Long live Qt 4.5!

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diff --git a/src/gui/painting/qdatabuffer_p.h b/src/gui/painting/qdatabuffer_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDATABUFFER_P_H
+#define QDATABUFFER_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qbytearray.h"
+
+QT_BEGIN_NAMESPACE
+
+template <typename Type> class QDataBuffer
+{
+public:
+    QDataBuffer(int res = 64)
+    {
+        capacity = res;
+        buffer = (Type*) qMalloc(capacity * sizeof(Type));
+        siz = 0;
+    }
+
+    ~QDataBuffer()
+    {
+        qFree(buffer);
+    }
+
+    inline void reset() { siz = 0; }
+
+    inline bool isEmpty() const { return siz==0; }
+
+    inline int size() const { return siz; }
+    inline Type *data() const { return buffer; }
+
+    inline Type &at(int i) { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; }
+    inline const Type &at(int i) const { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; }
+    inline const Type &last() const { Q_ASSERT(!isEmpty()); return buffer[siz-1]; }
+    inline const Type &first() const { Q_ASSERT(!isEmpty()); return buffer[0]; }
+
+    inline void add(const Type &t) {
+        reserve(siz + 1);
+        buffer[siz] = t;
+        ++siz;
+    }
+
+    inline void resize(int size) {
+        reserve(size);
+        siz = size;
+    }
+
+    inline void reserve(int size) {
+        if (size > capacity) {
+            while (capacity < size)
+                capacity *= 2;
+            buffer = (Type*) qRealloc(buffer, capacity * sizeof(Type));
+        }
+    }
+
+    inline void shrink(int size) {
+        capacity = size;
+        buffer = (Type*) qRealloc(buffer, capacity * sizeof(Type));
+    }
+
+    inline void swap(QDataBuffer<Type> &other) {
+        qSwap(capacity, other.capacity);
+        qSwap(siz, other.siz);
+        qSwap(buffer, other.buffer);
+    }
+
+    inline QDataBuffer &operator<<(const Type &t) { add(t); return *this; }
+
+private:
+    int capacity;
+    int siz;
+    Type *buffer;
+};
+
+QT_END_NAMESPACE
+
+#endif // QDATABUFFER_P_H