Struct bzip2::bufread::BzEncoder

[+] Show declaration

pub struct BzEncoder<R> { /* fields omitted */ }

[−] Expand description

A bz2 encoder, or compressor.

This structure implements a BufRead interface and will read uncompressed data from an underlying stream and emit a stream of compressed data.

Implementations

impl<R: BufRead> BzEncoder<R>[−]

pub fn new(r: R, level: Compression) -> BzEncoder<R>[−]

Creates a new encoder which will read uncompressed data from the given stream and emit the compressed stream.

impl<R> BzEncoder<R>[−]

pub fn get_ref(&self) -> &R[−]

Acquires a reference to the underlying stream

pub fn get_mut(&mut self) -> &mut R[−]

Acquires a mutable reference to the underlying stream

Note that mutation of the stream may result in surprising results if this encoder is continued to be used.

pub fn into_inner(self) -> R[−]

Consumes this encoder, returning the underlying reader.

pub fn total_out(&self) -> u64[−]

Returns the number of bytes produced by the compressor (e.g. the number of bytes read from this stream)

Note that, due to buffering, this only bears any relation to total_in() when the compressor chooses to flush its data (unfortunately, this won’t happen in general at the end of the stream, because the compressor doesn’t know if there’s more data to come). At that point, total_out() / total_in() would be the compression ratio.

pub fn total_in(&self) -> u64[−]

Returns the number of bytes consumed by the compressor (e.g. the number of bytes read from the underlying stream)

Trait Implementations

impl<R: BufRead> Read for BzEncoder<R>[+]

[+] Show hidden undocumented items

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.

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

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

pub fn is_read_vectored(&self) -> bool[−]

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

Determines if this Reader has an efficient read_vectored implementation.

pub 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.

pub fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>[−]

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

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

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

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

Read the exact number of bytes required to fill buf.

pub fn by_ref(&mut self) -> &mut Self[−]

Creates a “by reference” adaptor for this instance of Read.

pub fn bytes(self) -> Bytes<Self>[−]

Transforms this Read instance to an Iterator over its bytes.

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

Creates an adaptor which will chain this stream with another.

pub fn take(self, limit: u64) -> Take<Self>[−]

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

impl<W: Write> Write for BzEncoder<W>[+]

[+] Show hidden undocumented items

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

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

fn flush(&mut self) -> Result<()>[−]

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

pub fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>[−]

Like write, except that it writes from a slice of buffers.

pub fn is_write_vectored(&self) -> bool[−]

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

Determines if this Writer has an efficient write_vectored implementation.

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

Attempts to write an entire buffer into this writer.

pub fn write_all_vectored(
    &mut self,
    bufs: &mut [IoSlice<'_>]
) -> Result<(), Error>[−]

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

Attempts to write multiple buffers into this writer.

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

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

pub fn by_ref(&mut self) -> &mut Self[−]

Creates a “by reference” adaptor for this instance of Write.