Package com.google.common.hash

Class Crc32cHashFunction.Crc32cHasher

java.lang.Object

com.google.common.hash.AbstractHasher

com.google.common.hash.AbstractStreamingHasher

com.google.common.hash.Crc32cHashFunction.Crc32cHasher

All Implemented Interfaces:

Hasher, PrimitiveSink

Enclosing class:

Crc32cHashFunction

static final class Crc32cHashFunction.Crc32cHasher
extends AbstractStreamingHasher

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static int[]	BYTE_TABLE
private int	crc0
private int	crc1
private int	crc2
private int	crc3
private static java.nio.ByteBuffer	EMPTY
private boolean	finished
(package private) static int	INVERSE_COMPUTE_FOR_WORD_OF_ALL_1S
(package private) static int[][]	STRIDE_TABLE

Constructor Summary

Constructors

Constructor	Description
Crc32cHasher()

Method Summary

Modifier and Type	Method	Description
(package private) static int	combine(int csum, int crc)
(package private) static int	computeForWord(int word)
protected HashCode	makeHash()	Computes a hash code based on the data that have been provided to this hasher.
protected void	process(java.nio.ByteBuffer bb)	Processes the available bytes of the buffer (at most chunk bytes).
protected void	processRemaining(java.nio.ByteBuffer bb)	This is invoked for the last bytes of the input, which are not enough to fill a whole chunk.

Methods inherited from class com.google.common.hash.AbstractStreamingHasher

hash, putByte, putBytes, putBytes, putChar, putInt, putLong, putShort

Methods inherited from class com.google.common.hash.AbstractHasher

putBoolean, putBytes, putDouble, putFloat, putObject, putString, putUnencodedChars

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.common.hash.Hasher

hashCode

Field Detail

finished

private boolean finished

crc0

private int crc0

crc1

private int crc1

crc2

private int crc2

crc3

private int crc3

BYTE_TABLE

static final int[] BYTE_TABLE

STRIDE_TABLE

static final int[][] STRIDE_TABLE

INVERSE_COMPUTE_FOR_WORD_OF_ALL_1S

static final int INVERSE_COMPUTE_FOR_WORD_OF_ALL_1S

See Also:

Constant Field Values

EMPTY

private static final java.nio.ByteBuffer EMPTY

Constructor Detail

Crc32cHasher

Crc32cHasher()

Method Detail

process

protected void process(java.nio.ByteBuffer bb)

Description copied from class: AbstractStreamingHasher

Processes the available bytes of the buffer (at most chunk bytes).

Specified by:

process in class AbstractStreamingHasher

processRemaining

protected void processRemaining(java.nio.ByteBuffer bb)

Description copied from class: AbstractStreamingHasher

This is invoked for the last bytes of the input, which are not enough to fill a whole chunk. The passed ByteBuffer is guaranteed to be non-empty.

This implementation simply pads with zeros and delegates to AbstractStreamingHasher.process(ByteBuffer).

Overrides:

processRemaining in class AbstractStreamingHasher

makeHash

protected HashCode makeHash()

Description copied from class: AbstractStreamingHasher

Computes a hash code based on the data that have been provided to this hasher. This is called after all chunks are handled with AbstractStreamingHasher.process(java.nio.ByteBuffer) and any leftover bytes that did not make a complete chunk are handled with AbstractStreamingHasher.processRemaining(java.nio.ByteBuffer).

Specified by:

makeHash in class AbstractStreamingHasher

computeForWord

static int computeForWord(int word)

combine

static int combine(int csum,
                   int crc)