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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.
//! Unix-specific extension to the primitives in the `std::ffi` module
#![stable(feature = "rust1", since = "1.0.0")]
use ffi::{OsStr, OsString};
use mem;
use sys::os_str::Buf;
use sys_common::{FromInner, IntoInner, AsInner};
/// Unix-specific extensions to `OsString`.
#[stable(feature = "rust1", since = "1.0.0")]
pub trait OsStringExt {
/// Creates an [`OsString`] from a byte vector.
///
/// # Examples
///
/// ```
/// use std::ffi::OsString;
/// use std::os::unix::ffi::OsStringExt;
///
/// let bytes = b"foo".to_vec();
/// let os_string = OsString::from_vec(bytes);
/// assert_eq!(os_string.to_str(), Some("foo"));
/// ```
///
/// [`OsString`]: ../../../ffi/struct.OsString.html
#[stable(feature = "rust1", since = "1.0.0")]
fn from_vec(vec: Vec<u8>) -> Self;
/// Yields the underlying byte vector of this [`OsString`].
///
/// # Examples
///
/// ```
/// use std::ffi::OsString;
/// use std::os::unix::ffi::OsStringExt;
///
/// let mut os_string = OsString::new();
/// os_string.push("foo");
/// let bytes = os_string.into_vec();
/// assert_eq!(bytes, b"foo");
/// ```
///
/// [`OsString`]: ../../../ffi/struct.OsString.html
#[stable(feature = "rust1", since = "1.0.0")]
fn into_vec(self) -> Vec<u8>;
}
#[stable(feature = "rust1", since = "1.0.0")]
impl OsStringExt for OsString {
fn from_vec(vec: Vec<u8>) -> OsString {
FromInner::from_inner(Buf { inner: vec })
}
fn into_vec(self) -> Vec<u8> {
self.into_inner().inner
}
}
/// Unix-specific extensions to `OsStr`.
#[stable(feature = "rust1", since = "1.0.0")]
pub trait OsStrExt {
#[stable(feature = "rust1", since = "1.0.0")]
/// Creates an [`OsStr`] from a byte slice.
///
/// # Examples
///
/// ```
/// use std::ffi::OsStr;
/// use std::os::unix::ffi::OsStrExt;
///
/// let bytes = b"foo";
/// let os_str = OsStr::from_bytes(bytes);
/// assert_eq!(os_str.to_str(), Some("foo"));
/// ```
///
/// [`OsStr`]: ../../../ffi/struct.OsStr.html
fn from_bytes(slice: &[u8]) -> &Self;
/// Gets the underlying byte view of the [`OsStr`] slice.
///
/// # Examples
///
/// ```
/// use std::ffi::OsStr;
/// use std::os::unix::ffi::OsStrExt;
///
/// let mut os_str = OsStr::new("foo");
/// let bytes = os_str.as_bytes();
/// assert_eq!(bytes, b"foo");
/// ```
///
/// [`OsStr`]: ../../../ffi/struct.OsStr.html
#[stable(feature = "rust1", since = "1.0.0")]
fn as_bytes(&self) -> &[u8];
}
#[stable(feature = "rust1", since = "1.0.0")]
impl OsStrExt for OsStr {
fn from_bytes(slice: &[u8]) -> &OsStr {
unsafe { mem::transmute(slice) }
}
fn as_bytes(&self) -> &[u8] {
&self.as_inner().inner
}
}
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