Pcbnew: fix issues and potential issues when reading board files and mainly old board files, and enhance the DRC tests and Delete Single Pad Net option when reading a netlist:

* Delete Single Pad Net option does not delete the net if a zone use this net (i.e. is attached to this pad).
* pcb_parser accept now negative netcodes in zones (can happen with old files, which previously could crash Pcbnew)
* pcb_parser accept now files with incorrect or missing net count  (can happen with old files, which previously could crash Pcbnew)
* if a zone has a non-existent net name it now keep this net name, and DRC detect it (previously, the net name was lost, and the DRC did not tected this issue).
* Drc test: now detect a "dead" net, i.e. a net with 0 pads, but still used by a zone. It happens easily after a schematic modification, when a net disappears or is renamed.

pcbnew/class_board.cpp

@@ -6,11 +6,11 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr
+ * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
  * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
  * Copyright (C) 2011 Wayne Stambaugh <stambaughw@verizon.net>
  *
- * Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2015 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
@@ -2459,14 +2459,14 @@ void BOARD::ReplaceNetlist( NETLIST& aNetlist, bool aDeleteSinglePadNets,
         }
     }
 
+    // We need the pad list, for next tests.
+    // padlist is the list of pads, sorted by netname.
+    BuildListOfNets();
+    std::vector<D_PAD*> padlist = GetPads();
+
     // If needed, remove the single pad nets:
     if( aDeleteSinglePadNets && !aNetlist.IsDryRun() )
     {
-        BuildListOfNets();
-
-        std::vector<D_PAD*> padlist = GetPads();
-
-        // padlist is the list of pads, sorted by netname.
         int         count = 0;
         wxString    netname;
         D_PAD*      pad = NULL;
@@ -2482,6 +2482,28 @@ void BOARD::ReplaceNetlist( NETLIST& aNetlist, bool aDeleteSinglePadNets,
             if( netname != pad->GetNetname() )  // End of net
             {
                 if( previouspad && count == 1 )
+                {
+                    // First, see if we have a copper zone attached to this pad.
+                    // If so, this is not really a single pad net
+
+                    for( int ii = 0; ii < GetAreaCount(); ii++ )
+                    {
+                        ZONE_CONTAINER* zone = GetArea( ii );
+
+                        if( !zone->IsOnCopperLayer() )
+                            continue;
+
+                        if( zone->GetIsKeepout() )
+                            continue;
+
+                        if( zone->GetNet() == previouspad->GetNet() )
+                        {
+                            count++;
+                            break;
+                        }
+                    }
+
+                    if( count == 1 )    // Really one pad, and nothing else
                     {
                         if( aReporter && aReporter->ReportAll() )
                         {
@@ -2494,6 +2516,8 @@ void BOARD::ReplaceNetlist( NETLIST& aNetlist, bool aDeleteSinglePadNets,
 
                         previouspad->SetNetCode( NETINFO_LIST::UNCONNECTED );
                     }
+                }
+
                 netname = pad->GetNetname();
                 count = 1;
             }
@@ -2515,6 +2539,10 @@ void BOARD::ReplaceNetlist( NETLIST& aNetlist, bool aDeleteSinglePadNets,
     // They should exist in footprints, otherwise the footprint is wrong
     // note also references or time stamps are updated, so we use only
     // the reference to find a footprint
+    //
+    // Also verify if zones have acceptable nets, i.e. nets with pads.
+    // Zone with no pad belongs to a "dead" net which happens after changes in schematic
+    // when no more pad use this net name.
     if( aReporter && aReporter->ReportErrors() )
     {
         wxString padname;
@@ -2543,6 +2571,22 @@ void BOARD::ReplaceNetlist( NETLIST& aNetlist, bool aDeleteSinglePadNets,
                 aReporter->Report( msg );
             }
         }
+
+        // Test copper zones to detect "dead" nets (nets without any pad):
+        for( int ii = 0; ii < GetAreaCount(); ii++ )
+        {
+            ZONE_CONTAINER* zone = GetArea( ii );
+
+            if( !zone->IsOnCopperLayer() || zone->GetIsKeepout() )
+                continue;
+
+            if( zone->GetNet()->GetNodesCount() == 0 )
+            {
+                msg.Printf( _( "* Warning: copper zone (net name '%s'): net has no pad*\n" ),
+                           GetChars( zone->GetNet()->GetNetname() ) );
+                aReporter->Report( msg );
+            }
+        }
     }
 }
 

pcbnew/class_board_connected_item.cpp

@@ -1,9 +1,9 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr
+ * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
  * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
- * Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2015 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
@@ -50,10 +50,10 @@ BOARD_CONNECTED_ITEM::BOARD_CONNECTED_ITEM( const BOARD_CONNECTED_ITEM& aItem )
 
 void BOARD_CONNECTED_ITEM::SetNetCode( int aNetCode )
 {
-    assert( aNetCode >= 0 );
+//    assert( aNetCode >= 0 );
     BOARD* board = GetBoard();
 
