Struct exr::io::PeekRead

pub struct PeekRead<T> { /* fields omitted */ }

Peek a single byte without consuming it.

Methods

impl<T: Read> PeekRead<T>

pub fn new(inner: T) -> Self

Wrap a reader to make it peekable.

pub fn peek_u8(&mut self) -> &IoResult<u8>

Read a single byte and return that without consuming it. The next read call will include that byte.

pub fn skip_if_eq(&mut self, value: u8) -> IoResult<bool>

Skip a single byte if it equals the specified value. Returns whether the value was found. Consumes the peeked result if an error occurred.

impl<T: Read + Seek> PeekRead<Tracking<T>>

pub fn skip_to(&mut self, position: usize) -> Result<()>

Seek this read to the specified byte position. Discards any previously peeked value.

Trait Implementations

impl<T: Debug> Debug for PeekRead<T>

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

Formats the value using the given formatter.

impl<T: Read> Read for PeekRead<T>

fn read(&mut self, target_buffer: &mut [u8]) -> IoResult<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.

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.

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

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

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

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

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

Read the exact number of bytes required to fill buf.

Important traits for &'_ mut W

impl<'_, W> Write for &'_ mut W where
    W: Write + ?Sized, impl<'_, R> Read for &'_ mut R where
    R: Read + ?Sized, 

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

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

Important traits for Chain<T, U>

impl<T, U> Read for Chain<T, U> where
    T: Read,
    U: Read, 

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

Creates an adaptor which will chain this stream with another.

Important traits for Take<T>

impl<T> Read for Take<T> where
    T: Read, 

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

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