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 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #ifndef _TZFILE_H 31 #define _TZFILE_H 32 33 #pragma ident "%Z%%M% %I% %E% SMI" 34 35 /* 36 * A part of this file comes from public domain source, so 37 * clarified as of June 5, 1996 by Arthur David Olson 38 * (arthur_david_olson@nih.gov). 39 */ 40 41 #include <sys/types.h> 42 43 /* 44 * WARNING: 45 * The interfaces defined in this header file are for Sun private use only. 46 * The contents of this file are subject to change without notice for the 47 * future releases. 48 */ 49 50 /* For further information, see ctime(3C) and zic(1M) man pages. */ 51 52 /* 53 * This file is in the public domain, so clarified as of 54 * June 5, 1996 by Arthur David Olson (arthur_david_olson@nih.gov). 55 */ 56 57 /* 58 * This header is for use ONLY with the time conversion code. 59 * There is no guarantee that it will remain unchanged, 60 * or that it will remain at all. 61 * Do NOT copy it to any system include directory. 62 * Thank you! 63 */ 64 65 /* static char tzfilehid[] = "@(#)tzfile.h 7.17"; */ 66 67 /* 68 * Note: Despite warnings from the authors of this code, Solaris has 69 * placed this header file in the system include directory. This was 70 * probably done in order to build both zic and zdump which are in 71 * separate source directories, but both use this file. 72 */ 73 74 #ifdef __cplusplus 75 extern "C" { 76 #endif 77 78 /* 79 * Information about time zone files. 80 */ 81 82 #ifndef TZDIR 83 #define TZDIR "/usr/share/lib/zoneinfo" /* Time zone object file directory */ 84 #endif /* !defined TZDIR */ 85 86 #ifndef TZDEFAULT 87 #define TZDEFAULT "localtime" 88 #endif /* !defined TZDEFAULT */ 89 90 #ifndef TZDEFRULES 91 #define TZDEFRULES "posixrules" 92 #endif /* !defined TZDEFRULES */ 93 94 /* 95 * Each file begins with. . . 96 */ 97 98 #define TZ_MAGIC "TZif" 99 100 struct tzhead { 101 char tzh_magic[4]; /* TZ_MAGIC */ 102 char tzh_reserved[16]; /* reserved for future use */ 103 char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ 104 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 105 char tzh_leapcnt[4]; /* coded number of leap seconds */ 106 char tzh_timecnt[4]; /* coded number of transition times */ 107 char tzh_typecnt[4]; /* coded number of local time types */ 108 char tzh_charcnt[4]; /* coded number of abbr. chars */ 109 }; 110 111 /* 112 * . . .followed by. . . 113 * 114 * tzh_timecnt (char [4])s coded transition times a la time(2) 115 * tzh_timecnt (unsigned char)s types of local time starting at above 116 * tzh_typecnt repetitions of 117 * one (char [4]) coded UTC offset in seconds 118 * one (unsigned char) used to set tm_isdst 119 * one (unsigned char) that's an abbreviation list index 120 * tzh_charcnt (char)s '\0'-terminated zone abbreviations 121 * tzh_leapcnt repetitions of 122 * one (char [4]) coded leap second transition times 123 * one (char [4]) total correction after above 124 * tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 125 * time is standard time, if FALSE, 126 * transition time is wall clock time 127 * if absent, transition times are 128 * assumed to be wall clock time 129 * tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition 130 * time is UTC, if FALSE, 131 * transition time is local time 132 * if absent, transition times are 133 * assumed to be local time 134 */ 135 136 /* 137 * In the current implementation, "tzset()" refuses to deal with files that 138 * exceed any of the limits below. 