static VALUE
float_decode(VALUE self)
{
VALUE f, n;
float_decode_internal(self, &f, &n);
return rb_assoc_new(f, n);
}
static VALUE
float_to_r(VALUE self)
{
VALUE f, n;
float_decode_internal(self, &f, &n);
return f_mul(f, f_expt(INT2FIX(FLT_RADIX), n));
}
/*
* call-seq:
* flt.to_r -> rational
*
* Returns the value as a rational.
*
* NOTE: 0.3.to_r isn't the same as '0.3'.to_r. The latter is
* equivalent to '3/10'.to_r, but the former isn't so.
*
* For example:
*
* 2.0.to_r #=> (2/1)
* 2.5.to_r #=> (5/2)
* -0.75.to_r #=> (-3/4)
* 0.0.to_r #=> (0/1)
*/
static VALUE
float_to_r(VALUE self, SEL sel)
{
VALUE f, n;
float_decode_internal(self, &f, &n);
#if FLT_RADIX == 2
{
long ln = FIX2LONG(n);
if (ln == 0)
return f_to_r(f);
if (ln > 0)
return f_to_r(f_lshift(f, n));
ln = -ln;
return rb_rational_new2(f, f_lshift(ONE, INT2FIX(ln)));
}
#else
return f_to_r(f_mul(f, f_expt(INT2FIX(FLT_RADIX), n)));
#endif
}
