5411aff6bb
Upstream has renamed tzsetlcl to tzset_unlocked. As bionic's implementation of tzset_unlock differs from upstream, these changes were skipped. Also, upstream has removed constants (SECSPERMIN, etc) from tzfile.h. As they are used in strptime.c, I've decided to leave them in tzfile.h and to not bring them into strptime.c. HAVE_TZNAME and USG_COMPAT flags semantics were updated, thus setting their values to 2 in Android.bp file. See1a27ec76bc*4742526b7eand0e8f0b06acwere picked up, which are not part of 2022a. Changes were applied using following commands: 1) Checkout tzcode repo 2) Prepare patches for all tzcode file using git diff 2016g 2021e -- <file-name> > <file-name-patch> 3) Apply these patches to files in bionic using patch -p1 <file-name> <file-name-patch> Bug: 25413083 Test: CtsLibcoreTestCases Test: CtsLibcoreOjTestCases Test: CtsBionicTestCases Change-Id: I9aba4cbeab30171a32f94d20c8e4057804a4c01f
175 lines
5.1 KiB
C
175 lines
5.1 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'-'4' as of 2021 */
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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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#define SECSPERMIN 60
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#define MINSPERHOUR 60
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#define HOURSPERDAY 24
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#define DAYSPERWEEK 7
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#define DAYSPERNYEAR 365
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#define DAYSPERLYEAR 366
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#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
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#define SECSPERDAY ((int_fast32_t) SECSPERHOUR * HOURSPERDAY)
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#define MONSPERYEAR 12
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#define TM_SUNDAY 0
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#define TM_MONDAY 1
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#define TM_TUESDAY 2
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#define TM_WEDNESDAY 3
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#define TM_THURSDAY 4
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#define TM_FRIDAY 5
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#define TM_SATURDAY 6
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#define TM_JANUARY 0
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#define TM_FEBRUARY 1
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#define TM_MARCH 2
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#define TM_APRIL 3
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#define TM_MAY 4
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#define TM_JUNE 5
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#define TM_JULY 6
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#define TM_AUGUST 7
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#define TM_SEPTEMBER 8
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#define TM_OCTOBER 9
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#define TM_NOVEMBER 10
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#define TM_DECEMBER 11
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#define TM_YEAR_BASE 1900
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#define EPOCH_YEAR 1970
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#define EPOCH_WDAY TM_THURSDAY
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#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
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/*
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** Since everything in isleap is modulo 400 (or a factor of 400), we know that
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** isleap(y) == isleap(y % 400)
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** and so
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** isleap(a + b) == isleap((a + b) % 400)
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** or
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** isleap(a + b) == isleap(a % 400 + b % 400)
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** This is true even if % means modulo rather than Fortran remainder
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** (which is allowed by C89 but not C99).
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** We use this to avoid addition overflow problems.
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*/
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#define isleap_sum(a, b) isleap((a) % 400 + (b) % 400)
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#endif /* !defined TZFILE_H */
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