diff --git a/buffered/bufreader.rs b/buffered/bufreader.rs index 02b0fc0..fe6e4af 100644 --- a/buffered/bufreader.rs +++ b/buffered/bufreader.rs @@ -1,8 +1,9 @@ -use crate::cmp; -use crate::fmt; +use core::cmp; +use core::fmt; use crate::io::{ self, BufRead, Initializer, IoSliceMut, Read, Seek, SeekFrom, SizeHint, DEFAULT_BUF_SIZE, }; +use crate::io::prelude::*; /// The `BufReader` struct adds buffering to any reader. /// @@ -44,7 +45,6 @@ use crate::io::{ /// Ok(()) /// } /// ``` -#[stable(feature = "rust1", since = "1.0.0")] pub struct BufReader { inner: R, buf: Box<[u8]>, @@ -68,7 +68,6 @@ impl BufReader { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn new(inner: R) -> BufReader { BufReader::with_capacity(DEFAULT_BUF_SIZE, inner) } @@ -89,7 +88,6 @@ impl BufReader { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn with_capacity(capacity: usize, inner: R) -> BufReader { unsafe { let mut buf = Box::new_uninit_slice(capacity).assume_init(); @@ -118,7 +116,6 @@ impl BufReader { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn get_ref(&self) -> &R { &self.inner } @@ -141,7 +138,6 @@ impl BufReader { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn get_mut(&mut self) -> &mut R { &mut self.inner } @@ -169,7 +165,6 @@ impl BufReader { /// Ok(()) /// } /// ``` - #[stable(feature = "bufreader_buffer", since = "1.37.0")] pub fn buffer(&self) -> &[u8] { &self.buf[self.pos..self.cap] } @@ -192,7 +187,6 @@ impl BufReader { /// Ok(()) /// } /// ``` - #[stable(feature = "buffered_io_capacity", since = "1.46.0")] pub fn capacity(&self) -> usize { self.buf.len() } @@ -216,7 +210,6 @@ impl BufReader { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn into_inner(self) -> R { self.inner } @@ -234,7 +227,6 @@ impl BufReader { /// the buffer will not be flushed, allowing for more efficient seeks. /// This method does not return the location of the underlying reader, so the caller /// must track this information themselves if it is required. - #[unstable(feature = "bufreader_seek_relative", issue = "31100")] pub fn seek_relative(&mut self, offset: i64) -> io::Result<()> { let pos = self.pos as u64; if offset < 0 { @@ -254,7 +246,6 @@ impl BufReader { } } -#[stable(feature = "rust1", since = "1.0.0")] impl Read for BufReader { fn read(&mut self, buf: &mut [u8]) -> io::Result { // If we don't have any buffered data and we're doing a massive read @@ -310,7 +301,6 @@ impl Read for BufReader { } } -#[stable(feature = "rust1", since = "1.0.0")] impl BufRead for BufReader { fn fill_buf(&mut self) -> io::Result<&[u8]> { // If we've reached the end of our internal buffer then we need to fetch @@ -330,7 +320,6 @@ impl BufRead for BufReader { } } -#[stable(feature = "rust1", since = "1.0.0")] impl fmt::Debug for BufReader where R: fmt::Debug, @@ -343,7 +332,6 @@ where } } -#[stable(feature = "rust1", since = "1.0.0")] impl Seek for BufReader { /// Seek to an offset, in bytes, in the underlying reader. /// diff --git a/buffered/bufwriter.rs b/buffered/bufwriter.rs index 80f98bb..d11d026 100644 --- a/buffered/bufwriter.rs +++ b/buffered/bufwriter.rs @@ -1,9 +1,9 @@ -use crate::error; -use crate::fmt; +use core::fmt; use crate::io::{ self, Error, ErrorKind, IntoInnerError, IoSlice, Seek, SeekFrom, Write, DEFAULT_BUF_SIZE, }; -use crate::mem; +use core::mem; +use crate::io::prelude::*; /// Wraps a writer and buffers its output. /// @@ -65,7 +65,6 @@ use crate::mem; /// [`TcpStream::write`]: super::super::super::net::TcpStream::write /// [`TcpStream`]: crate::net::TcpStream /// [`flush`]: BufWriter::flush -#[stable(feature = "rust1", since = "1.0.0")] pub struct BufWriter { inner: Option, buf: Vec, @@ -87,7 +86,6 @@ impl BufWriter { /// /// let mut buffer = BufWriter::new(TcpStream::connect("127.0.0.1:34254").unwrap()); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn new(inner: W) -> BufWriter { BufWriter::with_capacity(DEFAULT_BUF_SIZE, inner) } @@ -105,7 +103,6 @@ impl BufWriter { /// let stream = TcpStream::connect("127.0.0.1:34254").unwrap(); /// let mut buffer = BufWriter::with_capacity(100, stream); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn with_capacity(capacity: usize, inner: W) -> BufWriter { BufWriter { inner: Some(inner), buf: Vec::with_capacity(capacity), panicked: false } } @@ -200,7 +197,6 @@ impl BufWriter { /// // we can use reference just like buffer /// let reference = buffer.get_ref(); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn get_ref(&self) -> &W { self.inner.as_ref().unwrap() } @@ -220,7 +216,6 @@ impl BufWriter { /// // we can use reference just like buffer /// let reference = buffer.get_mut(); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn get_mut(&mut self) -> &mut W { self.inner.as_mut().unwrap() } @@ -238,7 +233,6 @@ impl BufWriter { /// // See how many bytes are currently buffered /// let bytes_buffered = buf_writer.buffer().len(); /// ``` - #[stable(feature = "bufreader_buffer", since = "1.37.0")] pub fn buffer(&self) -> &[u8] { &self.buf } @@ -270,7 +264,6 @@ impl BufWriter { /// // Calculate how many bytes can be written without flushing /// let without_flush = capacity - buf_writer.buffer().len(); /// ``` - #[stable(feature = "buffered_io_capacity", since = "1.46.0")] pub fn capacity(&self) -> usize { self.buf.capacity() } @@ -294,7 +287,6 @@ impl BufWriter { /// // unwrap the TcpStream and flush the buffer /// let stream = buffer.into_inner().unwrap(); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn into_inner(mut self) -> Result>> { match self.flush_buf() { Err(e) => Err(IntoInnerError::new(self, e)), @@ -325,7 +317,6 @@ impl BufWriter { /// assert_eq!(recovered_writer.len(), 0); /// assert_eq!(&buffered_data.unwrap(), b"ata"); /// ``` - #[unstable(feature = "bufwriter_into_raw_parts", issue = "80690")] pub fn into_raw_parts(mut self) -> (W, Result, WriterPanicked>) { let buf = mem::take(&mut self.buf); let buf = if !self.panicked { Ok(buf) } else { Err(WriterPanicked { buf }) }; @@ -333,7 +324,6 @@ impl BufWriter { } } -#[unstable(feature = "bufwriter_into_raw_parts", issue = "80690")] /// Error returned for the buffered data from `BufWriter::into_raw_parts`, when the underlying /// writer has previously panicked. Contains the (possibly partly written) buffered data. /// @@ -367,7 +357,6 @@ pub struct WriterPanicked { impl WriterPanicked { /// Returns the perhaps-unwritten data. Some of this data may have been written by the /// panicking call(s) to the underlying writer, so simply writing it again is not a good idea. - #[unstable(feature = "bufwriter_into_raw_parts", issue = "80690")] pub fn into_inner(self) -> Vec { self.buf } @@ -376,22 +365,12 @@ impl WriterPanicked { "BufWriter inner writer panicked, what data remains unwritten is not known"; } -#[unstable(feature = "bufwriter_into_raw_parts", issue = "80690")] -impl error::Error for WriterPanicked { - #[allow(deprecated, deprecated_in_future)] - fn description(&self) -> &str { - Self::DESCRIPTION - } -} - -#[unstable(feature = "bufwriter_into_raw_parts", issue = "80690")] impl fmt::Display for WriterPanicked { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "{}", Self::DESCRIPTION) } } -#[unstable(feature = "bufwriter_into_raw_parts", issue = "80690")] impl fmt::Debug for WriterPanicked { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.debug_struct("WriterPanicked") @@ -400,7 +379,6 @@ impl fmt::Debug for WriterPanicked { } } -#[stable(feature = "rust1", since = "1.0.0")] impl Write for BufWriter { fn write(&mut self, buf: &[u8]) -> io::Result { if self.buf.len() + buf.len() > self.buf.capacity() { @@ -497,7 +475,6 @@ impl Write for BufWriter { } } -#[stable(feature = "rust1", since = "1.0.0")] impl fmt::Debug for BufWriter where W: fmt::Debug, @@ -510,7 +487,6 @@ where } } -#[stable(feature = "rust1", since = "1.0.0")] impl Seek for BufWriter { /// Seek to the offset, in bytes, in the underlying writer. /// @@ -521,7 +497,6 @@ impl Seek for BufWriter { } } -#[stable(feature = "rust1", since = "1.0.0")] impl Drop for BufWriter { fn drop(&mut self) { if self.inner.is_some() && !self.panicked { diff --git a/buffered/linewriter.rs b/buffered/linewriter.rs index d7b620d..1804305 100644 --- a/buffered/linewriter.rs +++ b/buffered/linewriter.rs @@ -1,4 +1,4 @@ -use crate::fmt; +use core::fmt; use crate::io::{self, buffered::LineWriterShim, BufWriter, IntoInnerError, IoSlice, Write}; /// Wraps a writer and buffers output to it, flushing whenever a newline @@ -63,7 +63,6 @@ use crate::io::{self, buffered::LineWriterShim, BufWriter, IntoInnerError, IoSli /// Ok(()) /// } /// ``` -#[stable(feature = "rust1", since = "1.0.0")] pub struct LineWriter { inner: BufWriter, } @@ -83,7 +82,6 @@ impl LineWriter { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn new(inner: W) -> LineWriter { // Lines typically aren't that long, don't use a giant buffer LineWriter::with_capacity(1024, inner) @@ -104,7 +102,6 @@ impl LineWriter { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn with_capacity(capacity: usize, inner: W) -> LineWriter { LineWriter { inner: BufWriter::with_capacity(capacity, inner) } } @@ -125,7 +122,6 @@ impl LineWriter { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn get_ref(&self) -> &W { self.inner.get_ref() } @@ -150,7 +146,6 @@ impl LineWriter { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn get_mut(&mut self) -> &mut W { self.inner.get_mut() } @@ -178,13 +173,11 @@ impl LineWriter { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn into_inner(self) -> Result>> { self.inner.into_inner().map_err(|err| err.new_wrapped(|inner| LineWriter { inner })) } } -#[stable(feature = "rust1", since = "1.0.0")] impl Write for LineWriter { fn write(&mut self, buf: &[u8]) -> io::Result { LineWriterShim::new(&mut self.inner).write(buf) @@ -215,7 +208,6 @@ impl Write for LineWriter { } } -#[stable(feature = "rust1", since = "1.0.0")] impl fmt::Debug for LineWriter where W: fmt::Debug, diff --git a/buffered/linewritershim.rs b/buffered/linewritershim.rs index d0c859d..a052adf 100644 --- a/buffered/linewritershim.rs +++ b/buffered/linewritershim.rs @@ -1,5 +1,5 @@ use crate::io::{self, BufWriter, IoSlice, Write}; -use crate::memchr; +use crate::io::memchr; /// Private helper struct for implementing the line-buffered writing logic. /// This shim temporarily wraps a BufWriter, and uses its internals to diff --git a/buffered/mod.rs b/buffered/mod.rs index 6549781..0dc7440 100644 --- a/buffered/mod.rs +++ b/buffered/mod.rs @@ -8,14 +8,13 @@ mod linewritershim; #[cfg(test)] mod tests; -use crate::error; -use crate::fmt; +use core::fmt; use crate::io::Error; -pub use bufreader::BufReader; -pub use bufwriter::BufWriter; -pub use linewriter::LineWriter; -use linewritershim::LineWriterShim; +pub use self::bufreader::BufReader; +pub use self::bufwriter::BufWriter; +pub use self::linewriter::LineWriter; +use self::linewritershim::LineWriterShim; /// An error returned by [`BufWriter::into_inner`] which combines an error that /// happened while writing out the buffer, and the buffered writer object @@ -42,7 +41,6 @@ use linewritershim::LineWriterShim; /// }; /// ``` #[derive(Debug)] -#[stable(feature = "rust1", since = "1.0.0")] pub struct IntoInnerError(W, Error); impl IntoInnerError { @@ -87,7 +85,6 @@ impl IntoInnerError { /// } /// }; /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn error(&self) -> &Error { &self.1 } @@ -122,7 +119,6 @@ impl IntoInnerError { /// } /// }; /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn into_inner(self) -> W { self.0 } @@ -143,7 +139,6 @@ impl IntoInnerError { /// let err = into_inner_err.into_error(); /// assert_eq!(err.kind(), ErrorKind::WriteZero); /// ``` - #[unstable(feature = "io_into_inner_error_parts", issue = "79704")] pub fn into_error(self) -> Error { self.1 } @@ -167,28 +162,17 @@ impl IntoInnerError { /// assert_eq!(err.kind(), ErrorKind::WriteZero); /// assert_eq!(recovered_writer.buffer(), b"t be actually written"); /// ``` - #[unstable(feature = "io_into_inner_error_parts", issue = "79704")] pub fn into_parts(self) -> (Error, W) { (self.1, self.0) } } -#[stable(feature = "rust1", since = "1.0.0")] impl From> for Error { fn from(iie: IntoInnerError) -> Error { iie.1 } } -#[stable(feature = "rust1", since = "1.0.0")] -impl error::Error for IntoInnerError { - #[allow(deprecated, deprecated_in_future)] - fn description(&self) -> &str { - error::Error::description(self.error()) - } -} - -#[stable(feature = "rust1", since = "1.0.0")] impl fmt::Display for IntoInnerError { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { self.error().fmt(f) diff --git a/copy.rs b/copy.rs index eb60df2..df99a47 100644 --- a/copy.rs +++ b/copy.rs @@ -1,5 +1,6 @@ -use super::{BufWriter, ErrorKind, Read, Result, Write, DEFAULT_BUF_SIZE}; -use crate::mem::MaybeUninit; +use super::{ErrorKind, Read, Result, Write, DEFAULT_BUF_SIZE}; +#[cfg(feature = "collections")] use super::BufWriter; +use core::mem::MaybeUninit; /// Copies the entire contents of a reader into a writer. /// @@ -39,19 +40,12 @@ use crate::mem::MaybeUninit; /// Ok(()) /// } /// ``` -#[stable(feature = "rust1", since = "1.0.0")] pub fn copy(reader: &mut R, writer: &mut W) -> Result where R: Read, W: Write, { - cfg_if::cfg_if! { - if #[cfg(any(target_os = "linux", target_os = "android"))] { - crate::sys::kernel_copy::copy_spec(reader, writer) - } else { - generic_copy(reader, writer) - } - } + generic_copy(reader, writer) } /// The userspace read-write-loop implementation of `io::copy` that is used when @@ -76,6 +70,7 @@ impl BufferedCopySpec for W { } } +#[cfg(feature = "collections")] impl BufferedCopySpec for BufWriter { fn copy_to(reader: &mut R, writer: &mut Self) -> Result { if writer.capacity() < DEFAULT_BUF_SIZE { diff --git a/cursor.rs b/cursor.rs index 9021b47..49ebb05 100644 --- a/cursor.rs +++ b/cursor.rs @@ -3,10 +3,10 @@ mod tests; use crate::io::prelude::*; -use crate::cmp; +use core::cmp; use crate::io::{self, Error, ErrorKind, Initializer, IoSlice, IoSliceMut, SeekFrom}; -use core::convert::TryInto; +#[cfg(feature="collections")] use core::convert::TryInto; /// A `Cursor` wraps an in-memory buffer and provides it with a /// [`Seek`] implementation. @@ -70,7 +70,6 @@ use core::convert::TryInto; /// assert_eq!(&buff.get_ref()[5..15], &[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]); /// } /// ``` -#[stable(feature = "rust1", since = "1.0.0")] #[derive(Clone, Debug, Default, Eq, PartialEq)] pub struct Cursor { inner: T, @@ -93,8 +92,6 @@ impl Cursor { /// # fn force_inference(_: &Cursor>) {} /// # force_inference(&buff); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] - #[rustc_const_unstable(feature = "const_io_structs", issue = "78812")] pub const fn new(inner: T) -> Cursor { Cursor { pos: 0, inner } } @@ -112,7 +109,6 @@ impl Cursor { /// /// let vec = buff.into_inner(); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn into_inner(self) -> T { self.inner } @@ -130,8 +126,6 @@ impl Cursor { /// /// let reference = buff.get_ref(); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] - #[rustc_const_unstable(feature = "const_io_structs", issue = "78812")] pub const fn get_ref(&self) -> &T { &self.inner } @@ -152,7 +146,6 @@ impl Cursor { /// /// let reference = buff.get_mut(); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn get_mut(&mut self) -> &mut T { &mut self.inner } @@ -176,8 +169,6 @@ impl Cursor { /// buff.seek(SeekFrom::Current(-1)).unwrap(); /// assert_eq!