--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/XAttrs.h	Sun Dec 10 22:23:32 2023 +0100
@@ -0,0 +1,67 @@
+/**
+ * ShaderShark
+ * Copyright © 2023 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include "Buffer.h"
+
+class XAttrs {
+public:
+
+	class Null;
+
+	class Attribute {
+	public:
+		virtual ~Attribute();
+		const std::string getName();
+		const std::string getValue(bool reload = false);
+		bool exists(bool reload = false);
+		bool missing(bool reload = false);
+		Attribute& operator=(const std::string& value);
+		Attribute& operator=(const Attribute& value);
+		operator std::string();
+		friend std::ostream& operator<<(std::ostream& s, Attribute& a);
+		friend std::ostream& operator>>(Attribute& a, std::ostream& s);
+	private:
+		class Impl;
+		std::shared_ptr<Impl> impl;
+		Attribute();
+		friend XAttrs;
+		friend Null;
+	};
+
+	class Null : public Attribute {
+	public:
+		Null();
+	};
+
+	XAttrs(const std::string& fileName, const std::string& nameSpace = "user");
+	virtual ~XAttrs();
+	const std::string getFileName() const;
+	Attribute& operator[](std::string name);
+	Attribute& operator[](std::size_t index);
+	size_t size(bool reload = false);
+	Attribute* begin();
+	Attribute* end();
+private:
+	class Impl;
+	std::shared_ptr<Impl> impl;
+	friend Attribute;
+};