netinfo_list.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 1992-2023 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * 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.
 *
 * 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
 
#include <board.h>
#include <footprint.h>
#include <macros.h>
#include <pad.h>
#include <pcb_shape.h>
#include <pcb_track.h>
#include <zone.h>
#include <netinfo.h>
#include <wx/log.h>
 
 
// Constructor and destructor
NETINFO_LIST::NETINFO_LIST( BOARD* aParent ) :
 m_parent( aParent ),
 m_newNetCode( 0 )
{
 // Make sure that the unconnected net has number 0
 AppendNet( new NETINFO_ITEM( aParent, wxEmptyString, 0 ) );
}
 
 
NETINFO_LIST::~NETINFO_LIST()
{
 clear();
}
 
 
void NETINFO_LIST::clear()
{
 NETNAMES_MAP::iterator it, itEnd;
 
 for( it = m_netNames.begin(), itEnd = m_netNames.end(); it != itEnd; ++it )
 delete it->second;
 
 m_netNames.clear();
 m_netCodes.clear();
 m_newNetCode = 0;
}
 
 
NETINFO_ITEM* NETINFO_LIST::GetNetItem( int aNetCode ) const
{
 NETCODES_MAP::const_iterator result = m_netCodes.find( aNetCode );
 
 if( result != m_netCodes.end() )
 return (*result).second;
 
 return nullptr;
}
 
 
NETINFO_ITEM* NETINFO_LIST::GetNetItem( const wxString& aNetName ) const
{
 NETNAMES_MAP::const_iterator result = m_netNames.find( aNetName );
 
 if( result != m_netNames.end() )
 return (*result).second;
 
 return nullptr;
}
 
 
void NETINFO_LIST::RemoveNet( NETINFO_ITEM* aNet )
{
 bool removed = false;
 
 for( NETCODES_MAP::iterator i = m_netCodes.begin(); i != m_netCodes.end(); ++i )
 {
 if ( i->second == aNet )
 {
 removed = true;
 m_netCodes.erase(i);
 break;
 }
 }
 
 for( NETNAMES_MAP::iterator i = m_netNames.begin(); i != m_netNames.end(); ++i )
 {
 if ( i->second == aNet )
 {
 wxASSERT_MSG( removed, wxT( "NETINFO_LIST::RemoveNet: target net found in m_netNames "
 "but not m_netCodes!" ) );
 m_netNames.erase(i);
 break;
 }
 }
 
 if( removed )
 m_newNetCode = std::min( m_newNetCode, aNet->m_netCode - 1 );
}
 
 
void NETINFO_LIST::RemoveUnusedNets()
{
 NETCODES_MAP existingNets = m_netCodes;
 
 m_netCodes.clear();
 m_netNames.clear();
 
 for( std::pair<const int, NETINFO_ITEM*> item : existingNets )
 {
 if( item.second->IsCurrent() )
 {
 m_netNames.insert( std::make_pair( item.second->GetNetname(), item.second ) );
 m_netCodes.insert( std::make_pair( item.first, item.second ) );
 }
 }
}
 
 
void NETINFO_LIST::AppendNet( NETINFO_ITEM* aNewElement )
{
 // if there is a net with such name then just assign the correct number
 NETINFO_ITEM* sameName = GetNetItem( aNewElement->GetNetname() );
 
 if( sameName != nullptr )
 {
 aNewElement->m_netCode = sameName->GetNetCode();
 
 return;
 }
 else if( aNewElement->m_netCode != (int) m_netCodes.size() || aNewElement->m_netCode < 0 )
 {
 // be sure that net codes are consecutive
 // negative net code means that it has to be auto assigned
 aNewElement->m_netCode = getFreeNetCode();
 }
 
 // net names & codes are supposed to be unique
 assert( GetNetItem( aNewElement->GetNetname() ) == nullptr );
 assert( GetNetItem( aNewElement->GetNetCode() ) == nullptr );
 
 // add an entry for fast look up by a net name using a map
 m_netNames.insert( std::make_pair( aNewElement->GetNetname(), aNewElement ) );
 m_netCodes.insert( std::make_pair( aNewElement->GetNetCode(), aNewElement ) );
}
 
 
void NETINFO_LIST::buildListOfNets()
{
 // Restore the initial state of NETINFO_ITEMs
 for( NETINFO_ITEM* net : *this )
 net->Clear();
 
 m_parent->SynchronizeNetsAndNetClasses( false );
 m_parent->SetAreasNetCodesFromNetNames();
}
 
 
#if defined(DEBUG)
void NETINFO_LIST::Show() const
{
 int i = 0;
 NETNAMES_MAP::const_iterator it, itEnd;
 
 for( it = m_netNames.begin(), itEnd = m_netNames.end(); it != itEnd; ++it )
 {
 wxLogDebug( wxT( "[%d]: netcode:%d netname:<%s>\n" ),
 i++,
 it->second->GetNetCode(),
 TO_UTF8( it->second->GetNetname() ) );
 }
}
#endif
 
 
int NETINFO_LIST::getFreeNetCode()
{
 do
 {
 if( m_newNetCode < 0 )
 m_newNetCode = 0;
 } while( m_netCodes.count( ++m_newNetCode ) != 0 );
 
 return m_newNetCode;
}
 
 
int NETINFO_MAPPING::Translate( int aNetCode ) const
{
 std::map<int, int>::const_iterator value = m_netMapping.find( aNetCode );
 
 if( value != m_netMapping.end() )
 return value->second;
 
 // There was no entry for the given net code
 return aNetCode;
}
 
 
void NETINFO_MAPPING::Update()
{
 // Collect all the used nets
 std::set<int> nets;
 
 // Be sure that the unconnected gets 0 and is mapped as 0
 nets.insert( 0 );
 
 // Zones
 for( ZONE* zone : m_board->Zones() )
 nets.insert( zone->GetNetCode() );
 
 // Tracks
 for( PCB_TRACK* track : m_board->Tracks() )
 nets.insert( track->GetNetCode() );
 
 for( BOARD_ITEM* item : m_board->Drawings() )
 {
 if( item->Type() != PCB_SHAPE_T )
 continue;
 
 PCB_SHAPE* shape = static_cast<PCB_SHAPE*>( item );
 
 if( shape->GetNetCode() > 0 )
 nets.insert( shape->GetNetCode() );
 }
 
 // footprints/pads
 for( FOOTPRINT* footprint : m_board->Footprints() )
 {
 for( PAD* pad : footprint->Pads() )
 nets.insert( pad->GetNetCode() );
 }
 
 // Prepare the new mapping
 m_netMapping.clear();
 
 // Now the nets variable stores all the used net codes (not only for pads) and we are ready to
 // assign new consecutive net numbers
 int newNetCode = 0;
 
 for( auto net : nets )
 m_netMapping[net] = newNetCode++;
}
 
 
NETINFO_ITEM* NETINFO_MAPPING::iterator::operator*() const
{
 return m_mapping->m_board->FindNet( m_iterator->first );
}
 
 
NETINFO_ITEM* NETINFO_MAPPING::iterator::operator->() const
{
 return m_mapping->m_board->FindNet( m_iterator->first );
}
 
 
const int NETINFO_LIST::UNCONNECTED = 0;
const int NETINFO_LIST::ORPHANED = -1;