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Annotation of 43BSDReno/include/tzfile.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Arthur David Olson of the National Cancer Institute.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  *
        !            22:  *     @(#)tzfile.h    5.9 (Berkeley) 6/11/90
        !            23:  */
        !            24: 
        !            25: /*
        !            26: ** Information about time zone files.
        !            27: */
        !            28: 
        !            29:                        /* Time zone object file directory */
        !            30: #define TZDIR          "/usr/share/zoneinfo"
        !            31: #define TZDEFAULT      "/etc/localtime"
        !            32: #define TZDEFRULES     "posixrules"
        !            33: 
        !            34: /*
        !            35: ** Each file begins with. . .
        !            36: */
        !            37: 
        !            38: struct tzhead {
        !            39:        char    tzh_reserved[24];       /* reserved for future use */
        !            40:        char    tzh_ttisstdcnt[4];      /* coded number of trans. time flags */
        !            41:        char    tzh_leapcnt[4];         /* coded number of leap seconds */
        !            42:        char    tzh_timecnt[4];         /* coded number of transition times */
        !            43:        char    tzh_typecnt[4];         /* coded number of local time types */
        !            44:        char    tzh_charcnt[4];         /* coded number of abbr. chars */
        !            45: };
        !            46: 
        !            47: /*
        !            48: ** . . .followed by. . .
        !            49: **
        !            50: **     tzh_timecnt (char [4])s         coded transition times a la time(2)
        !            51: **     tzh_timecnt (unsigned char)s    types of local time starting at above
        !            52: **     tzh_typecnt repetitions of
        !            53: **             one (char [4])          coded GMT offset in seconds
        !            54: **             one (unsigned char)     used to set tm_isdst
        !            55: **             one (unsigned char)     that's an abbreviation list index
        !            56: **     tzh_charcnt (char)s             '\0'-terminated zone abbreviations
        !            57: **     tzh_leapcnt repetitions of
        !            58: **             one (char [4])          coded leap second transition times
        !            59: **             one (char [4])          total correction after above
        !            60: **     tzh_ttisstdcnt (char)s          indexed by type; if TRUE, transition
        !            61: **                                     time is standard time, if FALSE,
        !            62: **                                     transition time is wall clock time
        !            63: **                                     if absent, transition times are
        !            64: **                                     assumed to be wall clock time
        !            65: */
        !            66: 
        !            67: /*
        !            68: ** In the current implementation, "tzset()" refuses to deal with files that
        !            69: ** exceed any of the limits below.
        !            70: */
        !            71: 
        !            72: /*
        !            73: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
        !            74: ** year's worth of solar time (corrected daily to the nearest second) or
        !            75: ** 138 years of Pacific Presidential Election time
        !            76: ** (where there are three time zone transitions every fourth year).
        !            77: */
        !            78: #define TZ_MAX_TIMES   370
        !            79: 
        !            80: #define NOSOLAR                        /* 4BSD doesn't currently handle solar time */
        !            81: 
        !            82: #ifndef NOSOLAR
        !            83: #define TZ_MAX_TYPES   256     /* Limited by what (unsigned char)'s can hold */
        !            84: #else
        !            85: #define TZ_MAX_TYPES   10      /* Maximum number of local time types */
        !            86: #endif
        !            87: 
        !            88: #define TZ_MAX_CHARS   50      /* Maximum number of abbreviation characters */
        !            89: 
        !            90: #define        TZ_MAX_LEAPS    50      /* Maximum number of leap second corrections */
        !            91: 
        !            92: #define SECSPERMIN     60
        !            93: #define MINSPERHOUR    60
        !            94: #define HOURSPERDAY    24
        !            95: #define DAYSPERWEEK    7
        !            96: #define DAYSPERNYEAR   365
        !            97: #define DAYSPERLYEAR   366
        !            98: #define SECSPERHOUR    (SECSPERMIN * MINSPERHOUR)
        !            99: #define SECSPERDAY     ((long) SECSPERHOUR * HOURSPERDAY)
        !           100: #define MONSPERYEAR    12
        !           101: 
        !           102: #define TM_SUNDAY      0
        !           103: #define TM_MONDAY      1
        !           104: #define TM_TUESDAY     2
        !           105: #define TM_WEDNESDAY   3
        !           106: #define TM_THURSDAY    4
        !           107: #define TM_FRIDAY      5
        !           108: #define TM_SATURDAY    6
        !           109: 
        !           110: #define TM_JANUARY     0
        !           111: #define TM_FEBRUARY    1
        !           112: #define TM_MARCH       2
        !           113: #define TM_APRIL       3
        !           114: #define TM_MAY         4
        !           115: #define TM_JUNE                5
        !           116: #define TM_JULY                6
        !           117: #define TM_AUGUST      7
        !           118: #define TM_SEPTEMBER   8
        !           119: #define TM_OCTOBER     9
        !           120: #define TM_NOVEMBER    10
        !           121: #define TM_DECEMBER    11
        !           122: 
        !           123: #define TM_YEAR_BASE   1900
        !           124: 
        !           125: #define EPOCH_YEAR     1970
        !           126: #define EPOCH_WDAY     TM_THURSDAY
        !           127: 
        !           128: /*
        !           129: ** Accurate only for the past couple of centuries;
        !           130: ** that will probably do.
        !           131: */
        !           132: 
        !           133: #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)

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