libcore: Added DataArray template class

doomsday/libs/core/include/de/DataArray

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+#include "data/dataarray.h"

doomsday/libs/core/include/de/data/dataarray.h

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+/** @file dataarray.h  Block interpreted as an array of C structs.
+ *
+ * @authors Copyright (c) 2018 Jaakko Keränen <jaakko.keranen@iki.fi>
+ *
+ * @par License
+ * LGPL: http://www.gnu.org/licenses/lgpl.html
+ *
+ * <small>This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser 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 Lesser
+ * General Public License for more details. You should have received a copy of
+ * the GNU Lesser General Public License along with this program; if not, see:
+ * http://www.gnu.org/licenses</small>
+ */
+
+#ifndef LIBCORE_DATAARRAY_H
+#define LIBCORE_DATAARRAY_H
+
+#include "../Block"
+
+namespace de {
+
+template <typename T>
+class DataArray
+{
+public:
+    DataArray(Block data)
+        : _data(std::move(data))
+        , _entries(reinterpret_cast<const T *>(_data.constData()))
+        , _size(int(_data.size() / sizeof(T)))
+    {}
+
+    int size() const
+    {
+        return _size;
+    }
+
+    const T &at(int pos) const
+    {
+        DENG2_ASSERT(pos >= 0);
+        DENG2_ASSERT(pos < _size);
+        return _entries[pos];
+    }
+
+    const T &operator[](int pos) const
+    {
+        return at(pos);
+    }
+
+private:
+    Block    _data;
+    const T *_entries;
+    int      _size;
+};
+
+} // namespace de
+
+#endif // LIBCORE_DATAARRAY_H