115 lines
3.3 KiB
Rust
115 lines
3.3 KiB
Rust
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Unix-specific extension to the primitives in the `std::ffi` module
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#![stable(feature = "rust1", since = "1.0.0")]
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use ffi::{OsStr, OsString};
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use mem;
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use sys::os_str::Buf;
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use sys_common::{FromInner, IntoInner, AsInner};
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/// Unix-specific extensions to `OsString`.
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#[stable(feature = "rust1", since = "1.0.0")]
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pub trait OsStringExt {
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/// Creates an [`OsString`] from a byte vector.
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///
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/// # Examples
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///
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/// ```
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/// use std::ffi::OsString;
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/// use std::os::unix::ffi::OsStringExt;
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///
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/// let bytes = b"foo".to_vec();
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/// let os_string = OsString::from_vec(bytes);
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/// assert_eq!(os_string.to_str(), Some("foo"));
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/// ```
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///
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/// [`OsString`]: ../../../ffi/struct.OsString.html
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#[stable(feature = "rust1", since = "1.0.0")]
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fn from_vec(vec: Vec<u8>) -> Self;
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/// Yields the underlying byte vector of this [`OsString`].
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///
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/// # Examples
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///
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/// ```
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/// use std::ffi::OsString;
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/// use std::os::unix::ffi::OsStringExt;
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///
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/// let mut os_string = OsString::new();
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/// os_string.push("foo");
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/// let bytes = os_string.into_vec();
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/// assert_eq!(bytes, b"foo");
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/// ```
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///
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/// [`OsString`]: ../../../ffi/struct.OsString.html
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#[stable(feature = "rust1", since = "1.0.0")]
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fn into_vec(self) -> Vec<u8>;
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}
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#[stable(feature = "rust1", since = "1.0.0")]
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impl OsStringExt for OsString {
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fn from_vec(vec: Vec<u8>) -> OsString {
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FromInner::from_inner(Buf { inner: vec })
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}
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fn into_vec(self) -> Vec<u8> {
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self.into_inner().inner
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}
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}
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/// Unix-specific extensions to `OsStr`.
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#[stable(feature = "rust1", since = "1.0.0")]
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pub trait OsStrExt {
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#[stable(feature = "rust1", since = "1.0.0")]
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/// Creates an [`OsStr`] from a byte slice.
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///
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/// # Examples
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///
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/// ```
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/// use std::ffi::OsStr;
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/// use std::os::unix::ffi::OsStrExt;
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///
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/// let bytes = b"foo";
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/// let os_str = OsStr::from_bytes(bytes);
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/// assert_eq!(os_str.to_str(), Some("foo"));
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/// ```
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///
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/// [`OsStr`]: ../../../ffi/struct.OsStr.html
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fn from_bytes(slice: &[u8]) -> &Self;
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/// Gets the underlying byte view of the [`OsStr`] slice.
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///
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/// # Examples
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///
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/// ```
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/// use std::ffi::OsStr;
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/// use std::os::unix::ffi::OsStrExt;
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///
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/// let mut os_str = OsStr::new("foo");
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/// let bytes = os_str.as_bytes();
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/// assert_eq!(bytes, b"foo");
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/// ```
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///
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/// [`OsStr`]: ../../../ffi/struct.OsStr.html
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#[stable(feature = "rust1", since = "1.0.0")]
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fn as_bytes(&self) -> &[u8];
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}
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#[stable(feature = "rust1", since = "1.0.0")]
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impl OsStrExt for OsStr {
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fn from_bytes(slice: &[u8]) -> &OsStr {
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unsafe { mem::transmute(slice) }
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}
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fn as_bytes(&self) -> &[u8] {
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&self.as_inner().inner
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}
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}
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