48e0c4df23
Change-Id: Ic804938fc352291d011800d21e549c10acac66fb Reviewed-by: Lars Knoll <lars.knoll@digia.com>
128 lines
4.0 KiB
C++
128 lines
4.0 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 utils 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 NFA_H
|
|
#define NFA_H
|
|
|
|
#include <QMap>
|
|
#include <QHash>
|
|
#include <QString>
|
|
#include <QVector>
|
|
#include <QDebug>
|
|
#include <QStack>
|
|
#include <QByteArray>
|
|
|
|
#include "global.h"
|
|
|
|
typedef QHash<InputType, int> TransitionMap;
|
|
|
|
struct State
|
|
{
|
|
QString symbol;
|
|
TransitionMap transitions;
|
|
};
|
|
|
|
inline QDataStream &operator<<(QDataStream &stream, const State &state)
|
|
{
|
|
return stream << state.symbol << state.transitions;
|
|
}
|
|
|
|
inline QDataStream &operator>>(QDataStream &stream, State &state)
|
|
{
|
|
return stream >> state.symbol >> state.transitions;
|
|
}
|
|
|
|
struct DFA : public QVector<State>
|
|
{
|
|
void debug() const;
|
|
DFA minimize() const;
|
|
};
|
|
|
|
class NFA
|
|
{
|
|
public:
|
|
static NFA createSingleInputNFA(InputType input);
|
|
static NFA createSymbolNFA(const QString &symbol);
|
|
static NFA createAlternatingNFA(const NFA &a, const NFA &b);
|
|
static NFA createConcatenatingNFA(const NFA &a, const NFA &b);
|
|
static NFA createOptionalNFA(const NFA &a);
|
|
|
|
// convenience
|
|
static NFA createStringNFA(const QByteArray &str);
|
|
static NFA createSetNFA(const QSet<InputType> &set);
|
|
static NFA createZeroOrOneNFA(const NFA &a);
|
|
static NFA applyQuantity(const NFA &a, int minOccurrences, int maxOccurrences);
|
|
|
|
void setTerminationSymbol(const QString &symbol);
|
|
|
|
DFA toDFA() const;
|
|
|
|
inline bool isEmpty() const { return states.isEmpty(); }
|
|
inline int stateCount() const { return states.count(); }
|
|
|
|
void debug();
|
|
|
|
private:
|
|
void initialize(int size);
|
|
void addTransition(int from, InputType input, int to);
|
|
void copyFrom(const NFA &other, int baseState);
|
|
|
|
void initializeFromPair(const NFA &a, const NFA &b,
|
|
int *initialA, int *finalA,
|
|
int *initialB, int *finalB);
|
|
|
|
QSet<int> epsilonClosure(const QSet<int> &initialClosure) const;
|
|
|
|
inline void assertValidState(int state)
|
|
{ Q_UNUSED(state); Q_ASSERT(state >= 0); Q_ASSERT(state < states.count()); }
|
|
|
|
#if defined(AUTOTEST)
|
|
public:
|
|
#endif
|
|
int initialState;
|
|
int finalState;
|
|
|
|
QVector<State> states;
|
|
};
|
|
|
|
#endif // NFA_H
|
|
|