gpcb_plugin.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 Wayne Stambaugh <[email protected]>
 * Copyright (C) 1992-2021 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 <wildcards_and_files_ext.h>
#include <trace_helpers.h>
#include <math/util.h> // for KiROUND

#include <board.h>
#include <footprint.h>
#include <pad.h>
#include <locale_io.h>
#include <macros.h>
#include <pcb_text.h>
#include <pcb_shape.h>
#include <fp_shape.h>
#include <plugins/geda/gpcb_plugin.h>
#include <wx_filename.h>

#include <wx/dir.h>
#include <wx/log.h>
#include <wx/filename.h>
#include <wx/wfstream.h>
#include <boost/ptr_container/ptr_map.hpp>


static inline long parseInt( const wxString& aValue, double aScalar )
{
 double value = std::numeric_limits<double>::max();

 /*
 * In 2011 gEDA/pcb introduced values with units, like "10mm" or "200mil".
 * Unit-less values are still centimils (100000 units per inch), like with
 * the previous format.
 *
 * Distinction between the even older format (mils, 1000 units per inch)
 * and the pre-2011 format is done in ::parseFOOTPRINT already; the
 * distinction is by whether an object definition opens with '(' or '['.
 * All values with explicit unit open with a '[' so there's no need to
 * consider this distinction when parsing them.
 *
 * The solution here is to watch for a unit and, if present, convert the
 * value to centimils. All unit-less values are read unaltered. This way
 * the code below can continue to consider all read values to be in mils or
 * centimils. It also matches the strategy gEDA/pcb uses for backwards
 * compatibility with its own layouts.
 *
 * Fortunately gEDA/pcb allows only units 'mil' and 'mm' in files, see
 * definition of ALLOW_READABLE in gEDA/pcb's pcb_printf.h. So we don't
 * have to test for all 11 units gEDA/pcb allows in user dialogs.
 */
 if( aValue.EndsWith( wxT( "mm" ) ) )
 {
 aScalar *= 100000.0 / 25.4;
 }
 else if( aValue.EndsWith( wxT( "mil" ) ) )
 {
 aScalar *= 100.;
 }

 // This conversion reports failure on strings as simple as "1000", still
 // it returns the right result in &value. Thus, ignore the return value.
 aValue.ToCDouble(&value);
 if( value == std::numeric_limits<double>::max() ) // conversion really failed
 {
 THROW_IO_ERROR( wxString::Format( _( "Cannot convert '%s' to an integer." ),
 aValue.GetData() ) );
 return 0;
 }

 return KiROUND( value * aScalar );
}


class GPCB_FPL_CACHE_ITEM
{
public:
 GPCB_FPL_CACHE_ITEM( FOOTPRINT* aFootprint, const WX_FILENAME& aFileName );

 WX_FILENAME GetFileName() const { return m_filename; }
 FOOTPRINT* GetFootprint() const { return m_footprint.get(); }

private:
 WX_FILENAME m_filename; 
 std::unique_ptr<FOOTPRINT> m_footprint;
};


GPCB_FPL_CACHE_ITEM::GPCB_FPL_CACHE_ITEM( FOOTPRINT* aFootprint, const WX_FILENAME& aFileName ) :
 m_filename( aFileName ),
 m_footprint( aFootprint )
{
}


typedef boost::ptr_map< std::string, GPCB_FPL_CACHE_ITEM > FOOTPRINT_MAP;


class GPCB_FPL_CACHE
{
public:
 GPCB_FPL_CACHE( GPCB_PLUGIN* aOwner, const wxString& aLibraryPath );

 wxString GetPath() const { return m_lib_path.GetPath(); }
 bool IsWritable() const { return m_lib_path.IsOk() && m_lib_path.IsDirWritable(); }
 FOOTPRINT_MAP& GetFootprints() { return m_footprints; }

 // Most all functions in this class throw IO_ERROR exceptions. There are no
 // error codes nor user interface calls from here, nor in any PLUGIN.
 // Catch these exceptions higher up please.


 void Load();

 void Remove( const wxString& aFootprintName );

 static long long GetTimestamp( const wxString& aLibPath );

 bool IsModified();

private:
 FOOTPRINT* parseFOOTPRINT( LINE_READER* aLineReader );

 bool testFlags( const wxString& aFlag, long aMask, const wxChar* aName );

 void parseParameters( wxArrayString& aParameterList, LINE_READER* aLineReader );

