src/xmlpatterns/utils/qautoptr_p.h
changeset 0 1918ee327afb
child 4 3b1da2848fc7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/xmlpatterns/utils/qautoptr_p.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,177 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtXmlPatterns 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef QPatternist_AutoPtr_p_h
+#define QPatternist_AutoPtr_p_h
+
+#include <QtGlobal>
+
+QT_BEGIN_NAMESPACE
+
+namespace QPatternist
+{
+    template<typename T>
+    class AutoPtrRef
+    {
+    public:
+        explicit AutoPtrRef(T *const other) : m_ptr(other)
+        {
+        }
+
+        T* m_ptr;
+    };
+
+    template<typename T>
+    class AutoPtr
+    {
+    public:
+        explicit inline AutoPtr(T *pointer = 0) : m_ptr(pointer)
+        {
+        }
+
+        inline AutoPtr(AutoPtr<T> &other) : m_ptr(other.release())
+        {
+        }
+
+        inline ~AutoPtr()
+        {
+            delete m_ptr;
+        }
+
+        inline T &operator*() const
+        {
+            Q_ASSERT_X(m_ptr, Q_FUNC_INFO, "");
+            return *m_ptr;
+        }
+
+        T *operator->() const
+        {
+            Q_ASSERT_X(m_ptr, Q_FUNC_INFO, "");
+            return m_ptr;
+        }
+
+        inline bool operator!() const
+        {
+            return !m_ptr;
+        }
+
+        inline operator bool() const
+        {
+            return m_ptr != 0;
+        }
+
+        AutoPtr(AutoPtrRef<T> ref) : m_ptr(ref.m_ptr)
+        {
+        }
+
+        AutoPtr& operator=(AutoPtrRef<T> ref)
+        {
+            if(ref.m_ptr != m_ptr)
+            {
+                delete m_ptr;
+                m_ptr = ref.m_ptr;
+            }
+            return *this;
+        }
+
+#ifndef QT_NO_MEMBER_TEMPLATES
+        template<typename L>
+        operator AutoPtrRef<L>()
+        {
+            return AutoPtrRef<L>(this->release());
+        }
+
+        template<typename L>
+        operator AutoPtr<L>()
+        {
+            return AutoPtr<L>(this->release());
+        }
+
+        template<typename L>
+        inline AutoPtr(AutoPtr<L>& other) : m_ptr(other.release())
+        {
+        }
+#endif
+
+        inline T *release()
+        {
+            T *const retval = m_ptr;
+            m_ptr = 0;
+            return retval;
+        }
+
+        inline T *data() const
+        {
+            return m_ptr;
+        }
+
+        void reset(T * other = 0)
+        {
+            if(other != m_ptr)
+            {
+                delete m_ptr;
+                m_ptr = other;
+            }
+        }
+
+        inline AutoPtr &operator=(AutoPtr &other)
+        {
+            reset(other.release());
+            return *this;
+        }
+
+    private:
+        T *m_ptr;
+    };
+}
+
+QT_END_NAMESPACE
+#endif