vendor/flate2/examples/deflateencoder-bufread.rs

   1 extern crate flate2;
   2
   3 use flate2::bufread::DeflateEncoder;
   4 use flate2::Compression;
   5 use std::fs::File;
   6 use std::io;
   7 use std::io::prelude::*;
   8 use std::io::BufReader;
   9
  10 // Open file and debug print the contents compressed with Deflate
  11 fn main() {
  12     println!("{:?}", open_hello_world().unwrap());
  13 }
  14
  15 // Opens sample file, compresses the contents and returns a Vector or error
  16 // File wrapped in a BufReader implements Bufread
  17 fn open_hello_world() -> io::Result<Vec<u8>> {
  18     let f = File::open("examples/hello_world.txt")?;
  19     let b = BufReader::new(f);
  20     let mut deflater = DeflateEncoder::new(b, Compression::fast());
  21     let mut buffer = Vec::new();
  22     deflater.read_to_end(&mut buffer)?;
  23     Ok(buffer)
  24 }