1345 lines
39 KiB
Rust
1345 lines
39 KiB
Rust
use crate::borrow::{Borrow, Cow};
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use crate::cmp;
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use crate::fmt;
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use crate::hash::{Hash, Hasher};
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use crate::ops;
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use crate::rc::Rc;
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use crate::sync::Arc;
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use crate::sys::os_str::{Buf, Slice};
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use crate::sys_common::{AsInner, FromInner, IntoInner};
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/// A type that can represent owned, mutable platform-native strings, but is
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/// cheaply inter-convertible with Rust strings.
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///
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/// The need for this type arises from the fact that:
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///
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/// * On Unix systems, strings are often arbitrary sequences of non-zero
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/// bytes, in many cases interpreted as UTF-8.
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///
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/// * On Windows, strings are often arbitrary sequences of non-zero 16-bit
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/// values, interpreted as UTF-16 when it is valid to do so.
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///
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/// * In Rust, strings are always valid UTF-8, which may contain zeros.
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///
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/// `OsString` and [`OsStr`] bridge this gap by simultaneously representing Rust
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/// and platform-native string values, and in particular allowing a Rust string
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/// to be converted into an "OS" string with no cost if possible. A consequence
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/// of this is that `OsString` instances are *not* `NUL` terminated; in order
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/// to pass to e.g., Unix system call, you should create a [`CStr`].
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///
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/// `OsString` is to [`&OsStr`] as [`String`] is to [`&str`]: the former
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/// in each pair are owned strings; the latter are borrowed
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/// references.
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///
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/// Note, `OsString` and [`OsStr`] internally do not necessarily hold strings in
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/// the form native to the platform; While on Unix, strings are stored as a
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/// sequence of 8-bit values, on Windows, where strings are 16-bit value based
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/// as just discussed, strings are also actually stored as a sequence of 8-bit
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/// values, encoded in a less-strict variant of UTF-8. This is useful to
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/// understand when handling capacity and length values.
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///
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/// # Creating an `OsString`
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///
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/// **From a Rust string**: `OsString` implements
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/// [`From`]`<`[`String`]`>`, so you can use `my_string.from` to
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/// create an `OsString` from a normal Rust string.
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///
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/// **From slices:** Just like you can start with an empty Rust
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/// [`String`] and then [`push_str`][String.push_str] `&str`
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/// sub-string slices into it, you can create an empty `OsString` with
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/// the [`new`] method and then push string slices into it with the
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/// [`push`] method.
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///
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/// # Extracting a borrowed reference to the whole OS string
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///
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/// You can use the [`as_os_str`] method to get an `&`[`OsStr`] from
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/// an `OsString`; this is effectively a borrowed reference to the
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/// whole string.
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///
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/// # Conversions
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///
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/// See the [module's toplevel documentation about conversions][conversions] for a discussion on
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/// the traits which `OsString` implements for [conversions] from/to native representations.
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///
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/// [`OsStr`]: struct.OsStr.html
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/// [`&OsStr`]: struct.OsStr.html
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/// [`CStr`]: struct.CStr.html
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/// [`From`]: ../convert/trait.From.html
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/// [`String`]: ../string/struct.String.html
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/// [`&str`]: ../primitive.str.html
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/// [`u8`]: ../primitive.u8.html
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/// [`u16`]: ../primitive.u16.html
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/// [String.push_str]: ../string/struct.String.html#method.push_str
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/// [`new`]: #method.new
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/// [`push`]: #method.push
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/// [`as_os_str`]: #method.as_os_str
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/// [conversions]: index.html#conversions
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#[derive(Clone)]
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#[stable(feature = "rust1", since = "1.0.0")]
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pub struct OsString {
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inner: Buf,
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}
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/// Borrowed reference to an OS string (see [`OsString`]).
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///
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/// This type represents a borrowed reference to a string in the operating system's preferred
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/// representation.
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///
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/// `&OsStr` is to [`OsString`] as [`&str`] is to [`String`]: the former in each pair are borrowed
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/// references; the latter are owned strings.
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///
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/// See the [module's toplevel documentation about conversions][conversions] for a discussion on
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/// the traits which `OsStr` implements for [conversions] from/to native representations.
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///
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/// [`OsString`]: struct.OsString.html
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/// [`&str`]: ../primitive.str.html
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/// [`String`]: ../string/struct.String.html
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/// [conversions]: index.html#conversions
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#[stable(feature = "rust1", since = "1.0.0")]
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// FIXME:
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// `OsStr::from_inner` current implementation relies
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// on `OsStr` being layout-compatible with `Slice`.
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// When attribute privacy is implemented, `OsStr` should be annotated as `#[repr(transparent)]`.
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// Anyway, `OsStr` representation and layout are considered implementation detail, are
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// not documented and must not be relied upon.
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pub struct OsStr {
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inner: Slice,
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}
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impl OsString {
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/// Constructs a new empty `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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///
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/// let os_string = OsString::new();
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/// ```
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn new() -> OsString {
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OsString { inner: Buf::from_string(String::new()) }
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}
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/// Converts to an [`OsStr`] slice.
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///
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/// [`OsStr`]: struct.OsStr.html
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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, OsStr};
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///
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/// let os_string = OsString::from("foo");
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/// let os_str = OsStr::new("foo");
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/// assert_eq!(os_string.as_os_str(), os_str);
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/// ```
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn as_os_str(&self) -> &OsStr {
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self
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}
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/// Converts the `OsString` into a [`String`] if it contains valid Unicode data.
