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* ext/bigdecimal/bigdecimal.c (Init_bigdecimal): add two new constants BigDecimal::INFINITY and BigDecimal::NAN.

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* ext/bigdecimal/lib/bigdecimal/math.rb (BigMath.exp): modify the behaviors for infinity arguments as same as Math.exp.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28533 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
mrkn 2010-07-03 07:47:00 +00:00
parent 59cad45f99
commit 1c3e07f0d6
5 changed files with 43 additions and 3 deletions
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8
test/bigdecimal/test_bigmath.rb
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@ -67,6 +67,14 @@ class TestBigMath < Test::Unit::TestCase
assert_in_epsilon(Math.exp(40), exp(BigDecimal("40"), N))
assert_in_epsilon(Math.exp(-N), exp(BigDecimal("-20"), N))
assert_in_epsilon(Math.exp(-40), exp(BigDecimal("-40"), N))
begin
old_mode = BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY)
BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
assert(exp(BigDecimal::INFINITY, N).infinite?, "exp(INFINITY) is not an infinity")
ensure
#BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, old_mode)
end
assert_equal(0.0, exp(-BigDecimal::INFINITY, N))
end
def test_log