org.getopt.util.hash
Class FNV164

java.lang.Object
  org.getopt.util.hash.FNV1
      org.getopt.util.hash.FNV164

public class FNV164
extends FNV1

Implementation of FNV1 - a fast hash function.

This implementation uses 64-bit operations.

Author:

Andrzej Bialecki <ab@getopt.org>

Field Summary

Fields inherited from class org.getopt.util.hash.FNV1

FNV1_32_INIT, FNV1_64_INIT, hash, INIT

Constructor Summary

FNV164()
Create a hash

Method Summary

protected long

fnv(byte[] buf, int offset, int len, long seed) Compute the hash value.

Methods inherited from class org.getopt.util.hash.FNV1

getHash, init, init, update, update

Methods inherited from class java.lang.Object

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

Constructor Detail

FNV164

public FNV164()

Create a hash

Method Detail

fnv

protected long fnv(byte[] buf,
                   int offset,
                   int len,
                   long seed)

Description copied from class: FNV1

Compute the hash value.

Specified by:

fnv in class FNV1

Parameters:

buf - byte buffer from which to compute the hash

offset - starting position in the buffer

len - number of bytes after the starting position

seed - initial seed (or previous hash value)

Returns:

the next hash value