Struct flate2::write::DeflateDecoder [−][src]
A DEFLATE decoder, or decompressor.
This structure implements a Write
and will emit a stream of decompressed
data when fed a stream of compressed data.
Examples
use std::io::prelude::*; use std::io; use flate2::write::DeflateDecoder; // Uncompresses a Deflate Encoded vector of bytes and returns a string or error // Here Vec<u8> implements Write fn decode_writer(bytes: Vec<u8>) -> io::Result<String> { let mut writer = Vec::new(); let mut deflater = DeflateDecoder::new(writer); deflater.write_all(&bytes[..])?; writer = deflater.finish()?; let return_string = String::from_utf8(writer).expect("String parsing error"); Ok(return_string) }
Implementations
impl<W: Write> DeflateDecoder<W>
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pub fn new(w: W) -> DeflateDecoder<W>ⓘNotable traits for DeflateDecoder<W>
impl<W: Read + Write> Read for DeflateDecoder<W>impl<W: Write> Write for DeflateDecoder<W>
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Notable traits for DeflateDecoder<W>
impl<W: Read + Write> Read for DeflateDecoder<W>impl<W: Write> Write for DeflateDecoder<W>
Creates a new decoder which will write uncompressed data to the stream.
When this encoder is dropped or unwrapped the final pieces of data will be flushed.
pub fn get_ref(&self) -> &W
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Acquires a reference to the underlying writer.
pub fn get_mut(&mut self) -> &mut W
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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 reset(&mut self, w: W) -> Result<W>
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Resets the state of this decoder entirely, swapping out the output stream for another.
This function will finish encoding the current stream into the current output stream before swapping out the two output streams.
This will then reset the internal state of this decoder and replace the
output stream with the one provided, returning the previous output
stream. Future data written to this decoder will be decompressed into
the output stream w
.
Errors
This function will perform I/O to finish the stream, and if that I/O returns an error then that will be returned from this function.
pub fn try_finish(&mut self) -> Result<()>
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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 finish the stream, returning any errors which happen.
pub fn finish(self) -> Result<W>
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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
.
Errors
This function will perform I/O to complete this stream, and any I/O errors which occur will be returned from this function.
pub fn total_in(&self) -> u64
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Returns the number of bytes that the decompressor has consumed for decompression.
Note that this will likely be smaller than the number of bytes successfully written to this stream due to internal buffering.
pub fn total_out(&self) -> u64
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Returns the number of bytes that the decompressor has written to its output stream.
Trait Implementations
impl<W: Debug + Write> Debug for DeflateDecoder<W>
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impl<W: Read + Write> Read for DeflateDecoder<W>
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fn read(&mut self, buf: &mut [u8]) -> Result<usize>
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pub fn read_vectored(
&mut self,
bufs: &mut [IoSliceMut<'_>]
) -> Result<usize, Error>
1.36.0[src]
&mut self,
bufs: &mut [IoSliceMut<'_>]
) -> Result<usize, Error>
pub fn is_read_vectored(&self) -> bool
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pub unsafe fn initializer(&self) -> Initializer
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pub fn read_to_end(&mut self, buf: &mut Vec<u8, Global>) -> Result<usize, Error>
1.0.0[src]
pub fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>
1.0.0[src]
pub fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>
1.6.0[src]
pub fn by_ref(&mut self) -> &mut Self
1.0.0[src]
pub fn bytes(self) -> Bytes<Self>
1.0.0[src]
pub fn chain<R>(self, next: R) -> Chain<Self, R> where
R: Read,
1.0.0[src]
R: Read,
pub fn take(self, limit: u64) -> Take<Self>
1.0.0[src]
impl<W: Write> Write for DeflateDecoder<W>
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fn write(&mut self, buf: &[u8]) -> Result<usize>
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fn flush(&mut self) -> Result<()>
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pub fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>
1.36.0[src]
pub fn is_write_vectored(&self) -> bool
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pub fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>
1.0.0[src]
pub fn write_all_vectored(
&mut self,
bufs: &mut [IoSlice<'_>]
) -> Result<(), Error>
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&mut self,
bufs: &mut [IoSlice<'_>]
) -> Result<(), Error>
pub fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>
1.0.0[src]
pub fn by_ref(&mut self) -> &mut Self
1.0.0[src]
Auto Trait Implementations
impl<W> RefUnwindSafe for DeflateDecoder<W> where
W: RefUnwindSafe,
W: RefUnwindSafe,
impl<W> Send for DeflateDecoder<W> where
W: Send,
W: Send,
impl<W> Sync for DeflateDecoder<W> where
W: Sync,
W: Sync,
impl<W> Unpin for DeflateDecoder<W> where
W: Unpin,
W: Unpin,
impl<W> UnwindSafe for DeflateDecoder<W> where
W: UnwindSafe,
W: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,