Enum ElementLength 

pub enum ElementLength {
    Fixed(u32),
    Variable8,
    Variable16,
    Variable24,
    Variable32,
    Callback(fn(id: u8) -> ElementLength),
}

Type of length used by a specific message codec. This describes how the length of an element should be encoded in the packet.

Variants

Fixed(u32)

A fixed length element, the length is not written in the header.

Variable8

The length is encoded on 8 bits in the element’s header.

Variable16

The length is encoded on 16 bits in the element’s header.

Variable24

The length is encoded on 24 bits in the element’s header.

Variable32

The length is encoded on 32 bits in the element’s header.

Callback(fn(id: u8) -> ElementLength)

The real length of the element is queried dynamically with a callback, given the element’s identifier.

Implementations

impl ElementLength

pub fn read(self, reader: impl Read, id: u8) -> Result<u32>

Read the length from a given reader.

pub fn write(self, writer: impl Write, len: u32) -> Result<()>

Write the length to the given writer.

pub fn len(&self) -> usize

Return the size in bytes of this type of length.

Trait Implementations

impl Clone for ElementLength

fn clone(&self) -> ElementLength

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ElementLength

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

Formats the value using the given formatter.

impl PartialEq for ElementLength

fn eq(&self, other: &ElementLength) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ElementLength

impl Eq for ElementLength

impl StructuralPartialEq for ElementLength