Function useupf

src/invent.c:4762–4783

* uses up an object that's on the floor, charging for it as necessary */

 * uses up an object that's on the floor, charging for it as necessary
 */
void
useupf(struct obj *obj, long numused)
{
    struct obj *otmp;
    boolean at_u = u_at(obj->ox, obj->oy);

    /* burn_floor_objects() keeps an object pointer that it tries to
     * useupf() multiple times, so obj must survive if plural */
    if (obj->quan > numused)
        otmp = splitobj(obj, numused);
    else
        otmp = obj;
    if (!svc.context.mon_moving && costly_spot(otmp->ox, otmp->oy)) {
        if (strchr(u.urooms, *in_rooms(otmp->ox, otmp->oy, 0)))
            addtobill(otmp, FALSE, FALSE, FALSE);
        else
            (void) stolen_value(otmp, otmp->ox, otmp->oy, FALSE, FALSE);
    }
    delobj(otmp);
    if (at_u && u.uundetected && hides_under(gy.youmonst.data))
        (void) hideunder(&gy.youmonst);
}

/*
 * Conversion from a class to a string for printing.