Changes in Theory

20e5bd1924b7eda89cc68214bea437e4243827b0 - merge 2017a

Sat, 11 Mar 2017 18:23:14 +0000

merge 2017a List of files: /netbsd-src/lib/libc/time/Theory

af580f3ad2f1146a7aa5c9805f85c200cafe67f4 - welcome to 2016h

Thu, 20 Oct 2016 17:41:34 +0000

welcome to 2016h List of files: /netbsd-src/lib/libc/time/Theory

9551d334d2110f76261163121b4d658c9a6fe0c8 - merge tzcode2016g

Fri, 07 Oct 2016 15:29:42 +0000

merge tzcode2016g List of files: /netbsd-src/lib/libc/time/Theory

16bd23da7ab34cf013477dee04251a6607fae890 - welcome to tzcond-2016f

Fri, 16 Sep 2016 17:12:06 +0000

welcome to tzcond-2016f List of files: /netbsd-src/lib/libc/time/Theory

e4c8546a4ca727bdaf7244fd2d831646b3e696dd - Sync with 2016b

Tue, 15 Mar 2016 15:16:01 +0000

Sync with 2016b List of files: /netbsd-src/lib/libc/time/Theory

d856f74aad8271c22680c41d42a9a7170d20a57d - merge 2015f

Thu, 13 Aug 2015 11:21:18 +0000

merge 2015f List of files: /netbsd-src/lib/libc/time/Theory

aa771cb9707001dd5c46048678750ae37607ae05 - merge 2015b

Tue, 24 Mar 2015 20:01:18 +0000

merge 2015b List of files: /netbsd-src/lib/libc/time/Theory

1f6103b1793c8849f3a9ed017512de8b0a77e070 - Sync with tzcode2014h

Tue, 07 Oct 2014 21:51:03 +0000

Sync with tzcode2014h List of files: /netbsd-src/lib/libc/time/Theory

3ad51082af69c66b223673da38014fecb2345337 - merge tzcode2014f via patch

Fri, 15 Aug 2014 11:04:07 +0000

merge tzcode2014f via patch List of files: /netbsd-src/lib/libc/time/Theory

33d9f9e08d3535053feb424293a0e5a0f9b39650 - Welcome to tzcode 2013e:

Fri, 20 Sep 2013 19:06:54 +0000

Welcome to tzcode 2013e: Changes affecting API The 'zic' command now outputs a dummy transition when far-future data can't be summarized using a TZ string, and uses a 402-year window rather than a 400-year window. For the current data, this affects only the Asia/Tehran file. It does not affect any of the time stamps that this file represents, so zdump outputs the same information as before. (Thanks to Andrew Main (Zefram).) The 'date' command has a new '-r' option, which lets you specify the integer time to display, a la FreeBSD. The 'tzselect' command has two new options '-c' and '-n', which lets you select a zone based on latitude and longitude. The 'zic' command's '-v' option now warns about constructs that require the new version-3 binary file format. (Thanks to Arthur David Olson for the suggestion.) Support for floating-point time_t has been removed. It was always dicey, and POSIX no longer requires it. (Thanks to Eric Blake for suggesting to the POSIX committee to remove it, and thanks to Alan Barrett, Clive D.W. Feather, Andy Heninger, Arthur David Olson, and Alois Treindl, for reporting bugs and elucidating some of the corners of the old floating-point implementation.) The signatures of 'offtime', 'timeoff', and 'gtime' have been changed back to the old practice of using 'long' to represent UT offsets. This had been inadvertently and mistakenly changed to 'int_fast32_t'. (Thanks to Christos Zoulos.) The code avoids undefined behavior on integer overflow in some more places, including gmtime, localtime, mktime and zdump. Changes affecting the zdump utility zdump now outputs "UT" when referring to Universal Time, not "UTC". "UTC" does not make sense for time stamps that predate the introduction of UTC, whereas "UT", a more-generic term, does. (Thanks to Steve Allen for clarifying UT vs UTC.) Data changes affecting behavior of tzselect and similar programs Country code BQ is now called the more-common name "Caribbean Netherlands" rather than the more-official "Bonaire, St Eustatius & Saba". Remove from zone.tab the names America/Montreal, America/Shiprock, and Antarctica/South_Pole, as they are equivalent to existing same-country-code zones for post-1970 time stamps. The data for these names are unchanged, so the names continue to work as before. Changes affecting code internals zic -c now runs way faster on 64-bit hosts when given large numbers. zic now uses vfprintf to avoid allocating and freeing some memory. tzselect now computes the list of continents from the data, rather than have it hard-coded. Minor changes pacify GCC 4.7.3 and GCC 4.8.1. Changes affecting the build procedure The 'leapseconds' file is now generated automatically from a new file 'leap-seconds.list', which is a copy of . A new source file 'leapseconds.awk' implements this. The goal is simplification of the future maintenance of 'leapseconds'. When building the 'posix' or 'right' subdirectories, if the subdirectory would be a copy of the default subdirectory, it is now made a symbolic link if that is supported. This saves about 2 MB of file system space. The links America/Shiprock and Antarctica/South_Pole have been moved to the 'backward' file. This affects only nondefault builds that omit 'backward'. Changes affecting documentation and commentary Changes to the 'tzfile' man page It now mentions that the binary file format may be extended in future versions by appending data. It now refers to the 'zdump' and 'zic' man pages. Changes to the 'zic' man page It lists conditions that elicit a warning with '-v'. It says that the behavior is unspecified when duplicate names are given, or if the source of one link is the target of another. Its examples are updated to match the latest data. The definition of white space has been clarified slightly. (Thanks to Michael Deckers.) Changes to the 'Theory' file There is a new section about the accuracy of the tz database, describing the many ways that errors can creep in, and explaining why so many of the pre-1970 time stamps are wrong or misleading (thanks to Steve Allen, Lester Caine, and Garrett Wollman for discussions that contributed to this). The 'Theory' file describes LMT better (this follows a suggestion by Guy Harris). It refers to the 2013 edition of POSIX rather than the 2004 edition. It's mentioned that excluding 'backward' should not affect the other data, and it suggests at least one zone.tab name per inhabited country (thanks to Stephen Colebourne). Some longstanding restrictions on names are documented, e.g., 'America/New_York' precludes 'America/New_York/Bronx'. It gives more reasons for the 1970 cutoff. It now mentions which time_t variants are supported, such as signed integer time_t. (Thanks to Paul Goyette for reporting typos in an experimental version of this change.) (Thanks to Philip Newton for correcting typos in these changes.) Documentation and commentary is more careful to distinguish UT in general from UTC in particular. (Thanks to Steve Allen.) Add a better source for the Zurich 1894 transition. (Thanks to Pierre-Yves Berger.) Update shapefile citations in tz-link.htm. (Thanks to Guy Harris.) List of files: /netbsd-src/lib/libc/time/Theory

