1 // Copyright 2018 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 /// The underlying OsString/OsStr implementation on Unix systems: just
12 /// a `Vec<u8>`/`[u8]`.
20 use sys_common::{AsInner, IntoInner};
21 use sys_common::bytestring::debug_fmt_bytestring;
22 use core::str::lossy::Utf8Lossy;
24 #[derive(Clone, Hash)]
33 impl fmt::Debug for Slice {
34 fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
35 debug_fmt_bytestring(&self.inner, formatter)
39 impl fmt::Display for Slice {
40 fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
41 fmt::Display::fmt(&Utf8Lossy::from_bytes(&self.inner), formatter)
45 impl fmt::Debug for Buf {
46 fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
47 fmt::Debug::fmt(self.as_slice(), formatter)
51 impl fmt::Display for Buf {
52 fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
53 fmt::Display::fmt(self.as_slice(), formatter)
57 impl IntoInner<Vec<u8>> for Buf {
58 fn into_inner(self) -> Vec<u8> {
63 impl AsInner<[u8]> for Buf {
64 fn as_inner(&self) -> &[u8] {
71 pub fn from_string(s: String) -> Buf {
72 Buf { inner: s.into_bytes() }
76 pub fn with_capacity(capacity: usize) -> Buf {
78 inner: Vec::with_capacity(capacity)
83 pub fn clear(&mut self) {
88 pub fn capacity(&self) -> usize {
93 pub fn reserve(&mut self, additional: usize) {
94 self.inner.reserve(additional)
98 pub fn reserve_exact(&mut self, additional: usize) {
99 self.inner.reserve_exact(additional)
103 pub fn shrink_to_fit(&mut self) {
104 self.inner.shrink_to_fit()
108 pub fn shrink_to(&mut self, min_capacity: usize) {
109 self.inner.shrink_to(min_capacity)
112 pub fn as_slice(&self) -> &Slice {
113 unsafe { mem::transmute(&*self.inner) }
116 pub fn into_string(self) -> Result<String, Buf> {
117 String::from_utf8(self.inner).map_err(|p| Buf { inner: p.into_bytes() } )
120 pub fn push_slice(&mut self, s: &Slice) {
121 self.inner.extend_from_slice(&s.inner)
125 pub fn into_box(self) -> Box<Slice> {
126 unsafe { mem::transmute(self.inner.into_boxed_slice()) }
130 pub fn from_box(boxed: Box<Slice>) -> Buf {
131 let inner: Box<[u8]> = unsafe { mem::transmute(boxed) };
132 Buf { inner: inner.into_vec() }
136 pub fn into_arc(&self) -> Arc<Slice> {
137 self.as_slice().into_arc()
141 pub fn into_rc(&self) -> Rc<Slice> {
142 self.as_slice().into_rc()
147 fn from_u8_slice(s: &[u8]) -> &Slice {
148 unsafe { mem::transmute(s) }
151 pub fn from_str(s: &str) -> &Slice {
152 Slice::from_u8_slice(s.as_bytes())
155 pub fn to_str(&self) -> Option<&str> {
156 str::from_utf8(&self.inner).ok()
159 pub fn to_string_lossy(&self) -> Cow<str> {
160 String::from_utf8_lossy(&self.inner)
163 pub fn to_owned(&self) -> Buf {
164 Buf { inner: self.inner.to_vec() }
168 pub fn into_box(&self) -> Box<Slice> {
169 let boxed: Box<[u8]> = self.inner.into();
170 unsafe { mem::transmute(boxed) }
173 pub fn empty_box() -> Box<Slice> {
174 let boxed: Box<[u8]> = Default::default();
175 unsafe { mem::transmute(boxed) }
179 pub fn into_arc(&self) -> Arc<Slice> {
180 let arc: Arc<[u8]> = Arc::from(&self.inner);
181 unsafe { Arc::from_raw(Arc::into_raw(arc) as *const Slice) }
185 pub fn into_rc(&self) -> Rc<Slice> {
186 let rc: Rc<[u8]> = Rc::from(&self.inner);
187 unsafe { Rc::from_raw(Rc::into_raw(rc) as *const Slice) }