Struct HdrWrite 

pub struct HdrWrite<'a>(pub &'a mut [u8; 42], pub usize);

A helper struct that implements std::io::Write for a fixed-size byte array.

This is used to capture the output of etherparse::PacketBuilder without requiring heap allocations.

Tuple Fields

0: &'a mut [u8; 42]

The buffer to write into.

1: usize

The current write position within the buffer.

Trait Implementations

impl Write for HdrWrite<'_>

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

Writes a buffer into the inner array, respecting the fixed size.

It copies bytes from buf into the internal array. If buf is larger than the remaining space, the data is truncated.

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

A no-op flush implementation, as the write is immediate.

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

Attempts to write an entire buffer into this writer.

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.