Data commit

Task/File-input-output/Rust/file-input-output-1.rust

@@ -0,0 +1,10 @@
+use std::fs::File;
+use std::io::{Read, Write};
+
+fn main() {
+    let mut file = File::open("input.txt").unwrap();
+    let mut data = Vec::new();
+    file.read_to_end(&mut data).unwrap();
+    let mut file = File::create("output.txt").unwrap();
+    file.write_all(&data).unwrap();
+}

Task/File-input-output/Rust/file-input-output-2.rust

@@ -0,0 +1,28 @@
+use std::fs::File;
+use std::io::{self, Read,  Write};
+use std::path::Path;
+use std::{env, fmt, process};
+
+fn main() {
+    let files: Vec<_> = env::args_os().skip(1).take(2).collect();
+
+    if files.len() != 2 {
+        exit_err("Both an input file and output file are required", 1);
+    }
+
+    copy(&files[0], &files[1]).unwrap_or_else(|e| exit_err(&e, e.raw_os_error().unwrap_or(-1)));
+}
+
+fn copy<P: AsRef<Path>>(infile: P, outfile: P) -> io::Result<()> {
+    let mut vec = Vec::new();
+
+    Ok(try!(File::open(infile)
+         .and_then(|mut i| i.read_to_end(&mut vec))
+         .and_then(|_| File::create(outfile))
+         .and_then(|mut o| o.write_all(&vec))))
+}
+
+fn exit_err<T: fmt::Display>(msg: T, code: i32) -> ! {
+    writeln!(&mut io::stderr(), "ERROR: {}", msg).expect("Could not write to stdout");
+    process::exit(code);
+}