stdtime/FreeBSD/tzfile.h

   1 #ifndef TZFILE_H
   2 #define TZFILE_H
   3
   4
   5 /*
   6 ** This file is in the public domain, so clarified as of
   7 ** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
   8 **
   9 ** $FreeBSD: src/lib/libc/stdtime/tzfile.h,v 1.8 2002/03/22 23:42:05 obrien Exp $
  10 */
  11
  12 /*
  13 ** This header is for use ONLY with the time conversion code.
  14 ** There is no guarantee that it will remain unchanged,
  15 ** or that it will remain at all.
  16 ** Do NOT copy it to any system include directory.
  17 ** Thank you!
  18 */
  19
  20 /*
  21 ** ID
  22 */
  23
  24 #ifndef lint
  25 #ifndef NOID
  26 /*
  27 static char     tzfilehid[] = "@(#)tzfile.h     7.14";
  28 */
  29 #endif /* !defined NOID */
  30 #endif /* !defined lint */
  31
  32 /*
  33 ** Information about time zone files.
  34 */
  35
  36 #ifndef TZDIR
  37 #define TZDIR   "/usr/share/zoneinfo" /* Time zone object file directory */
  38 #endif /* !defined TZDIR */
  39
  40 #ifndef TZDEFAULT
  41 #define TZDEFAULT       "/etc/localtime"
  42 #endif /* !defined TZDEFAULT */
  43
  44 #ifndef TZDEFRULES
  45 #define TZDEFRULES      "posixrules"
  46 #endif /* !defined TZDEFRULES */
  47
  48 /*
  49 ** Each file begins with. . .
  50 */
  51
  52 #define TZ_MAGIC        "TZif"
  53
  54 struct tzhead {
  55         char    tzh_magic[4];           /* TZ_MAGIC */
  56         char    tzh_reserved[16];       /* reserved for future use */
  57         char    tzh_ttisgmtcnt[4];      /* coded number of trans. time flags */
  58         char    tzh_ttisstdcnt[4];      /* coded number of trans. time flags */
  59         char    tzh_leapcnt[4];         /* coded number of leap seconds */
  60         char    tzh_timecnt[4];         /* coded number of transition times */
  61         char    tzh_typecnt[4];         /* coded number of local time types */
  62         char    tzh_charcnt[4];         /* coded number of abbr. chars */
  63 };
  64
  65 /*
  66 ** . . .followed by. . .
  67 **
  68 **      tzh_timecnt (char [4])s         coded transition times a la time(2)
  69 **      tzh_timecnt (unsigned char)s    types of local time starting at above
  70 **      tzh_typecnt repetitions of
  71 **              one (char [4])          coded UTC offset in seconds
  72 **              one (unsigned char)     used to set tm_isdst
  73 **              one (unsigned char)     that's an abbreviation list index
  74 **      tzh_charcnt (char)s             '\0'-terminated zone abbreviations
  75 **      tzh_leapcnt repetitions of
  76 **              one (char [4])          coded leap second transition times
  77 **              one (char [4])          total correction after above
  78 **      tzh_ttisstdcnt (char)s          indexed by type; if TRUE, transition
  79 **                                      time is standard time, if FALSE,
  80 **                                      transition time is wall clock time
  81 **                                      if absent, transition times are
  82 **                                      assumed to be wall clock time
  83 **      tzh_ttisgmtcnt (char)s          indexed by type; if TRUE, transition
  84 **                                      time is UTC, if FALSE,
  85 **                                      transition time is local time
  86 **                                      if absent, transition times are
  87 **                                      assumed to be local time
  88 */
  89
  90 /*
  91 ** In the current implementation, "tzset()" refuses to deal with files that
  92 ** exceed any of the limits below.
  93 */
  94
  95 #ifndef TZ_MAX_TIMES
  96 /*
  97 ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
  98 ** year's worth of solar time (corrected daily to the nearest second) or
  99 ** 138 years of Pacific Presidential Election time
 100 ** (where there are three time zone transitions every fourth year).
