org.jmisb.api.klv.st0601

Class Checksum

java.lang.Object

org.jmisb.api.klv.st0601.Checksum

public class Checksum
extends Object

Compute checksum for ST 0601 packet.

Method Summary

Modifier and Type	Method and Description
static byte[]	compute(byte[] fullMessage, boolean insert) Compute checksum.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

compute

public static byte[] compute(byte[] fullMessage,
                             boolean insert)

Compute checksum.

The checksum is computed by summing the full message buffer up to and including the checksum's length field. The reference algorithm as listed in the ST takes two bytes at a time and treats them as uint16 values. It sums them into another uint16 register, so overflow is normal and ignored.

Parameters:

fullMessage - Byte array of the full message packet

insert - True to insert the computed checksum into fullMessage

Returns:

2-byte checksum