Struct FlatLayoutReader 

pub struct FlatLayoutReader<S>
where
    S: IpldStore,
{ /* private fields */ }

A reader for the flat DAG layout.

The reader maintains three state variables:

• The current byte position, byte_cursor.
• The index of the current chunk within the node’s children array, chunk_index.
• The distance (in bytes) of the current chunk index from the start, chunk_distance.

These state variables are used to determine the current chunk to read from and the byte position within the chunk to read from. It basically enables seeking to any byte position within the chunk array.

 Chunk Index    = 1
 Chunk Distance = 3
           │
           │
 0         ▼ 1                 2
┌──┬──┬──┐  ┌──┬──┬──┬──┬──┐  ┌──┬──┬──┬──┐
│0 │1 │2 │  │3 │4 │5 │6 │7 │  │8 │9 │10│11│
└──┴──┴──┘  └──┴──┴──┴──┴──┘  └──┴──┴──┴──┘
                   ▲
                   │
                   │
               Byte Cursor = 5

Trait Implementations

impl<S> AsyncRead for FlatLayoutReader<S>

where S: IpldStore + Sync,

fn poll_read( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut ReadBuf<'_>, ) -> Poll<Result<()>>

Attempts to read from the AsyncRead into buf.

impl<S> AsyncSeek for FlatLayoutReader<S>

where S: IpldStore + Sync,

fn start_seek(self: Pin<&mut Self>, position: SeekFrom) -> Result<()>

Attempts to seek to an offset, in bytes, in a stream.

fn poll_complete(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<u64>>

Waits for a seek operation to complete.