Function doapply

src/apply.c:4213–4425

the #apply command, 'a' */

/* the #apply command, 'a' */
int
doapply(void)
{
    struct obj *obj;
    int res = ECMD_TIME;

    if (nohands(gy.youmonst.data)) {
        You("aren't able to use or apply tools in your current form.");
        return ECMD_OK;
    }
    if (check_capacity((char *) 0))
        return ECMD_OK;

    obj = getobj("use or apply", apply_ok, GETOBJ_NOFLAGS);
    if (!obj)
        return ECMD_CANCEL;

    if (!retouch_object(&obj, FALSE))
        return ECMD_TIME; /* evading your grasp costs a turn; just be
                             grateful that you don't drop it as well */

    if (obj->oclass == WAND_CLASS)
        return do_break_wand(obj);

    if (obj->oclass == SPBOOK_CLASS)
        return flip_through_book(obj);

    if (obj->oclass == COIN_CLASS)
        return flip_coin(obj);

    switch (obj->otyp) {
    case BLINDFOLD:
    case LENSES:
        if (obj == ublindf) {
            if (!cursed(obj))
                Blindf_off(obj);
        } else if (!ublindf) {
            Blindf_on(obj);
        } else {
            You("are already %s.",
                (ublindf->otyp == TOWEL) ? "covered by a towel"
                : (ublindf->otyp == BLINDFOLD) ? "wearing a blindfold"
                  : "wearing lenses");
        }
        break;
    case CREAM_PIE:
        res = use_cream_pie(obj);
        obj = (struct obj *) 0;
        break;
    case LUMP_OF_ROYAL_JELLY:
        res = use_royal_jelly(&obj);
        break;
    case BULLWHIP:
        res = use_whip(obj);
        break;
    case GRAPPLING_HOOK:
        res = use_grapple(obj);
        break;