3372 lines
107 KiB
Rust
3372 lines
107 KiB
Rust
//! Cross-platform path manipulation.
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//!
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//! This module provides two types, [`PathBuf`] and [`Path`] (akin to [`String`]
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//! and [`str`]), for working with paths abstractly. These types are thin wrappers
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//! around [`OsString`] and [`OsStr`] respectively, meaning that they work directly
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//! on strings according to the local platform's path syntax.
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//!
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//! Paths can be parsed into [`Component`]s by iterating over the structure
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//! returned by the [`components`] method on [`Path`]. [`Component`]s roughly
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//! correspond to the substrings between path separators (`/` or `\`). You can
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//! reconstruct an equivalent path from components with the [`push`] method on
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//! [`PathBuf`]; note that the paths may differ syntactically by the
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//! normalization described in the documentation for the [`components`] method.
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//!
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//! ## Case sensitivity
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//!
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//! Unless otherwise indicated path methods that do not access the filesystem,
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//! such as [`Path::starts_with`] and [`Path::ends_with`], are case sensitive no
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//! matter the platform or filesystem. An exception to this is made for Windows
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//! drive letters.
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//!
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//! ## Simple usage
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//!
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//! Path manipulation includes both parsing components from slices and building
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//! new owned paths.
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//!
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//! To parse a path, you can create a [`Path`] slice from a [`str`]
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//! slice and start asking questions:
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//!
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//! ```
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//! use std::path::Path;
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//! use std::ffi::OsStr;
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//!
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//! let path = Path::new("/tmp/foo/bar.txt");
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//!
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//! let parent = path.parent();
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//! assert_eq!(parent, Some(Path::new("/tmp/foo")));
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//!
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//! let file_stem = path.file_stem();
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//! assert_eq!(file_stem, Some(OsStr::new("bar")));
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//!
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//! let extension = path.extension();
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//! assert_eq!(extension, Some(OsStr::new("txt")));
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//! ```
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//!
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//! To build or modify paths, use [`PathBuf`]:
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//!
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//! ```
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//! use std::path::PathBuf;
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//!
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//! // This way works...
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//! let mut path = PathBuf::from("c:\\");
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//!
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//! path.push("windows");
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//! path.push("system32");
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//!
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//! path.set_extension("dll");
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//!
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//! // ... but push is best used if you don't know everything up
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//! // front. If you do, this way is better:
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//! let path: PathBuf = ["c:\\", "windows", "system32.dll"].iter().collect();
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//! ```
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//!
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//! [`components`]: Path::components
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//! [`push`]: PathBuf::push
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#![stable(feature = "rust1", since = "1.0.0")]
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#![deny(unsafe_op_in_unsafe_fn)]
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#[cfg(test)]
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mod tests;
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use crate::borrow::{Borrow, Cow};
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use crate::cmp;
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use crate::collections::TryReserveError;
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use crate::error::Error;
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use crate::fmt;
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use crate::fs;
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use crate::hash::{Hash, Hasher};
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use crate::io;
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use crate::iter::FusedIterator;
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use crate::ops::{self, Deref};
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use crate::rc::Rc;
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use crate::str::FromStr;
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use crate::sync::Arc;
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use crate::ffi::{OsStr, OsString};
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use crate::sys;
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use crate::sys::path::{is_sep_byte, is_verbatim_sep, parse_prefix, MAIN_SEP_STR};
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////////////////////////////////////////////////////////////////////////////////
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// GENERAL NOTES
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////////////////////////////////////////////////////////////////////////////////
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//
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// Parsing in this module is done by directly transmuting OsStr to [u8] slices,
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// taking advantage of the fact that OsStr always encodes ASCII characters
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// as-is. Eventually, this transmutation should be replaced by direct uses of
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// OsStr APIs for parsing, but it will take a while for those to become
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// available.
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////////////////////////////////////////////////////////////////////////////////
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// Windows Prefixes
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////////////////////////////////////////////////////////////////////////////////
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/// Windows path prefixes, e.g., `C:` or `\\server\share`.
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///
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/// Windows uses a variety of path prefix styles, including references to drive
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/// volumes (like `C:`), network shared folders (like `\\server\share`), and
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/// others. In addition, some path prefixes are "verbatim" (i.e., prefixed with
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/// `\\?\`), in which case `/` is *not* treated as a separator and essentially
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/// no normalization is performed.
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///
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/// # Examples
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///
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/// ```
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/// use std::path::{Component, Path, Prefix};
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/// use std::path::Prefix::*;
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/// use std::ffi::OsStr;
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///
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/// fn get_path_prefix(s: &str) -> Prefix<'_> {
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/// let path = Path::new(s);
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/// match path.components().next().unwrap() {
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/// Component::Prefix(prefix_component) => prefix_component.kind(),
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/// _ => panic!(),
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/// }
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/// }
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///
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/// # if cfg!(windows) {
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/// assert_eq!(Verbatim(OsStr::new("pictures")),
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/// get_path_prefix(r"\\?\pictures\kittens"));
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/// assert_eq!(VerbatimUNC(OsStr::new("server"), OsStr::new("share")),
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/// get_path_prefix(r"\\?\UNC\server\share"));
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/// assert_eq!(VerbatimDisk(b'C'), get_path_prefix(r"\\?\c:\"));
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/// assert_eq!(DeviceNS(OsStr::new("BrainInterface")),
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/// get_path_prefix(r"\\.\BrainInterface"));
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/// assert_eq!(UNC(OsStr::new("server"), OsStr::new("share")),
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/// get_path_prefix(r"\\server\share"));
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/// assert_eq!(Disk(b'C'), get_path_prefix(r"C:\Users\Rust\Pictures\Ferris"));
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/// # }
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/// ```
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#[derive(Copy, Clone, Debug, Hash, PartialOrd, Ord, PartialEq, Eq)]
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#[stable(feature = "rust1", since = "1.0.0")]
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pub enum Prefix<'a> {
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/// Verbatim prefix, e.g., `\\?\cat_pics`.
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///
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/// Verbatim prefixes consist of `\\?\` immediately followed by the given
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/// component.
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#[stable(feature = "rust1", since = "1.0.0")]
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Verbatim(#[stable(feature = "rust1", since = "1.0.0")] &'a OsStr),
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/// Verbatim prefix using Windows' _**U**niform **N**aming **C**onvention_,
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/// e.g., `\\?\UNC\server\share`.
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///
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/// Verbatim UNC prefixes consist of `\\?\UNC\` immediately followed by the
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/// server's hostname and a share name.
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#[stable(feature = "rust1", since = "1.0.0")]
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VerbatimUNC(
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#[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
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#[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
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),
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/// Verbatim disk prefix, e.g., `\\?\C:`.
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///
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/// Verbatim disk prefixes consist of `\\?\` immediately followed by the
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/// drive letter and `:`.
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#[stable(feature = "rust1", since = "1.0.0")]
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VerbatimDisk(#[stable(feature = "rust1", since = "1.0.0")] u8),
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/// Device namespace prefix, e.g., `\\.\COM42`.
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///
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/// Device namespace prefixes consist of `\\.\` (possibly using `/`
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/// instead of `\`), immediately followed by the device name.
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#[stable(feature = "rust1", since = "1.0.0")]
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DeviceNS(#[stable(feature = "rust1", since = "1.0.0")] &'a OsStr),
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/// Prefix using Windows' _**U**niform **N**aming **C**onvention_, e.g.
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/// `\\server\share`.
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///
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/// UNC prefixes consist of the server's hostname and a share name.
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#[stable(feature = "rust1", since = "1.0.0")]
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UNC(
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#[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
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#[stable(feature = "rust1", since = "1.0.0")] &'a OsStr,
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),
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/// Prefix `C:` for the given disk drive.
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#[stable(feature = "rust1", since = "1.0.0")]
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Disk(#[stable(feature = "rust1", since = "1.0.0")] u8),
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}
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impl<'a> Prefix<'a> {
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#[inline]
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fn len(&self) -> usize {
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use self::Prefix::*;
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fn os_str_len(s: &OsStr) -> usize {
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s.as_os_str_bytes().len()
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}
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match *self {
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Verbatim(x) => 4 + os_str_len(x),
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VerbatimUNC(x, y) => {
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8 + os_str_len(x) + if os_str_len(y) > 0 { 1 + os_str_len(y) } else { 0 }
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}
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VerbatimDisk(_) => 6,
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UNC(x, y) => 2 + os_str_len(x) + if os_str_len(y) > 0 { 1 + os_str_len(y) } else { 0 },
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DeviceNS(x) => 4 + os_str_len(x),
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Disk(_) => 2,
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}
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}
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/// Determines if the prefix is verbatim, i.e., begins with `\\?\`.
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///
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/// # Examples
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///
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/// ```
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/// use std::path::Prefix::*;
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/// use std::ffi::OsStr;
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///
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/// assert!(Verbatim(OsStr::new("pictures")).is_verbatim());
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/// assert!(VerbatimUNC(OsStr::new("server"), OsStr::new("share")).is_verbatim());
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/// assert!(VerbatimDisk(b'C').is_verbatim());
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/// assert!(!DeviceNS(OsStr::new("BrainInterface")).is_verbatim());
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/// assert!(!UNC(OsStr::new("server"), OsStr::new("share")).is_verbatim());
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/// assert!(!Disk(b'C').is_verbatim());
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/// ```
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#[inline]
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#[must_use]
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn is_verbatim(&self) -> bool {
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use self::Prefix::*;
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matches!(*self, Verbatim(_) | VerbatimDisk(_) | VerbatimUNC(..))
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}
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#[inline]
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fn is_drive(&self) -> bool {
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matches!(*self, Prefix::Disk(_))
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}
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#[inline]
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fn has_implicit_root(&self) -> bool {
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!self.is_drive()
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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// Exposed parsing helpers
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////////////////////////////////////////////////////////////////////////////////
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/// Determines whether the character is one of the permitted path
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/// separators for the current platform.
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///
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/// # Examples
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///
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/// ```
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/// use std::path;
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///
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/// assert!(path::is_separator('/')); // '/' works for both Unix and Windows
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/// assert!(!path::is_separator('❤'));
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/// ```
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#[must_use]
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#[stable(feature = "rust1", since = "1.0.0")]
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pub fn is_separator(c: char) -> bool {
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c.is_ascii() && is_sep_byte(c as u8)
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}
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/// The primary separator of path components for the current platform.
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///
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/// For example, `/` on Unix and `\` on Windows.
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#[stable(feature = "rust1", since = "1.0.0")]
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pub const MAIN_SEPARATOR: char = crate::sys::path::MAIN_SEP;
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/// The primary separator of path components for the current platform.
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///
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/// For example, `/` on Unix and `\` on Windows.
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#[stable(feature = "main_separator_str", since = "1.68.0")]
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pub const MAIN_SEPARATOR_STR: &str = crate::sys::path::MAIN_SEP_STR;
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////////////////////////////////////////////////////////////////////////////////
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// Misc helpers
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////////////////////////////////////////////////////////////////////////////////
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// Iterate through `iter` while it matches `prefix`; return `None` if `prefix`
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// is not a prefix of `iter`, otherwise return `Some(iter_after_prefix)` giving
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// `iter` after having exhausted `prefix`.
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fn iter_after<'a, 'b, I, J>(mut iter: I, mut prefix: J) -> Option<I>
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where
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I: Iterator<Item = Component<'a>> + Clone,
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J: Iterator<Item = Component<'b>>,
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{
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loop {
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let mut iter_next = iter.clone();
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match (iter_next.next(), prefix.next()) {
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(Some(ref x), Some(ref y)) if x == y => (),
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(Some(_), Some(_)) => return None,
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(Some(_), None) => return Some(iter),
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(None, None) => return Some(iter),
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(None, Some(_)) => return None,
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}
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iter = iter_next;
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}
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}
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|
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// Detect scheme on Redox
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fn has_redox_scheme(s: &[u8]) -> bool {
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cfg!(target_os = "redox") && s.contains(&b':')
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}
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////////////////////////////////////////////////////////////////////////////////
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// Cross-platform, iterator-independent parsing
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////////////////////////////////////////////////////////////////////////////////
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/// Says whether the first byte after the prefix is a separator.
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fn has_physical_root(s: &[u8], prefix: Option<Prefix<'_>>) -> bool {
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let path = if let Some(p) = prefix { &s[p.len()..] } else { s };
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!path.is_empty() && is_sep_byte(path[0])
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}
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|
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// basic workhorse for splitting stem and extension
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fn rsplit_file_at_dot(file: &OsStr) -> (Option<&OsStr>, Option<&OsStr>) {
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if file.as_os_str_bytes() == b".." {
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return (Some(file), None);
|
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}
|
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|
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// The unsafety here stems from converting between &OsStr and &[u8]
|
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// and back. This is safe to do because (1) we only look at ASCII
|
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// contents of the encoding and (2) new &OsStr values are produced
|
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// only from ASCII-bounded slices of existing &OsStr values.
