Function saleable

src/shknam.c:804–824

does shkp's shop stock this item type? */

/* does shkp's shop stock this item type? */
boolean
saleable(struct monst *shkp, struct obj *obj)
{
    int i, shp_indx = ESHK(shkp)->shoptype - SHOPBASE;
    const struct shclass *shp = &shtypes[shp_indx];

    if (shp->symb == RANDOM_CLASS)
        return TRUE;
    for (i = 0; i < SIZE(shtypes[0].iprobs) && shp->iprobs[i].iprob; i++) {
        /* pseudo-class needs special handling */
        if (shp->iprobs[i].itype == VEGETARIAN_CLASS) {
            if (veggy_item(obj, 0))
                return TRUE;
        } else if ((shp->iprobs[i].itype < 0)
                       ? shp->iprobs[i].itype == -obj->otyp
                       : shp->iprobs[i].itype == obj->oclass)
            return TRUE;
    }
    /* not found */
    return FALSE;
}

/* positive value: class; negative value: specific object type.
   can also return non-existing object class (eg. VEGETARIAN_CLASS) */