/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the plugins of the Qt Toolkit.
**
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** GNU Lesser General Public License Usage
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** 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
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****************************************************************************/

#ifndef ARRAY_H
#define ARRAY_H

#include <QtCore/QtAlgorithms>

QT_BEGIN_NAMESPACE

/* A simple, non-shared array. */

template <class T>
class Array
{
    Q_DISABLE_COPY(Array)
public:
    enum { initialSize = 5 };

    typedef T* const_iterator;

    explicit Array(size_t size= 0) : data(0), m_capacity(0), m_size(0)
        { if (size) resize(size); }
    ~Array() { delete [] data; }

    T *data;
    inline size_t size() const          { return m_size; }
    inline const_iterator begin() const { return data; }
    inline const_iterator end() const   { return data + m_size; }

    inline void append(const T &value)
    {
        const size_t oldSize = m_size;
        resize(m_size + 1);
        data[oldSize] = value;
    }

    inline void resize(size_t size)
    {
        if (size > m_size)
            reserve(size > 1 ? size + size / 2 : size_t(initialSize));
        m_size = size;
    }

    void reserve(size_t capacity)
    {
        if (capacity > m_capacity) {
            const T *oldData = data;
            data = new T[capacity];
            if (oldData) {
                qCopy(oldData, oldData + m_size, data);
                delete [] oldData;
            }
            m_capacity = capacity;
        }
    }

private:
    size_t m_capacity;
    size_t m_size;
};

QT_END_NAMESPACE

#endif // ARRAY_H