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let mut iter = file.as_os_str_bytes().rsplitn(2, |b| *b == b'.');
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let after = iter.next();
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let before = iter.next();
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if before == Some(b"") {
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(Some(file), None)
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} else {
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unsafe {
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(
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before.map(|s| OsStr::from_os_str_bytes_unchecked(s)),
|
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after.map(|s| OsStr::from_os_str_bytes_unchecked(s)),
|
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)
|
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}
|
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}
|
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}
|
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|
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fn split_file_at_dot(file: &OsStr) -> (&OsStr, Option<&OsStr>) {
|
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let slice = file.as_os_str_bytes();
|
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if slice == b".." {
|
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return (file, None);
|
||
}
|
||
|
||
// The unsafety here stems from converting between &OsStr and &[u8]
|
||
// and back. This is safe to do because (1) we only look at ASCII
|
||
// contents of the encoding and (2) new &OsStr values are produced
|
||
// only from ASCII-bounded slices of existing &OsStr values.
|
||
let i = match slice[1..].iter().position(|b| *b == b'.') {
|
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Some(i) => i + 1,
|
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None => return (file, None),
|
||
};
|
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let before = &slice[..i];
|
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let after = &slice[i + 1..];
|
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unsafe {
|
||
(
|
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OsStr::from_os_str_bytes_unchecked(before),
|
||
Some(OsStr::from_os_str_bytes_unchecked(after)),
|
||
)
|
||
}
|
||
}
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// The core iterators
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
|
||
/// Component parsing works by a double-ended state machine; the cursors at the
|
||
/// front and back of the path each keep track of what parts of the path have
|
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/// been consumed so far.
|
||
///
|
||
/// Going front to back, a path is made up of a prefix, a starting
|
||
/// directory component, and a body (of normal components)
|
||
#[derive(Copy, Clone, PartialEq, PartialOrd, Debug)]
|
||
enum State {
|
||
Prefix = 0, // c:
|
||
StartDir = 1, // / or . or nothing
|
||
Body = 2, // foo/bar/baz
|
||
Done = 3,
|
||
}
|
||
|
||
/// A structure wrapping a Windows path prefix as well as its unparsed string
|
||
/// representation.
|
||
///
|
||
/// In addition to the parsed [`Prefix`] information returned by [`kind`],
|
||
/// `PrefixComponent` also holds the raw and unparsed [`OsStr`] slice,
|
||
/// returned by [`as_os_str`].
|
||
///
|
||
/// Instances of this `struct` can be obtained by matching against the
|
||
/// [`Prefix` variant] on [`Component`].
|
||
///
|
||
/// Does not occur on Unix.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// # if cfg!(windows) {
|
||
/// use std::path::{Component, Path, Prefix};
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// let path = Path::new(r"c:\you\later\");
|
||
/// match path.components().next().unwrap() {
|
||
/// Component::Prefix(prefix_component) => {
|
||
/// assert_eq!(Prefix::Disk(b'C'), prefix_component.kind());
|
||
/// assert_eq!(OsStr::new("c:"), prefix_component.as_os_str());
|
||
/// }
|
||
/// _ => unreachable!(),
|
||
/// }
|
||
/// # }
|
||
/// ```
|
||
///
|
||
/// [`as_os_str`]: PrefixComponent::as_os_str
|
||
/// [`kind`]: PrefixComponent::kind
|
||
/// [`Prefix` variant]: Component::Prefix
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[derive(Copy, Clone, Eq, Debug)]
|
||
pub struct PrefixComponent<'a> {
|
||
/// The prefix as an unparsed `OsStr` slice.
|
||
raw: &'a OsStr,
|
||
|
||
/// The parsed prefix data.
|
||
parsed: Prefix<'a>,
|
||
}
|
||
|
||
impl<'a> PrefixComponent<'a> {
|
||
/// Returns the parsed prefix data.
|
||
///
|
||
/// See [`Prefix`]'s documentation for more information on the different
|
||
/// kinds of prefixes.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn kind(&self) -> Prefix<'a> {
|
||
self.parsed
|
||
}
|
||
|
||
/// Returns the raw [`OsStr`] slice for this prefix.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn as_os_str(&self) -> &'a OsStr {
|
||
self.raw
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> PartialEq for PrefixComponent<'a> {
|
||
#[inline]
|
||
fn eq(&self, other: &PrefixComponent<'a>) -> bool {
|
||
self.parsed == other.parsed
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> PartialOrd for PrefixComponent<'a> {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &PrefixComponent<'a>) -> Option<cmp::Ordering> {
|
||
PartialOrd::partial_cmp(&self.parsed, &other.parsed)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Ord for PrefixComponent<'_> {
|
||
#[inline]
|
||
fn cmp(&self, other: &Self) -> cmp::Ordering {
|
||
Ord::cmp(&self.parsed, &other.parsed)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Hash for PrefixComponent<'_> {
|
||
fn hash<H: Hasher>(&self, h: &mut H) {
|
||
self.parsed.hash(h);
|
||
}
|
||
}
|
||
|
||
/// A single component of a path.
|
||
///
|
||
/// A `Component` roughly corresponds to a substring between path separators
|
||
/// (`/` or `\`).
|
||
///
|
||
/// This `enum` is created by iterating over [`Components`], which in turn is
|
||
/// created by the [`components`](Path::components) method on [`Path`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```rust
|
||
/// use std::path::{Component, Path};
|
||
///
|
||
/// let path = Path::new("/tmp/foo/bar.txt");
|
||
/// let components = path.components().collect::<Vec<_>>();
|
||
/// assert_eq!(&components, &[
|
||
/// Component::RootDir,
|
||
/// Component::Normal("tmp".as_ref()),
|
||
/// Component::Normal("foo".as_ref()),
|
||
/// Component::Normal("bar.txt".as_ref()),
|
||
/// ]);
|
||
/// ```
|
||
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub enum Component<'a> {
|
||
/// A Windows path prefix, e.g., `C:` or `\\server\share`.
|
||
///
|
||
/// There is a large variety of prefix types, see [`Prefix`]'s documentation
|
||
/// for more.
|
||
///
|
||
/// Does not occur on Unix.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
Prefix(#[stable(feature = "rust1", since = "1.0.0")] PrefixComponent<'a>),
|
||
|
||
/// The root directory component, appears after any prefix and before anything else.
|
||
///
|
||
/// It represents a separator that designates that a path starts from root.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
RootDir,
|
||
|
||
/// A reference to the current directory, i.e., `.`.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
CurDir,
|
||
|
||
/// A reference to the parent directory, i.e., `..`.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
ParentDir,
|
||
|
||
/// A normal component, e.g., `a` and `b` in `a/b`.
|
||
///
|
||
/// This variant is the most common one, it represents references to files
|
||
/// or directories.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
Normal(#[stable(feature = "rust1", since = "1.0.0")] &'a OsStr),
|
||
}
|
||
|
||
impl<'a> Component<'a> {
|
||
/// Extracts the underlying [`OsStr`] slice.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("./tmp/foo/bar.txt");
|
||
/// let components: Vec<_> = path.components().map(|comp| comp.as_os_str()).collect();
|
||
/// assert_eq!(&components, &[".", "tmp", "foo", "bar.txt"]);
|
||
/// ```
|
||
#[must_use = "`self` will be dropped if the result is not used"]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn as_os_str(self) -> &'a OsStr {
|
||
match self {
|
||
Component::Prefix(p) => p.as_os_str(),
|
||
Component::RootDir => OsStr::new(MAIN_SEP_STR),
|
||
Component::CurDir => OsStr::new("."),
|
||
Component::ParentDir => OsStr::new(".."),
|
||
Component::Normal(path) => path,
|
||
}
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for Component<'_> {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
self.as_os_str()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_component_asref", since = "1.25.0")]
|
||
impl AsRef<Path> for Component<'_> {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
self.as_os_str().as_ref()
|
||
}
|
||
}
|
||
|
||
/// An iterator over the [`Component`]s of a [`Path`].
|
||
///
|
||
/// This `struct` is created by the [`components`] method on [`Path`].
|
||
/// See its documentation for more.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/tmp/foo/bar.txt");
|
||
///
|
||
/// for component in path.components() {
|
||
/// println!("{component:?}");
|
||
/// }
|
||
/// ```
|
||
///
|
||
/// [`components`]: Path::components
|
||
#[derive(Clone)]
|
||
#[must_use = "iterators are lazy and do nothing unless consumed"]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub struct Components<'a> {
|
||
// The path left to parse components from
|
||
path: &'a [u8],
|
||
|
||
// The prefix as it was originally parsed, if any
|
||
prefix: Option<Prefix<'a>>,
|
||
|
||
// true if path *physically* has a root separator; for most Windows
|
||
// prefixes, it may have a "logical" root separator for the purposes of
|
||
// normalization, e.g., \\server\share == \\server\share\.
|
||
has_physical_root: bool,
|
||
|
||
// The iterator is double-ended, and these two states keep track of what has
|
||
// been produced from either end
|
||
front: State,
|
||
back: State,
|
||
}
|
||
|
||
/// An iterator over the [`Component`]s of a [`Path`], as [`OsStr`] slices.
|
||
///
|
||
/// This `struct` is created by the [`iter`] method on [`Path`].
|
||
/// See its documentation for more.
|
||
///
|
||
/// [`iter`]: Path::iter
|
||
#[derive(Clone)]
|
||
#[must_use = "iterators are lazy and do nothing unless consumed"]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub struct Iter<'a> {
|
||
inner: Components<'a>,
|
||
}
|
||
|
||
#[stable(feature = "path_components_debug", since = "1.13.0")]
|
||
impl fmt::Debug for Components<'_> {
|
||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
struct DebugHelper<'a>(&'a Path);
|
||
|
||
impl fmt::Debug for DebugHelper<'_> {
|
||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
f.debug_list().entries(self.0.components()).finish()
|
||
}
|
||
}
|
||
|
||
f.debug_tuple("Components").field(&DebugHelper(self.as_path())).finish()
|
||
}
|
||
}
|
||
|
||
impl<'a> Components<'a> {
|
||
// how long is the prefix, if any?
|
||
#[inline]
|
||
fn prefix_len(&self) -> usize {
|
||
self.prefix.as_ref().map(Prefix::len).unwrap_or(0)
|
||
}
|
||
|
||
#[inline]
|
||
fn prefix_verbatim(&self) -> bool {
|
||
self.prefix.as_ref().map(Prefix::is_verbatim).unwrap_or(false)
|
||
}
|
||
|
||
/// how much of the prefix is left from the point of view of iteration?
|
||
#[inline]
|
||
fn prefix_remaining(&self) -> usize {
|
||
if self.front == State::Prefix { self.prefix_len() } else { 0 }
|
||
}
|
||
|
||
// Given the iteration so far, how much of the pre-State::Body path is left?
|
||
#[inline]
|
||
fn len_before_body(&self) -> usize {
|
||
let root = if self.front <= State::StartDir && self.has_physical_root { 1 } else { 0 };
|
||
let cur_dir = if self.front <= State::StartDir && self.include_cur_dir() { 1 } else { 0 };
|
||
self.prefix_remaining() + root + cur_dir
|
||
}
|
||
|
||
// is the iteration complete?
|
||
#[inline]
|
||
fn finished(&self) -> bool {
|
||
self.front == State::Done || self.back == State::Done || self.front > self.back
|
||
}
|
||
|
||
#[inline]
|
||
fn is_sep_byte(&self, b: u8) -> bool {
|
||
if self.prefix_verbatim() { is_verbatim_sep(b) } else { is_sep_byte(b) }
|
||
}
|
||
|
||
/// Extracts a slice corresponding to the portion of the path remaining for iteration.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let mut components = Path::new("/tmp/foo/bar.txt").components();
|
||
/// components.next();
|
||
/// components.next();
|
||
///
|
||
/// assert_eq!(Path::new("foo/bar.txt"), components.as_path());
|
||
/// ```
|
||
#[must_use]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn as_path(&self) -> &'a Path {
|
||
let mut comps = self.clone();
|
||
if comps.front == State::Body {
|
||
comps.trim_left();
|
||
}
|
||
if comps.back == State::Body {
|
||
comps.trim_right();
|
||
}
|
||
unsafe { Path::from_u8_slice(comps.path) }
|
||
}
|
||
|
||
/// Is the *original* path rooted?
|
||
fn has_root(&self) -> bool {
|
||
if self.has_physical_root {
|
||
return true;
|
||
}
|
||
if let Some(p) = self.prefix {
|
||
if p.has_implicit_root() {
|
||
return true;
|
||
}
|
||
}
|
||
false
|
||
}
|
||
|
||
/// Should the normalized path include a leading . ?
|
||
fn include_cur_dir(&self) -> bool {
|
||
if self.has_root() {
|
||
return false;
|
||
}
|
||
let mut iter = self.path[self.prefix_remaining()..].iter();
|
||
match (iter.next(), iter.next()) {
|
||
(Some(&b'.'), None) => true,
|
||
(Some(&b'.'), Some(&b)) => self.is_sep_byte(b),
|
||
_ => false,
|
||
}
|
||
}
|
||
|
||
// parse a given byte sequence following the OsStr encoding into the
|
||
// corresponding path component
|
||
unsafe fn parse_single_component<'b>(&self, comp: &'b [u8]) -> Option<Component<'b>> {
|
||
match comp {
|
||
b"." if self.prefix_verbatim() => Some(Component::CurDir),
|
||
b"." => None, // . components are normalized away, except at
|
||
// the beginning of a path, which is treated
|
||
// separately via `include_cur_dir`
|
||
b".." => Some(Component::ParentDir),
|
||
b"" => None,
|
||
_ => Some(Component::Normal(unsafe { OsStr::from_os_str_bytes_unchecked(comp) })),
|
||
}
|
||
}
|
||
|
||
// parse a component from the left, saying how many bytes to consume to
|
||
// remove the component
|
||
fn parse_next_component(&self) -> (usize, Option<Component<'a>>) {
|
||
debug_assert!(self.front == State::Body);
|
||
let (extra, comp) = match self.path.iter().position(|b| self.is_sep_byte(*b)) {
|
||
None => (0, self.path),
|
||
Some(i) => (1, &self.path[..i]),
|
||
};
|
||
// SAFETY: `comp` is a valid substring, since it is split on a separator.
|
||
(comp.len() + extra, unsafe { self.parse_single_component(comp) })
|
||
}
|
||
|
||
// parse a component from the right, saying how many bytes to consume to
|
||
// remove the component
|
||
fn parse_next_component_back(&self) -> (usize, Option<Component<'a>>) {
|
||
debug_assert!(self.back == State::Body);
|
||
let start = self.len_before_body();
|
||
let (extra, comp) = match self.path[start..].iter().rposition(|b| self.is_sep_byte(*b)) {
|
||
None => (0, &self.path[start..]),
|
||
Some(i) => (1, &self.path[start + i + 1..]),
|
||
};
|
||
// SAFETY: `comp` is a valid substring, since it is split on a separator.