-    if( board )
+    if( ( aNetCode >= 0 ) && board )
         m_netinfo = board->FindNet( aNetCode );
     else
         m_netinfo = &NETINFO_LIST::ORPHANED;

pcbnew/class_drc_item.cpp

@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2007 Dick Hollenbeck, dick@softplc.com
- * Copyright (C) 2007 KiCad Developers, see change_log.txt for contributors.
+ * Copyright (C) 2015 KiCad Developers, see change_log.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
@@ -75,8 +75,10 @@ wxString DRC_ITEM::GetErrorText() const
         return wxString( _( "Copper area inside copper area" ) );
     case COPPERAREA_CLOSE_TO_COPPERAREA:
         return wxString( _( "Copper areas intersect or are too close" ) );
-    case DRCE_NON_EXISTANT_NET_FOR_ZONE_OUTLINE:
+
-        return wxString( _( "Copper area has a nonexistent net name" ) );
+    case DRCE_SUSPICIOUS_NET_FOR_ZONE_OUTLINE:
+        return wxString( _( "Copper area belongs a net which has no pads. This is strange" ) );
+
     case DRCE_HOLE_NEAR_PAD:
         return wxString( _( "Hole near pad" ) );
     case DRCE_HOLE_NEAR_TRACK:

pcbnew/class_netinfo.h

@@ -320,7 +320,7 @@ public:
             return NULL;
     }
 
-    ///> Constant that holds the unconnected net number
+    ///> Constant that holds the unconnected net number (typically 0)
     static const int UNCONNECTED;
 
     ///> NETINFO_ITEM meaning that there was no net assigned for an item, as there was no

pcbnew/class_zone.cpp

@@ -1,9 +1,9 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr
+ * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
  * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
- * Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2015 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
@@ -625,27 +625,21 @@ void ZONE_CONTAINER::GetMsgPanelInfo( std::vector< MSG_PANEL_ITEM >& aList )
     {
         if( GetNetCode() >= 0 )
         {
-            NETINFO_ITEM* equipot = GetNet();
+            NETINFO_ITEM* net = GetNet();
 
-            if( equipot )
+            if( net )
-                msg = equipot->GetNetname();
+                msg = net->GetNetname();
-            else
+            else    // Should not occur
-                msg = wxT( "<noname>" );
+                msg = _( "<unknown>" );
         }
         else    // a netcode < 0 is an error
-        {
+            msg = wxT( "<error>" );
-            msg = wxT( " [" );
-            msg << GetNetname() + wxT( "]" );
-            msg << wxT( " <" ) << _( "Not Found" ) << wxT( ">" );
-        }
 
         aList.push_back( MSG_PANEL_ITEM( _( "NetName" ), msg, RED ) );
 
-#if 1
         // Display net code : (useful in test or debug)
         msg.Printf( wxT( "%d" ), GetNetCode() );
         aList.push_back( MSG_PANEL_ITEM( _( "NetCode" ), msg, RED ) );
-#endif
 
         // Display priority level
         msg.Printf( wxT( "%d" ), GetPriority() );

pcbnew/class_zone.h

@@ -2,8 +2,8 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2004 Jean-Pierre Charras, jaen-pierre.charras@gipsa-lab.inpg.com
+ * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
- * Copyright (C) 1992-2011 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2015 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
@@ -578,7 +578,6 @@ public:
     void SetDoNotAllowVias( bool aEnable ) { m_doNotAllowVias = aEnable; }
     void SetDoNotAllowTracks( bool aEnable ) { m_doNotAllowTracks = aEnable; }
 
-
 #if defined(DEBUG)
     virtual void Show( int nestLevel, std::ostream& os ) const { ShowDummy( os ); }    // override
 #endif
@@ -632,8 +631,8 @@ private:
     /// The index of the corner being moved or -1 if no corner is selected.
     int                   m_CornerSelection;
 
-    int                   m_localFlgs;                ///< Flags used in polygon calculations.
+    /// Variable used in polygon calculations.
-
+    int                   m_localFlgs;
 
     /** Segments used to fill the zone (#m_FillMode ==1 ), when fill zone by segment is used.
      *  In this case the segments have #m_ZoneMinThickness width.

