JavaScriptCore/kjs/array_instance.h

// -*- c-basic-offset: 2 -*-
/*
 *  This file is part of the KDE libraries
 *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
 *  Copyright (C) 2003, 2007 Apple Inc. All rights reserved.
 *
 *  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 ARRAY_INSTANCE_H
#define ARRAY_INSTANCE_H

#include "object.h"

namespace KJS {

  class ArrayInstance : public JSObject {
  public:
    ArrayInstance(JSObject *proto, unsigned initialLength);
    ArrayInstance(JSObject *proto, const List &initialValues);
    ~ArrayInstance();

    virtual bool getOwnPropertySlot(ExecState *, const Identifier&, PropertySlot&);
    virtual bool getOwnPropertySlot(ExecState *, unsigned, PropertySlot&);
    virtual void put(ExecState *exec, const Identifier &propertyName, JSValue *value, int attr = None);
    virtual void put(ExecState *exec, unsigned propertyName, JSValue *value, int attr = None);
    virtual bool deleteProperty(ExecState *exec, const Identifier &propertyName);
    virtual bool deleteProperty(ExecState *exec, unsigned propertyName);
    virtual void getPropertyNames(ExecState*, PropertyNameArray&);

    virtual void mark();

    virtual const ClassInfo *classInfo() const { return &info; }
    static const ClassInfo info;
    
    unsigned getLength() const { return length; }
    JSValue* getItem(unsigned) const;
    
    void sort(ExecState *exec);
    void sort(ExecState *exec, JSObject *compareFunction);
    
  private:
    static JSValue *lengthGetter(ExecState *, JSObject *, const Identifier&, const PropertySlot&);

    void setLength(unsigned newLength, ExecState *exec);
    
    unsigned compactForSorting();
    
    void resizeStorage(unsigned);

    // store capacity in extra space at the beginning of the storage array to save space
    size_t capacity() { return storage ? reinterpret_cast<size_t>(storage[-1]) : 0; }

    unsigned length;
    unsigned storageLength;
    JSValue **storage;
  };

} // namespace KJS

#endif