diff --git a/main.rs b/main.rs
index 5ed41fc..ebce1ae 100644
--- a/main.rs
+++ b/main.rs
@@ -22,6 +22,18 @@ fn print_error(error: Box<error::Error>) {
     writeln!(io::stderr(), "hexcat: {}", error.description()).expect("could not write to stderr");
 }
 
+fn print_file(file: fs::File) {
+    let buf_reader = io::BufReader::new(file);
+    for byte in buf_reader.bytes() {
+        write!(io::stdout(), "\\x").expect("could not write to stdout");
+        let mut byte_hex = format!("{:x}", byte.expect("could not read byte"));
+        if byte_hex.len() == 1 {
+            byte_hex.insert(0, '0');
+        }
+        write!(io::stdout(), "{}", byte_hex).expect("could not write to stdout");
+    }
+}
+
 fn main() {
     let matches = clap::App::new("hexcat")
         .version(crate_version!())
@@ -42,15 +54,7 @@ fn main() {
                 continue;
             }
         };
-        let buf_reader = io::BufReader::new(file);
-        for byte in buf_reader.bytes() {
-            write!(io::stdout(), "\\x").expect("could not write to stdout");
-            let mut byte_hex = format!("{:x}", byte.expect("could not read byte"));
-            if byte_hex.len() == 1 {
-                byte_hex.insert(0, '0');
-            }
-            write!(io::stdout(), "{}", byte_hex).expect("could not write to stdout");
-        }
+        print_file(file);
     }
     // TODO: don't print newline if nothing was written
     write!(io::stdout(), "\n").expect("could not write to stdout");