SW_NO_ERROR
(f[n - 2] << 8 | f[n - 1]) != SW_NO_ERROR) {
if ((sw[0] << 8 | sw[1]) != SW_NO_ERROR) {
if (len < 2 || ((reply[len - 2] << 8) | reply[len - 1]) != SW_NO_ERROR) {
if (len < 2 || ((reply[len - 2] << 8) | reply[len - 1]) != SW_NO_ERROR) {
case SW_NO_ERROR: