eagle_parser.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 SoftPLC Corporation, Dick Hollenbeck <[email protected]>
 * Copyright (C) 2012-2021 KiCad Developers, see AUTHORS.txt for contributors.
 * Copyright (C) 2017 CERN.
 *
 * @author Alejandro García Montoro <[email protected]>
 *
 * 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 <plugins/eagle/eagle_parser.h>
 
#include <string_utils.h>
#include <richio.h>
#include <wx/log.h>
 
#include <functional>
#include <cstdio>
 
constexpr auto DEFAULT_ALIGNMENT = ETEXT::BOTTOM_LEFT;
 
 
wxString escapeName( const wxString& aNetName )
{
 wxString ret( aNetName );
 
 ret.Replace( "!", "~" );
 
 return ConvertToNewOverbarNotation( ret );
}
 
 
template<> template<>
OPTIONAL_XML_ATTRIBUTE<wxString>::OPTIONAL_XML_ATTRIBUTE( wxString aData )
{
 m_isAvailable = !aData.IsEmpty();
 
 if( m_isAvailable )
 Set( aData );
}
 
 
ECOORD::ECOORD( const wxString& aValue, enum ECOORD::EAGLE_UNIT aUnit )
{
 // This array is used to adjust the fraction part value basing on the number of digits
 // in the fraction.
 constexpr int DIVIDERS[] = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000 };
 constexpr unsigned int DIVIDERS_MAX_IDX = sizeof( DIVIDERS ) / sizeof( DIVIDERS[0] ) - 1;
 
 int integer, fraction, pre_fraction, post_fraction;
 
 // The following check is needed to handle correctly negative fractions where the integer
 // part == 0.
 bool negative = ( aValue[0] == '-' );
 
 // %n is used to find out how many digits contains the fraction part, e.g. 0.001 contains 3
 // digits.
 int ret = sscanf( aValue.c_str(), "%d.%n%d%n", &integer, &pre_fraction, &fraction,
 &post_fraction );
 
 if( ret == 0 )
 throw XML_PARSER_ERROR( "Invalid coordinate" );
 
 // process the integer part
 value = ConvertToNm( integer, aUnit );
 
 // process the fraction part
 if( ret == 2 )
 {
 int digits = post_fraction - pre_fraction;
 
 // adjust the number of digits if necessary as we cannot handle anything smaller than
 // nanometers (rounding).
 if( (unsigned) digits > DIVIDERS_MAX_IDX )
 {
 int diff = digits - DIVIDERS_MAX_IDX;
 digits = DIVIDERS_MAX_IDX;
 fraction /= DIVIDERS[diff];
 }
 
 int frac_value = ConvertToNm( fraction, aUnit ) / DIVIDERS[digits];
 
 // keep the sign in mind
 value = negative ? value - frac_value : value + frac_value;
 }
}
 
 
long long int ECOORD::ConvertToNm( int aValue, enum EAGLE_UNIT aUnit )
{
 long long int ret;
 
 switch( aUnit )
 {
 default:
 case EU_NM: ret = aValue; break;
 case EU_MM: ret = (long long) aValue * 1000000; break;
 case EU_INCH: ret = (long long) aValue * 25400000; break;
 case EU_MIL: ret = (long long) aValue * 25400; break;
 }
 
 if( ( ret > 0 ) != ( aValue > 0 ) )
 wxLogError( _( "Invalid size %lld: too large" ), aValue );
 
 return ret;
}
 
 
// Template specializations below parse wxString to the used types:
// - wxString (preferred)
// - string
// - double
// - int
// - bool
// - EROT
// - ECOORD
 
template <>
wxString Convert<wxString>( const wxString& aValue )
{
 return aValue;
}
 
 
template <>
std::string Convert<std::string>( const wxString& aValue )
{
 return std::string( aValue.ToUTF8() );
}
 
 
template <>
double Convert<double>( const wxString& aValue )
{
 double value;
 
 if( aValue.ToCDouble( &value ) )
 return value;
 else
 throw XML_PARSER_ERROR( "Conversion to double failed. Original value: '" +
 aValue.ToStdString() + "'." );
}
 
 
template <>
int Convert<int>( const wxString& aValue )
{
 if( aValue.IsEmpty() )
 throw XML_PARSER_ERROR( "Conversion to int failed. Original value is empty." );
 
