bool extrinsic_amulet_effect(jewellery_type amulet);

bool wearing_amulet(jewellery_type amulet, bool calc_unid)

// Returns whether the player has the effect of the amulet
// from a non-amulet source.
bool extrinsic_amulet_effect(jewellery_type amulet)

    if (amulet == AMU_CONTROLLED_FLIGHT
        && (you.duration[DUR_CONTROLLED_FLIGHT]
            || player_genus(GENPC_DRACONIAN)
            || you.attribute[ATTR_TRANSFORMATION] == TRAN_DRAGON
            || you.attribute[ATTR_TRANSFORMATION] == TRAN_BAT))

    switch ( amulet )

        return (true);

    case AMU_CONTROLLED_FLIGHT:
        return (you.duration[DUR_CONTROLLED_FLIGHT]
                || player_genus(GENPC_DRACONIAN)
                || you.attribute[ATTR_TRANSFORMATION] == TRAN_DRAGON
                || you.attribute[ATTR_TRANSFORMATION] == TRAN_BAT);
    case AMU_CLARITY:
        return (player_mutation_level(MUT_CLARITY) > 0);
    case AMU_RESIST_CORROSION:
    case AMU_CONSERVATION:
        return (player_equip_ego_type(EQ_CLOAK, SPARM_PRESERVATION) > 0);
    default:
        return false;

}

    if (amulet == AMU_CLARITY && player_mutation_level(MUT_CLARITY))

bool wearing_amulet(jewellery_type amulet, bool calc_unid)
{
    if ( extrinsic_amulet_effect(amulet) )

    if (amulet == AMU_RESIST_CORROSION || amulet == AMU_CONSERVATION)
    {
        // XXX: this is hackish {dlb}
        if (player_equip_ego_type( EQ_CLOAK, SPARM_PRESERVATION ))
            return (true);
    }

    if (you.inv[you.equip[EQ_AMULET]].sub_type == amulet
        && ( calc_unid || item_type_known(you.inv[you.equip[EQ_AMULET]]) ))
    {
        return (true);
    }
    return (false);

    const item_def& amu(you.inv[you.equip[EQ_AMULET]]);
    return (amu.sub_type == amulet && (calc_unid || item_type_known(amu)));

        // Amulets can auto-ID.
        // FIXME: should also happen when putting on/removing amulet
        // while levitating.
        if (!you.duration[DUR_LEVITATION]
            && wearing_amulet(AMU_CONTROLLED_FLIGHT)
            && !extrinsic_amulet_effect(AMU_CONTROLLED_FLIGHT))
        {
            item_def& amu(you.inv[you.equip[EQ_AMULET]]);
            set_ident_type(amu.base_type, amu.sub_type, ID_KNOWN_TYPE);
            set_ident_flags(amu, ISFLAG_KNOW_PROPERTIES);
            mprf("You are wearing: %s", amu.name(DESC_INVENTORY_EQUIP).c_str());
        }