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[src/trunk]: src/lib/libc/time merge 2017a
details: https://anonhg.NetBSD.org/src/rev/34cfee0952a0
branches: trunk
changeset: 822293:34cfee0952a0
user: christos <christos%NetBSD.org@localhost>
date: Sat Mar 11 18:23:14 2017 +0000
description:
merge 2017a
diffstat:
lib/libc/time/CONTRIBUTING | 6 +-
lib/libc/time/Makefile | 18 +-
lib/libc/time/NEWS | 265 +++++++++++++++++++++++++++++++++++---------
lib/libc/time/README | 25 +---
lib/libc/time/Theory | 62 +++++++--
lib/libc/time/asctime.c | 5 +-
lib/libc/time/localtime.c | 71 ++++++++---
lib/libc/time/private.h | 98 +++++++++++-----
lib/libc/time/strftime.3 | 10 +-
lib/libc/time/strftime.c | 24 ++-
lib/libc/time/tz-art.htm | 37 ++++-
lib/libc/time/tz-link.htm | 115 +++++++++++--------
lib/libc/time/version | 2 +-
lib/libc/time/zdump.8 | 9 +-
lib/libc/time/zdump.c | 225 ++-----------------------------------
lib/libc/time/zic.c | 98 ++++++++++-----
16 files changed, 592 insertions(+), 478 deletions(-)
diffs (truncated from 2167 to 300 lines):
diff -r edf0d427f65a -r 34cfee0952a0 lib/libc/time/CONTRIBUTING
--- a/lib/libc/time/CONTRIBUTING Sat Mar 11 16:36:01 2017 +0000
+++ b/lib/libc/time/CONTRIBUTING Sat Mar 11 18:23:14 2017 +0000
@@ -18,10 +18,10 @@
justification.
Please submit changes against either the latest release in
-<ftp://ftp.iana.org/tz/> or the master branch of the experimental
-Git repository. If you use Git the following workflow may be helpful:
+<ftp://ftp.iana.org/tz/> or the master branch of the development
+repository. If you use Git the following workflow may be helpful:
- * Copy the experimental repository.
+ * Copy the development repository.
git clone https://github.com/eggert/tz.git
cd tz
diff -r edf0d427f65a -r 34cfee0952a0 lib/libc/time/Makefile
--- a/lib/libc/time/Makefile Sat Mar 11 16:36:01 2017 +0000
+++ b/lib/libc/time/Makefile Sat Mar 11 18:23:14 2017 +0000
@@ -72,11 +72,11 @@
LIBDIR= $(TOPDIR)/lib
-# If you always want time values interpreted as "seconds since the epoch
-# (not counting leap seconds)", use
+# If you want only POSIX time, with time values interpreted as
+# seconds since the epoch (not counting leap seconds), use
# REDO= posix_only
-# below. If you always want right time values interpreted as "seconds since
-# the epoch" (counting leap seconds)", use
+# below. If you want want only "right" time, with values interpreted
+# as seconds since the epoch (counting leap seconds), use
# REDO= right_only
# below. If you want both sets of data available, with leap seconds not
# counted normally, use
@@ -85,7 +85,10 @@
# normally, use
# REDO= right_posix
# below. POSIX mandates that leap seconds not be counted; for compatibility
-# with it, use "posix_only" or "posix_right".
+# with it, use "posix_only" or "posix_right". Use POSIX time on systems with
+# leap smearing; this can work better than unsmeared "right" time with
+# applications that are not leap second aware, and is closer to unsmeared
+# "right" time than unsmeared POSIX time is (e.g., 0.5 vs 1.0 s max error).
REDO= posix_right
@@ -166,7 +169,7 @@
-Wshadow -Wstrict-prototypes -Wsuggest-attribute=const \
-Wsuggest-attribute=format -Wsuggest-attribute=noreturn \
-Wsuggest-attribute=pure -Wtrampolines \
- -Wunused -Wwrite-strings \
+ -Wundef -Wunused -Wwrite-strings \
-Wno-address -Wno-format-nonliteral -Wno-sign-compare \
-Wno-type-limits -Wno-unused-parameter
#
@@ -543,7 +546,8 @@
cp $(TZS_NEW) $(TZS)
libtz.a: $(LIBOBJS)
- $(AR) ru $@ $(LIBOBJS)
+ rm -f $@
+ $(AR) -rc $@ $(LIBOBJS)
$(RANLIB) $@
date: $(DATEOBJS)
diff -r edf0d427f65a -r 34cfee0952a0 lib/libc/time/NEWS
--- a/lib/libc/time/NEWS Sat Mar 11 16:36:01 2017 +0000
+++ b/lib/libc/time/NEWS Sat Mar 11 18:23:14 2017 +0000
@@ -1,5 +1,154 @@
News for the tz database
+Release 2017a - 2017-02-28 00:05:36 -0800
+
+ Briefly: Southern Chile moves from -04/-03 to -03, and Mongolia
+ discontinues DST.
+
+ Changes to future time stamps
+
+ Mongolia no longer observes DST. (Thanks to Ganbold Tsagaankhuu.)
