com.mot.iden.zip
Class Adler32

java.lang.Object
  com.mot.iden.zip.Adler32

All Implemented Interfaces:

Checksum

public class Adler32

extends java.lang.Object

implements Checksum

This API is a Licensee Closed Class and is therefore reserved for use by Motorola and it's Licensees

A class that can be used to compute the Adler-32 checksum of a data stream. An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed much faster.

MOTOROLA and the Stylized M Logo are registered trademarks of Motorola, Inc. Reg. U.S. Pat. & Tm. Off.
© Copyright 2001-2003 Motorola, Inc. All Rights Reserved.

See Also:

Checksum

Constructor Summary

Adler32()
Created a new Adler32 class.

Method Summary

long	getValue() Returns checksum value.
void	reset() Resets checksum to initial value.
void	update(byte[] b) Updates checksum with specified array of bytes.
void	update(byte[] b, int off, int len) Updates checksum with specified array of bytes.
void	update(int b) Updates checksum with specified byte.

Methods inherited from class java.lang.Object

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

Constructor Detail

Adler32

public Adler32()

Created a new Adler32 class.

See Also:

CRC32.CRC32()

Method Detail

update

public void update(byte[] b,
                   int off,
                   int len)

Updates checksum with specified array of bytes.

Specified by:

update in interface Checksum

Parameters:

b - the input data bytes

off - the start offset of the data

len - the length of the data

Throws:

java.lang.NullPointerException - when b is null

ArrayIndexOutofBoundsExcxeption - when array index is invalid

See Also:

CRC32.update(byte[], int, int)

update

public void update(byte[] b)

Updates checksum with specified array of bytes.

Parameters:

b - the input data bytes

Throws:

java.lang.NullPointerException - when b is null

update

public void update(int b)

Updates checksum with specified byte.

Specified by:

update in interface Checksum

Parameters:

b - an array of bytes

reset

public void reset()

Resets checksum to initial value.

Specified by:

reset in interface Checksum

See Also:

CRC32.reset()

getValue

public long getValue()

Returns checksum value.

Specified by:

getValue in interface Checksum

Returns:

(long)adler chedksum value

See Also:

CRC32.getValue()