Struct snap::write::FrameEncoder

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pub struct FrameEncoder<W: Write> { /* private fields */ }
Expand description

A writer for compressing a Snappy stream.

This FrameEncoder wraps any other writer that implements io::Write. Bytes written to this writer are compressed using the Snappy frame format (file extension sz, MIME type application/x-snappy-framed).

Writes are buffered automatically, so there’s no need to wrap the given writer in a std::io::BufWriter.

The writer will be flushed automatically when it is dropped. If an error occurs, it is ignored.

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impl<W: Write> FrameEncoder<W>

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pub fn new(wtr: W) -> FrameEncoder<W>

Create a new writer for streaming Snappy compression.

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pub fn into_inner(self) -> Result<W, IntoInnerError<FrameEncoder<W>>>

Returns the underlying stream, consuming and flushing this writer.

If flushing the writer caused an error, then an IntoInnerError is returned, which contains both the writer and the original writer.

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pub fn get_ref(&self) -> &W

Gets a reference to the underlying writer in this encoder.

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pub fn get_mut(&mut self) -> &mut W

Gets a reference to the underlying writer in this encoder.

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

Trait Implementations§

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impl<W: Debug + Write> Debug for FrameEncoder<W>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<W: Write> Drop for FrameEncoder<W>

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<W: Write> Write for FrameEncoder<W>

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

Writes a buffer into this writer, returning how many bytes were written. Read more
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fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
1.36.0 · source§

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

Like write, except that it writes from a slice of buffers. Read more
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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. Read more
1.0.0 · source§

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

Attempts to write an entire buffer into this writer. Read more
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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. Read more
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fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where Self: Sized,

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

Auto Trait Implementations§

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impl<W> Freeze for FrameEncoder<W>
where W: Freeze,

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impl<W> RefUnwindSafe for FrameEncoder<W>
where W: RefUnwindSafe,

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impl<W> Send for FrameEncoder<W>
where W: Send,

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impl<W> Sync for FrameEncoder<W>
where W: Sync,

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impl<W> Unpin for FrameEncoder<W>
where W: Unpin,

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impl<W> UnwindSafe for FrameEncoder<W>
where W: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.