File indexing completed on 2025-04-20 11:09:33

 /***************************************************************************
  *   Copyright (C) 2005 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 "wire.h"
 #include "pin.h"
 
 #include <cassert>
 
 #include <ktechlab_debug.h>
 
 Wire::Wire(Pin *startPin, Pin *endPin)
 {
     assert(startPin);
     assert(endPin);
 
     m_pStartPin = startPin;
     m_pEndPin = endPin;
     m_current = 0.;
     m_bCurrentIsKnown = false;
 
     m_pStartPin->addOutputWire(this);
     m_pEndPin->addInputWire(this);
 }
 
 Wire::~Wire()
 {
 }
 
 bool Wire::calculateCurrent()
 {
     if (m_pStartPin->currentIsKnown() && m_pStartPin->numWires() < 2) {
         m_current = m_pStartPin->current();
         m_bCurrentIsKnown = true;
         return true;
     }
 
     if (m_pEndPin->currentIsKnown() && m_pEndPin->numWires() < 2) {
         m_current = -m_pEndPin->current();
         m_bCurrentIsKnown = true;
         return true;
     }
 
     if (m_pStartPin->currentIsKnown()) {
         double i = m_pStartPin->current();
         bool ok = true;
 
         const WireList outlist = m_pStartPin->outputWireList();
         WireList::const_iterator end = outlist.end();
         for (WireList::const_iterator it = outlist.begin(); it != end && ok; ++it) {
             if (*it && static_cast<Wire *>(*it) != this) {
                 if ((*it)->currentIsKnown())
                     i -= (*it)->current();
                 else
                     ok = false;
             }
         }
 
         const WireList inlist = m_pStartPin->inputWireList();
         end = inlist.end();
         for (WireList::const_iterator it = inlist.begin(); it != end && ok; ++it) {
             if (*it && static_cast<Wire *>(*it) != this) {
                 if ((*it)->currentIsKnown())
                     i += (*it)->current();
                 else
                     ok = false;
             }
         }
 
         if (ok) {
             m_current = i;
             m_bCurrentIsKnown = true;
             return true;
         }
     }
 
     if (m_pEndPin->currentIsKnown()) {
         double i = -m_pEndPin->current();
         bool ok = true;
         const WireList outlist = m_pEndPin->outputWireList();
 
         WireList::const_iterator end = outlist.end();
         for (WireList::const_iterator it = outlist.begin(); it != end && ok; ++it) {
             if (*it && static_cast<Wire *>(*it) != this) {
                 if ((*it)->currentIsKnown())
                     i += (*it)->current();
                 else
                     ok = false;
             }
         }
 
         const WireList inlist = m_pEndPin->inputWireList();
         end = inlist.end();
         for (WireList::const_iterator it = inlist.begin(); it != end && ok; ++it) {
             if (*it && static_cast<Wire *>(*it) != this) {
                 if ((*it)->currentIsKnown())
                     i -= (*it)->current();
                 else
                     ok = false;
             }
         }
 
         if (ok) {
             m_current = i;
             m_bCurrentIsKnown = true;
             return true;
         }
     }
 
     m_bCurrentIsKnown = false;
     return false;
 }
 
 double Wire::voltage() const
 {
     double temp;
 
     // TODO: the external connections trigger this, need to figure out how
     // the Probe classes manage to get away with unknown voltages.
     if ((temp = m_pStartPin->voltage() - m_pEndPin->voltage())) {
         qCWarning(KTL_LOG) << "Wire voltage error: " << temp << m_pStartPin->voltage() << m_pEndPin->voltage();
     }
 
     return m_pStartPin->voltage();
 }
 
 void Wire::setCurrentKnown(bool known)
 {
     m_bCurrentIsKnown = known;
     if (!known)
         m_current = 0.;
 }