Class XoRoShiRo64Star
- java.lang.Object
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- org.apache.commons.rng.core.BaseProvider
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- org.apache.commons.rng.core.source32.IntProvider
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- org.apache.commons.rng.core.source32.XoRoShiRo64Star
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- All Implemented Interfaces:
RandomIntSource
,RestorableUniformRandomProvider
,UniformRandomProvider
public class XoRoShiRo64Star extends IntProvider
A fast 32-bit generator suitable forfloat
generation. This is slightly faster than the all-purpose generatorXoRoShiRo64StarStar
.This is a member of the Xor-Shift-Rotate family of generators. Memory footprint is 64 bits.
- Since:
- 1.3
- See Also:
- Original source code, xorshiro / xoroshiro generators
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Constructor Summary
Constructors Constructor Description XoRoShiRo64Star(int[] seed)
Creates a new instance.XoRoShiRo64Star(int seed0, int seed1)
Creates a new instance using a 2 element seed.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected byte[]
getStateInternal()
Creates a snapshot of the RNG state.int
next()
protected int
nextOutput()
Use the current state to compute the next output from the generator.protected void
setStateInternal(byte[] s)
Resets the RNG to the givenstate
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Methods inherited from class org.apache.commons.rng.core.source32.IntProvider
nextBoolean, nextBytes, nextBytes, nextDouble, nextInt, nextLong, resetCachedState
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Methods inherited from class org.apache.commons.rng.core.BaseProvider
checkIndex, checkStateSize, composeStateInternal, extendSeed, extendSeed, fillState, fillState, restoreState, saveState, splitStateInternal, toString
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Constructor Detail
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XoRoShiRo64Star
public XoRoShiRo64Star(int[] seed)
Creates a new instance.- Parameters:
seed
- Initial seed. If the length is larger than 2, only the first 2 elements will be used; if smaller, the remaining elements will be automatically set. A seed containing all zeros will create a non-functional generator.
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XoRoShiRo64Star
public XoRoShiRo64Star(int seed0, int seed1)
Creates a new instance using a 2 element seed. A seed containing all zeros will create a non-functional generator.- Parameters:
seed0
- Initial seed element 0.seed1
- Initial seed element 1.
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Method Detail
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nextOutput
protected int nextOutput()
Use the current state to compute the next output from the generator. The output function shall vary with respect to different generators. This method is called fromRandomIntSource.next()
before the current state is updated.- Returns:
- the next output
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getStateInternal
protected byte[] getStateInternal()
Creates a snapshot of the RNG state.- Overrides:
getStateInternal
in classIntProvider
- Returns:
- the internal state.
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setStateInternal
protected void setStateInternal(byte[] s)
Resets the RNG to the givenstate
.- Overrides:
setStateInternal
in classIntProvider
- Parameters:
s
- State (previously obtained by a call toBaseProvider.getStateInternal()
).- See Also:
BaseProvider.checkStateSize(byte[],int)
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next
public int next()
- Returns:
- the next random value.
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