com.twofivesix
Class JenkinsHash

java.lang.Object
  com.twofivesix.JenkinsHash

public class JenkinsHash
extends java.lang.Object

Hash algorithm by Bob Jenkins, 1996. You may use this code any way you wish, private, educational, or commercial. It's free. See: http://burtleburtle.net/bob/hash/doobs.html Use for hash table lookup, or anything where one collision in 2^^32 is acceptable. Do NOT use for cryptographic purposes. Java port by Gray Watson http://256stuff.com/gray/

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

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

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.