//
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// Copyright (C) 2009 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef UPDATE_ENGINE_PAYLOAD_CONSUMER_BZIP_EXTENT_WRITER_H_
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#define UPDATE_ENGINE_PAYLOAD_CONSUMER_BZIP_EXTENT_WRITER_H_
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#include <bzlib.h>
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#include <memory>
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#include <utility>
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#include <brillo/secure_blob.h>
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#include "update_engine/common/utils.h"
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#include "update_engine/payload_consumer/extent_writer.h"
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// BzipExtentWriter is a concrete ExtentWriter subclass that bzip-decompresses
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// what it's given in Write. It passes the decompressed data to an underlying
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// ExtentWriter.
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namespace chromeos_update_engine {
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class BzipExtentWriter : public ExtentWriter {
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public:
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explicit BzipExtentWriter(std::unique_ptr<ExtentWriter> next)
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: next_(std::move(next)) {
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memset(&stream_, 0, sizeof(stream_));
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}
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~BzipExtentWriter() override;
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bool Init(FileDescriptorPtr fd,
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const google::protobuf::RepeatedPtrField<Extent>& extents,
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uint32_t block_size) override;
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bool Write(const void* bytes, size_t count) override;
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private:
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std::unique_ptr<ExtentWriter> next_; // The underlying ExtentWriter.
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bz_stream stream_; // the libbz2 stream
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brillo::Blob input_buffer_;
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};
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} // namespace chromeos_update_engine
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#endif // UPDATE_ENGINE_PAYLOAD_CONSUMER_BZIP_EXTENT_WRITER_H_
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