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* bignum.c (): refix of r33536. Don't change behavior of Bignum#/.

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[ruby-core:40429] [Bug #5490]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33812 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2011-11-22 02:27:53 +00:00
parent 033244c1b2
commit 30d762795c
3 changed files with 15 additions and 5 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
Tue Nov 22 11:26:08 2011 NARUSE, Yui <naruse@ruby-lang.org>
* bignum.c (): refix of r33536. Don't change behavior of Bignum#/.
[ruby-core:40429] [Bug #5490]
Tue Nov 22 10:46:57 2011 NARUSE, Yui <naruse@ruby-lang.org>
* numeric.c (ruby_float_step): improve floating point calculations.

9
bignum.c
View file

@ -2781,14 +2781,13 @@ rb_big_divide(VALUE x, VALUE y, ID op)
case T_FLOAT:
{
double div, dy = RFLOAT_VALUE(y);
if (dy == 0.0) rb_num_zerodiv();
div = rb_big2dbl(x) / dy;
if (op == '/') {
return DBL2NUM(div);
return DBL2NUM(rb_big2dbl(x) / RFLOAT_VALUE(y));
}
else {
return rb_dbl2big(div);
double dy = RFLOAT_VALUE(y);
if (dy == 0.0) rb_num_zerodiv();
return rb_dbl2big(rb_big2dbl(x) / dy);
}
}

6
test/ruby/test_bignum.rb
View file

@ -268,6 +268,12 @@ class TestBignum < Test::Unit::TestCase
assert_equal(0, T32 / T64)
end
def test_divide
bug5490 = '[ruby-core:40429]'
assert_raise(ZeroDivisionError, bug5490) {T1024./(0)}
assert_equal(Float::INFINITY, T1024./(0.0), bug5490)
end
def test_div
assert_equal(T32.to_f, T32 / 1.0)
assert_raise(TypeError) { T32 / "foo" }