Function forcelock

src/lock.c:215–256

try to force a locked chest */

/* try to force a locked chest */
staticfn int
forcelock(void)
{
    if ((gx.xlock.box->ox != u.ux) || (gx.xlock.box->oy != u.uy))
        return ((gx.xlock.usedtime = 0)); /* you or it moved */

    if (gx.xlock.usedtime++ >= 50 || !uwep || nohands(gy.youmonst.data)) {
        You("give up your attempt to force the lock.");
        if (gx.xlock.usedtime >= 50) /* you made the effort */
            exercise((gx.xlock.picktyp) ? A_DEX : A_STR, TRUE);
        return ((gx.xlock.usedtime = 0));
    }

    if (gx.xlock.picktyp) { /* blade */
        if (rn2(1000 - (int) uwep->spe) > (992 - greatest_erosion(uwep) * 10)
            && !uwep->cursed && !obj_resists(uwep, 0, 99)) {
            /* for a +0 weapon, probability that it survives an unsuccessful
             * attempt to force the lock is (.992)^50 = .67
             */
            pline("%sour %s broke!", (uwep->quan > 1L) ? "One of y" : "Y",
                  xname(uwep));
            useup(uwep);
            You("give up your attempt to force the lock.");
            exercise(A_DEX, TRUE);
            return ((gx.xlock.usedtime = 0));
        }
    } else             /* blunt */
        wake_nearby(FALSE); /* due to hammering on the container */

    if (rn2(100) >= gx.xlock.chance)
        return 1; /* still busy */

    You("succeed in forcing the lock.");
    exercise(gx.xlock.picktyp ? A_DEX : A_STR, TRUE);
    /* breakchestlock() might destroy xlock.box; if so, xlock context will
       be cleared (delobj -> obfree -> maybe_reset_pick); but it might not,
       so explicitly clear that manually */
    breakchestlock(gx.xlock.box, (boolean) (!gx.xlock.picktyp && !rn2(3)));
    reset_pick(); /* lock-picking context is no longer valid */

    return 0;
}

void
reset_pick(void)