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60 lines
1.9 KiB
60 lines
1.9 KiB
// |
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// Copyright (C) 2015 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_XZ_EXTENT_WRITER_H_ |
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#define UPDATE_ENGINE_PAYLOAD_CONSUMER_XZ_EXTENT_WRITER_H_ |
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#include <xz.h> |
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#include <memory> |
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#include <vector> |
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#include <brillo/secure_blob.h> |
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#include "update_engine/payload_consumer/extent_writer.h" |
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// XzExtentWriter is a concrete ExtentWriter subclass that xz-decompresses |
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// what it's given in Write using xz-embedded. Note that xz-embedded only |
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// supports files with either no CRC or CRC-32. It passes the decompressed data |
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// to an underlying ExtentWriter. |
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namespace chromeos_update_engine { |
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class XzExtentWriter : public ExtentWriter { |
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public: |
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explicit XzExtentWriter(std::unique_ptr<ExtentWriter> underlying_writer) |
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: underlying_writer_(std::move(underlying_writer)) {} |
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~XzExtentWriter() override; |
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bool Init(FileDescriptorPtr fd, |
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const std::vector<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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bool EndImpl() override; |
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private: |
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// The underlying ExtentWriter. |
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std::unique_ptr<ExtentWriter> underlying_writer_; |
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// The opaque xz decompressor struct. |
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xz_dec* stream_{nullptr}; |
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brillo::Blob input_buffer_; |
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DISALLOW_COPY_AND_ASSIGN(XzExtentWriter); |
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}; |
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} // namespace chromeos_update_engine |
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#endif // UPDATE_ENGINE_PAYLOAD_CONSUMER_XZ_EXTENT_WRITER_H_
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