org.gridfour.util

Class GridfourCRC32C

java.lang.Object

org.gridfour.util.GridfourCRC32C

public class GridfourCRC32C
extends Object

Provides an implementation of the CRC32C checksum based on the Castagnoli polynomial.

The CRC-32C is defined in

    RFC 3720: Internet Small Computer Systems Interface (iSCSI).
 

As of Java 9, the standard Java API provides an implementation of the Java CRC32C. This implementation is included in Gridfour only because Gridfour is intended to support Java 8. If you have the option of operating exclusively in Java 9 or above, you will obtain substantially better performance from the standard API.

Constructor Summary

Constructors

Constructor and Description
GridfourCRC32C()

Method Summary

Modifier and Type	Method and Description
long	getValue() Returns the CRC-32C value
void	reset() Reset the CRC-32C to initial value
void	update(byte[] b) Updates the CRC-32C checksum with the specified array of bytes
void	update(byte[] b, int off, int len) Updates the CRC-32C checksum with the specified array of bytes

Methods inherited from class java.lang.Object

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

Constructor Detail

GridfourCRC32C

public GridfourCRC32C()

Method Detail

update

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

Updates the CRC-32C checksum with the specified array of bytes

Parameters:

b - a valid array of bytes

off - the starting position within the array of bytes

len - the number of bytes to be read from the array

update

public void update(byte[] b)

Updates the CRC-32C checksum with the specified array of bytes

Parameters:

b - a valid array of bytes

getValue

public long getValue()

Returns the CRC-32C value

Returns:

an value int the range of a 32-bit integer.

reset

public void reset()

Reset the CRC-32C to initial value