1 //! The underlying OsString/OsStr implementation on Unix and many other
2 //! systems: just a `Vec<u8>`/`[u8]`.
4 use crate::borrow::Cow;
11 use crate::sys_common::{AsInner, IntoInner};
13 use core::str::lossy::{Utf8Lossy, Utf8LossyChunk};
29 impl fmt::Debug for Slice {
30 fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
31 // Writes out a valid unicode string with the correct escape sequences
33 formatter.write_str("\"")?;
34 for Utf8LossyChunk { valid, broken } in Utf8Lossy::from_bytes(&self.inner).chunks() {
35 for c in valid.chars().flat_map(|c| c.escape_debug()) {
36 formatter.write_char(c)?
40 write!(formatter, "\\x{:02X}", b)?;
43 formatter.write_str("\"")
47 impl fmt::Display for Slice {
48 fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
49 fmt::Display::fmt(&Utf8Lossy::from_bytes(&self.inner), formatter)
53 impl fmt::Debug for Buf {
54 fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
55 fmt::Debug::fmt(self.as_slice(), formatter)
59 impl fmt::Display for Buf {
60 fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
61 fmt::Display::fmt(self.as_slice(), formatter)
67 fn clone(&self) -> Self {
68 Buf { inner: self.inner.clone() }
72 fn clone_from(&mut self, source: &Self) {
73 self.inner.clone_from(&source.inner)
77 impl IntoInner<Vec<u8>> for Buf {
78 fn into_inner(self) -> Vec<u8> {
83 impl AsInner<[u8]> for Buf {
84 fn as_inner(&self) -> &[u8] {
90 pub fn from_string(s: String) -> Buf {
91 Buf { inner: s.into_bytes() }
95 pub fn with_capacity(capacity: usize) -> Buf {
96 Buf { inner: Vec::with_capacity(capacity) }
100 pub fn clear(&mut self) {
105 pub fn capacity(&self) -> usize {
106 self.inner.capacity()
110 pub fn reserve(&mut self, additional: usize) {
111 self.inner.reserve(additional)
115 pub fn reserve_exact(&mut self, additional: usize) {
116 self.inner.reserve_exact(additional)
120 pub fn shrink_to_fit(&mut self) {
121 self.inner.shrink_to_fit()
125 pub fn shrink_to(&mut self, min_capacity: usize) {
126 self.inner.shrink_to(min_capacity)
130 pub fn as_slice(&self) -> &Slice {
131 // SAFETY: Slice just wraps [u8],
132 // and &*self.inner is &[u8], therefore
133 // transmuting &[u8] to &Slice is safe.
134 unsafe { mem::transmute(&*self.inner) }
138 pub fn as_mut_slice(&mut self) -> &mut Slice {
139 // SAFETY: Slice just wraps [u8],
140 // and &mut *self.inner is &mut [u8], therefore
141 // transmuting &mut [u8] to &mut Slice is safe.
142 unsafe { mem::transmute(&mut *self.inner) }
145 pub fn into_string(self) -> Result<String, Buf> {
146 String::from_utf8(self.inner).map_err(|p| Buf { inner: p.into_bytes() })
149 pub fn push_slice(&mut self, s: &Slice) {
150 self.inner.extend_from_slice(&s.inner)
154 pub fn into_box(self) -> Box<Slice> {
155 unsafe { mem::transmute(self.inner.into_boxed_slice()) }
159 pub fn from_box(boxed: Box<Slice>) -> Buf {
160 let inner: Box<[u8]> = unsafe { mem::transmute(boxed) };
161 Buf { inner: inner.into_vec() }
165 pub fn into_arc(&self) -> Arc<Slice> {
166 self.as_slice().into_arc()
170 pub fn into_rc(&self) -> Rc<Slice> {
171 self.as_slice().into_rc()
177 fn from_u8_slice(s: &[u8]) -> &Slice {
178 unsafe { mem::transmute(s) }
182 pub fn from_str(s: &str) -> &Slice {
183 Slice::from_u8_slice(s.as_bytes())
186 pub fn to_str(&self) -> Option<&str> {
187 str::from_utf8(&self.inner).ok()
190 pub fn to_string_lossy(&self) -> Cow<'_, str> {
191 String::from_utf8_lossy(&self.inner)
194 pub fn to_owned(&self) -> Buf {
195 Buf { inner: self.inner.to_vec() }
198 pub fn clone_into(&self, buf: &mut Buf) {
199 self.inner.clone_into(&mut buf.inner)
203 pub fn into_box(&self) -> Box<Slice> {
204 let boxed: Box<[u8]> = self.inner.into();
205 unsafe { mem::transmute(boxed) }
208 pub fn empty_box() -> Box<Slice> {
209 let boxed: Box<[u8]> = Default::default();
210 unsafe { mem::transmute(boxed) }
214 pub fn into_arc(&self) -> Arc<Slice> {
215 let arc: Arc<[u8]> = Arc::from(&self.inner);
216 unsafe { Arc::from_raw(Arc::into_raw(arc) as *const Slice) }
220 pub fn into_rc(&self) -> Rc<Slice> {
221 let rc: Rc<[u8]> = Rc::from(&self.inner);
222 unsafe { Rc::from_raw(Rc::into_raw(rc) as *const Slice) }
226 pub fn make_ascii_lowercase(&mut self) {
227 self.inner.make_ascii_lowercase()
231 pub fn make_ascii_uppercase(&mut self) {
232 self.inner.make_ascii_uppercase()
236 pub fn to_ascii_lowercase(&self) -> Buf {
237 Buf { inner: self.inner.to_ascii_lowercase() }
241 pub fn to_ascii_uppercase(&self) -> Buf {
242 Buf { inner: self.inner.to_ascii_uppercase() }
246 pub fn is_ascii(&self) -> bool {
247 self.inner.is_ascii()
251 pub fn eq_ignore_ascii_case(&self, other: &Self) -> bool {
252 self.inner.eq_ignore_ascii_case(&other.inner)