Function restrap

src/mon.c:4661–4693

unwatched hiders may hide again; if so, returns True */

/* unwatched hiders may hide again; if so, returns True */
staticfn boolean
restrap(struct monst *mtmp)
{
    struct trap *t;

    if (mtmp->mcan || M_AP_TYPE(mtmp) || cansee(mtmp->mx, mtmp->my)
        || rn2(3) || mtmp == u.ustuck
        /* can't hide while trapped except in pits */
        || (mtmp->mtrapped && (t = t_at(mtmp->mx, mtmp->my)) != 0
            && !is_pit(t->ttyp))
        /* can't hide on ceiling if there isn't one */
        || (ceiling_hider(mtmp->data) && !has_ceiling(&u.uz))
        /* won't hide when adjacent to hero */
        || (sensemon(mtmp) && m_next2u(mtmp)))
        return FALSE;

    if (mtmp->data->mlet == S_MIMIC) {
        if (mtmp->msleeping || mtmp->mfrozen) {
        /*
         * The mimic needs to be awake to disguise itself
         * as something else.
         */
            return FALSE;
        }
        set_mimic_sym(mtmp);
        return TRUE;
    } else if (levl[mtmp->mx][mtmp->my].typ == ROOM) {
        mtmp->mundetected = 1;
        return TRUE;
    }

    return FALSE;
}

/* reveal a hiding monster at x,y, either under nonexistent object,
   or an eel out of water. */