org.tensorflow.hadoop.util

Class Crc32C

java.lang.Object

org.tensorflow.hadoop.util.Crc32C

All Implemented Interfaces:

Checksum

public class Crc32C
extends Object
implements Checksum

Constructor Summary

Constructors

Constructor and Description
Crc32C()

Method Summary

Modifier and Type	Method and Description
int	getIntValue()
int	getMaskedValue()
long	getValue()
static int	mask(int crc) Return a masked representation of crc.
static int	maskedCrc32c(byte[] data)
static int	maskedCrc32c(byte[] data, int offset, int length)
void	reset()
static int	unmask(int maskedCrc) Return the crc whose masked representation is masked_crc.
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

Crc32C

public Crc32C()

Method Detail

maskedCrc32c

public static int maskedCrc32c(byte[] data)

maskedCrc32c

public static int maskedCrc32c(byte[] data,
                               int offset,
                               int length)

mask

public static int mask(int crc)

Return a masked representation of crc.

Motivation: it is problematic to compute the CRC of a string that contains embedded CRCs. Therefore we recommend that CRCs stored somewhere (e.g., in files) should be masked before being stored.

Parameters:

crc - CRC

Returns:

masked CRC

unmask

public static int unmask(int maskedCrc)

Return the crc whose masked representation is masked_crc.

Parameters:

maskedCrc - masked CRC

Returns:

crc whose masked representation is masked_crc

getMaskedValue

public int getMaskedValue()

getIntValue

public int getIntValue()

update

public void update(int b)

Specified by:

update in interface Checksum

update

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

Specified by:

update in interface Checksum

getValue

public long getValue()

Specified by:

getValue in interface Checksum

reset

public void reset()

Specified by:

reset in interface Checksum