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///
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/// On failure, ownership of the original `OsString` is returned.
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///
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/// [`String`]: ../../std/string/struct.String.html
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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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///
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/// let os_string = OsString::from("foo");
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/// let string = os_string.into_string();
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/// assert_eq!(string, Ok(String::from("foo")));
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/// ```
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn into_string(self) -> Result<String, OsString> {
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self.inner.into_string().map_err(|buf| OsString { inner: buf })
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}
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/// Extends the string with the given [`&OsStr`] slice.
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///
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/// [`&OsStr`]: struct.OsStr.html
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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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///
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/// let mut os_string = OsString::from("foo");
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/// os_string.push("bar");
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/// assert_eq!(&os_string, "foobar");
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/// ```
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn push<T: AsRef<OsStr>>(&mut self, s: T) {
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self.inner.push_slice(&s.as_ref().inner)
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}
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/// Creates a new `OsString` with the given capacity.
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///
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/// The string will be able to hold exactly `capacity` length units of other
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/// OS strings without reallocating. If `capacity` is 0, the string will not
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/// allocate.
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///
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/// See main `OsString` documentation information about encoding.
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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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///
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/// let mut os_string = OsString::with_capacity(10);
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/// let capacity = os_string.capacity();
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///
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/// // This push is done without reallocating
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/// os_string.push("foo");
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///
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/// assert_eq!(capacity, os_string.capacity());
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/// ```
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#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
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pub fn with_capacity(capacity: usize) -> OsString {
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OsString { inner: Buf::with_capacity(capacity) }
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}
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/// Truncates the `OsString` to zero length.
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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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///
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/// let mut os_string = OsString::from("foo");
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/// assert_eq!(&os_string, "foo");
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///
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/// os_string.clear();
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/// assert_eq!(&os_string, "");
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/// ```
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#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
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pub fn clear(&mut self) {
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self.inner.clear()
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}
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/// Returns the capacity this `OsString` can hold without reallocating.
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///
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/// See `OsString` introduction for information about encoding.
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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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///
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/// let os_string = OsString::with_capacity(10);
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/// assert!(os_string.capacity() >= 10);
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/// ```
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#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
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pub fn capacity(&self) -> usize {
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self.inner.capacity()
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}
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/// Reserves capacity for at least `additional` more capacity to be inserted
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/// in the given `OsString`.
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///
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/// The collection may reserve more space to avoid frequent reallocations.
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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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///
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/// let mut s = OsString::new();
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/// s.reserve(10);
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/// assert!(s.capacity() >= 10);
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/// ```
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#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
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pub fn reserve(&mut self, additional: usize) {
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self.inner.reserve(additional)
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}
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/// Reserves the minimum capacity for exactly `additional` more capacity to
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/// be inserted in the given `OsString`. Does nothing if the capacity is
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/// already sufficient.
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///
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/// Note that the allocator may give the collection more space than it
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/// requests. Therefore, capacity can not be relied upon to be precisely
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/// minimal. Prefer reserve if future insertions are expected.
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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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///
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/// let mut s = OsString::new();
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/// s.reserve_exact(10);
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/// assert!(s.capacity() >= 10);
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/// ```
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#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
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pub fn reserve_exact(&mut self, additional: usize) {
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self.inner.reserve_exact(additional)
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}
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/// Shrinks the capacity of the `OsString` to match its length.
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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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///
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/// let mut s = OsString::from("foo");
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///
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/// s.reserve(100);
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/// assert!(s.capacity() >= 100);
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///
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/// s.shrink_to_fit();
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/// assert_eq!(3, s.capacity());
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/// ```
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#[stable(feature = "osstring_shrink_to_fit", since = "1.19.0")]
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pub fn shrink_to_fit(&mut self) {
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self.inner.shrink_to_fit()
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}
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/// Shrinks the capacity of the `OsString` with a lower bound.
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///
|
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/// The capacity will remain at least as large as both the length
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/// and the supplied value.
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///
|
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/// Panics if the current capacity is smaller than the supplied
|
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/// minimum capacity.
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||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// #![feature(shrink_to)]
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/// use std::ffi::OsString;
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///
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/// let mut s = OsString::from("foo");
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///
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/// s.reserve(100);
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/// assert!(s.capacity() >= 100);
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///
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/// s.shrink_to(10);
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/// assert!(s.capacity() >= 10);
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/// s.shrink_to(0);
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/// assert!(s.capacity() >= 3);
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/// ```
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#[inline]
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#[unstable(feature = "shrink_to", reason = "new API", issue = "56431")]
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pub fn shrink_to(&mut self, min_capacity: usize) {
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self.inner.shrink_to(min_capacity)
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}
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|
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/// Converts this `OsString` into a boxed [`OsStr`].
