forked from qt-creator/qt-creator
136 lines
4.3 KiB
C++
136 lines
4.3 KiB
C++
/***************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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**
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** Non-Open Source Usage
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**
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** Licensees may use this file in accordance with the Qt Beta Version
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** License Agreement, Agreement version 2.2 provided with the Software or,
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** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
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**
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** GNU General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the packaging
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** of this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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**
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** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception
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** version 1.2, included in the file GPL_EXCEPTION.txt in this package.
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**
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***************************************************************************/
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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#ifndef CPLUSPLUS_ARRAY_H
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#define CPLUSPLUS_ARRAY_H
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#include "CPlusPlusForwardDeclarations.h"
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#include <new>
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#include <cstdlib>
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CPLUSPLUS_BEGIN_HEADER
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CPLUSPLUS_BEGIN_NAMESPACE
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template <typename _Tp, int SEGMENT_SHIFT = 4>
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class Array
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{
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Array(const Array &other);
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void operator =(const Array &other);
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public:
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Array()
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: _segments(0),
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_allocatedSegments(0),
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_segmentCount(-1),
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_allocatedElements(0),
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_count(-1)
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{ }
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~Array()
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{
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if (_segments) {
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for (int index = 0; index <= _segmentCount; ++index) {
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delete[] (_segments[index] + (index << SEGMENT_SHIFT));
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}
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free(_segments);
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}
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}
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inline unsigned size() const
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{ return _count + 1; }
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inline unsigned count() const
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{ return _count + 1; }
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inline const _Tp &at(unsigned index) const
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{ return _segments[index >> SEGMENT_SHIFT][index]; }
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inline const _Tp &operator[](unsigned index) const
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{ return _segments[index >> SEGMENT_SHIFT][index]; }
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inline _Tp &operator[](unsigned index)
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{ return _segments[index >> SEGMENT_SHIFT][index]; }
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void push_back(const _Tp &value)
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{
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if (++_count == _allocatedElements) {
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if (++_segmentCount == _allocatedSegments) {
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_allocatedSegments += 4;
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_segments = (_Tp **) realloc(_segments, _allocatedSegments * sizeof(_Tp *));
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}
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_Tp *segment = new _Tp[SEGMENT_SIZE];
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_segments[_segmentCount] = segment - (_segmentCount << SEGMENT_SHIFT);
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_allocatedElements += SEGMENT_SIZE;
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}
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_segments[_count >> SEGMENT_SHIFT][_count] = value;
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}
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private:
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enum {
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SEGMENT_SIZE = 1 << SEGMENT_SHIFT
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};
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_Tp **_segments;
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int _allocatedSegments;
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int _segmentCount;
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int _allocatedElements;
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int _count;
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};
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CPLUSPLUS_END_NAMESPACE
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CPLUSPLUS_END_HEADER
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#endif // CPLUSPLUS_ARRAY_H
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