oodle

A Rust wrapper for the Oodle compression library. Loads the Oodle shared library at runtime via libloading, providing safe access to compress and decompress functions.

Installation

cargo add oodle

Usage

You must have the Oodle shared library (.dll, .so, or .dylib) available on your system. The library is loaded at runtime by path.

Loading the library

use oodle::Oodle;

let oodle = Oodle::load("path/to/oo2core.dll")?;

Oodle is Send + Sync, so it can be shared across threads.

Compressing data

use oodle::{Oodle, OodleCompressor, OodleCompressionLevel};

let oodle = Oodle::load("path/to/oo2core.dll")?;
let input = b"some data to compress";

let max_size = oodle.get_compressed_buffer_size_needed(OodleCompressor::Kraken, input.len());
let mut output = vec![0u8; max_size];

let compressed_size = oodle.compress(
    OodleCompressor::Kraken,
    OodleCompressionLevel::Normal,
    input,
    &mut output,
)?;
output.truncate(compressed_size);

Decompressing data

use oodle::Oodle;

let oodle = Oodle::load("path/to/oo2core.dll")?;

let mut decompressed = vec![0u8; original_size];
let result = oodle.decompress(&compressed_data, &mut decompressed)?;

Decompressing with options

use oodle::{Oodle, OodleFuzzSafe, OodleCheckCrc, OodleVerbosity, OodleDecodeThreadPhase};

let oodle = Oodle::load("path/to/oo2core.dll")?;

let mut decompressed = vec![0u8; original_size];
let result = oodle.decompress_with_options(
    &compressed_data,
    &mut decompressed,
    OodleFuzzSafe::Yes,
    OodleCheckCrc::Yes,
    OodleVerbosity::None,
    OodleDecodeThreadPhase::All,
)?;

Other utilities

// Get the decode buffer size (with corruption safety margin)
let buf_size = oodle.get_decode_buffer_size(OodleCompressor::Kraken, raw_size, true);

// Get the scratch memory bound for compression
let scratch = oodle.get_compress_scratch_mem_bound(
    OodleCompressor::Kraken,
    OodleCompressionLevel::Normal,
    raw_size,
);

Compressors

Compression levels

HyperFast4 (-4) through HyperFast1 (-1), None (0), SuperFast (1), VeryFast (2), Fast (3), Normal (4), Optimal1 (5) through Optimal5 (9)

Error handling

Oodle::load returns Result<Oodle, Error> where Error is:

• LibLoadError — the shared library could not be loaded
• FunctionLoadError — a required function symbol was not found in the library

compress and decompress return Result<usize, Error> where additional variants are:

• CompressFailed — Oodle returned OODLELZ_FAILED (0)
• DecompressFailed — Oodle returned OODLELZ_FAILED (0)

Error implements Display and std::error::Error.

Running integration tests

Integration tests require the Oodle shared library. They are #[ignore]d by default.

OODLE_LIB_PATH=/path/to/oo2core.so cargo test -- --ignored

License

MIT