diff options
author | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-11-16 14:41:11 +0000 |
---|---|---|
committer | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2007-11-16 14:41:11 +0000 |
commit | 4bd57e3311ef216016ba06560f2b531147678511 (patch) | |
tree | 46fcb91af5603a022818ef3fa4425649fe026179 /bignum.c | |
parent | 0d95854a52fb35f9d6827aef91fca50d6bcc600f (diff) | |
download | ruby-4bd57e3311ef216016ba06560f2b531147678511.tar.gz |
* bignum.c (rb_big_odd_p): new method added. a patch from Tadashi
Saito <shiba AT mail2.accsnet.ne.jp>. [ruby-dev:32305]
* bignum.c (rb_big_even_p): ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13950 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'bignum.c')
-rw-r--r-- | bignum.c | 34 |
1 files changed, 34 insertions, 0 deletions
@@ -2432,6 +2432,38 @@ rb_big_size(VALUE big) } /* + * call-seq: + * big.odd? -> true or false + * + * Returns <code>true</code> if <i>big</i> is an odd number. + */ + +static VALUE +rb_big_odd_p(VALUE num) +{ + if (BDIGITS(num)[0] & 1) { + return Qtrue; + } + return Qfalse; +} + +/* + * call-seq: + * big.even? -> true or false + * + * Returns <code>true</code> if <i>big</i> is an even number. + */ + +static VALUE +rb_big_even_p(VALUE num) +{ + if (BDIGITS(num)[0] & 1) { + return Qfalse; + } + return Qtrue; +} + +/* * Bignum objects hold integers outside the range of * Fixnum. Bignum objects are created * automatically when integer calculations would otherwise overflow a @@ -2484,6 +2516,8 @@ Init_Bignum(void) rb_define_method(rb_cBignum, "to_f", rb_big_to_f, 0); rb_define_method(rb_cBignum, "abs", rb_big_abs, 0); rb_define_method(rb_cBignum, "size", rb_big_size, 0); + rb_define_method(rb_cBignum, "odd?", rb_big_odd_p, 0); + rb_define_method(rb_cBignum, "even?", rb_big_even_p, 0); power_cache_init(); } |