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||
///
|
||
/// [`OsStr`]: struct.OsStr.html
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::ffi::{OsString, OsStr};
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///
|
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/// let s = OsString::from("hello");
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///
|
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/// let b: Box<OsStr> = s.into_boxed_os_str();
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/// ```
|
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#[stable(feature = "into_boxed_os_str", since = "1.20.0")]
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pub fn into_boxed_os_str(self) -> Box<OsStr> {
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let rw = Box::into_raw(self.inner.into_box()) as *mut OsStr;
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unsafe { Box::from_raw(rw) }
|
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}
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}
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|
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#[stable(feature = "rust1", since = "1.0.0")]
|
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impl From<String> for OsString {
|
||
/// Converts a [`String`] into a [`OsString`].
|
||
///
|
||
/// The conversion copies the data, and includes an allocation on the heap.
|
||
///
|
||
/// [`OsString`]: ../../std/ffi/struct.OsString.html
|
||
fn from(s: String) -> OsString {
|
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OsString { inner: Buf::from_string(s) }
|
||
}
|
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}
|
||
|
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#[stable(feature = "rust1", since = "1.0.0")]
|
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impl<T: ?Sized + AsRef<OsStr>> From<&T> for OsString {
|
||
fn from(s: &T) -> OsString {
|
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s.as_ref().to_os_string()
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}
|
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}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl ops::Index<ops::RangeFull> for OsString {
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type Output = OsStr;
|
||
|
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#[inline]
|
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fn index(&self, _index: ops::RangeFull) -> &OsStr {
|
||
OsStr::from_inner(self.inner.as_slice())
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||
}
|
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}
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||
|
||
#[stable(feature = "mut_osstr", since = "1.44.0")]
|
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impl ops::IndexMut<ops::RangeFull> for OsString {
|
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#[inline]
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fn index_mut(&mut self, _index: ops::RangeFull) -> &mut OsStr {
|
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OsStr::from_inner_mut(self.inner.as_mut_slice())
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}
|
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}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl ops::Deref for OsString {
|
||
type Target = OsStr;
|
||
|
||
#[inline]
|
||
fn deref(&self) -> &OsStr {
|
||
&self[..]
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "mut_osstr", since = "1.44.0")]
|
||
impl ops::DerefMut for OsString {
|
||
#[inline]
|
||
fn deref_mut(&mut self) -> &mut OsStr {
|
||
&mut self[..]
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "osstring_default", since = "1.9.0")]
|
||
impl Default for OsString {
|
||
/// Constructs an empty `OsString`.
|
||
#[inline]
|
||
fn default() -> OsString {
|
||
OsString::new()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl fmt::Debug for OsString {
|
||
fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
fmt::Debug::fmt(&**self, formatter)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq for OsString {
|
||
fn eq(&self, other: &OsString) -> bool {
|
||
&**self == &**other
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq<str> for OsString {
|
||
fn eq(&self, other: &str) -> bool {
|
||
&**self == other
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq<OsString> for str {
|
||
fn eq(&self, other: &OsString) -> bool {
|
||
&**other == self
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "os_str_str_ref_eq", since = "1.29.0")]
|
||
impl PartialEq<&str> for OsString {
|
||
fn eq(&self, other: &&str) -> bool {
|
||
**self == **other
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "os_str_str_ref_eq", since = "1.29.0")]
|
||
impl<'a> PartialEq<OsString> for &'a str {
|
||
fn eq(&self, other: &OsString) -> bool {
|
||
**other == **self
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Eq for OsString {}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialOrd for OsString {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &OsString) -> Option<cmp::Ordering> {
|
||
(&**self).partial_cmp(&**other)
|
||
}
|
||
#[inline]
|
||
fn lt(&self, other: &OsString) -> bool {
|
||
&**self < &**other
|
||
}
|
||
#[inline]
|
||
fn le(&self, other: &OsString) -> bool {
|
||
&**self <= &**other
|
||
}
|
||
#[inline]
|
||
fn gt(&self, other: &OsString) -> bool {
|
||
&**self > &**other
|
||
}
|
||
#[inline]
|
||
fn ge(&self, other: &OsString) -> bool {
|
||
&**self >= &**other
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialOrd<str> for OsString {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &str) -> Option<cmp::Ordering> {
|
||
(&**self).partial_cmp(other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Ord for OsString {
|
||
#[inline]
|
||
fn cmp(&self, other: &OsString) -> cmp::Ordering {
|
||
(&**self).cmp(&**other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Hash for OsString {
|
||
#[inline]
|
||
fn hash<H: Hasher>(&self, state: &mut H) {
|
||
(&**self).hash(state)
|
||
}
|
||
}
|
||
|
||
impl OsStr {
|
||
/// Coerces into an `OsStr` slice.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// let os_str = OsStr::new("foo");
|
||
/// ```
|
||
#[inline]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn new<S: AsRef<OsStr> + ?Sized>(s: &S) -> &OsStr {
|
||
s.as_ref()
|
||
}
|
||
|
||
#[inline]
|
||
fn from_inner(inner: &Slice) -> &OsStr {
|
||
// Safety: OsStr is just a wrapper of Slice,
|
||
// therefore converting &Slice to &OsStr is safe.
|
||
unsafe { &*(inner as *const Slice as *const OsStr) }
|
||
}
|
||
|
||
#[inline]
|
||
fn from_inner_mut(inner: &mut Slice) -> &mut OsStr {
|
||
// Safety: OsStr is just a wrapper of Slice,
|
||
// therefore converting &mut Slice to &mut OsStr is safe.
|
||
// Any method that mutates OsStr must be careful not to
|
||
// break platform-specific encoding, in particular Wtf8 on Windows.
|
||
unsafe { &mut *(inner as *mut Slice as *mut OsStr) }
|
||
}
|
||
|
||
/// Yields a [`&str`] slice if the `OsStr` is valid Unicode.
|
||
///
|
||
/// This conversion may entail doing a check for UTF-8 validity.
