diff options
Diffstat (limited to 'src/qml/qml/ftw/qfinitestack_p.h')
| -rw-r--r-- | src/qml/qml/ftw/qfinitestack_p.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/qml/qml/ftw/qfinitestack_p.h b/src/qml/qml/ftw/qfinitestack_p.h new file mode 100644 index 0000000000..c5a9fbaedb --- /dev/null +++ b/src/qml/qml/ftw/qfinitestack_p.h @@ -0,0 +1,186 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the QtQml module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QFINITESTACK_P_H +#define QFINITESTACK_P_H + +// +// 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. +// + +#include <QtCore/qglobal.h> + +QT_BEGIN_NAMESPACE + +template<typename T> +struct QFiniteStack { + inline QFiniteStack(); + inline ~QFiniteStack(); + + inline void deallocate(); + inline void allocate(int size); + + inline bool isEmpty() const; + inline const T &top() const; + inline T &top(); + inline void push(const T &o); + inline T pop(); + inline int count() const; + inline const T &at(int index) const; + inline T &operator[](int index); +private: + T *_array; + int _alloc; + int _size; +}; + +template<typename T> +QFiniteStack<T>::QFiniteStack() +: _array(0), _alloc(0), _size(0) +{ +} + +template<typename T> +QFiniteStack<T>::~QFiniteStack() +{ + deallocate(); +} + +template<typename T> +bool QFiniteStack<T>::isEmpty() const +{ + return _size == 0; +} + +template<typename T> +const T &QFiniteStack<T>::top() const +{ + return _array[_size - 1]; +} + +template<typename T> +T &QFiniteStack<T>::top() +{ + return _array[_size - 1]; +} + +template<typename T> +void QFiniteStack<T>::push(const T &o) +{ + if (QTypeInfo<T>::isComplex) { + new (_array + _size++) T(o); + } else { + _array[_size++] = o; + } +} + +template<typename T> +T QFiniteStack<T>::pop() +{ + --_size; + + if (QTypeInfo<T>::isComplex) { + T rv = _array[_size]; + (_array + _size)->~T(); + return rv; + } else { + return _array[_size]; + } +} + +template<typename T> +int QFiniteStack<T>::count() const +{ + return _size; +} + +template<typename T> +const T &QFiniteStack<T>::at(int index) const +{ + return _array[index]; +} + +template<typename T> +T &QFiniteStack<T>::operator[](int index) +{ + return _array[index]; +} + +template<typename T> +void QFiniteStack<T>::allocate(int size) +{ + Q_ASSERT(_array == 0); + Q_ASSERT(_alloc == 0); + Q_ASSERT(_size == 0); + + if (!size) return; + + _array = (T *)qMalloc(size * sizeof(T)); + _alloc = size; +} + +template<typename T> +void QFiniteStack<T>::deallocate() +{ + if (QTypeInfo<T>::isComplex) { + T *i = _array + _size; + while (i != _array) + (--i)->~T(); + } + + qFree(_array); + + _array = 0; + _alloc = 0; + _size = 0; +} + +QT_END_NAMESPACE + +#endif // QFINITESTACK_P_H + |