Struct WireIndex

pub struct WireIndex {
    pub vectored_idx: usize,
    pub slice_idx: usize,
}

An index of a buffer or vectored buffers.

This type is created from a Wire or Vectored Reader/Writer type. Its primary use is to provide a mechanism for advancing a slice or vectored slice up by the amount consumed by the Reader/Writer without causing any lifetime issues.

Readers and Writers carry a reference to the buffer they are reading, which means that no mutations can be performed on the referenced buffer while a Reader is in scope. Converting a reader into a WireIndex provides a mechanism to drop the Reader while retaining the index that the Reader had reached. Once the buffer has been mutated (e.g. additional data being written into it), a slice of the new contents (starting at the index stored in the WireIndex) can be used to create a new Reader. That reader can then continue to extract data from the buffer.

Fields

vectored_idx: usize

The index of which buffer in the set of vectored buffers the reader or writer was at.

If the given WireIndex was created from a WireReader or WireWriter and not a VectoredReader or VectoredWriter, this value will always be set to 0.

slice_idx: usize

The index within the buffer that the reader or writer was at.

Trait Implementations

impl From<VectoredReader<'_>> for WireIndex

fn from(reader: VectoredReader<'_>) -> Self

Converts to this type from the input type.

impl From<VectoredWriter<'_>> for WireIndex

fn from(writer: VectoredWriter<'_>) -> Self

Converts to this type from the input type.

impl From<WireReader<'_>> for WireIndex

fn from(reader: WireReader<'_>) -> Self

Converts to this type from the input type.

impl From<WireWriter<'_>> for WireIndex

fn from(writer: WireWriter<'_>) -> Self

Converts to this type from the input type.