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61d64408a1
This patch updates files coming from tzcode to tzcode 2020a. This is mostly for better support for Internet RFC 8536, by adding support to zic for the Expires line (new to tzcode 2020a), the -b option (new to 2019b) and the -r option (new to 2019a). One trivial change to other glibc was needed. * time/tzfile.c (__tzfile_read): Adjust to tzcode private.h renaming. * timezone/private.h, timezone/tzfile.h, timezone/version: * timezone/zdump.c, timezone/zic.c: Update from tzcode 2020a.
124 lines
3.9 KiB
C
124 lines
3.9 KiB
C
/* Layout and location of TZif files. */
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#ifndef TZFILE_H
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#define TZFILE_H
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/*
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** This file is in the public domain, so clarified as of
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** 1996-06-05 by Arthur David Olson.
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*/
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/*
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** This header is for use ONLY with the time conversion code.
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** There is no guarantee that it will remain unchanged,
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** or that it will remain at all.
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** Do NOT copy it to any system include directory.
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** Thank you!
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*/
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/*
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** Information about time zone files.
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*/
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#ifndef TZDIR
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#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */
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#endif /* !defined TZDIR */
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#ifndef TZDEFAULT
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#define TZDEFAULT "/etc/localtime"
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#endif /* !defined TZDEFAULT */
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#ifndef TZDEFRULES
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#define TZDEFRULES "posixrules"
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#endif /* !defined TZDEFRULES */
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/* See Internet RFC 8536 for more details about the following format. */
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/*
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** Each file begins with. . .
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*/
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#define TZ_MAGIC "TZif"
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struct tzhead {
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char tzh_magic[4]; /* TZ_MAGIC */
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char tzh_version[1]; /* '\0' or '2' or '3' as of 2013 */
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char tzh_reserved[15]; /* reserved; must be zero */
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char tzh_ttisutcnt[4]; /* coded number of trans. time flags */
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char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
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char tzh_leapcnt[4]; /* coded number of leap seconds */
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char tzh_timecnt[4]; /* coded number of transition times */
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char tzh_typecnt[4]; /* coded number of local time types */
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char tzh_charcnt[4]; /* coded number of abbr. chars */
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};
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/*
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** . . .followed by. . .
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**
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** tzh_timecnt (char [4])s coded transition times a la time(2)
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** tzh_timecnt (unsigned char)s types of local time starting at above
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** tzh_typecnt repetitions of
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** one (char [4]) coded UT offset in seconds
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** one (unsigned char) used to set tm_isdst
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** one (unsigned char) that's an abbreviation list index
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** tzh_charcnt (char)s '\0'-terminated zone abbreviations
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** tzh_leapcnt repetitions of
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** one (char [4]) coded leap second transition times
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** one (char [4]) total correction after above
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** tzh_ttisstdcnt (char)s indexed by type; if 1, transition
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** time is standard time, if 0,
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** transition time is local (wall clock)
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** time; if absent, transition times are
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** assumed to be local time
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** tzh_ttisutcnt (char)s indexed by type; if 1, transition
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** time is UT, if 0, transition time is
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** local time; if absent, transition
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** times are assumed to be local time.
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** When this is 1, the corresponding
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** std/wall indicator must also be 1.
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*/
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/*
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** If tzh_version is '2' or greater, the above is followed by a second instance
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** of tzhead and a second instance of the data in which each coded transition
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** time uses 8 rather than 4 chars,
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** then a POSIX-TZ-environment-variable-style string for use in handling
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** instants after the last transition time stored in the file
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** (with nothing between the newlines if there is no POSIX representation for
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** such instants).
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**
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** If tz_version is '3' or greater, the above is extended as follows.
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** First, the POSIX TZ string's hour offset may range from -167
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** through 167 as compared to the POSIX-required 0 through 24.
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** Second, its DST start time may be January 1 at 00:00 and its stop
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** time December 31 at 24:00 plus the difference between DST and
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** standard time, indicating DST all year.
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*/
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/*
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** In the current implementation, "tzset()" refuses to deal with files that
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** exceed any of the limits below.
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*/
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#ifndef TZ_MAX_TIMES
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#define TZ_MAX_TIMES 2000
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#endif /* !defined TZ_MAX_TIMES */
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#ifndef TZ_MAX_TYPES
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/* This must be at least 17 for Europe/Samara and Europe/Vilnius. */
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#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */
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#endif /* !defined TZ_MAX_TYPES */
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#ifndef TZ_MAX_CHARS
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#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */
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/* (limited by what unsigned chars can hold) */
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#endif /* !defined TZ_MAX_CHARS */
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#ifndef TZ_MAX_LEAPS
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#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */
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#endif /* !defined TZ_MAX_LEAPS */
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#endif /* !defined TZFILE_H */
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