 GPCB_PLUGIN* m_owner; 
 wxFileName m_lib_path; 
 FOOTPRINT_MAP m_footprints; 

 bool m_cache_dirty; 
 long long m_cache_timestamp; 
};


GPCB_FPL_CACHE::GPCB_FPL_CACHE( GPCB_PLUGIN* aOwner, const wxString& aLibraryPath )
{
 m_owner = aOwner;
 m_lib_path.SetPath( aLibraryPath );
 m_cache_timestamp = 0;
 m_cache_dirty = true;
}


void GPCB_FPL_CACHE::Load()
{
 m_cache_dirty = false;
 m_cache_timestamp = 0;

 // Note: like our .pretty footprint libraries, the gpcb footprint libraries are folders,
 // and the footprints are the .fp files inside this folder.

 wxDir dir( m_lib_path.GetPath() );

 if( !dir.IsOpened() )
 {
 THROW_IO_ERROR( wxString::Format( _( "Footprint library '%s' not found." ),
 m_lib_path.GetPath().GetData() ) );
 }

 wxString fullName;
 wxString fileSpec = wxT( "*." ) + GedaPcbFootprintLibFileExtension;

 // wxFileName construction is egregiously slow. Construct it once and just swap out
 // the filename thereafter.
 WX_FILENAME fn( m_lib_path.GetPath(), wxT( "dummyName" ) );

 if( !dir.GetFirst( &fullName, fileSpec ) )
 return;

 wxString cacheErrorMsg;

 do
 {
 fn.SetFullName( fullName );

 // Queue I/O errors so only files that fail to parse don't get loaded.
 try
 {
 // reader now owns fp, will close on exception or return
 FILE_LINE_READER reader( fn.GetFullPath() );
 std::string name = TO_UTF8( fn.GetName() );
 FOOTPRINT* footprint = parseFOOTPRINT( &reader );

 // The footprint name is the file name without the extension.
 footprint->SetFPID( LIB_ID( wxEmptyString, fn.GetName() ) );
 m_footprints.insert( name, new GPCB_FPL_CACHE_ITEM( footprint, fn ) );
 }
 catch( const IO_ERROR& ioe )
 {
 if( !cacheErrorMsg.IsEmpty() )
 cacheErrorMsg += "\n\n";

 cacheErrorMsg += ioe.What();
 }
 } while( dir.GetNext( &fullName ) );

 if( !cacheErrorMsg.IsEmpty() )
 THROW_IO_ERROR( cacheErrorMsg );
}


void GPCB_FPL_CACHE::Remove( const wxString& aFootprintName )
{
 std::string footprintName = TO_UTF8( aFootprintName );

 FOOTPRINT_MAP::const_iterator it = m_footprints.find( footprintName );

 if( it == m_footprints.end() )
 {
 THROW_IO_ERROR( wxString::Format( _( "Library '%s' has no footprint '%s'." ),
 m_lib_path.GetPath().GetData(),
 aFootprintName.GetData() ) );
 }

 // Remove the footprint from the cache and delete the footprint file from the library.
 wxString fullPath = it->second->GetFileName().GetFullPath();
 m_footprints.erase( footprintName );
 wxRemoveFile( fullPath );
}


bool GPCB_FPL_CACHE::IsModified()
{
 m_cache_dirty = m_cache_dirty || GetTimestamp( m_lib_path.GetFullPath() ) != m_cache_timestamp;

 return m_cache_dirty;
}


long long GPCB_FPL_CACHE::GetTimestamp( const wxString& aLibPath )
{
 wxString fileSpec = wxT( "*." ) + GedaPcbFootprintLibFileExtension;

 return TimestampDir( aLibPath, fileSpec );
}


FOOTPRINT* GPCB_FPL_CACHE::parseFOOTPRINT( LINE_READER* aLineReader )
{
 #define TEXT_DEFAULT_SIZE ( 40*IU_PER_MILS )
 #define OLD_GPCB_UNIT_CONV IU_PER_MILS

 // Old version unit = 1 mil, so conv_unit is 10 or 0.1
 #define NEW_GPCB_UNIT_CONV ( 0.01*IU_PER_MILS )

 int paramCnt;

