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59 lines
1.6 KiB
59 lines
1.6 KiB
// Copyright 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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#pragma once
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#include "android/base/Compiler.h"
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#include "android/base/files/Stream.h"
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#include <vector>
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namespace android {
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namespace base {
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// An implementation of the Stream interface on top of a vector.
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class MemStream : public Stream {
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public:
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using Buffer = std::vector<char>;
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MemStream(int reserveSize = 512);
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MemStream(Buffer&& data);
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MemStream(MemStream&& other) = default;
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MemStream& operator=(MemStream&& other) = default;
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int writtenSize() const;
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int readPos() const;
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int readSize() const;
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// Stream interface implementation.
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ssize_t read(void* buffer, size_t size) override;
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ssize_t write(const void* buffer, size_t size) override;
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// Snapshot support.
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void save(Stream* stream) const;
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void load(Stream* stream);
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const Buffer& buffer() const { return mData; }
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private:
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DISALLOW_COPY_AND_ASSIGN(MemStream);
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Buffer mData;
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int mReadPos = 0;
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};
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} // namespace base
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} // namespace android
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