Annotation of src/include/tzfile.h, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: tzfile.h,v 1.3 1994/10/26 00:56:37 cgd Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1988 Regents of the University of California.
! 5: * All rights reserved.
! 6: *
! 7: * This code is derived from software contributed to Berkeley by
! 8: * Arthur David Olson of the National Cancer Institute.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed by the University of
! 21: * California, Berkeley and its contributors.
! 22: * 4. Neither the name of the University nor the names of its contributors
! 23: * may be used to endorse or promote products derived from this software
! 24: * without specific prior written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 28: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 29: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 30: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 31: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 32: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 33: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 34: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 35: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 36: * SUCH DAMAGE.
! 37: *
! 38: * @(#)tzfile.h 5.10 (Berkeley) 4/3/91
! 39: */
! 40:
! 41: #ifndef _TZFILE_H_
! 42: #define _TZFILE_H_
! 43:
! 44: /*
! 45: * Information about time zone files.
! 46: */
! 47: /* Time zone object file directory */
! 48: #define TZDIR "/usr/share/zoneinfo"
! 49: #define TZDEFAULT "/etc/localtime"
! 50: #define TZDEFRULES "posixrules"
! 51:
! 52: /*
! 53: ** Each file begins with. . .
! 54: */
! 55:
! 56: struct tzhead {
! 57: char tzh_reserved[24]; /* reserved for future use */
! 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 GMT 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: */
! 84:
! 85: /*
! 86: ** In the current implementation, "tzset()" refuses to deal with files that
! 87: ** exceed any of the limits below.
! 88: */
! 89:
! 90: /*
! 91: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
! 92: ** year's worth of solar time (corrected daily to the nearest second) or
! 93: ** 138 years of Pacific Presidential Election time
! 94: ** (where there are three time zone transitions every fourth year).
! 95: */
! 96: #define TZ_MAX_TIMES 370
! 97:
! 98: #define NOSOLAR /* 4BSD doesn't currently handle solar time */
! 99:
! 100: #ifndef NOSOLAR
! 101: #define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
! 102: #else
! 103: #define TZ_MAX_TYPES 10 /* Maximum number of local time types */
! 104: #endif
! 105:
! 106: #define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
! 107:
! 108: #define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
! 109:
! 110: #define SECSPERMIN 60
! 111: #define MINSPERHOUR 60
! 112: #define HOURSPERDAY 24
! 113: #define DAYSPERWEEK 7
! 114: #define DAYSPERNYEAR 365
! 115: #define DAYSPERLYEAR 366
! 116: #define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
! 117: #define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
! 118: #define MONSPERYEAR 12
! 119:
! 120: #define TM_SUNDAY 0
! 121: #define TM_MONDAY 1
! 122: #define TM_TUESDAY 2
! 123: #define TM_WEDNESDAY 3
! 124: #define TM_THURSDAY 4
! 125: #define TM_FRIDAY 5
! 126: #define TM_SATURDAY 6
! 127:
! 128: #define TM_JANUARY 0
! 129: #define TM_FEBRUARY 1
! 130: #define TM_MARCH 2
! 131: #define TM_APRIL 3
! 132: #define TM_MAY 4
! 133: #define TM_JUNE 5
! 134: #define TM_JULY 6
! 135: #define TM_AUGUST 7
! 136: #define TM_SEPTEMBER 8
! 137: #define TM_OCTOBER 9
! 138: #define TM_NOVEMBER 10
! 139: #define TM_DECEMBER 11
! 140:
! 141: #define TM_YEAR_BASE 1900
! 142:
! 143: #define EPOCH_YEAR 1970
! 144: #define EPOCH_WDAY TM_THURSDAY
! 145:
! 146: /*
! 147: ** Accurate only for the past couple of centuries;
! 148: ** that will probably do.
! 149: */
! 150:
! 151: #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)
! 152:
! 153: #endif /* !_TZFILE_H_ */
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