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bignum.c: Bignum zero comparison

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* bignum.c (rb_big_eq): test as Fixnum if possible and get rid of zero
  length Bignum.  [ruby-core:53893] [Bug #8204]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40076 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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nobu 2013-04-03 07:34:31 +00:00
parent 8ab35353a7
commit b30a6b8d1d
6 changed files with 52 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Wed Apr 3 16:34:24 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* bignum.c (rb_big_eq): test as Fixnum if possible and get rid of zero
length Bignum. [ruby-core:53893] [Bug #8204]
Tue Apr 2 23:56:03 2013 Tanaka Akira <akr@fsij.org>
* lib/securerandom.rb (SecureRandom.random_bytes): Use

1
bignum.c
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@ -1686,6 +1686,7 @@ rb_big_eq(VALUE x, VALUE y)
{
switch (TYPE(y)) {
case T_FIXNUM:
if (bignorm(x) == y) return Qtrue;
y = rb_int2big(FIX2LONG(y));
break;
case T_BIGNUM:

16
ext/-test-/bignum/bigzero.c Normal file
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@ -0,0 +1,16 @@
#include "ruby.h"
static VALUE
bug_big_zero(VALUE self, VALUE length)
{
long len = NUM2ULONG(length);
VALUE z = rb_big_new(len, 1);
MEMZERO(RBIGNUM_DIGITS(z), BDIGIT, len);
return z;
}
void
Init_bigzero(VALUE klass)
{
rb_define_singleton_method(klass, "zero", bug_big_zero, 1);
}

6
ext/-test-/bignum/extconf.rb Normal file
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@ -0,0 +1,6 @@
$srcs = Dir[File.join($srcdir, "*.{#{SRC_EXT.join(%q{,})}}")]
inits = $srcs.map {|s| File.basename(s, ".*")}
inits.delete("init")
inits.map! {|s|"X(#{s})"}
$defs << "-DTEST_INIT_FUNCS(X)=\"#{inits.join(' ')}\""
create_makefile("-test-/bignum")

11
ext/-test-/bignum/init.c Normal file
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@ -0,0 +1,11 @@
#include "ruby.h"
#define init(n) {void Init_##n(VALUE klass); Init_##n(klass);}
void
Init_bignum(void)
{
VALUE mBug = rb_define_module("Bug");
VALUE klass = rb_define_class_under(mBug, "Bignum", rb_cString);
TEST_INIT_FUNCS(init);
}

13
test/-ext-/bignum/test_bigzero.rb Normal file
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@ -0,0 +1,13 @@
require 'test/unit'
require "-test-/bignum"
class TestBignum < Test::Unit::TestCase
class TestBigZero < Test::Unit::TestCase
def test_equal_0
bug8204 = '[ruby-core:53893] [Bug #8204]'
(0..10).each do |i|
assert_equal(0, Bug::Bignum.zero(i), "#{bug8204} Bignum.zero(#{i})")
end
end
end
end