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extern crate flate2;
extern crate bzip2;
extern crate xz2;
extern crate brotli2;
use std::fs::File;
use std::io::{BufRead, BufReader};
use flate2::read::*;
use bzip2::read::*;
use xz2::read::*;
use brotli2::read::*;
pub fn readfile(fname: &str) -> Box<BufRead> {
let file = File::open(fname).expect(&format!("Could not open {}", fname));
let canonical = fname.to_lowercase();
if canonical.ends_with(".gz") || canonical.ends_with(".gzip") {
return Box::new(BufReader::new(GzDecoder::new(file)));
}
if canonical.ends_with(".bz2") || canonical.ends_with(".bzip") {
return Box::new(BufReader::new(BzDecoder::new(file)));
}
if canonical.ends_with(".xz") || canonical.ends_with(".lzma") {
return Box::new(BufReader::new(XzDecoder::new(file)));
}
if canonical.ends_with(".zlib") || canonical.ends_with(".z") {
return Box::new(BufReader::new(ZlibDecoder::new(file)));
}
if canonical.ends_with(".dfl") {
return Box::new(BufReader::new(DeflateDecoder::new(file)));
}
if canonical.ends_with(".brotli") || canonical.ends_with(".br") {
return Box::new(BufReader::new(BrotliDecoder::new(file)));
}
return Box::new(BufReader::new(file));
}