Struct BlockHashPositionArray 

pub struct BlockHashPositionArray { /* private fields */ }

A simple struct representing a position array of a block hash.

This type is not a part of the FuzzyHashCompareTarget struct but can be a good example to use internal efficient implementation.

It’s (currently) used internally on the FuzzyHashData::compare() method family (comparing two fuzzy hash objects) for the “shortcut path” (when the block sizes are different but near).

See also:

• BlockHashPositionArrayData
• BlockHashPositionArrayImpl

Compatibility Notice

This type is going to be completely private on the next major release. If you need to experiment with internal hashing functions, just vendor the source code for your needs.

Implementations

impl BlockHashPositionArray

pub fn new() -> Self

Creates a new position array object with empty contents.

pub fn clear(&mut self)

Clears the current representation of the block hash.

pub fn init_from(&mut self, blockhash: &[u8])

Clear and initialize (encode) the object from a given slice.

Usage Constraints

• The length of blockhash must not exceed 64.
• All elements in blockhash must be less than block_hash::ALPHABET_SIZE.

Trait Implementations

impl BlockHashPositionArrayData for BlockHashPositionArray

fn representation(&self) -> &[u64; 64]

Returns the raw representation of the block hash position array.

fn len(&self) -> u8

Returns the length of the block hash.

fn is_empty(&self) -> bool

Returns whether the block hash is empty.

fn is_valid(&self) -> bool

Performs full validity checking of a position array object.

fn is_valid_and_normalized(&self) -> bool

Performs full validity checking and the normalization test of a position array object.

impl Debug for BlockHashPositionArray

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

Formats the value using the given formatter.

impl Default for BlockHashPositionArray

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for BlockHashPositionArray

fn eq(&self, other: &BlockHashPositionArray) -> 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 Eq for BlockHashPositionArray

impl StructuralPartialEq for BlockHashPositionArray