com.temesoft.google.pr
Class JenkinsHash

java.lang.Object
  com.temesoft.google.pr.JenkinsHash

public class JenkinsHash

extends java.lang.Object

This is a Bob Jenkins hashing algorithm implementation
These are functions for producing 32-bit hashes for hash table lookup. hashword(), hashlittle(), hashlittle2(), hashbig(), mix(), and final() are externally useful functions. Routines to test the hash are included if SELF_TEST is defined. You can use this free for any purpose. It's in the public domain. It has no warranty.

Field Summary

(package private) long	a
(package private) long	b
(package private) long	c

Constructor Summary

JenkinsHash()

Method Summary

long	hash(byte[] buffer) See hash(byte[] buffer, long initialValue)
long	hash(byte[] buffer, long initialValue) Hash a variable-length key into a 32-bit value.

Methods inherited from class java.lang.Object

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

Field Detail

a

long a

b

long b

c

long c

Constructor Detail

JenkinsHash

public JenkinsHash()

Method Detail

hash

public long hash(byte[] buffer,
                 long initialValue)

Hash a variable-length key into a 32-bit value. Every bit of the key affects every bit of the return value. Every 1-bit and 2-bit delta achieves avalanche. The best hash table sizes are powers of 2.

Parameters:

buffer - Byte array that we are hashing on.

initialValue - Initial value of the hash if we are continuing from a previous run. 0 if none.

Returns:

Hash value for the buffer.

hash

public long hash(byte[] buffer)

See hash(byte[] buffer, long initialValue)

Parameters:

buffer - Byte array that we are hashing on.

Returns:

Hash value for the buffer.