 101 */
 102 #define TZ_MAX_TIMES    370
 103 #endif /* !defined TZ_MAX_TIMES */
 104
 105 #ifndef TZ_MAX_TYPES
 106 #ifndef NOSOLAR
 107 #define TZ_MAX_TYPES    256 /* Limited by what (unsigned char)'s can hold */
 108 #endif /* !defined NOSOLAR */
 109 #ifdef NOSOLAR
 110 /*
 111 ** Must be at least 14 for Europe/Riga as of Jan 12 1995,
 112 ** as noted by Earl Chew <earl@hpato.aus.hp.com>.
 113 */
 114 #define TZ_MAX_TYPES    20      /* Maximum number of local time types */
 115 #endif /* !defined NOSOLAR */
 116 #endif /* !defined TZ_MAX_TYPES */
 117
 118 #ifndef TZ_MAX_CHARS
 119 #define TZ_MAX_CHARS    50      /* Maximum number of abbreviation characters */
 120                                 /* (limited by what unsigned chars can hold) */
 121 #endif /* !defined TZ_MAX_CHARS */
 122
 123 #ifndef TZ_MAX_LEAPS
 124 #define TZ_MAX_LEAPS    50      /* Maximum number of leap second corrections */
 125 #endif /* !defined TZ_MAX_LEAPS */
 126
 127 #define SECSPERMIN      60
 128 #define MINSPERHOUR     60
 129 #define HOURSPERDAY     24
 130 #define DAYSPERWEEK     7
 131 #define DAYSPERNYEAR    365
 132 #define DAYSPERLYEAR    366
 133 #define SECSPERHOUR     (SECSPERMIN * MINSPERHOUR)
 134 #define SECSPERDAY      ((long) SECSPERHOUR * HOURSPERDAY)
 135 #define MONSPERYEAR     12
 136
 137 #define TM_SUNDAY       0
 138 #define TM_MONDAY       1
 139 #define TM_TUESDAY      2
 140 #define TM_WEDNESDAY    3
 141 #define TM_THURSDAY     4
 142 #define TM_FRIDAY       5
 143 #define TM_SATURDAY     6
 144
 145 #define TM_JANUARY      0
 146 #define TM_FEBRUARY     1
 147 #define TM_MARCH        2
 148 #define TM_APRIL        3
 149 #define TM_MAY          4
 150 #define TM_JUNE         5
 151 #define TM_JULY         6
 152 #define TM_AUGUST       7
 153 #define TM_SEPTEMBER    8
 154 #define TM_OCTOBER      9
 155 #define TM_NOVEMBER     10
 156 #define TM_DECEMBER     11
 157
 158 #define TM_YEAR_BASE    1900
 159
 160 #define EPOCH_YEAR      1970
 161 #define EPOCH_WDAY      TM_THURSDAY
 162
 163 /*
 164 ** Accurate only for the past couple of centuries;
 165 ** that will probably do.
 166 */
 167
 168 #define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
 169
 170 #ifndef USG
 171
 172 /*
 173 ** Use of the underscored variants may cause problems if you move your code to
 174 ** certain System-V-based systems; for maximum portability, use the
 175 ** underscore-free variants.  The underscored variants are provided for
 176 ** backward compatibility only; they may disappear from future versions of
 177 ** this file.
 178 */
 179
 180 #define SECS_PER_MIN    SECSPERMIN
 181 #define MINS_PER_HOUR   MINSPERHOUR
 182 #define HOURS_PER_DAY   HOURSPERDAY
 183 #define DAYS_PER_WEEK   DAYSPERWEEK
 184 #define DAYS_PER_NYEAR  DAYSPERNYEAR
 185 #define DAYS_PER_LYEAR  DAYSPERLYEAR
 186 #define SECS_PER_HOUR   SECSPERHOUR
 187 #define SECS_PER_DAY    SECSPERDAY
 188 #define MONS_PER_YEAR   MONSPERYEAR
 189
 190 #endif /* !defined USG */
 191
 192 #endif /* !defined TZFILE_H */