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rational.c: define Rational#{negative?,positive?}

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* rational.c (nurat_{negative,positive}_p): define Rational#negative?
  and Rational#positive?, respectively.
  Author: Tadashi Saito <tad.a.digger@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56756 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
mrkn 2016-11-12 15:07:53 +00:00
parent 189ba5e0ac
commit a36d273eab
1 changed files with 28 additions and 0 deletions
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28
rational.c
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@ -1204,6 +1204,32 @@ nurat_true(VALUE self)
}
#endif
/*
* call-seq:
* rat.positive? -> true or false
*
* Returns +true+ if +rat+ is greater than 0.
*/
static VALUE
nurat_positive_p(VALUE self)
{
get_dat1(self);
return f_boolcast(INT_POSITIVE_P(dat->num));
}
/*
* call-seq:
* rat.negative? -> true or false
*
* Returns +true+ if +rat+ is less than 0.
*/
static VALUE
nurat_negative_p(VALUE self)
{
get_dat1(self);
return f_boolcast(INT_NEGATIVE_P(dat->num));
}
static VALUE
nurat_floor(VALUE self)
{
@ -2608,6 +2634,8 @@ Init_Rational(void)
rb_define_method(rb_cRational, "rational?", nurat_true, 0);
rb_define_method(rb_cRational, "exact?", nurat_true, 0);
#endif
rb_define_method(rb_cRational, "positive?", nurat_positive_p, 0);
rb_define_method(rb_cRational, "negative?", nurat_negative_p, 0);
rb_define_method(rb_cRational, "floor", nurat_floor_n, -1);
rb_define_method(rb_cRational, "ceil", nurat_ceil_n, -1);