Struct flate2::gz::write::GzEncoder[][src]

pub struct GzEncoder<W: Write> {
    inner: Writer<W, Compress>,
    crc: Crc,
    crc_bytes_written: usize,
    header: Vec<u8>,
}
Expand description

A gzip streaming encoder

This structure exposes a Write interface that will emit compressed data to the underlying writer W.

Examples

use std::io::prelude::*;
use flate2::Compression;
use flate2::write::GzEncoder;

// Vec<u8> implements Write to print the compressed bytes of sample string

let mut e = GzEncoder::new(Vec::new(), Compression::default());
e.write_all(b"Hello World").unwrap();
println!("{:?}", e.finish().unwrap());

Fields

inner: Writer<W, Compress>crc: Crccrc_bytes_written: usizeheader: Vec<u8>

Implementations

Creates a new encoder which will use the given compression level.

The encoder is not configured specially for the emitted header. For header configuration, see the GzBuilder type.

The data written to the returned encoder will be compressed and then written to the stream w.

Acquires a reference to the underlying writer.

Acquires a mutable reference to the underlying writer.

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

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.

Errors

This function will perform I/O to complete this stream, and any I/O errors which occur will be returned from this function.

Finish encoding this stream, returning the underlying writer once the encoding is done.

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.

Errors

This function will perform I/O to complete this stream, and any I/O errors which occur will be returned from this function.

Trait Implementations

Formats the value using the given formatter. Read more

Executes the destructor for this type. Read more

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

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

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

Determines if this Reader has an efficient read_vectored implementation. Read more

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

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

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

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

Read the exact number of bytes required to fill buf. Read more

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

Transforms this Read instance to an Iterator over its bytes. Read more

Creates an adapter which will chain this stream with another. Read more

Creates an adapter which will read at most limit bytes from it. Read more

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

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

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

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

Determines if this Writer has an efficient write_vectored implementation. Read more

Attempts to write an entire buffer into this writer. Read more

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

Attempts to write multiple buffers into this writer. Read more

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

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.