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#ifndef __functor_H
#define __functor_H
/*
* Copyright (c) 1999-2000 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
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: functor.h,v 1.17 2000/09/17 21:26:15 steve Exp $"
#endif

/*
* The functor is an object that can be applied to a design to
* transform it. This is different from the target_t, which can only
* scan the design but not transform it in any way.
*
* When a functor it scanning a process, signal or node, the functor
* is free to manipulate the list by deleting items, including the
* node being scanned. The Design class scanner knows how to handle
* the situation. However, if objects are added to the netlist, there
* is no guarantee that object will be scanned unless the functor is
* rerun.
*/

class Design;
class NetNet;
class NetProcTop;

struct functor_t {
      virtual ~functor_t();

/* Events are scanned here. */
      virtual void event(class Design*des, class NetEvent*);

/* This is called once for each signal in the design. */
      virtual void signal(class Design*des, class NetNet*);

/* This method is called for each process in the design. */
      virtual void process(class Design*des, class NetProcTop*);

/* This method is called for each structural adder. */
      virtual void lpm_add_sub(class Design*des, class NetAddSub*);

/* This method is called for each structural comparator. */
      virtual void lpm_compare(class Design*des, class NetCompare*);

/* This method is called for each structural constant. */
      virtual void lpm_const(class Design*des, class NetConst*);

/* This method is called for each structural constant. */
      virtual void lpm_divide(class Design*des, class NetDivide*);

/* This method is called for each structural constant. */
      virtual void lpm_modulo(class Design*des, class NetModulo*);

/* This method is called for each FF in the design. */
      virtual void lpm_ff(class Design*des, class NetFF*);

/* Handle LPM combinational logic devices. */
      virtual void lpm_logic(class Design*des, class NetLogic*);

/* This method is called for each multiplier. */
      virtual void lpm_mult(class Design*des, class NetMult*);

/* This method is called for each MUX. */
      virtual void lpm_mux(class Design*des, class NetMux*);
};

struct proc_match_t {
      virtual ~proc_match_t();

      virtual int assign(class NetAssign*);
      virtual int assign_mem(class NetAssignMem*);
      virtual int assign_nb(class NetAssignNB*);
      virtual int assign_mem_nb(class NetAssignMemNB*);
      virtual int condit(class NetCondit*);
      virtual int event_wait(class NetEvWait*);
      virtual int block(class NetBlock*);
};


/*
* $Log: functor.h,v $
* Revision 1.17 2000/09/17 21:26:15 steve
* Add support for modulus (Eric Aardoom)
*
* Revision 1.16 2000/08/01 02:48:42 steve
* Support <= in synthesis of DFF and ram devices.
*
* Revision 1.15 2000/07/16 04:56:07 steve
* Handle some edge cases during node scans.
*
* Revision 1.14 2000/07/15 05:13:44 steve
* Detect muxing Vz as a bufufN.
*
* Revision 1.13 2000/04/20 00:28:03 steve
* Catch some simple identity compareoptimizations.
*
* Revision 1.12 2000/04/18 04:50:19 steve
* Clean up unneeded NetEvent objects.
*
* Revision 1.11 2000/04/12 20:02:53 steve
* Finally remove the NetNEvent and NetPEvent classes,
* Get synthesis working with the NetEvWait class,
* and get started supporting multiple events in a
* wait in vvm.
*
* Revision 1.10 2000/04/01 21:40:22 steve
* Add support for integer division.
*
* Revision 1.9 2000/02/23 02:56:54 steve
* Macintosh compilers do not support ident.
*
* Revision 1.8 2000/02/13 04:35:43 steve
* Include some block matching from Larry.
*
* Revision 1.7 2000/01/13 03:35:35 steve
* Multiplication all the way to simulation.
*
* Revision 1.6 1999/12/30 04:19:12 steve
* Propogate constant 0 in low bits of adders.
*
* Revision 1.5 1999/12/17 06:18:16 steve
* Rewrite the cprop functor to use the functor_t interface.
*/
#endif
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