Core: Add EmptyStream class

include/Nazara/Core/EmptyStream.hpp

@@ -0,0 +1,46 @@
+// Copyright (C) 2019 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_EMPTYSTREAM_HPP
+#define NAZARA_EMPTYSTREAM_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/Stream.hpp>
+
+namespace Nz
+{
+	class NAZARA_CORE_API EmptyStream : public Stream
+	{
+		public:
+			inline EmptyStream();
+			EmptyStream(const EmptyStream&) = default;
+			EmptyStream(EmptyStream&&) noexcept = default;
+			~EmptyStream() = default;
+
+			void Clear();
+
+			bool EndOfStream() const override;
+
+			UInt64 GetCursorPos() const override;
+			UInt64 GetSize() const override;
+
+			bool SetCursorPos(UInt64 offset) override;
+
+			EmptyStream& operator=(const EmptyStream&) = default;
+			EmptyStream& operator=(EmptyStream&&) noexcept = default;
+
+		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;
+
+			UInt64 m_size;
+	};
+}
+
+#include <Nazara/Core/EmptyStream.inl>
+
+#endif // NAZARA_EMPTYSTREAM_HPP