Struct GfMatrix 

pub struct GfMatrix {
    pub rows: usize,
    pub cols: usize,
    pub data: Vec<u16>,
}

A matrix over GF(2^16), stored in row-major order.

Fields

rows: usize

cols: usize

data: Vec<u16>

Row-major data: element at (r, c) is data[r * cols + c].

Implementations

impl GfMatrix

pub fn zeros(rows: usize, cols: usize) -> Self

Create a zero matrix.

pub fn identity(n: usize) -> Self

Create an identity matrix.

pub fn get(&self, row: usize, col: usize) -> u16

Get element at (row, col).

pub fn set(&mut self, row: usize, col: usize, val: u16)

Set element at (row, col).

pub fn par2_encoding_matrix( input_count: usize, recovery_exponents: &[u32], ) -> Self

Build the PAR2 encoding matrix.

PAR2 recovery blocks use: recovery[e] = Σ (input[i] * c[i]^e) where c[i] are per-input-slice constants assigned by the PAR2 spec.

The encoding matrix has input_count columns (one per data block). Row i for i < input_count is the identity (data blocks are passed through). Row input_count + r is the recovery row for exponent recovery_exponents[r]: [c[0]^exp, c[1]^exp, c[2]^exp, ..., c[k-1]^exp]

pub fn select_rows(&self, row_indices: &[usize]) -> Self

Select specific rows from this matrix, returning a new matrix.

pub fn invert(&self) -> Option<Self>

Invert this square matrix using Gaussian elimination over GF(2^16). Returns None if the matrix is singular.

Trait Implementations

impl Clone for GfMatrix

fn clone(&self) -> GfMatrix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GfMatrix

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

Formats the value using the given formatter.