Struct Crc16 

pub struct Crc16 { /* private fields */ }

An incremental CRC-16/CCITT-FALSE accumulator.

CCITT-FALSE is the long-standing checksum of short radio frames: polynomial 0x1021, initial value 0xFFFF, no reflection, and no final inversion. The accumulator lets a checksum span more than one slice, which the mesh frame needs because it sums its header and its payload while skipping the mutable hop-limit byte between them. For a single contiguous slice, crc16 is the one-shot form.

Examples

use pamoja_mesh::Crc16;

// Summing in two parts matches summing the whole in one go.
let mut crc = Crc16::new();
crc.update(b"1234");
crc.update(b"56789");
assert_eq!(crc.finish(), 0x29B1);

Implementations

impl Crc16

pub const fn new() -> Self

Creates an accumulator primed with the CCITT-FALSE initial value.

Returns

A fresh accumulator, ready for update.

pub fn update(&mut self, data: &[u8])

Folds a slice of bytes into the running checksum.

Arguments

• data - the bytes to add to the checksum.

pub fn finish(&self) -> u16

Returns the checksum of everything folded in so far.

Returns

The 16-bit CRC.

Trait Implementations

impl Clone for Crc16

fn clone(&self) -> Crc16

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Crc16

impl Debug for Crc16

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

Formats the value using the given formatter.

impl Default for Crc16

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Crc16

impl PartialEq for Crc16

fn eq(&self, other: &Crc16) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Crc16