aboutsummaryrefslogtreecommitdiff
path: root/rand/rand_xoshiro/src/xoroshiro128plus.rs
diff options
context:
space:
mode:
authorDaniel Mueller <deso@posteo.net>2020-04-04 14:39:19 -0700
committerDaniel Mueller <deso@posteo.net>2020-04-04 14:39:19 -0700
commitd0d9683df8398696147e7ee1fcffb2e4e957008c (patch)
tree4baa76712a76f4d072ee3936c07956580b230820 /rand/rand_xoshiro/src/xoroshiro128plus.rs
parent203e691f46d591a2cc8acdfd850fa9f5b0fb8a98 (diff)
downloadnitrocli-d0d9683df8398696147e7ee1fcffb2e4e957008c.tar.gz
nitrocli-d0d9683df8398696147e7ee1fcffb2e4e957008c.tar.bz2
Remove vendored dependencies
While it appears that by now we actually can get successful builds without Cargo insisting on Internet access by virtue of using the --frozen flag, maintaining vendored dependencies is somewhat of a pain point. This state will also get worse with upcoming changes that replace argparse in favor of structopt and pull in a slew of new dependencies by doing so. Then there is also the repository structure aspect, which is non-standard due to the way we vendor dependencies and a potential source of confusion. In order to fix these problems, this change removes all the vendored dependencies we have. Delete subrepo argparse/:argparse Delete subrepo base32/:base32 Delete subrepo cc/:cc Delete subrepo cfg-if/:cfg-if Delete subrepo getrandom/:getrandom Delete subrepo lazy-static/:lazy-static Delete subrepo libc/:libc Delete subrepo nitrokey-sys/:nitrokey-sys Delete subrepo nitrokey/:nitrokey Delete subrepo rand/:rand
Diffstat (limited to 'rand/rand_xoshiro/src/xoroshiro128plus.rs')
-rw-r--r--rand/rand_xoshiro/src/xoroshiro128plus.rs130
1 files changed, 0 insertions, 130 deletions
diff --git a/rand/rand_xoshiro/src/xoroshiro128plus.rs b/rand/rand_xoshiro/src/xoroshiro128plus.rs
deleted file mode 100644
index a7b4ebc..0000000
--- a/rand/rand_xoshiro/src/xoroshiro128plus.rs
+++ /dev/null
@@ -1,130 +0,0 @@
-// 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.
-
-#[cfg(feature="serde1")] use serde::{Serialize, Deserialize};
-use rand_core;
-use rand_core::le::read_u64_into;
-use rand_core::impls::fill_bytes_via_next;
-use rand_core::{RngCore, SeedableRng};
-
-/// A xoroshiro128+ random number generator.
-///
-/// The xoroshiro128+ algorithm is not suitable for cryptographic purposes, but
-/// is very fast and has good statistical properties, besides a low linear
-/// complexity in the lowest bits.
-///
-/// The algorithm used here is translated from [the `xoroshiro128plus.c`
-/// reference source code](http://xoshiro.di.unimi.it/xoroshiro128plus.c) by
-/// David Blackman and Sebastiano Vigna.
-#[allow(missing_copy_implementations)]
-#[derive(Debug, Clone)]
-#[cfg_attr(feature="serde1", derive(Serialize, Deserialize))]
-pub struct Xoroshiro128Plus {
- s0: u64,
- s1: u64,
-}
-
-impl Xoroshiro128Plus {
- /// Jump forward, equivalently to 2^64 calls to `next_u64()`.
- ///
- /// This can be used to generate 2^64 non-overlapping subsequences for
- /// parallel computations.
- ///
- /// ```
- /// use rand_xoshiro::rand_core::SeedableRng;
- /// use rand_xoshiro::Xoroshiro128Plus;
- ///
- /// let rng1 = Xoroshiro128Plus::seed_from_u64(0);
- /// let mut rng2 = rng1.clone();
- /// rng2.jump();
- /// let mut rng3 = rng2.clone();
- /// rng3.jump();
- /// ```
- pub fn jump(&mut self) {
- impl_jump!(u64, self, [0xdf900294d8f554a5, 0x170865df4b3201fc]);
- }
-
- /// Jump forward, equivalently to 2^96 calls to `next_u64()`.
- ///
- /// This can be used to generate 2^32 starting points, from each of which
- /// `jump()` will generate 2^32 non-overlapping subsequences for parallel
- /// distributed computations.
- pub fn long_jump(&mut self) {
- impl_jump!(u64, self, [0xd2a98b26625eee7b, 0xdddf9b1090aa7ac1]);
- }
-}
-
-impl RngCore for Xoroshiro128Plus {
- #[inline]
- fn next_u32(&mut self) -> u32 {
- // The two lowest bits have some linear dependencies, so we use the
- // upper bits instead.
- (self.next_u64() >> 32) as u32
- }
-
- #[inline]
- fn next_u64(&mut self) -> u64 {
- let r = self.s0.wrapping_add(self.s1);
- impl_xoroshiro_u64!(self);
- r
- }
-
- #[inline]
- fn fill_bytes(&mut self, dest: &mut [u8]) {
- fill_bytes_via_next(self, dest);
- }
-
- #[inline]
- fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand_core::Error> {
- self.fill_bytes(dest);
- Ok(())
- }
-}
-
-impl SeedableRng for Xoroshiro128Plus {
- type Seed = [u8; 16];
-
- /// Create a new `Xoroshiro128Plus`. If `seed` is entirely 0, it will be
- /// mapped to a different seed.
- fn from_seed(seed: [u8; 16]) -> Xoroshiro128Plus {
- deal_with_zero_seed!(seed, Self);
- let mut s = [0; 2];
- read_u64_into(&seed, &mut s);
-
- Xoroshiro128Plus {
- s0: s[0],
- s1: s[1],
- }
- }
-
- /// Seed a `Xoroshiro128Plus` from a `u64` using `SplitMix64`.
- fn seed_from_u64(seed: u64) -> Xoroshiro128Plus {
- from_splitmix!(seed)
- }
-}
-
-#[cfg(test)]
-mod tests {
- use super::*;
-
- #[test]
- fn reference() {
- let mut rng = Xoroshiro128Plus::from_seed(
- [1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0]);
- // These values were produced with the reference implementation:
- // http://xoshiro.di.unimi.it/xoshiro128starstar.c
- let expected = [
- 3, 412333834243, 2360170716294286339, 9295852285959843169,
- 2797080929874688578, 6019711933173041966, 3076529664176959358,
- 3521761819100106140, 7493067640054542992, 920801338098114767,
- ];
- for &e in &expected {
- assert_eq!(rng.next_u64(), e);
- }
- }
-}