Function autokey

src/lock.c:288–344

pick a tool for autounlock */

/* pick a tool for autounlock */
struct obj *
autokey(boolean opening) /* True: key, pick, or card; False: key or pick */
{
    struct obj *o, *key, *pick, *card, *akey, *apick, *acard;

    /* mundane item or regular artifact or own role's quest artifact */
    key = pick = card = (struct obj *) 0;
    /* other role's quest artifact (Rogue's Key or Tourist's Credit Card) */
    akey = apick = acard = (struct obj *) 0;
    for (o = gi.invent; o; o = o->nobj) {
        if (any_quest_artifact(o) && !is_quest_artifact(o)) {
            switch (o->otyp) {
            case SKELETON_KEY:
                if (!akey)
                    akey = o;
                break;
            case LOCK_PICK:
                if (!apick)
                    apick = o;
                break;
            case CREDIT_CARD:
                if (!acard)
                    acard = o;
                break;
            default:
                break;
            }
        } else {
            switch (o->otyp) {
            case SKELETON_KEY:
                if (!key || is_magic_key(&gy.youmonst, o))
                    key = o;
                break;
            case LOCK_PICK:
                if (!pick)
                    pick = o;
                break;
            case CREDIT_CARD:
                if (!card)
                    card = o;
                break;
            default:
                break;
            }
        }
    }
    if (!opening)
        card = acard = 0;
    /* only resort to other role's quest artifact if no other choice */
    if (!key && !pick && !card)
        key = akey;
    if (!pick && !card)
        pick = apick;
    if (!card)
        card = acard;
    return key ? key : pick ? pick : card ? card : 0;
}