Package com.gengoai.math

Class HashingFunctions

java.lang.Object

com.gengoai.math.HashingFunctions

public class HashingFunctions
extends Object

Taken from commons-codec MurmurHash3.java

Constructor Summary

Constructors

Constructor	Description
HashingFunctions()

Method Summary

Modifier and Type	Method	Description
static int	hash32x86(byte[] data)	Generates 32-bit hash from the byte array with a seed of zero.
static int	hash32x86(byte[] data, int offset, int length, int seed)	Generates 32-bit hash from the byte array with the given offset, length and seed.

Methods inherited from class java.lang.Object

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

Constructor Detail

HashingFunctions

public HashingFunctions()

Method Detail

hash32x86

public static int hash32x86(byte[] data)

Generates 32-bit hash from the byte array with a seed of zero. This is a helper method that will produce the same result as:

 int offset = 0;
 int seed = 0;
 int hash = MurmurHash3.hash32x86(data, offset, data.length, seed);
 

Parameters:

data - The input byte array

Returns:

The 32-bit hash

Since:

1.14

See Also:

hash32x86(byte[], int, int, int)

hash32x86

public static int hash32x86(byte[] data,
                            int offset,
                            int length,
                            int seed)

Generates 32-bit hash from the byte array with the given offset, length and seed.

This is an implementation of the 32-bit hash function MurmurHash3_x86_32 from from Austin Applyby's original MurmurHash3 c++ code in SMHasher.

Parameters:

data - The input byte array

offset - The offset of data

length - The length of array

seed - The initial seed value

Returns:

The 32-bit hash

Since:

1.14