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147 lines
3.2 KiB
147 lines
3.2 KiB
/***************************************************************************
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* Copyright (C) 2005 by David Saxton *
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* david@bluehaze.org *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#include "pin.h"
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#include "wire.h"
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#include <assert.h>
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Wire::Wire( Pin * startPin, Pin * endPin )
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{
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assert(startPin);
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assert(endPin);
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m_pStartPin = startPin;
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m_pEndPin = endPin;
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m_current = 0.;
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m_bCurrentIsKnown = false;
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m_pStartPin->addOutputWire(this);
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m_pEndPin->addInputWire(this);
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}
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Wire::~Wire()
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{
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}
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bool Wire::calculateCurrent()
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{
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if ( m_pStartPin->currentIsKnown() && m_pStartPin->numWires() < 2 )
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{
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m_current = m_pStartPin->current();
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m_bCurrentIsKnown = true;
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return true;
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}
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if ( m_pEndPin->currentIsKnown() && m_pEndPin->numWires() < 2 )
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{
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m_current = -m_pEndPin->current();
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m_bCurrentIsKnown = true;
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return true;
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}
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if ( m_pStartPin->currentIsKnown() )
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{
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double i = m_pStartPin->current();
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bool ok = true;
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const WireList outlist = m_pStartPin->outputWireList();
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WireList::const_iterator end = outlist.end();
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for ( WireList::const_iterator it = outlist.begin(); it != end && ok; ++it )
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{
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if ( *it && (Wire*)*it != this )
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{
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if ( (*it)->currentIsKnown() )
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i -= (*it)->current();
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else
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ok = false;
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}
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}
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const WireList inlist = m_pStartPin->inputWireList();
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end = inlist.end();
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for ( WireList::const_iterator it = inlist.begin(); it != end && ok; ++it )
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{
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if ( *it && (Wire*)*it != this )
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{
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if ( (*it)->currentIsKnown() )
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i += (*it)->current();
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else
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ok = false;
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}
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}
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if (ok)
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{
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m_current = i;
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m_bCurrentIsKnown = true;
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return true;
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}
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}
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if ( m_pEndPin->currentIsKnown() )
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{
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double i = -m_pEndPin->current();
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bool ok = true;
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const WireList outlist = m_pEndPin->outputWireList();
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WireList::const_iterator end = outlist.end();
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for ( WireList::const_iterator it = outlist.begin(); it != end && ok; ++it )
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{
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if ( *it && (Wire*)*it != this )
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{
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if ( (*it)->currentIsKnown() )
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i += (*it)->current();
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else
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ok = false;
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}
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}
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const WireList inlist = m_pEndPin->inputWireList();
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end = inlist.end();
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for ( WireList::const_iterator it = inlist.begin(); it != end && ok; ++it )
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{
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if ( *it && (Wire*)*it != this )
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{
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if ( (*it)->currentIsKnown() )
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i -= (*it)->current();
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else
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ok = false;
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}
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}
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if (ok)
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{
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m_current = i;
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m_bCurrentIsKnown = true;
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return true;
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}
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}
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m_bCurrentIsKnown = false;
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return false;
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}
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double Wire::voltage() const
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{
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return ( m_pStartPin->voltage() + m_pEndPin->voltage() )/2;
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}
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void Wire::setCurrentKnown( bool known )
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{
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m_bCurrentIsKnown = known;
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if (!known)
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m_current = 0.;
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}
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