diff options
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(); } |