mt19937

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Published: May 17, 2019 License: MIT Imports: 0 Imported by: 10

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type MT19937

type MT19937 struct {
	// contains filtered or unexported fields
}

MT19937 is the structure to hold the state of one instance of the Mersenne Twister PRNG. New instances can be allocated using the mt19937.New() function. MT19937 implements the rand.Source interface and rand.New() from the math/rand package can be used to generate different distributions from a MT19937 PRNG.

This class is not safe for concurrent accesss by different goroutines. If more than one goroutine accesses the PRNG, the callers must synchronise access using sync.Mutex or similar.

func New

func New() *MT19937

New allocates a new instance of the 64bit Mersenne Twister. A seed can be set using the .Seed() or .SeedFromSlice() methods. If no seed is set explicitly, a default seed is used instead.

func (*MT19937) Int63

func (mt *MT19937) Int63() int64

Int63 generates a (pseudo-)random 63bit value. The output can be used as a replacement for a sequence of independent, uniformly distributed samples in the range 0, 1, ..., 2^63-1. This method is part of the rand.Source interface.

func (*MT19937) Read

func (mt *MT19937) Read(p []byte) (n int, err error)

Read fills `p` with (pseudo-)random bytes. This method implements the io.Reader interface. The returned length `n` always equals `len(p)` and `err` is always nil.

func (*MT19937) Seed

func (mt *MT19937) Seed(seed int64)

Seed uses the given 64bit value to initialise the generator state. This method is part of the rand.Source interface.

func (*MT19937) SeedFromSlice

func (mt *MT19937) SeedFromSlice(key []uint64)

SeedFromSlice uses the given slice of 64bit values to set the generator state.

func (*MT19937) Uint64

func (mt *MT19937) Uint64() uint64

Uint64 generates a (pseudo-)random 64bit value. The output can be used as a replacement for a sequence of independent, uniformly distributed samples in the range 0, 1, ..., 2^64-1. This method is part of the rand.Source64 interface.

type RandUniform

type RandUniform struct {
	// contains filtered or unexported fields
}

////////////////////////////

func RandUniformInit

func RandUniformInit(seed int64) *RandUniform

func (*RandUniform) Uniform

func (Ruf *RandUniform) Uniform(low, high float64) float64

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