Struct ChecksumBuilder 

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

A builder to update the digest of the checksum incrementally.

Sometimes we don’t have a continuous buffer for creating a checksum, so calling Checksum::generate_byte would require us to allocate a completely new buffer. Since we’re not actually storing much data for calculating the checksum, it might be better to instead build up the checksum in individual steps.

let checksum = Checksum::new(0);
let mut builder = checksum.builder();
let crc = builder.update(&[0x01, 0x01]).update_byte(1).update(&[0x05]).digest();

Implementations

impl<'a> ChecksumBuilder<'a>

pub fn update_byte(&mut self, value: u8) -> &mut Self

Updates the internal state by adding a single byte.

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

Updates the internal state by adding each byte of the buffer.

pub fn digest(&self) -> u8

Creates the CRC byte for the currently ingested bytes.