|
||
///
|
||
/// [`&str`]: ../../std/primitive.str.html
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// let os_str = OsStr::new("foo");
|
||
/// assert_eq!(os_str.to_str(), Some("foo"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn to_str(&self) -> Option<&str> {
|
||
self.inner.to_str()
|
||
}
|
||
|
||
/// Converts an `OsStr` to a [`Cow`]`<`[`str`]`>`.
|
||
///
|
||
/// Any non-Unicode sequences are replaced with
|
||
/// [`U+FFFD REPLACEMENT CHARACTER`][U+FFFD].
|
||
///
|
||
/// [`Cow`]: ../../std/borrow/enum.Cow.html
|
||
/// [`str`]: ../../std/primitive.str.html
|
||
/// [U+FFFD]: ../../std/char/constant.REPLACEMENT_CHARACTER.html
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// Calling `to_string_lossy` on an `OsStr` with invalid unicode:
|
||
///
|
||
/// ```
|
||
/// // Note, due to differences in how Unix and Windows represent strings,
|
||
/// // we are forced to complicate this example, setting up example `OsStr`s
|
||
/// // with different source data and via different platform extensions.
|
||
/// // Understand that in reality you could end up with such example invalid
|
||
/// // sequences simply through collecting user command line arguments, for
|
||
/// // example.
|
||
///
|
||
/// #[cfg(any(unix, target_os = "redox"))] {
|
||
/// use std::ffi::OsStr;
|
||
/// use std::os::unix::ffi::OsStrExt;
|
||
///
|
||
/// // Here, the values 0x66 and 0x6f correspond to 'f' and 'o'
|
||
/// // respectively. The value 0x80 is a lone continuation byte, invalid
|
||
/// // in a UTF-8 sequence.
|
||
/// let source = [0x66, 0x6f, 0x80, 0x6f];
|
||
/// let os_str = OsStr::from_bytes(&source[..]);
|
||
///
|
||
/// assert_eq!(os_str.to_string_lossy(), "fo<66>o");
|
||
/// }
|
||
/// #[cfg(windows)] {
|
||
/// use std::ffi::OsString;
|
||
/// use std::os::windows::prelude::*;
|
||
///
|
||
/// // Here the values 0x0066 and 0x006f correspond to 'f' and 'o'
|
||
/// // respectively. The value 0xD800 is a lone surrogate half, invalid
|
||
/// // in a UTF-16 sequence.
|
||
/// let source = [0x0066, 0x006f, 0xD800, 0x006f];
|
||
/// let os_string = OsString::from_wide(&source[..]);
|
||
/// let os_str = os_string.as_os_str();
|
||
///
|
||
/// assert_eq!(os_str.to_string_lossy(), "fo<66>o");
|
||
/// }
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn to_string_lossy(&self) -> Cow<'_, str> {
|
||
self.inner.to_string_lossy()
|
||
}
|
||
|
||
/// Copies the slice into an owned [`OsString`].
|
||
///
|
||
/// [`OsString`]: struct.OsString.html
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::ffi::{OsStr, OsString};
|
||
///
|
||
/// let os_str = OsStr::new("foo");
|
||
/// let os_string = os_str.to_os_string();
|
||
/// assert_eq!(os_string, OsString::from("foo"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn to_os_string(&self) -> OsString {
|
||
OsString { inner: self.inner.to_owned() }
|
||
}
|
||
|
||
/// Checks whether the `OsStr` is empty.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// let os_str = OsStr::new("");
|
||
/// assert!(os_str.is_empty());
|
||
///
|
||
/// let os_str = OsStr::new("foo");
|
||
/// assert!(!os_str.is_empty());
|
||
/// ```
|
||
#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
|
||
#[inline]
|
||
pub fn is_empty(&self) -> bool {
|
||
self.inner.inner.is_empty()
|
||
}
|
||
|
||
/// Returns the length of this `OsStr`.
|
||
///
|
||
/// Note that this does **not** return the number of bytes in the string in
|
||
/// OS string form.
|
||
///
|
||
/// The length returned is that of the underlying storage used by `OsStr`.
|
||
/// As discussed in the [`OsString`] introduction, [`OsString`] and `OsStr`
|
||
/// store strings in a form best suited for cheap inter-conversion between
|
||
/// native-platform and Rust string forms, which may differ significantly
|
||
/// from both of them, including in storage size and encoding.
|
||
///
|
||
/// This number is simply useful for passing to other methods, like
|
||
/// [`OsString::with_capacity`] to avoid reallocations.
|
||
///
|
||
/// [`OsString`]: struct.OsString.html
|
||
/// [`OsString::with_capacity`]: struct.OsString.html#method.with_capacity
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// let os_str = OsStr::new("");
|
||
/// assert_eq!(os_str.len(), 0);
|
||
///
|
||
/// let os_str = OsStr::new("foo");
|
||
/// assert_eq!(os_str.len(), 3);
|
||
/// ```
|
||
#[stable(feature = "osstring_simple_functions", since = "1.9.0")]
|
||
pub fn len(&self) -> usize {
|
||
self.inner.inner.len()
|
||
}
|
||
|
||
/// Converts a [`Box`]`<OsStr>` into an [`OsString`] without copying or allocating.
