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util.c: round to even

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* util.c (ruby_dtoa): round to even, instead of rounding to
  nearest.  [ruby-core:77864] [Bug #12889]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56557 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-11-04 07:31:47 +00:00
parent 25728a1963
commit 6ed8c79ddb
3 changed files with 23 additions and 8 deletions
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11
test/ruby/test_sprintf.rb
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@ -283,7 +283,16 @@ class TestSprintf < Test::Unit::TestCase
end
def test_float_prec
assert_equal("5.03", sprintf("%.2f",5.025))
assert_equal("5.00", sprintf("%.2f",5.005))
assert_equal("5.02", sprintf("%.2f",5.015))
assert_equal("5.02", sprintf("%.2f",5.025))
assert_equal("5.04", sprintf("%.2f",5.035))
bug12889 = '[ruby-core:77864] [Bug #12889]'
assert_equal("1234567892", sprintf("%.0f", 1234567891.99999))
assert_equal("1234567892", sprintf("%.0f", 1234567892.49999))
assert_equal("1234567892", sprintf("%.0f", 1234567892.50000))
assert_equal("1234567894", sprintf("%.0f", 1234567893.50000))
assert_equal("1234567892", sprintf("%.0f", 1234567892.00000), bug12889)
end
BSIZ = 120