Struct mesh::payload::buffer::Buf

pub struct Buf<'a> { /* private fields */ }

An accessor for writing to a partially-initialized byte buffer.

Implementations

impl<'a> Buf<'a>

pub fn remaining(&self) -> usize

Returns the remaining bytes that fit.

pub fn len(&self) -> usize

Returns the number of bytes that have been written.

pub fn push(&mut self, b: u8)

Extends the initialized portion of the buffer with b. Panics if it doesn’t fit.

pub fn append(&mut self, buf: &[u8])

Extends the initialized portion of the buffer with buf. Panics if the data does not fit.

pub fn fill(&mut self, val: u8, len: usize)

Extends the initialized portion of the buffer with len bytes equal to val. Panics if the data does not fit.

pub fn write_split<R>( &mut self, split_at: usize, f: impl FnOnce(Buf<'_>, Buf<'_>) -> R, ) -> R

Splits this buffer into two at split_at and calls f to fill out each part.

If the left buffer is not filled in full but the right buffer is partially initialized, then the remainder of the left buffer will be zero-initialized.

Trait Implementations

impl Buffer for Buf<'_>

unsafe fn unwritten(&mut self) -> &mut [MaybeUninit<u8>]

Returns the unwritten portion of the buffer. The returned data may or may not be initialized.

unsafe fn extend_written(&mut self, len: usize)

Extends the initialized region of the buffer.