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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 QtScript 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 QSCRIPTBUFFER_P_H
#define QSCRIPTBUFFER_P_H
#include <QtCore/qglobal.h>
QT_BEGIN_NAMESPACE
//
// 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.
//
namespace QScript
{
template <typename T> class Buffer
{
public:
typedef T *iterator;
typedef const T *const_iterator;
Buffer() : m_data(0), m_capacity(0), m_size(0) { }
~Buffer() { delete [] m_data; }
inline void reserve(int num);
inline void reset();
inline void clear();
inline void append(const T &t);
inline iterator begin();
inline iterator end();
inline const_iterator begin() const;
inline const_iterator end() const;
inline int size() const;
inline void resize(int s);
inline int capacity() const;
inline T *data();
inline const T *constData() const;
inline T &last();
inline T &takeLast();
inline T &at(int i) { return (*this)[i]; }
inline const T &at(int i) const { return (*this)[i]; }
inline T &operator[](int i);
inline const T &operator[](int i) const;
inline bool isEmpty() const;
private:
T *m_data;
int m_capacity;
int m_size;
private:
Q_DISABLE_COPY(Buffer)
};
} // namespace QScript
template <typename T> T *QScript::Buffer<T>::data() { return m_data; }
template <typename T> const T *QScript::Buffer<T>::constData() const { return m_data; }
template <typename T> void QScript::Buffer<T>::reset() { m_size = 0; }
template <typename T> int QScript::Buffer<T>::capacity() const { return m_capacity; }
template <typename T> int QScript::Buffer<T>::size() const { return m_size; }
template <typename T> void QScript::Buffer<T>::resize(int s)
{
if (m_capacity < s)
reserve (s << 1);
m_size = s;
}
template <typename T> void QScript::Buffer<T>::clear()
{
delete [] m_data;
m_data = 0;
m_size = 0;
m_capacity = 0;
}
template <typename T> void QScript::Buffer<T>::reserve(int x)
{
// its an ever expanding buffer so it never gets smaller..
if (x < m_capacity)
return;
m_capacity = x;
T *new_data = new T[m_capacity];
for (int i=0; i<m_size; ++i)
new_data[i] = m_data[i];
delete [] m_data;
m_data = new_data;
}
template <typename T> void QScript::Buffer<T>::append(const T &t)
{
if (m_size == m_capacity)
reserve(m_capacity + 32);
m_data[m_size++] = t;
}
template <typename T> T &QScript::Buffer<T>::operator[](int i)
{
Q_ASSERT(i >= 0);
Q_ASSERT(i < m_size);
return m_data[i];
}
template <typename T> const T &QScript::Buffer<T>::operator[](int i) const
{
Q_ASSERT(i >= 0);
Q_ASSERT(i < m_size);
return m_data[i];
}
template <typename T> bool QScript::Buffer<T>::isEmpty() const
{
return m_size == 0;
}
template <typename T> T &QScript::Buffer<T>::takeLast()
{
Q_ASSERT(!isEmpty());
--m_size;
return m_data[m_size];
}
template <typename T> T &QScript::Buffer<T>::last()
{
return m_data[m_size - 1];
}
template <typename T> typename QScript::Buffer<T>::iterator QScript::Buffer<T>::begin()
{
return m_data;
}
template <typename T> typename QScript::Buffer<T>::iterator QScript::Buffer<T>::end()
{
return m_data + m_size;
}
template <typename T> typename QScript::Buffer<T>::const_iterator QScript::Buffer<T>::begin() const
{
return m_data;
}
template <typename T> typename QScript::Buffer<T>::const_iterator QScript::Buffer<T>::end() const
{
return m_data + m_size;
}
QT_END_NAMESPACE
#endif
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