 // GPCB unit = 0.01 mils and Pcbnew 0.1.
 double conv_unit = NEW_GPCB_UNIT_CONV;
 wxPoint textPos;
 wxString msg;
 wxArrayString parameters;
 std::unique_ptr<FOOTPRINT> footprint = std::make_unique<FOOTPRINT>( nullptr );

 if( aLineReader->ReadLine() == nullptr )
 {
 msg = aLineReader->GetSource() + ": empty file";
 THROW_IO_ERROR( msg );
 }

 parameters.Clear();
 parseParameters( parameters, aLineReader );
 paramCnt = parameters.GetCount();

 /* From the Geda PCB documentation, valid Element definitions:
 * Element [SFlags "Desc" "Name" "Value" MX MY TX TY TDir TScale TSFlags]
 * Element (NFlags "Desc" "Name" "Value" MX MY TX TY TDir TScale TNFlags)
 * Element (NFlags "Desc" "Name" "Value" TX TY TDir TScale TNFlags)
 * Element (NFlags "Desc" "Name" TX TY TDir TScale TNFlags)
 * Element ("Desc" "Name" TX TY TDir TScale TNFlags)
 */

 if( parameters[0].CmpNoCase( wxT( "Element" ) ) != 0 )
 {
 msg.Printf( _( "Unknown token '%s'" ), parameters[0] );
 THROW_PARSE_ERROR( msg, aLineReader->GetSource(), (const char *)aLineReader,
 aLineReader->LineNumber(), 0 );
 }

 if( paramCnt < 10 || paramCnt > 14 )
 {
 msg.Printf( _( "Element token contains %d parameters." ), paramCnt );
 THROW_PARSE_ERROR( msg, aLineReader->GetSource(), (const char *)aLineReader,
 aLineReader->LineNumber(), 0 );
 }

 // Test symbol after "Element": if [ units = 0.01 mils, and if ( units = 1 mil
 if( parameters[1] == wxT( "(" ) )
 conv_unit = OLD_GPCB_UNIT_CONV;

 if( paramCnt > 10 )
 {
 footprint->SetDescription( parameters[3] );
 footprint->SetReference( parameters[4] );
 }
 else
 {
 footprint->SetDescription( parameters[2] );
 footprint->SetReference( parameters[3] );
 }

 // Read value
 if( paramCnt > 10 )
 footprint->SetValue( parameters[5] );

 // With gEDA/pcb, value is meaningful after instantiation, only, so it's
 // often empty in bare footprints.
 if( footprint->Value().GetText().IsEmpty() )
 footprint->Value().SetText( wxT( "Val**" ) );


 if( paramCnt == 14 )
 {
 textPos = wxPoint( parseInt( parameters[8], conv_unit ),
 parseInt( parameters[9], conv_unit ) );
 }
 else
 {
 textPos = wxPoint( parseInt( parameters[6], conv_unit ),
 parseInt( parameters[7], conv_unit ) );
 }

 int orientation = parseInt( parameters[paramCnt-4], 1.0 );
 footprint->Reference().SetTextAngle(( orientation % 2) ? 900 : 0 );

 // Calculate size: default height is 40 mils, width 30 mil.
 // real size is: default * ibuf[idx+3] / 100 (size in gpcb is given in percent of default size
 int thsize = parseInt( parameters[paramCnt-3], TEXT_DEFAULT_SIZE ) / 100;
 thsize = std::max( (int)( 5 * IU_PER_MILS ), thsize ); // Ensure a minimal size = 5 mils
 int twsize = thsize * 30 / 40;
 int thickness = thsize / 8;

 // gEDA/pcb aligns top/left, not pcbnew's default, center/center.
 // Compensate for this by shifting the insertion point instead of the
 // alignment, because alignment isn't changeable in the GUI.
 textPos.x = textPos.x + twsize * footprint->GetReference().Len() / 2;
 textPos.y += thsize / 2;

 // gEDA/pcb draws a bit too low/left, while pcbnew draws a bit too
 // high/right. Compensate for similar appearance.
 textPos.x -= thsize / 10;
 textPos.y += thsize / 2;

 footprint->Reference().SetTextPos( textPos );
 footprint->Reference().SetPos0( textPos );
 footprint->Reference().SetTextSize( wxSize( twsize, thsize ) );
 footprint->Reference().SetTextThickness( thickness );

