Struct MemTrackingInput

pub struct MemTrackingInput<'a, I> { /* private fields */ }

Input implementation that can be used for limiting the heap memory usage while decoding.

Implementations

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

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

Create a new instance of MemTrackingInput.

pub fn used_mem(&self) -> usize

Get the used_mem field.

Trait Implementations

impl<'a, I: Input> Input for MemTrackingInput<'a, 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 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 ascend_ref(&mut self)

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

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

Hook that is called before allocating memory on the heap.