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CVS log for src/lib/libc/time/version

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Revision 1.15 / (download) - annotate - [select for diffs], Sat Oct 17 16:24:33 2020 UTC (5 weeks, 2 days ago) by christos
Branch: MAIN
CVS Tags: HEAD
Changes since 1.14: +1 -1 lines
Diff to previous 1.14 (colored)

update to 2020c

Revision 1.14 / (download) - annotate - [select for diffs], Fri Oct 9 18:38:48 2020 UTC (6 weeks, 3 days ago) by christos
Branch: MAIN
Changes since 1.13: +1 -1 lines
Diff to previous 1.13 (colored)

Merge tzcode2020b (except we keep tzsetwall(3) for now for compatibility,
and we were "slim" already)

Support for zic's long-obsolete '-y YEARISTYPE' option has been
removed and, with it, so has support for the TYPE field in Rule
lines, which is now reserved for compatibility with earlier zic.
These features were previously deprecated in release 2015f.
(Thanks to Tim Parenti.)

zic now defaults to '-b slim' instead of to '-b fat'.

zic's new '-l -' and '-p -' options uninstall any existing
localtime and posixrules files, respectively.

The undocumented and ineffective tzsetwall function has been
removed.

Revision 1.13 / (download) - annotate - [select for diffs], Mon May 25 14:52:48 2020 UTC (5 months, 4 weeks ago) by christos
Branch: MAIN
Changes since 1.12: +1 -1 lines
Diff to previous 1.12 (colored)

Bring in 2020a

Revision 1.12 / (download) - annotate - [select for diffs], Wed Jul 3 15:50:16 2019 UTC (16 months, 3 weeks ago) by christos
Branch: MAIN
CVS Tags: phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, netbsd-9-base, netbsd-9-1-RELEASE, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, is-mlppp-base, is-mlppp
Changes since 1.11: +1 -1 lines
Diff to previous 1.11 (colored)

Sync with 2019b:

    zic's new -b option supports a way to control data bloat and to
    test for year-2038 bugs in software that reads TZif files.
    'zic -b fat' and 'zic -b slim' generate larger and smaller output;
    for example, changing from fat to slim shrinks the Europe/London
    file from 3648 to 1599 bytes, saving about 56%.  Fat and slim
    files represent the same set of timestamps and use the same TZif
    format as documented in tzfile(5) and in Internet RFC 8536.
    Fat format attempts to work around bugs or incompatibilities in
    older software, notably software that mishandles 64-bit TZif data
    or uses obsolete TZ strings like "EET-2EEST" that lack DST rules.
    Slim format is more efficient and does not work around 64-bit bugs
    or obsolete TZ strings.  Currently zic defaults to fat format
    unless you compile with -DZIC_BLOAT_DEFAULT=\"slim\"; this
    out-of-the-box default is intended to change in future releases
    as the buggy software often mishandles timestamps anyway.

    zic no longer treats a set of rules ending in 2037 specially.
    Previously, zic assumed that such a ruleset meant that future
    timestamps could not be predicted, and therefore omitted a
    POSIX-like TZ string in the TZif output.  The old behavior is no
    longer needed for current tzdata, and caused problems with newlib
    when used with older tzdata (reported by David Gauchard).

    zic no longer generates some artifact transitions.  For example,
    Europe/London no longer has a no-op transition in January 1996.

Revision 1.11 / (download) - annotate - [select for diffs], Thu Apr 4 18:18:31 2019 UTC (19 months, 3 weeks ago) by christos
Branch: MAIN
CVS Tags: phil-wifi-20190609
Changes since 1.10: +1 -1 lines
Diff to previous 1.10 (colored)

merge 2019a

  Changes to code

    zic now has an -r option to limit the time range of output data.
    For example, 'zic -r @1000000000' limits the output data to
    timestamps starting 1000000000 seconds after the Epoch.
    This helps shrink output size and can be useful for applications
    not needing the full timestamp history, such as TZDIST truncation;
    see Internet RFC 8536 section 5.1.  (Inspired by a feature request
    from Christopher Wong, helped along by bug reports from Wong and
    from Tim Parenti.)

  Changes to documentation

    Mention Internet RFC 8536 (February 2019), which documents TZif.

    tz-link.html now cites tzdata-meta
    <https://tzdata-meta.timtimeonline.com/>.

