Class XoShiRo256StarStar

All Implemented Interfaces:
RandomLongSource, JumpableUniformRandomProvider, LongJumpableUniformRandomProvider, RestorableUniformRandomProvider, UniformRandomProvider

public class XoShiRo256StarStar extends AbstractXoShiRo256
A fast all-purpose 64-bit generator.

This is a member of the Xor-Shift-Rotate family of generators. Memory footprint is 256 bits and the period is 2256-1.

Since:
1.3
See Also:
  • Constructor Details

    • XoShiRo256StarStar

      public XoShiRo256StarStar(long[] seed)
      Creates a new instance.
      Parameters:
      seed - Initial seed. If the length is larger than 4, only the first 4 elements will be used; if smaller, the remaining elements will be automatically set. A seed containing all zeros will create a non-functional generator.
    • XoShiRo256StarStar

      public XoShiRo256StarStar(long seed0, long seed1, long seed2, long seed3)
      Creates a new instance using a 4 element seed. A seed containing all zeros will create a non-functional generator.
      Parameters:
      seed0 - Initial seed element 0.
      seed1 - Initial seed element 1.
      seed2 - Initial seed element 2.
      seed3 - Initial seed element 3.
    • XoShiRo256StarStar

      protected XoShiRo256StarStar(XoShiRo256StarStar source)
      Creates a copy instance.
      Parameters:
      source - Source to copy.
  • Method Details

    • 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 from AbstractXoShiRo256.next() before the current state is updated.
      Specified by:
      nextOutput in class AbstractXoShiRo256
      Returns:
      the next output
    • copy

      protected XoShiRo256StarStar copy()
      Create a copy.
      Specified by:
      copy in class AbstractXoShiRo256
      Returns:
      the copy