/*
 * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef _PACKAGE__HPKG__PRIVATE__STACKER_H_
#define _PACKAGE__HPKG__PRIVATE__STACKER_H_


namespace BPackageKit {

namespace BHPKG {

namespace BPrivate {


template<typename Type>
class Stacker {
public:
        Stacker(Type*& location, Type* element)
                :
                fLocation(&location),
                fPreviousElement(location)
        {
                *fLocation = element;
        }

        Stacker(Type** location, Type* element)
                :
                fLocation(location),
                fPreviousElement(*location)
        {
                *fLocation = element;
        }

        ~Stacker()
        {
                if (fLocation != NULL)
                        *fLocation = fPreviousElement;
        }

private:
        Type**  fLocation;
        Type*   fPreviousElement;
};


}       // namespace BPrivate

}       // namespace BHPKG

}       // namespace BPackageKit


#endif  // _PACKAGE__HPKG__PRIVATE__STACKER_H_