|
||
(comp.len() + extra, unsafe { self.parse_single_component(comp) })
|
||
}
|
||
|
||
// trim away repeated separators (i.e., empty components) on the left
|
||
fn trim_left(&mut self) {
|
||
while !self.path.is_empty() {
|
||
let (size, comp) = self.parse_next_component();
|
||
if comp.is_some() {
|
||
return;
|
||
} else {
|
||
self.path = &self.path[size..];
|
||
}
|
||
}
|
||
}
|
||
|
||
// trim away repeated separators (i.e., empty components) on the right
|
||
fn trim_right(&mut self) {
|
||
while self.path.len() > self.len_before_body() {
|
||
let (size, comp) = self.parse_next_component_back();
|
||
if comp.is_some() {
|
||
return;
|
||
} else {
|
||
self.path = &self.path[..self.path.len() - size];
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for Components<'_> {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
self.as_path()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for Components<'_> {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
self.as_path().as_os_str()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_iter_debug", since = "1.13.0")]
|
||
impl fmt::Debug for Iter<'_> {
|
||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
struct DebugHelper<'a>(&'a Path);
|
||
|
||
impl fmt::Debug for DebugHelper<'_> {
|
||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
f.debug_list().entries(self.0.iter()).finish()
|
||
}
|
||
}
|
||
|
||
f.debug_tuple("Iter").field(&DebugHelper(self.as_path())).finish()
|
||
}
|
||
}
|
||
|
||
impl<'a> Iter<'a> {
|
||
/// Extracts a slice corresponding to the portion of the path remaining for iteration.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let mut iter = Path::new("/tmp/foo/bar.txt").iter();
|
||
/// iter.next();
|
||
/// iter.next();
|
||
///
|
||
/// assert_eq!(Path::new("foo/bar.txt"), iter.as_path());
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn as_path(&self) -> &'a Path {
|
||
self.inner.as_path()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for Iter<'_> {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
self.as_path()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for Iter<'_> {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
self.as_path().as_os_str()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> Iterator for Iter<'a> {
|
||
type Item = &'a OsStr;
|
||
|
||
#[inline]
|
||
fn next(&mut self) -> Option<&'a OsStr> {
|
||
self.inner.next().map(Component::as_os_str)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> DoubleEndedIterator for Iter<'a> {
|
||
#[inline]
|
||
fn next_back(&mut self) -> Option<&'a OsStr> {
|
||
self.inner.next_back().map(Component::as_os_str)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "fused", since = "1.26.0")]
|
||
impl FusedIterator for Iter<'_> {}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> Iterator for Components<'a> {
|
||
type Item = Component<'a>;
|
||
|
||
fn next(&mut self) -> Option<Component<'a>> {
|
||
while !self.finished() {
|
||
match self.front {
|
||
State::Prefix if self.prefix_len() > 0 => {
|
||
self.front = State::StartDir;
|
||
debug_assert!(self.prefix_len() <= self.path.len());
|
||
let raw = &self.path[..self.prefix_len()];
|
||
self.path = &self.path[self.prefix_len()..];
|
||
return Some(Component::Prefix(PrefixComponent {
|
||
raw: unsafe { OsStr::from_os_str_bytes_unchecked(raw) },
|
||
parsed: self.prefix.unwrap(),
|
||
}));
|
||
}
|
||
State::Prefix => {
|
||
self.front = State::StartDir;
|
||
}
|
||
State::StartDir => {
|
||
self.front = State::Body;
|
||
if self.has_physical_root {
|
||
debug_assert!(!self.path.is_empty());
|
||
self.path = &self.path[1..];
|
||
return Some(Component::RootDir);
|
||
} else if let Some(p) = self.prefix {
|
||
if p.has_implicit_root() && !p.is_verbatim() {
|
||
return Some(Component::RootDir);
|
||
}
|
||
} else if self.include_cur_dir() {
|
||
debug_assert!(!self.path.is_empty());
|
||
self.path = &self.path[1..];
|
||
return Some(Component::CurDir);
|
||
}
|
||
}
|
||
State::Body if !self.path.is_empty() => {
|
||
let (size, comp) = self.parse_next_component();
|
||
self.path = &self.path[size..];
|
||
if comp.is_some() {
|
||
return comp;
|
||
}
|
||
}
|
||
State::Body => {
|
||
self.front = State::Done;
|
||
}
|
||
State::Done => unreachable!(),
|
||
}
|
||
}
|
||
None
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> DoubleEndedIterator for Components<'a> {
|
||
fn next_back(&mut self) -> Option<Component<'a>> {
|
||
while !self.finished() {
|
||
match self.back {
|
||
State::Body if self.path.len() > self.len_before_body() => {
|
||
let (size, comp) = self.parse_next_component_back();
|
||
self.path = &self.path[..self.path.len() - size];
|
||
if comp.is_some() {
|
||
return comp;
|
||
}
|
||
}
|
||
State::Body => {
|
||
self.back = State::StartDir;
|
||
}
|
||
State::StartDir => {
|
||
self.back = State::Prefix;
|
||
if self.has_physical_root {
|
||
self.path = &self.path[..self.path.len() - 1];
|
||
return Some(Component::RootDir);
|
||
} else if let Some(p) = self.prefix {
|
||
if p.has_implicit_root() && !p.is_verbatim() {
|
||
return Some(Component::RootDir);
|
||
}
|
||
} else if self.include_cur_dir() {
|
||
self.path = &self.path[..self.path.len() - 1];
|
||
return Some(Component::CurDir);
|
||
}
|
||
}
|
||
State::Prefix if self.prefix_len() > 0 => {
|
||
self.back = State::Done;
|
||
return Some(Component::Prefix(PrefixComponent {
|
||
raw: unsafe { OsStr::from_os_str_bytes_unchecked(self.path) },
|
||
parsed: self.prefix.unwrap(),
|
||
}));
|
||
}
|
||
State::Prefix => {
|
||
self.back = State::Done;
|
||
return None;
|
||
}
|
||
State::Done => unreachable!(),
|
||
}
|
||
}
|
||
None
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "fused", since = "1.26.0")]
|
||
impl FusedIterator for Components<'_> {}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> PartialEq for Components<'a> {
|
||
#[inline]
|
||
fn eq(&self, other: &Components<'a>) -> bool {
|
||
let Components { path: _, front: _, back: _, has_physical_root: _, prefix: _ } = self;
|
||
|
||
// Fast path for exact matches, e.g. for hashmap lookups.
|
||
// Don't explicitly compare the prefix or has_physical_root fields since they'll
|
||
// either be covered by the `path` buffer or are only relevant for `prefix_verbatim()`.
|
||
if self.path.len() == other.path.len()
|
||
&& self.front == other.front
|
||
&& self.back == State::Body
|
||
&& other.back == State::Body
|
||
&& self.prefix_verbatim() == other.prefix_verbatim()
|
||
{
|
||
// possible future improvement: this could bail out earlier if there were a
|
||
// reverse memcmp/bcmp comparing back to front
|
||
if self.path == other.path {
|
||
return true;
|
||
}
|
||
}
|
||
|
||
// compare back to front since absolute paths often share long prefixes
|
||
Iterator::eq(self.clone().rev(), other.clone().rev())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Eq for Components<'_> {}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<'a> PartialOrd for Components<'a> {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &Components<'a>) -> Option<cmp::Ordering> {
|
||
Some(compare_components(self.clone(), other.clone()))
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Ord for Components<'_> {
|
||
#[inline]
|
||
fn cmp(&self, other: &Self) -> cmp::Ordering {
|
||
compare_components(self.clone(), other.clone())
|
||
}
|
||
}
|
||
|
||
fn compare_components(mut left: Components<'_>, mut right: Components<'_>) -> cmp::Ordering {
|
||
// Fast path for long shared prefixes
|
||
//
|
||
// - compare raw bytes to find first mismatch
|
||
// - backtrack to find separator before mismatch to avoid ambiguous parsings of '.' or '..' characters
|
||
// - if found update state to only do a component-wise comparison on the remainder,
|
||
// otherwise do it on the full path
|
||
//
|
||
// The fast path isn't taken for paths with a PrefixComponent to avoid backtracking into
|
||
// the middle of one
|
||
if left.prefix.is_none() && right.prefix.is_none() && left.front == right.front {
|
||
// possible future improvement: a [u8]::first_mismatch simd implementation
|
||
let first_difference = match left.path.iter().zip(right.path).position(|(&a, &b)| a != b) {
|
||
None if left.path.len() == right.path.len() => return cmp::Ordering::Equal,
|
||
None => left.path.len().min(right.path.len()),
|
||
Some(diff) => diff,
|
||
};
|
||
|
||
if let Some(previous_sep) =
|
||
left.path[..first_difference].iter().rposition(|&b| left.is_sep_byte(b))
|
||
{
|
||
let mismatched_component_start = previous_sep + 1;
|
||
left.path = &left.path[mismatched_component_start..];
|
||
left.front = State::Body;
|
||
right.path = &right.path[mismatched_component_start..];
|
||
right.front = State::Body;
|
||
}
|
||
}
|
||
|
||
Iterator::cmp(left, right)
|
||
}
|
||
|
||
/// An iterator over [`Path`] and its ancestors.
|
||
///
|
||
/// This `struct` is created by the [`ancestors`] method on [`Path`].
|
||
/// See its documentation for more.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/foo/bar");
|
||
///
|
||
/// for ancestor in path.ancestors() {
|
||
/// println!("{}", ancestor.display());
|
||
/// }
|
||
/// ```
|
||
///
|
||
/// [`ancestors`]: Path::ancestors
|
||
#[derive(Copy, Clone, Debug)]
|
||
#[must_use = "iterators are lazy and do nothing unless consumed"]
|
||
#[stable(feature = "path_ancestors", since = "1.28.0")]
|
||
pub struct Ancestors<'a> {
|
||
next: Option<&'a Path>,
|
||
}
|
||
|
||
#[stable(feature = "path_ancestors", since = "1.28.0")]
|
||
impl<'a> Iterator for Ancestors<'a> {
|
||
type Item = &'a Path;
|
||
|
||
#[inline]
|
||
fn next(&mut self) -> Option<Self::Item> {
|
||
let next = self.next;
|
||
self.next = next.and_then(Path::parent);
|
||
next
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_ancestors", since = "1.28.0")]
|
||
impl FusedIterator for Ancestors<'_> {}
|
||
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
// Basic types and traits
|
||
////////////////////////////////////////////////////////////////////////////////
|
||
|
||
/// An owned, mutable path (akin to [`String`]).
|
||
///
|
||
/// This type provides methods like [`push`] and [`set_extension`] that mutate
|
||
/// the path in place. It also implements [`Deref`] to [`Path`], meaning that
|
||
/// all methods on [`Path`] slices are available on `PathBuf` values as well.
|
||
///
|
||
/// [`push`]: PathBuf::push
|
||
/// [`set_extension`]: PathBuf::set_extension
|
||
///
|
||
/// More details about the overall approach can be found in
|
||
/// the [module documentation](self).
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// You can use [`push`] to build up a `PathBuf` from
|
||
/// components:
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let mut path = PathBuf::new();
|
||
///
|
||
/// path.push(r"C:\");
|
||
/// path.push("windows");
|
||
/// path.push("system32");
|
||
///
|
||
/// path.set_extension("dll");
|
||
/// ```
|
||
///
|
||
/// However, [`push`] is best used for dynamic situations. This is a better way
|
||
/// to do this when you know all of the components ahead of time:
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let path: PathBuf = [r"C:\", "windows", "system32.dll"].iter().collect();
|
||
/// ```
|
||
///
|
||
/// We can still do better than this! Since these are all strings, we can use
|
||
/// `From::from`:
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let path = PathBuf::from(r"C:\windows\system32.dll");
|
||
/// ```
|
||
///
|
||
/// Which method works best depends on what kind of situation you're in.
|
||
#[cfg_attr(not(test), rustc_diagnostic_item = "PathBuf")]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
// FIXME:
|
||
// `PathBuf::as_mut_vec` current implementation relies
|
||
// on `PathBuf` being layout-compatible with `Vec<u8>`.
|
||
// When attribute privacy is implemented, `PathBuf` should be annotated as `#[repr(transparent)]`.
|
||
// Anyway, `PathBuf` representation and layout are considered implementation detail, are
|
||
// not documented and must not be relied upon.
|
||
pub struct PathBuf {
|
||
inner: OsString,
|
||
}
|
||
|
||
impl PathBuf {
|
||
#[inline]
|
||
fn as_mut_vec(&mut self) -> &mut Vec<u8> {
|
||
unsafe { &mut *(self as *mut PathBuf as *mut Vec<u8>) }
|
||
}
|
||
|
||
/// Allocates an empty `PathBuf`.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let path = PathBuf::new();
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn new() -> PathBuf {
|
||
PathBuf { inner: OsString::new() }
|
||
}
|
||
|
||
/// Creates a new `PathBuf` with a given capacity used to create the
|
||
/// internal [`OsString`]. See [`with_capacity`] defined on [`OsString`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let mut path = PathBuf::with_capacity(10);
|
||
/// let capacity = path.capacity();
|
||
///
|
||
/// // This push is done without reallocating
|
||
/// path.push(r"C:\");
|
||
///
|
||
/// assert_eq!(capacity, path.capacity());
|
||
/// ```
|
||
///
|
||
/// [`with_capacity`]: OsString::with_capacity
|
||
#[stable(feature = "path_buf_capacity", since = "1.44.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn with_capacity(capacity: usize) -> PathBuf {
|
||
PathBuf { inner: OsString::with_capacity(capacity) }
|
||
}
|
||
|
||
/// Coerces to a [`Path`] slice.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let p = PathBuf::from("/test");
|
||
/// assert_eq!(Path::new("/test"), p.as_path());
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn as_path(&self) -> &Path {
|
||
self
|
||
}
|
||
|
||
/// Extends `self` with `path`.
|
||
///
|
||
/// If `path` is absolute, it replaces the current path.
|
||
///
|
||
/// On Windows:
|
||
///
|
||
/// * if `path` has a root but no prefix (e.g., `\windows`), it
|
||
/// replaces everything except for the prefix (if any) of `self`.
|
||
/// * if `path` has a prefix but no root, it replaces `self`.
|
||
/// * if `self` has a verbatim prefix (e.g. `\\?\C:\windows`)
|
||
/// and `path` is not empty, the new path is normalized: all references
|
||
/// to `.` and `..` are removed.
