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#ifndef __PDelays_H
#define __PDelays_H
/*
* Copyright (c) 1999-2002 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: PDelays.h,v 1.7 2002/08/12 01:34:58 steve Exp $"
#endif

# include "svector.h"
# include <string>
# include <iostream>

#ifdef __GNUC__
#if __GNUC__ > 2
using namespace std;
#endif
#endif

class Design;
class NetScope;
class PExpr;

/*
* Various PForm objects can carry delays. These delays include rise,
* fall and decay times. This class arranges to carry the triplet.
*/
class PDelays {

    public:
      PDelays();
      ~PDelays();

/* Set the delay expressions. If the delete_flag is true, then
this object takes ownership of the expressions, and will
delete it in the destructor. */
      void set_delay(PExpr*);
      void set_delays(const svector<PExpr*>*del, bool delete_flag=true);

      void eval_delays(Design*des, NetScope*scope,
unsigned long&rise_time,
unsigned long&fall_time,
unsigned long&decay_time) const;

      void dump_delays(ostream&out) const;

    private:
      PExpr* delay_[3];
      bool delete_flag_;

    private: // not implemented
      PDelays(const PDelays&);
      PDelays& operator= (const PDelays&);
};

ostream& operator << (ostream&o, const PDelays&);

/*
* $Log: PDelays.h,v $
* Revision 1.7 2002/08/12 01:34:58 steve
* conditional ident string using autoconfig.
*
* Revision 1.6 2002/06/14 03:25:51 steve
* Compiler portability.
*
* Revision 1.5 2001/12/29 20:19:31 steve
* Do not delete delay expressions of UDP instances.
*
* Revision 1.4 2001/11/22 06:20:59 steve
* Use NetScope instead of string for scope path.
*
* Revision 1.3 2001/01/16 02:44:17 steve
* Use the iosfwd header if available.
*
* Revision 1.2 2000/02/23 02:56:53 steve
* Macintosh compilers do not support ident.
*
* Revision 1.1 1999/09/04 19:11:46 steve
* Add support for delayed non-blocking assignments.
*
*/
#endif
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