139 */ 140 141 #ifndef TZ_MAX_TIMES 142 /* 143 * The TZ_MAX_TIMES value below is enough to handle a bit more than a 144 * year's worth of solar time (corrected daily to the nearest second) or 145 * 138 years of Pacific Presidential Election time 146 * (where there are three time zone transitions every fourth year). 147 */ 148 #define TZ_MAX_TIMES 370 149 #endif /* !defined TZ_MAX_TIMES */ 150 151 #ifndef TZ_MAX_TYPES 152 #ifndef NOSOLAR 153 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 154 #endif /* !defined NOSOLAR */ 155 #ifdef NOSOLAR 156 /* 157 * Must be at least 14 for Europe/Riga as of Jan 12 1995, 158 * as noted by Earl Chew <earl@hpato.aus.hp.com>. 159 */ 160 #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ 161 #endif /* !defined NOSOLAR */ 162 #endif /* !defined TZ_MAX_TYPES */ 163 164 #ifndef TZ_MAX_CHARS 165 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 166 /* (limited by what unsigned chars can hold) */ 167 #endif /* !defined TZ_MAX_CHARS */ 168 169 #ifndef TZ_MAX_LEAPS 170 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 171 #endif /* !defined TZ_MAX_LEAPS */ 172 173 #define SECSPERMIN 60 174 #define MINSPERHOUR 60 175 #define HOURSPERDAY 24 176 #define DAYSPERWEEK 7 177 #define DAYSPERNYEAR 365 178 #define DAYSPERLYEAR 366 179 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 180 #define SECSPERDAY ((time_t)SECSPERHOUR * HOURSPERDAY) 181 #define MONSPERYEAR 12 182 183 #define TM_SUNDAY 0 184 #define TM_MONDAY 1 185 #define TM_TUESDAY 2 186 #define TM_WEDNESDAY 3 187 #define TM_THURSDAY 4 188 #define TM_FRIDAY 5 189 #define TM_SATURDAY 6 190 191 #define TM_JANUARY 0 192 #define TM_FEBRUARY 1 193 #define TM_MARCH 2 194 #define TM_APRIL 3 195 #define TM_MAY 4 196 #define TM_JUNE 5 197 #define TM_JULY 6 198 #define TM_AUGUST 7 199 #define TM_SEPTEMBER 8 200 #define TM_OCTOBER 9 201 #define TM_NOVEMBER 10 202 #define TM_DECEMBER 11 203 204 #define TM_YEAR_BASE 1900 205 206 #define EPOCH_YEAR 1970 207 #define EPOCH_WDAY TM_THURSDAY 208 209 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) 210 211 #ifndef USG 212 213 /* 214 * Use of the underscored variants may cause problems if you move your code to 215 * certain System-V-based systems; for maximum portability, use the 216 * underscore-free variants. The underscored variants are provided for 217 * backward compatibility only; they may disappear from future versions of 218 * this file. 219 */ 220 221 #define SECS_PER_MIN SECSPERMIN 222 #define MINS_PER_HOUR MINSPERHOUR 223 #define HOURS_PER_DAY HOURSPERDAY 224 #define DAYS_PER_WEEK DAYSPERWEEK 225 #define DAYS_PER_NYEAR DAYSPERNYEAR 226 #define DAYS_PER_LYEAR DAYSPERLYEAR 227 #define SECS_PER_HOUR SECSPERHOUR 228 #define SECS_PER_DAY SECSPERDAY 229 #define MONS_PER_YEAR MONSPERYEAR 230 231 #endif /* !defined USG */ 232 233 /* 234 * Since everything in isleap is modulo 400 (or a factor of 400), we know that 235 * isleap(y) == isleap(y % 400) 236 * and so 237 * isleap(a + b) == isleap((a + b) % 400) 238 * or 239 * isleap(a + b) == isleap(a % 400 + b % 400) 240 * This is true even if % means modulo rather than Fortran remainder 241 * (which is allowed by C89 but not C99). 242 * We use this to avoid addition overflow problems. 243 */ 244 245 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) 246 247 #ifdef __cplusplus 248 } 249 #endif 250 251 #endif /* _TZFILE_H */ 252