Bignum#odd?, Bignum#even? (for trunk)

Ruby Development
1

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Index: bignum.c

— bignum.c (revision 13949)
+++ bignum.c (working copy)
@@ -2432,6 +2432,38 @@
}

/*

    • call-seq:
    • big.odd? -> true or false
    • Returns true if big 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 true if big 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 @@
    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();
    }