pcbnew/drc.cpp

@@ -2,9 +2,9 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2004-2014 Jean-Pierre Charras, jp.charras at wanadoo.fr
+ * Copyright (C) 2004-2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
  * Copyright (C) 2014 Dick Hollenbeck, dick@softplc.com
- * Copyright (C) 2014 KiCad Developers, see change_log.txt for contributors.
+ * Copyright (C) 2015 KiCad Developers, see change_log.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
@@ -564,6 +564,10 @@ void DRC::testZones()
     // if a netcode is < 0 the netname was not found when reading a netlist
     // if a netcode is == 0 the netname is void, and the zone is not connected.
     // This is allowed, but i am not sure this is a good idea
+    //
+    // In recent Pcbnew versions, the netcode is always >= 0, but an internal net name
+    // is stored, and initalized from the file or the zone properpies editor.
+    // if it differs from the net name from net code, there is a DRC issue
     for( int ii = 0; ii < m_pcb->GetAreaCount(); ii++ )
     {
         ZONE_CONTAINER* test_area = m_pcb->GetArea( ii );
@@ -571,13 +575,21 @@ void DRC::testZones()
         if( !test_area->IsOnCopperLayer() )
             continue;
 
-        if( test_area->GetNetCode() < 0 )
+        int netcode = test_area->GetNetCode();
+
+        // a netcode < 0 or > 0 and no pad in net  is a error or strange
+        // perhaps a "dead" net, which happens when all pads in this net were removed
+        // Remark: a netcode < 0 should not happen (this is more a bug somewhere)
+        int pads_in_net = (test_area->GetNetCode() > 0) ?
+                            test_area->GetNet()->GetNodesCount() : 1;
+
+        if( ( netcode < 0 ) || pads_in_net == 0 )
         {
             m_currentMarker = fillMarker( test_area,
-                                          DRCE_NON_EXISTANT_NET_FOR_ZONE_OUTLINE, m_currentMarker );
+                                          DRCE_SUSPICIOUS_NET_FOR_ZONE_OUTLINE, m_currentMarker );
             m_pcb->Add( m_currentMarker );
             m_mainWindow->GetGalCanvas()->GetView()->Add( m_currentMarker );
-            m_currentMarker = 0;
+            m_currentMarker = NULL;
         }
     }
 

pcbnew/drc_stuff.h

@@ -6,7 +6,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2007 Dick Hollenbeck, dick@softplc.com
- * Copyright (C) 2007 KiCad Developers, see change_log.txt for contributors.
+ * Copyright (C) 2015 KiCad Developers, see change_log.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
@@ -60,7 +60,7 @@
 #define DRCE_MICRO_VIA_INCORRECT_LAYER_PAIR    21   ///< micro via's layer pair incorrect (layers must be adjacent)
 #define COPPERAREA_INSIDE_COPPERAREA           22   ///< copper area outlines intersect
 #define COPPERAREA_CLOSE_TO_COPPERAREA         23   ///< copper area outlines are too close
-#define DRCE_NON_EXISTANT_NET_FOR_ZONE_OUTLINE 24   ///< copper area outline has an incorrect netcode due to a netname not found
+#define DRCE_SUSPICIOUS_NET_FOR_ZONE_OUTLINE   24   ///< copper area has a net but no pads in nets, which is suspicious
 #define DRCE_HOLE_NEAR_PAD                     25   ///< hole too close to pad
 #define DRCE_HOLE_NEAR_TRACK                   26   ///< hole too close to track
 #define DRCE_TOO_SMALL_TRACK_WIDTH             27   ///< Too small track width

pcbnew/pcb_parser.cpp

@@ -112,6 +112,17 @@ void PCB_PARSER::init()
 }
 
 
+void PCB_PARSER::pushValueIntoMap( int aIndex, int aValue )
+{
+    // Add aValue in netcode mapping (m_netCodes) at index aNetCode
+    // ensure there is room in m_netCodes for that, and add room if needed.
+
+    if( (int)m_netCodes.size() <= aIndex )
+        m_netCodes.resize( aIndex+1 );
+
+    m_netCodes[aIndex] = aValue;
+}
+
 double PCB_PARSER::parseDouble() throw( IO_ERROR )
 {
     char* tmp;
@@ -1194,7 +1205,7 @@ void PCB_PARSER::parseNETINFO_ITEM() throw( IO_ERROR, PARSE_ERROR )
         m_board->AppendNet( net );
 
         // Store the new code mapping
-        m_netCodes[netCode] = net->GetNet();
+        pushValueIntoMap( netCode, net->GetNet() );
     }
 }
 
@@ -2526,6 +2537,8 @@ ZONE_CONTAINER* PCB_PARSER::parseZONE_CONTAINER() throw( IO_ERROR, PARSE_ERROR )
     int     hatchPitch = Mils2iu( CPolyLine::GetDefaultHatchPitchMils() );
     wxPoint pt;
     T       token;
+    int     tmp;
+    wxString    netnameFromfile;    // the zone net name find in file
 
