Struct bzip2::write::BzEncoder

[+] Show declaration

pub struct BzEncoder<W: Write> { /* fields omitted */ }

[−] Expand description

A compression stream which will have uncompressed data written to it and will write compressed data to an output stream.

Implementations

impl<W: Write> BzEncoder<W>[−]

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

Create a new compression stream which will compress at the given level to write compress output to the give output stream.

pub fn get_ref(&self) -> &W[−]

Acquires a reference to the underlying writer.

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

Acquires a mutable reference to the underlying writer.

Note that mutating the output/input state of the stream may corrupt this object, so care must be taken when using this method.

pub fn try_finish(&mut self) -> Result<()>[−]

Attempt to finish this output stream, writing out final chunks of data.

Note that this function can only be used once data has finished being written to the output stream. After this function is called then further calls to write may result in a panic.

Panics

Attempts to write data to this stream may result in a panic after this function is called.

pub fn finish(self) -> Result<W>[−]

Consumes this encoder, flushing the output stream.

This will flush the underlying data stream and then return the contained writer if the flush succeeded.

Note that this function may not be suitable to call in a situation where the underlying stream is an asynchronous I/O stream. To finish a stream the try_finish (or shutdown) method should be used instead. To re-acquire ownership of a stream it is safe to call this method after try_finish or shutdown has returned Ok.

pub fn total_out(&self) -> u64[−]

Returns the number of bytes produced by the compressor

Note that, due to buffering, this only bears any relation to total_in() after a call to flush(). At that point, total_out() / total_in() is the compression ratio.

pub fn total_in(&self) -> u64[−]

Returns the number of bytes consumed by the compressor (e.g. the number of bytes written to this stream.)

Trait Implementations

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

[+] Show hidden undocumented items

fn drop(&mut self)[−]

Executes the destructor for this type.

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

[+] 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, data: &[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.