find_bytes.rs

// find_str uses Searcher which uses &[u8] internally
fn find_bytes(haystack: &[u8], needle: &[u8]) -> Option<uint> {
    unsafe {
        let hs:&str = std::mem::transmute(haystack);
        let ns:&str = std::mem::transmute(needle);
        hs.find_str(ns)
    }
}

fn main() {
    let h = [1u8, 2, 3, 4, 5, 6, 7];
    let n = [5u8, 6];
    let p = find_bytes(h, n);
    println!("Found on {}", p.unwrap());    
}