fountaincode 0.0.8

Implementation of the Luby Transform Code in Rust
Documentation 
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extern crate rand;
use rand::*;

pub struct IdealSoliton {
    limit: f32,
    rng: StdRng,
}

impl IdealSoliton {
    pub fn new(k: usize, seed: usize) -> IdealSoliton {
        let seedarr: &[_] = &[seed];
        let rng: StdRng = SeedableRng::from_seed(seedarr);
        IdealSoliton {
            limit: 1.0 / (k as f32),
            rng: rng,
        }
    }
}

impl Iterator for IdealSoliton {
    type Item = usize;

    fn next(&mut self) -> Option<usize> {
        let y = self.rng.gen::<f32>();
        if y >= self.limit {
            let res = (1.0 / y).ceil() as usize;
            Some(res)
        } else {
            Some(1)
        }
    }
}