|
||
///
|
||
/// [`Box`]: ../boxed/struct.Box.html
|
||
/// [`OsString`]: struct.OsString.html
|
||
#[stable(feature = "into_boxed_os_str", since = "1.20.0")]
|
||
pub fn into_os_string(self: Box<OsStr>) -> OsString {
|
||
let boxed = unsafe { Box::from_raw(Box::into_raw(self) as *mut Slice) };
|
||
OsString { inner: Buf::from_box(boxed) }
|
||
}
|
||
|
||
/// Gets the underlying byte representation.
|
||
///
|
||
/// Note: it is *crucial* that this API is private, to avoid
|
||
/// revealing the internal, platform-specific encodings.
|
||
#[inline]
|
||
fn bytes(&self) -> &[u8] {
|
||
unsafe { &*(&self.inner as *const _ as *const [u8]) }
|
||
}
|
||
|
||
/// Converts this string to its ASCII lower case equivalent in-place.
|
||
///
|
||
/// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',
|
||
/// but non-ASCII letters are unchanged.
|
||
///
|
||
/// To return a new lowercased value without modifying the existing one, use
|
||
/// [`to_ascii_lowercase`].
|
||
///
|
||
/// [`to_ascii_lowercase`]: #method.to_ascii_lowercase
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// #![feature(osstring_ascii)]
|
||
/// use std::ffi::OsString;
|
||
///
|
||
/// let mut s = OsString::from("GRÜßE, JÜRGEN ❤");
|
||
///
|
||
/// s.make_ascii_lowercase();
|
||
///
|
||
/// assert_eq!("grÜße, jÜrgen ❤", s);
|
||
/// ```
|
||
#[unstable(feature = "osstring_ascii", issue = "70516")]
|
||
pub fn make_ascii_lowercase(&mut self) {
|
||
self.inner.make_ascii_lowercase()
|
||
}
|
||
|
||
/// Converts this string to its ASCII upper case equivalent in-place.
|
||
///
|
||
/// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',
|
||
/// but non-ASCII letters are unchanged.
|
||
///
|
||
/// To return a new uppercased value without modifying the existing one, use
|
||
/// [`to_ascii_uppercase`].
|
||
///
|
||
/// [`to_ascii_uppercase`]: #method.to_ascii_uppercase
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// #![feature(osstring_ascii)]
|
||
/// use std::ffi::OsString;
|
||
///
|
||
/// let mut s = OsString::from("Grüße, Jürgen ❤");
|
||
///
|
||
/// s.make_ascii_uppercase();
|
||
///
|
||
/// assert_eq!("GRüßE, JüRGEN ❤", s);
|
||
/// ```
|
||
#[unstable(feature = "osstring_ascii", issue = "70516")]
|
||
pub fn make_ascii_uppercase(&mut self) {
|
||
self.inner.make_ascii_uppercase()
|
||
}
|
||
|
||
/// Returns a copy of this string where each character is mapped to its
|
||
/// ASCII lower case equivalent.
|
||
///
|
||
/// ASCII letters 'A' to 'Z' are mapped to 'a' to 'z',
|
||
/// but non-ASCII letters are unchanged.
|
||
///
|
||
/// To lowercase the value in-place, use [`make_ascii_lowercase`].
|
||
///
|
||
/// [`make_ascii_lowercase`]: #method.make_ascii_lowercase
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// #![feature(osstring_ascii)]
|
||
/// use std::ffi::OsString;
|
||
/// let s = OsString::from("Grüße, Jürgen ❤");
|
||
///
|
||
/// assert_eq!("grüße, jürgen ❤", s.to_ascii_lowercase());
|
||
/// ```
|
||
#[unstable(feature = "osstring_ascii", issue = "70516")]
|
||
pub fn to_ascii_lowercase(&self) -> OsString {
|
||
OsString::from_inner(self.inner.to_ascii_lowercase())
|
||
}
|
||
|
||
/// Returns a copy of this string where each character is mapped to its
|
||
/// ASCII upper case equivalent.
|
||
///
|
||
/// ASCII letters 'a' to 'z' are mapped to 'A' to 'Z',
|
||
/// but non-ASCII letters are unchanged.
|
||
///
|
||
/// To uppercase the value in-place, use [`make_ascii_uppercase`].
|
||
///
|
||
/// [`make_ascii_uppercase`]: #method.make_ascii_uppercase
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// #![feature(osstring_ascii)]
|
||
/// use std::ffi::OsString;
|
||
/// let s = OsString::from("Grüße, Jürgen ❤");
|
||
///
|
||
/// assert_eq!("GRüßE, JüRGEN ❤", s.to_ascii_uppercase());
|
||
/// ```
|
||
#[unstable(feature = "osstring_ascii", issue = "70516")]
|
||
pub fn to_ascii_uppercase(&self) -> OsString {
|
||
OsString::from_inner(self.inner.to_ascii_uppercase())
|
||
}
|
||
|
||
/// Checks if all characters in this string are within the ASCII range.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// #![feature(osstring_ascii)]
|
||
/// use std::ffi::OsString;
|
||
///
|
||
/// let ascii = OsString::from("hello!\n");
|
||
/// let non_ascii = OsString::from("Grüße, Jürgen ❤");
|
||
///
|
||
/// assert!(ascii.is_ascii());
|
||
/// assert!(!non_ascii.is_ascii());
|
||
/// ```
|
||
#[unstable(feature = "osstring_ascii", issue = "70516")]
|
||
pub fn is_ascii(&self) -> bool {
|
||
self.inner.is_ascii()
|
||
}
|
||
|
||
/// Checks that two strings are an ASCII case-insensitive match.