|
||
///
|
||
/// Consider using [`Path::join`] if you need a new `PathBuf` instead of
|
||
/// using this function on a cloned `PathBuf`.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// Pushing a relative path extends the existing path:
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let mut path = PathBuf::from("/tmp");
|
||
/// path.push("file.bk");
|
||
/// assert_eq!(path, PathBuf::from("/tmp/file.bk"));
|
||
/// ```
|
||
///
|
||
/// Pushing an absolute path replaces the existing path:
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let mut path = PathBuf::from("/tmp");
|
||
/// path.push("/etc");
|
||
/// assert_eq!(path, PathBuf::from("/etc"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn push<P: AsRef<Path>>(&mut self, path: P) {
|
||
self._push(path.as_ref())
|
||
}
|
||
|
||
fn _push(&mut self, path: &Path) {
|
||
// in general, a separator is needed if the rightmost byte is not a separator
|
||
let mut need_sep = self.as_mut_vec().last().map(|c| !is_sep_byte(*c)).unwrap_or(false);
|
||
|
||
// in the special case of `C:` on Windows, do *not* add a separator
|
||
let comps = self.components();
|
||
|
||
if comps.prefix_len() > 0
|
||
&& comps.prefix_len() == comps.path.len()
|
||
&& comps.prefix.unwrap().is_drive()
|
||
{
|
||
need_sep = false
|
||
}
|
||
|
||
// absolute `path` replaces `self`
|
||
if path.is_absolute() || path.prefix().is_some() {
|
||
self.as_mut_vec().truncate(0);
|
||
|
||
// verbatim paths need . and .. removed
|
||
} else if comps.prefix_verbatim() && !path.inner.is_empty() {
|
||
let mut buf: Vec<_> = comps.collect();
|
||
for c in path.components() {
|
||
match c {
|
||
Component::RootDir => {
|
||
buf.truncate(1);
|
||
buf.push(c);
|
||
}
|
||
Component::CurDir => (),
|
||
Component::ParentDir => {
|
||
if let Some(Component::Normal(_)) = buf.last() {
|
||
buf.pop();
|
||
}
|
||
}
|
||
_ => buf.push(c),
|
||
}
|
||
}
|
||
|
||
let mut res = OsString::new();
|
||
let mut need_sep = false;
|
||
|
||
for c in buf {
|
||
if need_sep && c != Component::RootDir {
|
||
res.push(MAIN_SEP_STR);
|
||
}
|
||
res.push(c.as_os_str());
|
||
|
||
need_sep = match c {
|
||
Component::RootDir => false,
|
||
Component::Prefix(prefix) => {
|
||
!prefix.parsed.is_drive() && prefix.parsed.len() > 0
|
||
}
|
||
_ => true,
|
||
}
|
||
}
|
||
|
||
self.inner = res;
|
||
return;
|
||
|
||
// `path` has a root but no prefix, e.g., `\windows` (Windows only)
|
||
} else if path.has_root() {
|
||
let prefix_len = self.components().prefix_remaining();
|
||
self.as_mut_vec().truncate(prefix_len);
|
||
|
||
// `path` is a pure relative path
|
||
} else if need_sep {
|
||
self.inner.push(MAIN_SEP_STR);
|
||
}
|
||
|
||
self.inner.push(path);
|
||
}
|
||
|
||
/// Truncates `self` to [`self.parent`].
|
||
///
|
||
/// Returns `false` and does nothing if [`self.parent`] is [`None`].
|
||
/// Otherwise, returns `true`.
|
||
///
|
||
/// [`self.parent`]: Path::parent
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let mut p = PathBuf::from("/spirited/away.rs");
|
||
///
|
||
/// p.pop();
|
||
/// assert_eq!(Path::new("/spirited"), p);
|
||
/// p.pop();
|
||
/// assert_eq!(Path::new("/"), p);
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn pop(&mut self) -> bool {
|
||
match self.parent().map(|p| p.as_u8_slice().len()) {
|
||
Some(len) => {
|
||
self.as_mut_vec().truncate(len);
|
||
true
|
||
}
|
||
None => false,
|
||
}
|
||
}
|
||
|
||
/// Updates [`self.file_name`] to `file_name`.
|
||
///
|
||
/// If [`self.file_name`] was [`None`], this is equivalent to pushing
|
||
/// `file_name`.
|
||
///
|
||
/// Otherwise it is equivalent to calling [`pop`] and then pushing
|
||
/// `file_name`. The new path will be a sibling of the original path.
|
||
/// (That is, it will have the same parent.)
|
||
///
|
||
/// [`self.file_name`]: Path::file_name
|
||
/// [`pop`]: PathBuf::pop
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let mut buf = PathBuf::from("/");
|
||
/// assert!(buf.file_name() == None);
|
||
///
|
||
/// buf.set_file_name("foo.txt");
|
||
/// assert!(buf == PathBuf::from("/foo.txt"));
|
||
/// assert!(buf.file_name().is_some());
|
||
///
|
||
/// buf.set_file_name("bar.txt");
|
||
/// assert!(buf == PathBuf::from("/bar.txt"));
|
||
///
|
||
/// buf.set_file_name("baz");
|
||
/// assert!(buf == PathBuf::from("/baz"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn set_file_name<S: AsRef<OsStr>>(&mut self, file_name: S) {
|
||
self._set_file_name(file_name.as_ref())
|
||
}
|
||
|
||
fn _set_file_name(&mut self, file_name: &OsStr) {
|
||
if self.file_name().is_some() {
|
||
let popped = self.pop();
|
||
debug_assert!(popped);
|
||
}
|
||
self.push(file_name);
|
||
}
|
||
|
||
/// Updates [`self.extension`] to `Some(extension)` or to `None` if
|
||
/// `extension` is empty.
|
||
///
|
||
/// Returns `false` and does nothing if [`self.file_name`] is [`None`],
|
||
/// returns `true` and updates the extension otherwise.
|
||
///
|
||
/// If [`self.extension`] is [`None`], the extension is added; otherwise
|
||
/// it is replaced.
|
||
///
|
||
/// If `extension` is the empty string, [`self.extension`] will be [`None`]
|
||
/// afterwards, not `Some("")`.
|
||
///
|
||
/// # Caveats
|
||
///
|
||
/// The new `extension` may contain dots and will be used in its entirety,
|
||
/// but only the part after the final dot will be reflected in
|
||
/// [`self.extension`].
|
||
///
|
||
/// If the file stem contains internal dots and `extension` is empty, part
|
||
/// of the old file stem will be considered the new [`self.extension`].
|
||
///
|
||
/// See the examples below.
|
||
///
|
||
/// [`self.file_name`]: Path::file_name
|
||
/// [`self.extension`]: Path::extension
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let mut p = PathBuf::from("/feel/the");
|
||
///
|
||
/// p.set_extension("force");
|
||
/// assert_eq!(Path::new("/feel/the.force"), p.as_path());
|
||
///
|
||
/// p.set_extension("dark.side");
|
||
/// assert_eq!(Path::new("/feel/the.dark.side"), p.as_path());
|
||
///
|
||
/// p.set_extension("cookie");
|
||
/// assert_eq!(Path::new("/feel/the.dark.cookie"), p.as_path());
|
||
///
|
||
/// p.set_extension("");
|
||
/// assert_eq!(Path::new("/feel/the.dark"), p.as_path());
|
||
///
|
||
/// p.set_extension("");
|
||
/// assert_eq!(Path::new("/feel/the"), p.as_path());
|
||
///
|
||
/// p.set_extension("");
|
||
/// assert_eq!(Path::new("/feel/the"), p.as_path());
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn set_extension<S: AsRef<OsStr>>(&mut self, extension: S) -> bool {
|
||
self._set_extension(extension.as_ref())
|
||
}
|
||
|
||
fn _set_extension(&mut self, extension: &OsStr) -> bool {
|
||
let file_stem = match self.file_stem() {
|
||
None => return false,
|
||
Some(f) => f.as_os_str_bytes(),
|
||
};
|
||
|
||
// truncate until right after the file stem
|
||
let end_file_stem = file_stem[file_stem.len()..].as_ptr().addr();
|
||
let start = self.inner.as_os_str_bytes().as_ptr().addr();
|
||
let v = self.as_mut_vec();
|
||
v.truncate(end_file_stem.wrapping_sub(start));
|
||
|
||
// add the new extension, if any
|
||
let new = extension.as_os_str_bytes();
|
||
if !new.is_empty() {
|
||
v.reserve_exact(new.len() + 1);
|
||
v.push(b'.');
|
||
v.extend_from_slice(new);
|
||
}
|
||
|
||
true
|
||
}
|
||
|
||
/// Yields a mutable reference to the underlying [`OsString`] instance.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let mut path = PathBuf::from("/foo");
|
||
///
|
||
/// path.push("bar");
|
||
/// assert_eq!(path, Path::new("/foo/bar"));
|
||
///
|
||
/// // OsString's `push` does not add a separator.
|
||
/// path.as_mut_os_string().push("baz");
|
||
/// assert_eq!(path, Path::new("/foo/barbaz"));
|
||
/// ```
|
||
#[stable(feature = "path_as_mut_os_str", since = "1.70.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn as_mut_os_string(&mut self) -> &mut OsString {
|
||
&mut self.inner
|
||
}
|
||
|
||
/// Consumes the `PathBuf`, yielding its internal [`OsString`] storage.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::PathBuf;
|
||
///
|
||
/// let p = PathBuf::from("/the/head");
|
||
/// let os_str = p.into_os_string();
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use = "`self` will be dropped if the result is not used"]
|
||
#[inline]
|
||
pub fn into_os_string(self) -> OsString {
|
||
self.inner
|
||
}
|
||
|
||
/// Converts this `PathBuf` into a [boxed](Box) [`Path`].
|
||
#[stable(feature = "into_boxed_path", since = "1.20.0")]
|
||
#[must_use = "`self` will be dropped if the result is not used"]
|
||
#[inline]
|
||
pub fn into_boxed_path(self) -> Box<Path> {
|
||
let rw = Box::into_raw(self.inner.into_boxed_os_str()) as *mut Path;
|
||
unsafe { Box::from_raw(rw) }
|
||
}
|
||
|
||
/// Invokes [`capacity`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`capacity`]: OsString::capacity
|
||
#[stable(feature = "path_buf_capacity", since = "1.44.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn capacity(&self) -> usize {
|
||
self.inner.capacity()
|
||
}
|
||
|
||
/// Invokes [`clear`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`clear`]: OsString::clear
|
||
#[stable(feature = "path_buf_capacity", since = "1.44.0")]
|
||
#[inline]
|
||
pub fn clear(&mut self) {
|
||
self.inner.clear()
|
||
}
|
||
|
||
/// Invokes [`reserve`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`reserve`]: OsString::reserve
|
||
#[stable(feature = "path_buf_capacity", since = "1.44.0")]
|
||
#[inline]
|
||
pub fn reserve(&mut self, additional: usize) {
|
||
self.inner.reserve(additional)
|
||
}
|
||
|
||
/// Invokes [`try_reserve`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`try_reserve`]: OsString::try_reserve
|
||
#[stable(feature = "try_reserve_2", since = "1.63.0")]
|
||
#[inline]
|
||
pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
|
||
self.inner.try_reserve(additional)
|
||
}
|
||
|
||
/// Invokes [`reserve_exact`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`reserve_exact`]: OsString::reserve_exact
|
||
#[stable(feature = "path_buf_capacity", since = "1.44.0")]
|
||
#[inline]
|
||
pub fn reserve_exact(&mut self, additional: usize) {
|
||
self.inner.reserve_exact(additional)
|
||
}
|
||
|
||
/// Invokes [`try_reserve_exact`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`try_reserve_exact`]: OsString::try_reserve_exact
|
||
#[stable(feature = "try_reserve_2", since = "1.63.0")]
|
||
#[inline]
|
||
pub fn try_reserve_exact(&mut self, additional: usize) -> Result<(), TryReserveError> {
|
||
self.inner.try_reserve_exact(additional)
|
||
}
|
||
|
||
/// Invokes [`shrink_to_fit`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`shrink_to_fit`]: OsString::shrink_to_fit
|
||
#[stable(feature = "path_buf_capacity", since = "1.44.0")]
|
||
#[inline]
|
||
pub fn shrink_to_fit(&mut self) {
|
||
self.inner.shrink_to_fit()
|
||
}
|
||
|
||
/// Invokes [`shrink_to`] on the underlying instance of [`OsString`].
|
||
///
|
||
/// [`shrink_to`]: OsString::shrink_to
|
||
#[stable(feature = "shrink_to", since = "1.56.0")]
|
||
#[inline]
|
||
pub fn shrink_to(&mut self, min_capacity: usize) {
|
||
self.inner.shrink_to(min_capacity)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Clone for PathBuf {
|
||
#[inline]
|
||
fn clone(&self) -> Self {
|
||
PathBuf { inner: self.inner.clone() }
|
||
}
|
||
|
||
#[inline]
|
||
fn clone_from(&mut self, source: &Self) {
|
||
self.inner.clone_from(&source.inner)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "box_from_path", since = "1.17.0")]
|
||
impl From<&Path> for Box<Path> {
|
||
/// Creates a boxed [`Path`] from a reference.
|
||
///
|
||
/// This will allocate and clone `path` to it.
|
||
fn from(path: &Path) -> Box<Path> {
|
||
let boxed: Box<OsStr> = path.inner.into();
|
||
let rw = Box::into_raw(boxed) as *mut Path;
|
||
unsafe { Box::from_raw(rw) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "box_from_cow", since = "1.45.0")]
|
||
impl From<Cow<'_, Path>> for Box<Path> {
|
||
/// Creates a boxed [`Path`] from a clone-on-write pointer.
|
||
///
|
||
/// Converting from a `Cow::Owned` does not clone or allocate.
|
||
#[inline]
|
||
fn from(cow: Cow<'_, Path>) -> Box<Path> {
|
||
match cow {
|
||
Cow::Borrowed(path) => Box::from(path),
|
||
Cow::Owned(path) => Box::from(path),
|
||
}
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_buf_from_box", since = "1.18.0")]
|
||
impl From<Box<Path>> for PathBuf {
|
||
/// Converts a <code>[Box]<[Path]></code> into a [`PathBuf`].
|
||
///
|
||
/// This conversion does not allocate or copy memory.
|
||
#[inline]
|
||
fn from(boxed: Box<Path>) -> PathBuf {
|
||
boxed.into_path_buf()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "box_from_path_buf", since = "1.20.0")]
|
||
impl From<PathBuf> for Box<Path> {
|
||
/// Converts a [`PathBuf`] into a <code>[Box]<[Path]></code>.
|
||
///
|
||
/// This conversion currently should not allocate memory,
|
||
/// but this behavior is not guaranteed on all platforms or in all future versions.
