These let the user select TZ based on geographical coordinates.
Combining '-c COORD' with '-t time' better insulates the user from
issues of nationality.
* tzselect.8 (SYNOPSIS, OPTIONS): Document the new options.
* tzselect.ksh: Implement them, using the great-circle special
case of the Vicenty formula for distances on ellipsoids.
(LC_ALL): Set to C, since tzselect is English only. That way, we
treat decimal-points in -c option operands the same in all environments.
(usage): Document new options. Document existing ones better.
(output_distances): New variable.
(main): Don't assume SECSPERDAY <= INT_MAX here, since we try
not to assume that sort of thing elsewhere in this file.
Don't rely on undefined behavior in the weird case where
cuthitime < absolute_min_time + SECSPERDAY / 2.
This is a backwards-compatible way of transitioning to a less
politically-charged approach to choosing TZ values. A new time
zone table time.tab acts like zone.tab, except it omits TZ values
that are present only for political reasons. tzselect has a new
"-t zonetabtype" option that lets users select which time zone table
to use, and installers can select the default table. The zone.tab
file does not change, and the default tzselect table for now is
zone.tab. This avoids the backward-compatibility concerns
expressed on the tz mailing list; see, for example,
the discussion surrounding Derick Rethans's comments in
<http://mm.icann.org/pipermail/tz/2013-August/019544.html>
* .gitignore: Add time.tab.
* Makefile (ZONETABTYPE): New macro.
(TABDATA): Add time.tab.
(all): Depend on $(TABDATA).
(install): Do not depend on $(TABDATA), since $(DATA) includes it.
Install time.tab too.
(time.tab): New rule.
(tzselect.tab): Substitute ZONETABTYPE.
* zone-time.awk: New file.
* tzselect.8: Document new options, and --help and --version while
we're at it.
* tzselect.ksh (ZONETABTYPE): New var.
Implement -t ZONETABTYPE option.
Check that no extra operands are given.
* zone.tab: Change first comment line, to distinguish the two
tables better.
This unnecessary duplicate of America/Denver was confusing, as it
incorrectly implied that 'Mountain Time - Navajo' differed from
'Mountain Time' either now or in the past. Clarify this in a
better way, by mentioning in the Arizona entry that it doesn't
include Navajo.
On my platform (Ubuntu 13.04 x86-64, Xeon E3-1225 V2), this sped up
'zdump -V -c 2147483647,2147483648 America/Los_Angeles'
from 13.880 to 0.000 seconds user+system time.
(INTMAX_MAX): Define if the system doesn't.
(SECSPER400YEARS): New macro.
(SECSPER400YEARS_FITS): New constant.
(yeartot): Speed up by using division instead of
repeated subtraction.
* iso3166.tab, zone.tab: Make it clear that country codes aren't
necessarily for countries. Thanks to Derick Rethans for spotting this.
* zone.tab (Antarctica/McMurdo, Europe/Mariehamn, Europe/Sarajevo)
(America/St_Barthelemy, America/Kralendijk, Europe/Busingen)
(Europe/Guernsey, Europe/Zagreb, Europe/Isle_of_Man, Europe/Jersey)
(Europe/Podgorica, America/Marigot, Europe/Skopje, Europe/Ljubljana)
(Arctic/Longyearbyen, Europe/Bratislava, Europe/San_Marino)
(America/Lower_Princes, Europe/Vatican):
Undo recent changes, going back to the way these entries were done
in the last tz distribution. Only the Antarctica/South_Pole change
was retained.
* Makefile (TZDIR_BASENAME): New macro.
(TZDIR): Use it.
(other_two): Remove.
(right_posix, posix_right): Use a symbolic link if supported.
This saves about 2 megabytes' worth of installed files.
This continues in the series of moving entries to 'backward' if
they exist only because of obsolete tz rules about country codes.
This change does not affect any time stamps after 1970. Unlike
the previous change in this series, this one does affect time
stamps before 1970, but that's OK as pre-1970 time stamps are
out of scope for the tz database.
* antarctica (Antarctica/McMurdo, Antarctica/South_Pole):
Move to 'backward' and link to Pacific/Auckland.
* backward: Move links here from 'antarctica'.
* zone.tab: Coalesce McMurdo and South Pole, and add Scott Base
to the description.
* asia (Asia/Dili, Asia/Jakarta, Asia/Pontianak, Asia/Makassar)
(Asia/Jayapura): Use WIB/WITA/WIT rather than WIT/CIT/EIT, since
it's typical to use Indonesian-language abbreviations even when
writing in English. I surveyed the Internet and Google Books and
found several independent English-language sources using WIB/WITA/WIT,
whereas it seemed only tz-inspired sources used WIT/CIT/EIT.
Problem reported several times, by George Ziegler, Priyadi Iman
Nurcahyo, Zakaria, Jason Grimes, Martin Pitt, and Benny Lin;
see Lin's summary of the reports in
<http://mm.icann.org/pipermail/tz/2013-February/018609.html>.
This change does not affect time zone offsets, just alphabetic
abbreviations, such as tm_zone in the BSD-style struct tm.
(Asia/Jakarta): Use BMT, not JMT, for mean time from 1923 to 1932,
as Jakarta was called Batavia back then.
* backward: Move links here from other files, if the only reason
they existed was to fill out zone.tab. Zones are now allowed to
cross national borders, so a zone now need not exist merely
because there's a national border. Sort the list consistently.
None of this changes any time stamp in the database.
* checktab.awk: Don't require that zone.tab's column 3 be unique.
* europe (Europe/Jersey, Europe/Guernsey, Europe/Isle_of_Man)
(Europe/Mariehamn, Europe/Busingen, Europe/Vatican, Europe/San_Marino)
(Arctic/Longyearbyen, Europe/Ljubljana, Europe/Podgorica)
(Europe/Sarajevo, Europe/Skopje, Europe/Zagreb, Europe/Bratislava):
* northamerica (America/St_Barthelemy, America/Marigot):
* southamerica (America/Lower_Princes, America/Kralendijk):
Move links to 'backward'.
* zone.tab: Give more details about how different rows can have
duplicate column 1 or column 3. For each link moved to 'backward',
change column 3 to be the non-backward name.
* date.1: Document -r.
* date.c (main, usage): Support -r.
(main, reset): Remove EBUG code.
(display): New argument NOW. Do not exit; that's now the
caller's responsibility. All callers changed.
(display, timeout, convert, checkfinal, iffy):
Don't assume that localtime and gmtime succeed.
This prevents a core dump for, e.g., 'date -r 0xffffffffffffffff'.
* private.h: Include float.h.
(strtoimax): New macro, for pre-C99 systems that lack strtoimax.
(time_t_min, time_t_max): New constants, from zdump, with
different names to avoid a clash when zdump.c includes private.h.
(tmcomp): Don't mess up when atmp->tm_year - btmp->tm_year overflows.
This can happen when mktime is invoked on a struct tm with tm_year
equal to INT_MIN.
See the thread starting with Clive D.W. Feather's comments in
<http://mm.icann.org/pipermail/tz/2013-August/019496.html>.
* localtime.c (truncate_time): Don't bother with uintmax_t,
as using it doesn't help on any known platform.
* private.h (UINTMAX_MAX): Remove.
Problem reported by Alois Treindl in
<http://mm.icann.org/pipermail/tz/2013-August/019493.html>.
* localtime.c (truncate_time): New function.
(localsub): Use it to avoid undefined behavior on integer overflow.
* private.h (INTMAX_MAX, INTMAX_MIN, UINTMAX_MAX):
New macros, for older platforms that lack them.
* localtime.c (offtime, timeoff, gtime): Revert change to ABI, by
going back to 'long' instead of 'int_fast32_t' for types accepted
and returned by extern functions. Reported by Christos Zoulas in
<http://mm.icann.org/pipermail/tz/2013-July/019488.html>.
* tz-link.htm: Add commentary section. Update URLs and titles.
Add links to Firefox OS, Bill Seymour's intro, Jon Udell's appreciation,
W3C's "Working with Time Zones".
I audited the code and fixed as many width-asssumptions as I could
find, including several places where the code assumed that 'time_t'
was no wider than 'long'; this assumption is not true on 32-bit
NetBSD platforms. This caught every problem that is already fixed
in the NetBSD zic.c, and caught quite a few more.
* Makefile: Add comments re HAVE_DOS_FILE_NAMES and HAVE_INTTYPES_H.
* date.c (checkfinal, netsettime): Don't use 'long' where 'int' will do.
* difftime.c (difftime): Mark with ATTRIBUTE_CONST.
Use uintmax_t, not unsigned long, for the widest unsigned integer type.
Use long double, not double, if time_t is wider than uintmax_t;
this can in theory help on nonstandard platforms, such as GCC
with 64-bit uintmax_t and 128-bit __int128_t.
* localtime.c (struct ttinfo.tt_gmtoff, struct rule.r_time)
(detzcode, getsecs, getoffset, gmtsub, localsub, increment_overflow32)
(normalize_overflow32, time1, time2, timesub, transtime, tzparse)
(time2sub, timeoff, gtime):
* tzfile.h (SECSPERDAY):
* zdump.c (SECSPERDAY):
* zic.c (convert, puttzcode):
Use int_fast32_t, not long, when all we care is that values up to
2**31 can be stored. This doesn't fix any bugs, but it allows
more opportunity for compiler optimization.
(struct lsinfo.ls_corr, timesub, leapcorr):
Use int_fast64_t, not long, when values up to 2**63 can be stored.
(timesub): Make it clearer when we are truncating 0.5 to 0.
(increment_overflow32): Rename from long_increment_overflow.
All uses changed.
(normalize_overflow32): Rename from long_normalize_overflow.
All uses changed.
* private.h (HAVE_INTTYPES_H, ATTRIBUTE_CONST): New macros.
Include <inttypes.h> if HAVE_INTTYPES_H.
(INT_FAST64_MIN, INT_FAST64_MAX, SCNdFAST64, int_fast32_t, PRIdMAX)
(uintmax_t, PRIuMAX, _Noreturn):
Define to reasonable values if it's an older compiler.
* scheck.c (scheck): Add support for arbitrary formats, such as
those that SCNdFAST64 can expand to, at the price of no longer
supporting weird conversion specs like "%[%]".
* strftime.c (_fmt): Use intmax_t and uintmax_t to format time_t,
not long and unsigned long.
* zdump.c (int_fast32_t, intmax_t, PRIdMAX, SCNdMAX):
Define for pre-C99 compilers, like private.h does.
(delta, yeartot, main): Use intmax_t, not long.
(hunt): Use time_t, not long, since the diff must be nonnegative.
(tformat): Allow for time_t wider than long.
* zic.c (ZIC_MIN, ZIC_MAX, SCNdZIC): New macros.
(OFFSET_STRLEN_MAXIMUM, RULE_STRLEN_MAXIMUM): Remove.
(struct rule): Make r_loyear, r_hiyear, r_tod, r_stdoff, z_gmtoff,
z_stdoff zic_t, not long.
(addtype, gethms, oadd, rpytime, tadd, gmtoffs, corr, inleap)
(stringoffset, stringrule, outzone, addtype, adjleap, rpytime)
(LDAYSPERWEEK):
Use zic_t, not long.
(leapminyear, leapmaxyear, min_year, max_year, rulesub, updateminmax)
(outzone, rpytime):
Use zic_t, not int.
(usage): Now _Noreturn.
(main): Use S_IWGRP, not 'unix', to determine whether to call umask.
(writezone): Omit unnecessary cast.
(mkdirs): Use HAVE_DOS_FILE_NAMES, not 'unix', to determine
whether to parse DOS file anmes.
(eitol): Remove; no longer needed.
This change stemmed from a long discussion on the tz mailing list
about what country the Jerusalem zone entry is in. The idea of
this change is to deemphasize the role of countries in the tz
database, to lessen the amount of controversy in the future.
Due to backward compatibility concerns this change does not eliminate
the role of countries entirely. With one minor exception this
change does not alter any code or data, just comments.