     // bigger scope since each filled_polygon is concatenated in here
     CPOLYGONS_LIST pts;
@@ -2545,20 +2558,19 @@ ZONE_CONTAINER* PCB_PARSER::parseZONE_CONTAINER() throw( IO_ERROR, PARSE_ERROR )
             // Init the net code only, not the netname, to be sure
             // the zone net name is the name read in file.
             // (When mismatch, the user will be prompted in DRC, to fix the actual name)
-            zone->SetNetCode( getNetCode( parseInt( "net number" ) ) );
+            tmp = getNetCode( parseInt( "net number" ) );
+
+            if( tmp < 0 )
+                tmp = 0;
+
+            zone->SetNetCode( tmp );
+
             NeedRIGHT();
             break;
 
         case T_net_name:
             NeedSYMBOLorNUMBER();
-            if( zone->GetNet()->GetNetname() != FromUTF8() )
+            netnameFromfile = FromUTF8();
-            {
-                wxString msg;
-                msg.Printf( _( "There is a zone that belongs to a not existing net"
-                               "(%s), you should verify it." ), GetChars( FromUTF8() ) );
-                DisplayError( NULL, msg );
-                zone->SetNetCode( NETINFO_LIST::UNCONNECTED );
-            }
             NeedRIGHT();
             break;
 
@@ -2829,10 +2841,45 @@ ZONE_CONTAINER* PCB_PARSER::parseZONE_CONTAINER() throw( IO_ERROR, PARSE_ERROR )
     if( pts.GetCornersCount() )
         zone->AddFilledPolysList( pts );
 
-    // Ensure keepout does not have a net (which have no sense for a keepout zone)
+    // Ensure keepout and non copper zones do not have a net
-    if( zone->GetIsKeepout() )
+    // (which have no sense for these zones)
+    // the netcode 0 is used for these zones
+    bool zone_has_net = zone->IsOnCopperLayer() && !zone->GetIsKeepout();
+
+    if( !zone_has_net )
         zone->SetNetCode( NETINFO_LIST::UNCONNECTED );
 
+    // Ensure the zone net name is valid, and matches the net code, for copper zones
+    if( zone_has_net && ( zone->GetNet()->GetNetname() != netnameFromfile ) )
+    {
+        // Can happens which old boards, with nonexistent nets ...
+        // or after being edited by hand
+        // We try to fix the mismatch.
+        NETINFO_ITEM* net = m_board->FindNet( netnameFromfile );
+
+        if( net )   // An existing net has the same net name. use it for the zone
+            zone->SetNetCode( net->GetNet() );
+        else    // Not existing net: add a new net to keep trace of the zone netname
+        {
+            int newnetcode = m_board->GetNetCount();
+            net = new NETINFO_ITEM( m_board, netnameFromfile, newnetcode );
+            m_board->AppendNet( net );
+
+            // Store the new code mapping
+            pushValueIntoMap( newnetcode, net->GetNet() );
+            // and update the zone netcode
+            zone->SetNetCode( net->GetNet() );
+
+            // Prompt the user
+            wxString msg;
+            msg.Printf( _( "There is a zone that belongs to a not existing net\n"
+                           "\"%s\"\n"
+                           "you should verify and edit it (run DRC test)." ),
+                           GetChars( netnameFromfile ) );
+            DisplayError( NULL, msg );
+        }
+    }
+
     return zone.release();
 }
 

pcbnew/pcb_parser.h

@@ -69,15 +69,24 @@ class PCB_PARSER : public PCB_LEXER
     std::vector<int>    m_netCodes;         ///< net codes mapping for boards being loaded
 
     ///> Converts net code using the mapping table if available,
-    ///> otherwise returns unchanged net code
+    ///> otherwise returns unchanged net code if < 0 or if is is out of range
     inline int getNetCode( int aNetCode )
     {
-        if( aNetCode < (int) m_netCodes.size() )
+        if( ( aNetCode >= 0 ) && ( aNetCode < (int) m_netCodes.size() ) )
             return m_netCodes[aNetCode];
 
         return aNetCode;
     }
 
+    /**
+     * function pushValueIntoMap
+     * Add aValue value in netcode mapping (m_netCodes) at index aIndex
+     * ensure there is room in m_netCodes for that, and add room if needed.
+     * @param aIndex = the index ( expected >=0 )of the location to use in m_netCodes
+     * @param aValue = the netcode value to map
+     */
+    void pushValueIntoMap( int aIndex, int aValue );
+
     /**
      * Function init
      * clears and re-establishes m_layerMap with the default layer names.

pcbnew/zones_by_polygon.cpp

@@ -1,10 +1,10 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr
+ * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
  * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
  * Copyright (C) 2012 Wayne Stambaugh <stambaughw@verizon.net>
- * Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2015 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