Revision 1.10 / (download) - annotate - [select for diffs], Tue Jan 1 03:04:56 2019 UTC (22 months, 3 weeks ago) by christos
Branch: MAIN
CVS Tags: pgoyette-compat-20190127, pgoyette-compat-20190118
Changes since 1.9: +1 -1 lines
Diff to previous 1.9 (colored)

Release 2018i - 2018-12-30 11:05:43 -0800

  Briefly:
    São Tomé and Príncipe switches from +01 to +00 on 2019-01-01.

  Changes to future timestamps

    Due to a change in government, São Tomé and Príncipe switches back
    from +01 to +00 on 2019-01-01 at 02:00.  (Thanks to Vadim
    Nasardinov and Michael Deckers.)


Release 2018h - 2018-12-23 17:59:32 -0800

  Briefly:
    Qyzylorda, Kazakhstan moved from +06 to +05 on 2018-12-21.
    New zone Asia/Qostanay because Qostanay, Kazakhstan didn't move.
    Metlakatla, Alaska observes PST this winter only.
    Guess Morocco will continue to adjust clocks around Ramadan.
    Add predictions for Iran from 2038 through 2090.

  Changes to future timestamps

    Guess that Morocco will continue to fall back just before and
    spring forward just after Ramadan, the practice since 2012.
    (Thanks to Maamar Abdelkader.)  This means Morocco will observe
    negative DST during Ramadan in main and vanguard formats, and in
    rearguard format it stays in the +00 timezone and observes
    ordinary DST in all months other than Ramadan.  As before, extend
    this guesswork to the year 2037.  As a consequence, Morocco is
    scheduled to observe three DST transitions in some Gregorian years
    (e.g., 2033) due to the mismatch between the Gregorian and Islamic
    calendars.

    The table of exact transitions for Iranian DST has been extended.
    It formerly cut off before the year 2038 in a nod to 32-bit time_t.
    It now cuts off before 2091 as there is doubt about how the Persian
    calendar will treat 2091.  This change predicts DST transitions in
    2038-9, 2042-3, and 2046-7 to occur one day later than previously
    predicted.  As before, post-cutoff transitions are approximated.

  Changes to past and future timestamps

    Qyzylorda (aka Kyzylorda) oblast in Kazakhstan moved from +06 to
    +05 on 2018-12-21.  This is a zone split as Qostanay (aka
    Kostanay) did not switch, so create a zone Asia/Qostanay.

    Metlakatla moved from Alaska to Pacific standard time on 2018-11-04.
    It did not change clocks that day and remains on -08 this winter.
    (Thanks to Ryan Stanley.)  It will revert to the usual Alaska
    rules next spring, so this change affects only timestamps
    from 2018-11-04 through 2019-03-10.

  Change to past timestamps

    Kwajalein's 1993-08-20 transition from -12 to +12 was at 24:00,
    not 00:00.  I transcribed the time incorrectly from Shanks.
    (Thanks to Phake Nick.)

    Nauru's 1979 transition was on 02-10 at 02:00, not 05-01 at 00:00.
    (Thanks to Phake Nick.)

    Guam observed DST irregularly from 1959 through 1977.
    (Thanks to Phake Nick.)

    Hong Kong observed DST in 1941 starting 06-15 (not 04-01), then on
    10-01 changed standard time to +08:30 (not +08).  Its transition
    back to +08 after WWII was on 1945-09-15, not the previous day.
    Its 1904-10-30 change took effect at 01:00 +08 (not 00:00 LMT).
    (Thanks to Phake Nick, Steve Allen, and Joseph Myers.)  Also,
    its 1952 fallback was on 11-02 (not 10-25).

    This release contains many changes to timestamps before 1946 due
    to Japanese possession or occupation of Pacific/Chuuk,
    Pacific/Guam, Pacific/Kosrae, Pacific/Kwajalein, Pacific/Majuro,
    Pacific/Nauru, Pacific/Palau, and Pacific/Pohnpei.
    (Thanks to Phake Nick.)

    Assume that the Spanish East Indies was like the Philippines and
    observed American time until the end of 1844.  This affects
    Pacific/Chuuk, Pacific/Kosrae, Pacific/Palau, and Pacific/Pohnpei.

  Changes to past tm_isdst flags

    For the recent Morocco change, the tm_isdst flag should be 1 from
    2018-10-27 00:00 to 2018-10-28 03:00.  (Thanks to Michael Deckers.)
    Give a URL to the official decree.  (Thanks to Matt Johnson.)

