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