DotyHumphreySmallFastCounting64 (Apache Commons RNG Core 1.6 API)

java.lang.Object
- org.apache.commons.rng.core.BaseProvider
- - org.apache.commons.rng.core.source64.LongProvider
  - - org.apache.commons.rng.core.source64.DotyHumphreySmallFastCounting64

All Implemented Interfaces:

RandomLongSource, RestorableUniformRandomProvider, UniformRandomProvider
```
public class DotyHumphreySmallFastCounting64
extends LongProvider
```
Implement the Small, Fast, Counting (SFC) 64-bit generator of Chris Doty-Humphrey. The original source is the PractRand test suite by the same author.
The state size is 256-bits; the period is a minimum of 2⁶⁴ and an average of approximately 2²⁵⁵.

Since:

1.3

See Also:

PractRand

Constructor Summary

Constructors
Constructor Description

DotyHumphreySmallFastCounting64(long[] seed)
Creates an instance with the given seed.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected byte[]`	`getStateInternal()`	Creates a snapshot of the RNG state.
`long`	`next()`	Return the next random value.
`protected void`	`setStateInternal(byte[] s)`	Resets the RNG to the given `state`.

Methods inherited from class org.apache.commons.rng.core.source64.LongProvider
nextBoolean, nextInt, nextLong, resetCachedState

Methods inherited from class org.apache.commons.rng.core.BaseProvider
checkIndex, checkStateSize, composeStateInternal, extendSeed, extendSeed, fillState, fillState, restoreState, saveState, splitStateInternal, toString

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

Methods inherited from interface org.apache.commons.rng.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

- Constructor Detail
  - DotyHumphreySmallFastCounting64
```
public DotyHumphreySmallFastCounting64(long[] seed)
```
    Creates an instance with the given seed.
    
    Parameters:
    
    seed - Initial seed. If the length is larger than 3, only the first 3 elements will be used; if smaller, the remaining elements will be automatically set.
- Method Detail
  - 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)