|
||
///
|
||
/// Same as `to_ascii_lowercase(a) == to_ascii_lowercase(b)`,
|
||
/// but without allocating and copying temporaries.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// #![feature(osstring_ascii)]
|
||
/// use std::ffi::OsString;
|
||
///
|
||
/// assert!(OsString::from("Ferris").eq_ignore_ascii_case("FERRIS"));
|
||
/// assert!(OsString::from("Ferrös").eq_ignore_ascii_case("FERRöS"));
|
||
/// assert!(!OsString::from("Ferrös").eq_ignore_ascii_case("FERRÖS"));
|
||
/// ```
|
||
#[unstable(feature = "osstring_ascii", issue = "70516")]
|
||
pub fn eq_ignore_ascii_case<S: ?Sized + AsRef<OsStr>>(&self, other: &S) -> bool {
|
||
self.inner.eq_ignore_ascii_case(&other.as_ref().inner)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "box_from_os_str", since = "1.17.0")]
|
||
impl From<&OsStr> for Box<OsStr> {
|
||
fn from(s: &OsStr) -> Box<OsStr> {
|
||
let rw = Box::into_raw(s.inner.into_box()) as *mut OsStr;
|
||
unsafe { Box::from_raw(rw) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "os_string_from_box", since = "1.18.0")]
|
||
impl From<Box<OsStr>> for OsString {
|
||
/// Converts a [`Box`]`<`[`OsStr`]`>` into a `OsString` without copying or
|
||
/// allocating.
|
||
///
|
||
/// [`Box`]: ../boxed/struct.Box.html
|
||
/// [`OsStr`]: ../ffi/struct.OsStr.html
|
||
fn from(boxed: Box<OsStr>) -> OsString {
|
||
boxed.into_os_string()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "box_from_os_string", since = "1.20.0")]
|
||
impl From<OsString> for Box<OsStr> {
|
||
/// Converts a [`OsString`] into a [`Box`]`<OsStr>` without copying or allocating.
|
||
///
|
||
/// [`Box`]: ../boxed/struct.Box.html
|
||
/// [`OsString`]: ../ffi/struct.OsString.html
|
||
fn from(s: OsString) -> Box<OsStr> {
|
||
s.into_boxed_os_str()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "more_box_slice_clone", since = "1.29.0")]
|
||
impl Clone for Box<OsStr> {
|
||
#[inline]
|
||
fn clone(&self) -> Self {
|
||
self.to_os_string().into_boxed_os_str()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<OsString> for Arc<OsStr> {
|
||
/// Converts a [`OsString`] into a [`Arc`]`<OsStr>` without copying or allocating.
|
||
///
|
||
/// [`Arc`]: ../sync/struct.Arc.html
|
||
/// [`OsString`]: ../ffi/struct.OsString.html
|
||
#[inline]
|
||
fn from(s: OsString) -> Arc<OsStr> {
|
||
let arc = s.inner.into_arc();
|
||
unsafe { Arc::from_raw(Arc::into_raw(arc) as *const OsStr) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<&OsStr> for Arc<OsStr> {
|
||
#[inline]
|
||
fn from(s: &OsStr) -> Arc<OsStr> {
|
||
let arc = s.inner.into_arc();
|
||
unsafe { Arc::from_raw(Arc::into_raw(arc) as *const OsStr) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<OsString> for Rc<OsStr> {
|
||
/// Converts a [`OsString`] into a [`Rc`]`<OsStr>` without copying or allocating.
|
||
///
|
||
/// [`Rc`]: ../rc/struct.Rc.html
|
||
/// [`OsString`]: ../ffi/struct.OsString.html
|
||
#[inline]
|
||
fn from(s: OsString) -> Rc<OsStr> {
|
||
let rc = s.inner.into_rc();
|
||
unsafe { Rc::from_raw(Rc::into_raw(rc) as *const OsStr) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<&OsStr> for Rc<OsStr> {
|
||
#[inline]
|
||
fn from(s: &OsStr) -> Rc<OsStr> {
|
||
let rc = s.inner.into_rc();
|
||
unsafe { Rc::from_raw(Rc::into_raw(rc) as *const OsStr) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cow_from_osstr", since = "1.28.0")]
|
||
impl<'a> From<OsString> for Cow<'a, OsStr> {
|
||
#[inline]
|
||
fn from(s: OsString) -> Cow<'a, OsStr> {
|
||
Cow::Owned(s)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cow_from_osstr", since = "1.28.0")]
|
||
impl<'a> From<&'a OsStr> for Cow<'a, OsStr> {
|
||
#[inline]
|
||
fn from(s: &'a OsStr) -> Cow<'a, OsStr> {
|
||
Cow::Borrowed(s)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cow_from_osstr", since = "1.28.0")]
|
||
impl<'a> From<&'a OsString> for Cow<'a, OsStr> {
|
||
#[inline]
|
||
fn from(s: &'a OsString) -> Cow<'a, OsStr> {
|
||
Cow::Borrowed(s.as_os_str())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "osstring_from_cow_osstr", since = "1.28.0")]
|
||
impl<'a> From<Cow<'a, OsStr>> for OsString {
|
||
#[inline]
|
||
fn from(s: Cow<'a, OsStr>) -> Self {
|
||
s.into_owned()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "box_default_extra", since = "1.17.0")]
|
||
impl Default for Box<OsStr> {
|
||
fn default() -> Box<OsStr> {
|
||
let rw = Box::into_raw(Slice::empty_box()) as *mut OsStr;
|
||
unsafe { Box::from_raw(rw) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "osstring_default", since = "1.9.0")]
|
||
impl Default for &OsStr {
|
||
/// Creates an empty `OsStr`.
