Struct CountingWriter 

pub struct CountingWriter<W> { /* private fields */ }

A write wrapper that counts bytes written.

Wraps any Write implementation and tracks the total number of bytes written through it. The counter can be reset between operations.

Implementations

impl<W> CountingWriter<W>

pub fn new(inner: W) -> Self

Create a new counting writer wrapping the given writer.

pub fn bytes_written(&self) -> u64

Get the number of bytes written since the last reset.

pub fn reset_counter(&mut self)

Reset the byte counter to zero.

pub fn inner(&self) -> &W

Get a reference to the underlying writer.

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

Get a mutable reference to the underlying writer.

pub fn into_inner(self) -> W

Consume the counting writer and return the inner writer.

Trait Implementations

impl<W: Debug> Debug for CountingWriter<W>

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

Formats the value using the given formatter.

impl<W: Write> Write for CountingWriter<W>

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

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

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

Attempts to write an entire buffer into this writer.

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

Like write, except that it writes from a slice of buffers.

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.

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.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

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

where Self: Sized,

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