Struct iowrap::Pos

pub struct Pos<R: Read> { /* fields omitted */ }

Track how many bytes have been read from a stream.

This may not line up with the position in the file in case of IO errors, this can't be done through the Read interface. The position() returned will be just before the error, if inspected immediately after the first error.

Methods

impl<R: Read> Pos<R>

pub fn new(inner: R) -> Self

pub fn position(&self) -> u64

The number of bytes successfully read from the stream.

pub fn into_inner(self) -> R

Trait Implementations

impl<R: Read> Read for Pos<R>

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.

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.

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.

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

Creates an adaptor which will chain this stream with another.

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

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