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