(buff.position(), 1); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] - #[rustc_const_unstable(feature = "const_io_structs", issue = "78812")] pub const fn position(&self) -> u64 { self.pos } @@ -199,13 +190,11 @@ impl Cursor { /// buff.set_position(4); /// assert_eq!(buff.position(), 4); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn set_position(&mut self, pos: u64) { self.pos = pos; } } -#[stable(feature = "rust1", since = "1.0.0")] impl io::Seek for Cursor where T: AsRef<[u8]>, @@ -245,13 +234,12 @@ where } } -#[stable(feature = "rust1", since = "1.0.0")] impl Read for Cursor where T: AsRef<[u8]>, { fn read(&mut self, buf: &mut [u8]) -> io::Result { - let n = Read::read(&mut self.fill_buf()?, buf)?; + let n = Read::read(&mut self.get_buf()?, buf)?; self.pos += n as u64; Ok(n) } @@ -274,7 +262,7 @@ where fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> { let n = buf.len(); - Read::read_exact(&mut self.fill_buf()?, buf)?; + Read::read_exact(&mut self.get_buf()?, buf)?; self.pos += n as u64; Ok(()) } @@ -285,15 +273,24 @@ where } } -#[stable(feature = "rust1", since = "1.0.0")] -impl BufRead for Cursor +impl Cursor where T: AsRef<[u8]>, { - fn fill_buf(&mut self) -> io::Result<&[u8]> { + fn get_buf(&mut self) -> io::Result<&[u8]> { let amt = cmp::min(self.pos, self.inner.as_ref().len() as u64); Ok(&self.inner.as_ref()[(amt as usize)..]) } +} + +#[cfg(feature="collections")] +impl BufRead for Cursor +where + T: AsRef<[u8]>, +{ + fn fill_buf(&mut self) -> io::Result<&[u8]> { + self.get_buf() + } fn consume(&mut self, amt: usize) { self.pos += amt as u64; } @@ -326,6 +323,7 @@ fn slice_write_vectored( } // Resizing write implementation +#[cfg(feature="collections")] fn vec_write(pos_mut: &mut u64, vec: &mut Vec, buf: &[u8]) -> io::Result { let pos: usize = (*pos_mut).try_into().map_err(|_| { Error::new_const( @@ -354,6 +352,7 @@ fn vec_write(pos_mut: &mut u64, vec: &mut Vec, buf: &[u8]) -> io::Result, @@ -366,7 +365,6 @@ fn vec_write_vectored( Ok(nwritten) } -#[stable(feature = "rust1", since = "1.0.0")] impl Write for Cursor<&mut [u8]> { #[inline] fn write(&mut self, buf: &[u8]) -> io::Result { @@ -389,7 +387,7 @@ impl Write for Cursor<&mut [u8]> { } } -#[stable(feature = "cursor_mut_vec", since = "1.25.0")] +#[cfg(feature="collections")] impl Write for Cursor<&mut Vec> { fn write(&mut self, buf: &[u8]) -> io::Result { vec_write(&mut self.pos, self.inner, buf) @@ -410,7 +408,7 @@ impl Write for Cursor<&mut Vec> { } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature = "collections")] impl Write for Cursor> { fn write(&mut self, buf: &[u8]) -> io::Result { vec_write(&mut self.pos, &mut self.inner, buf) @@ -431,8 +429,8 @@ impl Write for Cursor> { } } -#[stable(feature = "cursor_box_slice", since = "1.5.0")] -impl Write for Cursor> { +#[cfg(feature = "alloc")] +impl Write for Cursor<::alloc::boxed::Box<[u8]>> { #[inline] fn write(&mut self, buf: &[u8]) -> io::Result { slice_write(&mut self.pos, &mut self.inner, buf) diff --git a/error.rs b/error.rs index 97c92aa..2dd6c9b 100644 --- a/error.rs +++ b/error.rs @@ -1,11 +1,17 @@ #[cfg(test)] mod tests; -use crate::convert::From; -use crate::error; -use crate::fmt; -use crate::result; -use crate::sys; +use core::convert::From; +use core::fmt; +use core::result; + +use core::convert::Into; +use core::marker::{Send, Sync}; +use core::option::Option::{self, Some, None}; +#[cfg(feature="alloc")] use alloc::boxed::Box; +#[cfg(not(feature="alloc"))] use ::FakeBox as Box; +#[cfg(feature="collections")] use collections::string::String; +#[cfg(not(feature="collections"))] use ::ErrorString as String; /// A specialized [`Result`] type for I/O operations. /// @@ -41,7 +47,6 @@ use crate::sys; /// Ok(buffer) /// } /// ``` -#[stable(feature = "rust1", since = "1.0.0")] pub type Result = result::Result; /// The error type for I/O operations of the [`Read`], [`Write`], [`Seek`], and @@ -54,12 +59,10 @@ pub type Result = result::Result; /// [`Read`]: crate::io::Read /// [`Write`]: crate::io::Write /// [`Seek`]: crate::io::Seek -#[stable(feature = "rust1", since = "1.0.0")] pub struct Error { repr: Repr, } -#[stable(feature = "rust1", since = "1.0.0")] impl fmt::Debug for Error { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::Debug::fmt(&self.repr, f) @@ -71,13 +74,16 @@ enum Repr { Simple(ErrorKind), // &str is a fat pointer, but &&str is a thin pointer. SimpleMessage(ErrorKind, &'static &'static str), + #[cfg(feature="alloc")] Custom(Box), + #[cfg(not(feature="alloc"))] + Custom(Custom), } #[derive(Debug)] struct Custom { kind: ErrorKind, - error: Box, + error: String, } /// A list specifying general categories of I/O error. @@ -89,48 +95,35 @@ struct Custom { /// /// [`io::Error`]: Error #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)] -#[stable(feature = "rust1", since = "1.0.0")] #[allow(deprecated)] #[non_exhaustive] pub enum ErrorKind { /// An entity was not found, often a file. - #[stable(feature = "rust1", since = "1.0.0")] NotFound, /// The operation lacked the necessary privileges to complete. - #[stable(feature = "rust1", since = "1.0.0")] PermissionDenied, /// The connection was refused by the remote server. - #[stable(feature = "rust1", since = "1.0.0")] ConnectionRefused, /// The connection was reset by the remote server. - #[stable(feature = "rust1", since = "1.0.0")] ConnectionReset, /// The connection was aborted (terminated) by the remote server. - #[stable(feature = "rust1", since = "1.0.0")] ConnectionAborted, /// The network operation failed because it was not connected yet. - #[stable(feature = "rust1", since = "1.0.0")] NotConnected, /// A socket address could not be bound because the address is already in /// use elsewhere. - #[stable(feature = "rust1", since = "1.0.0")] AddrInUse, /// A nonexistent interface was requested or the requested address was not /// local. - #[stable(feature = "rust1", since = "1.0.0")] AddrNotAvailable, /// The operation failed because a pipe was closed. - #[stable(feature = "rust1", since = "1.0.0")] BrokenPipe, /// An entity already exists, often a file. - #[stable(feature = "rust1", since = "1.0.0")] AlreadyExists, /// The operation needs to block to complete, but the blocking operation was /// requested to not occur. - #[stable(feature = "rust1", since = "1.0.0")] WouldBlock, /// A parameter was incorrect. - #[stable(feature = "rust1", since = "1.0.0")] InvalidInput, /// Data not valid for the operation were encountered. /// @@ -142,10 +135,8 @@ pub enum ErrorKind { /// `InvalidData` if the file's contents are not valid UTF-8. /// /// [`InvalidInput`]: ErrorKind::InvalidInput - #[stable(feature = "io_invalid_data", since = "1.2.0")] InvalidData, /// The I/O operation's timeout expired, causing it to be canceled. - #[stable(feature = "rust1", since = "1.0.0")] TimedOut, /// An error returned when