|
||
#[inline]
|
||
fn from(p: PathBuf) -> Box<Path> {
|
||
p.into_boxed_path()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "more_box_slice_clone", since = "1.29.0")]
|
||
impl Clone for Box<Path> {
|
||
#[inline]
|
||
fn clone(&self) -> Self {
|
||
self.to_path_buf().into_boxed_path()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<T: ?Sized + AsRef<OsStr>> From<&T> for PathBuf {
|
||
/// Converts a borrowed [`OsStr`] to a [`PathBuf`].
|
||
///
|
||
/// Allocates a [`PathBuf`] and copies the data into it.
|
||
#[inline]
|
||
fn from(s: &T) -> PathBuf {
|
||
PathBuf::from(s.as_ref().to_os_string())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl From<OsString> for PathBuf {
|
||
/// Converts an [`OsString`] into a [`PathBuf`]
|
||
///
|
||
/// This conversion does not allocate or copy memory.
|
||
#[inline]
|
||
fn from(s: OsString) -> PathBuf {
|
||
PathBuf { inner: s }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "from_path_buf_for_os_string", since = "1.14.0")]
|
||
impl From<PathBuf> for OsString {
|
||
/// Converts a [`PathBuf`] into an [`OsString`]
|
||
///
|
||
/// This conversion does not allocate or copy memory.
|
||
#[inline]
|
||
fn from(path_buf: PathBuf) -> OsString {
|
||
path_buf.inner
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl From<String> for PathBuf {
|
||
/// Converts a [`String`] into a [`PathBuf`]
|
||
///
|
||
/// This conversion does not allocate or copy memory.
|
||
#[inline]
|
||
fn from(s: String) -> PathBuf {
|
||
PathBuf::from(OsString::from(s))
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_from_str", since = "1.32.0")]
|
||
impl FromStr for PathBuf {
|
||
type Err = core::convert::Infallible;
|
||
|
||
#[inline]
|
||
fn from_str(s: &str) -> Result<Self, Self::Err> {
|
||
Ok(PathBuf::from(s))
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<P: AsRef<Path>> FromIterator<P> for PathBuf {
|
||
fn from_iter<I: IntoIterator<Item = P>>(iter: I) -> PathBuf {
|
||
let mut buf = PathBuf::new();
|
||
buf.extend(iter);
|
||
buf
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl<P: AsRef<Path>> Extend<P> for PathBuf {
|
||
fn extend<I: IntoIterator<Item = P>>(&mut self, iter: I) {
|
||
iter.into_iter().for_each(move |p| self.push(p.as_ref()));
|
||
}
|
||
|
||
#[inline]
|
||
fn extend_one(&mut self, p: P) {
|
||
self.push(p.as_ref());
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl fmt::Debug for PathBuf {
|
||
fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
fmt::Debug::fmt(&**self, formatter)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl ops::Deref for PathBuf {
|
||
type Target = Path;
|
||
#[inline]
|
||
fn deref(&self) -> &Path {
|
||
Path::new(&self.inner)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_buf_deref_mut", since = "1.68.0")]
|
||
impl ops::DerefMut for PathBuf {
|
||
#[inline]
|
||
fn deref_mut(&mut self) -> &mut Path {
|
||
Path::from_inner_mut(&mut self.inner)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Borrow<Path> for PathBuf {
|
||
#[inline]
|
||
fn borrow(&self) -> &Path {
|
||
self.deref()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "default_for_pathbuf", since = "1.17.0")]
|
||
impl Default for PathBuf {
|
||
#[inline]
|
||
fn default() -> Self {
|
||
PathBuf::new()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cow_from_path", since = "1.6.0")]
|
||
impl<'a> From<&'a Path> for Cow<'a, Path> {
|
||
/// Creates a clone-on-write pointer from a reference to
|
||
/// [`Path`].
|
||
///
|
||
/// This conversion does not clone or allocate.
|
||
#[inline]
|
||
fn from(s: &'a Path) -> Cow<'a, Path> {
|
||
Cow::Borrowed(s)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cow_from_path", since = "1.6.0")]
|
||
impl<'a> From<PathBuf> for Cow<'a, Path> {
|
||
/// Creates a clone-on-write pointer from an owned
|
||
/// instance of [`PathBuf`].
|
||
///
|
||
/// This conversion does not clone or allocate.
|
||
#[inline]
|
||
fn from(s: PathBuf) -> Cow<'a, Path> {
|
||
Cow::Owned(s)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cow_from_pathbuf_ref", since = "1.28.0")]
|
||
impl<'a> From<&'a PathBuf> for Cow<'a, Path> {
|
||
/// Creates a clone-on-write pointer from a reference to
|
||
/// [`PathBuf`].
|
||
///
|
||
/// This conversion does not clone or allocate.
|
||
#[inline]
|
||
fn from(p: &'a PathBuf) -> Cow<'a, Path> {
|
||
Cow::Borrowed(p.as_path())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "pathbuf_from_cow_path", since = "1.28.0")]
|
||
impl<'a> From<Cow<'a, Path>> for PathBuf {
|
||
/// Converts a clone-on-write pointer to an owned path.
|
||
///
|
||
/// Converting from a `Cow::Owned` does not clone or allocate.
|
||
#[inline]
|
||
fn from(p: Cow<'a, Path>) -> Self {
|
||
p.into_owned()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<PathBuf> for Arc<Path> {
|
||
/// Converts a [`PathBuf`] into an <code>[Arc]<[Path]></code> by moving the [`PathBuf`] data
|
||
/// into a new [`Arc`] buffer.
|
||
#[inline]
|
||
fn from(s: PathBuf) -> Arc<Path> {
|
||
let arc: Arc<OsStr> = Arc::from(s.into_os_string());
|
||
unsafe { Arc::from_raw(Arc::into_raw(arc) as *const Path) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<&Path> for Arc<Path> {
|
||
/// Converts a [`Path`] into an [`Arc`] by copying the [`Path`] data into a new [`Arc`] buffer.
|
||
#[inline]
|
||
fn from(s: &Path) -> Arc<Path> {
|
||
let arc: Arc<OsStr> = Arc::from(s.as_os_str());
|
||
unsafe { Arc::from_raw(Arc::into_raw(arc) as *const Path) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<PathBuf> for Rc<Path> {
|
||
/// Converts a [`PathBuf`] into an <code>[Rc]<[Path]></code> by moving the [`PathBuf`] data into
|
||
/// a new [`Rc`] buffer.
|
||
#[inline]
|
||
fn from(s: PathBuf) -> Rc<Path> {
|
||
let rc: Rc<OsStr> = Rc::from(s.into_os_string());
|
||
unsafe { Rc::from_raw(Rc::into_raw(rc) as *const Path) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "shared_from_slice2", since = "1.24.0")]
|
||
impl From<&Path> for Rc<Path> {
|
||
/// Converts a [`Path`] into an [`Rc`] by copying the [`Path`] data into a new [`Rc`] buffer.
|
||
#[inline]
|
||
fn from(s: &Path) -> Rc<Path> {
|
||
let rc: Rc<OsStr> = Rc::from(s.as_os_str());
|
||
unsafe { Rc::from_raw(Rc::into_raw(rc) as *const Path) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl ToOwned for Path {
|
||
type Owned = PathBuf;
|
||
#[inline]
|
||
fn to_owned(&self) -> PathBuf {
|
||
self.to_path_buf()
|
||
}
|
||
#[inline]
|
||
fn clone_into(&self, target: &mut PathBuf) {
|
||
self.inner.clone_into(&mut target.inner);
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq for PathBuf {
|
||
#[inline]
|
||
fn eq(&self, other: &PathBuf) -> bool {
|
||
self.components() == other.components()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Hash for PathBuf {
|
||
fn hash<H: Hasher>(&self, h: &mut H) {
|
||
self.as_path().hash(h)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Eq for PathBuf {}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialOrd for PathBuf {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &PathBuf) -> Option<cmp::Ordering> {
|
||
Some(compare_components(self.components(), other.components()))
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Ord for PathBuf {
|
||
#[inline]
|
||
fn cmp(&self, other: &PathBuf) -> cmp::Ordering {
|
||
compare_components(self.components(), other.components())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for PathBuf {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
&self.inner[..]
|
||
}
|
||
}
|
||
|
||
/// A slice of a path (akin to [`str`]).
|
||
///
|
||
/// This type supports a number of operations for inspecting a path, including
|
||
/// breaking the path into its components (separated by `/` on Unix and by either
|
||
/// `/` or `\` on Windows), extracting the file name, determining whether the path
|
||
/// is absolute, and so on.
|
||
///
|
||
/// This is an *unsized* type, meaning that it must always be used behind a
|
||
/// pointer like `&` or [`Box`]. For an owned version of this type,
|
||
/// see [`PathBuf`].
|
||
///
|
||
/// More details about the overall approach can be found in
|
||
/// the [module documentation](self).
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// // Note: this example does work on Windows
|
||
/// let path = Path::new("./foo/bar.txt");
|
||
///
|
||
/// let parent = path.parent();
|
||
/// assert_eq!(parent, Some(Path::new("./foo")));
|
||
///
|
||
/// let file_stem = path.file_stem();
|
||
/// assert_eq!(file_stem, Some(OsStr::new("bar")));
|
||
///
|
||
/// let extension = path.extension();
|
||
/// assert_eq!(extension, Some(OsStr::new("txt")));
|
||
/// ```
|
||
#[cfg_attr(not(test), rustc_diagnostic_item = "Path")]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
// FIXME:
|
||
// `Path::new` current implementation relies
|
||
// on `Path` being layout-compatible with `OsStr`.
|
||
// When attribute privacy is implemented, `Path` should be annotated as `#[repr(transparent)]`.
|
||
// Anyway, `Path` representation and layout are considered implementation detail, are
|
||
// not documented and must not be relied upon.
|
||
pub struct Path {
|
||
inner: OsStr,
|
||
}
|
||
|
||
/// An error returned from [`Path::strip_prefix`] if the prefix was not found.
|
||
///
|
||
/// This `struct` is created by the [`strip_prefix`] method on [`Path`].
|
||
/// See its documentation for more.
|
||
///
|
||
/// [`strip_prefix`]: Path::strip_prefix
|
||
#[derive(Debug, Clone, PartialEq, Eq)]
|
||
#[stable(since = "1.7.0", feature = "strip_prefix")]
|
||
pub struct StripPrefixError(());
|
||
|
||
impl Path {
|
||
// The following (private!) function allows construction of a path from a u8
|
||
// slice, which is only safe when it is known to follow the OsStr encoding.
|
||
unsafe fn from_u8_slice(s: &[u8]) -> &Path {
|
||
unsafe { Path::new(OsStr::from_os_str_bytes_unchecked(s)) }
|
||
}
|
||
// The following (private!) function reveals the byte encoding used for OsStr.
|
||
fn as_u8_slice(&self) -> &[u8] {
|
||
self.inner.as_os_str_bytes()
|
||
}
|
||
|
||
/// Directly wraps a string slice as a `Path` slice.
|
||
///
|
||
/// This is a cost-free conversion.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// Path::new("foo.txt");
|
||
/// ```
|
||
///
|
||
/// You can create `Path`s from `String`s, or even other `Path`s:
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let string = String::from("foo.txt");
|
||
/// let from_string = Path::new(&string);
|
||
/// let from_path = Path::new(&from_string);
|
||
/// assert_eq!(from_string, from_path);
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn new<S: AsRef<OsStr> + ?Sized>(s: &S) -> &Path {
|
||
unsafe { &*(s.as_ref() as *const OsStr as *const Path) }
|
||
}
|
||
|
||
fn from_inner_mut(inner: &mut OsStr) -> &mut Path {
|
||
// SAFETY: Path is just a wrapper around OsStr,
|
||
// therefore converting &mut OsStr to &mut Path is safe.
|
||
unsafe { &mut *(inner as *mut OsStr as *mut Path) }
|
||
}
|
||
|
||
/// Yields the underlying [`OsStr`] slice.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let os_str = Path::new("foo.txt").as_os_str();
|
||
/// assert_eq!(os_str, std::ffi::OsStr::new("foo.txt"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn as_os_str(&self) -> &OsStr {
|
||
&self.inner
|
||
}
|
||
|
||
/// Yields a mutable reference to the underlying [`OsStr`] slice.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let mut path = PathBuf::from("Foo.TXT");
|
||
///
|
||
/// assert_ne!(path, Path::new("foo.txt"));
|
||
///
|
||
/// path.as_mut_os_str().make_ascii_lowercase();
|
||
/// assert_eq!(path, Path::new("foo.txt"));
|
||
/// ```
|
||
#[stable(feature = "path_as_mut_os_str", since = "1.70.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn as_mut_os_str(&mut self) -> &mut OsStr {
|
||
&mut self.inner
|
||
}
|
||
|
||
/// Yields a [`&str`] slice if the `Path` is valid unicode.
|
||
///
|
||
/// This conversion may entail doing a check for UTF-8 validity.
|
||
/// Note that validation is performed because non-UTF-8 strings are
|
||
/// perfectly valid for some OS.
|
||
///
|
||
/// [`&str`]: str
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("foo.txt");
|
||
/// assert_eq!(path.to_str(), Some("foo.txt"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use = "this returns the result of the operation, \
|
||
without modifying the original"]
|
||
#[inline]
|
||
pub fn to_str(&self) -> Option<&str> {
|
||
self.inner.to_str()
|
||
}
|
||
|
||
/// Converts a `Path` to a [`Cow<str>`].
|
||
///
|
||
/// Any non-Unicode sequences are replaced with
|
||
/// [`U+FFFD REPLACEMENT CHARACTER`][U+FFFD].
|
||
///
|
||
/// [U+FFFD]: super::char::REPLACEMENT_CHARACTER
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// Calling `to_string_lossy` on a `Path` with valid unicode:
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("foo.txt");
|
||
/// assert_eq!(path.to_string_lossy(), "foo.txt");
|
||
/// ```
|
||
///
|
||
/// Had `path` contained invalid unicode, the `to_string_lossy` call might
|
||
/// have returned `"fo<66>.txt"`.
