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* rational.c (nurat_div): divided by float zero should be

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infinity.  [ruby-core:31626]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28886 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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nobu 2010-08-06 11:12:35 +00:00
parent 8aa6059dbf
commit edd4332a38
3 changed files with 10 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Fri Aug 6 20:12:28 2010 Nobuyoshi Nakada <nobu@ruby-lang.org>
* rational.c (nurat_div): divided by float zero should be
infinity. [ruby-core:31626]
Fri Aug 6 18:59:23 2010 Nobuyoshi Nakada <nobu@ruby-lang.org> Fri Aug 6 18:59:23 2010 Nobuyoshi Nakada <nobu@ruby-lang.org>
* file.c (realpath_rec): rb_str_modify depends on the length, so * file.c (realpath_rec): rb_str_modify depends on the length, so

2
rational.c
View file

@ -882,7 +882,7 @@ nurat_div(VALUE self, VALUE other)
return DBL2NUM(-INFINITY); return DBL2NUM(-INFINITY);
} }
} }
if (modf(x, &den) == 0.0) { if (x != 0.0 && modf(x, &den) == 0.0) {
return rb_rational_raw2(dat->num, f_mul(rb_dbl2big(den), dat->den)); return rb_rational_raw2(dat->num, f_mul(rb_dbl2big(den), dat->den));
} }
} }

4
test/ruby/test_rational.rb
View file

@ -297,6 +297,8 @@ class Rational_Test < Test::Unit::TestCase
assert_raise(ZeroDivisionError){Rational(1, 3) / 0} assert_raise(ZeroDivisionError){Rational(1, 3) / 0}
assert_raise(ZeroDivisionError){Rational(1, 3) / Rational(0)} assert_raise(ZeroDivisionError){Rational(1, 3) / Rational(0)}
assert((Rational(1, 3) / 0.0).infinite?, '[ruby-core:31626]')
end end
def assert_eql(exp, act, *args) def assert_eql(exp, act, *args)
@ -546,6 +548,7 @@ class Rational_Test < Test::Unit::TestCase
assert_equal(0.25, c.fdiv(2)) assert_equal(0.25, c.fdiv(2))
assert_equal(0.25, c.fdiv(2.0)) assert_equal(0.25, c.fdiv(2.0))
assert(c.fdiv(0).infinite?, '[ruby-core:31626]')
end end
def test_expt def test_expt
@ -1067,6 +1070,7 @@ class Rational_Test < Test::Unit::TestCase
assert_equal(Rational(5000000000), 10000000000.quo(2)) assert_equal(Rational(5000000000), 10000000000.quo(2))
assert_equal(0.5, 1.0.quo(2)) assert_equal(0.5, 1.0.quo(2))
assert_equal(Rational(1,4), Rational(1,2).quo(2)) assert_equal(Rational(1,4), Rational(1,2).quo(2))
assert(Rational(1,2).quo(0.0).infinite?, '[ruby-core:31626]')
assert_equal(0.5, 1.fdiv(2)) assert_equal(0.5, 1.fdiv(2))
assert_equal(5000000000.0, 10000000000.fdiv(2)) assert_equal(5000000000.0, 10000000000.fdiv(2))