+
+ Chile's Region of Magallanes moves from -04/-03 to -03 year-round.
+ Its clocks diverge from America/Santiago starting 2017-05-13 at
+ 23:00, hiving off a new zone America/Punta_Arenas. Although the
+ Chilean government says this change expires in May 2019, for now
+ assume it's permanent. (Thanks to Juan Correa and Deborah
+ Goldsmith.) This also affects Antarctica/Palmer.
+
+ Changes to past time stamps
+
+ Fix many entries for historical time stamps for Europe/Madrid
+ before 1979, to agree with tables compiled by Pere Planesas of the
+ National Astronomical Observatory of Spain. As a side effect,
+ this changes some time stamps for Africa/Ceuta before 1929, which
+ are probably guesswork anyway. (Thanks to Steve Allen and
+ Pierpaolo Bernardi for the heads-ups, and to Michael Deckers for
+ correcting the 1901 transition.)
+
+ Ecuador observed DST from 1992-11-28 to 1993-02-05.
+ (Thanks to Alois Treindl.)
+
+ Asia/Atyrau and Asia/Oral were at +03 (not +04) before 1930-06-21.
+ (Thanks to Stepan Golosunov.)
+
+ Changes to past and future time zone abbreviations
+
+ Switch to numeric time zone abbreviations for South America, as
+ part of the ongoing project of removing invented abbreviations.
+ This avoids the need to invent an abbreviation for the new Chilean
+ new zone. Similarly, switch from invented to numeric time zone
+ abbreviations for Afghanistan, American Samoa, the Azores,
+ Bangladesh, Bhutan, the British Indian Ocean Territory, Brunei,
+ Cape Verde, Chatham Is, Christmas I, Cocos (Keeling) Is, Cook Is,
+ Dubai, East Timor, Eucla, Fiji, French Polynesia, Greenland,
+ Indochina, Iran, Iraq, Kiribati, Lord Howe, Macquarie, Malaysia,
+ the Maldives, Marshall Is, Mauritius, Micronesia, Mongolia,
+ Myanmar, Nauru, Nepal, New Caledonia, Niue, Norfolk I, Palau,
+ Papua New Guinea, the Philippines, Pitcairn, Qatar, Réunion, St
+ Pierre & Miquelon, Samoa, Saudi Arabia, Seychelles, Singapore,
+ Solomon Is, Tokelau, Tuvalu, Wake, Vanuatu, Wallis & Futuna, and
+ Xinjiang; for 20-minute daylight saving time in Ghana before 1943;
+ for half-hour daylight saving time in Belize before 1944 and in
+ the Dominican Republic before 1975; and for Canary Islands before
+ 1946, for Guinea-Bissau before 1975, for Iceland before 1969, for
+ Indian Summer Time before 1942, for Indonesia before around 1964,
+ for Kenya before 1960, for Liberia before 1973, for Madeira before
+ 1967, for Namibia before 1943, for the Netherlands in 1937-9, for
+ Pakistan before 1971, for Western Sahara before 1977, and for
+ Zaporozhye in 1880-1924.
+
+ For Alaska time from 1900 through 1967, instead of "CAT" use the
+ abbreviation "AST", the abbreviation commonly used at the time
+ (Atlantic Standard Time had not been standardized yet). Use "AWT"
+ and "APT" instead of the invented abbreviations "CAWT" and "CAPT".
+
+ Use "CST" and "CDT" instead of invented abbreviations for Macau
+ before 1999 and Taiwan before 1938, and use "JST" instead of the
+ invented abbreviation "JCST" for Japan and Korea before 1938.
+
+ Change to database entry category
+
+ Move the Pacific/Johnston link from 'australasia' to 'backward',
+ since Johnston is now uninhabited.
+
+ Changes to code
+
+ zic no longer mishandles some transitions in January 2038 when it
+ attempts to work around Qt bug 53071. This fixes a bug affecting
+ Pacific/Tongatapu that was introduced in zic 2016e. localtime.c
+ now contains a workaround, useful when loading a file generated by
+ a buggy zic. (Problem and localtime.c fix reported by Bradley
+ White.)
+
+ zdump -i now outputs non-hour numeric time zone abbreviations
+ without a colon, e.g., "+0530" rather than "+05:30". This agrees
+ with zic %z and with common practice, and simplifies auditing of
+ zdump output.
+
+ zdump is now buildable again with -DUSE_LTZ=0.
+ (Problem reported by Joseph Myers.)
+
+ zdump.c now always includes private.h, to avoid code duplication
+ with private.h. (Problem reported by Kees Dekker.)
+
+ localtime.c no longer mishandles early or late timestamps
+ when TZ is set to a POSIX-style string that specifies DST.
+ (Problem reported by Kees Dekker.)
+
+ date and strftime now cause %z to generate "-0000" instead of
+ "+0000" when the UT offset is zero and the time zone abbreviation
+ begins with "-".
+
+ Changes to documentation and commentary
+
+ The 'Theory' file now better documents choice of historical time
+ zone abbreviations. (Problems reported by Michael Deckers.)
