org.xerial.snappy

Class PureJavaCrc32C

java.lang.Object

org.xerial.snappy.PureJavaCrc32C

All Implemented Interfaces:

java.util.zip.Checksum

public class PureJavaCrc32C
extends java.lang.Object
implements java.util.zip.Checksum

A pure-java implementation of the CRC32 checksum that uses the CRC32-C polynomial, the same polynomial used by iSCSI and implemented on many Intel chipsets supporting SSE4.2.

Field Summary

Fields

Modifier and Type	Field and Description
private int	crc the current CRC value, bit-flipped
(package private) static int[]	T8_0
(package private) static int[]	T8_1
(package private) static int[]	T8_2
(package private) static int[]	T8_3
(package private) static int[]	T8_4
(package private) static int[]	T8_5
(package private) static int[]	T8_6
(package private) static int[]	T8_7

Constructor Summary

Constructors

Constructor and Description
PureJavaCrc32C() Create a new PureJavaCrc32 object.

Method Summary

Modifier and Type	Method and Description
int	getIntegerValue()
long	getValue()
void	reset()
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

Field Detail

crc

private int crc

the current CRC value, bit-flipped

T8_0

static final int[] T8_0

T8_1

static final int[] T8_1

T8_2

static final int[] T8_2

T8_3

static final int[] T8_3

T8_4

static final int[] T8_4

T8_5

static final int[] T8_5

T8_6

static final int[] T8_6

T8_7

static final int[] T8_7

Constructor Detail

PureJavaCrc32C

public PureJavaCrc32C()

Create a new PureJavaCrc32 object.

Method Detail

getIntegerValue

public int getIntegerValue()

getValue

public long getValue()

Specified by:

getValue in interface java.util.zip.Checksum

reset

public void reset()

Specified by:

reset in interface java.util.zip.Checksum

update

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

Specified by:

update in interface java.util.zip.Checksum

update

public final void update(int b)

Specified by:

update in interface java.util.zip.Checksum