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refine Integer#**

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* numeric.c (fix_pow): calculate the denominator, exponent of
  self.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63676 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-06-17 01:07:27 +00:00
parent 47bd700774
commit f12cc0e6f7
1 changed files with 8 additions and 4 deletions
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12
numeric.c
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@ -3974,8 +3974,10 @@ fix_pow(VALUE x, VALUE y)
else
return INT2FIX(-1);
}
if (b < 0)
return num_funcall1(rb_rational_raw1(x), idPow, y);
if (b < 0) {
if (a == 0) rb_num_zerodiv();
return rb_rational_raw(INT2FIX(1), rb_int_pow(x, LONG2NUM(-b)));
}
if (b == 0) return INT2FIX(1);
if (b == 1) return x;
@ -3991,8 +3993,10 @@ fix_pow(VALUE x, VALUE y)
if (int_even_p(y)) return INT2FIX(1);
else return INT2FIX(-1);
}
if (rb_num_negative_int_p(y))
return num_funcall1(rb_rational_raw1(x), idPow, y);
if (BIGNUM_NEGATIVE_P(y)) {
if (a == 0) rb_num_zerodiv();
return rb_rational_raw(INT2FIX(1), rb_int_pow(x, rb_big_uminus(y)));
}
if (a == 0) return INT2FIX(0);
x = rb_int2big(FIX2LONG(x));
return rb_big_pow(x, y);