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use = "this returns the result of the operation, \
|
||
without modifying the original"]
|
||
#[inline]
|
||
pub fn to_string_lossy(&self) -> Cow<'_, str> {
|
||
self.inner.to_string_lossy()
|
||
}
|
||
|
||
/// Converts a `Path` to an owned [`PathBuf`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path_buf = Path::new("foo.txt").to_path_buf();
|
||
/// assert_eq!(path_buf, std::path::PathBuf::from("foo.txt"));
|
||
/// ```
|
||
#[rustc_conversion_suggestion]
|
||
#[must_use = "this returns the result of the operation, \
|
||
without modifying the original"]
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn to_path_buf(&self) -> PathBuf {
|
||
PathBuf::from(self.inner.to_os_string())
|
||
}
|
||
|
||
/// Returns `true` if the `Path` is absolute, i.e., if it is independent of
|
||
/// the current directory.
|
||
///
|
||
/// * On Unix, a path is absolute if it starts with the root, so
|
||
/// `is_absolute` and [`has_root`] are equivalent.
|
||
///
|
||
/// * On Windows, a path is absolute if it has a prefix and starts with the
|
||
/// root: `c:\windows` is absolute, while `c:temp` and `\temp` are not.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// assert!(!Path::new("foo.txt").is_absolute());
|
||
/// ```
|
||
///
|
||
/// [`has_root`]: Path::has_root
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[allow(deprecated)]
|
||
pub fn is_absolute(&self) -> bool {
|
||
if cfg!(target_os = "redox") {
|
||
// FIXME: Allow Redox prefixes
|
||
self.has_root() || has_redox_scheme(self.as_u8_slice())
|
||
} else {
|
||
self.has_root() && (cfg!(any(unix, target_os = "wasi")) || self.prefix().is_some())
|
||
}
|
||
}
|
||
|
||
/// Returns `true` if the `Path` is relative, i.e., not absolute.
|
||
///
|
||
/// See [`is_absolute`]'s documentation for more details.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// assert!(Path::new("foo.txt").is_relative());
|
||
/// ```
|
||
///
|
||
/// [`is_absolute`]: Path::is_absolute
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn is_relative(&self) -> bool {
|
||
!self.is_absolute()
|
||
}
|
||
|
||
fn prefix(&self) -> Option<Prefix<'_>> {
|
||
self.components().prefix
|
||
}
|
||
|
||
/// Returns `true` if the `Path` has a root.
|
||
///
|
||
/// * On Unix, a path has a root if it begins with `/`.
|
||
///
|
||
/// * On Windows, a path has a root if it:
|
||
/// * has no prefix and begins with a separator, e.g., `\windows`
|
||
/// * has a prefix followed by a separator, e.g., `c:\windows` but not `c:windows`
|
||
/// * has any non-disk prefix, e.g., `\\server\share`
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// assert!(Path::new("/etc/passwd").has_root());
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn has_root(&self) -> bool {
|
||
self.components().has_root()
|
||
}
|
||
|
||
/// Returns the `Path` without its final component, if there is one.
|
||
///
|
||
/// This means it returns `Some("")` for relative paths with one component.
|
||
///
|
||
/// Returns [`None`] if the path terminates in a root or prefix, or if it's
|
||
/// the empty string.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/foo/bar");
|
||
/// let parent = path.parent().unwrap();
|
||
/// assert_eq!(parent, Path::new("/foo"));
|
||
///
|
||
/// let grand_parent = parent.parent().unwrap();
|
||
/// assert_eq!(grand_parent, Path::new("/"));
|
||
/// assert_eq!(grand_parent.parent(), None);
|
||
///
|
||
/// let relative_path = Path::new("foo/bar");
|
||
/// let parent = relative_path.parent();
|
||
/// assert_eq!(parent, Some(Path::new("foo")));
|
||
/// let grand_parent = parent.and_then(Path::parent);
|
||
/// assert_eq!(grand_parent, Some(Path::new("")));
|
||
/// let great_grand_parent = grand_parent.and_then(Path::parent);
|
||
/// assert_eq!(great_grand_parent, None);
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[doc(alias = "dirname")]
|
||
#[must_use]
|
||
pub fn parent(&self) -> Option<&Path> {
|
||
let mut comps = self.components();
|
||
let comp = comps.next_back();
|
||
comp.and_then(|p| match p {
|
||
Component::Normal(_) | Component::CurDir | Component::ParentDir => {
|
||
Some(comps.as_path())
|
||
}
|
||
_ => None,
|
||
})
|
||
}
|
||
|
||
/// Produces an iterator over `Path` and its ancestors.
|
||
///
|
||
/// The iterator will yield the `Path` that is returned if the [`parent`] method is used zero
|
||
/// or more times. That means, the iterator will yield `&self`, `&self.parent().unwrap()`,
|
||
/// `&self.parent().unwrap().parent().unwrap()` and so on. If the [`parent`] method returns
|
||
/// [`None`], the iterator will do likewise. The iterator will always yield at least one value,
|
||
/// namely `&self`.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let mut ancestors = Path::new("/foo/bar").ancestors();
|
||
/// assert_eq!(ancestors.next(), Some(Path::new("/foo/bar")));
|
||
/// assert_eq!(ancestors.next(), Some(Path::new("/foo")));
|
||
/// assert_eq!(ancestors.next(), Some(Path::new("/")));
|
||
/// assert_eq!(ancestors.next(), None);
|
||
///
|
||
/// let mut ancestors = Path::new("../foo/bar").ancestors();
|
||
/// assert_eq!(ancestors.next(), Some(Path::new("../foo/bar")));
|
||
/// assert_eq!(ancestors.next(), Some(Path::new("../foo")));
|
||
/// assert_eq!(ancestors.next(), Some(Path::new("..")));
|
||
/// assert_eq!(ancestors.next(), Some(Path::new("")));
|
||
/// assert_eq!(ancestors.next(), None);
|
||
/// ```
|
||
///
|
||
/// [`parent`]: Path::parent
|
||
#[stable(feature = "path_ancestors", since = "1.28.0")]
|
||
#[inline]
|
||
pub fn ancestors(&self) -> Ancestors<'_> {
|
||
Ancestors { next: Some(&self) }
|
||
}
|
||
|
||
/// Returns the final component of the `Path`, if there is one.
|
||
///
|
||
/// If the path is a normal file, this is the file name. If it's the path of a directory, this
|
||
/// is the directory name.
|
||
///
|
||
/// Returns [`None`] if the path terminates in `..`.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// assert_eq!(Some(OsStr::new("bin")), Path::new("/usr/bin/").file_name());
|
||
/// assert_eq!(Some(OsStr::new("foo.txt")), Path::new("tmp/foo.txt").file_name());
|
||
/// assert_eq!(Some(OsStr::new("foo.txt")), Path::new("foo.txt/.").file_name());
|
||
/// assert_eq!(Some(OsStr::new("foo.txt")), Path::new("foo.txt/.//").file_name());
|
||
/// assert_eq!(None, Path::new("foo.txt/..").file_name());
|
||
/// assert_eq!(None, Path::new("/").file_name());
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[doc(alias = "basename")]
|
||
#[must_use]
|
||
pub fn file_name(&self) -> Option<&OsStr> {
|
||
self.components().next_back().and_then(|p| match p {
|
||
Component::Normal(p) => Some(p),
|
||
_ => None,
|
||
})
|
||
}
|
||
|
||
/// Returns a path that, when joined onto `base`, yields `self`.
|
||
///
|
||
/// # Errors
|
||
///
|
||
/// If `base` is not a prefix of `self` (i.e., [`starts_with`]
|
||
/// returns `false`), returns [`Err`].
|
||
///
|
||
/// [`starts_with`]: Path::starts_with
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let path = Path::new("/test/haha/foo.txt");
|
||
///
|
||
/// assert_eq!(path.strip_prefix("/"), Ok(Path::new("test/haha/foo.txt")));
|
||
/// assert_eq!(path.strip_prefix("/test"), Ok(Path::new("haha/foo.txt")));
|
||
/// assert_eq!(path.strip_prefix("/test/"), Ok(Path::new("haha/foo.txt")));
|
||
/// assert_eq!(path.strip_prefix("/test/haha/foo.txt"), Ok(Path::new("")));
|
||
/// assert_eq!(path.strip_prefix("/test/haha/foo.txt/"), Ok(Path::new("")));
|
||
///
|
||
/// assert!(path.strip_prefix("test").is_err());
|
||
/// assert!(path.strip_prefix("/haha").is_err());
|
||
///
|
||
/// let prefix = PathBuf::from("/test/");
|
||
/// assert_eq!(path.strip_prefix(prefix), Ok(Path::new("haha/foo.txt")));
|
||
/// ```
|
||
#[stable(since = "1.7.0", feature = "path_strip_prefix")]
|
||
pub fn strip_prefix<P>(&self, base: P) -> Result<&Path, StripPrefixError>
|
||
where
|
||
P: AsRef<Path>,
|
||
{
|
||
self._strip_prefix(base.as_ref())
|
||
}
|
||
|
||
fn _strip_prefix(&self, base: &Path) -> Result<&Path, StripPrefixError> {
|
||
iter_after(self.components(), base.components())
|
||
.map(|c| c.as_path())
|
||
.ok_or(StripPrefixError(()))
|
||
}
|
||
|
||
/// Determines whether `base` is a prefix of `self`.
|
||
///
|
||
/// Only considers whole path components to match.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/etc/passwd");
|
||
///
|
||
/// assert!(path.starts_with("/etc"));
|
||
/// assert!(path.starts_with("/etc/"));
|
||
/// assert!(path.starts_with("/etc/passwd"));
|
||
/// assert!(path.starts_with("/etc/passwd/")); // extra slash is okay
|
||
/// assert!(path.starts_with("/etc/passwd///")); // multiple extra slashes are okay
|
||
///
|
||
/// assert!(!path.starts_with("/e"));
|
||
/// assert!(!path.starts_with("/etc/passwd.txt"));
|
||
///
|
||
/// assert!(!Path::new("/etc/foo.rs").starts_with("/etc/foo"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
pub fn starts_with<P: AsRef<Path>>(&self, base: P) -> bool {
|
||
self._starts_with(base.as_ref())
|
||
}
|
||
|
||
fn _starts_with(&self, base: &Path) -> bool {
|
||
iter_after(self.components(), base.components()).is_some()
|
||
}
|
||
|
||
/// Determines whether `child` is a suffix of `self`.
|
||
///
|
||
/// Only considers whole path components to match.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/etc/resolv.conf");
|
||
///
|
||
/// assert!(path.ends_with("resolv.conf"));
|
||
/// assert!(path.ends_with("etc/resolv.conf"));
|
||
/// assert!(path.ends_with("/etc/resolv.conf"));
|
||
///
|
||
/// assert!(!path.ends_with("/resolv.conf"));
|
||
/// assert!(!path.ends_with("conf")); // use .extension() instead
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
pub fn ends_with<P: AsRef<Path>>(&self, child: P) -> bool {
|
||
self._ends_with(child.as_ref())
|
||
}
|
||
|
||
fn _ends_with(&self, child: &Path) -> bool {
|
||
iter_after(self.components().rev(), child.components().rev()).is_some()
|
||
}
|
||
|
||
/// Extracts the stem (non-extension) portion of [`self.file_name`].
|
||
///
|
||
/// [`self.file_name`]: Path::file_name
|
||
///
|
||
/// The stem is:
|
||
///
|
||
/// * [`None`], if there is no file name;
|
||
/// * The entire file name if there is no embedded `.`;
|
||
/// * The entire file name if the file name begins with `.` and has no other `.`s within;
|
||
/// * Otherwise, the portion of the file name before the final `.`
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// assert_eq!("foo", Path::new("foo.rs").file_stem().unwrap());
|
||
/// assert_eq!("foo.tar", Path::new("foo.tar.gz").file_stem().unwrap());
|
||
/// ```
|
||
///
|
||
/// # See Also
|
||
/// This method is similar to [`Path::file_prefix`], which extracts the portion of the file name
|
||
/// before the *first* `.`
|
||
///
|
||
/// [`Path::file_prefix`]: Path::file_prefix
|
||
///
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
pub fn file_stem(&self) -> Option<&OsStr> {
|
||
self.file_name().map(rsplit_file_at_dot).and_then(|(before, after)| before.or(after))
|
||
}
|
||
|
||
/// Extracts the prefix of [`self.file_name`].
|
||
///
|
||
/// The prefix is:
|
||
///
|
||
/// * [`None`], if there is no file name;
|
||
/// * The entire file name if there is no embedded `.`;
|
||
/// * The portion of the file name before the first non-beginning `.`;
|
||
/// * The entire file name if the file name begins with `.` and has no other `.`s within;
|
||
/// * The portion of the file name before the second `.` if the file name begins with `.`
|
||
///
|
||
/// [`self.file_name`]: Path::file_name
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// # #![feature(path_file_prefix)]
|
||
/// use std::path::Path;
|
||
///
|
||
/// assert_eq!("foo", Path::new("foo.rs").file_prefix().unwrap());
|
||
/// assert_eq!("foo", Path::new("foo.tar.gz").file_prefix().unwrap());
|
||
/// ```
|
||
///
|
||
/// # See Also
|
||
/// This method is similar to [`Path::file_stem`], which extracts the portion of the file name
|
||
/// before the *last* `.`
|
||
///
|
||
/// [`Path::file_stem`]: Path::file_stem
|
||
///
|
||
#[unstable(feature = "path_file_prefix", issue = "86319")]
|
||
#[must_use]
|
||
pub fn file_prefix(&self) -> Option<&OsStr> {
|
||
self.file_name().map(split_file_at_dot).and_then(|(before, _after)| Some(before))
|
||
}
|
||
|
||
/// Extracts the extension (without the leading dot) of [`self.file_name`], if possible.
|
||
///
|
||
/// The extension is:
|
||
///
|
||
/// * [`None`], if there is no file name;
|
||
/// * [`None`], if there is no embedded `.`;
|
||
/// * [`None`], if the file name begins with `.` and has no other `.`s within;
|
||
/// * Otherwise, the portion of the file name after the final `.`
|
||
///
|
||
/// [`self.file_name`]: Path::file_name
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// assert_eq!("rs", Path::new("foo.rs").extension().unwrap());
|
||
/// assert_eq!("gz", Path::new("foo.tar.gz").extension().unwrap());
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
pub fn extension(&self) -> Option<&OsStr> {
|
||
self.file_name().map(rsplit_file_at_dot).and_then(|(before, after)| before.and(after))
|
||
}
|
||
|
||
/// Creates an owned [`PathBuf`] with `path` adjoined to `self`.
|
||
///
|
||
/// If `path` is absolute, it replaces the current path.