|
||
#[inline]
|
||
fn default() -> Self {
|
||
OsStr::new("")
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq for OsStr {
|
||
#[inline]
|
||
fn eq(&self, other: &OsStr) -> bool {
|
||
self.bytes().eq(other.bytes())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq<str> for OsStr {
|
||
#[inline]
|
||
fn eq(&self, other: &str) -> bool {
|
||
*self == *OsStr::new(other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq<OsStr> for str {
|
||
#[inline]
|
||
fn eq(&self, other: &OsStr) -> bool {
|
||
*other == *OsStr::new(self)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Eq for OsStr {}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialOrd for OsStr {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &OsStr) -> Option<cmp::Ordering> {
|
||
self.bytes().partial_cmp(other.bytes())
|
||
}
|
||
#[inline]
|
||
fn lt(&self, other: &OsStr) -> bool {
|
||
self.bytes().lt(other.bytes())
|
||
}
|
||
#[inline]
|
||
fn le(&self, other: &OsStr) -> bool {
|
||
self.bytes().le(other.bytes())
|
||
}
|
||
#[inline]
|
||
fn gt(&self, other: &OsStr) -> bool {
|
||
self.bytes().gt(other.bytes())
|
||
}
|
||
#[inline]
|
||
fn ge(&self, other: &OsStr) -> bool {
|
||
self.bytes().ge(other.bytes())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialOrd<str> for OsStr {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &str) -> Option<cmp::Ordering> {
|
||
self.partial_cmp(OsStr::new(other))
|
||
}
|
||
}
|
||
|
||
// FIXME (#19470): cannot provide PartialOrd<OsStr> for str until we
|
||
// have more flexible coherence rules.
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Ord for OsStr {
|
||
#[inline]
|
||
fn cmp(&self, other: &OsStr) -> cmp::Ordering {
|
||
self.bytes().cmp(other.bytes())
|
||
}
|
||
}
|
||
|
||
macro_rules! impl_cmp {
|
||
($lhs:ty, $rhs: ty) => {
|
||
#[stable(feature = "cmp_os_str", since = "1.8.0")]
|
||
impl<'a, 'b> PartialEq<$rhs> for $lhs {
|
||
#[inline]
|
||
fn eq(&self, other: &$rhs) -> bool {
|
||
<OsStr as PartialEq>::eq(self, other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_os_str", since = "1.8.0")]
|
||
impl<'a, 'b> PartialEq<$lhs> for $rhs {
|
||
#[inline]
|
||
fn eq(&self, other: &$lhs) -> bool {
|
||
<OsStr as PartialEq>::eq(self, other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_os_str", since = "1.8.0")]
|
||
impl<'a, 'b> PartialOrd<$rhs> for $lhs {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &$rhs) -> Option<cmp::Ordering> {
|
||
<OsStr as PartialOrd>::partial_cmp(self, other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_os_str", since = "1.8.0")]
|
||
impl<'a, 'b> PartialOrd<$lhs> for $rhs {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &$lhs) -> Option<cmp::Ordering> {
|
||
<OsStr as PartialOrd>::partial_cmp(self, other)
|
||
}
|
||
}
|
||
};
|
||
}
|
||
|
||
impl_cmp!(OsString, OsStr);
|
||
impl_cmp!(OsString, &'a OsStr);
|
||
impl_cmp!(Cow<'a, OsStr>, OsStr);
|
||
impl_cmp!(Cow<'a, OsStr>, &'b OsStr);
|
||
impl_cmp!(Cow<'a, OsStr>, OsString);
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Hash for OsStr {
|
||
#[inline]
|
||
fn hash<H: Hasher>(&self, state: &mut H) {
|
||
self.bytes().hash(state)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl fmt::Debug for OsStr {
|
||
fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
fmt::Debug::fmt(&self.inner, formatter)
|
||
}
|
||
}
|
||
|
||
impl OsStr {
|
||
pub(crate) fn display(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
fmt::Display::fmt(&self.inner, formatter)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Borrow<OsStr> for OsString {
|
||
fn borrow(&self) -> &OsStr {
|
||
&self[..]
