org.opengts.util
Class FletcherChecksum

java.lang.Object
  org.opengts.util.FletcherChecksum

public class FletcherChecksum
extends java.lang.Object

This class calculates a Fletcher checksum

Constructor Summary

FletcherChecksum()
Constructor

FletcherChecksum(byte[] b)
Constructor

Method Summary

byte[]	getChecksum() Gets the current value of the checksum
int	getChecksumAsInt() Returns the current value of the checksum as an integer
int[]	getValues() Returns the current values of the checksum accumulator.
boolean	isValid() Returns true if the current checksum is valid
static void	main(java.lang.String[] argv) Command-line entry point (bug/testing purposes)
void	reset() Resets the internal Fletcher checksum accumulator
void	runningChecksum(byte b) Adds the specified byte to the current running checksum accumulator.
void	runningChecksum(byte[] b) Adds the specified byte array to the current running checksum accumulator.
void	runningChecksum(java.lang.String s) Adds the bytes from the specified String to the current running checksum accumulator.

Methods inherited from class java.lang.Object

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

Constructor Detail

FletcherChecksum

public FletcherChecksum()

Constructor

FletcherChecksum

public FletcherChecksum(byte[] b)

Constructor

Parameters:

b - The initial byte array

Method Detail

reset

public void reset()

Resets the internal Fletcher checksum accumulator

getValues

public int[] getValues()

Returns the current values of the checksum accumulator.

Returns:

A 2-integer array containing the current values of the checksum accumulator.

isValid

public boolean isValid()

Returns true if the current checksum is valid

Returns:

True if the current checksum is valid, false if invalid.

getChecksum

public byte[] getChecksum()

Gets the current value of the checksum

Returns:

A 2-byte array containing the checksum

getChecksumAsInt

public int getChecksumAsInt()

Returns the current value of the checksum as an integer

Returns:

The current value of the checksum as an integer

runningChecksum

public void runningChecksum(byte b)

Adds the specified byte to the current running checksum accumulator.

Parameters:

b - The byte to add to the current running checksum accumulator.

runningChecksum

public void runningChecksum(byte[] b)

Adds the specified byte array to the current running checksum accumulator.

Parameters:

b - The byte array to add to the current running checksum accumulator.

runningChecksum

public void runningChecksum(java.lang.String s)

Adds the bytes from the specified String to the current running checksum accumulator.

Parameters:

s - The String to add to the current running checksum accumulator.

main

public static void main(java.lang.String[] argv)

Command-line entry point (bug/testing purposes)

Parameters:

argv - The command-line arguments