58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
//
|
|
// Copyright (C) 2020 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.
|
|
//
|
|
|
|
#pragma once
|
|
|
|
#include <libsnapshot/cow_reader.h>
|
|
|
|
namespace android {
|
|
namespace snapshot {
|
|
|
|
class IByteStream {
|
|
public:
|
|
virtual ~IByteStream() {}
|
|
|
|
// Read up to |length| bytes, storing the number of bytes read in the out-
|
|
// parameter. If the end of the stream is reached, 0 is returned.
|
|
virtual bool Read(void* buffer, size_t length, size_t* read) = 0;
|
|
|
|
// Size of the stream.
|
|
virtual size_t Size() const = 0;
|
|
};
|
|
|
|
class IDecompressor {
|
|
public:
|
|
virtual ~IDecompressor() {}
|
|
|
|
// Factory methods for decompression methods.
|
|
static std::unique_ptr<IDecompressor> Uncompressed();
|
|
static std::unique_ptr<IDecompressor> Gz();
|
|
static std::unique_ptr<IDecompressor> Brotli();
|
|
|
|
// |output_bytes| is the expected total number of bytes to sink.
|
|
virtual bool Decompress(size_t output_bytes) = 0;
|
|
|
|
void set_stream(IByteStream* stream) { stream_ = stream; }
|
|
void set_sink(IByteSink* sink) { sink_ = sink; }
|
|
|
|
protected:
|
|
IByteStream* stream_ = nullptr;
|
|
IByteSink* sink_ = nullptr;
|
|
};
|
|
|
|
} // namespace snapshot
|
|
} // namespace android
|