dcstack.h

/*
 *
 *  Copyright (C) 1994-2004, OFFIS
 *
 *  This software and supporting documentation were developed by
 *
 *    Kuratorium OFFIS e.V.
 *    Healthcare Information and Communication Systems
 *    Escherweg 2
 *    D-26121 Oldenburg, Germany
 *
 *  THIS SOFTWARE IS MADE AVAILABLE,  AS IS,  AND OFFIS MAKES NO  WARRANTY
 *  REGARDING  THE  SOFTWARE,  ITS  PERFORMANCE,  ITS  MERCHANTABILITY  OR
 *  FITNESS FOR ANY PARTICULAR USE, FREEDOM FROM ANY COMPUTER DISEASES  OR
 *  ITS CONFORMITY TO ANY SPECIFICATION. THE ENTIRE RISK AS TO QUALITY AND
 *  PERFORMANCE OF THE SOFTWARE IS WITH THE USER.
 *
 *  Module:  dcmdata
 *
 *  Author:  Gerd Ehlers
 *
 *  Purpose: stack class
 *
 *  Last Update:      $Author: joergr $
 *  Update Date:      $Date: 2004/04/14 11:50:21 $
 *  CVS/RCS Revision: $Revision: 1.11 $
 *  Status:           $State: Exp $
 *
 *  CVS/RCS Log at end of file
 *
 */

#ifndef DCSTACK_H
#define DCSTACK_H

#include "osconfig.h"    /* make sure OS specific configuration is included first */
#include "dctypes.h"

class DcmObject;    // forward declaration


class DcmStackNode
{
public:
    DcmStackNode(DcmObject *obj);

    ~DcmStackNode();

    DcmObject *value() const;

private:
    DcmStackNode(const DcmStackNode &);

    DcmStackNode &operator=(const DcmStackNode &);

    DcmStackNode *link;

    DcmObject *objNodeValue;

    friend class DcmStack;
};


class DcmStack
{
public:
    DcmStack();

    DcmStack(const DcmStack& arg);

    ~DcmStack();

    DcmStack& operator=(const DcmStack &arg);

    OFBool operator==(const DcmStack& arg) const;

    OFBool operator<(const DcmStack& arg) const;
    
    DcmObject* push( DcmObject *obj );

    DcmObject* pop();

    DcmObject* top() const;

    DcmObject* elem(const unsigned long number) const;

    OFBool empty() const;

    unsigned long card() const;

    void clear();

private:
    DcmStackNode *topNode_;

    unsigned long cardinality_;
};


#endif  // DCSTACK_H


/*
 * CVS/RCS Log:
 * $Log: dcstack.h,v $
 * Revision 1.11  2004/04/14 11:50:21  joergr
 * Added const qualifier to parameter to keep Sun CC 2.0.1 quiet.
 *
 * Revision 1.10  2003/06/02 16:52:20  meichel
 * Cleaned up implementation of DcmStack, added doc++ comments
 *
 * Revision 1.9  2001/06/01 15:48:44  meichel
 * Updated copyright header
 *
 * Revision 1.8  2000/03/08 16:26:18  meichel
 * Updated copyright header.
 *
 * Revision 1.7  1999/03/31 09:24:47  meichel
 * Updated copyright header in module dcmdata
 *
 *
 */

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