Package org.apache.commons.imaging.formats.png

Class PngCrc

java.lang.Object

org.apache.commons.imaging.formats.png.PngCrc

final class PngCrc
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
private long[]	crcTable
private boolean	crcTableComputed

Constructor Summary

Constructors

Constructor	Description
PngCrc()

Method Summary

Modifier and Type	Method	Description
long	continuePartialCrc(long oldCrc, byte[] buf, int len)
int	crc(byte[] buf, int len)
long	finishPartialCrc(long oldCrc)
private void	makeCrcTable()
long	startPartialCrc(byte[] buf, int len)
private long	updateCrc(long crc, byte[] buf)

Methods inherited from class java.lang.Object

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

Field Detail

crcTable

private final long[] crcTable

crcTableComputed

private boolean crcTableComputed

Constructor Detail

PngCrc

PngCrc()

Method Detail

continuePartialCrc

public long continuePartialCrc(long oldCrc,
                               byte[] buf,
                               int len)

crc

public int crc(byte[] buf,
               int len)

finishPartialCrc

public long finishPartialCrc(long oldCrc)

makeCrcTable

private void makeCrcTable()

startPartialCrc

public long startPartialCrc(byte[] buf,
                            int len)

updateCrc

private long updateCrc(long crc,
                       byte[] buf)