fn decode(bytes: &'a [u8]) -> Result<Status<(usize, Self)>, DecodeError> {
        let (fixed_header_offset, fixed_header) = read!(FixedHeader::decode, bytes, 0);

        let (variable_header_consumed, variable_header) = if let Some(result) =
            VariableHeader::decode(
                fixed_header.r#type(),
                fixed_header.flags(),
                &bytes[fixed_header_offset..],
            ) {
            let (variable_header_offset, variable_header) = complete!(result);
            (variable_header_offset, Some(variable_header))
        } else {
            (0, None)
        };

        let payload_len = fixed_header.len() as usize - variable_header_consumed;

        let available = bytes.len() - (fixed_header_offset + variable_header_consumed);
        let needed = payload_len - min(available, payload_len);
        if needed > 0 {
            return Ok(Status::Partial(needed));
        }

        let payload_bytes = &bytes[fixed_header_offset + variable_header_consumed
            ..fixed_header_offset + variable_header_consumed + payload_len];

        let payload = if let Some(result) = Payload::decode(fixed_header.r#type(), payload_bytes) {
            match result {
                Err(e) => return Err(e),
                Ok(Status::Partial(n)) => return Ok(Status::Partial(n)),
                Ok(Status::Complete((_, payload))) => payload,
            }
        } else {
            payload::Payload::Bytes(payload_bytes)
        };

        Ok(Status::Complete((
            fixed_header_offset + fixed_header.len() as usize,
            Self {
                fixed_header,
                variable_header,
                payload,
            },
        )))
    }
/// Decode any MQTT packet from a pre-allocated buffer.
///
/// If an unrecoverable error occurs an `Err(x)` is returned, the caller should
/// disconnect and network connection and discard the contents of the connection
/// receive buffer.
///
/// Decoding may return an `Ok(Status::Partial(x))` in which case the caller
/// should buffer at most `x` more bytes and then attempt decoding again.
///
/// If decoding succeeds an `Ok(Status::Complete(x))` will be returned
/// containing the number of bytes read from the buffer and the decoded packet.
/// The lifetime of the decoded packet is tied to the input buffer.
Decode any MQTT packet from a pre-allocated buffer.
If an unrecoverable error occurs an `Err(x)` is returned, the caller should
disconnect and network connection and discard the contents of the connection
receive buffer.

Decoding may return an `Ok(Status::Partial(x))` in which case the caller
should buffer at most `x` more bytes and then attempt decoding again.

If decoding succeeds an `Ok(Status::Complete(x))` will be returned
containing the number of bytes read from the buffer and the decoded packet.
The lifetime of the decoded packet is tied to the input buffer.
Decode any MQTT packet from a pre - allocated buffer . If an unrecoverable error occurs an ` Err ( x ) ` is returned the caller should disconnect and network connection and discard the contents of the connection receive buffer . Decoding may return an ` Ok ( Status :: Partial ( x )) ` in which case the caller should buffer at most ` x ` more bytes and then attempt decoding again . If decoding succeeds an ` Ok ( Status :: Complete ( x )) ` will be returned containing the number of bytes read from the buffer and the decoded packet . The lifetime of the decoded packet is tied to the input buffer .
fn decode(bytes: &'a [u8]) -> Result<Status<(usize, Self)>, DecodeError> {
        let (fixed_header_offset, fixed_header) = read!(FixedHeader::decode, bytes, 0);
        let (variable_header_consumed, variable_header) = if let Some(result) =
            VariableHeader::decode(
                fixed_header.r#type(),
                fixed_header.flags(),
                &bytes[fixed_header_offset..],
            ) {
            let (variable_header_offset, variable_header) = complete!(result);
            (variable_header_offset, Some(variable_header))
        } else {
            (0, None)
        };
        let payload_len = fixed_header.len() as usize - variable_header_consumed;
        let available = bytes.len() - (fixed_header_offset + variable_header_consumed);
        let needed = payload_len - min(available, payload_len);
        if needed > 0 {
            return Ok(Status::Partial(needed));
        }
        let payload_bytes = &bytes[fixed_header_offset + variable_header_consumed
            ..fixed_header_offset + variable_header_consumed + payload_len];
        let payload = if let Some(result) = Payload::decode(fixed_header.r#type(), payload_bytes) {
            match result {
                Err(e) => return Err(e),
                Ok(Status::Partial(n)) => return Ok(Status::Partial(n)),
                Ok(Status::Complete((_, payload))) => payload,
            }
        } else {
            payload::Payload::Bytes(payload_bytes)
        };
        Ok(Status::Complete((
            fixed_header_offset + fixed_header.len() as usize,
            Self {
                fixed_header,
                variable_header,
                payload,
            },
        )))
    }
fn decode ( bytes : & ' a [ u8 ] ) -> Result < Status < ( usize , Self ) > , DecodeError > { let ( fixed_header_offset , fixed_header ) = read ! ( FixedHeader decode bytes 0 ) ; let ( variable_header_consumed , variable_header ) = if let Some ( result ) = VariableHeader :: decode ( fixed_header . r#type ( ) , fixed_header . flags ( ) , & bytes [ fixed_header_offset .. ] , ) { let ( variable_header_offset , variable_header ) = complete ! ( result ) ; ( variable_header_offset , Some ( variable_header ) ) } else { ( 0 , None ) } ; let payload_len = fixed_header . len ( ) as usize - variable_header_consumed ; let available = bytes . len ( ) - ( fixed_header_offset + variable_header_consumed ) ; let needed = payload_len - min ( available , payload_len ) ; if needed > 0 { return Ok ( Status :: Partial ( needed ) ) ; } let payload_bytes = & bytes [ fixed_header_offset + variable_header_consumed .. fixed_header_offset + variable_header_consumed + payload_len ] ; let payload = if let Some ( result ) = Payload :: decode ( fixed_header . r#type ( ) , payload_bytes ) { match result { Err ( e ) => return Err ( e ) , Ok ( Status :: Partial ( n ) ) => return Ok ( Status :: Partial ( n ) ) , Ok ( Status :: Complete ( ( _ , payload ) ) ) => payload , } } else { payload :: Payload :: Bytes ( payload_bytes ) } ; Ok ( Status :: Complete ( ( fixed_header_offset + fixed_header . len ( ) as usize , Self { fixed_header , variable_header , payload , } , ) ) ) }
Decode any MQTT packet from a pre-allocated buffer.
Decode any MQTT packet from a pre - allocated buffer .
bytes
&'a [u8]