MemoryView.hpp

// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Engine - Core module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_MEMORYVIEW_HPP
#define NAZARA_MEMORYVIEW_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Core/Stream.hpp>

namespace Nz
{
    class NAZARA_CORE_API MemoryView : public Stream
    {
        public:
            MemoryView(void* ptr, UInt64 size);
            MemoryView(const void* ptr, UInt64 size);
            MemoryView(const MemoryView&) = delete;
            MemoryView(MemoryView&&) = delete; 
            ~MemoryView() = default;

            bool EndOfStream() const override;

            UInt64 GetCursorPos() const override;
            UInt64 GetSize() const override;

            bool SetCursorPos(UInt64 offset) override;

            MemoryView& operator=(const MemoryView&) = delete;
            MemoryView& operator=(MemoryView&&) = delete; 

        private:
            void FlushStream() override;
            std::size_t ReadBlock(void* buffer, std::size_t size) override;
            std::size_t WriteBlock(const void* buffer, std::size_t size) override;

            UInt8* m_ptr;
            UInt64 m_pos;
            UInt64 m_size;
    };
}

#endif // NAZARA_MEMORYVIEW_HPP