1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/icu/source/tools/tzcode/tzfile.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,180 @@
1.4 +#ifndef TZFILE_H
1.5 +
1.6 +#define TZFILE_H
1.7 +
1.8 +/*
1.9 +** This file is in the public domain, so clarified as of
1.10 +** 1996-06-05 by Arthur David Olson.
1.11 +*/
1.12 +
1.13 +/*
1.14 +** This header is for use ONLY with the time conversion code.
1.15 +** There is no guarantee that it will remain unchanged,
1.16 +** or that it will remain at all.
1.17 +** Do NOT copy it to any system include directory.
1.18 +** Thank you!
1.19 +*/
1.20 +
1.21 +/*
1.22 +** ID
1.23 +*/
1.24 +
1.25 +#ifndef lint
1.26 +#ifndef NOID
1.27 +static char tzfilehid[] = "@(#)tzfile.h 8.1";
1.28 +#endif /* !defined NOID */
1.29 +#endif /* !defined lint */
1.30 +
1.31 +/*
1.32 +** Information about time zone files.
1.33 +*/
1.34 +
1.35 +#ifndef TZDIR
1.36 +#define TZDIR "/usr/local/etc/zoneinfo" /* Time zone object file directory */
1.37 +#endif /* !defined TZDIR */
1.38 +
1.39 +#ifndef TZDEFAULT
1.40 +#define TZDEFAULT "localtime"
1.41 +#endif /* !defined TZDEFAULT */
1.42 +
1.43 +#ifndef TZDEFRULES
1.44 +#define TZDEFRULES "posixrules"
1.45 +#endif /* !defined TZDEFRULES */
1.46 +
1.47 +/*
1.48 +** Each file begins with. . .
1.49 +*/
1.50 +
1.51 +#define TZ_MAGIC "TZif"
1.52 +
1.53 +struct tzhead {
1.54 + char tzh_magic[4]; /* TZ_MAGIC */
1.55 + char tzh_version[1]; /* '\0' or '2' as of 2005 */
1.56 + char tzh_reserved[15]; /* reserved--must be zero */
1.57 + char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
1.58 + char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
1.59 + char tzh_leapcnt[4]; /* coded number of leap seconds */
1.60 + char tzh_timecnt[4]; /* coded number of transition times */
1.61 + char tzh_typecnt[4]; /* coded number of local time types */
1.62 + char tzh_charcnt[4]; /* coded number of abbr. chars */
1.63 +};
1.64 +
1.65 +/*
1.66 +** . . .followed by. . .
1.67 +**
1.68 +** tzh_timecnt (char [4])s coded transition times a la time(2)
1.69 +** tzh_timecnt (unsigned char)s types of local time starting at above
1.70 +** tzh_typecnt repetitions of
1.71 +** one (char [4]) coded UTC offset in seconds
1.72 +** one (unsigned char) used to set tm_isdst
1.73 +** one (unsigned char) that's an abbreviation list index
1.74 +** tzh_charcnt (char)s '\0'-terminated zone abbreviations
1.75 +** tzh_leapcnt repetitions of
1.76 +** one (char [4]) coded leap second transition times
1.77 +** one (char [4]) total correction after above
1.78 +** tzh_ttisstdcnt (char)s indexed by type; if TRUE, transition
1.79 +** time is standard time, if FALSE,
1.80 +** transition time is wall clock time
1.81 +** if absent, transition times are
1.82 +** assumed to be wall clock time
1.83 +** tzh_ttisgmtcnt (char)s indexed by type; if TRUE, transition
1.84 +** time is UTC, if FALSE,
1.85 +** transition time is local time
1.86 +** if absent, transition times are
1.87 +** assumed to be local time
1.88 +*/
1.89 +
1.90 +/*
1.91 +** If tzh_version is '2' or greater, the above is followed by a second instance
1.92 +** of tzhead and a second instance of the data in which each coded transition
1.93 +** time uses 8 rather than 4 chars,
1.94 +** then a POSIX-TZ-environment-variable-style string for use in handling
1.95 +** instants after the last transition time stored in the file
1.96 +** (with nothing between the newlines if there is no POSIX representation for
1.97 +** such instants).
