Add FieldOffsets class

include/Nazara/Utility/FieldOffsets.hpp

@@ -0,0 +1,52 @@
+// Copyright (C) 2019 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Utility module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_FIELDOFFSETS_HPP
+#define NAZARA_FIELDOFFSETS_HPP
+
+#include <Nazara/Utility/Config.hpp>
+#include <Nazara/Utility/Enums.hpp>
+
+namespace Nz
+{
+	class NAZARA_UTILITY_API FieldOffsets
+	{
+		public:
+			inline FieldOffsets(StructLayout layout);
+			FieldOffsets(const FieldOffsets&) = default;
+			FieldOffsets(FieldOffsets&&) = default;
+			~FieldOffsets() = default;
+
+			std::size_t AddField(StructFieldType type);
+			std::size_t AddFieldArray(StructFieldType type, std::size_t arraySize);
+			std::size_t AddMatrix(StructFieldType cellType, unsigned int columns, unsigned int rows, bool columnMajor);
+			std::size_t AddMatrixArray(StructFieldType cellType, unsigned int columns, unsigned int rows, bool columnMajor, std::size_t arraySize);
+			std::size_t AddStruct(const FieldOffsets& fieldStruct);
+			std::size_t AddStructArray(const FieldOffsets& fieldStruct, std::size_t arraySize);
+
+			inline std::size_t GetLargestFieldAlignement() const;
+			inline std::size_t GetSize() const;
+
+			FieldOffsets& operator=(const FieldOffsets&) = default;
+			FieldOffsets& operator=(FieldOffsets&&) = default;
+
+			static std::size_t GetAlignement(StructLayout layout, StructFieldType fieldType);
+			static std::size_t GetCount(StructFieldType fieldType);
+			static std::size_t GetSize(StructFieldType fieldType);
+
+		private:
+			static inline std::size_t Align(std::size_t source, std::size_t alignment);
+
+			std::size_t m_largestFieldAlignment;
+			std::size_t m_offsetRounding;
+			std::size_t m_size;
+			StructLayout m_layout;
+	};
+}
+
+#include <Nazara/Utility/FieldOffsets.inl>
+
+#endif // NAZARA_FIELDOFFSETS_HPP