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// Copyright 2017 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef _BSDIFF_BZ2_COMPRESSOR_H_
#define _BSDIFF_BZ2_COMPRESSOR_H_
#include <bzlib.h>
#include <stdint.h>
#include <vector>
#include "bsdiff/compressor_buffer.h"
#include "bsdiff/compressor_interface.h"
namespace bsdiff {
// An in-memory class to wrap the low-level bzip2 compress functions. This class
// allows to stream uncompressed data to it and then retrieve all the compressed
// data at the end of the compression step. For that, all the compressed data
// is stored in memory.
class BZ2Compressor : public CompressorInterface {
public:
BZ2Compressor();
~BZ2Compressor() override;
// CompressorInterface overrides.
bool Write(const uint8_t* buf, size_t size) override;
bool Finish() override;
const std::vector<uint8_t>& GetCompressedData() override;
CompressorType Type() const override { return CompressorType::kBZ2; }
private:
// The low-level bzip2 stream.
bz_stream bz_strm_;
// Whether the bz_strm_ is initialized.
bool bz_strm_initialized_{false};
CompressorBuffer comp_buffer_;
};
} // namespace bsdiff
#endif // _BSDIFF_BZ2_COMPRESSOR_H_
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