|
||
///
|
||
/// See [`PathBuf::push`] for more details on what it means to adjoin a path.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// assert_eq!(Path::new("/etc").join("passwd"), PathBuf::from("/etc/passwd"));
|
||
/// assert_eq!(Path::new("/etc").join("/bin/sh"), PathBuf::from("/bin/sh"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
pub fn join<P: AsRef<Path>>(&self, path: P) -> PathBuf {
|
||
self._join(path.as_ref())
|
||
}
|
||
|
||
fn _join(&self, path: &Path) -> PathBuf {
|
||
let mut buf = self.to_path_buf();
|
||
buf.push(path);
|
||
buf
|
||
}
|
||
|
||
/// Creates an owned [`PathBuf`] like `self` but with the given file name.
|
||
///
|
||
/// See [`PathBuf::set_file_name`] for more details.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let path = Path::new("/tmp/foo.png");
|
||
/// assert_eq!(path.with_file_name("bar"), PathBuf::from("/tmp/bar"));
|
||
/// assert_eq!(path.with_file_name("bar.txt"), PathBuf::from("/tmp/bar.txt"));
|
||
///
|
||
/// let path = Path::new("/tmp");
|
||
/// assert_eq!(path.with_file_name("var"), PathBuf::from("/var"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use]
|
||
pub fn with_file_name<S: AsRef<OsStr>>(&self, file_name: S) -> PathBuf {
|
||
self._with_file_name(file_name.as_ref())
|
||
}
|
||
|
||
fn _with_file_name(&self, file_name: &OsStr) -> PathBuf {
|
||
let mut buf = self.to_path_buf();
|
||
buf.set_file_name(file_name);
|
||
buf
|
||
}
|
||
|
||
/// Creates an owned [`PathBuf`] like `self` but with the given extension.
|
||
///
|
||
/// See [`PathBuf::set_extension`] for more details.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let path = Path::new("foo.rs");
|
||
/// assert_eq!(path.with_extension("txt"), PathBuf::from("foo.txt"));
|
||
///
|
||
/// let path = Path::new("foo.tar.gz");
|
||
/// assert_eq!(path.with_extension(""), PathBuf::from("foo.tar"));
|
||
/// assert_eq!(path.with_extension("xz"), PathBuf::from("foo.tar.xz"));
|
||
/// assert_eq!(path.with_extension("").with_extension("txt"), PathBuf::from("foo.txt"));
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn with_extension<S: AsRef<OsStr>>(&self, extension: S) -> PathBuf {
|
||
self._with_extension(extension.as_ref())
|
||
}
|
||
|
||
fn _with_extension(&self, extension: &OsStr) -> PathBuf {
|
||
let mut buf = self.to_path_buf();
|
||
buf.set_extension(extension);
|
||
buf
|
||
}
|
||
|
||
/// Produces an iterator over the [`Component`]s of the path.
|
||
///
|
||
/// When parsing the path, there is a small amount of normalization:
|
||
///
|
||
/// * Repeated separators are ignored, so `a/b` and `a//b` both have
|
||
/// `a` and `b` as components.
|
||
///
|
||
/// * Occurrences of `.` are normalized away, except if they are at the
|
||
/// beginning of the path. For example, `a/./b`, `a/b/`, `a/b/.` and
|
||
/// `a/b` all have `a` and `b` as components, but `./a/b` starts with
|
||
/// an additional [`CurDir`] component.
|
||
///
|
||
/// * A trailing slash is normalized away, `/a/b` and `/a/b/` are equivalent.
|
||
///
|
||
/// Note that no other normalization takes place; in particular, `a/c`
|
||
/// and `a/b/../c` are distinct, to account for the possibility that `b`
|
||
/// is a symbolic link (so its parent isn't `a`).
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{Path, Component};
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// let mut components = Path::new("/tmp/foo.txt").components();
|
||
///
|
||
/// assert_eq!(components.next(), Some(Component::RootDir));
|
||
/// assert_eq!(components.next(), Some(Component::Normal(OsStr::new("tmp"))));
|
||
/// assert_eq!(components.next(), Some(Component::Normal(OsStr::new("foo.txt"))));
|
||
/// assert_eq!(components.next(), None)
|
||
/// ```
|
||
///
|
||
/// [`CurDir`]: Component::CurDir
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub fn components(&self) -> Components<'_> {
|
||
let prefix = parse_prefix(self.as_os_str());
|
||
Components {
|
||
path: self.as_u8_slice(),
|
||
prefix,
|
||
has_physical_root: has_physical_root(self.as_u8_slice(), prefix)
|
||
|| has_redox_scheme(self.as_u8_slice()),
|
||
front: State::Prefix,
|
||
back: State::Body,
|
||
}
|
||
}
|
||
|
||
/// Produces an iterator over the path's components viewed as [`OsStr`]
|
||
/// slices.
|
||
///
|
||
/// For more information about the particulars of how the path is separated
|
||
/// into components, see [`components`].
|
||
///
|
||
/// [`components`]: Path::components
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::{self, Path};
|
||
/// use std::ffi::OsStr;
|
||
///
|
||
/// let mut it = Path::new("/tmp/foo.txt").iter();
|
||
/// assert_eq!(it.next(), Some(OsStr::new(&path::MAIN_SEPARATOR.to_string())));
|
||
/// assert_eq!(it.next(), Some(OsStr::new("tmp")));
|
||
/// assert_eq!(it.next(), Some(OsStr::new("foo.txt")));
|
||
/// assert_eq!(it.next(), None)
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[inline]
|
||
pub fn iter(&self) -> Iter<'_> {
|
||
Iter { inner: self.components() }
|
||
}
|
||
|
||
/// Returns an object that implements [`Display`] for safely printing paths
|
||
/// that may contain non-Unicode data. This may perform lossy conversion,
|
||
/// depending on the platform. If you would like an implementation which
|
||
/// escapes the path please use [`Debug`] instead.
|
||
///
|
||
/// [`Display`]: fmt::Display
|
||
/// [`Debug`]: fmt::Debug
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/tmp/foo.rs");
|
||
///
|
||
/// println!("{}", path.display());
|
||
/// ```
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
#[must_use = "this does not display the path, \
|
||
it returns an object that can be displayed"]
|
||
#[inline]
|
||
pub fn display(&self) -> Display<'_> {
|
||
Display { path: self }
|
||
}
|
||
|
||
/// Queries the file system to get information about a file, directory, etc.
|
||
///
|
||
/// This function will traverse symbolic links to query information about the
|
||
/// destination file.
|
||
///
|
||
/// This is an alias to [`fs::metadata`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/Minas/tirith");
|
||
/// let metadata = path.metadata().expect("metadata call failed");
|
||
/// println!("{:?}", metadata.file_type());
|
||
/// ```
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[inline]
|
||
pub fn metadata(&self) -> io::Result<fs::Metadata> {
|
||
fs::metadata(self)
|
||
}
|
||
|
||
/// Queries the metadata about a file without following symlinks.
|
||
///
|
||
/// This is an alias to [`fs::symlink_metadata`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/Minas/tirith");
|
||
/// let metadata = path.symlink_metadata().expect("symlink_metadata call failed");
|
||
/// println!("{:?}", metadata.file_type());
|
||
/// ```
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[inline]
|
||
pub fn symlink_metadata(&self) -> io::Result<fs::Metadata> {
|
||
fs::symlink_metadata(self)
|
||
}
|
||
|
||
/// Returns the canonical, absolute form of the path with all intermediate
|
||
/// components normalized and symbolic links resolved.
|
||
///
|
||
/// This is an alias to [`fs::canonicalize`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::{Path, PathBuf};
|
||
///
|
||
/// let path = Path::new("/foo/test/../test/bar.rs");
|
||
/// assert_eq!(path.canonicalize().unwrap(), PathBuf::from("/foo/test/bar.rs"));
|
||
/// ```
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[inline]
|
||
pub fn canonicalize(&self) -> io::Result<PathBuf> {
|
||
fs::canonicalize(self)
|
||
}
|
||
|
||
/// Reads a symbolic link, returning the file that the link points to.
|
||
///
|
||
/// This is an alias to [`fs::read_link`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/laputa/sky_castle.rs");
|
||
/// let path_link = path.read_link().expect("read_link call failed");
|
||
/// ```
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[inline]
|
||
pub fn read_link(&self) -> io::Result<PathBuf> {
|
||
fs::read_link(self)
|
||
}
|
||
|
||
/// Returns an iterator over the entries within a directory.
|
||
///
|
||
/// The iterator will yield instances of <code>[io::Result]<[fs::DirEntry]></code>. New
|
||
/// errors may be encountered after an iterator is initially constructed.
|
||
///
|
||
/// This is an alias to [`fs::read_dir`].
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/laputa");
|
||
/// for entry in path.read_dir().expect("read_dir call failed") {
|
||
/// if let Ok(entry) = entry {
|
||
/// println!("{:?}", entry.path());
|
||
/// }
|
||
/// }
|
||
/// ```
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[inline]
|
||
pub fn read_dir(&self) -> io::Result<fs::ReadDir> {
|
||
fs::read_dir(self)
|
||
}
|
||
|
||
/// Returns `true` if the path points at an existing entity.
|
||
///
|
||
/// Warning: this method may be error-prone, consider using [`try_exists()`] instead!
|
||
/// It also has a risk of introducing time-of-check to time-of-use (TOCTOU) bugs.
|
||
///
|
||
/// This function will traverse symbolic links to query information about the
|
||
/// destination file.
|
||
///
|
||
/// If you cannot access the metadata of the file, e.g. because of a
|
||
/// permission error or broken symbolic links, this will return `false`.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
/// assert!(!Path::new("does_not_exist.txt").exists());
|
||
/// ```
|
||
///
|
||
/// # See Also
|
||
///
|
||
/// This is a convenience function that coerces errors to false. If you want to
|
||
/// check errors, call [`Path::try_exists`].
|
||
///
|
||
/// [`try_exists()`]: Self::try_exists
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[must_use]
|
||
#[inline]
|
||
pub fn exists(&self) -> bool {
|
||
fs::metadata(self).is_ok()
|
||
}
|
||
|
||
/// Returns `Ok(true)` if the path points at an existing entity.
|
||
///
|
||
/// This function will traverse symbolic links to query information about the
|
||
/// destination file. In case of broken symbolic links this will return `Ok(false)`.
|
||
///
|
||
/// [`Path::exists()`] only checks whether or not a path was both found and readable. By
|
||
/// contrast, `try_exists` will return `Ok(true)` or `Ok(false)`, respectively, if the path
|
||
/// was _verified_ to exist or not exist. If its existence can neither be confirmed nor
|
||
/// denied, it will propagate an `Err(_)` instead. This can be the case if e.g. listing
|
||
/// permission is denied on one of the parent directories.
|
||
///
|
||
/// Note that while this avoids some pitfalls of the `exists()` method, it still can not
|
||
/// prevent time-of-check to time-of-use (TOCTOU) bugs. You should only use it in scenarios
|
||
/// where those bugs are not an issue.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
/// assert!(!Path::new("does_not_exist.txt").try_exists().expect("Can't check existence of file does_not_exist.txt"));
|
||
/// assert!(Path::new("/root/secret_file.txt").try_exists().is_err());
|
||
/// ```
|
||
///
|
||
/// [`exists()`]: Self::exists
|
||
#[stable(feature = "path_try_exists", since = "1.63.0")]
|
||
#[inline]
|
||
pub fn try_exists(&self) -> io::Result<bool> {
|
||
fs::try_exists(self)
|
||
}
|
||
|
||
/// Returns `true` if the path exists on disk and is pointing at a regular file.
|
||
///
|
||
/// This function will traverse symbolic links to query information about the
|
||
/// destination file.
|
||
///
|
||
/// If you cannot access the metadata of the file, e.g. because of a
|
||
/// permission error or broken symbolic links, this will return `false`.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
/// assert_eq!(Path::new("./is_a_directory/").is_file(), false);
|
||
/// assert_eq!(Path::new("a_file.txt").is_file(), true);
|
||
/// ```
|
||
///
|
||
/// # See Also
|
||
///
|
||
/// This is a convenience function that coerces errors to false. If you want to
|
||
/// check errors, call [`fs::metadata`] and handle its [`Result`]. Then call
|
||
/// [`fs::Metadata::is_file`] if it was [`Ok`].
|
||
///
|
||
/// When the goal is simply to read from (or write to) the source, the most
|
||
/// reliable way to test the source can be read (or written to) is to open
|
||
/// it. Only using `is_file` can break workflows like `diff <( prog_a )` on
|
||
/// a Unix-like system for example. See [`fs::File::open`] or
|
||
/// [`fs::OpenOptions::open`] for more information.
