zic.tproj/tzfile.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*      $OpenBSD: tzfile.h,v 1.4 1997/01/14 03:16:52 millert Exp $      */
  26
  27 #ifndef TZFILE_H
  28
  29 #define TZFILE_H
  30
  31 /*
  32 ** This file is in the public domain, so clarified as of
  33 ** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
  34 */
  35
  36 /*
  37 ** This header is for use ONLY with the time conversion code.
  38 ** There is no guarantee that it will remain unchanged,
  39 ** or that it will remain at all.
  40 ** Do NOT copy it to any system include directory.
  41 ** Thank you!
  42 */
  43
  44 /*
  45 ** ID
  46 */
  47
  48 #if 0
  49 #ifndef lint
  50 #ifndef NOID
  51 static char     tzfilehid[] = "@(#)tzfile.h     7.9";
  52 #endif /* !defined NOID */
  53 #endif /* !defined lint */
  54 #endif
  55
  56 /*
  57 ** Information about time zone files.
  58 */
  59
  60 #ifndef TZDIR
  61 #define TZDIR   "/usr/share/zoneinfo" /* Time zone object file directory */
  62 #endif /* !defined TZDIR */
  63
  64 #ifndef TZDEFAULT
  65 #define TZDEFAULT       "/etc/localtime"
  66 #endif /* !defined TZDEFAULT */
  67
  68 #ifndef TZDEFRULES
  69 #define TZDEFRULES      "posixrules"
  70 #endif /* !defined TZDEFRULES */
  71
  72 /*
  73 ** Each file begins with. . .
  74 */
  75
  76 struct tzhead {
  77         char    tzh_reserved[20];       /* reserved for future use */
  78         char    tzh_ttisgmtcnt[4];      /* coded number of trans. time flags */
  79         char    tzh_ttisstdcnt[4];      /* coded number of trans. time flags */
  80         char    tzh_leapcnt[4];         /* coded number of leap seconds */
  81         char    tzh_timecnt[4];         /* coded number of transition times */
  82         char    tzh_typecnt[4];         /* coded number of local time types */
  83         char    tzh_charcnt[4];         /* coded number of abbr. chars */
  84 };
  85
  86 /*
  87 ** . . .followed by. . .
  88 **
  89 **      tzh_timecnt (char [4])s         coded transition times a la time(2)
  90 **      tzh_timecnt (unsigned char)s    types of local time starting at above
  91 **      tzh_typecnt repetitions of
  92 **              one (char [4])          coded GMT offset in seconds
  93 **              one (unsigned char)     used to set tm_isdst
  94 **              one (unsigned char)     that's an abbreviation list index
  95 **      tzh_charcnt (char)s             '\0'-terminated zone abbreviations
  96 **      tzh_leapcnt repetitions of
  97 **              one (char [4])          coded leap second transition times
  98 **              one (char [4])          total correction after above
  99 **      tzh_ttisstdcnt (char)s          indexed by type; if TRUE, transition
 100 **                                      time is standard time, if FALSE,
 101 **                                      transition time is wall clock time
 102 **                                      if absent, transition times are
 103 **                                      assumed to be wall clock time
 104 **      tzh_ttisgmtcnt (char)s          indexed by type; if TRUE, transition
 105 **                                      time is GMT, if FALSE,
 106 **                                      transition time is local time
 107 **                                      if absent, transition times are
 108 **                                      assumed to be local time
 109 */
 110
 111 /*
 112 ** In the current implementation, "tzset()" refuses to deal with files that
 113 ** exceed any of the limits below.
 114 */
 115
 116 #ifndef TZ_MAX_TIMES
 117 /*
 118 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
 119 ** year's worth of solar time (corrected daily to the nearest second) or
 120 ** 138 years of Pacific Presidential Election time
 121 ** (where there are three time zone transitions every fourth year).