 // gEDA/pcb shows only one of value/reference/description at a time. Which
 // one is selectable by a global menu setting. pcbnew needs reference as
 // well as value visible, so place the value right below the reference.
 footprint->Value().SetTextAngle( footprint->Reference().GetTextAngle() );
 footprint->Value().SetTextSize( footprint->Reference().GetTextSize() );
 footprint->Value().SetTextThickness( footprint->Reference().GetTextThickness() );
 textPos.y += thsize * 13 / 10; // 130% line height
 footprint->Value().SetTextPos( textPos );
 footprint->Value().SetPos0( textPos );

 while( aLineReader->ReadLine() )
 {
 parameters.Clear();
 parseParameters( parameters, aLineReader );

 if( parameters.IsEmpty() || parameters[0] == wxT( "(" ) )
 continue;

 if( parameters[0] == wxT( ")" ) )
 break;

 paramCnt = parameters.GetCount();

 // Test units value for a string line param (more than 3 parameters : ident [ xx ] )
 if( paramCnt > 3 )
 {
 if( parameters[1] == wxT( "(" ) )
 conv_unit = OLD_GPCB_UNIT_CONV;
 else
 conv_unit = NEW_GPCB_UNIT_CONV;
 }

 wxLogTrace( traceGedaPcbPlugin, wxT( "%s parameter count = %d." ),
 parameters[0], paramCnt );

 // Parse a line with format: ElementLine [X1 Y1 X2 Y2 Thickness]
 if( parameters[0].CmpNoCase( wxT( "ElementLine" ) ) == 0 )
 {
 if( paramCnt != 8 )
 {
 msg.Printf( wxT( "ElementLine token contains %d parameters." ), paramCnt );
 THROW_PARSE_ERROR( msg, aLineReader->GetSource(), (const char *)aLineReader,
 aLineReader->LineNumber(), 0 );
 }

 FP_SHAPE* shape = new FP_SHAPE( footprint.get(), SHAPE_T::SEGMENT );
 shape->SetLayer( F_SilkS );
 shape->SetStart0( wxPoint( parseInt( parameters[2], conv_unit ),
 parseInt( parameters[3], conv_unit ) ) );
 shape->SetEnd0( wxPoint( parseInt( parameters[4], conv_unit ),
 parseInt( parameters[5], conv_unit ) ) );
 shape->SetWidth( parseInt( parameters[6], conv_unit ) );
 shape->SetDrawCoord();
 footprint->Add( shape );
 continue;
 }

 // Parse an arc with format: ElementArc [X Y Width Height StartAngle DeltaAngle Thickness]
 if( parameters[0].CmpNoCase( wxT( "ElementArc" ) ) == 0 )
 {
 if( paramCnt != 10 )
 {
 msg.Printf( wxT( "ElementArc token contains %d parameters." ), paramCnt );
 THROW_PARSE_ERROR( msg, aLineReader->GetSource(), (const char *)aLineReader,
 aLineReader->LineNumber(), 0 );
 }

 // Pcbnew does know ellipse so we must have Width = Height
 FP_SHAPE* shape = new FP_SHAPE( footprint.get(), SHAPE_T::ARC );
 shape->SetLayer( F_SilkS );
 footprint->Add( shape );

 // for and arc: ibuf[3] = ibuf[4]. Pcbnew does not know ellipses
 int radius = ( parseInt( parameters[4], conv_unit ) +
  parseInt( parameters[5], conv_unit ) ) / 2;

 wxPoint centre( parseInt( parameters[2], conv_unit ),
 parseInt( parameters[3], conv_unit ) );

 shape->SetCenter0( centre );

 // Pcbnew start angles are inverted and 180 degrees from Geda PCB angles.
 double start_angle = parseInt( parameters[6], -10.0 ) + 1800.0;

 // Pcbnew delta angle direction is the opposite of Geda PCB delta angles.
 double sweep_angle = parseInt( parameters[7], -10.0 );

 // Geda PCB does not support circles.
 if( sweep_angle == -3600.0 )
 shape->SetShape( SHAPE_T::CIRCLE );

