blob: d854dd2c140fff4117645f0c7c537d05965657af [file] [log] [blame]
//
// Copyright (C) 2009 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#ifndef UPDATE_ENGINE_BZIP_EXTENT_WRITER_H_
#define UPDATE_ENGINE_BZIP_EXTENT_WRITER_H_
#include <bzlib.h>
#include <vector>
#include <chromeos/secure_blob.h>
#include "update_engine/extent_writer.h"
#include "update_engine/utils.h"
// BzipExtentWriter is a concrete ExtentWriter subclass that bzip-decompresses
// what it's given in Write. It passes the decompressed data to an underlying
// ExtentWriter.
namespace chromeos_update_engine {
class BzipExtentWriter : public ExtentWriter {
public:
explicit BzipExtentWriter(ExtentWriter* next) : next_(next) {
memset(&stream_, 0, sizeof(stream_));
}
~BzipExtentWriter() {}
bool Init(FileDescriptorPtr fd,
const std::vector<Extent>& extents,
uint32_t block_size);
bool Write(const void* bytes, size_t count);
bool EndImpl();
private:
ExtentWriter* const next_; // The underlying ExtentWriter.
bz_stream stream_; // the libbz2 stream
chromeos::Blob input_buffer_;
};
} // namespace chromeos_update_engine
#endif // UPDATE_ENGINE_BZIP_EXTENT_WRITER_H_