+
+ tz-link.htm now covers leap smearing, which is popular in clouds.
+
+
+Release 2016j - 2016-11-22 23:17:13 -0800
+
+ Briefly: Saratov, Russia moves from +03 to +04 on 2016-12-04.
+
+ Changes to future time stamps
+
+ Saratov, Russia switches from +03 to +04 on 2016-12-04 at 02:00.
+ This hives off a new zone Europe/Saratov from Europe/Volgograd.
+ (Thanks to Yuri Konotopov and Stepan Golosunov.)
+
+ Changes to past time stamps
+
+ The new zone Asia/Atyrau for Atyraū Region, Kazakhstan, is like
+ Asia/Aqtau except it switched from +05/+06 to +04/+05 in spring
+ 1999, not fall 1994. (Thanks to Stepan Golosunov.)
+
+ Changes to past time zone abbreviations
+
+ Asia/Gaza and Asia/Hebron now use "EEST", not "EET", to denote
+ summer time before 1948. The old use of "EET" was a typo.
+
+ Changes to code
+
+ zic no longer mishandles file systems that lack hard links, fixing
+ bugs introduced in 2016g. (Problems reported by Tom Lane.)
+ Also, when the destination already contains symbolic links, zic
+ should now work better on systems where the 'link' system call
+ does not follow symbolic links.
+
+ Changes to documentation and commentary
+
+ tz-link.htm now documents the relationship between release version
+ numbers and development-repository commit tags. (Suggested by
+ Paul Koning.)
+
+ The 'Theory' file now documents UT.
+
+ iso3166.tab now accents "Curaçao", and commentary now mentions
+ the names "Cabo Verde" and "Czechia". (Thanks to JiÅ?à BoháÄ?.)
+
+
Release 2016i - 2016-11-01 23:19:52 -0700
Briefly: Cyprus split into two time zones on 2016-10-30, and Tonga
@@ -212,7 +361,7 @@
23 commits and some working-file changes have been made since
release 2016g, the version number is now something like
'2016g-23-g50556e3-dirty' instead of the misleading '2016g'.
- Official releases uses the same version number format as before,
+ Tagged releases use the same version number format as before,
e.g., '2016g'. To support the more-accurate version number, its
specification has moved from a line in the Makefile to a new
source file 'version'.
@@ -870,16 +1019,16 @@
been fixed. (Thanks to Christos Zoulas for reporting most of
these problems and for suggesting fixes.)
- If USG_COMPAT is defined and the requested time stamp is standard time,
+ If USG_COMPAT is defined and the requested timestamp is standard time,
the tz library's localtime and mktime functions now set the extern
- variable timezone to a value appropriate for that time stamp; and
+ variable timezone to a value appropriate for that timestamp; and
similarly for ALTZONE, daylight saving time, and the altzone variable.
This change is a companion to the tzname change in 2014h, and is
designed to make timezone and altzone more compatible with tzname.
The tz library's functions now set errno to EOVERFLOW if they fail
because the result cannot be represented. ctime and ctime_r now
- return NULL and set errno when a time stamp is out of range, rather
+ return NULL and set errno when a timestamp is out of range, rather
than having undefined behavior.
Some bugs associated with the new 2014g functions have been fixed.
@@ -896,7 +1045,7 @@
Release 2014h - 2014-09-25 18:59:03 -0700
- Changes affecting past time stamps
+ Changes affecting past timestamps
America/Jamaica's 1974 spring-forward transition was Jan. 6, not Apr. 28.
@@ -904,8 +1053,8 @@
not 1920-01-06. The old entry was based on a misinterpretation of Shanks.
Some more zones have been turned into links, when they differed
- from existing zones only for older time stamps. As usual,
- these changes affect UTC offsets in pre-1970 time stamps only.
+ from existing zones only for older timestamps. As usual,
+ these changes affect UTC offsets in pre-1970 timestamps only.
Their old contents have been moved to the 'backzone' file.
The affected zones are: Africa/Blantyre, Africa/Bujumbura,
Africa/Gaborone, Africa/Harare, Africa/Kigali, Africa/Lubumbashi,
@@ -917,7 +1066,7 @@
not merely on platforms defining TM_GMTOFF.
The tz library's localtime and mktime functions now set tzname to a value
- appropriate for the requested time stamp, and zdump now uses this
+ appropriate for the requested timestamp, and zdump now uses this
on platforms not defining TM_ZONE, fixing a 2014g regression.
(Thanks to Tim Parenti for reporting the problem.)
@@ -957,13 +1106,13 @@
Release 2014g - 2014-08-28 12:31:23 -0700
- Changes affecting future time stamps
+ Changes affecting future timestamps
Turks & Caicos is switching from US eastern time to UT -04
year-round, modeled as a switch on 2014-11-02 at 02:00.
[As noted in 2014j, this switch was later delayed.]
- Changes affecting past time stamps
+ Changes affecting past timestamps
Time in Russia or the USSR before 1926 or so has been corrected by
a few seconds in the following zones: Asia/Irkutsk,
@@ -973,7 +1122,7 @@
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