Function could_reach_item

src/dogmove.c:1361–1369

check if a monster could pick up objects from a location */

/* check if a monster could pick up objects from a location */
boolean
could_reach_item(struct monst *mon, coordxy nx, coordxy ny)
{
    if ((!is_pool(nx, ny) || is_swimmer(mon->data))
        && (!is_lava(nx, ny) || likes_lava(mon->data))
        && (!sobj_at(BOULDER, nx, ny) || throws_rocks(mon->data)))
        return TRUE;
    return FALSE;
}

/* Hack to prevent a dog from being endlessly stuck near an object that
 * it can't reach, such as caught in a teleport scroll niche.  It recursively