Function useup

src/invent.c:1320–1333

an item in inventory is going away after being used */

/* an item in inventory is going away after being used */
void
useup(struct obj *obj)
{
    /* Note:  This works correctly for containers because they (containers)
       don't merge. */
    if (obj->quan > 1L) {
        obj->in_use = FALSE; /* no longer in use */
        obj->quan--;
        obj->owt = weight(obj);
        update_inventory();
    } else {
        useupall(obj);
    }
}

/* use one charge from an item and possibly incur shop debt for it */
void