Struct appendbuf::AppendBuf

pub struct AppendBuf {
    // some fields omitted
}

An append-only, atomically reference counted buffer.

Methods

impl AppendBuf

fn new(len: usize) -> AppendBuf

Create a new, empty AppendBuf with the given capacity.

fn slice(&self) -> Slice

Create a new Slice of the entire AppendBuf so far.

fn remaining(&self) -> usize

Retrieve the amount of remaining space in the AppendBuf.

fn fill(&mut self, buf: &[u8]) -> usize

Write the data in the passed buffer onto the AppendBuf.

This is an alternative to using the implementation of std::io::Write which does not unnecessarily use Result.

fn get_write_buf(&mut self) -> &mut [u8]

Get the remaining space in the AppendBuf for writing.

If you wish the see the data written in subsequent Slices, you must also call advance with the amount written.

Reads from this buffer are reads into uninitalized memory, and so should be carefully avoided.

unsafe fn advance(&mut self, amount: usize)

Advance the position of the AppendBuf.

You should only advance the buffer if you have written to a buffer returned by get_write_buf.

Trait Implementations

impl Write for AppendBuf

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.

impl Drop for AppendBuf

fn drop(&mut self)

A method called when the value goes out of scope.