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Annotation of 43BSDTahoe/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 Olson.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted
        !             9:  * provided that the above copyright notice and this paragraph are
        !            10:  * duplicated in all such forms and that any documentation,
        !            11:  * advertising materials, and other materials related to such
        !            12:  * distribution and use acknowledge that the software was developed
        !            13:  * by the University of California, Berkeley.  The name of the
        !            14:  * University may not be used to endorse or promote products derived
        !            15:  * from this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            17:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            18:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)tzfile.h    5.3 (Berkeley) 7/6/88
        !            21:  */
        !            22: 
        !            23: /*
        !            24: ** Information about time zone files.
        !            25: */
        !            26: 
        !            27: #define        TZDIR           "/etc/zoneinfo" /* Time zone object file directory */
        !            28: #define        TZDEFAULT       "localtime"
        !            29: 
        !            30: /*
        !            31: ** Each file begins with. . .
        !            32: */
        !            33: 
        !            34: struct tzhead {
        !            35:        char    tzh_reserved[32];       /* reserved for future use */
        !            36:        char    tzh_timecnt[4];         /* coded number of transition times */
        !            37:        char    tzh_typecnt[4];         /* coded number of local time types */
        !            38:        char    tzh_charcnt[4];         /* coded number of abbr. chars */
        !            39: };
        !            40: 
        !            41: /*
        !            42: ** . . .followed by. . .
        !            43: **
        !            44: **     tzh_timecnt (char [4])s         coded transition times a la time(2)
        !            45: **     tzh_timecnt (unsigned char)s    types of local time starting at above
        !            46: **     tzh_typecnt repetitions of
        !            47: **             one (char [4])          coded GMT offset in seconds
        !            48: **             one (unsigned char)     used to set tm_isdt
        !            49: **             one (unsigned char)     that's an abbreviation list index
        !            50: **     tzh_charcnt (char)s             '\0'-terminated zone abbreviaton strings
        !            51: */
        !            52: 
        !            53: /*
        !            54: ** In the current implementation, "tzset()" refuses to deal with files that
        !            55: ** exceed any of the limits below.
        !            56: */
        !            57: 
        !            58: /*
        !            59: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
        !            60: ** year's worth of solar time (corrected daily to the nearest second) or
        !            61: ** 138 years of Pacific Presidential Election time
        !            62: ** (where there are three time zone transitions every fourth year).
        !            63: */
        !            64: #define        TZ_MAX_TIMES    370
        !            65: 
        !            66: #define        NOSOLAR                 /* We currently don't handle solar time */
        !            67: 
        !            68: #ifndef        NOSOLAR
        !            69: #define        TZ_MAX_TYPES    256     /* Limited by what (unsigned char)'s can hold */
        !            70: #else /* !NOSOLAR */
        !            71: #define        TZ_MAX_TYPES    10      /* Maximum number of local time types */
        !            72: #endif /* !NOSOLAR */
        !            73: 
        !            74: #define        TZ_MAX_CHARS    50      /* Maximum number of abbreviation characters */
        !            75: 
        !            76: #define        SECS_PER_MIN    60
        !            77: #define        MINS_PER_HOUR   60
        !            78: #define        HOURS_PER_DAY   24
        !            79: #define        DAYS_PER_WEEK   7
        !            80: #define        DAYS_PER_NYEAR  365
        !            81: #define        DAYS_PER_LYEAR  366
        !            82: #define        SECS_PER_HOUR   (SECS_PER_MIN * MINS_PER_HOUR)
        !            83: #define        SECS_PER_DAY    ((long) SECS_PER_HOUR * HOURS_PER_DAY)
        !            84: #define        MONS_PER_YEAR   12
        !            85: 
        !            86: #define        TM_SUNDAY       0
        !            87: #define        TM_MONDAY       1
        !            88: #define        TM_TUESDAY      2
        !            89: #define        TM_WEDNESDAY    3
        !            90: #define        TM_THURSDAY     4
        !            91: #define        TM_FRIDAY       5
        !            92: #define        TM_SATURDAY     6
        !            93: 
        !            94: #define        TM_JANUARY      0
        !            95: #define        TM_FEBRUARY     1
        !            96: #define        TM_MARCH        2
        !            97: #define        TM_APRIL        3
        !            98: #define        TM_MAY          4
        !            99: #define        TM_JUNE         5
        !           100: #define        TM_JULY         6
        !           101: #define        TM_AUGUST       7
        !           102: #define        TM_SEPTEMBER    8
        !           103: #define        TM_OCTOBER      9
        !           104: #define        TM_NOVEMBER     10
        !           105: #define        TM_DECEMBER     11
        !           106: #define        TM_SUNDAY       0
        !           107: 
        !           108: #define        TM_YEAR_BASE    1900
        !           109: 
        !           110: #define        EPOCH_YEAR      1970
        !           111: #define        EPOCH_WDAY      TM_THURSDAY
        !           112: 
        !           113: /*
        !           114: ** Accurate only for the past couple of centuries;
        !           115: ** that will probably do.
        !           116: */
        !           117: 
        !           118: #define        isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)

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