240 lines
7.4 KiB
C++
240 lines
7.4 KiB
C++
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
|
|
** Contact: http://www.qt-project.org/legal
|
|
**
|
|
** This file is part of the QtCore module of the Qt Toolkit.
|
|
**
|
|
** $QT_BEGIN_LICENSE:LGPL$
|
|
** Commercial License Usage
|
|
** Licensees holding valid commercial Qt licenses may use this file in
|
|
** accordance with the commercial license agreement provided with the
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
** a written agreement between you and Digia. For licensing terms and
|
|
** conditions see http://qt.digia.com/licensing. For further information
|
|
** use the contact form at http://qt.digia.com/contact-us.
|
|
**
|
|
** 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, Digia gives you certain additional
|
|
** rights. These rights are described in the Digia 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.
|
|
**
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
#ifndef QTCORE_RESULTSTORE_H
|
|
#define QTCORE_RESULTSTORE_H
|
|
|
|
#include <QtCore/qglobal.h>
|
|
|
|
#ifndef QT_NO_QFUTURE
|
|
|
|
#include <QtCore/qmap.h>
|
|
#include <QtCore/qdebug.h>
|
|
|
|
QT_BEGIN_NAMESPACE
|
|
|
|
|
|
/*
|
|
ResultStore stores indexed results. Results can be added and retrieved
|
|
either individually batched in a QVector. Retriveing results and checking
|
|
which indexes are in the store can be done either by iterating or by random
|
|
accees. In addition results kan be removed from the front of the store,
|
|
either individually or in batches.
|
|
*/
|
|
|
|
#ifndef Q_QDOC
|
|
|
|
namespace QtPrivate {
|
|
|
|
class ResultItem
|
|
{
|
|
public:
|
|
ResultItem(const void *_result, int _count) : m_count(_count), result(_result) { } // contruct with vector of results
|
|
ResultItem(const void *_result) : m_count(0), result(_result) { } // construct with result
|
|
ResultItem() : m_count(0), result(0) { }
|
|
bool isValid() const { return result != 0; }
|
|
bool isVector() const { return m_count != 0; }
|
|
int count() const { return (m_count == 0) ? 1 : m_count; }
|
|
int m_count; // result is either a pointer to a result or to a vector of results,
|
|
const void *result; // if count is 0 it's a result, otherwise it's a vector.
|
|
};
|
|
|
|
class Q_CORE_EXPORT ResultIteratorBase
|
|
{
|
|
public:
|
|
ResultIteratorBase();
|
|
ResultIteratorBase(QMap<int, ResultItem>::const_iterator _mapIterator, int _vectorIndex = 0);
|
|
int vectorIndex() const;
|
|
int resultIndex() const;
|
|
|
|
ResultIteratorBase operator++();
|
|
int batchSize() const;
|
|
void batchedAdvance();
|
|
bool operator==(const ResultIteratorBase &other) const;
|
|
bool operator!=(const ResultIteratorBase &other) const;
|
|
bool isVector() const;
|
|
bool canIncrementVectorIndex() const;
|
|
protected:
|
|
QMap<int, ResultItem>::const_iterator mapIterator;
|
|
int m_vectorIndex;
|
|
};
|
|
|
|
template <typename T>
|
|
class ResultIterator : public ResultIteratorBase
|
|
{
|
|
public:
|
|
ResultIterator(const ResultIteratorBase &base)
|
|
: ResultIteratorBase(base) { }
|
|
|
|
const T &value() const
|
|
{
|
|
return *pointer();
|
|
}
|
|
|
|
const T *pointer() const
|
|
{
|
|
if (mapIterator.value().isVector())
|
|
return &(reinterpret_cast<const QVector<T> *>(mapIterator.value().result)->at(m_vectorIndex));
|
|
else
|
|
return reinterpret_cast<const T *>(mapIterator.value().result);
|
|
}
|
|
};
|
|
|
|
class Q_CORE_EXPORT ResultStoreBase
|
|
{
|
|
public:
|
|
ResultStoreBase();
|
|
void setFilterMode(bool enable);
|
|
bool filterMode() const;
|
|
int addResult(int index, const void *result);
|
|
int addResults(int index, const void *results, int vectorSize, int logicalCount);
|
|
ResultIteratorBase begin() const;
|
|
ResultIteratorBase end() const;
|
|
bool hasNextResult() const;
|
|
ResultIteratorBase resultAt(int index) const;
|
|
bool contains(int index) const;
|
|
int count() const;
|
|
virtual ~ResultStoreBase() { }
|
|
|
|
protected:
|
|
int insertResultItem(int index, ResultItem &resultItem);
|
|
void insertResultItemIfValid(int index, ResultItem &resultItem);
|
|
void syncPendingResults();
|
|
void syncResultCount();
|
|
int updateInsertIndex(int index, int _count);
|
|
|
|
QMap<int, ResultItem> m_results;
|
|
int insertIndex; // The index where the next results(s) will be inserted.
