NSData lzfse compress & decompress

gistfile1.txt

extension NSData {
    func lzfseCompressed() -> NSData {
        let sourceBuffer: UnsafePointer<UInt8> = UnsafePointer<UInt8>(self.bytes.assumingMemoryBound(to: UInt8.self))
        let sourceBufferSize: Int = self.length
        
        let destinationBuffer: UnsafeMutablePointer<UInt8> = UnsafeMutablePointer<UInt8>.allocate(capacity: sourceBufferSize)
        let destinationBufferSize: Int = sourceBufferSize
        
        let status = compression_encode_buffer(destinationBuffer, destinationBufferSize, sourceBuffer, sourceBufferSize, nil, COMPRESSION_LZFSE)
        
        if status == 0 {
            print("Error with status: \(status)")
            fatalError()
        }
        print("Original size: \(sourceBufferSize) | Compressed size: \(status)")
        return NSData(bytesNoCopy: destinationBuffer, length: status)
    }
    
    func lzfseDecompressed() -> NSData {
        let sourceBuffer: UnsafePointer<UInt8> = UnsafePointer<UInt8>(self.bytes.assumingMemoryBound(to: UInt8.self))
        let sourceBufferSize: Int = self.length
        
        //assuming 20x is OK?
        let destinationBufferSize: Int = 20 * sourceBufferSize
        let destinationBuffer: UnsafeMutablePointer<UInt8> = UnsafeMutablePointer<UInt8>.allocate(capacity: destinationBufferSize)
        
        let status = compression_decode_buffer(destinationBuffer, destinationBufferSize, sourceBuffer, sourceBufferSize, nil, COMPRESSION_LZFSE)
        
        if status == 0 {
            print("Error with status: \(status)")
            fatalError()
        }
        print("Original size: \(sourceBufferSize) | Decompressed size: \(status)")
        return NSData(bytesNoCopy: destinationBuffer, length: status)
    }
}