Move XorShiftRng to its own crate

Cargo.toml

@@ -20,19 +20,20 @@ appveyor = { repository = "alexcrichton/rand" }
 [features]
 default = ["std" ] # without "std" rand uses libcore
 nightly = ["i128_support", "simd_support"] # enables all features requiring nightly rust
-std = ["rand_core/std", "alloc", "libc", "winapi", "cloudabi", "fuchsia-zircon"]
+std = ["rand_core/std", "rand_isaac/std", "rand_xorshift/std", "alloc", "libc", "winapi", "cloudabi", "fuchsia-zircon"]
 alloc = ["rand_core/alloc"]  # enables Vec and Box support (without std)
 i128_support = [] # enables i128 and u128 support
 simd_support = [] # enables SIMD support
-serde1 = ["serde", "serde_derive", "rand_core/serde1"] # enables serialization for PRNGs
+serde1 = ["serde", "serde_derive", "rand_core/serde1", "rand_isaac/serde1", "rand_xorshift/serde1"] # enables serialization for PRNGs
 
 [workspace]
-members = ["rand_core", "rand_isaac"]
+members = ["rand_core", "rand_isaac", "rand_xorshift"]
 
 [dependencies]
 rand_core = { path = "rand_core", version = "0.2", default-features = false }
 # only for deprecations and benches:
-rand_isaac = { path = "rand_isaac", version = "0.1", default-features = false }
+rand_isaac = { path = "rand_isaac", version = "0.1" }
+rand_xorshift = { path = "rand_xorshift", version = "0.1" }
 log = { version = "0.4", optional = true }
 serde = { version = "1", optional = true }
 serde_derive = { version = "1", optional = true }

benches/distributions.rs

@@ -4,14 +4,15 @@
 
 extern crate test;
 extern crate rand;
+extern crate rand_xorshift;
 
 const RAND_BENCH_N: u64 = 1000;
 
 use std::mem::size_of;
 use test::Bencher;
 
 use rand::{Rng, FromEntropy};
-use rand::prng::XorShiftRng;
+use rand_xorshift::XorShiftRng;
 use rand::distributions::*;
 
 macro_rules! distr_int {

benches/generators.rs

@@ -3,6 +3,7 @@
 extern crate test;
 extern crate rand;
 extern crate rand_isaac;
+extern crate rand_xorshift;
 
 const RAND_BENCH_N: u64 = 1000;
 const BYTES_LEN: usize = 1024;
@@ -11,11 +12,12 @@ use std::mem::size_of;
 use test::{black_box, Bencher};
 
 use rand::prelude::*;
-use rand::prng::{XorShiftRng, Hc128Rng, ChaChaRng};
+use rand::prng::{Hc128Rng, ChaChaRng};
 use rand::prng::hc128::Hc128Core;
 use rand::rngs::adapter::ReseedingRng;
 use rand::rngs::{OsRng, JitterRng, EntropyRng};
 use rand_isaac::{IsaacRng, Isaac64Rng};
+use rand_xorshift::XorShiftRng;
 
 macro_rules! gen_bytes {
     ($fnn:ident, $gen:expr) => {

rand_isaac/Cargo.toml

@@ -18,9 +18,15 @@ travis-ci = { repository = "rust-lang-nursery/rand" }
 appveyor = { repository = "alexcrichton/rand" }
 
 [features]
-serde1 = ["serde", "serde_derive"] # enables serde for BlockRng wrapper
+serde1 = ["serde", "serde_derive", "rand_core/serde1"]
+std = []
 
 [dependencies]
 rand_core = { path = "../rand_core", version = "0.2", default-features=false }
 serde = { version = "1", optional = true }
 serde_derive = { version = "^1.0.38", optional = true }
+
+[dev-dependencies]
+# This is for testing serde, unfortunately we can't specify feature-gated dev
+# deps yet, see: https://github.com/rust-lang/cargo/issues/1596
+bincode = "1"

rand_isaac/src/lib.rs

@@ -18,11 +18,12 @@
 #![deny(missing_debug_implementations)]
 #![doc(test(attr(allow(unused_variables), deny(warnings))))]
 
-#![no_std]
+#![cfg_attr(not(feature="std"), no_std)]
 
+#[cfg(feature="std")] extern crate std as core;
 extern crate rand_core;
 
-#[cfg(test)] #[cfg(feature="serde1")] extern crate bincode;
+#[cfg(all(feature="serde1", test))] extern crate bincode;
 #[cfg(feature="serde1")] extern crate serde;
 #[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
 

rand_xorshift/CHANGELOG.md

@@ -0,0 +1,8 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2018-07-16
+- Initial release

rand_xorshift/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "rand_xorshift"
+version = "0.1.0" # NB: When modifying, also modify html_root_url in lib.rs
+authors = ["The Rust Project Developers"]
+license = "MIT/Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/rust-lang-nursery/rand"
+documentation = "https://docs.rs/rand_isaac"
+homepage = "https://crates.io/crates/rand_isaac"
+description = """
+Xorshift random number generator
+"""
+keywords = ["random", "rng", "xorshift"]
+categories = ["algorithms", "no-std"]
+
+[badges]
+travis-ci = { repository = "rust-lang-nursery/rand" }
+appveyor = { repository = "alexcrichton/rand" }
+
+[features]
+serde1 = ["serde", "serde_derive"]
+std = []
+
+[dependencies]
+rand_core = { path = "../rand_core", version = "0.2", default-features=false }
+serde = { version = "1", optional = true }
+serde_derive = { version = "^1.0.38", optional = true }
+
+[dev-dependencies]
+# This is for testing serde, unfortunately we can't specify feature-gated dev
+# deps yet, see: https://github.com/rust-lang/cargo/issues/1596
+bincode = "1"

rand_xorshift/LICENSE-APACHE

@@ -0,0 +1,201 @@
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rand_xorshift/LICENSE-MIT

@@ -0,0 +1,25 @@
+Copyright (c) 2018 The Rust Project Developers
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

rand_xorshift/src/lib.rs

@@ -0,0 +1,32 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// https://rust-lang.org/COPYRIGHT.
+//
+// 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.
+
+//! The xorshift random number generator.
+
+#![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_xorshift/0.1.0")]
+
+#![deny(missing_docs)]
+#![deny(missing_debug_implementations)]
+#![doc(test(attr(allow(unused_variables), deny(warnings))))]
+
+#![cfg_attr(not(feature="std"), no_std)]
+
+#[cfg(feature="std")] extern crate std as core;
+extern crate rand_core;
+
+#[cfg(feature="serde1")] extern crate serde;
+#[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
+#[cfg(all(feature="serde1", test))] extern crate bincode;
+
+mod xorshift;
+
+pub use self::xorshift::XorShiftRng;