1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtXmlPatterns module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
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16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
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38****************************************************************************/
39
40//
41// W A R N I N G
42// -------------
43//
44// This file is not part of the Qt API. It exists purely as an
45// implementation detail. This header file may change from version to
46// version without notice, or even be removed.
47//
48// We mean it.
49
50#ifndef QPatternist_AutoPtr_p_h
51#define QPatternist_AutoPtr_p_h
52
53#include <QtGlobal>
54
55QT_BEGIN_NAMESPACE
56
57namespace QPatternist
58{
59 template<typename T>
60 class AutoPtrRef
61 {
62 public:
63 explicit AutoPtrRef(T *const other) : m_ptr(other)
64 {
65 }
66
67 T* m_ptr;
68 };
69
70 template<typename T>
71 class AutoPtr
72 {
73 public:
74 explicit inline AutoPtr(T *pointer = 0) : m_ptr(pointer)
75 {
76 }
77
78 inline AutoPtr(AutoPtr<T> &other) : m_ptr(other.release())
79 {
80 }
81
82 inline ~AutoPtr()
83 {
84 delete m_ptr;
85 }
86
87 inline T &operator*() const
88 {
89 Q_ASSERT_X(m_ptr, Q_FUNC_INFO, "");
90 return *m_ptr;
91 }
92
93 T *operator->() const
94 {
95 Q_ASSERT_X(m_ptr, Q_FUNC_INFO, "");
96 return m_ptr;
97 }
98
99 inline bool operator!() const
100 {
101 return !m_ptr;
102 }
103
104 inline operator bool() const
105 {
106 return m_ptr != 0;
107 }
108
109 AutoPtr(AutoPtrRef<T> ref) : m_ptr(ref.m_ptr)
110 {
111 }
112
113 AutoPtr& operator=(AutoPtrRef<T> ref)
114 {
115 if(ref.m_ptr != m_ptr)
116 {
117 delete m_ptr;
118 m_ptr = ref.m_ptr;
119 }
120 return *this;
121 }
122
123 template<typename L>
124 operator AutoPtrRef<L>()
125 {
126 return AutoPtrRef<L>(this->release());
127 }
128
129 template<typename L>
130 operator AutoPtr<L>()
131 {
132 return AutoPtr<L>(this->release());
133 }
134
135 template<typename L>
136 inline AutoPtr(AutoPtr<L>& other) : m_ptr(other.release())
137 {
138 }
139
140 inline T *release()
141 {
142 T *const retval = m_ptr;
143 m_ptr = 0;
144 return retval;
145 }
146
147 inline T *data() const
148 {
149 return m_ptr;
150 }
151
152 void reset(T * other = 0)
153 {
154 if(other != m_ptr)
155 {
156 delete m_ptr;
157 m_ptr = other;
158 }
159 }
160
161 inline AutoPtr &operator=(AutoPtr &other)
162 {
163 reset(other: other.release());
164 return *this;
165 }
166
167 private:
168 T *m_ptr;
169 };
170}
171
172QT_END_NAMESPACE
173#endif
174

source code of qtxmlpatterns/src/xmlpatterns/utils/qautoptr_p.h