 return wxAtoi( aValue );
}
 
 
template <>
bool Convert<bool>( const wxString& aValue )
{
 if( aValue != "yes" && aValue != "no" )
 throw XML_PARSER_ERROR( "Conversion to bool failed. Original value, '" +
 aValue.ToStdString() +
 "', is neither 'yes' nor 'no'." );
 
 return aValue == "yes";
}
 
 
template<>
EROT Convert<EROT>( const wxString& aRot )
{
 EROT value;
 
 value.spin = aRot.find( 'S' ) != aRot.npos;
 value.mirror = aRot.find( 'M' ) != aRot.npos;
 value.degrees = strtod( aRot.c_str()
 + 1 // skip leading 'R'
 + int( value.spin ) // skip optional leading 'S'
 + int( value.mirror ), // skip optional leading 'M'
 nullptr );
 
 return value;
}
 
 
template<>
ECOORD Convert<ECOORD>( const wxString& aCoord )
{
 // Eagle uses millimeters as the default unit
 return ECOORD( aCoord, ECOORD::EAGLE_UNIT::EU_MM );
}
 
 
template<typename T>
T parseRequiredAttribute( wxXmlNode* aNode, const wxString& aAttribute )
{
 wxString value;
 
 if( aNode->GetAttribute( aAttribute, &value ) )
 return Convert<T>( value );
 else
 throw XML_PARSER_ERROR( "The required attribute " + aAttribute + " is missing." );
}
 
 
template<typename T>
OPTIONAL_XML_ATTRIBUTE<T> parseOptionalAttribute( wxXmlNode* aNode, const wxString& aAttribute )
{
 return OPTIONAL_XML_ATTRIBUTE<T>( aNode->GetAttribute( aAttribute ) );
}
 
 
NODE_MAP MapChildren( wxXmlNode* aCurrentNode )
{
 // Map node_name -> node_pointer
 NODE_MAP nodesMap;
 
 // Loop through all children mapping them in nodesMap
 if( aCurrentNode )
 aCurrentNode = aCurrentNode->GetChildren();
 
 while( aCurrentNode )
 {
 // Create a new pair in the map
 // key: current node name
 // value: current node pointer
 nodesMap[aCurrentNode->GetName()] = aCurrentNode;
 
 // Get next child
 aCurrentNode = aCurrentNode->GetNext();
 }
 
 return nodesMap;
}
 
 
VECTOR2I ConvertArcCenter( const VECTOR2I& aStart, const VECTOR2I& aEnd, double aAngle )
{
 // Eagle give us start and end.
 // S_ARC wants start to give the center, and end to give the start.
 double dx = aEnd.x - aStart.x, dy = aEnd.y - aStart.y;
 VECTOR2I mid = ( aStart + aEnd ) / 2;
 
 double dlen = sqrt( dx*dx + dy*dy );
 
 if( !std::isnormal( dlen ) || !std::isnormal( aAngle ) )
 {
 THROW_IO_ERROR( wxString::Format( _( "Invalid Arc with radius %f and angle %f" ),
 dlen,
 aAngle ) );
 }
 
 double dist = dlen / ( 2 * tan( DEG2RAD( aAngle ) / 2 ) );
 
 VECTOR2I center(
 mid.x + dist * ( dy / dlen ),
 mid.y - dist * ( dx / dlen )
 );
 
 return center;
}
 
 
static int parseAlignment( const wxString& aAlignment )
{
 // (bottom-left | bottom-center | bottom-right | center-left |
 // center | center-right | top-left | top-center | top-right)
 if( aAlignment == "center" )
 return ETEXT::CENTER;
 else if( aAlignment == "center-right" )
 return ETEXT::CENTER_RIGHT;
 else if( aAlignment == "top-left" )
 return ETEXT::TOP_LEFT;
 else if( aAlignment == "top-center" )
 return ETEXT::TOP_CENTER;
 else if( aAlignment == "top-right" )
 return ETEXT::TOP_RIGHT;
 else if( aAlignment == "bottom-left" )
 return ETEXT::BOTTOM_LEFT;
 else if( aAlignment == "bottom-center" )
 return ETEXT::BOTTOM_CENTER;
 else if( aAlignment == "bottom-right" )
 return ETEXT::BOTTOM_RIGHT;
 else if( aAlignment == "center-left" )
 return ETEXT::CENTER_LEFT;
 
