Struct bytes::buf::Reader

pub struct Reader<B> { /* fields omitted */ }

A Buf adapter which implements io::Read for the inner value.

This struct is generally created by calling reader() on Buf. See documentation of reader() for more details.

Methods

impl<B: Buf> Reader<B>

pub fn get_ref(&self) -> &B

Gets a reference to the underlying Buf.

It is inadvisable to directly read from the underlying Buf.

Examples

use bytes::Buf;
use std::io::{self, Cursor};

let mut buf = Cursor::new(b"hello world").reader();

assert_eq!(0, buf.get_ref().position());

pub fn get_mut(&mut self) -> &mut B

Gets a mutable reference to the underlying Buf.

It is inadvisable to directly read from the underlying Buf.

Examples

use bytes::Buf;
use std::io::{self, Cursor};

let mut buf = Cursor::new(b"hello world").reader();
let mut dst = vec![];

buf.get_mut().set_position(2);
io::copy(&mut buf, &mut dst).unwrap();

assert_eq!(*dst, b"llo world"[..]);

pub fn into_inner(self) -> B

Consumes this Reader, returning the underlying value.

Examples

use bytes::Buf;
use std::io::{self, Cursor};

let mut buf = Cursor::new(b"hello world").reader();
let mut dst = vec![];

io::copy(&mut buf, &mut dst).unwrap();

let buf = buf.into_inner();
assert_eq!(0, buf.remaining());

Trait Implementations

impl<B: Debug> Debug for Reader<B>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<B: Buf + Sized> Read for Reader<B>

fn read(&mut self, dst: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

unsafe fn initializer(&self) -> Initializer

🔬 This is a nightly-only experimental API. (read_initializer)

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.

impl<B: Buf + Sized> BufRead for Reader<B>

fn fill_buf(&mut self) -> Result<&[u8]>

Returns the contents of the internal buffer, filling it with more data from the inner reader if it is empty.

fn consume(&mut self, amt: usize)

Tells this buffer that amt bytes have been consumed from the buffer, so they should no longer be returned in calls to read.

fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes into buf until the delimiter byte or EOF is reached.

fn read_line(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until a newline (the 0xA byte) is reached, and append them to the provided buffer.

fn split(self, byte: u8) -> Split<Self>

Returns an iterator over the contents of this reader split on the byte byte.

fn lines(self) -> Lines<Self>

Returns an iterator over the lines of this reader.