1.98 +*/
1.99 +
1.100 +/*
1.101 +** In the current implementation, "tzset()" refuses to deal with files that
1.102 +** exceed any of the limits below.
1.103 +*/
1.104 +
1.105 +#ifndef TZ_MAX_TIMES
1.106 +#define TZ_MAX_TIMES 1200
1.107 +#endif /* !defined TZ_MAX_TIMES */
1.108 +
1.109 +#ifndef TZ_MAX_TYPES
1.110 +#ifndef NOSOLAR
1.111 +#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
1.112 +#endif /* !defined NOSOLAR */
1.113 +#ifdef NOSOLAR
1.114 +/*
1.115 +** Must be at least 14 for Europe/Riga as of Jan 12 1995,
1.116 +** as noted by Earl Chew.
1.117 +*/
1.118 +#define TZ_MAX_TYPES 20 /* Maximum number of local time types */
1.119 +#endif /* !defined NOSOLAR */
1.120 +#endif /* !defined TZ_MAX_TYPES */
1.121 +
1.122 +#ifndef TZ_MAX_CHARS
1.123 +#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
1.124 + /* (limited by what unsigned chars can hold) */
1.125 +#endif /* !defined TZ_MAX_CHARS */
1.126 +
1.127 +#ifndef TZ_MAX_LEAPS
1.128 +#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
1.129 +#endif /* !defined TZ_MAX_LEAPS */
1.130 +
1.131 +#define SECSPERMIN 60
1.132 +#define MINSPERHOUR 60
1.133 +#define HOURSPERDAY 24
1.134 +#define DAYSPERWEEK 7
1.135 +#define DAYSPERNYEAR 365
1.136 +#define DAYSPERLYEAR 366
1.137 +#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
1.138 +#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
1.139 +#define MONSPERYEAR 12
1.140 +
1.141 +#define TM_SUNDAY 0
1.142 +#define TM_MONDAY 1
1.143 +#define TM_TUESDAY 2
1.144 +#define TM_WEDNESDAY 3
1.145 +#define TM_THURSDAY 4
1.146 +#define TM_FRIDAY 5
1.147 +#define TM_SATURDAY 6
1.148 +
1.149 +#define TM_JANUARY 0
1.150 +#define TM_FEBRUARY 1
1.151 +#define TM_MARCH 2
1.152 +#define TM_APRIL 3
1.153 +#define TM_MAY 4
1.154 +#define TM_JUNE 5
1.155 +#define TM_JULY 6
1.156 +#define TM_AUGUST 7
1.157 +#define TM_SEPTEMBER 8
1.158 +#define TM_OCTOBER 9
1.159 +#define TM_NOVEMBER 10
1.160 +#define TM_DECEMBER 11
1.161 +
1.162 +#define TM_YEAR_BASE 1900
1.163 +
1.164 +#define EPOCH_YEAR 1970
1.165 +#define EPOCH_WDAY TM_THURSDAY
1.166 +
1.167 +#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
1.168 +
1.169 +/*
1.170 +** Since everything in isleap is modulo 400 (or a factor of 400), we know that
1.171 +** isleap(y) == isleap(y % 400)
1.172 +** and so
1.173 +** isleap(a + b) == isleap((a + b) % 400)
1.174 +** or
1.175 +** isleap(a + b) == isleap(a % 400 + b % 400)
1.176 +** This is true even if % means modulo rather than Fortran remainder
1.177 +** (which is allowed by C89 but not C99).
1.178 +** We use this to avoid addition overflow problems.
1.179 +*/
1.180 +
1.181 +#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
1.182 +
1.183 +#endif /* !defined TZFILE_H */
