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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 prelude::v1::*;
    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.
        #[stable(feature = "rust1", since = "1.0.0")]
        fn from_vec(vec: Vec<u8>) -> Self;

        /// Yields the underlying byte vector of this `OsString`.
        #[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")]
        fn from_bytes(slice: &[u8]) -> &Self;

        /// Gets the underlying byte view of the `OsStr` slice.
        #[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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