|
|
int resultCount; // The number of consecutive results stored, starting at index 0.
|
|
|
|
bool m_filterMode;
|
|
QMap<int, ResultItem> pendingResults;
|
|
int filteredResults;
|
|
|
|
};
|
|
|
|
template <typename T>
|
|
class ResultStore : public ResultStoreBase
|
|
{
|
|
public:
|
|
ResultStore() { }
|
|
|
|
ResultStore(const ResultStoreBase &base)
|
|
: ResultStoreBase(base) { }
|
|
|
|
int addResult(int index, const T *result)
|
|
{
|
|
if (result == 0)
|
|
return ResultStoreBase::addResult(index, result);
|
|
else
|
|
return ResultStoreBase::addResult(index, new T(*result));
|
|
}
|
|
|
|
int addResults(int index, const QVector<T> *results)
|
|
{
|
|
return ResultStoreBase::addResults(index, new QVector<T>(*results), results->count(), results->count());
|
|
}
|
|
|
|
int addResults(int index, const QVector<T> *results, int totalCount)
|
|
{
|
|
if (m_filterMode == true && results->count() != totalCount && 0 == results->count())
|
|
return ResultStoreBase::addResults(index, 0, 0, totalCount);
|
|
else
|
|
return ResultStoreBase::addResults(index, new QVector<T>(*results), results->count(), totalCount);
|
|
}
|
|
|
|
int addCanceledResult(int index)
|
|
{
|
|
return addResult(index, 0);
|
|
}
|
|
|
|
int addCanceledResults(int index, int _count)
|
|
{
|
|
QVector<T> empty;
|
|
return addResults(index, &empty, _count);
|
|
}
|
|
|
|
ResultIterator<T> begin() const
|
|
{
|
|
return static_cast<ResultIterator<T> >(ResultStoreBase::begin());
|
|
}
|
|
|
|
ResultIterator<T> end() const
|
|
{
|
|
return static_cast<ResultIterator<T> >(ResultStoreBase::end());
|
|
}
|
|
|
|
ResultIterator<T> resultAt(int index) const
|
|
{
|
|
return static_cast<ResultIterator<T> >(ResultStoreBase::resultAt(index));
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
QMap<int, ResultItem>::const_iterator mapIterator = m_results.constBegin();
|
|
while (mapIterator != m_results.constEnd()) {
|
|
if (mapIterator.value().isVector())
|
|
delete reinterpret_cast<const QVector<T> *>(mapIterator.value().result);
|
|
else
|
|
delete reinterpret_cast<const T *>(mapIterator.value().result);
|
|
++mapIterator;
|
|
}
|
|
resultCount = 0;
|
|
m_results.clear();
|
|
}
|
|
|
|
~ResultStore()
|
|
{
|
|
clear();
|
|
}
|
|
|
|
};
|
|
|
|
} // namespace QtPrivate
|
|
|
|
#endif //Q_QDOC
|
|
|
|
QT_END_NAMESPACE
|
|
|
|
#endif // QT_NO_QFUTURE
|
|
|
|
#endif
|