Struct postcard_cobs::CobsDecoder

pub struct CobsDecoder<'a> { /* fields omitted */ }

The CobsDecoder type is used to decode a stream of bytes to a given mutable output slice. This is often useful when heap data structures are not available, or when not all message bytes are received at a single point in time.

Implementations

impl<'a> CobsDecoder<'a>

pub fn new(dest: &'a mut [u8]) -> CobsDecoder<'a>

Create a new streaming Cobs Decoder. Provide the output buffer for the decoded message to be placed in

pub fn feed(&mut self, data: u8) -> Result<Option<usize>, usize>

Push a single byte into the streaming CobsDecoder. Return values mean:

• Ok(None) - State machine okay, more data needed
• Ok(Some(N)) - A message of N bytes was successfully decoded
• Err(M) - Message decoding failed, and M bytes were written to output

NOTE: Sentinel value must be included in the input to this function for the decoding to complete

pub fn push(&mut self, data: &[u8]) -> Result<Option<(usize, usize)>, usize>

Push a slice of bytes into the streaming CobsDecoder. Return values mean:

• Ok(None) - State machine okay, more data needed
• Ok(Some((N, M))) - A message of N bytes was successfully decoded, using M bytes from data (and earlier data)
• Err(J) - Message decoding failed, and J bytes were written to output

NOTE: Sentinel value must be included in the input to this function for the decoding to complete

Trait Implementations

impl<'a> Debug for CobsDecoder<'a>

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

Formats the value using the given formatter.