Class XoRoShiRo128Plus
- java.lang.Object
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- org.apache.commons.rng.core.BaseProvider
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- org.apache.commons.rng.core.source64.LongProvider
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- org.apache.commons.rng.core.source64.AbstractXoRoShiRo128
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- org.apache.commons.rng.core.source64.XoRoShiRo128Plus
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- All Implemented Interfaces:
RandomLongSource
,JumpableUniformRandomProvider
,LongJumpableUniformRandomProvider
,RestorableUniformRandomProvider
,UniformRandomProvider
public class XoRoShiRo128Plus extends AbstractXoRoShiRo128
A fast 64-bit generator suitable fordouble
generation. This is slightly faster than the all-purpose generatorXoRoShiRo128StarStar
.This is a member of the Xor-Shift-Rotate family of generators. Memory footprint is 128 bits and the period is 2128-1. Speed is expected to be similar to
XoShiRo256Plus
.- Since:
- 1.3
- See Also:
- Original source code, xorshiro / xoroshiro generators
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Field Summary
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Fields inherited from class org.apache.commons.rng.core.source64.AbstractXoRoShiRo128
state0, state1
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Constructor Summary
Constructors Modifier Constructor Description XoRoShiRo128Plus(long[] seed)
Creates a new instance.XoRoShiRo128Plus(long seed0, long seed1)
Creates a new instance using a 2 element seed.protected
XoRoShiRo128Plus(XoRoShiRo128Plus source)
Creates a copy instance.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected XoRoShiRo128Plus
copy()
Create a copy.protected long
nextOutput()
Use the current state to compute the next output from the generator.-
Methods inherited from class org.apache.commons.rng.core.source64.AbstractXoRoShiRo128
getStateInternal, jump, longJump, next, performJump, setStateInternal
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Methods inherited from class org.apache.commons.rng.core.source64.LongProvider
nextBoolean, 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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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
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Methods inherited from interface org.apache.commons.rng.JumpableUniformRandomProvider
jumps, jumps
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Methods inherited from interface org.apache.commons.rng.LongJumpableUniformRandomProvider
longJumps, longJumps
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Methods inherited from interface org.apache.commons.rng.UniformRandomProvider
doubles, doubles, doubles, doubles, ints, ints, ints, ints, longs, longs, longs, longs, nextBoolean, nextBytes, nextBytes, nextDouble, nextDouble, nextDouble, nextFloat, nextFloat, nextFloat, nextInt, nextInt, nextInt, nextLong, nextLong, nextLong
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Constructor Detail
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XoRoShiRo128Plus
public XoRoShiRo128Plus(long[] 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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XoRoShiRo128Plus
public XoRoShiRo128Plus(long seed0, long 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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XoRoShiRo128Plus
protected XoRoShiRo128Plus(XoRoShiRo128Plus source)
Creates a copy instance.- Parameters:
source
- Source to copy.
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Method Detail
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nextOutput
protected long 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 fromAbstractXoRoShiRo128.next()
before the current state is updated.- Specified by:
nextOutput
in classAbstractXoRoShiRo128
- Returns:
- the next output
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copy
protected XoRoShiRo128Plus copy()
Create a copy.- Specified by:
copy
in classAbstractXoRoShiRo128
- Returns:
- the copy
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