TAP_STATE_DOUBLE_TAPPING
case TAP_STATE_DOUBLE_TAPPING:
case TAP_STATE_DOUBLE_TAPPING: state = "double-tapping"; break;
tap_transition(sc, TAP_STATE_DOUBLE_TAPPING, start_time, fingers,
case TAP_STATE_DOUBLE_TAPPING:
case TAP_STATE_DOUBLE_TAPPING:
case TAP_STATE_DOUBLE_TAPPING: