/* vim: set ts=4 sw=4 tw=99 et

 *

 * Copyright (C) 2012 David Anderson

 *

 * This file is part of JITCraft.

 *

 * JITCraft is free software: you can redistribute it and/or modify it under

 * the terms of the GNU General Public License as published by the Free

 * Software Foundation, either version 3 of the License, or (at your option)

 * any later version.

 * 

 * Foobar 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 General Public License for more details.

 *

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

 * JITCraft. If not, see http://www.gnu.org/licenses/.

 */

#ifndef _include_jc_structure_h_

#define _include_jc_structure_h_

#include "Objects.h"

#include "Handles.h"

#include "Vector.h"

namespace ke {

class Type;

class String;

class FixedArray;

// When describing composite structures, the GC must be able to trace interior

// references to Objects. To make this possible, maps that describe composite

// structures must provide a list of offsets into their objects that are

// traceable. StructureBufferBuilder assists with this.

class StructureBufferBuilder

{

  public:

    StructureBufferBuilder();

    bool add(Handle<Type> type, unsigned *offset);

    unsigned structureSize() const {

        return size_;

    }

    unsigned traceableOffsetCount() const {

        return offsets_.length();

    }

    const unsigned *offsets() {

        return offsets_.buffer();

    }

  private:

    Vector<unsigned> offsets_;

    unsigned size_;

};

}

#endif // _include_jc_structure_h_