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[must_use]
|
||
pub fn is_file(&self) -> bool {
|
||
fs::metadata(self).map(|m| m.is_file()).unwrap_or(false)
|
||
}
|
||
|
||
/// Returns `true` if the path exists on disk and is pointing at a directory.
|
||
///
|
||
/// This function will traverse symbolic links to query information about the
|
||
/// destination file.
|
||
///
|
||
/// If you cannot access the metadata of the file, e.g. because of a
|
||
/// permission error or broken symbolic links, this will return `false`.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```no_run
|
||
/// use std::path::Path;
|
||
/// assert_eq!(Path::new("./is_a_directory/").is_dir(), true);
|
||
/// assert_eq!(Path::new("a_file.txt").is_dir(), false);
|
||
/// ```
|
||
///
|
||
/// # See Also
|
||
///
|
||
/// This is a convenience function that coerces errors to false. If you want to
|
||
/// check errors, call [`fs::metadata`] and handle its [`Result`]. Then call
|
||
/// [`fs::Metadata::is_dir`] if it was [`Ok`].
|
||
#[stable(feature = "path_ext", since = "1.5.0")]
|
||
#[must_use]
|
||
pub fn is_dir(&self) -> bool {
|
||
fs::metadata(self).map(|m| m.is_dir()).unwrap_or(false)
|
||
}
|
||
|
||
/// Returns `true` if the path exists on disk and is pointing at a symbolic link.
|
||
///
|
||
/// This function will not traverse symbolic links.
|
||
/// In case of a broken symbolic link this will also return true.
|
||
///
|
||
/// If you cannot access the directory containing the file, e.g., because of a
|
||
/// permission error, this will return false.
|
||
///
|
||
/// # Examples
|
||
///
|
||
#[cfg_attr(unix, doc = "```no_run")]
|
||
#[cfg_attr(not(unix), doc = "```ignore")]
|
||
/// use std::path::Path;
|
||
/// use std::os::unix::fs::symlink;
|
||
///
|
||
/// let link_path = Path::new("link");
|
||
/// symlink("/origin_does_not_exist/", link_path).unwrap();
|
||
/// assert_eq!(link_path.is_symlink(), true);
|
||
/// assert_eq!(link_path.exists(), false);
|
||
/// ```
|
||
///
|
||
/// # See Also
|
||
///
|
||
/// This is a convenience function that coerces errors to false. If you want to
|
||
/// check errors, call [`fs::symlink_metadata`] and handle its [`Result`]. Then call
|
||
/// [`fs::Metadata::is_symlink`] if it was [`Ok`].
|
||
#[must_use]
|
||
#[stable(feature = "is_symlink", since = "1.58.0")]
|
||
pub fn is_symlink(&self) -> bool {
|
||
fs::symlink_metadata(self).map(|m| m.is_symlink()).unwrap_or(false)
|
||
}
|
||
|
||
/// Converts a [`Box<Path>`](Box) into a [`PathBuf`] without copying or
|
||
/// allocating.
|
||
#[stable(feature = "into_boxed_path", since = "1.20.0")]
|
||
#[must_use = "`self` will be dropped if the result is not used"]
|
||
pub fn into_path_buf(self: Box<Path>) -> PathBuf {
|
||
let rw = Box::into_raw(self) as *mut OsStr;
|
||
let inner = unsafe { Box::from_raw(rw) };
|
||
PathBuf { inner: OsString::from(inner) }
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<OsStr> for Path {
|
||
#[inline]
|
||
fn as_ref(&self) -> &OsStr {
|
||
&self.inner
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl fmt::Debug for Path {
|
||
fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
fmt::Debug::fmt(&self.inner, formatter)
|
||
}
|
||
}
|
||
|
||
/// Helper struct for safely printing paths with [`format!`] and `{}`.
|
||
///
|
||
/// A [`Path`] might contain non-Unicode data. This `struct` implements the
|
||
/// [`Display`] trait in a way that mitigates that. It is created by the
|
||
/// [`display`](Path::display) method on [`Path`]. This may perform lossy
|
||
/// conversion, depending on the platform. If you would like an implementation
|
||
/// which escapes the path please use [`Debug`] instead.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ```
|
||
/// use std::path::Path;
|
||
///
|
||
/// let path = Path::new("/tmp/foo.rs");
|
||
///
|
||
/// println!("{}", path.display());
|
||
/// ```
|
||
///
|
||
/// [`Display`]: fmt::Display
|
||
/// [`format!`]: crate::format
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
pub struct Display<'a> {
|
||
path: &'a Path,
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl fmt::Debug for Display<'_> {
|
||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
fmt::Debug::fmt(&self.path, f)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl fmt::Display for Display<'_> {
|
||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
self.path.inner.display(f)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialEq for Path {
|
||
#[inline]
|
||
fn eq(&self, other: &Path) -> bool {
|
||
self.components() == other.components()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Hash for Path {
|
||
fn hash<H: Hasher>(&self, h: &mut H) {
|
||
let bytes = self.as_u8_slice();
|
||
let (prefix_len, verbatim) = match parse_prefix(&self.inner) {
|
||
Some(prefix) => {
|
||
prefix.hash(h);
|
||
(prefix.len(), prefix.is_verbatim())
|
||
}
|
||
None => (0, false),
|
||
};
|
||
let bytes = &bytes[prefix_len..];
|
||
|
||
let mut component_start = 0;
|
||
let mut bytes_hashed = 0;
|
||
|
||
for i in 0..bytes.len() {
|
||
let is_sep = if verbatim { is_verbatim_sep(bytes[i]) } else { is_sep_byte(bytes[i]) };
|
||
if is_sep {
|
||
if i > component_start {
|
||
let to_hash = &bytes[component_start..i];
|
||
h.write(to_hash);
|
||
bytes_hashed += to_hash.len();
|
||
}
|
||
|
||
// skip over separator and optionally a following CurDir item
|
||
// since components() would normalize these away.
|
||
component_start = i + 1;
|
||
|
||
let tail = &bytes[component_start..];
|
||
|
||
if !verbatim {
|
||
component_start += match tail {
|
||
[b'.'] => 1,
|
||
[b'.', sep @ _, ..] if is_sep_byte(*sep) => 1,
|
||
_ => 0,
|
||
};
|
||
}
|
||
}
|
||
}
|
||
|
||
if component_start < bytes.len() {
|
||
let to_hash = &bytes[component_start..];
|
||
h.write(to_hash);
|
||
bytes_hashed += to_hash.len();
|
||
}
|
||
|
||
h.write_usize(bytes_hashed);
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Eq for Path {}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl PartialOrd for Path {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &Path) -> Option<cmp::Ordering> {
|
||
Some(compare_components(self.components(), other.components()))
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl Ord for Path {
|
||
#[inline]
|
||
fn cmp(&self, other: &Path) -> cmp::Ordering {
|
||
compare_components(self.components(), other.components())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for Path {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
self
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for OsStr {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
Path::new(self)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cow_os_str_as_ref_path", since = "1.8.0")]
|
||
impl AsRef<Path> for Cow<'_, OsStr> {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
Path::new(self)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for OsString {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
Path::new(self)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for str {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
Path::new(self)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for String {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
Path::new(self)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "rust1", since = "1.0.0")]
|
||
impl AsRef<Path> for PathBuf {
|
||
#[inline]
|
||
fn as_ref(&self) -> &Path {
|
||
self
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_into_iter", since = "1.6.0")]
|
||
impl<'a> IntoIterator for &'a PathBuf {
|
||
type Item = &'a OsStr;
|
||
type IntoIter = Iter<'a>;
|
||
#[inline]
|
||
fn into_iter(self) -> Iter<'a> {
|
||
self.iter()
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "path_into_iter", since = "1.6.0")]
|
||
impl<'a> IntoIterator for &'a Path {
|
||
type Item = &'a OsStr;
|
||
type IntoIter = Iter<'a>;
|
||
#[inline]
|
||
fn into_iter(self) -> Iter<'a> {
|
||
self.iter()
|
||
}
|
||
}
|
||
|
||
macro_rules! impl_cmp {
|
||
(<$($life:lifetime),*> $lhs:ty, $rhs: ty) => {
|
||
#[stable(feature = "partialeq_path", since = "1.6.0")]
|
||
impl<$($life),*> PartialEq<$rhs> for $lhs {
|
||
#[inline]
|
||
fn eq(&self, other: &$rhs) -> bool {
|
||
<Path as PartialEq>::eq(self, other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "partialeq_path", since = "1.6.0")]
|
||
impl<$($life),*> PartialEq<$lhs> for $rhs {
|
||
#[inline]
|
||
fn eq(&self, other: &$lhs) -> bool {
|
||
<Path as PartialEq>::eq(self, other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_path", since = "1.8.0")]
|
||
impl<$($life),*> PartialOrd<$rhs> for $lhs {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &$rhs) -> Option<cmp::Ordering> {
|
||
<Path as PartialOrd>::partial_cmp(self, other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_path", since = "1.8.0")]
|
||
impl<$($life),*> PartialOrd<$lhs> for $rhs {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &$lhs) -> Option<cmp::Ordering> {
|
||
<Path as PartialOrd>::partial_cmp(self, other)
|
||
}
|
||
}
|
||
};
|
||
}
|
||
|
||
impl_cmp!(<> PathBuf, Path);
|
||
impl_cmp!(<'a> PathBuf, &'a Path);
|
||
impl_cmp!(<'a> Cow<'a, Path>, Path);
|
||
impl_cmp!(<'a, 'b> Cow<'a, Path>, &'b Path);
|
||
impl_cmp!(<'a> Cow<'a, Path>, PathBuf);
|
||
|
||
macro_rules! impl_cmp_os_str {
|
||
(<$($life:lifetime),*> $lhs:ty, $rhs: ty) => {
|
||
#[stable(feature = "cmp_path", since = "1.8.0")]
|
||
impl<$($life),*> PartialEq<$rhs> for $lhs {
|
||
#[inline]
|
||
fn eq(&self, other: &$rhs) -> bool {
|
||
<Path as PartialEq>::eq(self, other.as_ref())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_path", since = "1.8.0")]
|
||
impl<$($life),*> PartialEq<$lhs> for $rhs {
|
||
#[inline]
|
||
fn eq(&self, other: &$lhs) -> bool {
|
||
<Path as PartialEq>::eq(self.as_ref(), other)
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_path", since = "1.8.0")]
|
||
impl<$($life),*> PartialOrd<$rhs> for $lhs {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &$rhs) -> Option<cmp::Ordering> {
|
||
<Path as PartialOrd>::partial_cmp(self, other.as_ref())
|
||
}
|
||
}
|
||
|
||
#[stable(feature = "cmp_path", since = "1.8.0")]
|
||
impl<$($life),*> PartialOrd<$lhs> for $rhs {
|
||
#[inline]
|
||
fn partial_cmp(&self, other: &$lhs) -> Option<cmp::Ordering> {
|
||
<Path as PartialOrd>::partial_cmp(self.as_ref(), other)
|
||
}
|
||
}
|
||
};
|
||
}
|
||
|
||
impl_cmp_os_str!(<> PathBuf, OsStr);
|
||
impl_cmp_os_str!(<'a> PathBuf, &'a OsStr);
|
||
impl_cmp_os_str!(<'a> PathBuf, Cow<'a, OsStr>);
|
||
impl_cmp_os_str!(<> PathBuf, OsString);
|
||
impl_cmp_os_str!(<> Path, OsStr);
|
||
impl_cmp_os_str!(<'a> Path, &'a OsStr);
|
||
impl_cmp_os_str!(<'a> Path, Cow<'a, OsStr>);
|
||
impl_cmp_os_str!(<> Path, OsString);
|
||
impl_cmp_os_str!(<'a> &'a Path, OsStr);
|
||
impl_cmp_os_str!(<'a, 'b> &'a Path, Cow<'b, OsStr>);
|
||
impl_cmp_os_str!(<'a> &'a Path, OsString);
|
||
impl_cmp_os_str!(<'a> Cow<'a, Path>, OsStr);
|
||
impl_cmp_os_str!(<'a, 'b> Cow<'a, Path>, &'b OsStr);
|
||
impl_cmp_os_str!(<'a> Cow<'a, Path>, OsString);
|
||
|
||
#[stable(since = "1.7.0", feature = "strip_prefix")]
|
||
impl fmt::Display for StripPrefixError {
|
||
#[allow(deprecated, deprecated_in_future)]
|
||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||
self.description().fmt(f)
|
||
}
|
||
}
|
||
|
||
#[stable(since = "1.7.0", feature = "strip_prefix")]
|
||
impl Error for StripPrefixError {
|
||
#[allow(deprecated)]
|
||
fn description(&self) -> &str {
|
||
"prefix not found"
|
||
}
|
||
}
|
||
|
||
/// Makes the path absolute without accessing the filesystem.
|
||
///
|
||
/// If the path is relative, the current directory is used as the base directory.
|
||
/// All intermediate components will be resolved according to platforms-specific
|
||
/// rules but unlike [`canonicalize`][crate::fs::canonicalize] this does not
|
||
/// resolve symlinks and may succeed even if the path does not exist.
|
||
///
|
||
/// If the `path` is empty or getting the
|
||
/// [current directory][crate::env::current_dir] fails then an error will be
|
||
/// returned.
|
||
///
|
||
/// # Examples
|
||
///
|
||
/// ## Posix paths
|
||
///
|
||
/// ```
|
||
/// #![feature(absolute_path)]
|
||
/// # #[cfg(unix)]
|
||
/// fn main() -> std::io::Result<()> {
|
||
/// use std::path::{self, Path};
|
||
///
|
||
/// // Relative to absolute
|
||
/// let absolute = path::absolute("foo/./bar")?;
|
||
/// assert!(absolute.ends_with("foo/bar"));
|
||
///
|
||
/// // Absolute to absolute
|
||
/// let absolute = path::absolute("/foo//test/.././bar.rs")?;
|
||
/// assert_eq!(absolute, Path::new("/foo/test/../bar.rs"));
|
||
/// Ok(())
|
||
/// }
|
||
/// # #[cfg(not(unix))]
|
||
/// # fn main() {}
|
||
/// ```
|
||
///
|
||
/// The path is resolved using [POSIX semantics][posix-semantics] except that
|
||
/// it stops short of resolving symlinks. This means it will keep `..`
|
||
/// components and trailing slashes.
|
||
///
|
||
/// ## Windows paths
|
||
///
|
||
/// ```
|
||
/// #![feature(absolute_path)]
|
||
/// # #[cfg(windows)]
|
||
/// fn main() -> std::io::Result<()> {
|
||
/// use std::path::{self, Path};
|
||
///
|
||
/// // Relative to absolute
|
||
/// let absolute = path::absolute("foo/./bar")?;
|
||
/// assert!(absolute.ends_with(r"foo\bar"));
|
||
///
|
||
/// // Absolute to absolute
|
||
/// let absolute = path::absolute(r"C:\foo//test\..\./bar.rs")?;
|
||
///
|
||
/// assert_eq!(absolute, Path::new(r"C:\foo\bar.rs"));
|
||
/// Ok(())
|
||
/// }
|
||
/// # #[cfg(not(windows))]
|
||
/// # fn main() {}
|
||
/// ```
|
||
///
|
||
/// For verbatim paths this will simply return the path as given. For other
|
||
/// paths this is currently equivalent to calling [`GetFullPathNameW`][windows-path]
|
||
/// This may change in the future.
|
||
///
|
||
/// [posix-semantics]: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13
|
||
/// [windows-path]: https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfullpathnamew
|
||
#[unstable(feature = "absolute_path", issue = "92750")]
|
||
pub fn absolute<P: AsRef<Path>>(path: P) -> io::Result<PathBuf> {
|
||
let path = path.as_ref();
|
||
if path.as_os_str().is_empty() {
|
||
Err(io::const_io_error!(io::ErrorKind::InvalidInput, "cannot make an empty path absolute",))
|
||
} else {
|
||
sys::path::absolute(path)
|
||
}
|
||
}
|