Struct bufstream::BufStream

pub struct BufStream<S: Write> { /* fields omitted */ }

[−] Expand description

Wraps a Stream and buffers input and output to and from it.

It can be excessively inefficient to work directly with a Read+Write. For example, every call to read or write on TcpStream results in a system call. A BufStream keeps in memory buffers of data, making large, infrequent calls to read and write on the underlying Read+Write.

The output buffer will be written out when this stream is dropped.

Methods

impl<S: Read + Write> BufStream<S>

fn with_capacities(reader_cap: usize,
                   writer_cap: usize,
                   inner: S)
                   -> BufStream<S>[−]

Creates a new buffered stream with explicitly listed capacities for the reader/writer buffer.

fn new(inner: S) -> BufStream<S>[−]

Creates a new buffered stream with the default reader/writer buffer capacities.

fn get_ref(&self) -> &S[−]

Gets a reference to the underlying stream.

fn get_mut(&mut self) -> &mut S[−]

Gets a mutable reference to the underlying stream.

Warning

It is inadvisable to read directly from or write directly to the underlying stream.

fn into_inner(self) -> Result<S, IntoInnerError<BufStream<S>>>[−]

Unwraps this BufStream, returning the underlying stream.

The internal write buffer is written out before returning the stream. Any leftover data in the read buffer is lost.

Trait Implementations

impl<S: Debug + Write> Debug for BufStream<S>

fn fmt(&self, __arg_0: &mut Formatter) -> Result[−]

Formats the value using the given formatter.

impl<S: Read + Write> BufRead for BufStream<S>

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

Fills the internal buffer of this object, returning the buffer contents.

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.

impl<S: Read + Write> Read for BufStream<S>

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

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

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, placing them into 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 chars(self) -> Chars<Self>[−]

Unstable (io)

: the semantics of a partial read/write of where errors happen is currently unclear and may change

Transforms this Read instance to an Iterator over chars.

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<S: Read + Write> Write for BufStream<S>

fn write(&mut self, buf: &[u8]) -> Result<usize>[−]

Write a buffer into this object, returning how many bytes were written.

fn flush(&mut self) -> Result<()>[−]

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

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

Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>[−]

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self[−]

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