Function Ring_on

src/do_wear.c:1241–1344

}

void
Ring_on(struct obj *obj)
{
    long oldprop = u.uprops[objects[obj->otyp].oc_oprop].extrinsic;
    boolean observable;

    /* make sure ring isn't wielded; can't use remove_worn_item()
       here because it has already been set worn in a ring slot */
    if (obj == uwep)
        setuwep((struct obj *) 0);
    else if (obj == uswapwep)
        setuswapwep((struct obj *) 0);
    else if (obj == uquiver)
        setuqwep((struct obj *) 0);

    /* only mask out W_RING when we don't have both
       left and right rings of the same type */
    if ((oldprop & W_RING) != W_RING)
        oldprop &= ~W_RING;

    switch (obj->otyp) {
    case RIN_TELEPORTATION:
    case RIN_REGENERATION:
    case RIN_SEARCHING:
    case RIN_HUNGER:
    case RIN_AGGRAVATE_MONSTER:
    case RIN_POISON_RESISTANCE:
    case RIN_FIRE_RESISTANCE:
    case RIN_COLD_RESISTANCE:
    case RIN_SHOCK_RESISTANCE:
    case RIN_CONFLICT:
    case RIN_TELEPORT_CONTROL:
    case RIN_POLYMORPH:
    case RIN_POLYMORPH_CONTROL:
    case RIN_FREE_ACTION:
    case RIN_SLOW_DIGESTION:
    case RIN_SUSTAIN_ABILITY:
        break;
    case MEAT_RING:
        /* wearing a meat ring does not affect vegan conduct */
        break;
    case RIN_STEALTH:
        toggle_stealth(obj, oldprop, TRUE);
        break;
    case RIN_WARNING:
        see_monsters();
        break;
    case RIN_SEE_INVISIBLE:
        /* can now see invisible monsters */
        set_mimic_blocking(); /* do special mimic handling */
        see_monsters();

        if (Invis && !oldprop && !HSee_invisible && !Blind) {
            newsym(u.ux, u.uy);
            pline("Suddenly you are transparent, but there!");
            learnring(obj, TRUE);
        }
        break;