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author | Daniel Mueller <deso@posteo.net> | 2020-04-04 14:39:19 -0700 |
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committer | Daniel Mueller <deso@posteo.net> | 2020-04-04 14:39:19 -0700 |
commit | d0d9683df8398696147e7ee1fcffb2e4e957008c (patch) | |
tree | 4baa76712a76f4d072ee3936c07956580b230820 /rand/rand_xoshiro/src/xoshiro256plus.rs | |
parent | 203e691f46d591a2cc8acdfd850fa9f5b0fb8a98 (diff) | |
download | nitrocli-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/xoshiro256plus.rs')
-rw-r--r-- | rand/rand_xoshiro/src/xoshiro256plus.rs | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/rand/rand_xoshiro/src/xoshiro256plus.rs b/rand/rand_xoshiro/src/xoshiro256plus.rs deleted file mode 100644 index 396f588..0000000 --- a/rand/rand_xoshiro/src/xoshiro256plus.rs +++ /dev/null @@ -1,131 +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::impls::fill_bytes_via_next; -use rand_core::le::read_u64_into; -use rand_core::{SeedableRng, RngCore, Error}; - -/// A xoshiro256+ random number generator. -/// -/// The xoshiro256+ 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 `xoshiro256plus.c` -/// reference source code](http://xoshiro.di.unimi.it/xoshiro256plus.c) by -/// David Blackman and Sebastiano Vigna. -#[derive(Debug, Clone)] -#[cfg_attr(feature="serde1", derive(Serialize, Deserialize))] -pub struct Xoshiro256Plus { - s: [u64; 4], -} - -impl Xoshiro256Plus { - /// Jump forward, equivalently to 2^128 calls to `next_u64()`. - /// - /// This can be used to generate 2^128 non-overlapping subsequences for - /// parallel computations. - /// - /// ``` - /// use rand_xoshiro::rand_core::SeedableRng; - /// use rand_xoshiro::Xoshiro256Plus; - /// - /// let rng1 = Xoshiro256Plus::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, [ - 0x180ec6d33cfd0aba, 0xd5a61266f0c9392c, - 0xa9582618e03fc9aa, 0x39abdc4529b1661c - ]); - } - - /// Jump forward, equivalently to 2^192 calls to `next_u64()`. - /// - /// This can be used to generate 2^64 starting points, from each of which - /// `jump()` will generate 2^64 non-overlapping subsequences for parallel - /// distributed computations. - pub fn long_jump(&mut self) { - impl_jump!(u64, self, [ - 0x76e15d3efefdcbbf, 0xc5004e441c522fb3, - 0x77710069854ee241, 0x39109bb02acbe635 - ]); - } -} - -impl SeedableRng for Xoshiro256Plus { - type Seed = [u8; 32]; - - /// Create a new `Xoshiro256Plus`. If `seed` is entirely 0, it will be - /// mapped to a different seed. - #[inline] - fn from_seed(seed: [u8; 32]) -> Xoshiro256Plus { - deal_with_zero_seed!(seed, Self); - let mut state = [0; 4]; - read_u64_into(&seed, &mut state); - Xoshiro256Plus { s: state } - } - - /// Seed a `Xoshiro256Plus` from a `u64` using `SplitMix64`. - fn seed_from_u64(seed: u64) -> Xoshiro256Plus { - from_splitmix!(seed) - } -} - -impl RngCore for Xoshiro256Plus { - #[inline] - fn next_u32(&mut self) -> u32 { - // The 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 result_plus = self.s[0].wrapping_add(self.s[3]); - impl_xoshiro_u64!(self); - result_plus - } - - #[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<(), Error> { - self.fill_bytes(dest); - Ok(()) - } -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn reference() { - let mut rng = Xoshiro256Plus::from_seed( - [1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, - 3, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0]); - // These values were produced with the reference implementation: - // http://xoshiro.di.unimi.it/xoshiro256plus.c - let expected = [ - 5, 211106232532999, 211106635186183, 9223759065350669058, - 9250833439874351877, 13862484359527728515, 2346507365006083650, - 1168864526675804870, 34095955243042024, 3466914240207415127, - ]; - for &e in &expected { - assert_eq!(rng.next_u64(), e); - } - } -} |