WEEK DAYSPERWEEK 156 #define DAYS_PER_NYEAR DAYSPERNYEAR 157 #define DAYS_PER_LYEAR DAYSPERLYEAR 158 #define SECS_PER_HOUR SECSPERHOUR 159 #define SECS_PER_DAY SECSPERDAY 160 #define MONS_PER_YEAR MONSPERYEAR 161 162 #ifdef __cplusplus 163 } 164 #endif 165 166 #endif /* _SYS_TZFILE_H */ 167