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 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 /* 38 * Information about time zone files. 39 */ 40 41 #define TZDIR "/usr/share/lib/zoneinfo" /* Time zone object file directory */ 42 43 #define TZDEFAULT (getenv("TZ")) 44 45 #define TZDEFRULES "posixrules" 46 47 /* 48 * Each file begins with. . . 49 */ 50 51 struct tzhead { 52 char tzh_reserved[24]; /* reserved for future use */ 53 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 54 char tzh_leapcnt[4]; /* coded number of leap seconds */ 55 char tzh_timecnt[4]; /* coded number of transition times */ 56 char tzh_typecnt[4]; /* coded number of local time types */ 57 char tzh_charcnt[4]; /* coded number of abbr. chars */ 58 }; 59 60 /* 61 * . . .followed by. . . 62 * 63 * tzh_timecnt (char [4])s coded transition times a la time(2) 64 * tzh_timecnt (unsigned char)s types of local time starting at above 65 * tzh_typecnt repetitions of 66 * one (char [4]) coded GMT offset in seconds 67 * one (unsigned char) used to set tm_isdst 68 * one (unsigned char) that's an abbreviation list index 69 * tzh_charcnt (char)s '\0'-terminated zone abbreviations 70 * tzh_leapcnt repetitions of 71 * one (char [4]) coded leap second transition times 72 * one (char [4]) total correction after above 73 * tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 74 * time is standard time, if FALSE, 75 * transition time is wall clock time 76 * if absent, transition times are 77 * assumed to be wall clock time 78 */ 79 80 /* 81 * In the current implementation, "tzset()" refuses to deal with files that 82 * exceed any of the limits below. 83 */ 84 85 /* 86 * The TZ_MAX_TIMES value below is enough to handle a bit more than a 87 * year's worth of solar time (corrected daily to the nearest second) or 88 * 138 years of Pacific Presidential Election time 89 * (where there are three time zone transitions every fourth year). 90 */ 91 #define TZ_MAX_TIMES 370 92 93 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 94 95 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 96 97 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 98 99 #define SECSPERMIN 60 100 #define MINSPERHOUR 60 101 #define HOURSPERDAY 24 102 #define DAYSPERWEEK 7 103 #define DAYSPERNYEAR 365 104 #define DAYSPERLYEAR 366 105 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 106 #define SECSPERDAY ((long)SECSPERHOUR * HOURSPERDAY) 107 #define MONSPERYEAR 12 108 109 #define TM_SUNDAY 0 110 #define TM_MONDAY 1 111 #define TM_TUESDAY 2 112 #define TM_WEDNESDAY 3 113 #define TM_THURSDAY 4 114 #define TM_FRIDAY 5 115 #define TM_SATURDAY 6 116 117 #define TM_JANUARY 0 118 #define TM_FEBRUARY 1 119 #define TM_MARCH 2 120 #define TM_APRIL 3 121 #define TM_MAY 4 122 #define TM_JUNE 5 123 #define TM_JULY 6 124 #define TM_AUGUST 7 125 #define TM_SEPTEMBER 8 126 #define TM_OCTOBER 9 127 #define TM_NOVEMBER 10 128 #define TM_DECEMBER 11 129 130 #define TM_YEAR_BASE 1900 131 132 #define EPOCH_YEAR 1970 133 #define EPOCH_WDAY TM_THURSDAY 134 135 /* 136 * Accurate only for the past couple of centuries; 137 * that will probably do. 138 */ 139 140 #define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0) 141 142 /* 143 * Use of the underscored variants may cause problems if you move your code to 144 * certain System-V-based systems; for maximum portability, use the 145 * underscore-free variants. The underscored variants are provided for 146 * backward compatibility only; they may disappear from future versions of 147 * this file. 148 */ 149 150 #define SECS_PER_MIN SECSPERMIN 151 #define MINS_PER_HOUR MINSPERHOUR 152 #define HOURS_PER_DAY HOURSPERDAY 153 #define DAYS_PER_WEEK DAYSPERWEEK 154 #define DAYS_PER_NYEAR DAYSPERNYEAR 155 #define DAYS_PER_LYEAR DAYSPERLYEAR 156 #define SECS_PER_HOUR SECSPERHOUR 157 #define SECS_PER_DAY SECSPERDAY 158 #define MONS_PER_YEAR MONSPERYEAR 159 160 #ifdef __cplusplus 161 } 162 #endif 163 164 #endif /* _SYS_TZFILE_H */ 165