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https://github.com/OpenRCT2/OpenRCT2
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71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
#pragma region Copyright (c) 2014-2016 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#pragma once
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#include "../common.h"
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#include "IStream.hpp"
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enum MEMORY_ACCESS
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{
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MEMORY_ACCESS_READ = 1 << 0,
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MEMORY_ACCESS_WRITE = 1 << 1,
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MEMORY_ACCESS_OWNER = 1 << 2,
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};
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/**
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* A stream for reading and writing to files. Wraps an SDL_RWops, SDL2's cross platform file stream.
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*/
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class MemoryStream : public IStream
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{
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private:
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uint16 _access;
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size_t _dataCapacity;
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size_t _dataSize;
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void * _data;
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void * _position;
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public:
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MemoryStream();
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MemoryStream(const MemoryStream ©);
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explicit MemoryStream(size_t capacity);
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MemoryStream(void * data, size_t dataSize, uint32 access = MEMORY_ACCESS_READ);
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MemoryStream(const void * data, size_t dataSize);
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virtual ~MemoryStream();
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void * GetData() const;
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void * TakeData();
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///////////////////////////////////////////////////////////////////////////
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// ISteam methods
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///////////////////////////////////////////////////////////////////////////
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bool CanRead() const override;
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bool CanWrite() const override;
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uint64 GetLength() const override;
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uint64 GetPosition() const override;
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void SetPosition(uint64 position) override;
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void Seek(sint64 offset, int origin) override;
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void Read(void * buffer, uint64 length) override;
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void Write(const void * buffer, uint64 length) override;
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uint64 TryRead(void * buffer, uint64 length) override;
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private:
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void EnsureCapacity(size_t capacity);
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};
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