 // Calculate start point coordinate of arc
 wxPoint arcStart( radius, 0 );
 RotatePoint( &arcStart, -start_angle );
 shape->SetStart0( arcStart + centre );

 // Angle value is clockwise in gpcb and Pcbnew.
 shape->SetArcAngleAndEnd0( sweep_angle );

 shape->SetWidth( parseInt( parameters[8], conv_unit ) );
 shape->SetDrawCoord();
 continue;
 }

 // Parse a Pad with no hole with format:
 // Pad [rX1 rY1 rX2 rY2 Thickness Clearance Mask "Name" "Number" SFlags]
 // Pad (rX1 rY1 rX2 rY2 Thickness Clearance Mask "Name" "Number" NFlags)
 // Pad (aX1 aY1 aX2 aY2 Thickness "Name" "Number" NFlags)
 // Pad (aX1 aY1 aX2 aY2 Thickness "Name" NFlags)
 if( parameters[0].CmpNoCase( wxT( "Pad" ) ) == 0 )
 {
 if( paramCnt < 10 || paramCnt > 13 )
 {
 msg.Printf( wxT( "Pad token contains %d parameters." ), paramCnt );
 THROW_PARSE_ERROR( msg, aLineReader->GetSource(), (const char *)aLineReader,
 aLineReader->LineNumber(), 0 );
 }

 PAD* pad = new PAD( footprint.get() );

 static const LSET pad_front( 3, F_Cu, F_Mask, F_Paste );
 static const LSET pad_back( 3, B_Cu, B_Mask, B_Paste );

 pad->SetShape( PAD_SHAPE::RECT );
 pad->SetAttribute( PAD_ATTRIB::SMD );
 pad->SetLayerSet( pad_front );

 if( testFlags( parameters[paramCnt-2], 0x0080, wxT( "onsolder" ) ) )
 pad->SetLayerSet( pad_back );

 // Set the pad name:
 // Pcbnew pad name is used for electrical connection calculations.
 // Accordingly it should be mapped to gEDA's pin/pad number,
 // which is used for the same purpose.
 // gEDA also features a pin/pad "name", which is an arbitrary string
 // and set to the pin name of the netlist on instantiation. Many gEDA
 // bare footprints use identical strings for name and number, so this
 // can be a bit confusing.
 pad->SetNumber( parameters[paramCnt-3] );

 int x1 = parseInt( parameters[2], conv_unit );
 int x2 = parseInt( parameters[4], conv_unit );
 int y1 = parseInt( parameters[3], conv_unit );
 int y2 = parseInt( parameters[5], conv_unit );
 int width = parseInt( parameters[6], conv_unit );
 wxPoint delta( x2 - x1, y2 - y1 );
 double angle = atan2( (double)delta.y, (double)delta.x );

 // Get the pad clearance and the solder mask clearance.
 if( paramCnt == 13 )
 {
 int clearance = parseInt( parameters[7], conv_unit );
 // One of gEDA's oddities is that clearance between pad and polygon
 // is given as the gap on both sides of the pad together, so for
 // KiCad it has to halfed.
 pad->SetLocalClearance( clearance / 2 );

 // In GEDA, the mask value is the size of the hole in this
 // solder mask. In Pcbnew, it is a margin, therefore the distance
 // between the copper and the mask
 int maskMargin = parseInt( parameters[8], conv_unit );
 maskMargin = ( maskMargin - width ) / 2;
 pad->SetLocalSolderMaskMargin( maskMargin );
 }

 // Negate angle (due to Y reversed axis) and convert it to internal units
 angle = - RAD2DECIDEG( angle );
 pad->SetOrientation( KiROUND( angle ) );

 wxPoint padPos( (x1 + x2) / 2, (y1 + y2) / 2 );

 pad->SetSize( wxSize( KiROUND( EuclideanNorm( delta ) ) + width, width ) );

