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 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1988 AT&T */ 27 /* All Rights Reserved */ 28 29 #ifndef _TZFILE_H 30 #define _TZFILE_H 31 32 #pragma ident "%Z%%M% %I% %E% SMI" 33 34 /* 35 * A part of this file comes from public domain source, so 36 * clarified as of June 5, 1996 by Arthur David Olson 37 */ 38 39 #include <sys/types.h> 40 41 /* 42 * WARNING: 43 * The interfaces defined in this header file are for Sun private use only. 44 * The contents of this file are subject to change without notice for the 45 * future releases. 46 */ 47 48 /* For further information, see ctime(3C) and zic(1M) man pages. */ 49 50 /* 51 * This file is in the public domain, so clarified as of 52 * 1996-06-05 by Arthur David Olson. 53 */ 54 55 /* 56 * This header is for use ONLY with the time conversion code. 57 * There is no guarantee that it will remain unchanged, 58 * or that it will remain at all. 59 * Do NOT copy it to any system include directory. 60 * Thank you! 61 */ 62 63 /* static char tzfilehid[] = "@(#)tzfile.h 7.18"; */ 64 65 /* 66 * Note: Despite warnings from the authors of this code, Solaris has 67 * placed this header file in the system include directory. This was 68 * probably done in order to build both zic and zdump which are in 69 * separate source directories, but both use this file. 70 */ 71 72 #ifdef __cplusplus 73 extern "C" { 74 #endif 75 76 /* 77 * Information about time zone files. 78 */ 79 80 #ifndef TZDIR 81 #define TZDIR "/usr/share/lib/zoneinfo" /* Time zone object file directory */ 82 #endif /* !defined TZDIR */ 83 84 #ifndef TZDEFAULT 85 #define TZDEFAULT "localtime" 86 #endif /* !defined TZDEFAULT */ 87 88 #ifndef TZDEFRULES 89 #define TZDEFRULES "posixrules" 90 #endif /* !defined TZDEFRULES */ 91 92 /* 93 * Each file begins with. . . 94 */ 95 96 #define TZ_MAGIC "TZif" 97 98 struct tzhead { 99 char tzh_magic[4]; /* TZ_MAGIC */ 100 char tzh_reserved[16]; /* reserved for future use */ 101 char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */ 102 char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ 103 char tzh_leapcnt[4]; /* coded number of leap seconds */ 104 char tzh_timecnt[4]; /* coded number of transition times */ 105 char tzh_typecnt[4]; /* coded number of local time types */ 106 char tzh_charcnt[4]; /* coded number of abbr. chars */ 107 }; 108 109 /* 110 * . . .followed by. . . 111 * 112 * tzh_timecnt (char [4])s coded transition times a la time(2) 113 * tzh_timecnt (unsigned char)s types of local time starting at above 114 * tzh_typecnt repetitions of 115 * one (char [4]) coded UTC offset in seconds 116 * one (unsigned char) used to set tm_isdst 117 * one (unsigned char) that's an abbreviation list index 118 * tzh_charcnt (char)s '\0'-terminated zone abbreviations 119 * tzh_leapcnt repetitions of 120 * one (char [4]) coded leap second transition times 121 * one (char [4]) total correction after above 122 * tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition 123 * time is standard time, if FALSE, 124 * transition time is wall clock time 125 * if absent, transition times are 126 * assumed to be wall clock time 127 * tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition 128 * time is UTC, if FALSE, 129 * transition time is local time 130 * if absent, transition times are 131 * assumed to be local time 132 */ 133 134 /* 135 * In the current implementation, "tzset()" refuses to deal with files that 136 * exceed any of the limits below. 