Re: Scoring out of bounds

[Katsumi Yamaoka <yamaoka@jpl.org>]

>>>>> In <vz65i0smwp.fsf@redqueen.bytechase.cx>
>>>>>	Norbert Koch <viteno@xemacs.org> wrote:

> Katsumi Yamaoka <yamaoka@jpl.org> writes:

>> (floor (+ (lsh -1 -1) 0.999))
>>  => 134217727

> Ah, I've always shifted in the other direction :-)

> I'm not sure whether to call this behaviour a bug.  If an operation
> returns an out of bound value, you've always got two possibilities:
> flag an error or silently convert it to the maximum allowed error.

I don't intend to complain to the XEmacs development team
because it is not an essential problem when the score value
grows unusually large. ;-)

I was simply surprised that XEmacs' floor (and other arithmetic
functions) cannot handle a floating point number over the half
of the maximum integer:

(floor (+ (/ most-positive-fixnum 2.0) 0.499))
 => 536870911
(floor (+ (/ most-positive-fixnum 2.0) 0.500))
 => ...
-- 
Katsumi Yamaoka <yamaoka@jpl.org>