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// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/*
use std::borrow::Cow;
use std::env;
pub fn escape(s: Cow<str>) -> Cow<str> {
if cfg!(unix) {
unix::escape(s)
} else if env::var("MSYSTEM").is_ok() {
unix::escape(s)
} else {
windows::escape(s)
}
}
pub mod windows {
use std::borrow::Cow;
use std::iter::repeat;
/// Escape for the windows cmd.exe shell, for more info see this url:
///
/// http://blogs.msdn.com/b/twistylittlepassagesallalike/archive/2011/04/23
/// /everyone-quotes-arguments-the-wrong-way.aspx
pub fn escape(s: Cow<str>) -> Cow<str> {
let mut needs_escape = false;
for ch in s.chars() {
match ch {
'"' | '\t' | '\n' | ' ' => needs_escape = true,
_ => {}
}
}
if !needs_escape {
return s
}
let mut es = String::with_capacity(s.len());
es.push('"');
let mut chars = s.chars().peekable();
loop {
let mut nslashes = 0;
while let Some(&'\\') = chars.peek() {
chars.next();
nslashes += 1;
}
match chars.next() {
Some('"') => {
es.extend(repeat('\\').take(nslashes * 2 + 1));
es.push('"');
}
Some(c) => {
es.extend(repeat('\\').take(nslashes));
es.push(c);
}
None => {
es.extend(repeat('\\').take(nslashes * 2));
break;
}
}
}
es.push('"');
es.into()
}
#[test]
fn test_escape() {
assert_eq!(escape("--aaa=bbb-ccc".into()), "--aaa=bbb-ccc");
assert_eq!(escape("linker=gcc -L/foo -Wl,bar".into()),
r#""linker=gcc -L/foo -Wl,bar""#);
assert_eq!(escape(r#"--features="default""#.into()),
r#""--features=\"default\"""#);
assert_eq!(escape(r#"\path\to\my documents\"#.into()),
r#""\path\to\my documents\\""#);
}
}
*/