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

Class PngCrc

java.lang.Object

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

class PngCrc
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
private long[]	crc_table
private boolean	crc_table_computed

Constructor Summary

Constructors

Constructor	Description
PngCrc()

Method Summary

Modifier and Type	Method	Description
long	continue_partial_crc(long old_crc, byte[] buf, int len)
int	crc(byte[] buf, int len)
long	finish_partial_crc(long old_crc)
private void	make_crc_table()
long	start_partial_crc(byte[] buf, int len)
private long	update_crc(long crc, byte[] buf)

Methods inherited from class java.lang.Object

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

Field Detail

crc_table

private final long[] crc_table

crc_table_computed

private boolean crc_table_computed

Constructor Detail

PngCrc

PngCrc()

Method Detail

make_crc_table

private void make_crc_table()

update_crc

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

crc

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

start_partial_crc

public final long start_partial_crc(byte[] buf,
                                    int len)

continue_partial_crc

public final long continue_partial_crc(long old_crc,
                                       byte[] buf,
                                       int len)

finish_partial_crc

public final long finish_partial_crc(long old_crc)