pub fn decode_slice_from_tree(
    t: &LabeledTree<Vec<u8>>,
) -> Result<(SubnetId, StreamSlice), DecodeStreamError> {
    let streams = EncodedStreams::deserialize(tree_deserializer::LabeledTreeDeserializer::new(t))
        .map_err(|err| {
        DecodeStreamError::SerializationError(format!(
            "failed to deserialize encoded streams: {}",
            err
        ))
    })?;

    if streams.streams.len() != 1 {
        return Err(DecodeStreamError::SerializationError(format!(
            "expected a stream with a single subnet, got {} subnets",
            streams.streams.len()
        )));
    }

    let (subnet, encoded_stream) = streams.streams.into_iter().next().unwrap();

    let header: StreamHeader =
        decode_stream_header(encoded_stream.header.as_ref()).map_err(|err| {
            DecodeStreamError::SerializationError(format!(
                "failed to deserialize stream header from CBOR: {}",
                err
            ))
        })?;

    let mut messages = encoded_stream
        .messages
        .keys()
        .next()
        .map(|idx| StreamIndexedQueue::with_begin(*idx));

    if let Some(ref mut queue) = messages {
        for (idx, bytes) in encoded_stream.messages.into_iter() {
            let msg = decode_message(bytes.as_ref()).map_err(|err| {
                DecodeStreamError::SerializationError(format!(
                    "failed to deserialize message {} from subnet {}: {}",
                    idx, subnet, err
                ))
            })?;

            if idx != queue.end() {
                return Err(DecodeStreamError::SerializationError(format!(
                    "non-consecutive message indices: {} follows {}",
                    idx,
                    queue.end()
                )));
            }

            queue.push(msg);
        }

        if queue.begin() < header.begin || header.end < queue.end() {
            return Err(DecodeStreamError::SerializationError(
                format!("the range of message indices [{}, {}) does not agree with the range in header [{}, {})",
                        queue.begin(), queue.end(), header.begin, header.end)
            ));
        }
    }

    Ok((subnet, StreamSlice::from_parts(header, messages)))
}
/// Recovers a stream slice from its canonical form.
Recovers a stream slice from its canonical form.
Recovers a stream slice from its canonical form .
pub fn decode_slice_from_tree(
    t: &LabeledTree<Vec<u8>>,
) -> Result<(SubnetId, StreamSlice), DecodeStreamError> {
    let streams = EncodedStreams::deserialize(tree_deserializer::LabeledTreeDeserializer::new(t))
        .map_err(|err| {
        DecodeStreamError::SerializationError(format!(
            "failed to deserialize encoded streams: {}",
            err
        ))
    })?;
    if streams.streams.len() != 1 {
        return Err(DecodeStreamError::SerializationError(format!(
            "expected a stream with a single subnet, got {} subnets",
            streams.streams.len()
        )));
    }
    let (subnet, encoded_stream) = streams.streams.into_iter().next().unwrap();
    let header: StreamHeader =
        decode_stream_header(encoded_stream.header.as_ref()).map_err(|err| {
            DecodeStreamError::SerializationError(format!(
                "failed to deserialize stream header from CBOR: {}",
                err
            ))
        })?;
    let mut messages = encoded_stream
        .messages
        .keys()
        .next()
        .map(|idx| StreamIndexedQueue::with_begin(*idx));
    if let Some(ref mut queue) = messages {
        for (idx, bytes) in encoded_stream.messages.into_iter() {
            let msg = decode_message(bytes.as_ref()).map_err(|err| {
                DecodeStreamError::SerializationError(format!(
                    "failed to deserialize message {} from subnet {}: {}",
                    idx, subnet, err
                ))
            })?;
            if idx != queue.end() {
                return Err(DecodeStreamError::SerializationError(format!(
                    "non-consecutive message indices: {} follows {}",
                    idx,
                    queue.end()
                )));
            }
            queue.push(msg);
        }
        if queue.begin() < header.begin || header.end < queue.end() {
            return Err(DecodeStreamError::SerializationError(
                format!("the range of message indices [{}, {}) does not agree with the range in header [{}, {})",
                        queue.begin(), queue.end(), header.begin, header.end)
            ));
        }
    }
    Ok((subnet, StreamSlice::from_parts(header, messages)))
}
pub fn decode_slice_from_tree ( t : & LabeledTree < Vec < u8 > > , ) -> Result < ( SubnetId , StreamSlice ) , DecodeStreamError > { let streams = EncodedStreams :: deserialize ( tree_deserializer :: LabeledTreeDeserializer :: new ( t ) ) . map_err ( | err | { DecodeStreamError :: SerializationError ( format ! ( " " err ) ) } ) ? ; if streams . streams . len ( ) != 1 { return Err ( DecodeStreamError :: SerializationError ( format ! ( " " streams streams len ( ) ) ) ) ; } let ( subnet , encoded_stream ) = streams . streams . into_iter ( ) . next ( ) . unwrap ( ) ; let header : StreamHeader = decode_stream_header ( encoded_stream . header . as_ref ( ) ) . map_err ( | err | { DecodeStreamError :: SerializationError ( format ! ( " " err ) ) } ) ? ; let mut messages = encoded_stream . messages . keys ( ) . next ( ) . map ( | idx | StreamIndexedQueue :: with_begin ( * idx ) ) ; if let Some ( ref mut queue ) = messages { for ( idx , bytes ) in encoded_stream . messages . into_iter ( ) { let msg = decode_message ( bytes . as_ref ( ) ) . map_err ( | err | { DecodeStreamError :: SerializationError ( format ! ( " " idx subnet err ) ) } ) ? ; if idx != queue . end ( ) { return Err ( DecodeStreamError :: SerializationError ( format ! ( " " idx queue end ( ) ) ) ) ; } queue . push ( msg ) ; } if queue . begin ( ) < header . begin || header . end < queue . end ( ) { return Err ( DecodeStreamError :: SerializationError ( format ! ( " " queue begin ( ) queue end ( ) header begin header end ) ) ) ; } } Ok ( ( subnet , StreamSlice :: from_parts ( header , messages ) ) ) }
Recovers a stream slice from its canonical form.
Recovers a stream slice from its canonical form .
t
&LabeledTree<Vec<u8>>
t
&LabeledTree<Vec<u8>>