rainbow-rs/src/lib.rs

extern crate crypto_hash;
extern crate memmap;
extern crate rayon;

use crypto_hash::{hex_digest, Algorithm};
use memmap::MmapOptions;
use rayon::prelude::*;
use std::fs::File;

pub fn rainbow(infile: &File, quiet: bool) {
    let mmap = unsafe { MmapOptions::new().map(&infile).unwrap() };

    mmap.par_split(|c| *c == '\n' as u8)
        .map(|coso| {
            let hash = hex_digest(Algorithm::MD5, coso);
            if !quiet {
                println!("{}", hash);
            }
        })
        .collect::<()>();
}