From d0d9683df8398696147e7ee1fcffb2e4e957008c Mon Sep 17 00:00:00 2001 From: Daniel Mueller Date: Sat, 4 Apr 2020 14:39:19 -0700 Subject: 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 --- rand/rand_pcg/src/pcg128.rs | 225 -------------------------------------------- 1 file changed, 225 deletions(-) delete mode 100644 rand/rand_pcg/src/pcg128.rs (limited to 'rand/rand_pcg/src/pcg128.rs') diff --git a/rand/rand_pcg/src/pcg128.rs b/rand/rand_pcg/src/pcg128.rs deleted file mode 100644 index 311a41b..0000000 --- a/rand/rand_pcg/src/pcg128.rs +++ /dev/null @@ -1,225 +0,0 @@ -// Copyright 2018 Developers of the Rand project. -// Copyright 2017 Paul Dicker. -// Copyright 2014-2017 Melissa O'Neill and PCG Project contributors -// -// Licensed under the Apache License, Version 2.0 or the MIT license -// , at your -// option. This file may not be copied, modified, or distributed -// except according to those terms. - -//! PCG random number generators - -// This is the default multiplier used by PCG for 64-bit state. -const MULTIPLIER: u128 = 0x2360_ED05_1FC6_5DA4_4385_DF64_9FCC_F645; - -use core::fmt; -use rand_core::{RngCore, SeedableRng, Error, le}; -#[cfg(feature="serde1")] use serde::{Serialize, Deserialize}; - -/// A PCG random number generator (XSL RR 128/64 (LCG) variant). -/// -/// Permuted Congruential Generator with 128-bit state, internal Linear -/// Congruential Generator, and 64-bit output via "xorshift low (bits), -/// random rotation" output function. -/// -/// This is a 128-bit LCG with explicitly chosen stream with the PCG-XSL-RR -/// output function. This combination is the standard `pcg64`. -/// -/// Despite the name, this implementation uses 32 bytes (256 bit) space -/// comprising 128 bits of state and 128 bits stream selector. These are both -/// set by `SeedableRng`, using a 256-bit seed. -#[derive(Clone)] -#[cfg_attr(feature="serde1", derive(Serialize,Deserialize))] -pub struct Lcg128Xsl64 { - state: u128, - increment: u128, -} - -/// `Lcg128Xsl64` is also officially known as `pcg64`. -pub type Pcg64 = Lcg128Xsl64; - -impl Lcg128Xsl64 { - /// Construct an instance compatible with PCG seed and stream. - /// - /// Note that PCG specifies default values for both parameters: - /// - /// - `state = 0xcafef00dd15ea5e5` - /// - `stream = 0xa02bdbf7bb3c0a7ac28fa16a64abf96` - pub fn new(state: u128, stream: u128) -> Self { - // The increment must be odd, hence we discard one bit: - let increment = (stream << 1) | 1; - Lcg128Xsl64::from_state_incr(state, increment) - } - - #[inline] - fn from_state_incr(state: u128, increment: u128) -> Self { - let mut pcg = Lcg128Xsl64 { state, increment }; - // Move away from inital value: - pcg.state = pcg.state.wrapping_add(pcg.increment); - pcg.step(); - pcg - } - - #[inline] - fn step(&mut self) { - // prepare the LCG for the next round - self.state = self.state - .wrapping_mul(MULTIPLIER) - .wrapping_add(self.increment); - } -} - -// Custom Debug implementation that does not expose the internal state -impl fmt::Debug for Lcg128Xsl64 { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "Lcg128Xsl64 {{}}") - } -} - -/// We use a single 255-bit seed to initialise the state and select a stream. -/// One `seed` bit (lowest bit of `seed[8]`) is ignored. -impl SeedableRng for Lcg128Xsl64 { - type Seed = [u8; 32]; - - fn from_seed(seed: Self::Seed) -> Self { - let mut seed_u64 = [0u64; 4]; - le::read_u64_into(&seed, &mut seed_u64); - let state = u128::from(seed_u64[0]) | (u128::from(seed_u64[1]) << 64); - let incr = u128::from(seed_u64[2]) | (u128::from(seed_u64[3]) << 