Trait Checksum 

pub trait Checksum {
    const LEN: usize;

    // Required method
    fn compute(&self, data: &[u8]) -> u64;
}

An integrity check over a byte slice that yields Checksum::LEN bytes.

Example

A one-byte XOR checksum (weak, but a short example):

use wire_codec::checksum::Checksum;

struct Xor8;

impl Checksum for Xor8 {
    const LEN: usize = 1;
    fn compute(&self, data: &[u8]) -> u64 {
        u64::from(data.iter().fold(0u8, |acc, b| acc ^ b))
    }
}

assert_eq!(Xor8.compute(&[0x0F, 0xF0]), 0xFF);

Required Associated Constants

const LEN: usize

Number of bytes the checksum occupies on the wire. Must be in 1..=8.

Required Methods

fn compute(&self, data: &[u8]) -> u64

Compute the checksum of data.

Only the low LEN * 8 bits of the result are transmitted.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Checksum for Crc32

const LEN: usize = 4

impl Checksum for Crc16CcittFalse

const LEN: usize = 2

impl Checksum for Crc32c

const LEN: usize = 4