 // Set the relative position before adjusting the absolute position
 pad->SetPos0( padPos );
 padPos += footprint->GetPosition();
 pad->SetPosition( padPos );

 if( !testFlags( parameters[paramCnt-2], 0x0100, wxT( "square" ) ) )
 {
 if( pad->GetSize().x == pad->GetSize().y )
 pad->SetShape( PAD_SHAPE::CIRCLE );
 else
 pad->SetShape( PAD_SHAPE::OVAL );
 }

 footprint->Add( pad );
 continue;
 }

 // Parse a Pin with through hole with format:
 // Pin [rX rY Thickness Clearance Mask Drill "Name" "Number" SFlags]
 // Pin (rX rY Thickness Clearance Mask Drill "Name" "Number" NFlags)
 // Pin (aX aY Thickness Drill "Name" "Number" NFlags)
 // Pin (aX aY Thickness Drill "Name" NFlags)
 // Pin (aX aY Thickness "Name" NFlags)
 if( parameters[0].CmpNoCase( wxT( "Pin" ) ) == 0 )
 {
 if( paramCnt < 8 || paramCnt > 12 )
 {
 msg.Printf( wxT( "Pin token contains %d parameters." ), paramCnt );
 THROW_PARSE_ERROR( msg, aLineReader->GetSource(), (const char *)aLineReader,
 aLineReader->LineNumber(), 0 );
 }

 PAD* pad = new PAD( footprint.get() );

 pad->SetShape( PAD_SHAPE::CIRCLE );

 static const LSET pad_set = LSET::AllCuMask() | LSET( 3, F_SilkS, F_Mask, B_Mask );

 pad->SetLayerSet( pad_set );

 if( testFlags( parameters[paramCnt-2], 0x0100, wxT( "square" ) ) )
 pad->SetShape( PAD_SHAPE::RECT );

 // Set the pad name:
 // Pcbnew pad name is used for electrical connection calculations.
 // Accordingly it should be mapped to gEDA's pin/pad number,
 // which is used for the same purpose.
 pad->SetNumber( parameters[paramCnt-3] );

 wxPoint padPos( parseInt( parameters[2], conv_unit ),
 parseInt( parameters[3], conv_unit ) );

 int padSize = parseInt( parameters[4], conv_unit );

 pad->SetSize( wxSize( padSize, padSize ) );

 int drillSize = 0;

 // Get the pad clearance, solder mask clearance, and drill size.
 if( paramCnt == 12 )
 {
 int clearance = parseInt( parameters[5], conv_unit );
 // One of gEDA's oddities is that clearance between pad and polygon
 // is given as the gap on both sides of the pad together, so for
 // KiCad it has to halfed.
 pad->SetLocalClearance( clearance / 2 );

 // In GEDA, the mask value is the size of the hole in this
 // solder mask. In Pcbnew, it is a margin, therefore the distance
 // between the copper and the mask
 int maskMargin = parseInt( parameters[6], conv_unit );
 maskMargin = ( maskMargin - padSize ) / 2;
 pad->SetLocalSolderMaskMargin( maskMargin );

 drillSize = parseInt( parameters[7], conv_unit );
 }
 else
 {
 drillSize = parseInt( parameters[5], conv_unit );
 }

 pad->SetDrillSize( wxSize( drillSize, drillSize ) );

 // Set the relative position before adjusting the absolute position
 pad->SetPos0( padPos );
 padPos += footprint->GetPosition();
 pad->SetPosition( padPos );

 if( pad->GetShape() == PAD_SHAPE::CIRCLE && pad->GetSize().x != pad->GetSize().y )
 pad->SetShape( PAD_SHAPE::OVAL );

 footprint->Add( pad );
 continue;
 }
 }

 return footprint.release();
}


void GPCB_FPL_CACHE::parseParameters( wxArrayString& aParameterList, LINE_READER* aLineReader )
{
 char key;
 wxString tmp;
 char* line = aLineReader->Line();

 // Last line already ready in main parser loop.
 while( *line != 0 )
 {
 key = *line;
 line++;

 switch( key )
 {
 case '[':
 case '(':
 if( !tmp.IsEmpty() )
 {
 aParameterList.Add( tmp );
 tmp.Clear();
 }

 tmp.Append( key );
 aParameterList.Add( tmp );
 tmp.Clear();