Revision 1.9 / (download) - annotate - [select for diffs], Sat Oct 27 22:29:24 2018 UTC (2 years ago) by christos
Branch: MAIN
CVS Tags: pgoyette-compat-1226, pgoyette-compat-1126
Changes since 1.8: +1 -1 lines
Diff to previous 1.8 (colored)

Welcome tzcode-2018g

  Changes to code

    When generating TZif files with leap seconds, zic no longer uses a
    format that trips up older 32-bit clients, fixing a bug introduced
    in 2018f.  (Reported by Daniel Fischer.)  Also, the zic workaround
    for QTBUG-53071 now also works for TZif files with leap seconds.

    The translator to rearguard format now rewrites the line
    "Rule Japan 1948 1951 - Sep Sat>=8 25:00 0 S" to
    "Rule Japan 1948 1951 - Sep Sun>=9  1:00 0 S".
    This caters to zic before 2007 and to Oracle TZUpdater 2.2.0
    and earlier.  (Reported by Christos Zoulas.)

  Changes to documentation

    tzfile.5 has new sections on interoperability issues.

Revision 1.8 / (download) - annotate - [select for diffs], Fri Oct 19 23:05:35 2018 UTC (2 years, 1 month ago) by christos
Branch: MAIN
CVS Tags: pgoyette-compat-1020
Changes since 1.7: +1 -1 lines
Diff to previous 1.7 (colored)

Update to 2018f:

  Changes to code

    zic now always generates TZif files where time type 0 is used for
    timestamps before the first transition.  This simplifies the
    reading of TZif files and should not affect behavior of existing
    TZif readers because the same set of time types is used; only
    their internal indexes may have changed.  This affects only the
    legacy zones EST5EDT, CST6CDT, MST7MDT, PST8PDT, CET, MET, and
    EET, which previously used nonzero types for these timestamps.

    Because of the type 0 change, zic no longer outputs a dummy
    transition at time -2**59 (before the Big Bang), as clients should
    no longer need this to handle historical timestamps correctly.
    This reverts a change introduced in 2013d and shrinks most TZif
    files by a few bytes.

    zic now supports negative time-of-day in Rule and Leap lines, e.g.,
    "Rule X min max - Apr lastSun -6:00 1:00 -" means the transition
    occurs at 18:00 on the Saturday before the last Sunday in April.
    This behavior was documented in 2018a but the code did not
    entirely match the documentation.

    localtime.c no longer requires at least one time type in TZif
    files that lack transitions or have a POSIX-style TZ string.  This
    future-proofs the code against possible future extensions to the
    format that would allow TZif files with POSIX-style TZ strings and
    without transitions or time types.

    A read-access subscript error in localtime.c has been fixed.
    It could occur only in TZif files with timecnt == 0, something that
    does not happen in practice now but could happen in future versions.

    localtime.c no longer ignores TZif POSIX-style TZ strings that
    specify only standard time.  Instead, these TZ strings now
    override the default time type for timestamps after the last
    transition (or for all time stamps if there are no transitions),
    just as DST strings specifying DST have always done.

    leapseconds.awk now outputs "#updated" and "#expires" comments,
    and supports leap seconds at the ends of months other than June
    and December.  (Inspired by suggestions from Chris Woodbury.)

  Changes to documentation

    New restrictions: A Rule name must start with a character that
    is neither an ASCII digit nor "-" nor "+", and an unquoted name
    should not use characters in the set "!$%&'()*,/:;<=>?@[\]^`{|}~".
    The latter restriction makes room for future extensions (a
    possibility noted by Tom Lane).

    tzfile.5 now documents what time types apply before the first and
    after the last transition, if any.

    Documentation now uses the spelling "timezone" for a TZ setting
    that determines timestamp history, and "time zone" for a
    geographic region currently sharing the same standard time.

    The name "TZif" is now used for the tz binary data format.

    tz-link.htm now mentions the A0 TimeZone Migration utilities.
    (Thanks to Aldrin Martoq for the link.)

Revision 1.7 / (download) - annotate - [select for diffs], Fri May 4 15:51:00 2018 UTC (2 years, 6 months ago) by christos
Branch: MAIN
CVS Tags: phil-wifi-base, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521
Branch point for: phil-wifi
Changes since 1.6: +1 -1 lines
Diff to previous 1.6 (colored)

Merge 2018e

  Changes to code

    zic now accepts subsecond precision in expressions like
    00:19:32.13, which is approximately the legal time of the
    Netherlands from 1835 to 1937.  However, because it is
    questionable whether the few recorded uses of non-integer offsets
    had subsecond precision in practice, there are no plans for tzdata
    to use this feature.  (Thanks to Steve Allen for pointing out
    the limitations of historical data in this area.)

