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Annotation of kernel/bsd/include/tzfile.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * Copyright (c) 1988, 1993
        !            27:  *     The Regents of the University of California.  All rights reserved.
        !            28:  *
        !            29:  * This code is derived from software contributed to Berkeley by
        !            30:  * Arthur David Olson of the National Cancer Institute.
        !            31:  *
        !            32:  * Redistribution and use in source and binary forms, with or without
        !            33:  * modification, are permitted provided that the following conditions
        !            34:  * are met:
        !            35:  * 1. Redistributions of source code must retain the above copyright
        !            36:  *    notice, this list of conditions and the following disclaimer.
        !            37:  * 2. Redistributions in binary form must reproduce the above copyright
        !            38:  *    notice, this list of conditions and the following disclaimer in the
        !            39:  *    documentation and/or other materials provided with the distribution.
        !            40:  * 3. All advertising materials mentioning features or use of this software
        !            41:  *    must display the following acknowledgement:
        !            42:  *     This product includes software developed by the University of
        !            43:  *     California, Berkeley and its contributors.
        !            44:  * 4. Neither the name of the University nor the names of its contributors
        !            45:  *    may be used to endorse or promote products derived from this software
        !            46:  *    without specific prior written permission.
        !            47:  *
        !            48:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            49:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            50:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            51:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            52:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            53:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            54:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            55:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            56:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            57:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            58:  * SUCH DAMAGE.
        !            59:  *
        !            60:  *     @(#)tzfile.h    8.1 (Berkeley) 6/2/93
        !            61:  */
        !            62: 
        !            63: #ifndef _TZFILE_H_
        !            64: #define        _TZFILE_H_
        !            65: 
        !            66: /*
        !            67:  * Information about time zone files.
        !            68:  */
        !            69:                        /* Time zone object file directory */
        !            70: #define TZDIR          "/usr/share/zoneinfo"
        !            71: #define TZDEFAULT      "/etc/localtime"
        !            72: #define TZDEFRULES     "posixrules"
        !            73: 
        !            74: /*
        !            75: ** Each file begins with. . .
        !            76: */
        !            77: 
        !            78: struct tzhead {
        !            79:        char    tzh_reserved[24];       /* reserved for future use */
        !            80:        char    tzh_ttisstdcnt[4];      /* coded number of trans. time flags */
        !            81:        char    tzh_leapcnt[4];         /* coded number of leap seconds */
        !            82:        char    tzh_timecnt[4];         /* coded number of transition times */
        !            83:        char    tzh_typecnt[4];         /* coded number of local time types */
        !            84:        char    tzh_charcnt[4];         /* coded number of abbr. chars */
        !            85: };
        !            86: 
        !            87: /*
        !            88: ** . . .followed by. . .
        !            89: **
        !            90: **     tzh_timecnt (char [4])s         coded transition times a la time(2)
        !            91: **     tzh_timecnt (unsigned char)s    types of local time starting at above
        !            92: **     tzh_typecnt repetitions of
        !            93: **             one (char [4])          coded GMT offset in seconds
        !            94: **             one (unsigned char)     used to set tm_isdst
        !            95: **             one (unsigned char)     that's an abbreviation list index
        !            96: **     tzh_charcnt (char)s             '\0'-terminated zone abbreviations
        !            97: **     tzh_leapcnt repetitions of
        !            98: **             one (char [4])          coded leap second transition times
        !            99: **             one (char [4])          total correction after above
        !           100: **     tzh_ttisstdcnt (char)s          indexed by type; if TRUE, transition
        !           101: **                                     time is standard time, if FALSE,
        !           102: **                                     transition time is wall clock time
        !           103: **                                     if absent, transition times are
        !           104: **                                     assumed to be wall clock time
        !           105: */
        !           106: 
        !           107: /*
        !           108: ** In the current implementation, "tzset()" refuses to deal with files that
        !           109: ** exceed any of the limits below.
        !           110: */
        !           111: 
        !           112: /*
        !           113: ** The TZ_MAX_TIMES value below is enough to handle a bit more than a
        !           114: ** year's worth of solar time (corrected daily to the nearest second) or
        !           115: ** 138 years of Pacific Presidential Election time
        !           116: ** (where there are three time zone transitions every fourth year).
        !           117: */
        !           118: #define TZ_MAX_TIMES   370
        !           119: 
        !           120: #define NOSOLAR                        /* 4BSD doesn't currently handle solar time */
        !           121: 
        !           122: #ifndef NOSOLAR
        !           123: #define TZ_MAX_TYPES   256     /* Limited by what (unsigned char)'s can hold */
        !           124: #else
        !           125: #define TZ_MAX_TYPES   10      /* Maximum number of local time types */
        !           126: #endif
        !           127: 
        !           128: #define TZ_MAX_CHARS   50      /* Maximum number of abbreviation characters */
        !           129: 
        !           130: #define        TZ_MAX_LEAPS    50      /* Maximum number of leap second corrections */
        !           131: 
        !           132: #define SECSPERMIN     60
        !           133: #define MINSPERHOUR    60
        !           134: #define HOURSPERDAY    24
        !           135: #define DAYSPERWEEK    7
        !           136: #define DAYSPERNYEAR   365
        !           137: #define DAYSPERLYEAR   366
        !           138: #define SECSPERHOUR    (SECSPERMIN * MINSPERHOUR)
        !           139: #define SECSPERDAY     ((long) SECSPERHOUR * HOURSPERDAY)
        !           140: #define MONSPERYEAR    12
        !           141: 
        !           142: #define TM_SUNDAY      0
        !           143: #define TM_MONDAY      1
        !           144: #define TM_TUESDAY     2
        !           145: #define TM_WEDNESDAY   3
        !           146: #define TM_THURSDAY    4
        !           147: #define TM_FRIDAY      5
        !           148: #define TM_SATURDAY    6
        !           149: 
        !           150: #define TM_JANUARY     0
        !           151: #define TM_FEBRUARY    1
        !           152: #define TM_MARCH       2
        !           153: #define TM_APRIL       3
        !           154: #define TM_MAY         4
        !           155: #define TM_JUNE                5
        !           156: #define TM_JULY                6
        !           157: #define TM_AUGUST      7
        !           158: #define TM_SEPTEMBER   8
        !           159: #define TM_OCTOBER     9
        !           160: #define TM_NOVEMBER    10
        !           161: #define TM_DECEMBER    11
        !           162: 
        !           163: #define TM_YEAR_BASE   1900
        !           164: 
        !           165: #define EPOCH_YEAR     1970
        !           166: #define EPOCH_WDAY     TM_THURSDAY
        !           167: 
        !           168: /*
        !           169: ** Accurate only for the past couple of centuries;
        !           170: ** that will probably do.
        !           171: */
        !           172: 
        !           173: #define isleap(y) (((y) % 4) == 0 && ((y) % 100) != 0 || ((y) % 400) == 0)
        !           174: 
        !           175: #endif /* !_TZFILE_H_ */

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