 // Opening delimiter "(" after Element statement. Any other occurrence is part
 // of a keyword definition.
 if( aParameterList.GetCount() == 1 )
 {
 wxLogTrace( traceGedaPcbPlugin, dump( aParameterList ) );
 return;
 }

 break;

 case ']':
 case ')':
 if( !tmp.IsEmpty() )
 {
 aParameterList.Add( tmp );
 tmp.Clear();
 }

 tmp.Append( key );
 aParameterList.Add( tmp );
 wxLogTrace( traceGedaPcbPlugin, dump( aParameterList ) );
 return;

 case '\n':
 case '\r':
 // Element descriptions can span multiple lines.
 line = aLineReader->ReadLine();
 KI_FALLTHROUGH;

 case '\t':
 case ' ':
 if( !tmp.IsEmpty() )
 {
 aParameterList.Add( tmp );
 tmp.Clear();
 }

 break;

 case '"':
 // Handle empty quotes.
 if( *line == '"' )
 {
 line++;
 tmp.Clear();
 aParameterList.Add( wxEmptyString );
 break;
 }

 while( *line != 0 )
 {
 key = *line;
 line++;

 if( key == '"' )
 {
 aParameterList.Add( tmp );
 tmp.Clear();
 break;
 }
 else
 {
 tmp.Append( key );
 }
 }

 break;

 case '#':
 line = aLineReader->ReadLine();
 break;

 default:
 tmp.Append( key );
 break;
 }
 }
}


bool GPCB_FPL_CACHE::testFlags( const wxString& aFlag, long aMask, const wxChar* aName )
{
 wxString number;

 if( aFlag.StartsWith( wxT( "0x" ), &number ) || aFlag.StartsWith( wxT( "0X" ), &number ) )
 {
 long lflags;

 if( number.ToLong( &lflags, 16 ) && ( lflags & aMask ) )
 return true;
 }
 else if( aFlag.Contains( aName ) )
 {
 return true;
 }

 return false;
}


GPCB_PLUGIN::GPCB_PLUGIN() :
 m_cache( nullptr ),
 m_ctl( 0 )
{
 m_reader = nullptr;
 init( nullptr );
}


GPCB_PLUGIN::GPCB_PLUGIN( int aControlFlags ) :
 m_cache( nullptr ),
 m_ctl( aControlFlags )
{
 m_reader = nullptr;
 init( nullptr );
}


GPCB_PLUGIN::~GPCB_PLUGIN()
{
 delete m_cache;
}


void GPCB_PLUGIN::init( const PROPERTIES* aProperties )
{
 m_props = aProperties;
}


void GPCB_PLUGIN::validateCache( const wxString& aLibraryPath, bool checkModified )
{
 if( !m_cache || ( checkModified && m_cache->IsModified() ) )
 {
 // a spectacular episode in memory management:
 delete m_cache;
 m_cache = new GPCB_FPL_CACHE( this, aLibraryPath );
 m_cache->Load();
 }
}


void GPCB_PLUGIN::FootprintEnumerate( wxArrayString& aFootprintNames, const wxString& aLibraryPath,
 bool aBestEfforts, const PROPERTIES* aProperties )
{
 LOCALE_IO toggle; // toggles on, then off, the C locale.
 wxDir dir( aLibraryPath );
 wxString errorMsg;

 if( !dir.IsOpened() )
 {
 if( aBestEfforts )
 return;
 else
 {
 THROW_IO_ERROR( wxString::Format( _( "Footprint library '%s' not found." ),
 aLibraryPath ) );
 }
 }

 init( aProperties );

 try
 {
 validateCache( aLibraryPath );
 }
 catch( const IO_ERROR& ioe )
 {
 errorMsg = ioe.What();
 }

 // Some of the files may have been parsed correctly so we want to add the valid files to
 // the library.

 for( const auto& footprint : m_cache->GetFootprints() )
 aFootprintNames.Add( FROM_UTF8( footprint.first.c_str() ) );

 if( !errorMsg.IsEmpty() && !aBestEfforts )
 THROW_IO_ERROR( errorMsg );
}


const FOOTPRINT* GPCB_PLUGIN::getFootprint( const wxString& aLibraryPath,
 const wxString& aFootprintName,
 const PROPERTIES* aProperties,
 bool checkModified )
{
 LOCALE_IO toggle; // toggles on, then off, the C locale.

 init( aProperties );

 validateCache( aLibraryPath, checkModified );

 const FOOTPRINT_MAP& mods = m_cache->GetFootprints();

