/*
* RomRaider Open-Source Tuning, Logging and Reflashing
* Copyright (C) 2006-2012 RomRaider.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package com.romraider.io.protocol.ssm.iso9141;
import static com.romraider.util.ByteUtil.asByte;
import static com.romraider.util.ByteUtil.asInt;
public final class SSMChecksumCalculator {
private SSMChecksumCalculator() {
throw new UnsupportedOperationException();
}
public static byte calculateChecksum(byte[] bytes) {
int total = 0;
for (int i = 0; i < (bytes.length - 1); i++) {
byte b = bytes[i];
total += asInt(b);
}
return asByte(total - ((total >>> 16) << 16));
}
}