* Theory, zone.tab: Deemphasize the role of countries in choosing
location names, as they tend to introduce political conflict
during maintenance, and country information isn't needed for
typical uses of the database.
* Theory: Say that names should differ in more than just case, and why;
and explain why 'backward' means old names will continue to work.
(thanks to Norbert Lindenberg for spotting these issues).
Update citation date and URL.
* iso3166.tab: Mention latest maintenance update.
Update citation URL. Add missing comma for BQ.
Be more consistent about abbreviating Sint like Saint.
Mention SX "Dutch part" for consistency with MF "French part".
* iso3166.tab, zone.tab: Add legal/territorial disclaimer.
* zone.tab: Say that country/zone overlaps can occur in both
directions, and that column 2 need not lie within column 1.
(Asia/Jerusalem): Change the coordinates from a sloppy value,
taken from an old astrology book, to a more-precise value, the
site of city hall. The sloppy value sparked some controversy and
the hope is that the more-precise value will be a bit less
controversial.
* Makefile (TIME_T_ALTERNATIVES): New macro.
(check_time_t_alternatives, clean_misc): New rules.
(clean): Split out into clean_misc and removing tzpublic.
(public): Add check_time_t.
This makes it easier to test on (say) Debian, even if we're
testing the time_t type on (say) NetBSD. NetBSD uses 64-bit
time_t on 32-bit hosts, and this lets us test a NetBSD-style
implementation (32-bit 'long', 64-bit time_t) on a 32-bit Debian host.
* Makefile: Update comments to talk about TIME_T_FLOATING and time_tz.
Sort the comments.
* private.h (restrict): Define to empty with older compilers.
'restrict' is now needed, to define gmtime_r and localtime_r in
standard ways when time_tz is defined.
Make the following changes if time_tz is defined:
(sys_time, time): New static functions. The former is the system
'time' function that applies to the system time_t, the latter
our function that applies to our time_t.
(time_t, ctime, ctime_r, difftime, gmtime, gmtime_r, localtime)
(localtime_r, mktime): Rename to tz_time_t, tz_ctime, etc.,
via macros. Declare the renamed versions.
* zdump.8: Document new options -V, -t.
* zdump.c: Include private.h if time_tz is defined.
(INITIALIZE): Remove; no longer needed.
(absolute_min_time, absolute_max_time): Work even if time_t
is wider than intmax_t, which can be true with GCC and __int128_t.
Use the new TIME_T_FLOATING macro for this.
(usage): Document new flags.
(main): Support them.
Also, sort Macquarie more-consistently with other parts of Australia.
This doesn't affect time stamps, just zone selection.
Problems reported by Tim Parenti in
<http://mm.icann.org/pipermail/tz/2013-April/019060.html>.
* australasia (Antarctica/Macquarie): Tasmania Parks & Wildlife Service
history indicates that permanent habitation was 1899-1918 and 1948 on.
* zone.tab (Antarctica/Macquarie): Move next to Lord Howe and Tasmania.
This doesn't affect time stamps, just zone selection.
Problem reported by Tobias Conradi in
<http://mm.icann.org/pipermail/tz/2013-April/019023.html>.
* antarctica (AusAQ, ATAQ): Remove; no longer needed.
* australasia (Antarctica/Macquarie): Move here from
the 'antarctica' file. Use Aus and AT rather than
AusAQ and ATAQ.
* zone.tab (Antarctica/Macquarie): Country code AU, not AQ.
Thanks to Steffen Thorsen, in
<http://mm.icann.org/pipermail/tz/2013-March/018812.html>.
An earlier version of this patch was mistaken.
Thanks to Petr Machata for reporting some of the bugs, in
<http://mm.icann.org/pipermail/tz/2013-March/018814.html>.
* asia (Palestine, Asia/Gaza, Asia/Hebron): Incorporates the latest info
from timeanddate.com about Palestine. When combined with the previous
(incorrect) patch this incorporates the following changes for Gaza and
Hebron:
The spring 2008 change in Gaza and Hebron was on 00:00 Mar 28, not
00:00 Apr 1.
