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Annotation of 43BSDTahoe/include/tzfile.h, revision 1.1.1.1

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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