// -*- c-basic-offset: 2 -*-

/*

 *  This file is part of the KDE libraries

 *  Copyright (C) 1999-2001 Harri Porten (porten@kde.org)

 *  Copyright (C) 2001 Peter Kelly (pmk@post.com)

 *  Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc.

 *

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

 *  modify it under the terms of the GNU Library 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

 *  Library General Public License for more details.

 *

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

 *  along with this library; see the file COPYING.LIB.  If not, write to

 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

 *  Boston, MA 02110-1301, USA.

 *

 */

#ifndef INTERNAL_H

#define INTERNAL_H

#include "JSType.h"

#include "interpreter.h"

#include "object.h"

#include "protect.h"

#include "scope_chain.h"

#include "types.h"

#include "ustring.h"

#include <wtf/Noncopyable.h>

#define I18N_NOOP(s) s

namespace KJS {

  class FunctionPrototype;

  // ---------------------------------------------------------------------------

  //                            Primitive impls

  // ---------------------------------------------------------------------------

  class StringImp : public JSCell {

  public:

    StringImp(const UString& v) : val(v) { Collector::reportExtraMemoryCost(v.cost()); }

    enum HasOtherOwnerType { HasOtherOwner };

    StringImp(const UString& value, HasOtherOwnerType) : val(value) { }

    UString value() const { return val; }

    JSType type() const { return StringType; }

    JSValue *toPrimitive(ExecState *exec, JSType preferred = UnspecifiedType) const;

    bool toBoolean(ExecState *exec) const;

    double toNumber(ExecState *exec) const;

    UString toString(ExecState *exec) const;

    JSObject *toObject(ExecState *exec) const;

  private:

    UString val;

  };

  class NumberImp : public JSCell {

    friend class ConstantValues;

IMPORT    friend JSValue *jsNumberCell(double);

  public:

    double value() const { return val; }

    JSType type() const { return NumberType; }

    JSValue *toPrimitive(ExecState *exec, JSType preferred = UnspecifiedType) const;

    bool toBoolean(ExecState *exec) const;

    double toNumber(ExecState *exec) const;

    UString toString(ExecState *exec) const;

    JSObject *toObject(ExecState *exec) const;

  private:

    NumberImp(double v) : val(v) { }

    virtual bool getUInt32(uint32_t&) const;

    double val;

  };

  /**

   * @short The "label set" in Ecma-262 spec

   */

  class LabelStack : Noncopyable {

  public:

    LabelStack()

      : tos(0)

    {

    }

    ~LabelStack();

    /**

     * If id is not empty and is not in the stack already, puts it on top of

     * the stack and returns true, otherwise returns false

     */

    bool push(const Identifier &id);

    /**

     * Is the id in the stack?

     */

    bool contains(const Identifier &id) const;

    /**

     * Removes from the stack the last pushed id (what else?)

     */

    void pop();

  private:

    struct StackElem {

      Identifier id;

      StackElem *prev;

    };

    StackElem *tos;

  };

  // ---------------------------------------------------------------------------

  //                            Evaluation

  // ---------------------------------------------------------------------------

  struct AttachedInterpreter;

  class DebuggerImp {

  public:

    DebuggerImp() {

      interps = 0;

      isAborted = false;

    }

    bool aborted() const { return isAborted; }

    AttachedInterpreter *interps;

    bool isAborted;

  };

  // helper function for toInteger, toInt32, toUInt32 and toUInt16

  IMPORT

  double roundValue(ExecState *, JSValue *);

#ifndef NDEBUG

  void printInfo(ExecState *exec, const char *s, JSValue *, int lineno = -1);

#endif

inline LabelStack::~LabelStack()

{

    StackElem *prev;

    for (StackElem *e = tos; e; e = prev) {

        prev = e->prev;

        delete e;

    }

}

inline void LabelStack::pop()

{

    if (StackElem *e = tos) {

        tos = e->prev;

        delete e;

    }

}

} // namespace

#endif //  INTERNAL_H