Function onbill

src/shk.c:1135–1155

}

staticfn struct bill_x *
onbill(struct obj *obj, struct monst *shkp, boolean silent)
{
    if (shkp) {
        struct bill_x *bp;
        int ct;

        for (ct = ESHK(shkp)->billct, bp = ESHK(shkp)->bill_p;
             ct > 0; --ct, ++bp) {
            if (bp->bo_id == obj->o_id) {
                if (!obj->unpaid)
                    impossible("onbill: paid obj on bill?");
                return bp;
            }
        }
    }
    if (obj->unpaid && !silent)
        impossible("onbill: unpaid obj %s?",
                   !shkp ? "without shopkeeper" : "not on shk's bill");
    return (struct bill_x *) 0;
}

/* used outside of shk.c when caller wants to know whether item is on bill
   but doesn't need to know any details about the bill itself */