    The code is a bit more portable to MS-Windows.  Installers can
    compile with -DRESERVE_STD_EXT_IDS on MS-Windows platforms that
    reserve identifiers like 'localtime'.  (Thanks to Manuela
    Friedrich).

  Changes to documentation and commentary

    theory.html now outlines tzdb's extensions to POSIX's model for
    civil time, and has a section "POSIX features no longer needed"
    that lists POSIX API components that are now vestigial.
    (From suggestions by Steve Summit.)  It also better distinguishes
    time zones from tz regions.  (From a suggestion by Guy Harris.)

    Commentary is now more consistent about using the phrase "daylight
    saving time", to match the C name tm_isdst.  Daylight saving time
    need not occur in summer, and need not have a positive offset from
    standard time.

    Commentary about historical transitions in Uruguay has been expanded
    with links to many relevant legal documents.
    (Thanks to Tim Parenti.)

    Commentary now uses some non-ASCII characters with Unicode value
    less than U+0100, as they can be useful and should work even with
    older editors such as XEmacs.

Revision 1.6 / (download) - annotate - [select for diffs], Thu Jan 25 22:48:42 2018 UTC (2 years, 9 months ago) by christos
Branch: MAIN
CVS Tags: pgoyette-compat-base, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315
Branch point for: pgoyette-compat
Changes since 1.5: +1 -1 lines
Diff to previous 1.5 (colored)

Merge tzcode2018c [ changelog with changes to tzdata sections removed ]

Release 2018c - 2018-01-22 23:00:44 -0800

  Changes to build procedure

    The build procedure now works around mawk 1.3.3's lack of support
    for character class expressions.  (Problem reported by Ohyama.)


Release 2018b - 2018-01-17 23:24:48 -0800

  Changes to build procedure

    The distribution now contains the file 'pacificnew' again.
    This file was inadvertantly omitted in the 2018a distribution.
    (Problem reported by Matias Fonzo.)


Release 2018a - 2018-01-12 22:29:21 -0800

  Changes to build procedure

    The default installation locations have been changed to mostly
    match Debian circa 2017, instead of being designed as an add-on to
    4.3BSD circa 1986.  This affects the Makefile macros TOPDIR,
    TZDIR, MANDIR, and LIBDIR.  New Makefile macros TZDEFAULT, USRDIR,
    USRSHAREDIR, BINDIR, ZDUMPDIR, and ZICDIR let installers tailor
    locations more precisely.  (This responds to suggestions from
    Brian Inglis and from Steve Summit.)

    The default installation procedure no longer creates the
    backward-compatibility link US/Pacific-New, which causes
    confusion during user setup (e.g., see Debian bug 815200).
    Use 'make BACKWARD="backward pacificnew"' to create the link
    anyway, for now.  Eventually we plan to remove the link entirely.

    tzdata.zi now contains a version-number comment.
    (Suggested by Tom Lane.)

    The Makefile now quotes values like BACKWARD more carefully when
    passing them to the shell.  (Problem reported by Zefram.)

    Builders no longer need to specify -DHAVE_SNPRINTF on platforms
    that have snprintf and use pre-C99 compilers.  (Problem reported
    by Jon Skeet.)

  Changes to code

    zic has a new option -t FILE that specifies the location of the
    file that determines local time when TZ is unset.  The default for
    this location can be configured via the new TZDEFAULT makefile
    macro, which defaults to /etc/localtime.

    Diagnostics and commentary now distinguish UT from UTC more
    carefully; see theory.html for more information about UT vs UTC.

    zic has been ported to GCC 8's -Wstringop-truncation option.
    (Problem reported by Martin Sebor.)

  Changes to documentation and commentary

    The zic man page now documents the longstanding behavior that
    times and years can be out of the usual range, with negative times
    counting backwards from midnight and with year 0 preceding year 1.
    (Problem reported by Michael Deckers.)

    The theory.html file now mentions the POSIX limit of six chars
    per abbreviation, and lists alphabetic abbreviations used.

    The files tz-art.htm and tz-link.htm have been renamed to
    tz-art.html and tz-link.html, respectively, for consistency with
    other file names and to simplify web server configuration.

