Subj : Re: object serialization
To   : netscape.public.mozilla.jseng
From : Jens Thiele <karme@unforgettable.com>
Date : Thu Apr 08 2004 10:48 pm

> My patch should work better.  Your patch will cast o to an integer type,
> shift it left, and | 1 with it to tag it as an int jsval, which might at
> the limit create an id that aliases two objects.  Very unlikely, but not
> fully general.
> 
> The patch I posted is general, because object pointers are guaranteed to
> be aligned on 0 mod 8 boundaries, so |'ing 1 loses no data; nothing is
> shifted.

seems to work
i added an assert ;-)

JS_PUBLIC_API(JSBool)
JS_GetObjectId(JSContext *cx, JSObject *obj, jsid *idp)
{
    JS_ASSERT( ( (jsid) obj & 7 ) == 0 );
    *idp = (jsid) obj | JSVAL_INT;
    return JS_TRUE;
}

and now use this as hash function (for objects)
thanks!

.