diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | bignum.c | 34 |
2 files changed, 41 insertions, 0 deletions
@@ -1,3 +1,10 @@ +Fri Nov 16 23:31:18 2007 Yukihiro Matsumoto <matz@ruby-lang.org> + + * 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. + Fri Nov 16 17:41:34 2007 Nobuyoshi Nakada <nobu@ruby-lang.org> * ext/iconv/iconv.c (Document-class): moved the simplest example to @@ -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(); } |