forked from rust-random/rand
/
lib.rs
97 lines (92 loc) · 4.53 KB
/
lib.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
// Copyright 2018 Developers of the Rand project.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! This crate implements the [xoshiro] family of pseudorandom number generators
//! designed by David Blackman and Sebastiano Vigna. They feature high
//! perfomance and a small state and superseed the previous xorshift-based
//! generators. However, they are no cryptographically secure and their output
//! can be predicted by observing a few samples.
//!
//! The following generators are implemented:
//!
//! # 64-bit generators
//! - [`Xoshiro256StarStar`]: Recommended for all purposes. Excellent speed and
//! a state space (256 bits) large enough for any parallel application.
//! - [`Xoshiro256Plus`]: Recommended for generating 64-bit floating-point
//! numbers. About 15% faster than `Xoshiro256StarStar`, but has a [low linear
//! complexity] in the lowest bits (which are discarded when generating
//! floats), making it fail linearity tests. This is unlikely to have any
//! impact in practise.
//! - [`Xoroshiro128StarStar`]: An alternative to `Xoshiro256StarStar`, having
//! the same speed but using half the state. Only suited for low-scale parallel
//! applications.
//! - [`Xoroshiro128Plus`]: An alternative to `Xoshiro256Plus`, having the same
//! speed but using half the state. Only suited for low-scale parallel
//! applications. Has a [low linear complexity] in the lowest bits (which are
//! discarded when generating floats), making it fail linearity tests. This is
//! unlikely to have any impact in practise.
//! - [`Xoshiro512StarStar`]: An alternative to `Xoshiro256StarStar` with more
//! state and the same speed.
//! - [`Xoshiro512Plus`]: An alternative to `Xoshiro512Plus` with more
//! state and the same speed. Has a [low linear complexity] in the lowest bits
//! (which are discarded when generating floats), making it fail linearity
//! tests. This is unlikely to have any impact in practise.
//! - [`SplitMix64`]: Recommended for initializing generators of the xoshiro
//! familiy from a 64-bit seed. Used for implementing `seed_from_u64`.
//!
//! # 32-bit generators
//! - [`Xoshiro128StarStar`]: Recommended for all purposes. Excellent speed.
//! - [`Xoshiro128Plus`]: Recommended for generating 32-bit floating-point
//! numbers. Faster than `Xoshiro128StarStar`, but has a [low linear
//! complexity] in the lowest bits (which are discarded when generating
//! floats), making it fail linearity tests. This is unlikely to have any
//! impact in practise.
//! - [`Xoroshiro64StarStar`]: An alternative to `Xoshiro128StarStar`, having
//! the same speed but using half the state.
//! - [`Xoroshiro64Star`]: An alternative to `Xoshiro128Plus`, having the
//! same speed but using half the state. Has a [low linear complexity] in the
//! lowest bits (which are discarded when generating floats), making it fail
//! linearity tests. This is unlikely to have any impact in practise.
//!
//! [xoshiro]: http://xoshiro.di.unimi.it/
//! [low linear complexity]: http://xoshiro.di.unimi.it/lowcomp.php
#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
html_favicon_url = "https://www.rust-lang.org/favicon.ico",
html_root_url = "https://docs.rs/rand_xoshiro/0.2.1")]
#![deny(missing_docs)]
#![deny(missing_debug_implementations)]
#![cfg_attr(feature = "cargo-clippy", allow(unreadable_literal))]
#![no_std]
extern crate byteorder;
pub extern crate rand_core;
#[cfg(feature="serde1")] extern crate serde;
#[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
#[macro_use]
mod common;
mod splitmix64;
mod xoshiro128starstar;
mod xoshiro128plus;
mod xoshiro256starstar;
mod xoshiro256plus;
mod xoshiro512starstar;
mod xoshiro512plus;
mod xoroshiro128plus;
mod xoroshiro128starstar;
mod xoroshiro64starstar;
mod xoroshiro64star;
pub use splitmix64::SplitMix64;
pub use xoshiro128starstar::Xoshiro128StarStar;
pub use xoshiro128plus::Xoshiro128Plus;
pub use xoshiro256starstar::Xoshiro256StarStar;
pub use xoshiro256plus::Xoshiro256Plus;
pub use common::Seed512;
pub use xoshiro512starstar::Xoshiro512StarStar;
pub use xoshiro512plus::Xoshiro512Plus;
pub use xoroshiro128plus::Xoroshiro128Plus;
pub use xoroshiro128starstar::Xoroshiro128StarStar;
pub use xoroshiro64starstar::Xoroshiro64StarStar;
pub use xoroshiro64star::Xoroshiro64Star;