Struct rand_xoshiro::Xoshiro512StarStar

pub struct Xoshiro512StarStar { /* private fields */ }

A xoshiro512** random number generator.

The xoshiro512** algorithm is not suitable for cryptographic purposes, but is very fast and has excellent statistical properties.

The algorithm used here is translated from the xoshiro512starstar.c reference source code by David Blackman and Sebastiano Vigna.

Implementations

impl Xoshiro512StarStar

pub fn jump(&mut self)

Jump forward, equivalently to 2^256 calls to next_u64().

This can be used to generate 2^256 non-overlapping subsequences for parallel computations.

use rand_xoshiro::rand_core::SeedableRng;
use rand_xoshiro::Xoshiro512StarStar;

let rng1 = Xoshiro512StarStar::seed_from_u64(0);
let mut rng2 = rng1.clone();
rng2.jump();
let mut rng3 = rng2.clone();
rng3.jump();

pub fn long_jump(&mut self)

Jump forward, equivalently to 2^384 calls to next_u64().

This can be used to generate 2^128 starting points, from each of which jump() will generate 2^128 non-overlapping subsequences for parallel distributed computations.

Trait Implementations

impl Clone for Xoshiro512StarStar

fn clone(&self) -> Xoshiro512StarStar

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Xoshiro512StarStar

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Xoshiro512StarStar

fn eq(&self, other: &Xoshiro512StarStar) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RngCore for Xoshiro512StarStar

fn next_u32(&mut self) -> u32

Return the next random u32.

fn next_u64(&mut self) -> u64

Return the next random u64.

fn fill_bytes(&mut self, dest: &mut [u8])

Fill dest with random data.

fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error>

Fill dest entirely with random data.

impl SeedableRng for Xoshiro512StarStar

fn from_seed(seed: Seed512) -> Xoshiro512StarStar

Create a new Xoshiro512StarStar. If seed is entirely 0, it will be mapped to a different seed.

fn seed_from_u64(seed: u64) -> Xoshiro512StarStar

Seed a Xoshiro512StarStar from a u64 using SplitMix64.

type Seed = Seed512

Seed type, which is restricted to types mutably-dereferenceable as u8 arrays (we recommend [u8; N] for some N).

fn from_rng<R>(rng: R) -> Result<Self, Error>

where R: RngCore,

Create a new PRNG seeded from another Rng.

fn from_entropy() -> Self

Creates a new instance of the RNG seeded via getrandom.

impl Eq for Xoshiro512StarStar

impl StructuralPartialEq for Xoshiro512StarStar