Add Grid class as wrapper for two-dimensional array

include/aoc/Grid.hpp

@@ -0,0 +1,60 @@
+// Solutions to the Advent Of Code 2024.
+// Copyright (C) 2024  Stefan Müller
+//
+// 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/>.
+
+#pragma once
+
+#include <memory>
+
+#include <aoc/Point2.hpp>
+
+// Inspired by https://stackoverflow.com/a/32279494
+template <typename T>
+class Grid
+{
+public:
+    Grid(size_t nRows, size_t nColumns)
+        : nRows_{ nRows }, nColumns_{ nColumns }, data_{ std::make_unique<T[]>(nRows * nColumns) }
+    {
+    }
+
+    size_t getNRows() const
+    {
+        return nRows_;
+    }
+
+    size_t getNColumns() const
+    {
+        return nColumns_;
+    }
+
+    T& cell(size_t rowNo, size_t columnNo)
+    {
+        return data_[rowNo * nColumns_ + columnNo];
+    }
+
+    T& cell(Point2 position)
+    {
+        return data_[position.y * nColumns_ + position.x];
+    }
+
+    T* operator[](size_t rowNo)
+    {
+        return rowNo * nColumns_ + data_.get();
+    }
+private:
+    size_t nRows_;
+    size_t nColumns_;
+    std::unique_ptr<T[]> data_;
+};