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(
                QString("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");
//      m_desc = i18n("Insert missing adder help here.");

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

        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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