rust/src/libstd/sys/redox/os_str.rs

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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// 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.
/// The underlying OsString/OsStr implementation on Unix systems: just
/// a `Vec<u8>`/`[u8]`.
use borrow::Cow;
use fmt;
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use str;
use mem;
use rc::Rc;
use sync::Arc;
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use sys_common::{AsInner, IntoInner};
use sys_common::bytestring::debug_fmt_bytestring;
use std_unicode::lossy::Utf8Lossy;
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#[derive(Clone, Hash)]
pub struct Buf {
pub inner: Vec<u8>
}
pub struct Slice {
pub inner: [u8]
}
impl fmt::Debug for Slice {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
debug_fmt_bytestring(&self.inner, formatter)
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}
}
impl fmt::Display for Slice {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&Utf8Lossy::from_bytes(&self.inner), formatter)
}
}
impl fmt::Debug for Buf {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
fmt::Debug::fmt(self.as_slice(), formatter)
}
}
impl fmt::Display for Buf {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self.as_slice(), formatter)
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}
}
impl IntoInner<Vec<u8>> for Buf {
fn into_inner(self) -> Vec<u8> {
self.inner
}
}
impl AsInner<[u8]> for Buf {
fn as_inner(&self) -> &[u8] {
&self.inner
}
}
impl Buf {
pub fn from_string(s: String) -> Buf {
Buf { inner: s.into_bytes() }
}
#[inline]
pub fn with_capacity(capacity: usize) -> Buf {
Buf {
inner: Vec::with_capacity(capacity)
}
}
#[inline]
pub fn clear(&mut self) {
self.inner.clear()
}
#[inline]
pub fn capacity(&self) -> usize {
self.inner.capacity()
}
#[inline]
pub fn reserve(&mut self, additional: usize) {
self.inner.reserve(additional)
}
#[inline]
pub fn reserve_exact(&mut self, additional: usize) {
self.inner.reserve_exact(additional)
}
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#[inline]
pub fn shrink_to_fit(&mut self) {
self.inner.shrink_to_fit()
}
#[inline]
pub fn shrink_to(&mut self, min_capacity: usize) {
self.inner.shrink_to(min_capacity)
}
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pub fn as_slice(&self) -> &Slice {
unsafe { mem::transmute(&*self.inner) }
}
pub fn into_string(self) -> Result<String, Buf> {
String::from_utf8(self.inner).map_err(|p| Buf { inner: p.into_bytes() } )
}
pub fn push_slice(&mut self, s: &Slice) {
self.inner.extend_from_slice(&s.inner)
}
#[inline]
pub fn into_box(self) -> Box<Slice> {
unsafe { mem::transmute(self.inner.into_boxed_slice()) }
}
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#[inline]
pub fn from_box(boxed: Box<Slice>) -> Buf {
let inner: Box<[u8]> = unsafe { mem::transmute(boxed) };
Buf { inner: inner.into_vec() }
}
#[inline]
pub fn into_arc(&self) -> Arc<Slice> {
self.as_slice().into_arc()
}
#[inline]
pub fn into_rc(&self) -> Rc<Slice> {
self.as_slice().into_rc()
}
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}
impl Slice {
fn from_u8_slice(s: &[u8]) -> &Slice {
unsafe { mem::transmute(s) }
}
pub fn from_str(s: &str) -> &Slice {
Slice::from_u8_slice(s.as_bytes())
}
pub fn to_str(&self) -> Option<&str> {
str::from_utf8(&self.inner).ok()
}
pub fn to_string_lossy(&self) -> Cow<str> {
String::from_utf8_lossy(&self.inner)
}
pub fn to_owned(&self) -> Buf {
Buf { inner: self.inner.to_vec() }
}
#[inline]
pub fn into_box(&self) -> Box<Slice> {
let boxed: Box<[u8]> = self.inner.into();
unsafe { mem::transmute(boxed) }
}
pub fn empty_box() -> Box<Slice> {
let boxed: Box<[u8]> = Default::default();
unsafe { mem::transmute(boxed) }
}
#[inline]
pub fn into_arc(&self) -> Arc<Slice> {
let arc: Arc<[u8]> = Arc::from(&self.inner);
unsafe { Arc::from_raw(Arc::into_raw(arc) as *const Slice) }
}
#[inline]
pub fn into_rc(&self) -> Rc<Slice> {
let rc: Rc<[u8]> = Rc::from(&self.inner);
unsafe { Rc::from_raw(Rc::into_raw(rc) as *const Slice) }
}
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}