Struct packable::unpacker::CounterUnpacker

pub struct CounterUnpacker<U: Unpacker> { /* private fields */ }

An Unpacker able to keep count of the number of read bytes.

Implementations

impl<U: Unpacker> CounterUnpacker<U>

pub fn new(unpacker: U) -> Self

Creates a new CounterUnpacker.

pub fn counter(&self) -> usize

Returns the number of read bytes.

pub fn into_inner(self) -> U

Consumes the value to return the inner Unpacker.

Trait Implementations

impl<U: Unpacker> Unpacker for CounterUnpacker<U>

type Error = <U as Unpacker>::Error

An error type representing any error related to reading bytes.

fn unpack_bytes<B: AsMut<[u8]>>(&mut self, bytes: B) -> Result<(), Self::Error>

Reads a sequence of bytes from the Unpacker. This sequence must be long enough to fill bytes completely. This method must fail if the unpacker does not have enough bytes to fulfill the request.

fn ensure_bytes(&self, len: usize) -> Result<(), Self::Error>

Tries to guarantee that the Unpacker has at least len bytes.

fn read_bytes(&self) -> Option<usize>

Returns the exact number of read bytes if possible.