snarkos-utilities 1.1.4

// Copyright (C) 2019-2020 Aleo Systems Inc.
// This file is part of the snarkOS library.

// The snarkOS library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// The snarkOS library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with the snarkOS library. If not, see <https://www.gnu.org/licenses/>.

use rand::{
    distributions::{Distribution, Standard},
    Rng,
};

pub trait UniformRand: Sized {
    fn rand<R: Rng + ?Sized>(rng: &mut R) -> Self;
}

impl<T> UniformRand for T
where
    Standard: Distribution<T>,
{
    #[inline]
    fn rand<R: Rng + ?Sized>(rng: &mut R) -> Self {
        rng.sample(Standard)
    }
}

/// Should be used only for tests, not for any real world usage.
pub fn test_rng() -> rand::rngs::StdRng {
    use rand::SeedableRng;

    // arbitrary seed
    let seed = [
        1, 0, 0, 0, 23, 0, 0, 0, 200, 1, 0, 0, 210, 30, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    ];
    rand::rngs::StdRng::from_seed(seed)
}