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strftime.c: support unknown offset UTC in RFC 3339 [Feature #17544]

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In RFC 3339, -00:00 is used for the time in UTC is known, but the
offset to local time is unknown.  Support that representation by
`-` flag for `z`.
This commit is contained in:
Nobuyoshi Nakada 2021-01-15 17:19:18 +09:00
parent 4fc6fb2d12
commit 9ef66ce3fc
Notes: git 2021-02-16 20:34:47 +09:00 
Merged: https://github.com/ruby/ruby/pull/4075
2 changed files with 6 additions and 1 deletions
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2
strftime.c
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@ -547,7 +547,7 @@ rb_strftime_with_timespec(VALUE ftime, const char *format, size_t format_len,
else { else {
off = NUM2LONG(rb_funcall(vtm->utc_offset, rb_intern("round"), 0)); off = NUM2LONG(rb_funcall(vtm->utc_offset, rb_intern("round"), 0));
} }
if (off < 0) { if (off < 0 || (off == 0 && (flags & BIT_OF(LEFT)))) {
off = -off; off = -off;
sign = -1; sign = -1;
} }

5
test/ruby/test_time.rb
View File

@ -920,6 +920,11 @@ class TestTime < Test::Unit::TestCase
assert_equal("+09:00", t.strftime("%:z")) assert_equal("+09:00", t.strftime("%:z"))
assert_equal("+09:00:01", t.strftime("%::z")) assert_equal("+09:00:01", t.strftime("%::z"))
assert_equal("+09:00:01", t.strftime("%:::z")) assert_equal("+09:00:01", t.strftime("%:::z"))
assert_equal("+0000", t2000.strftime("%z"))
assert_equal("-0000", t2000.strftime("%-z"))
assert_equal("-00:00", t2000.strftime("%-:z"))
assert_equal("-00:00:00", t2000.strftime("%-::z"))
end end
def test_strftime_padding def test_strftime_padding