smile.hash

Class MurmurHash3

java.lang.Object

smile.hash.MurmurHash3

public class MurmurHash3
extends java.lang.Object

MurmurHash is a very fast, non-cryptographic hash suitable for general hash-based lookup. The name comes from two basic operations, multiply (MU) and rotate (R), used in its inner loop. See http://murmurhash.googlepages.com/ for more details.

The current version is MurmurHash3, which yields a 32-bit or 128-bit hash value. When using 128-bits, the x86 and x64 versions do not produce the same values, as the algorithms are optimized for their respective platforms.

This class is adapted from Apache Cassandra.

Constructor Summary

Constructors

Constructor and Description
MurmurHash3()

Method Summary

Modifier and Type	Method and Description
static void	hash128(java.nio.ByteBuffer key, int offset, int length, long seed, long[] result) 128-bit MurmurHash3 for x64.
static int	hash32(byte[] data, int offset, int len, int seed) 32-bit MurmurHash3.

Methods inherited from class java.lang.Object

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

Constructor Detail

MurmurHash3

public MurmurHash3()

Method Detail

hash32

public static int hash32(byte[] data,
                         int offset,
                         int len,
                         int seed)

32-bit MurmurHash3.

hash128

public static void hash128(java.nio.ByteBuffer key,
                           int offset,
                           int length,
                           long seed,
                           long[] result)

128-bit MurmurHash3 for x64. When using 128-bits, the x86 and x64 versions do not produce the same values, as the algorithms are optimized for their respective platforms.