JenkinsSmallFast64

java.lang.Object

org.apache.commons.rng.core.BaseProvider

org.apache.commons.rng.core.source64.LongProvider

org.apache.commons.rng.core.source64.JenkinsSmallFast64

All Implemented Interfaces:: RandomLongSource, RestorableUniformRandomProvider, UniformRandomProvider

public class JenkinsSmallFast64 extends LongProvider

Implement Bob Jenkins's small fast (JSF) 64-bit generator.

The state size is 256-bits.

Since:

1.3

See Also:

Field Summary

Fields

Modifier and Type

Field

Description

private long

a

State a.

private long

b

State b.

private long

c

State c.

private long

d

Statd d.
Constructor Summary

Constructors

Constructor

Description

JenkinsSmallFast64(Long seed)

Creates an instance with the given seed.
Method Summary

Modifier and Type

Method

Description

protected byte[]

getStateInternal()

Creates a snapshot of the RNG state.

final long

next()

Return the next random value.

private void

setSeedInternal(long seed)

Seeds the RNG.

protected void

setStateInternal(byte[] s)

Resets the RNG to the given state.

Methods inherited from class LongProvider
nextBoolean, nextInt, nextLong, resetCachedState

Methods inherited from class BaseProvider
checkIndex, checkStateSize, composeStateInternal, extendSeed, extendSeed, fillState, fillState, restoreState, saveState, splitStateInternal, toString

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface UniformRandomProvider
doubles, doubles, doubles, doubles, ints, ints, ints, ints, longs, longs, longs, longs, nextBytes, nextBytes, nextDouble, nextDouble, nextDouble, nextFloat, nextFloat, nextFloat, nextInt, nextInt, nextLong, nextLong

Field Details
- a
  
  private long a
  
  State a.
- b
  
  private long b
  
  State b.
- c
  
  private long c
  
  State c.
- d
  
  private long d
  
  Statd d.
Constructor Details
- JenkinsSmallFast64
  
  public JenkinsSmallFast64(Long seed)
  
  Creates an instance with the given seed.
  
  Parameters:
  
  seed - Initial seed.
Method Details
- setSeedInternal
  
  private void setSeedInternal(long seed)
  
  Seeds the RNG.
  
  Parameters:
  
  seed - Seed.
- next
  
  public final long next()
  
  Return the next random value.
  
  Returns:
  
  the next random value.
- getStateInternal
  
  protected byte[] getStateInternal()
  
  Creates a snapshot of the RNG state.
  
  Overrides:
  
  getStateInternal in class LongProvider
  
  Returns:
  
  the internal state.
- setStateInternal
  protected void setStateInternal(byte[] s)
  
  Resets the RNG to the given state.
  
  Overrides:
  
  setStateInternal in class LongProvider
  
  Parameters:
  
  s - State (previously obtained by a call to BaseProvider.getStateInternal()).
  
  See Also:
  
  BaseProvider.checkStateSize(byte[],int)