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl ToOwned for OsStr {
|
||
type Owned = OsString;
|
||
fn to_owned(&self) -> OsString {
|
||
self.to_os_string()
|
||
}
|
||
fn clone_into(&self, target: &mut OsString) {
|
||
self.inner.clone_into(&mut target.inner)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for OsStr {
|
||
fn as_ref(&self) -> &OsStr {
|
||
self
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for OsString {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
self
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for str {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
OsStr::from_inner(Slice::from_str(self))
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for String {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
(&**self).as_ref()
|
||
}
|
||
}
|
||
|
||
impl FromInner<Buf> for OsString {
|
||
fn from_inner(buf: Buf) -> OsString {
|
||
OsString { inner: buf }
|
||
}
|
||
}
|
||
|
||
impl IntoInner<Buf> for OsString {
|
||
fn into_inner(self) -> Buf {
|
||
self.inner
|
||
}
|
||
}
|
||
|
||
impl AsInner<Slice> for OsStr {
|
||
#[inline]
|
||
fn as_inner(&self) -> &Slice {
|
||
&self.inner
|
||
}
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
use crate::sys_common::{AsInner, IntoInner};
|
||
|
||
use crate::rc::Rc;
|
||
use crate::sync::Arc;
|
||
|
||
#[test]
|
||
fn test_os_string_with_capacity() {
|
||
let os_string = OsString::with_capacity(0);
|
||
assert_eq!(0, os_string.inner.into_inner().capacity());
|
||
|
||
let os_string = OsString::with_capacity(10);
|
||
assert_eq!(10, os_string.inner.into_inner().capacity());
|
||
|
||
let mut os_string = OsString::with_capacity(0);
|
||
os_string.push("abc");
|
||
assert!(os_string.inner.into_inner().capacity() >= 3);
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_string_clear() {
|
||
let mut os_string = OsString::from("abc");
|
||
assert_eq!(3, os_string.inner.as_inner().len());
|
||
|
||
os_string.clear();
|
||
assert_eq!(&os_string, "");
|
||
assert_eq!(0, os_string.inner.as_inner().len());
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_string_capacity() {
|
||
let os_string = OsString::with_capacity(0);
|
||
assert_eq!(0, os_string.capacity());
|
||
|
||
let os_string = OsString::with_capacity(10);
|
||
assert_eq!(10, os_string.capacity());
|
||
|
||
let mut os_string = OsString::with_capacity(0);
|
||
os_string.push("abc");
|
||
assert!(os_string.capacity() >= 3);
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_string_reserve() {
|
||
let mut os_string = OsString::new();
|
||
assert_eq!(os_string.capacity(), 0);
|
||
|
||
os_string.reserve(2);
|
||
assert!(os_string.capacity() >= 2);
|
||
|
||
for _ in 0..16 {
|
||
os_string.push("a");
|
||
}
|
||
|
||
assert!(os_string.capacity() >= 16);
|
||
os_string.reserve(16);
|
||
assert!(os_string.capacity() >= 32);
|
||
|
||
os_string.push("a");
|
||
|
||
os_string.reserve(16);
|
||
assert!(os_string.capacity() >= 33)
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_string_reserve_exact() {
|
||
let mut os_string = OsString::new();
|
||
assert_eq!(os_string.capacity(), 0);
|
||
|
||
os_string.reserve_exact(2);
|
||
assert!(os_string.capacity() >= 2);
|
||
|
||
for _ in 0..16 {
|
||
os_string.push("a");
|
||
}
|
||
|
||
assert!(os_string.capacity() >= 16);
|
||
os_string.reserve_exact(16);
|
||
assert!(os_string.capacity() >= 32);
|
||
|
||
os_string.push("a");
|
||
|
||
os_string.reserve_exact(16);
|
||
assert!(os_string.capacity() >= 33)
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_string_default() {
|
||
let os_string: OsString = Default::default();
|
||
assert_eq!("", &os_string);
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_str_is_empty() {
|
||
let mut os_string = OsString::new();
|
||
assert!(os_string.is_empty());
|
||
|
||
os_string.push("abc");
|
||
assert!(!os_string.is_empty());
|
||
|
||
os_string.clear();
|
||
assert!(os_string.is_empty());
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_str_len() {
|
||
let mut os_string = OsString::new();
|
||
assert_eq!(0, os_string.len());
|
||
|
||
os_string.push("abc");
|
||
assert_eq!(3, os_string.len());
|
||
|
||
os_string.clear();
|
||
assert_eq!(0, os_string.len());
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_str_default() {
|
||
let os_str: &OsStr = Default::default();
|
||
assert_eq!("", os_str);
|
||
}
|
||
|
||
#[test]
|
||
fn into_boxed() {
|
||
let orig = "Hello, world!";
|
||
let os_str = OsStr::new(orig);
|
||
let boxed: Box<OsStr> = Box::from(os_str);
|
||
let os_string = os_str.to_owned().into_boxed_os_str().into_os_string();
|
||
assert_eq!(os_str, &*boxed);
|
||
assert_eq!(&*boxed, &*os_string);
|
||
assert_eq!(&*os_string, os_str);
|
||
}
|
||
|
||
#[test]
|
||
fn boxed_default() {
|
||
let boxed = <Box<OsStr>>::default();
|
||
assert!(boxed.is_empty());
|
||
}
|
||
|
||
#[test]
|
||
fn test_os_str_clone_into() {
|
||
let mut os_string = OsString::with_capacity(123);
|
||
os_string.push("hello");
|
||
let os_str = OsStr::new("bonjour");
|
||
os_str.clone_into(&mut os_string);
|
||
assert_eq!(os_str, os_string);
|
||
assert!(os_string.capacity() >= 123);
|
||
}
|
||
|
||
#[test]
|
||
fn into_rc() {
|
||
let orig = "Hello, world!";
|
||
let os_str = OsStr::new(orig);
|
||
let rc: Rc<OsStr> = Rc::from(os_str);
|
||
let arc: Arc<OsStr> = Arc::from(os_str);
|
||
|
||
assert_eq!(&*rc, os_str);
|
||
assert_eq!(&*arc, os_str);
|
||
|
||
let rc2: Rc<OsStr> = Rc::from(os_str.to_owned());
|
||
let arc2: Arc<OsStr> = Arc::from(os_str.to_owned());
|
||
|
||
assert_eq!(&*rc2, os_str);
|
||
assert_eq!(&*arc2, os_str);
|
||
}
|
||
}
|