 122 */
 123 #define TZ_MAX_TIMES    370
 124 #endif /* !defined TZ_MAX_TIMES */
 125
 126 #ifndef TZ_MAX_TYPES
 127 #ifndef NOSOLAR
 128 #define TZ_MAX_TYPES    256 /* Limited by what (unsigned char)'s can hold */
 129 #endif /* !defined NOSOLAR */
 130 #ifdef NOSOLAR
 131 /*
 132 ** Must be at least 14 for Europe/Riga as of Jan 12 1995,
 133 ** as noted by Earl Chew <earl@hpato.aus.hp.com>.
 134 */
 135 #define TZ_MAX_TYPES    20      /* Maximum number of local time types */
 136 #endif /* !defined NOSOLAR */
 137 #endif /* !defined TZ_MAX_TYPES */
 138
 139 #ifndef TZ_MAX_CHARS
 140 #define TZ_MAX_CHARS    50      /* Maximum number of abbreviation characters */
 141                                 /* (limited by what unsigned chars can hold) */
 142 #endif /* !defined TZ_MAX_CHARS */
 143
 144 #ifndef TZ_MAX_LEAPS
 145 #define TZ_MAX_LEAPS    50      /* Maximum number of leap second corrections */
 146 #endif /* !defined TZ_MAX_LEAPS */
 147
 148 #define SECSPERMIN      60
 149 #define MINSPERHOUR     60
 150 #define HOURSPERDAY     24
 151 #define DAYSPERWEEK     7
 152 #define DAYSPERNYEAR    365
 153 #define DAYSPERLYEAR    366
 154 #define SECSPERHOUR     (SECSPERMIN * MINSPERHOUR)
 155 #define SECSPERDAY      ((long) SECSPERHOUR * HOURSPERDAY)
 156 #define MONSPERYEAR     12
 157
 158 #define TM_SUNDAY       0
 159 #define TM_MONDAY       1
 160 #define TM_TUESDAY      2
 161 #define TM_WEDNESDAY    3
 162 #define TM_THURSDAY     4
 163 #define TM_FRIDAY       5
 164 #define TM_SATURDAY     6
 165
 166 #define TM_JANUARY      0
 167 #define TM_FEBRUARY     1
 168 #define TM_MARCH        2
 169 #define TM_APRIL        3
 170 #define TM_MAY          4
 171 #define TM_JUNE         5
 172 #define TM_JULY         6
 173 #define TM_AUGUST       7
 174 #define TM_SEPTEMBER    8
 175 #define TM_OCTOBER      9
 176 #define TM_NOVEMBER     10
 177 #define TM_DECEMBER     11
 178
 179 #define TM_YEAR_BASE    1900
 180
 181 #define EPOCH_YEAR      1970
 182 #define EPOCH_WDAY      TM_THURSDAY
 183
 184 /*
 185 ** Accurate only for the past couple of centuries;
 186 ** that will probably do.
 187 */
 188
 189 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
 190
 191 #ifndef USG
 192
 193 /*
 194 ** Use of the underscored variants may cause problems if you move your code to
 195 ** certain System-V-based systems; for maximum portability, use the
 196 ** underscore-free variants.  The underscored variants are provided for
 197 ** backward compatibility only; they may disappear from future versions of
 198 ** this file.
 199 */
 200
 201 #define SECS_PER_MIN    SECSPERMIN
 202 #define MINS_PER_HOUR   MINSPERHOUR
 203 #define HOURS_PER_DAY   HOURSPERDAY
 204 #define DAYS_PER_WEEK   DAYSPERWEEK
 205 #define DAYS_PER_NYEAR  DAYSPERNYEAR
 206 #define DAYS_PER_LYEAR  DAYSPERLYEAR
 207 #define SECS_PER_HOUR   SECSPERHOUR
 208 #define SECS_PER_DAY    SECSPERDAY
 209 #define MONS_PER_YEAR   MONSPERYEAR
 210
 211 #endif /* !defined USG */
 212
 213 #endif /* !defined TZFILE_H */