com.mot.iden.zip
Class CRC32

java.lang.Object
  com.mot.iden.zip.CRC32

All Implemented Interfaces:

Checksum

public class CRC32

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 CRC-32 of a data stream.

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

CRC32()
Creates a new CRC32 class.

Method Summary

long	getValue() Returns CRC-32 value.
void	reset() Resets CRC-32 to initial value.
void	update(byte[] b) Updates checksum with specified array of bytes.
void	update(byte[] b, int off, int len) Updates CRC-32 with specified array of bytes.
void	update(int b) Updates CRC-32 with specified byte.

Methods inherited from class java.lang.Object

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

Constructor Detail

CRC32

public CRC32()

Creates a new CRC32 class.

See Also:

Adler32.Adler32()

Method Detail

update

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

Updates CRC-32 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

ArrayIndexOutofBoundsException - if array index is invalid

See Also:

Adler32.update(byte[], int, int)

update

public void update(byte[] b)

Updates checksum with specified array of bytes.

Parameters:

b - the array of bytes to update the checksum with

Throws:

java.lang.NullPointerException - when b is null

update

public void update(int b)

Updates CRC-32 with specified byte.

Specified by:

update in interface Checksum

Parameters:

b - the byte to update the checksum with

reset

public void reset()

Resets CRC-32 to initial value.

Specified by:

reset in interface Checksum

See Also:

Adler32.reset()

getValue

public long getValue()

Returns CRC-32 value.

Specified by:

getValue in interface Checksum

Returns:

(long)crc checksum value

See Also:

Adler32.getValue()