Struct CustomFseTables 

pub struct CustomFseTables {
    pub ll_table: Option<Arc<FseTable>>,
    pub of_table: Option<Arc<FseTable>>,
    pub ml_table: Option<Arc<FseTable>>,
}

Custom FSE tables for sequence encoding.

Allows overriding the predefined FSE tables used for literal lengths (LL), offsets (OF), and match lengths (ML) in Zstd sequence encoding.

When a custom table is None, the predefined table is used instead.

Example

use haagenti_zstd::{CustomFseTables, ZstdCompressor};
use haagenti_zstd::fse::FseTable;

// Build custom tables from normalized symbol distributions
let ll_dist = vec![4i16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4]; // 16 symbols, sum=64
let ll_table = FseTable::from_predefined(&ll_dist, 6).unwrap();

let custom_tables = CustomFseTables::new()
    .with_ll_table(ll_table);

let compressor = ZstdCompressor::with_custom_tables(custom_tables);

Fields

ll_table: Option<Arc<FseTable>>

Custom literal length FSE table.

of_table: Option<Arc<FseTable>>

Custom offset FSE table.

ml_table: Option<Arc<FseTable>>

Custom match length FSE table.

Implementations

impl CustomFseTables

pub fn new() -> Self

Create empty custom tables (all use predefined).

pub fn with_ll_table(self, table: FseTable) -> Self

Set custom literal length table.

pub fn with_of_table(self, table: FseTable) -> Self

Set custom offset table.

pub fn with_ml_table(self, table: FseTable) -> Self

Set custom match length table.

pub fn has_custom_tables(&self) -> bool

Check if any custom tables are set.

Trait Implementations

impl Clone for CustomFseTables

fn clone(&self) -> CustomFseTables

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CustomFseTables

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

Formats the value using the given formatter.

impl Default for CustomFseTables

fn default() -> CustomFseTables

Returns the “default value” for a type.