64); - - // The increment must be odd, hence we discard one bit: - Lcg128Xsl64::from_state_incr(state, incr | 1) - } -} - -impl RngCore for Lcg128Xsl64 { - #[inline] - fn next_u32(&mut self) -> u32 { - self.next_u64() as u32 - } - - #[inline] - fn next_u64(&mut self) -> u64 { - self.step(); - output_xsl_rr(self.state) - } - - #[inline] - fn fill_bytes(&mut self, dest: &mut [u8]) { - fill_bytes_impl(self, dest) - } - - #[inline] - fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> { - self.fill_bytes(dest); - Ok(()) - } -} - - -/// A PCG random number generator (XSL 128/64 (MCG) variant). -/// -/// Permuted Congruential Generator with 128-bit state, internal Multiplicative -/// Congruential Generator, and 64-bit output via "xorshift low (bits), -/// random rotation" output function. -/// -/// This is a 128-bit MCG with the PCG-XSL-RR output function, also known as -/// `pcg64_fast`. -/// Note that compared to the standard `pcg64` (128-bit LCG with PCG-XSL-RR -/// output function), this RNG is faster, also has a long cycle, and still has -/// good performance on statistical tests. -#[derive(Clone)] -#[cfg_attr(feature="serde1", derive(Serialize,Deserialize))] -pub struct Mcg128Xsl64 { - state: u128, -} - -/// A friendly name for `Mcg128Xsl64` (also known as `pcg64_fast`). -pub type Pcg64Mcg = Mcg128Xsl64; - -impl Mcg128Xsl64 { - /// Construct an instance compatible with PCG seed. - /// - /// Note that PCG specifies a default value for the parameter: - /// - /// - `state = 0xcafef00dd15ea5e5` - pub fn new(state: u128) -> Self { - // Force low bit to 1, as in C version (C++ uses `state | 3` instead). - Mcg128Xsl64 { state: state | 1 } - } -} - -// Custom Debug implementation that does not expose the internal state -impl fmt::Debug for Mcg128Xsl64 { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "Mcg128Xsl64 {{}}") - } -} - -/// We use a single 126-bit seed to initialise the state and select a stream. -/// Two `seed` bits (lowest order of last byte) are ignored. -impl SeedableRng for Mcg128Xsl64 { - type Seed = [u8; 16]; - - fn from_seed(seed: Self::Seed) -> Self { - // Read as if a little-endian u128 value: - let mut seed_u64 = [0u64; 2]; - le::read_u64_into(&seed, &mut seed_u64); - let state = u128::from(seed_u64[0]) | - u128::from(seed_u64[1]) << 64; - Mcg128Xsl64::new(state) - } -} - -impl RngCore for Mcg128Xsl64 { - #[inline] - fn next_u32(&mut self) -> u32 { - self.next_u64() as u32 - } - - #[inline] - fn next_u64(&mut self) -> u64 { - self.state = self.state.wrapping_mul(MULTIPLIER); - output_xsl_rr(self.state) - } - - #[inline] - fn fill_bytes(&mut self, dest: &mut [u8]) { - fill_bytes_impl(self, dest) - } - - #[inline] - fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> { - self.fill_bytes(dest); - Ok(()) - } -} - -#[inline(always)] -fn output_xsl_rr(state: u128) -> u64 { - // Output function XSL RR ("xorshift low (bits), random rotation") - // Constants are for 128-bit state, 64-bit output - const XSHIFT: u32 = 64; // (128 - 64 + 64) / 2 - const ROTATE: u32 = 122; // 128 - 6 - - let rot = (state >> ROTATE) as u32; - let xsl = ((state >> XSHIFT) as u64) ^ (state as u64); - xsl.rotate_right(rot) -} - -#[inline(always)] -fn fill_bytes_impl(rng: &mut R, dest: &mut [u8]) { - let mut left = dest; - while left.len() >= 8 { - let (l, r) = {left}.split_at_mut(8); - left = r; - let chunk: [u8; 8] = rng.next_u64().to_le_bytes(); - l.copy_from_slice(&chunk); - } - let n = left.len(); - if n > 0 { - let chunk: [u8; 8] = rng.next_u64().to_le_bytes(); - left.copy_from_slice(&chunk[..n]); - } -} -- cgit v1.2.1