respk 0.1.2

Manage resource files using a fast, custom open format designed especially for use in games.
Documentation 
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//! Provides methods for compressing and decompressing resource file data.
//! Compression is done using the LZ4 algorithm, which trades some compression size for high speed decompressing.
use Error;
use lz4;
use std::io::{self, Read};


/// Compress an input stream and return the results and the uncompressed size.
pub fn compress<R: Read>(mut input: R) -> Result<(u64, Vec<u8>), Error> {
    let mut encoder = lz4::EncoderBuilder::new().build(Vec::new())
        .map_err(|_| Error::CompressionError)?;

    let size = io::copy(&mut input, &mut encoder)
        .map_err(|_| Error::CompressionError)?;

    let (buf, result) = encoder.finish();
    result.map_err(|_| Error::CompressionError)?;

    Ok((size, buf))
}

/// Decompress an input stream and return the results.
pub fn decompress<R: Read>(input: R) -> Result<Vec<u8>, Error> {
    let mut buf = Vec::new();

    let mut decoder = lz4::Decoder::new(input)
        .map_err(|_| Error::DecompressionError)?;

    io::copy(&mut decoder, &mut buf)
        .map_err(|_| Error::DecompressionError)?;

    Ok(buf)
}