Struct CellDescriptor

#[repr(C)]
pub struct CellDescriptor {
    pub d1: u8,
    pub d2: u8,
}

Tightly packed info about a cell.

Fields

d1: u8

First descriptor byte with a generic info about cell.

d2: u8

Second descriptor byte with a packed data size.

Implementations

impl CellDescriptor

pub const REF_COUNT_MASK: u8 = 7u8

Bit mask to store the number of references in the descriptor.

pub const IS_EXOTIC_MASK: u8 = 8u8

Bit mask to store the is_exotic flag in the descriptor.

pub const STORE_HASHES_MASK: u8 = 16u8

Bit mask to store the store_hashes flag in the descriptor.

pub const LEVEL_MASK: u8 = 224u8

de Brujn level presence mask in the descriptor.

pub const fn compute_d1( level_mask: LevelMask, is_exotic: bool, ref_count: u8, ) -> u8

Computes d1 descriptor byte from parts

pub const fn compute_d2(bit_len: u16) -> u8

Computes d2 descriptor byte from cell length in bits

pub const fn new(bytes: [u8; 2]) -> Self

Constructs cell descriptor from descriptor bytes.

pub fn cell_type(self) -> CellType

Computes cell type.

pub const fn reference_count(self) -> u8

Computes child cell count.

pub const fn hash_count(self) -> u8

Computes hash count.

NOTE: Guaranteed to be in range 1..=4.

pub const fn is_exotic(self) -> bool

Returns whether the cell is not Ordinary.

pub const fn is_pruned_branch(self) -> bool

Returns whether this cell is a pruned branch cell

pub const fn is_merkle(self) -> bool

Returns whether this cell type is Merkle proof or Merkle update.

pub const fn is_absent(self) -> bool

Returns whether this cell refers to some external data.

pub const fn store_hashes(self) -> bool

Returns whether this cell should store hashes in data.

pub const fn level_mask(self) -> LevelMask

Computes level mask.

pub const fn is_aligned(self) -> bool

Returns whether this cell’s data is 8-bit aligned.

pub const fn byte_len(self) -> u8

Returns this cell’s data length in bytes.

Trait Implementations

impl Clone for CellDescriptor

fn clone(&self) -> CellDescriptor

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CellDescriptor

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

Formats the value using the given formatter.

impl Hash for CellDescriptor

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Copy for CellDescriptor