vendor/flate2/examples/zlibencoder-read.rs

   1 extern crate flate2;
   2
   3 use flate2::read::ZlibEncoder;
   4 use flate2::Compression;
   5 use std::fs::File;
   6 use std::io::prelude::*;
   7
   8 // Open file and debug print the compressed contents
   9 fn main() {
  10     println!("{:?}", open_hello_world().unwrap());
  11 }
  12
  13 // Opens sample file, compresses the contents and returns a Vector or error
  14 // File implements Read
  15 fn open_hello_world() -> std::io::Result<Vec<u8>> {
  16     let f = File::open("examples/hello_world.txt")?;
  17     let mut z = ZlibEncoder::new(f, Compression::fast());
  18     let mut buffer = [0; 50];
  19     let byte_count = z.read(&mut buffer)?;
  20     Ok(buffer[0..byte_count].to_vec())
  21 }