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* time.c (guess_local_offset): use the UTC offset of an older date on

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64bit time_t environment.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28646 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2010-07-14 21:05:00 +00:00
parent 8742248884
commit b782aea75f
3 changed files with 20 additions and 3 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
Thu Jul 15 06:01:42 2010 Tanaka Akira <akr@fsij.org>
* time.c (guess_local_offset): use the UTC offset of an older date on
64bit time_t environment.
Thu Jul 15 02:42:51 2010 Aaron Patterson <aaron@tenderlovemaking.com>
* lib/test/unit.rb (setup_argv): convert to using optparse, adding

7
test/ruby/test_time_tz.rb
View file

@ -80,7 +80,6 @@ class TestTimeTZ < Test::Unit::TestCase
with_tz(tz="America/Los_Angeles") {
assert_time_constructor(tz, "2007-03-11 03:00:00 -0700", :local, [2007,3,11,2,0,0])
assert_time_constructor(tz, "2007-03-11 03:59:59 -0700", :local, [2007,3,11,2,59,59])
#assert_equal("PST", Time.new(-0x1_0000_0000_0000_0000).zone)
assert_equal("PST", Time.new(0x1_0000_0000_0000_0000, 1).zone)
assert_equal("PDT", Time.new(0x1_0000_0000_0000_0000, 8).zone)
assert_equal(false, Time.new(0x1_0000_0000_0000_0000, 1).isdst)
@ -136,6 +135,12 @@ class TestTimeTZ < Test::Unit::TestCase
}
end
def test_europe_lisbon
with_tz(tz="Europe/Lisbon") {
assert_equal("LMT", Time.new(-0x1_0000_0000_0000_0000).zone)
}
end
def test_europe_moscow
with_tz(tz="Europe/Moscow") {
assert_time_constructor(tz, "1992-03-29 00:00:00 +0400", :local, [1992,3,28,23,0,0])

9
time.c
View file

@ -1506,8 +1506,15 @@ guess_local_offset(struct vtm *vtm_utc, int *isdst_ret, const char **zone_ret)
zone = "UTC";
# if defined(NEGATIVE_TIME_T)
# if SIZEOF_TIME_T <= 4
/* 1901-12-13 20:45:52 UTC : The oldest time in 32-bit signed time_t. */
if (localtime_with_gmtoff_zone((t = (time_t)0x80000000, &t), &tm, &gmtoff, &zone)) {
# define THE_TIME_OLD_ENOUGH ((time_t)0x80000000)
# else
/* Since the Royal Greenwich Observatory was commissioned in 1675,
no timezone defined using GMT at 1600. */
# define THE_TIME_OLD_ENOUGH ((time_t)(1600-1970)*366*24*60*60)
# endif
if (localtime_with_gmtoff_zone((t = THE_TIME_OLD_ENOUGH, &t), &tm, &gmtoff, &zone)) {
off = LONG2FIX(gmtoff);
isdst = tm.tm_isdst;
}