The fall 2009 change in Gaza and Hebron on Sep 4 was at 01:00, not
02:00.
The spring 2010 change in Hebron was 00:00 Mar 26, not 00:01 Mar 27.
timeanddate.com's table says 02:00, but the text at
<http://www.timeanddate.com/news/time/gaza-and-west-bank-dst-2010.html>
says 00:00.
The spring 2011 change in Gaza was 00:01 Apr 1, not 12:01 Apr 2.
timeanddate's table says 00:00, but the text at
<http://www.timeanddate.com/news/time/west-bank-starts-dst-2011.html>
says 00:01.
The spring 2011 change in Hebron on Apr 1 was at 00:01, not 12:01.
The fall 2011 change in Hebron on Sep 30 was at 00:00, not 03:00.
From 2013 on, Gaza and Hebron both observe DST, with the predicted
rules being the last Thursday in March at 24:00 to the first Friday on
or after September 21 at 01:00.
Thanks to Steffen Thorsen, in
<http://mm.icann.org/pipermail/tz/2013-March/018812.html>.
* asia (Palestine): Add rules for 2011 on, to simplify Gaza and Hebron.
Adjust to recently announced changed.
(Asia/Gaza, Asia/Hebron): Use adjusted rules.
* tz-link.htm: Add URLs for webOS, BB10, iOS. Update URL for Solaris.
Mention Internet RFC 6557. Update Internet RFCs 2445->5545,
2822->5322. Switch from FTP to HTTP for Internet RFCs.
The source is: Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
<http://www.jstor.org/stable/1774359>.
* africa (Africa/Gaborone, Africa/Cairo):
* asia (Asia/Rangoon, Asia/Shanghai, Asia/Hong_Kong, Asia/Aden):
* australasia (Pacific/Fiji):
* europe (Europe/Vienna):
* northamerica (America/Nassau, America/Barbados, Atlantic/Bermuda)
(America/Costa_Rica):
* southamerica (America/Bogota, America/Curacao):
Adjust old time stamps to match Milne. I went going through
Milne's list one by one and did not finish, but the rest can be
done later.
* zic.c (stringoffset): Allow 24:00. POSIX.1-2008 allows 24:00,
even though older versions of POSIX maxed out at 23:59:59.
Patch from Arthur David Olson.
* southamerica: Rewrite to avoid the need for Latin-1 bytes.
Perhaps someday we should allow non-ASCII characters in commentary,
but if we do so we should use UTF-8. Reported by Andy Heninger in
<http://mm.icann.org/pipermail/tz/2012-December/018480.html>.
Based on a patch by Joseph S. Myers in
<http://mm.icann.org/pipermail/tz/2012-November/018452.html>.
* Makefile (BUGEMAIL): New macro.
(version.h, tzselect): Use it to define REPORT_BUGS_TO.
* tzselect.ksh (REPORT_BUGS_TO): New variable, used for --help.
* zdump.c, zic.c (usage): Use REPORT_BUGS_TO for --help.
* tz-link.htm: Prune no-longer-working URLs, update URLs that got
moved, sort a bit. The most-important casualty is the Norwegian
Meteorological Institute's web page for Summer time in Norway,
formerly at <http://met.no/met/met_lex/q_u/sommertid.html>: it's
no longer there and I can't find out where it moved to, if
anywhere.
* tzfile.5: Fix minor grammar problem.
* africa (Libya, Africa/Tripoli): Libya switched to CET
on 2012-11-10 at 02:00, and plans to switch to CEST
Mar lastFri 1:00 and switch back Oct lastFri 2:00.
Thanks to Even Scharning, Steffen Thorsen, and Tim Parenti,
with the thread starting in
<http://mm.icann.org/pipermail/tz/2012-November/018449.html>.
E.g., "zic (tzcode) 2012i" instead of "tzcode2012i".
Thread started by Joseph S. Myers in
<http://mm.icann.org/pipermail/tz/2012-November/018439.html>.
* Makefile (PACKAGE): New macro.
(version.h, tzselect): New constant PKGVERSION, derived from PACKAGE.
