diff options
Diffstat (limited to 'vendor/rustix/src/path/dec_int.rs')
-rw-r--r-- | vendor/rustix/src/path/dec_int.rs | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/vendor/rustix/src/path/dec_int.rs b/vendor/rustix/src/path/dec_int.rs deleted file mode 100644 index e9c46f4..0000000 --- a/vendor/rustix/src/path/dec_int.rs +++ /dev/null @@ -1,120 +0,0 @@ -//! Efficient decimal integer formatting. -//! -//! # Safety -//! -//! This uses `CStr::from_bytes_with_nul_unchecked` and -//! `str::from_utf8_unchecked`on the buffer that it filled itself. -#![allow(unsafe_code)] - -use crate::backend::fd::{AsFd, AsRawFd}; -use crate::ffi::CStr; -use core::fmt::Write; -use itoa::{Buffer, Integer}; -#[cfg(all(feature = "std", unix))] -use std::os::unix::ffi::OsStrExt; -#[cfg(all(feature = "std", target_os = "wasi"))] -use std::os::wasi::ffi::OsStrExt; -#[cfg(feature = "std")] -use {core::fmt, std::ffi::OsStr, std::path::Path}; - -/// Format an integer into a decimal `Path` component, without constructing a -/// temporary `PathBuf` or `String`. -/// -/// This is used for opening paths such as `/proc/self/fd/<fd>` on Linux. -/// -/// # Examples -/// -/// ``` -/// # #[cfg(any(feature = "fs", feature = "net"))] -/// use rustix::path::DecInt; -/// -/// # #[cfg(any(feature = "fs", feature = "net"))] -/// assert_eq!( -/// format!("hello {}", DecInt::new(9876).as_ref().display()), -/// "hello 9876" -/// ); -/// ``` -#[derive(Clone)] -pub struct DecInt { - // 20 `u8`s is enough to hold the decimal ASCII representation of any - // `u64`, and we add one for a NUL terminator for `as_c_str`. - buf: [u8; 20 + 1], - len: usize, -} - -impl DecInt { - /// Construct a new path component from an integer. - #[inline] - pub fn new<Int: Integer>(i: Int) -> Self { - let mut me = DecIntWriter(Self { - buf: [0; 20 + 1], - len: 0, - }); - let mut buf = Buffer::new(); - me.write_str(buf.format(i)).unwrap(); - me.0 - } - - /// Construct a new path component from a file descriptor. - #[inline] - pub fn from_fd<Fd: AsFd>(fd: Fd) -> Self { - Self::new(fd.as_fd().as_raw_fd()) - } - - /// Return the raw byte buffer as a `&str`. - #[inline] - pub fn as_str(&self) -> &str { - // SAFETY: `DecInt` always holds a formatted decimal number, so it's - // always valid UTF-8. - unsafe { core::str::from_utf8_unchecked(self.as_bytes()) } - } - - /// Return the raw byte buffer as a `&CStr`. - #[inline] - pub fn as_c_str(&self) -> &CStr { - let bytes_with_nul = &self.buf[..=self.len]; - debug_assert!(CStr::from_bytes_with_nul(bytes_with_nul).is_ok()); - - // SAFETY: `self.buf` holds a single decimal ASCII representation and - // at least one extra NUL byte. - unsafe { CStr::from_bytes_with_nul_unchecked(bytes_with_nul) } - } - - /// Return the raw byte buffer. - #[inline] - pub fn as_bytes(&self) -> &[u8] { - &self.buf[..self.len] - } -} - -struct DecIntWriter(DecInt); - -impl core::fmt::Write for DecIntWriter { - #[inline] - fn write_str(&mut self, s: &str) -> core::fmt::Result { - match self.0.buf.get_mut(self.0.len..self.0.len + s.len()) { - Some(slice) => { - slice.copy_from_slice(s.as_bytes()); - self.0.len += s.len(); - Ok(()) - } - None => Err(core::fmt::Error), - } - } -} - -#[cfg(feature = "std")] -impl AsRef<Path> for DecInt { - #[inline] - fn as_ref(&self) -> &Path { - let as_os_str: &OsStr = OsStrExt::from_bytes(&self.buf[..self.len]); - Path::new(as_os_str) - } -} - -#[cfg(feature = "std")] -impl fmt::Debug for DecInt { - fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { - self.as_str().fmt(fmt) - } -} |