Struct SourceReader 

pub struct SourceReader<R> { /* private fields */ }

A wrapper around a reader that tracks read count and CRC32.

Used during compression to track how much data has been read and compute the CRC32 checksum of the data.

Implementations

impl<R> SourceReader<R>

pub fn new(reader: R) -> Self

Available on crate feature compress only.

Creates a new source reader wrapper.

Arguments

• reader - The underlying reader to wrap

pub fn read_count(&self) -> usize

Available on crate feature compress only.

Returns the total number of bytes read so far.

pub fn crc_value(&self) -> u32

Available on crate feature compress only.

Returns the CRC32 value of all data read.

The CRC is only computed once all data has been read (when read returns 0).

Trait Implementations

impl<R> From<R> for SourceReader<R>

Available on crate feature compress only.

fn from(value: R) -> Self

Converts to this type from the input type.

impl<R: Read> Read for SourceReader<R>

Available on crate feature compress only.

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.

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

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

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.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

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

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

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

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

Reads the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

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

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

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

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

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

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

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