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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtScript 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSCRIPTSYNTAXCHECKER_H
#define QSCRIPTSYNTAXCHECKER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qstring.h>
#include "qscriptgrammar_p.h"
QT_BEGIN_NAMESPACE
namespace QScript {
class Lexer;
class SyntaxChecker: protected QScriptGrammar
{
public:
enum State {
Error,
Intermediate,
Valid,
};
struct Result {
Result(State s, int ln, int col, const QString &msg)
: state(s), errorLineNumber(ln), errorColumnNumber(col),
errorMessage(msg) {}
State state;
int errorLineNumber;
int errorColumnNumber;
QString errorMessage;
};
SyntaxChecker();
~SyntaxChecker();
Result checkSyntax(const QString &code);
protected:
bool automatic(QScript::Lexer *lexer, int token) const;
inline void reallocateStack();
protected:
int tos;
int stack_size;
int *state_stack;
};
inline void SyntaxChecker::reallocateStack()
{
if (! stack_size)
stack_size = 128;
else
stack_size <<= 1;
state_stack = reinterpret_cast<int*> (qRealloc(state_stack, stack_size * sizeof(int)));
}
} // namespace QScript
QT_END_NAMESPACE
#endif
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