Struct HuffmanCodeTable 

pub struct HuffmanCodeTable {
    pub codes: Vec<(u32, u8)>,
}

Lookup table: for each symbol 0..=255, (code_bits, code_length). Symbols that do not appear have code_length == 0.

Fields

codes: Vec<(u32, u8)>

Indexed by symbol value (0..=255). (code_bits, code_length).

Implementations

impl HuffmanCodeTable

pub fn from_lengths(lengths: &[u8; 256]) -> Self

Build a canonical Huffman table from code lengths. Symbols with length == 0 are not encoded.

pub fn from_data(data: &[u8]) -> Option<Self>

Build a Huffman table directly from raw data bytes. Returns None if data is empty.

pub fn lookup(&self, symbol: u8) -> Option<(u32, u8)>

Look up the code for a given symbol. Returns None if the symbol is not in the table.

Trait Implementations

impl Clone for HuffmanCodeTable

fn clone(&self) -> HuffmanCodeTable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HuffmanCodeTable

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

Formats the value using the given formatter.