Module seppiko.commons.utils

Package org.seppiko.commons.utils

Class CRC64ECMA182

java.lang.Object

org.seppiko.commons.utils.CRC64ECMA182

All Implemented Interfaces:

Checksum

public class CRC64ECMA182
extends Object
implements Checksum

CRC64 with ECMA182 http://en.wikipedia.org/wiki/Cyclic_redundancy_check http://www.ecma-international.org/publications/standards/Ecma-182.htm

Author:

Leonard Woo

Constructor Summary

Constructors

Constructor	Description
CRC64ECMA182()	Create CRC64 object and initialization.
CRC64ECMA182(long crc)	Create CRC64 object and initialization.

Method Summary

Modifier and Type	Method	Description
long	getValue()	Returns CRC64 value.
void	reset()	Resets CRC64 to initial value.
void	update(byte[] b, int off, int len)	Updates the CRC64 checksum with the specified array of bytes.
void	update(int b)	Updates the CRC64 checksum with the specified byte.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.zip.Checksum

update, update

Constructor Details

CRC64ECMA182

public CRC64ECMA182()

Create CRC64 object and initialization.

CRC64ECMA182

public CRC64ECMA182(long crc)

Create CRC64 object and initialization.

Parameters:

crc - initialize value

Method Details

update

public void update(int b)

Updates the CRC64 checksum with the specified byte.

Specified by:

update in interface Checksum

Parameters:

b - number

update

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

Updates the CRC64 checksum with the specified array of bytes.

Specified by:

update in interface Checksum

Parameters:

b - data

off - data init offset

len - data length

Throws:

NullPointerException - data is null

ArrayIndexOutOfBoundsException - if off is negative, or len is negative, or off+len is * negative or greater than the length of the array b

getValue

public long getValue()

Returns CRC64 value.

Specified by:

getValue in interface Checksum

Returns:

CRC64

reset

public void reset()

Resets CRC64 to initial value.

Specified by:

reset in interface Checksum