Revision 1.5 / (download) - annotate - [select for diffs], Tue Oct 24 17:38:17 2017 UTC (3 years, 1 month ago) by christos
Branch: MAIN
Changes since 1.4: +1 -1 lines
Diff to previous 1.4 (colored)

Welcome to 2017c:

    zic and the reference runtime now reject multiple leap seconds
    within 28 days of each other, or leap seconds before the Epoch.
    As a result, support for double leap seconds, which was
    obsolescent and undocumented, has been removed.  Double leap
    seconds were an error in the C89 standard; they have never existed
    in civil timekeeping.  (Thanks to Robert Elz and Bradley White for
    noticing glitches in the code that uncovered this problem.)

    zic now warns about use of the obsolescent and undocumented -y
    option, and about use of the obsolescent TYPE field of Rule lines.

    zic now allows unambiguous abbreviations like "Sa" and "Su" for
    weekdays; formerly it rejected them due to a bug.  Conversely, zic
    no longer considers non-prefixes to be abbreviations; for example,
    it no longer accepts "lF" as an abbreviation for "lastFriday".
    Also, zic warns about the undocumented usage with a "last-"
    prefix, e.g., "last-Fri".

    Similarly, zic now accepts the unambiguous abbreviation "L" for
    "Link" in ordinary context and for "Leap" in leap-second context.
    Conversely, zic no longer accepts non-prefixes such as "La" as
    abbreviations for words like "Leap".

    zic no longer accepts leap second lines in ordinary input, or
    ordinary lines in leap second input.  Formerly, zic sometimes
    warned about this undocumented usage and handled it incorrectly.

    The new macro HAVE_TZNAME governs whether the tzname external
    variable is exported, instead of USG_COMPAT.  USG_COMPAT now
    governs only the external variables "timezone" and "daylight".
    This change is needed because the three variables are not in the
    same category: although POSIX requires tzname, it specifies the
    other two variables as optional.  Also, USG_COMPAT is now 1 or 0:
    if not defined, the code attempts to guess it from other macros.

    localtime.c and difftime.c no longer require stdio.h, and .c files
    other than zic.c no longer require sys/wait.h.

    zdump.c no longer assumes snprintf.  (Reported by Jonathan Leffler.)

    Calculation of time_t extrema works around a bug in GCC 4.8.4
    (Reported by Stan Shebs and Joseph Myers.)

    zic.c no longer mistranslates formats of line numbers in non-English
    locales.  (Problem reported by Benno Schulenberg.)

    Several minor changes have been made to the code to make it a
    bit easier to port to MS-Windows and Solaris.  (Thanks to Kees
    Dekker for reporting the problems.)

  Changes to documentation and commentary

    The two new files 'theory.html' and 'calendars' contain the
    contents of the removed file 'Theory'.  The goal is to document
    tzdb theory more accessibly.

    The zic man page now documents abbreviation rules.

    tz-link.htm now covers how to apply tzdata changes to clients.
    (Thanks to Jorge Fábregas for the AIX link.)  It also mentions MySQL.

    The leap-seconds.list URL has been updated to something that is
    more reliable for tzdb.  (Thanks to Tim Parenti and Brian Inglis.)

Revision 1.4 / (download) - annotate - [select for diffs], Tue Apr 25 13:19:45 2017 UTC (3 years, 7 months ago) by christos
Branch: MAIN
CVS Tags: prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, pgoyette-localcount-20170426, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, matt-nb8-mediatek-base, matt-nb8-mediatek
Changes since 1.3: +1 -1 lines
Diff to previous 1.3 (colored)

merge tzcode2017b.

Revision 1.3 / (download) - annotate - [select for diffs], Sat Mar 11 18:23:14 2017 UTC (3 years, 8 months ago) by christos
Branch: MAIN
CVS Tags: pgoyette-localcount-20170320, bouyer-socketcan-base1
Changes since 1.2: +1 -1 lines
Diff to previous 1.2 (colored)

merge 2017a

Revision 1.2 / (download) - annotate - [select for diffs], Fri Nov 4 19:41:53 2016 UTC (4 years ago) by christos
Branch: MAIN
CVS Tags: pgoyette-localcount-20170107, bouyer-socketcan-base
Branch point for: bouyer-socketcan
Changes since 1.1: +1 -1 lines
Diff to previous 1.1 (colored)

tzcode2016i

Revision 1.1 / (download) - annotate - [select for diffs], Thu Oct 20 17:41:34 2016 UTC (4 years, 1 month ago) by christos
Branch: MAIN
CVS Tags: pgoyette-localcount-20161104
Branch point for: pgoyette-localcount

welcome to 2016h

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