#[cfg(test)] use std::io::{File,MemReader};
#[cfg(test)] use std::str::from_utf8;

pub trait SliceContains {
 fn contains_slice(&self, needle: &[u8]) -> bool;
 fn contains_slice_pos(&self, needle: &[u8]) -> Option<uint>;
}

impl<'a> SliceContains for &'a [u8] {
 #[inline(never)]
 fn contains_slice(&self, needle: &[u8]) -> bool {
  self.contains_slice_pos(needle).is_some()
 }

 #[inline(never)]
 fn contains_slice_pos(&self, _needle: &[u8]) -> Option<uint> {
  if self.len() < 2 { return None; }
  for i in range(0, self.len()-1) {
   if self[i] == 10 && self[i+1] == 10 { return Some(i); }
  }
  None
 }
}