/*

 *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)

 *  Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.

 *  Copyright (C) 2009 Torch Mobile, Inc.

 *

 *  This library is free software; you can redistribute it and/or

 *  modify it under the terms of the GNU Lesser General Public

 *  License as published by the Free Software Foundation; either

 *  version 2 of the License, or (at your option) any later version.

 *

 *  This library is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 *  Lesser General Public License for more details.

 *

 *  You should have received a copy of the GNU Lesser General Public

 *  License along with this library; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */

#ifndef RegExp_h

#define RegExp_h

#include "UString.h"

#include "ExecutableAllocator.h"

#include <wtf/Forward.h>

#include <wtf/RefCounted.h>

#include "yarr/RegexJIT.h"

#include "yarr/RegexInterpreter.h"

struct JSRegExp;

namespace JSC {

    class JSGlobalData;

    class RegExp : public RefCounted<RegExp> {

    public:

        static PassRefPtr<RegExp> create(JSGlobalData* globalData, const UString& pattern, const UString& flags);

#if !ENABLE(YARR)

        ~RegExp();

#endif

        bool global() const { return m_flagBits & Global; }

        bool ignoreCase() const { return m_flagBits & IgnoreCase; }

        bool multiline() const { return m_flagBits & Multiline; }

        const UString& pattern() const { return m_pattern; }

        bool isValid() const { return !m_constructionError; }

        const char* errorMessage() const { return m_constructionError; }

        int match(const UString&, int startOffset, Vector<int, 32>* ovector = 0);

        unsigned numSubpatterns() const { return m_numSubpatterns; }

    private:

        RegExp(JSGlobalData* globalData, const UString& pattern, const UString& flags);

        void compile(JSGlobalData*);

        enum FlagBits { Global = 1, IgnoreCase = 2, Multiline = 4 };

        UString m_pattern; // FIXME: Just decompile m_regExp instead of storing this.

        int m_flagBits;

        const char* m_constructionError;

        unsigned m_numSubpatterns;

        UString m_lastMatchString;

        int m_lastMatchStart;

        Vector<int, 32> m_lastOVector;

#if ENABLE(YARR_JIT)

        Yarr::RegexCodeBlock m_regExpJITCode;

#elif ENABLE(YARR)

        OwnPtr<Yarr::BytecodePattern> m_regExpBytecode;

#else

        JSRegExp* m_regExp;

#endif

    };

} // namespace JSC

#endif // RegExp_h