org.jruby.util
Class CRC32Ext

java.lang.Object
  org.jruby.util.CRC32Ext

All Implemented Interfaces:

java.util.zip.Checksum

public class CRC32Ext
extends java.lang.Object
implements java.util.zip.Checksum

This class is a wrapper around Adler32 which provides the capability to update the running total. This functionality is provided by quite risky reflection and should be fixed in a better way later on.

Constructor Summary

CRC32Ext()
Creates the basic object with default initial adler.

CRC32Ext(int crc)
Creates the basic object with the adler provided.

Method Summary

long	getValue()
void	reset()
void	setAdler(int crc) Sets the adler running total to the specified value.
void	update(byte[] b)
void	update(byte[] b, int off, int len)
void	update(int b)

Methods inherited from class java.lang.Object

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

Constructor Detail

CRC32Ext

public CRC32Ext()

Creates the basic object with default initial adler.

CRC32Ext

public CRC32Ext(int crc)

Creates the basic object with the adler provided.

Parameters:

adler - the number to use as starting point for the CRC-32 algorithm

Method Detail

setAdler

public void setAdler(int crc)

Sets the adler running total to the specified value.

Parameters:

adler - the number to use as current value for the CRC-32 algorithm

update

public void update(int b)

Specified by:

update in interface java.util.zip.Checksum

See Also:

Checksum.update(int)

update

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

Specified by:

update in interface java.util.zip.Checksum

See Also:

Checksum.update(int)

update

public void update(byte[] b)

See Also:

Checksum.update(int)

reset

public void reset()

Specified by:

reset in interface java.util.zip.Checksum

See Also:

Checksum.reset()

getValue

public long getValue()

Specified by:

getValue in interface java.util.zip.Checksum

See Also:

Checksum.getValue()