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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QDATABUFFER_P_H
#define QDATABUFFER_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "QtCore/qbytearray.h"
QT_BEGIN_NAMESPACE
template <typename Type> class QDataBuffer
{
public:
QDataBuffer(int res)
{
capacity = res;
if (res)
buffer = (Type*) qMalloc(capacity * sizeof(Type));
else
buffer = 0;
siz = 0;
}
~QDataBuffer()
{
if (buffer)
qFree(buffer);
}
inline void reset() { siz = 0; }
inline bool isEmpty() const { return siz==0; }
inline int size() const { return siz; }
inline Type *data() const { return buffer; }
inline Type &at(int i) { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; }
inline const Type &at(int i) const { Q_ASSERT(i >= 0 && i < siz); return buffer[i]; }
inline Type &last() { Q_ASSERT(!isEmpty()); return buffer[siz-1]; }
inline const Type &last() const { Q_ASSERT(!isEmpty()); return buffer[siz-1]; }
inline Type &first() { Q_ASSERT(!isEmpty()); return buffer[0]; }
inline const Type &first() const { Q_ASSERT(!isEmpty()); return buffer[0]; }
inline void add(const Type &t) {
reserve(siz + 1);
buffer[siz] = t;
++siz;
}
inline void pop_back() {
Q_ASSERT(siz > 0);
--siz;
}
inline void resize(int size) {
reserve(size);
siz = size;
}
inline void reserve(int size) {
if (size > capacity) {
if (capacity == 0)
capacity = 1;
while (capacity < size)
capacity *= 2;
buffer = (Type*) qRealloc(buffer, capacity * sizeof(Type));
}
}
inline void shrink(int size) {
capacity = size;
if (size)
buffer = (Type*) qRealloc(buffer, capacity * sizeof(Type));
else {
qFree(buffer);
buffer = 0;
}
}
inline void swap(QDataBuffer<Type> &other) {
qSwap(capacity, other.capacity);
qSwap(siz, other.siz);
qSwap(buffer, other.buffer);
}
inline QDataBuffer &operator<<(const Type &t) { add(t); return *this; }
private:
int capacity;
int siz;
Type *buffer;
};
QT_END_NAMESPACE
#endif // QDATABUFFER_P_H
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