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* ext/bigdecimal/bigdecimal.c (VpCtoV): 1E1000...000 is interpreted as

Browse source 
Infinity.  [ruby-dev:36159]

* ext/bigdecimal/bigdecimal.c (VpPower): Infinity ** 1 returns
  Infinity instead of NaN.  [ruby-dev:36159]

* test/bigdecimal/test_bigdecimal.rb: add tests for above.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19419 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
mame 2008-09-18 13:48:21 +00:00
parent c3e2e0e53f
commit e040ff5530
3 changed files with 47 additions and 5 deletions
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19
test/bigdecimal/test_bigdecimal.rb
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@ -595,7 +595,18 @@ class TestBigDecimal < Test::Unit::TestCase
assert_equal(BigDecimal.new("-Infinity"), BigDecimal.new("-0") ** -1)
BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
assert_equal(true, (BigDecimal.new("NaN") ** 1).nan?)
assert_equal(true, (BigDecimal.new("Infinity") ** 1).nan?) # OK?
assert_equal(BigDecimal::SIGN_POSITIVE_INFINITE, (BigDecimal.new("Infinity") ** 2).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_INFINITE, (BigDecimal.new("Infinity") ** 1).sign)
assert_equal(1, BigDecimal.new("Infinity") ** 0)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("Infinity") ** -1).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("Infinity") ** -2).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_INFINITE, (BigDecimal.new("-Infinity") ** 2).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_INFINITE, (BigDecimal.new("-Infinity") ** 1).sign)
assert_equal(1, BigDecimal.new("-Infinity") ** 0)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, (BigDecimal.new("-Infinity") ** -1).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, (BigDecimal.new("-Infinity") ** -2).sign)
end
def test_limit
@ -676,6 +687,10 @@ class TestBigDecimal < Test::Unit::TestCase
assert_equal(10, BigDecimal.new("1E+1"))
assert_equal(1, BigDecimal.new("+1"))
BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
assert_equal(0, BigDecimal.new("1E1" + "0" * 100)) # OK? must it be inf?
assert_equal(BigDecimal::SIGN_POSITIVE_INFINITE, BigDecimal.new("1E1" + "0" * 10000).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_INFINITE, BigDecimal.new("-1E1" + "0" * 10000).sign)
assert_equal(BigDecimal::SIGN_POSITIVE_ZERO, BigDecimal.new("1E-1" + "0" * 10000).sign)
assert_equal(BigDecimal::SIGN_NEGATIVE_ZERO, BigDecimal.new("-1E-1" + "0" * 10000).sign)
end
end