replaced some pointers to mutables, some first thoughts about cursors

src/cursor.h

@@ -0,0 +1,50 @@
+/*
+ * LMDB Abstraction Layer.
+ * Copyright (C) 2023  Yury Gubich <blue@macaw.me>
+ *
+ * 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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/>.
+ */
+
+#ifndef LMDBAL_CURSOR_H
+#define LMDBAL_CURSOR_H
+
+#include "base.h"
+#include "storage.h"
+
+namespace LMDBAL {
+
+template <class K, class V>
+class Cursor {
+    friend class Storage<K, V>;
+private:
+    Cursor(Storage<K, V>* parent);
+    ~Cursor();
+
+public:
+    void open();
+    void close();
+
+private:
+    void terminated();
+
+private:
+    Storage<K, V>* storage;
+};
+
+};
+
+
+#include "cursor.hpp"
+
+#endif //LMDBAL_CURSOR_H