zic.tproj/tzfile.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.0 (the 'License').  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License."
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*      $OpenBSD: tzfile.h,v 1.4 1997/01/14 03:16:52 millert Exp $      */
  25
  26 #ifndef TZFILE_H
  27
  28 #define TZFILE_H
  29
  30 /*
  31 ** This file is in the public domain, so clarified as of
  32 ** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
  33 */
  34
  35 /*
  36 ** This header is for use ONLY with the time conversion code.
  37 ** There is no guarantee that it will remain unchanged,
  38 ** or that it will remain at all.
  39 ** Do NOT copy it to any system include directory.
  40 ** Thank you!
  41 */
  42
  43 /*
  44 ** ID
  45 */
  46
  47 #if 0
  48 #ifndef lint
  49 #ifndef NOID
  50 static char     tzfilehid[] = "@(#)tzfile.h     7.9";
  51 #endif /* !defined NOID */
  52 #endif /* !defined lint */
  53 #endif
  54
  55 /*
  56 ** Information about time zone files.
  57 */
  58
  59 #ifndef TZDIR
  60 #define TZDIR   "/usr/share/zoneinfo" /* Time zone object file directory */
  61 #endif /* !defined TZDIR */
  62
  63 #ifndef TZDEFAULT
  64 #define TZDEFAULT       "/etc/localtime"
  65 #endif /* !defined TZDEFAULT */
  66
  67 #ifndef TZDEFRULES
  68 #define TZDEFRULES      "posixrules"
  69 #endif /* !defined TZDEFRULES */
  70
  71 /*
  72 ** Each file begins with. . .
  73 */
  74
  75 struct tzhead {
  76         char    tzh_reserved[20];       /* reserved for future use */
  77         char    tzh_ttisgmtcnt[4];      /* coded number of trans. time flags */
  78         char    tzh_ttisstdcnt[4];      /* coded number of trans. time flags */
  79         char    tzh_leapcnt[4];         /* coded number of leap seconds */
  80         char    tzh_timecnt[4];         /* coded number of transition times */
  81         char    tzh_typecnt[4];         /* coded number of local time types */
  82         char    tzh_charcnt[4];         /* coded number of abbr. chars */
  83 };
  84
  85 /*
  86 ** . . .followed by. . .
  87 **
  88 **      tzh_timecnt (char [4])s         coded transition times a la time(2)
  89 **      tzh_timecnt (unsigned char)s    types of local time starting at above
  90 **      tzh_typecnt repetitions of
  91 **              one (char [4])          coded GMT offset in seconds
  92 **              one (unsigned char)     used to set tm_isdst
  93 **              one (unsigned char)     that's an abbreviation list index
  94 **      tzh_charcnt (char)s             '\0'-terminated zone abbreviations
  95 **      tzh_leapcnt repetitions of
  96 **              one (char [4])          coded leap second transition times
  97 **              one (char [4])          total correction after above
  98 **      tzh_ttisstdcnt (char)s          indexed by type; if TRUE, transition
  99 **                                      time is standard time, if FALSE,
 100 **                                      transition time is wall clock time
 101 **                                      if absent, transition times are
 102 **                                      assumed to be wall clock time
 103 **      tzh_ttisgmtcnt (char)s          indexed by type; if TRUE, transition
 104 **                                      time is GMT, if FALSE,
 105 **                                      transition time is local time
 106 **                                      if absent, transition times are
 107 **                                      assumed to be local time
 108 */
 109
 110 /*
 111 ** In the current implementation, "tzset()" refuses to deal with files that
 112 ** exceed any of the limits below.
 113 */
 114
 115 #ifndef TZ_MAX_TIMES
 116 /*
 117 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
 118 ** year's worth of solar time (corrected daily to the nearest second) or
 119 ** 138 years of Pacific Presidential Election time
 120 ** (where there are three time zone transitions every fourth year).
