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fulladder.cpp

/***************************************************************************
 *   Copyright (C) 2004 by David Saxton                                    *
 *   david@bluehaze.org                                                    *
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/

#include "fulladder.h"

#include "logic.h"
#include "libraryitem.h"

#include <kiconloader.h>
#include <klocale.h>


Item* FullAdder::construct( ItemDocument *itemDocument, bool newItem, const char *id )
{
      return new FullAdder( (ICNDocument*)itemDocument, newItem, id );
}

LibraryItem* FullAdder::libraryItem()
{
      return new LibraryItem(
            "ec/adder",
            i18n("Adder"),
            i18n("Integrated Circuits"),
            "ic1.png",
            LibraryItem::lit_component,
            FullAdder::construct
                  );
}

FullAdder::FullAdder( ICNDocument *icnDocument, bool newItem, const char *id )
      : Component( icnDocument, newItem, (id) ? id : "adder" )
{
      m_name = i18n("Adder");

      ALogic = BLogic = inLogic = 0l;
      outLogic = SLogic = 0l;

      QStringList pins = QStringList::split( ',', "A,B,>,,S,C", true );
      initDIPSymbol( pins, 48 );
      initDIP(pins);
      
      ECNode *node;
      
      node =  ecNodeWithID("S");
      SLogic = createLogicOut( node, false );
      
      node = ecNodeWithID("C");
      outLogic = createLogicOut( node, false );
      
      node = ecNodeWithID("A");
      ALogic = createLogicIn(node);
      
      node = ecNodeWithID("B");
      BLogic = createLogicIn(node);
      
      node = ecNodeWithID(">");
      inLogic = createLogicIn(node);
      
      
      ALogic->setCallback( this, (CallbackPtr)(&FullAdder::inStateChanged) );
      BLogic->setCallback( this, (CallbackPtr)(&FullAdder::inStateChanged) );
      inLogic->setCallback( this, (CallbackPtr)(&FullAdder::inStateChanged) );
}

FullAdder::~FullAdder()
{
}


void FullAdder::inStateChanged( bool /*state*/ )
{
      const bool A = ALogic->isHigh();
      const bool B = BLogic->isHigh();
      const bool in = inLogic->isHigh();
      
      const bool out = (!A && B && in) || (A && !B && in) || (A && B);
      const bool S = (!A && !B && in) || (!A && B && !in) || (A && !B && !in) || (A && B && in);
      
      SLogic->setHigh(S);
      outLogic->setHigh(out);
}



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