137 */ 138 139 #ifndef TZ_MAX_TIMES 140 /* 141 * The TZ_MAX_TIMES value below is enough to handle a bit more than a 142 * year's worth of solar time (corrected daily to the nearest second) or 143 * 138 years of Pacific Presidential Election time 144 * (where there are three time zone transitions every fourth year). 145 */ 146 #define TZ_MAX_TIMES 370 147 #endif /* !defined TZ_MAX_TIMES */ 148 149 #ifndef TZ_MAX_TYPES 150 #ifndef NOSOLAR 151 #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ 152 #endif /* !defined NOSOLAR */ 153 #ifdef NOSOLAR 154 /* 155 * Must be at least 14 for Europe/Riga as of Jan 12 1995, 156 * as noted by Earl Chew. 157 */ 158 #define TZ_MAX_TYPES 20 /* Maximum number of local time types */ 159 #endif /* !defined NOSOLAR */ 160 #endif /* !defined TZ_MAX_TYPES */ 161 162 #ifndef TZ_MAX_CHARS 163 #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ 164 /* (limited by what unsigned chars can hold) */ 165 #endif /* !defined TZ_MAX_CHARS */ 166 167 #ifndef TZ_MAX_LEAPS 168 #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ 169 #endif /* !defined TZ_MAX_LEAPS */ 170 171 #define SECSPERMIN 60 172 #define MINSPERHOUR 60 173 #define HOURSPERDAY 24 174 #define DAYSPERWEEK 7 175 #define DAYSPERNYEAR 365 176 #define DAYSPERLYEAR 366 177 #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR) 178 #define SECSPERDAY ((time_t)SECSPERHOUR * HOURSPERDAY) 179 #define MONSPERYEAR 12 180 181 #define TM_SUNDAY 0 182 #define TM_MONDAY 1 183 #define TM_TUESDAY 2 184 #define TM_WEDNESDAY 3 185 #define TM_THURSDAY 4 186 #define TM_FRIDAY 5 187 #define TM_SATURDAY 6 188 189 #define TM_JANUARY 0 190 #define TM_FEBRUARY 1 191 #define TM_MARCH 2 192 #define TM_APRIL 3 193 #define TM_MAY 4 194 #define TM_JUNE 5 195 #define TM_JULY 6 196 #define TM_AUGUST 7 197 #define TM_SEPTEMBER 8 198 #define TM_OCTOBER 9 199 #define TM_NOVEMBER 10 200 #define TM_DECEMBER 11 201 202 #define TM_YEAR_BASE 1900 203 204 #define EPOCH_YEAR 1970 205 #define EPOCH_WDAY TM_THURSDAY 206 207 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0)) 208 209 #ifndef USG 210 211 /* 212 * Use of the underscored variants may cause problems if you move your code to 213 * certain System-V-based systems; for maximum portability, use the 214 * underscore-free variants. The underscored variants are provided for 215 * backward compatibility only; they may disappear from future versions of 216 * this file. 217 */ 218 219 #define SECS_PER_MIN SECSPERMIN 220 #define MINS_PER_HOUR MINSPERHOUR 221 #define HOURS_PER_DAY HOURSPERDAY 222 #define DAYS_PER_WEEK DAYSPERWEEK 223 #define DAYS_PER_NYEAR DAYSPERNYEAR 224 #define DAYS_PER_LYEAR DAYSPERLYEAR 225 #define SECS_PER_HOUR SECSPERHOUR 226 #define SECS_PER_DAY SECSPERDAY 227 #define MONS_PER_YEAR MONSPERYEAR 228 229 #endif /* !defined USG */ 230 231 /* 232 * Since everything in isleap is modulo 400 (or a factor of 400), we know that 233 * isleap(y) == isleap(y % 400) 234 * and so 235 * isleap(a + b) == isleap((a + b) % 400) 236 * or 237 * isleap(a + b) == isleap(a % 400 + b % 400) 238 * This is true even if % means modulo rather than Fortran remainder 239 * (which is allowed by C89 but not C99). 240 * We use this to avoid addition overflow problems. 241 */ 242 243 #define isleap_sum(a, b) isleap((a) % 400 + (b) % 400) 244 245 #ifdef __cplusplus 246 } 247 #endif 248 249 #endif /* _TZFILE_H */ 250