(tzselect): TZVERSION is now simply VERSION, since PACKAGE is also
output.
* tzselect.ksh (PKGVERSION): New var, which Makefile substitutes for.
(--usage, --version): Exit with nonzero status if we can't
output the help or version number.
* tzselect.ksh (--version):
* zdump.c, zic.c (main):
Output versions like this: "zdump (tzcode) 2012i".
* africa, australasia, europe, northamerica, southamerica:
* tzselect.ksh, zdump.c, zic.c:
In commentary and strings, change email address from
tz@elsie.nci.nih.gov to tz@iana.org, as the old email address
no longer works.
This fixes a bunch of "time zone abbreviation has more than 3
alphabetics" diagnostics for 'make check_public'.
* zic.c (newabbr): Check for <3 alphabetics, not for >3.
POSIX-2008 requires at least 3 and says that it's not portable to
use more than 6, which we check elsewhere.
* Makefile (ZFLAGS): Remove obsolete comment.
(check_public): Put temporary directory under this directory, not
under /tmp, as that's better if one is doing multiple builds in
parallel. Also, use the just-built zic rather than the system zic.
(clean): Remove temporary directory.
* Makefile (maintainer-clean): Clean *.asc files and *.tar.gz files.
(signatures): Use .asc instead of .sign as the extension for signatures
as this works better with other software. Reported by Phil Pennock.
* .gitignore: Also ignore .asc files.
* Makefile (public): Rewrite in terms of new rules, below.
(check_public): New rule, containing the old checking part of
'make public'.
(tarballs): New rule, containing the old tarball-making part of
'make public'. Do not run checktab twice.
(signatures, tzcode$(VERSION).tar.gz.sign, tzdata$(VERSION).tar.gz.sign):
New rules.
* Makefile (KSHELL): New macro.
(tzselect): Use it.
* tzselect.ksh: Use "#!/bin/bash", not "#! /bin/ksh". The Makefile
can override this. No need for a space after "!'; that was put in
years ago only because of an urban legend.
* Makefile (LDFLAGS): Rename from LFLAGS, with backwards compatibility.
All uses changed. Suggested by Mike Frysinger in
<http://mm.icann.org/pipermail/tz/2012-October/018396.html>.
(zdump, zic, date): Use $(CC) -o $@ ... rather than $(CC) ... -o $@,
for portability to strict older POSIX hosts.
($(TZLIB)): Don't use [ ... -o ... ], as it's not portable.
* tz-link.htm (DC.Identifier): Move canonical location to cs.ucla.edu.
Move public-domains and corrections notices to <address>.
Update some URLs. Add Android. Mac OS X has been renamed to OS X.
* Makefile (VERSION): Increase to 2012g.
(COMMON): New macro.
(DOCS): Remove Makefile.
(ENCHILADA): Adjust to above changes.
(public): Put $(COMMON) in both tarballs, so that the version
number is in both distributions.
* australasia (WS): New rule.
(Pacific/Apia): Use it, for new DST rules for Western Samoa.
Thanks to Nicholas Pereira for the heads-up and to Robert Elz
for coding up the rules.
* Makefile (VERSION): New macro, superseding ...
(TZCODE_VERSION, TZDATA_VERSION): Remove. All uses changed.
(version.h): Call the variable TZVERSION, not TZCODE_VERSION.
All uses changed.
(tzselect): Interpolate TZVERSION, not TZCODE_VERSION.
(public): Adjust to new versioning scheme.
* tzselect.ksh (TZVERSION): Rename from TZCODE_VERSION.
* zdump.c, zic.c (main): Use TZVERSION, not TZCODE_VERSION.
* Makefile (TZCODE_VERSION): Increase to tzcode2012c.
(TZDATA_VERSION, GNUTARFLAGS, TARFLAGS, GZIPFLAGS): New macros.
(maintainer-clean): Remove all the old tar.gz files.
(set-timestamps): New rule.
(public): Use it. Create distribution files that are more
reproducible, by omitting irrelevant information such as the time
of checkout or build, the builder's user name, the builder's
locale, and so forth. Be more careful about file permissions in /tmp.
Paul Eggert