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rust-crypto 0.2.32

A (mostly) pure-Rust implementation of various common cryptographic algorithms.
Documentation 
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use std::num::Int;
use std::num::wrapping::{Wrapping, WrappingOps};

// pub type wu32 = Wrapping<u32>;
// pub type wu64 = Wrapping<u64>;

pub fn wrapping_add<W: WrappingOps>(a: W, b: W) -> W {
    (Wrapping(a) + Wrapping(b)).0
}

pub trait WrappingExt {
    fn rotate_left(self, n: u32) -> Self;
}

impl <I: Int> WrappingExt for Wrapping<I> {
    fn rotate_left(self, n: u32) -> Wrapping<I> {
        Wrapping(self.0.rotate_left(n))
    }
}