Struct PQCode 

pub struct PQCode { /* private fields */ }

A compressed vector code from Product Quantization.

Each byte represents an index into the corresponding subspace codebook. For 256 centroids (default), this is one byte per segment.

Implementations

impl PQCode

pub fn new(codes: Vec<u8>, bits_per_code: u8) -> Self

Create a new PQ code from raw indices.

Arguments

• codes: Centroid indices, one per segment
• bits_per_code: Number of bits per index (typically 8 for 256 centroids)

pub fn num_segments(&self) -> usize

Get the number of segments.

pub fn get(&self, segment: usize) -> Option<u8>

Get the code (centroid index) for a segment.

pub fn as_slice(&self) -> &[u8]

Get all codes as a slice.

pub fn to_bytes(&self) -> Vec<u8>

Convert to bytes for storage.

pub fn from_bytes(bytes: &[u8], num_segments: usize, bits_per_code: u8) -> Self

Create from bytes.

Arguments

• bytes: Packed code bytes
• num_segments: Number of segments (codes)
• bits_per_code: Number of bits per code

Trait Implementations

impl Clone for PQCode

fn clone(&self) -> PQCode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PQCode

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

Formats the value using the given formatter.

impl PartialEq for PQCode

fn eq(&self, other: &PQCode) -> 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 PQCode

impl StructuralPartialEq for PQCode