 121 */
 122 #define TZ_MAX_TIMES    370
 123 #endif /* !defined TZ_MAX_TIMES */
 124
 125 #ifndef TZ_MAX_TYPES
 126 #ifndef NOSOLAR
 127 #define TZ_MAX_TYPES    256 /* Limited by what (unsigned char)'s can hold */
 128 #endif /* !defined NOSOLAR */
 129 #ifdef NOSOLAR
 130 /*
 131 ** Must be at least 14 for Europe/Riga as of Jan 12 1995,
 132 ** as noted by Earl Chew <earl@hpato.aus.hp.com>.
 133 */
 134 #define TZ_MAX_TYPES    20      /* Maximum number of local time types */
 135 #endif /* !defined NOSOLAR */
 136 #endif /* !defined TZ_MAX_TYPES */
 137
 138 #ifndef TZ_MAX_CHARS
 139 #define TZ_MAX_CHARS    50      /* Maximum number of abbreviation characters */
 140                                 /* (limited by what unsigned chars can hold) */
 141 #endif /* !defined TZ_MAX_CHARS */
 142
 143 #ifndef TZ_MAX_LEAPS
 144 #define TZ_MAX_LEAPS    50      /* Maximum number of leap second corrections */
 145 #endif /* !defined TZ_MAX_LEAPS */
 146
 147 #define SECSPERMIN      60
 148 #define MINSPERHOUR     60
 149 #define HOURSPERDAY     24
 150 #define DAYSPERWEEK     7
 151 #define DAYSPERNYEAR    365
 152 #define DAYSPERLYEAR    366
 153 #define SECSPERHOUR     (SECSPERMIN * MINSPERHOUR)
 154 #define SECSPERDAY      ((long) SECSPERHOUR * HOURSPERDAY)
 155 #define MONSPERYEAR     12
 156
 157 #define TM_SUNDAY       0
 158 #define TM_MONDAY       1
 159 #define TM_TUESDAY      2
 160 #define TM_WEDNESDAY    3
 161 #define TM_THURSDAY     4
 162 #define TM_FRIDAY       5
 163 #define TM_SATURDAY     6
 164
 165 #define TM_JANUARY      0
 166 #define TM_FEBRUARY     1
 167 #define TM_MARCH        2
 168 #define TM_APRIL        3
 169 #define TM_MAY          4
 170 #define TM_JUNE         5
 171 #define TM_JULY         6
 172 #define TM_AUGUST       7
 173 #define TM_SEPTEMBER    8
 174 #define TM_OCTOBER      9
 175 #define TM_NOVEMBER     10
 176 #define TM_DECEMBER     11
 177
 178 #define TM_YEAR_BASE    1900
 179
 180 #define EPOCH_YEAR      1970
 181 #define EPOCH_WDAY      TM_THURSDAY
 182
 183 /*
 184 ** Accurate only for the past couple of centuries;
 185 ** that will probably do.
 186 */
 187
 188 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
 189
 190 #ifndef USG
 191
 192 /*
 193 ** Use of the underscored variants may cause problems if you move your code to
 194 ** certain System-V-based systems; for maximum portability, use the
 195 ** underscore-free variants.  The underscored variants are provided for
 196 ** backward compatibility only; they may disappear from future versions of
 197 ** this file.
 198 */
 199
 200 #define SECS_PER_MIN    SECSPERMIN
 201 #define MINS_PER_HOUR   MINSPERHOUR
 202 #define HOURS_PER_DAY   HOURSPERDAY
 203 #define DAYS_PER_WEEK   DAYSPERWEEK
 204 #define DAYS_PER_NYEAR  DAYSPERNYEAR
 205 #define DAYS_PER_LYEAR  DAYSPERLYEAR
 206 #define SECS_PER_HOUR   SECSPERHOUR
 207 #define SECS_PER_DAY    SECSPERDAY
 208 #define MONS_PER_YEAR   MONSPERYEAR
 209
 210 #endif /* !defined USG */
 211
 212 #endif /* !defined TZFILE_H */