a37624b5b01507eb84c9347435f8fba3e9a6c078 - welcome to 2013d

Wed, 17 Jul 2013 20:13:04 +0000

welcome to 2013d List of files: /netbsd-src/lib/libc/time/Theory

2f573b07f7a2bf2dce29099f131795d8cfc330df - welcome to tzcode2012h via patch.

Sun, 28 Oct 2012 17:11:33 +0000

welcome to tzcode2012h via patch. List of files: /netbsd-src/lib/libc/time/Theory

b6be6961a75120d375bac8b29ede1d3ee3c8ae7b - merge 2012e

Thu, 09 Aug 2012 12:38:25 +0000

merge 2012e List of files: /netbsd-src/lib/libc/time/Theory

a61b0b2ed7ecf762d0f97147c94a0248bdb00635 - bring in the 2011i changes.

Sun, 04 Sep 2011 10:10:26 +0000

bring in the 2011i changes. List of files: /netbsd-src/lib/libc/time/Theory

86162a51cc90f4129d10b7466592fefe8d2bc1ff - Import tzcode2009k.

Thu, 31 Dec 2009 22:49:15 +0000

Import tzcode2009k.- now understands 64bit time_t and 64bit data in timezone files.- localtime(), gmtime(), asctime() and ctime() may now fail with a NULL result if time_t cannot be represented by struct tm. List of files: /netbsd-src/lib/libc/time/Theory

8bd97363d646b7417667ab95329cf6590bd4b431 - Merge tzcode2004a.

Thu, 27 May 2004 20:39:49 +0000

Merge tzcode2004a. List of files: /netbsd-src/lib/libc/time/Theory

84a2a5ca6e74f25a8be36578167e57bc16d897a1 - Merge tzcode2003e.

Sat, 20 Dec 2003 00:12:05 +0000

Merge tzcode2003e. List of files: /netbsd-src/lib/libc/time/Theory

4521dc7de475753ef28c798aebe956d0ff73f975 - Merge tzcode2002b.

Tue, 29 Jan 2002 12:40:33 +0000

Merge tzcode2002b. List of files: /netbsd-src/lib/libc/time/Theory

b883dd18d13e644ee237d62e3740f79e2c1b468c - Merge tzcode2000g.

Tue, 12 Dec 2000 15:25:41 +0000

Merge tzcode2000g. List of files: /netbsd-src/lib/libc/time/Theory

ae7e338dbb981c5997c9c096e778aa28fe21023e - Merge tzcode1999h.

Wed, 10 Nov 1999 20:32:30 +0000

Merge tzcode1999h. List of files: /netbsd-src/lib/libc/time/Theory