 FOOTPRINT_MAP::const_iterator it = mods.find( TO_UTF8( aFootprintName ) );

 if( it == mods.end() )
 return nullptr;

 return it->second->GetFootprint();
}


const FOOTPRINT* GPCB_PLUGIN::GetEnumeratedFootprint( const wxString& aLibraryPath,
 const wxString& aFootprintName,
 const PROPERTIES* aProperties )
{
 return getFootprint( aLibraryPath, aFootprintName, aProperties, false );
}


FOOTPRINT* GPCB_PLUGIN::FootprintLoad( const wxString& aLibraryPath,
 const wxString& aFootprintName,
 bool aKeepUUID,
 const PROPERTIES* aProperties )
{
 const FOOTPRINT* footprint = getFootprint( aLibraryPath, aFootprintName, aProperties, true );

 if( footprint )
 {
 FOOTPRINT* copy = (FOOTPRINT*) footprint->Duplicate();
 copy->SetParent( nullptr );
 return copy;
 }

 return nullptr;
}


void GPCB_PLUGIN::FootprintDelete( const wxString& aLibraryPath, const wxString& aFootprintName,
 const PROPERTIES* aProperties )
{
 LOCALE_IO toggle; // toggles on, then off, the C locale.

 init( aProperties );

 validateCache( aLibraryPath );

 if( !m_cache->IsWritable() )
 {
 THROW_IO_ERROR( wxString::Format( _( "Library '%s' is read only." ),
 aLibraryPath.GetData() ) );
 }

 m_cache->Remove( aFootprintName );
}


bool GPCB_PLUGIN::FootprintLibDelete( const wxString& aLibraryPath, const PROPERTIES* aProperties )
{
 wxFileName fn;
 fn.SetPath( aLibraryPath );

 // Return if there is no library path to delete.
 if( !fn.DirExists() )
 return false;

 if( !fn.IsDirWritable() )
 {
 THROW_IO_ERROR( wxString::Format( _( "Insufficient permissions to delete folder '%s'." ),
 aLibraryPath.GetData() ) );
 }

 wxDir dir( aLibraryPath );

 if( dir.HasSubDirs() )
 {
 THROW_IO_ERROR( wxString::Format( _( "Library folder '%s' has unexpected sub-folders." ),
 aLibraryPath.GetData() ) );
 }

 // All the footprint files must be deleted before the directory can be deleted.
 if( dir.HasFiles() )
 {
 unsigned i;
 wxFileName tmp;
 wxArrayString files;

 wxDir::GetAllFiles( aLibraryPath, &files );

 for( i = 0; i < files.GetCount(); i++ )
 {
 tmp = files[i];

 if( tmp.GetExt() != KiCadFootprintFileExtension )
 {
 THROW_IO_ERROR( wxString::Format( _( "Unexpected file '%s' found in library '%s'." ),
 files[i].GetData(),
 aLibraryPath.GetData() ) );
 }
 }

 for( i = 0; i < files.GetCount(); i++ )
 {
 wxRemoveFile( files[i] );
 }
 }

 wxLogTrace( traceGedaPcbPlugin, wxT( "Removing footprint library '%s'" ),
 aLibraryPath.GetData() );

 // Some of the more elaborate wxRemoveFile() crap puts up its own wxLog dialog
 // we don't want that. we want bare metal portability with no UI here.
 if( !wxRmdir( aLibraryPath ) )
 {
 THROW_IO_ERROR( wxString::Format( _( "Footprint library '%s' cannot be deleted." ),
 aLibraryPath.GetData() ) );
 }

 // For some reason removing a directory in Windows is not immediately updated. This delay
 // prevents an error when attempting to immediately recreate the same directory when over
 // writing an existing library.
#ifdef __WINDOWS__
 wxMilliSleep( 250L );
#endif

 if( m_cache && m_cache->GetPath() == aLibraryPath )
 {
 delete m_cache;
 m_cache = nullptr;
 }

 return true;
}


long long GPCB_PLUGIN::GetLibraryTimestamp( const wxString& aLibraryPath ) const
{
 return GPCB_FPL_CACHE::GetTimestamp( aLibraryPath );
}


bool GPCB_PLUGIN::IsFootprintLibWritable( const wxString& aLibraryPath )
{
 LOCALE_IO toggle;

 init( nullptr );

 validateCache( aLibraryPath );

 return m_cache->IsWritable();
}