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_distr/src/unit_circle.rs | 99 -------------------------------------- 1 file changed, 99 deletions(-) delete mode 100644 rand/rand_distr/src/unit_circle.rs (limited to 'rand/rand_distr/src/unit_circle.rs') diff --git a/rand/rand_distr/src/unit_circle.rs b/rand/rand_distr/src/unit_circle.rs deleted file mode 100644 index 5863a1a..0000000 --- a/rand/rand_distr/src/unit_circle.rs +++ /dev/null @@ -1,99 +0,0 @@ -// Copyright 2018 Developers of the Rand project. -// -// 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. - -use rand::Rng; -use crate::{Distribution, Uniform, uniform::SampleUniform}; -use crate::utils::Float; - -/// Samples uniformly from the edge of the unit circle in two dimensions. -/// -/// Implemented via a method by von Neumann[^1]. -/// -/// -/// # Example -/// -/// ``` -/// use rand_distr::{UnitCircle, Distribution}; -/// -/// let v: [f64; 2] = UnitCircle.sample(&mut rand::thread_rng()); -/// println!("{:?} is from the unit circle.", v) -/// ``` -/// -/// [^1]: von Neumann, J. (1951) [*Various Techniques Used in Connection with -/// Random Digits.*](https://mcnp.lanl.gov/pdf_files/nbs_vonneumann.pdf) -/// NBS Appl. Math. Ser., No. 12. Washington, DC: U.S. Government Printing -/// Office, pp. 36-38. -#[derive(Clone, Copy, Debug)] -pub struct UnitCircle; - -impl Distribution<[N; 2]> for UnitCircle { - #[inline] - fn sample(&self, rng: &mut R) -> [N; 2] { - let uniform = Uniform::new(N::from(-1.), N::from(1.)); - let mut x1; - let mut x2; - let mut sum; - loop { - x1 = uniform.sample(rng); - x2 = uniform.sample(rng); - sum = x1*x1 + x2*x2; - if sum < N::from(1.) { - break; - } - } - let diff = x1*x1 - x2*x2; - [diff / sum, N::from(2.)*x1*x2 / sum] - } -} - -#[cfg(test)] -mod tests { - use crate::Distribution; - use super::UnitCircle; - - /// Assert that two numbers are almost equal to each other. - /// - /// On panic, this macro will print the values of the expressions with their - /// debug representations. - macro_rules! assert_almost_eq { - ($a:expr, $b:expr, $prec:expr) => ( - let diff = ($a - $b).abs(); - if diff > $prec { - panic!(format!( - "assertion failed: `abs(left - right) = {:.1e} < {:e}`, \ - (left: `{}`, right: `{}`)", - diff, $prec, $a, $b)); - } - ); - } - - #[test] - fn norm() { - let mut rng = crate::test::rng(1); - for _ in 0..1000 { - let x: [f64; 2] = UnitCircle.sample(&mut rng); - assert_almost_eq!(x[0]*x[0] + x[1]*x[1], 1., 1e-15); - } - } - - #[test] - fn value_stability() { - let mut rng = crate::test::rng(2); - let expected = [ - [-0.9965658683520504, -0.08280380447614634], - [-0.9790853270389644, -0.20345004884984505], - [-0.8449189758898707, 0.5348943112253227], - ]; - let samples: [[f64; 2]; 3] = [ - UnitCircle.sample(&mut rng), - UnitCircle.sample(&mut rng), - UnitCircle.sample(&mut rng), - ]; - assert_eq!(samples, expected); - } -} -- cgit v1.2.1