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

 *

 * Copyright (C) 2012 David Anderson

 *

 * This file is part of SourcePawn.

 *

 * SourcePawn 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.

 * 

 * SourcePawn 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

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

 */

#ifndef _include_sourcepawn_box_h_

#define _include_sourcepawn_box_h_

#include "Objects.h"

#include "Handles.h"

#include "Heap.h"

#include "Types.h"

namespace ke {

class Type;

class Box : public Object

{

    Barriered<Type> type_;

    union {

        Object *obj;

        float f;

        int i32;

    } u;

  public:

    static Box *New(Zone *zone, Handle<Type> type, int i32, Heap::Tenure = Heap::Tenure_Default);

    static Box *New(Zone *zone, Handle<Type> type, float f, Heap::Tenure = Heap::Tenure_Default);

    static Box *NewObj(Zone *zone, Handle<Type> type, Handle<Object> obj,

                       Heap::Tenure = Heap::Tenure_Default);

    Type *type() {

        return type_;

    }

    int toInt32() {

        assert(type()->pod() == PrimitiveType_Int32);

        return u.i32;

    }

    float toFloat() {

        assert(type()->pod() == PrimitiveType_Float);

        return u.f;

    }

    Object *toObject() {

        assert(type()->isTraceable());

        return u.obj;

    }

    // Begin GC descriptor.

    static inline size_t offsetOfType() {

        return OFFSETOF(Box, type_);

    }

    static inline size_t offsetOfObj() {

        return OFFSETOF(Box, u.obj);

    }

    // End GC descriptor.

    static inline Box *cast(Object *obj) {

        assert(!obj || obj->is(MapKind_Box));

        return reinterpret_cast<Box *>(obj);

    }

};

}

#endif // _include_sourcepawn_box_h_