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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtXmlPatterns module of the Qt Toolkit.

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    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 //

    43 //  W A R N I N G

    44 //  -------------

    45 //

    46 // This file is not part of the Qt API.  It exists purely as an

    47 // implementation detail.  This header file may change from version to

    48 // version without notice, or even be removed.

    49 //

    50 // We mean it.

    51 

    52 #ifndef QPatternist_AutoPtr_p_h

    53 #define QPatternist_AutoPtr_p_h

    54 

    55 #include <QtGlobal>

    56 

    57 QT_BEGIN_NAMESPACE

    58 

    59 namespace QPatternist

    60 {

    61     template<typename T>

    62     class AutoPtrRef

    63     {

    64     public:

    65         explicit AutoPtrRef(T *const other) : m_ptr(other)

    66         {

    67         }

    68 

    69         T* m_ptr;

    70     };

    71 

    72     template<typename T>

    73     class AutoPtr

    74     {

    75     public:

    76         explicit inline AutoPtr(T *pointer = 0) : m_ptr(pointer)

    77         {

    78         }

    79 

    80         inline AutoPtr(AutoPtr<T> &other) : m_ptr(other.release())

    81         {

    82         }

    83 

    84         inline ~AutoPtr()

    85         {

    86             delete m_ptr;

    87         }

    88 

    89         inline T &operator*() const

    90         {

    91             Q_ASSERT_X(m_ptr, Q_FUNC_INFO, "");

    92             return *m_ptr;

    93         }

    94 

    95         T *operator->() const

    96         {

    97             Q_ASSERT_X(m_ptr, Q_FUNC_INFO, "");

    98             return m_ptr;

    99         }

   100 

   101         inline bool operator!() const

   102         {

   103             return !m_ptr;

   104         }

   105 

   106         inline operator bool() const

   107         {

   108             return m_ptr != 0;

   109         }

   110 

   111         AutoPtr(AutoPtrRef<T> ref) : m_ptr(ref.m_ptr)

   112         {

   113         }

   114 

   115         AutoPtr& operator=(AutoPtrRef<T> ref)

   116         {

   117             if(ref.m_ptr != m_ptr)

   118             {

   119                 delete m_ptr;

   120                 m_ptr = ref.m_ptr;

   121             }

   122             return *this;

   123         }

   124 

   125 #ifndef QT_NO_MEMBER_TEMPLATES

   126         template<typename L>

   127         operator AutoPtrRef<L>()

   128         {

   129             return AutoPtrRef<L>(this->release());

   130         }

   131 

   132         template<typename L>

   133         operator AutoPtr<L>()

   134         {

   135             return AutoPtr<L>(this->release());

   136         }

   137 

   138         template<typename L>

   139         inline AutoPtr(AutoPtr<L>& other) : m_ptr(other.release())

   140         {

   141         }

   142 #endif

   143 

   144         inline T *release()

   145         {

   146             T *const retval = m_ptr;

   147             m_ptr = 0;

   148             return retval;

   149         }

   150 

   151         inline T *data() const

   152         {

   153             return m_ptr;

   154         }

   155 

   156         void reset(T * other = 0)

   157         {

   158             if(other != m_ptr)

   159             {

   160                 delete m_ptr;

   161                 m_ptr = other;

   162             }

   163         }

   164 

   165         inline AutoPtr &operator=(AutoPtr &other)

   166         {

   167             reset(other.release());

   168             return *this;

   169         }

   170 

   171     private:

   172         T *m_ptr;

   173     };

   174 }

   175 

   176 QT_END_NAMESPACE

   177 #endif