Struct CountedInput

pub struct CountedInput<'a, I: Input> { /* private fields */ }

A wrapper for Input which tracks the number fo bytes that are successfully read.

If inner Input fails to read, the counter is not incremented.

It can count until u64::MAX - 1 accurately then saturate.

Implementations

impl<'a, I: Input> CountedInput<'a, I>

pub fn new(input: &'a mut I) -> Self

Create a new CountedInput with the given input.

pub fn count(&self) -> u64

Get the number of bytes successfully read.

Trait Implementations

impl<I: Input> Input for CountedInput<'_, I>

fn remaining_len(&mut self) -> Result<Option<usize>, Error>

Should return the remaining length of the input data. If no information about the input length is available, None should be returned.

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

Read the exact number of bytes required to fill the given buffer.

fn read_byte(&mut self) -> Result<u8, Error>

Read a single byte from the input.

fn ascend_ref(&mut self)

Ascend to previous structure level when decoding. This is called when decoding reference-based type is finished.

fn descend_ref(&mut self) -> Result<(), Error>

Descend into nested reference when decoding. This is called when decoding a new refence-based instance, such as Vec or Box. Currently, all such types are allocated on the heap.

fn on_before_alloc_mem(&mut self, _size: usize) -> Result<(), Error>

Hook that is called before allocating memory on the heap.