Function little::stream::buf_copy

pub fn buf_copy<I, O>(buf: &mut [u8], reader: &mut I, writer: &mut O) -> Result<u64, Error> where I: Read, O: Write

Copy all bytes from reader to writer using buf.

Example

use little::stream;
use std::io::{ Cursor, Read };

let data: &[u8] = b"it is interesting";
let mut reader = Cursor::new(data);
let mut writer = Vec::new();

let mut buf = [0; 4]; // note the buffer is smaller
stream::buf_copy(&mut buf, &mut reader.take(5), &mut writer).unwrap();

assert_eq!("it is", String::from_utf8_lossy(&writer[..]));