an operation could not be completed because a /// call to [`write`] returned [`Ok(0)`]. @@ -156,12 +147,10 @@ pub enum ErrorKind { /// /// [`write`]: crate::io::Write::write /// [`Ok(0)`]: Ok - #[stable(feature = "rust1", since = "1.0.0")] WriteZero, /// This operation was interrupted. /// /// Interrupted operations can typically be retried. - #[stable(feature = "rust1", since = "1.0.0")] Interrupted, /// Any I/O error not part of this list. /// @@ -169,7 +158,6 @@ pub enum ErrorKind { /// [`ErrorKind`] variant in the future. It is not recommended to match /// an error against `Other` and to expect any additional characteristics, /// e.g., a specific [`Error::raw_os_error`] return value. - #[stable(feature = "rust1", since = "1.0.0")] Other, /// An error returned when an operation could not be completed because an @@ -178,7 +166,6 @@ pub enum ErrorKind { /// This typically means that an operation could only succeed if it read a /// particular number of bytes but only a smaller number of bytes could be /// read. - #[stable(feature = "read_exact", since = "1.6.0")] UnexpectedEof, } @@ -209,7 +196,6 @@ impl ErrorKind { /// Intended for use for errors not exposed to the user, where allocating onto /// the heap (for normal construction via Error::new) is too costly. -#[stable(feature = "io_error_from_errorkind", since = "1.14.0")] impl From for Error { /// Converts an [`ErrorKind`] into an [`Error`]. /// @@ -249,15 +235,14 @@ impl Error { /// // errors can also be created from other errors /// let custom_error2 = Error::new(ErrorKind::Interrupted, custom_error); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn new(kind: ErrorKind, error: E) -> Error where - E: Into>, + E: Into, { Self::_new(kind, error.into()) } - fn _new(kind: ErrorKind, error: Box) -> Error { + fn _new(kind: ErrorKind, error: String) -> Error { Error { repr: Repr::Custom(Box::new(Custom { kind, error })) } } @@ -274,25 +259,6 @@ impl Error { Self { repr: Repr::SimpleMessage(kind, message) } } - /// Returns an error representing the last OS error which occurred. - /// - /// This function reads the value of `errno` for the target platform (e.g. - /// `GetLastError` on Windows) and will return a corresponding instance of - /// [`Error`] for the error code. - /// - /// # Examples - /// - /// ``` - /// use std::io::Error; - /// - /// println!("last OS error: {:?}", Error::last_os_error()); - /// ``` - #[stable(feature = "rust1", since = "1.0.0")] - #[inline] - pub fn last_os_error() -> Error { - Error::from_raw_os_error(sys::os::errno() as i32) - } - /// Creates a new instance of an [`Error`] from a particular OS error code. /// /// # Examples @@ -318,7 +284,6 @@ impl Error { /// assert_eq!(error.kind(), io::ErrorKind::InvalidInput); /// # } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] #[inline] pub fn from_raw_os_error(code: i32) -> Error { Error { repr: Repr::Os(code) } @@ -353,7 +318,6 @@ impl Error { /// print_os_error(&Error::new(ErrorKind::Other, "oh no!")); /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] #[inline] pub fn raw_os_error(&self) -> Option { match self.repr { @@ -391,14 +355,13 @@ impl Error { /// print_error(&Error::new(ErrorKind::Other, "oh no!")); /// } /// ``` - #[stable(feature = "io_error_inner", since = "1.3.0")] #[inline] - pub fn get_ref(&self) -> Option<&(dyn error::Error + Send + Sync + 'static)> { + pub fn get_ref(&self) -> Option<&String> { match self.repr { Repr::Os(..) => None, Repr::Simple(..) => None, Repr::SimpleMessage(..) => None, - Repr::Custom(ref c) => Some(&*c.error), + Repr::Custom(ref c) => Some(&c.error), } } @@ -464,14 +427,13 @@ impl Error { /// print_error(&change_error(Error::new(ErrorKind::Other, MyError::new()))); /// } /// ``` - #[stable(feature = "io_error_inner", since = "1.3.0")] #[inline] - pub fn get_mut(&mut self) -> Option<&mut (dyn error::Error + Send + Sync + 'static)> { + pub fn get_mut(&mut self) -> Option<&mut String> { match self.repr { Repr::Os(..) => None, Repr::Simple(..) => None, Repr::SimpleMessage(..) => None, - Repr::Custom(ref mut c) => Some(&mut *c.error), + Repr::Custom(ref mut c) => Some(&mut c.error), } } @@ -502,9 +464,8 @@ impl Error { /// print_error(Error::new(ErrorKind::Other, "oh no!")); /// } /// ``` - #[stable(feature = "io_error_inner", since = "1.3.0")] #[inline] - pub fn into_inner(self) -> Option> { + pub fn into_inner(self) -> Option { match self.repr { Repr::Os(..) => None, Repr::Simple(..) => None, @@ -531,11 +492,10 @@ impl Error { /// print_error(Error::new(ErrorKind::AddrInUse, "oh no!")); /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] #[inline] pub fn kind(&self) -> ErrorKind { match self.repr { - Repr::Os(code) => sys::decode_error_kind(code), + Repr::Os(_code) => ErrorKind::Other, Repr::Custom(ref c) => c.kind, Repr::Simple(kind) => kind, Repr::SimpleMessage(kind, _) => kind, @@ -549,8 +509,6 @@ impl fmt::Debug for Repr { Repr::Os(code) => fmt .debug_struct("Os") .field("code", &code) - .field("kind", &sys::decode_error_kind(code)) - .field("message", &sys::os::error_string(code)) .finish(), Repr::Custom(ref c) => fmt::Debug::fmt(&c, fmt), Repr::Simple(kind) => fmt.debug_tuple("Kind").field(&kind).finish(), @@ -561,13 +519,11 @@ impl fmt::Debug for Repr { } } -#[stable(feature = "rust1", since = "1.0.0")] impl fmt::Display for Error { fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { match self.repr { Repr::Os(code) => { - let detail = sys::os::error_string(code); - write!(fmt, "{} (os error {})", detail, code) + write!(fmt, "os error {}", code) } Repr::Custom(ref c) => c.error.fmt(fmt), Repr::Simple(kind) => write!(fmt, "{}", kind.as_str()), @@ -576,37 +532,6 @@ impl fmt::Display for Error { } } -#[stable(feature = "rust1", since = "1.0.0")] -impl error::Error for Error { - #[allow(deprecated, deprecated_in_future)] - fn description(&self) -> &str { - match self.repr { - Repr::Os(..) | Repr::Simple(..) => self.kind().as_str(), - Repr::SimpleMessage(_, &msg) => msg, - Repr::Custom(ref c) => c.error.description(), - } - } - - #[allow(deprecated)] - fn cause(&self) -> Option<&dyn error::Error> { - match self.repr { - Repr::Os(..) => None, - Repr::Simple(..) => None, - Repr::SimpleMessage(..) => None, - Repr::Custom(ref c) => c.error.cause(), - } - } - - fn source(&self) -> Option<&(dyn error::Error + 'static)> { - match self.repr { - Repr::Os(..) => None, - Repr::Simple(..) => None, - Repr::SimpleMessage(..) => None, - Repr::Custom(ref c) => c.error.source(), - } - } -} - fn _assert_error_is_sync_send() { fn _is_sync_send() {} _is_sync_send::(); diff --git a/impls.rs b/impls.rs index 6891bd8..22b2b02 100644 --- a/impls.rs +++ b/impls.rs @@ -1,18 +1,22 @@ #[cfg(test)] mod tests; -use crate::alloc::Allocator; -use crate::cmp; -use crate::fmt; +#[cfg(feature="collections")] use core::alloc::Allocator; +use core::cmp; +use core::fmt; use crate::io::{ - self, BufRead, Error, ErrorKind, Initializer, IoSlice, IoSliceMut, Read, Seek, SeekFrom, Write, + self, Error, ErrorKind, Initializer, IoSlice, IoSliceMut, Read, Seek, SeekFrom, Write, }; -use crate::mem; +#[cfg(feature="collections")] use crate::io::BufRead; +use core::mem; + +#[cfg(feature="alloc")] use alloc::boxed::Box; +#[cfg(feature="collections")] use collections::string::String; +#[cfg(feature="collections")] use collections::vec::Vec; // ============================================================================= // Forwarding implementations -#[stable(feature = "rust1", since = "1.0.0")] impl Read for &mut R { #[inline] fn read(&mut self, buf: &mut [u8]) -> io::Result { @@ -34,11 +38,13 @@ impl Read for &mut R { (**self).initializer() } + #[cfg(feature="collections")] #[inline] fn read_to_end(&mut self, buf: &mut Vec) -> io::Result { (**self).read_to_end(buf) } + #[cfg(feature="collections")] #[inline] fn read_to_string(&mut self, buf: &mut String) -> io::Result { (**self).read_to_string(buf) @@ -49,7 +55,6 @@ impl Read for &mut R { (**self).read_exact(buf) } } -#[stable(feature = "rust1", since = "1.0.0")] impl Write for &mut W { #[inline] fn write(&mut self, buf: &[u8]) -> io::Result { @@ -81,14 +86,13 @@ impl Write for &mut W { (**self).write_fmt(fmt) } } -#[stable(feature = "rust1", since = "1.0.0")] impl Seek for &mut S { #[inline] fn seek(&mut self, pos: SeekFrom) -> io::Result { (**self).seek(pos) } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] impl BufRead for &mut B { #[inline] fn fill_buf(&mut self) -> io::Result<&[u8]> { @@ -111,7 +115,7 @@ impl BufRead for &mut B { } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="alloc")] impl Read for Box { #[inline] fn read(&mut self, buf: &mut [u8]) -> io::Result { @@ -133,11 +137,13 @@ impl Read for Box { (**self).initializer() } + #[cfg(feature="collections")] #[inline] fn read_to_end(&mut self, buf: &mut Vec) -> io::Result { (**self).read_to_end(buf) } + #[cfg(feature="collections")] #[inline] fn read_to_string(&mut self, buf: &mut String) -> io::Result { (**self).read_to_string(buf) @@ -148,7 +154,7 @@ impl Read for Box { (**self).read_exact(buf) } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="alloc")] impl Write for Box { #[inline] fn write(&mut self, buf: &[u8]) -> io::Result { @@ -180,14 +186,14 @@ impl Write for Box { (**self).write_fmt(fmt) } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="alloc")] impl Seek for Box { #[inline] fn seek(&mut self, pos: SeekFrom) -> io::Result { (**self).seek(pos) } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] impl BufRead for Box { #[inline] fn fill_buf(&mut self) -> io::Result<&[u8]> { @@ -217,7 +223,6 @@ impl BufRead for Box { /// /// Note that reading updates the slice to point to the yet unread part. /// The slice will be empty when EOF is reached. -#[stable(feature = "rust1", since = "1.0.0")] impl Read for &[u8] { #[inline] fn read(&mut self, buf: &mut [u8]) -> io::Result { @@ -280,6 +285,7 @@ impl Read for &[u8] { Ok(()) } + #[cfg(feature="collections")] #[inline] fn read_to_end(&mut self, buf: &mut Vec) -> io::Result { buf.extend_from_slice(*self); @@ -289,7 +295,7 @@ impl Read for &[u8] { } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] impl BufRead for &[u8] { #[inline] fn fill_buf(&mut self) -> io::Result<&[u8]> { @@ -311,7 +317,6 @@ impl BufRead for &[u8] { /// If the number of bytes to be written exceeds the size of the slice, write operations will /// return short writes: ultimately, `Ok(0)`; in this situation, `write_all` returns an error of /// kind `ErrorKind::WriteZero`. -#[stable(feature = "rust1", since = "1.0.0")] impl Write for &mut [u8] { #[inline] fn write(&mut self, data: &[u8]) -> io::Result { @@ -357,7 +362,7 @@ impl Write for &mut [u8] { /// Write is implemented for `Vec` by appending to the vector. /// The vector will grow as needed. -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] impl Write for Vec { #[inline] fn write(&mut self, buf: &[u8]) -> io::Result { diff --git a/mod.rs b/mod.rs index 9953bcd..700f624 100644 --- a/mod.rs +++ b/mod.rs @@ -246,58 +246,48 @@ //! [`Result`]: crate::result::Result //! [`.unwrap()`]: crate::result::Result::unwrap -#![stable(feature = "rust1", since = "1.0.0")] - #[cfg(test)] mod tests; -use crate::cmp; -use crate::fmt; -use crate::memchr; -use crate::ops::{Deref, DerefMut}; -use crate::ptr; -use crate::slice; -use crate::str; -use crate::sys; - -#[stable(feature = "rust1", since = "1.0.0")] -pub use self::buffered::IntoInnerError; -#[stable(feature = "rust1", since = "1.0.0")] -pub use self::buffered::{BufReader, BufWriter, LineWriter}; -#[stable(feature = "rust1", since = "1.0.0")] +use core::cmp; +use core::fmt; +#[cfg(not(core_memchr))] +mod memchr; +#[cfg(all(feature="collections",core_memchr))] +use core::slice::memchr; +use core::ops::{Deref, DerefMut}; +use core::ptr; +use core::slice; +use core::str; + +#[cfg(feature="collections")] pub use self::buffered::IntoInnerError; +#[cfg(feature="collections")] pub use self::buffered::{BufReader, BufWriter, LineWriter}; + pub use self::copy::copy; -#[stable(feature = "rust1", since = "1.0.0")] pub use self::cursor::Cursor; -#[stable(feature = "rust1", since = "1.0.0")] pub use self::error::{Error, ErrorKind, Result}; -#[unstable(feature = "internal_output_capture", issue = "none")] -#[doc(no_inline, hidden)] -pub use self::stdio::set_output_capture; -#[stable(feature = "rust1", since = "1.0.0")] -pub use self::stdio::{stderr, stdin, stdout, Stderr, Stdin, Stdout}; -#[stable(feature = "rust1", since = "1.0.0")] -pub use self::stdio::{StderrLock, StdinLock, StdoutLock}; -#[unstable(feature = "print_internals", issue = "none")] -pub use self::stdio::{_eprint, _print}; -#[stable(feature = "rust1", since = "1.0.0")] pub use self::util::{empty, repeat, sink, Empty, Repeat, Sink}; -mod buffered; +#[cfg(feature="collections")] use collections::string::String; +#[cfg(feature="collections")] use collections::vec::Vec; + +#[cfg(feature="collections")] mod buffered; pub(crate) mod copy; mod cursor; mod error; mod impls; pub mod prelude; -mod stdio; mod util; -const DEFAULT_BUF_SIZE: usize = crate::sys_common::io::DEFAULT_BUF_SIZE; +const DEFAULT_BUF_SIZE: usize = 8 * 1024; +#[cfg(feature="collections")] struct Guard<'a> { buf: &'a mut Vec, len: usize, } +#[cfg(feature="collections")] impl Drop for Guard<'_> { fn drop(&mut self) { unsafe { @@ -324,6 +314,7 @@ impl Drop for Guard<'_> { // 2. We're passing a raw buffer to the function `f`, and it is expected that // the function only *appends* bytes to the buffer. We'll get undefined // behavior if existing bytes are overwritten to have non-UTF-8 data. +#[cfg(feature="collections")] fn append_to_string(buf: &mut String, f: F) -> Result where F: FnOnce(&mut Vec) -> Result, @@ -351,10 +342,12 @@ where // // Because we're extending the buffer with uninitialized data for trusted // readers, we need to make sure to truncate that if any of this panics. +#[cfg(feature="collections")] fn read_to_end(r: &mut R, buf: &mut Vec) -> Result { read_to_end_with_reservation(r, buf, |_| 32) } +#[cfg(feature="collections")] fn read_to_end_with_reservation( r: &mut R, buf: &mut Vec, @@ -504,7 +497,6 @@ pub(crate) fn default_read_exact(this: &mut R, mut buf: &mut [ /// [`&str`]: prim@str /// [`std::io`]: self /// [`File`]: crate::fs::File -#[stable(feature = "rust1", since = "1.0.0")] #[doc(spotlight)] pub trait Read { /// Pull some bytes from this source into the specified buffer, returning @@ -580,7 +572,6 @@ pub trait Read { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn read(&mut self, buf: &mut [u8]) -> Result; /// Like `read`, except that it reads into a slice of buffers. @@ -592,7 +583,6 @@ pub trait Read { /// /// The default implementation calls `read` with either the first nonempty /// buffer provided, or an empty one if none exists. - #[stable(feature = "iovec", since = "1.36.0")] fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result { default_read_vectored(|b| self.read(b), bufs) } @@ -605,7 +595,6 @@ pub trait Read { /// and coalesce writes into a single buffer for higher performance. /// /// The default implementation returns `false`. - #[unstable(feature = "can_vector", issue = "69941")] fn is_read_vectored(&self) -> bool { false } @@ -629,7 +618,6 @@ pub trait Read { /// This method is unsafe because a `Read`er could otherwise return a /// non-zeroing `Initializer` from another `Read` type without an `unsafe` /// block. - #[unstable(feature = "read_initializer", issue = "42788")] #[inline] unsafe fn initializer(&self) -> Initializer { Initializer::zeroing() @@ -681,7 +669,7 @@ pub trait Read { /// file.) /// /// [`std::fs::read`]: crate::fs::read - #[stable(feature = "rust1", since = "1.0.0")] + #[cfg(feature="collections")] fn read_to_end(&mut self, buf: &mut Vec) -> Result { read_to_end(self, buf) } @@ -724,7 +712,7 @@ pub trait Read { /// reading from a file.) /// /// [`std::fs::read_to_string`]: crate::fs::read_to_string - #[stable(feature = "rust1", since = "1.0.0")] + #[cfg(feature="collections")] fn read_to_string(&mut self, buf: &mut String) -> Result { // Note that we do *not* call `.read_to_end()` here. We are passing // `&mut Vec` (the raw contents of `buf`) into the `read_to_end` @@ -788,7 +776,6 @@ pub trait Read { /// Ok(()) /// } /// ``` - #[stable(feature = "read_exact", since = "1.6.0")] fn read_exact(&mut self, buf: &mut [u8]) -> Result<()> { default_read_exact(self, buf) } @@ -827,7 +814,6 @@ pub trait Read { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn by_ref(&mut self) -> &mut Self where Self: Sized, @@ -864,7 +850,6 @@ pub trait Read { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn bytes(self) -> Bytes where Self: Sized, @@ -902,7 +887,6 @@ pub trait Read { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn chain(self, next: R) -> Chain where Self: Sized, @@ -941,7 +925,6 @@ pub trait Read { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn take(self, limit: u64) -> Take where Self: Sized, @@ -991,29 +974,71 @@ pub trait Read { /// Ok(()) /// } /// ``` -#[unstable(feature = "io_read_to_string", issue = "80218")] +#[cfg(feature="collections")] pub fn read_to_string(reader: &mut R) -> Result { let mut buf = String::new(); reader.read_to_string(&mut buf)?; Ok(buf) } +#[derive(Copy, Clone)] +pub struct IoVecBuffer<'a>(&'a [u8]); + +impl<'a> IoVecBuffer<'a> { + #[inline] + pub fn new(buf: &'a [u8]) -> IoVecBuffer<'a> { + IoVecBuffer(buf) + } + + #[inline] + pub fn advance(&mut self, n: usize) { + self.0 = &self.0[n..] + } + + #[inline] + pub fn as_slice(&self) -> &[u8] { + self.0 + } +} + +pub struct IoVecMutBuffer<'a>(&'a mut [u8]); + +impl<'a> IoVecMutBuffer<'a> { + #[inline] + pub fn new(buf: &'a mut [u8]) -> IoVecMutBuffer<'a> { + IoVecMutBuffer(buf) + } + + #[inline] + pub fn advance(&mut self, n: usize) { + let slice = core::mem::replace(&mut self.0, &mut []); + let (_, remaining) = slice.split_at_mut(n); + self.0 = remaining; + } + + #[inline] + pub fn as_slice(&self) -> &[u8] { + self.0 + } + + #[inline] + pub fn as_mut_slice(&mut self) -> &mut [u8] { + self.0 + } +} + /// A buffer type used with `Read::read_vectored`. /// /// It is semantically a wrapper around an `&mut [u8]`, but is guaranteed to be /// ABI compatible with the `iovec` type on Unix platforms and `WSABUF` on /// Windows. -#[stable(feature = "iovec", since = "1.36.0")] #[repr(transparent)] -pub struct IoSliceMut<'a>(sys::io::IoSliceMut<'a>); +pub struct IoSliceMut<'a>(IoVecMutBuffer<'a>); -#[stable(feature = "iovec-send-sync", since = "1.44.0")] unsafe impl<'a> Send for IoSliceMut<'a> {} -#[stable(feature = "iovec-send-sync", since = "1.44.0")] unsafe impl<'a> Sync for IoSliceMut<'a> {} -#[stable(feature = "iovec", since = "1.36.0")] impl<'a> fmt::Debug for IoSliceMut<'a> { fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::Debug::fmt(self.0.as_slice(), fmt) @@ -1026,10 +1051,9 @@ impl<'a> IoSliceMut<'a> { /// # Panics /// /// Panics on Windows if the slice is larger than 4GB. - #[stable(feature = "iovec", since = "1.36.0")] #[inline] pub fn new(buf: &'a mut [u8]) -> IoSliceMut<'a> { - IoSliceMut(sys::io::IoSliceMut::new(buf)) + IoSliceMut(IoVecMutBuffer::new(buf)) } /// Advance the internal cursor of the slice. @@ -1064,7 +1088,6 @@ impl<'a> IoSliceMut<'a> { /// assert_eq!(bufs[0].deref(), [2; 14].as_ref()); /// assert_eq!(bufs[1].deref(), [3; 8].as_ref()); /// ``` - #[unstable(feature = "io_slice_advance", issue = "62726")] #[inline] pub fn advance<'b>(bufs: &'b mut [IoSliceMut<'a>], n: usize) -> &'b mut [IoSliceMut<'a>] { // Number of buffers to remove. @@ -1088,7 +1111,6 @@ impl<'a> IoSliceMut<'a> { } } -#[stable(feature = "iovec", since = "1.36.0")] impl<'a> Deref for IoSliceMut<'a> { type Target = [u8]; @@ -1098,7 +1120,6 @@ impl<'a> Deref for IoSliceMut<'a> { } } -#[stable(feature = "iovec", since = "1.36.0")] impl<'a> DerefMut for IoSliceMut<'a> { #[inline] fn deref_mut(&mut self) -> &mut [u8] { @@ -1111,18 +1132,14 @@ impl<'a> DerefMut for IoSliceMut<'a> { /// It is semantically a wrapper around an `&[u8]`, but is guaranteed to be /// ABI compatible with the `iovec` type on Unix platforms and `WSABUF` on /// Windows. -#[stable(feature = "iovec", since = "1.36.0")] #[derive(Copy, Clone)] #[repr(transparent)] -pub struct IoSlice<'a>(sys::io::IoSlice<'a>); +pub struct IoSlice<'a>(IoVecBuffer<'a>); -#[stable(feature = "iovec-send-sync", since = "1.44.0")] unsafe impl<'a> Send for IoSlice<'a> {} -#[stable(feature = "iovec-send-sync", since = "1.44.0")] unsafe impl<'a> Sync for IoSlice<'a> {} -#[stable(feature = "iovec", since = "1.36.0")] impl<'a> fmt::Debug for IoSlice<'a> { fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::Debug::fmt(self.0.as_slice(), fmt) @@ -1135,10 +1152,9 @@ impl<'a> IoSlice<'a> { /// # Panics /// /// Panics on Windows if the slice is larger than 4GB. - #[stable(feature = "iovec", since = "1.36.0")] #[inline] pub fn new(buf: &'a [u8]) -> IoSlice<'a> { - IoSlice(sys::io::IoSlice::new(buf)) + IoSlice(IoVecBuffer::new(buf)) } /// Advance the internal cursor of the slice. @@ -1172,7 +1188,6 @@ impl<'a> IoSlice<'a> { /// bufs = IoSlice::advance(bufs, 10); /// assert_eq!(bufs[0].deref(), [2; 14].as_ref()); /// assert_eq!(bufs[1].deref(), [3; 8].as_ref()); - #[unstable(feature = "io_slice_advance", issue = "62726")] #[inline] pub fn advance<'b>(bufs: &'b mut [IoSlice<'a>], n: usize) -> &'b mut [IoSlice<'a>] { // Number of buffers to remove. @@ -1196,7 +1211,6 @@ impl<'a> IoSlice<'a> { } } -#[stable(feature = "iovec", since = "1.36.0")] impl<'a> Deref for IoSlice<'a> { type Target = [u8]; @@ -1207,13 +1221,11 @@ impl<'a> Deref for IoSlice<'a> { } /// A type used to conditionally initialize buffers passed to `Read` methods. -#[unstable(feature = "read_initializer", issue = "42788")] #[derive(Debug)] pub struct Initializer(bool); impl Initializer { /// Returns a new `Initializer` which will zero out buffers. - #[unstable(feature = "read_initializer", issue = "42788")] #[inline] pub fn zeroing() -> Initializer { Initializer(true) @@ -1227,21 +1239,18 @@ impl Initializer { /// read from buffers passed to `Read` methods, and that the return value of /// the method accurately reflects the number of bytes that have been /// written to the head of the buffer. - #[unstable(feature = "read_initializer", issue = "42788")] #[inline] pub unsafe fn nop() -> Initializer { Initializer(false) } /// Indicates if a buffer should be initialized. - #[unstable(feature = "read_initializer", issue = "42788")] #[inline] pub fn should_initialize(&self) -> bool { self.0 } /// Initializes a buffer if necessary. - #[unstable(feature = "read_initializer", issue = "42788")] #[inline] pub fn initialize(&self, buf: &mut [u8]) { if self.should_initialize() { @@ -1295,7 +1304,6 @@ impl Initializer { /// `write` in a loop until its entire input has been written. /// /// [`write_all`]: Write::write_all -#[stable(feature = "rust1", since = "1.0.0")] #[doc(spotlight)] pub trait Write { /// Write a buffer into this writer, returning how many bytes were written. @@ -1342,7 +1350,6 @@ pub trait Write { /// ``` /// /// [`Ok(n)`]: Ok - #[stable(feature = "rust1", since = "1.0.0")] fn write(&mut self, buf: &[u8]) -> Result; /// Like [`write`], except that it writes from a slice of buffers. @@ -1355,7 +1362,6 @@ pub trait Write { /// buffer provided, or an empty one if none exists. /// /// [`write`]: Write::write - #[stable(feature = "iovec", since = "1.36.0")] fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result { default_write_vectored(|b| self.write(b), bufs) } @@ -1370,7 +1376,6 @@ pub trait Write { /// The default implementation returns `false`. /// /// [`write_vectored`]: Write::write_vectored - #[unstable(feature = "can_vector", issue = "69941")] fn is_write_vectored(&self) -> bool { false } @@ -1398,7 +1403,6 @@ pub trait Write { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn flush(&mut self) -> Result<()>; /// Attempts to write an entire buffer into this writer. @@ -1432,7 +1436,6 @@ pub trait Write { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn write_all(&mut self, mut buf: &[u8]) -> Result<()> { while !buf.is_empty() { match self.write(buf) { @@ -1497,7 +1500,6 @@ pub trait Write { /// assert_eq!(writer, &[1, 2, 3, 4, 5, 6]); /// # Ok(()) } /// ``` - #[unstable(feature = "write_all_vectored", issue = "70436")] fn write_all_vectored(&mut self, mut bufs: &mut [IoSlice<'_>]) -> Result<()> { // Guarantee that bufs is empty if it contains no data, // to avoid calling write_vectored if there is no data to be written. @@ -1553,7 +1555,6 @@ pub trait Write { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn write_fmt(&mut self, fmt: fmt::Arguments<'_>) -> Result<()> { // Create a shim which translates a Write to a fmt::Write and saves // off I/O errors. instead of discarding them @@ -1609,7 +1610,6 @@ pub trait Write { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn by_ref(&mut self) -> &mut Self where Self: Sized, @@ -1644,7 +1644,6 @@ pub trait Write { /// Ok(()) /// } /// ``` -#[stable(feature = "rust1", since = "1.0.0")] pub trait Seek { /// Seek to an offset, in bytes, in a stream. /// @@ -1658,7 +1657,6 @@ pub trait Seek { /// # Errors /// /// Seeking to a negative offset is considered an error. - #[stable(feature = "rust1", since = "1.0.0")] fn seek(&mut self, pos: SeekFrom) -> Result; /// Returns the length of this stream (in bytes). @@ -1695,7 +1693,6 @@ pub trait Seek { /// Ok(()) /// } /// ``` - #[unstable(feature = "seek_stream_len", issue = "59359")] fn stream_len(&mut self) -> Result { let old_pos = self.stream_position()?; let len = self.seek(SeekFrom::End(0))?; @@ -1732,7 +1729,6 @@ pub trait Seek { /// Ok(()) /// } /// ``` - #[stable(feature = "seek_convenience", since = "1.51.0")] fn stream_position(&mut self) -> Result { self.seek(SeekFrom::Current(0)) } @@ -1742,29 +1738,26 @@ pub trait Seek { /// /// It is used by the [`Seek`] trait. #[derive(Copy, PartialEq, Eq, Clone, Debug)] -#[stable(feature = "rust1", since = "1.0.0")] pub enum SeekFrom { /// Sets the offset to the provided number of bytes. - #[stable(feature = "rust1", since = "1.0.0")] - Start(#[stable(feature = "rust1", since = "1.0.0")] u64), + Start(u64), /// Sets the offset to the size of this object plus the specified number of /// bytes. /// /// It is possible to seek beyond the end of an object, but it's an error to /// seek before byte 0. - #[stable(feature = "rust1", since = "1.0.0")] - End(#[stable(feature = "rust1", since = "1.0.0")] i64), + End(i64), /// Sets the offset to the current position plus the specified number of /// bytes. /// /// It is possible to seek beyond the end of an object, but it's an error to /// seek before byte 0. - #[stable(feature = "rust1", since = "1.0.0")] - Current(#[stable(feature = "rust1", since = "1.0.0")] i64), + Current(i64), } +#[cfg(feature="collections")] fn read_until(r: &mut R, delim: u8, buf: &mut Vec) -> Result { let mut read = 0; loop { @@ -1840,7 +1833,7 @@ fn read_until(r: &mut R, delim: u8, buf: &mut Vec) -> R /// Ok(()) /// } /// ``` -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] pub trait BufRead: Read { /// Returns the contents of the internal buffer, filling it with more data /// from the inner reader if it is empty. @@ -1881,7 +1874,6 @@ pub trait BufRead: Read { /// let length = buffer.len(); /// stdin.consume(length); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn fill_buf(&mut self) -> Result<&[u8]>; /// Tells this buffer that `amt` bytes have been consumed from the buffer, @@ -1903,7 +1895,6 @@ pub trait BufRead: Read { /// that method's example includes an example of `consume()`. /// /// [`fill_buf`]: BufRead::fill_buf - #[stable(feature = "rust1", since = "1.0.0")] fn consume(&mut self, amt: usize); /// Read all bytes into `buf` until the delimiter `byte` or EOF is reached. @@ -1960,7 +1951,6 @@ pub trait BufRead: Read { /// assert_eq!(num_bytes, 0); /// assert_eq!(buf, b""); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn read_until(&mut self, byte: u8, buf: &mut Vec) -> Result { read_until(self, byte, buf) } @@ -2023,7 +2013,6 @@ pub trait BufRead: Read { /// assert_eq!(num_bytes, 0); /// assert_eq!(buf, ""); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn read_line(&mut self, buf: &mut String) -> Result { // Note that we are not calling the `.read_until` method here, but // rather our hardcoded implementation. For more details as to why, see @@ -2061,7 +2050,6 @@ pub trait BufRead: Read { /// assert_eq!(split_iter.next(), Some(b"dolor".to_vec())); /// assert_eq!(split_iter.next(), None); /// ``` - #[stable(feature = "rust1", since = "1.0.0")] fn split(self, byte: u8) -> Split where Self: Sized, @@ -2098,7 +2086,6 @@ pub trait BufRead: Read { /// # Errors /// /// Each line of the iterator has the same error semantics as [`BufRead::read_line`]. - #[stable(feature = "rust1", since = "1.0.0")] fn lines(self) -> Lines where Self: Sized, @@ -2113,7 +2100,6 @@ pub trait BufRead: Read { /// Please see the documentation of [`chain`] for more details. /// /// [`chain`]: Read::chain -#[stable(feature = "rust1", since = "1.0.0")] #[derive(Debug)] pub struct Chain { first: T, @@ -2140,7 +2126,6 @@ impl Chain { /// Ok(()) /// } /// ``` - #[stable(feature = "more_io_inner_methods", since = "1.20.0")] pub fn into_inner(self) -> (T, U) { (self.first, self.second) } @@ -2163,7 +2148,6 @@ impl Chain { /// Ok(()) /// } /// ``` - #[stable(feature = "more_io_inner_methods", since = "1.20.0")] pub fn get_ref(&self) -> (&T, &U) { (&self.first, &self.second) } @@ -2190,13 +2174,11 @@ impl Chain { /// Ok(()) /// } /// ``` - #[stable(feature = "more_io_inner_methods", since = "1.20.0")] pub fn get_mut(&mut self) -> (&mut T, &mut U) { (&mut self.first, &mut self.second) } } -#[stable(feature = "rust1", since = "1.0.0")] impl Read for Chain { fn read(&mut self, buf: &mut [u8]) -> Result { if !self.done_first { @@ -2224,7 +2206,7 @@ impl Read for Chain { } } -#[stable(feature = "chain_bufread", since = "1.9.0")] +#[cfg(feature="collections")] impl BufRead for Chain { fn fill_buf(&mut self) -> Result<&[u8]> { if !self.done_first { @@ -2262,7 +2244,6 @@ impl SizeHint for Chain { /// Please see the documentation of [`take`] for more details. /// /// [`take`]: Read::take -#[stable(feature = "rust1", since = "1.0.0")] #[derive(Debug)] pub struct Take { inner: T, @@ -2295,7 +2276,6 @@ impl Take { /// Ok(()) /// } /// ``` - #[stable(feature = "rust1", since = "1.0.0")] pub fn limit(&self) -> u64 { self.limit } @@ -2323,7 +2303,6 @@ impl Take { /// Ok(()) /// } /// ``` - #[stable(feature = "take_set_limit", since = "1.27.0")] pub fn set_limit(&mut self, limit: u64) { self.limit = limit; } @@ -2348,7 +2327,6 @@ impl Take { /// Ok(()) /// } /// ``` - #[stable(feature = "io_take_into_inner", since = "1.15.0")] pub fn into_inner(self) -> T { self.inner } @@ -2373,7 +2351,6 @@ impl Take { /// Ok(()) /// } /// ``` - #[stable(feature = "more_io_inner_methods", since = "1.20.0")] pub fn get_ref(&self) -> &T { &self.inner } @@ -2402,13 +2379,11 @@ impl Take { /// Ok(()) /// } /// ``` - #[stable(feature = "more_io_inner_methods", since = "1.20.0")] pub fn get_mut(&mut self) -> &mut T { &mut self.inner } } -#[stable(feature = "rust1", since = "1.0.0")] impl Read for Take { fn read(&mut self, buf: &mut [u8]) -> Result { // Don't call into inner reader at all at EOF because it may still block @@ -2426,6 +2401,7 @@ impl Read for Take { self.inner.initializer() } + #[cfg(feature="collections")] fn read_to_end(&mut self, buf: &mut Vec) -> Result { // Pass in a reservation_size closure that respects the current value // of limit for each read. If we hit the read limit, this prevents the @@ -2434,7 +2410,7 @@ impl Read for Take { } } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] impl BufRead for Take { fn fill_buf(&mut self) -> Result<&[u8]> { // Don't call into inner reader at all at EOF because it may still block @@ -2461,13 +2437,11 @@ impl BufRead for Take { /// Please see the documentation of [`bytes`] for more details. /// /// [`bytes`]: Read::bytes -#[stable(feature = "rust1", since = "1.0.0")] #[derive(Debug)] pub struct Bytes { inner: R, } -#[stable(feature = "rust1", since = "1.0.0")] impl Iterator for Bytes { type Item = Result; @@ -2515,14 +2489,14 @@ impl SizeHint for T { /// Please see the documentation of [`split`] for more details. /// /// [`split`]: BufRead::split -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] #[derive(Debug)] pub struct Split { buf: B, delim: u8, } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] impl Iterator for Split { type Item = Result>; @@ -2547,13 +2521,13 @@ impl Iterator for Split { /// Please see the documentation of [`lines`] for more details. /// /// [`lines`]: BufRead::lines -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] #[derive(Debug)] pub struct Lines { buf: B, } -#[stable(feature = "rust1", since = "1.0.0")] +#[cfg(feature="collections")] impl Iterator for Lines { type Item = Result; diff --git a/prelude.rs b/prelude.rs index d806431..6b9791a 100644 --- a/prelude.rs +++ b/prelude.rs @@ -8,7 +8,8 @@ //! use std::io::prelude::*; //! ``` -#![stable(feature = "rust1", since = "1.0.0")] +pub use super::{Read, Seek, Write}; +#[cfg(feature="collections")] pub use super::BufRead; -#[stable(feature = "rust1", since = "1.0.0")] -pub use super::{BufRead, Read, Seek, Write}; +#[cfg(feature="collections")] pub use alloc::boxed::Box; +#[cfg(feature="collections")] pub use collections::vec::Vec; diff --git a/util.rs b/util.rs index f472361..0a1899d 100644 --- a/util.rs +++ b/util.rs @@ -3,16 +3,16 @@ #[cfg(test)] mod tests; -use crate::fmt; +use core::fmt; use crate::io::{ - self, BufRead, Initializer, IoSlice, IoSliceMut, Read, Seek, SeekFrom, SizeHint, Write, + self, Initializer, IoSlice, IoSliceMut, Read, Seek, SeekFrom, SizeHint, Write, }; +#[cfg(feature="collections")] use crate::io::BufRead; /// A reader which is always at EOF. /// /// This struct is generally created by calling [`empty()`]. Please see /// the documentation of [`empty()`] for more details. -#[stable(feature = "rust1", since = "1.0.0")] pub struct Empty { _priv: (), } @@ -32,13 +32,10 @@ pub struct Empty { /// io::empty().read_to_string(&mut buffer).unwrap(); /// assert!(buffer.is_empty()); /// ``` -#[stable(feature = "rust1", since = "1.0.0")] -#[rustc_const_unstable(feature = "const_io_structs", issue = "78812")] pub const fn empty() -> Empty { Empty { _priv: () } } -#[stable(feature = "rust1", since = "1.0.0")] impl Read for Empty { #[inline] fn read(&mut self, _buf: &mut [u8]) -> io::Result { @@ -50,7 +47,8 @@ impl Read for Empty { Initializer::nop() } } -#[stable(feature = "rust1", since = "1.0.0")] + +#[cfg(feature="collections")] impl BufRead for Empty { #[inline] fn fill_buf(&mut self) -> io::Result<&[u8]> { @@ -60,7 +58,6 @@ impl BufRead for Empty { fn consume(&mut self, _n: usize) {} } -#[stable(feature = "empty_seek", since = "1.51.0")] impl Seek for Empty { fn seek(&mut self, _pos: SeekFrom) -> io::Result { Ok(0) @@ -75,7 +72,6 @@ impl Seek for Empty { } } -#[stable(feature = "std_debug", since = "1.16.0")] impl fmt::Debug for Empty { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.pad("Empty { .. }") @@ -92,7 +88,6 @@ impl SizeHint for Empty { /// /// This struct is generally created by calling [`repeat()`]. Please /// see the documentation of [`repeat()`] for more details. -#[stable(feature = "rust1", since = "1.0.0")] pub struct Repeat { byte: u8, } @@ -111,13 +106,10 @@ pub struct Repeat { /// io::repeat(0b101).read_exact(&mut buffer).unwrap(); /// assert_eq!(buffer, [0b101, 0b101, 0b101]); /// ``` -#[stable(feature = "rust1", since = "1.0.0")] -#[rustc_const_unstable(feature = "const_io_structs", issue = "78812")] pub const fn repeat(byte: u8) -> Repeat { Repeat { byte } } -#[stable(feature = "rust1", since = "1.0.0")] impl Read for Repeat { #[inline] fn read(&mut self, buf: &mut [u8]) -> io::Result { @@ -147,7 +139,6 @@ impl Read for Repeat { } } -#[stable(feature = "std_debug", since = "1.16.0")] impl fmt::Debug for Repeat { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.pad("Repeat { .. }") @@ -158,7 +149,6 @@ impl fmt::Debug for Repeat { /// /// This struct is generally created by calling [`sink`]. Please /// see the documentation of [`sink()`] for more details. -#[stable(feature = "rust1", since = "1.0.0")] pub struct Sink { _priv: (), } @@ -179,13 +169,10 @@ pub struct Sink { /// let num_bytes = io::sink().write(&buffer).unwrap(); /// assert_eq!(num_bytes, 5); /// ``` -#[stable(feature = "rust1", since = "1.0.0")] -#[rustc_const_unstable(feature = "const_io_structs", issue = "78812")] pub const fn sink() -> Sink { Sink { _priv: () } } -#[stable(feature = "rust1", since = "1.0.0")] impl Write for Sink { #[inline] fn write(&mut self, buf: &[u8]) -> io::Result { @@ -209,7 +196,6 @@ impl Write for Sink { } } -#[stable(feature = "write_mt", since = "1.48.0")] impl Write for &Sink { #[inline] fn write(&mut self, buf: &[u8]) -> io::Result { @@ -233,7 +219,6 @@ impl Write for &Sink { } } -#[stable(feature = "std_debug", since = "1.16.0")] impl fmt::Debug for Sink { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { f.pad("Sink { .. }")