Struct Bit4Row 

pub struct Bit4Row<'a> { /* private fields */ }

One bounds-validated packed four-bit row borrowed from a mapped region.

from_mapped_region validates an in-bounds offset and length; the crate-only from_validated_bytes wraps a slice whose persisted range was already validated. Both retain a borrowed slice, so the stored address is readable for that slice’s complete length while this handle is alive.

Implementations

impl<'a> Bit4Row<'a>

pub fn from_mapped_region( region: &'a [u8], offset: usize, row_bytes: usize, ) -> Option<Self>

Borrows one row at offset when the complete row lies in region.

Returns None when offset + row_bytes overflows or exceeds the mapped region. No alignment is required by any installed kernel.

Trait Implementations

impl<'a> Clone for Bit4Row<'a>

fn clone(&self) -> Bit4Row<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Copy for Bit4Row<'a>

impl Debug for Bit4Row<'_>

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.