Struct LzssDecoder 

pub struct LzssDecoder { /* private fields */ }

LZSS sliding window decoder.

Implementations

impl LzssDecoder

pub fn new(window_size: usize) -> Self

Create a new LZSS decoder with the specified window size.

pub fn rar29() -> Self

Create decoder for RAR 2.9 format.

pub fn rar50() -> Self

Create decoder for RAR 5.0 format.

pub fn reset(&mut self)

Reset the decoder for reuse, avoiding reallocation. Note: Window contents are NOT cleared - we only read after writing.

pub fn enable_output(&mut self, capacity: usize)

Enable output accumulation for extracting files larger than window.

pub fn write_literal(&mut self, byte: u8)

Write a literal byte to the window.

pub fn flush_to_output(&mut self, up_to: u64)

Flush data from window to output, up to the given absolute position. This is called after filters have been applied.

pub fn window_mut(&mut self) -> &mut [u8]

Get mutable access to the window for filter execution.

pub fn window_mask(&self) -> u32

Get the window mask (for filter positioning).

pub fn flushed_pos(&self) -> u64

Get how much has been flushed to output.

pub fn write_filtered_to_output(&mut self, data: &[u8], position: u64)

Write filtered data directly to output, bypassing the window. This is used for VM filter output which should NOT modify the window.

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

Get read-only access to the window for filter execution.

pub fn copy_match(&mut self, distance: u32, length: u32) -> Result<()>

Copy bytes from a previous position in the window. Optimized for both overlapping and non-overlapping copies.

pub fn position(&self) -> usize

Get the current window position.

pub fn total_written(&self) -> u64

Get total bytes written.

pub fn get_output(&self, start: u64, len: usize) -> Vec<u8>

Get a byte at the specified offset from current position (going back). Call this after decompression to get the output.

pub fn take_output(&mut self) -> Vec<u8>

Take ownership of the accumulated output buffer. More efficient than get_output() when you need all output.

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

Get read access to the accumulated output buffer.

pub fn output_mut(&mut self) -> &mut [u8]

Get mutable access to the output buffer for filter execution.

pub fn get_recent(&self, len: usize) -> Vec<u8>

Get the most recent len bytes from the window.