 return DEFAULT_ALIGNMENT;
}
 
 
EWIRE::EWIRE( wxXmlNode* aWire )
{
 /*
 <!ELEMENT wire EMPTY>
 <!ATTLIST wire
 x1 %Coord; #REQUIRED
 y1 %Coord; #REQUIRED
 x2 %Coord; #REQUIRED
 y2 %Coord; #REQUIRED
 width %Dimension; #REQUIRED
 layer %Layer; #REQUIRED
 extent %Extent; #IMPLIED -- only applicable for airwires --
 style %WireStyle; "continuous"
 curve %WireCurve; "0"
 cap %WireCap; "round" -- only applicable if 'curve' is not zero --
 >
 */
 
 x1 = parseRequiredAttribute<ECOORD>( aWire, "x1" );
 y1 = parseRequiredAttribute<ECOORD>( aWire, "y1" );
 x2 = parseRequiredAttribute<ECOORD>( aWire, "x2" );
 y2 = parseRequiredAttribute<ECOORD>( aWire, "y2" );
 width = parseRequiredAttribute<ECOORD>( aWire, "width" );
 layer = parseRequiredAttribute<int>( aWire, "layer" );
 curve = parseOptionalAttribute<double>( aWire, "curve" );
 
 opt_wxString s = parseOptionalAttribute<wxString>( aWire, "style" );
 
 if( s == "continuous" )
 style = EWIRE::CONTINUOUS;
 else if( s == "longdash" )
 style = EWIRE::LONGDASH;
 else if( s == "shortdash" )
 style = EWIRE::SHORTDASH;
 else if( s == "dashdot" )
 style = EWIRE::DASHDOT;
 
 s = parseOptionalAttribute<wxString>( aWire, "cap" );
 
 if( s == "round" )
 cap = EWIRE::ROUND;
 else if( s == "flat" )
 cap = EWIRE::FLAT;
}
 
 
EJUNCTION::EJUNCTION( wxXmlNode* aJunction )
{
 /*
 <!ELEMENT junction EMPTY>
 <!ATTLIST junction
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 >
 */
 
 x = parseRequiredAttribute<ECOORD>( aJunction, "x" );
 y = parseRequiredAttribute<ECOORD>( aJunction, "y" );
}
 
 
ELABEL::ELABEL( wxXmlNode* aLabel, const wxString& aNetName )
{
 /*
 <!ELEMENT label EMPTY>
 <!ATTLIST label
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 size %Dimension; #REQUIRED
 layer %Layer; #REQUIRED
 font %TextFont; "proportional"
 ratio %Int; "8"
 rot %Rotation; "R0"
 xref %Bool; "no"
 >
 */
 
 x = parseRequiredAttribute<ECOORD>( aLabel, "x" );
 y = parseRequiredAttribute<ECOORD>( aLabel, "y" );
 size = parseRequiredAttribute<ECOORD>( aLabel, "size" );
 layer = parseRequiredAttribute<int>( aLabel, "layer" );
 rot = parseOptionalAttribute<EROT>( aLabel, "rot" );
 xref = parseOptionalAttribute<wxString>( aLabel, "xref" );
 netname = aNetName;
}
 
 
EVIA::EVIA( wxXmlNode* aVia )
{
 /*
 <!ELEMENT via EMPTY>
 <!ATTLIST via
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 extent %Extent; #REQUIRED
 drill %Dimension; #REQUIRED
 diameter %Dimension; "0"
 shape %ViaShape; "round"
 alwaysstop %Bool; "no"
 >
 */
 
 x = parseRequiredAttribute<ECOORD>( aVia, "x" );
 y = parseRequiredAttribute<ECOORD>( aVia, "y" );
 
 wxString ext = parseRequiredAttribute<wxString>( aVia, "extent" );
 sscanf( ext.c_str(), "%d-%d", &layer_front_most, &layer_back_most );
 
 drill = parseRequiredAttribute<ECOORD>( aVia, "drill" );
 diam = parseOptionalAttribute<ECOORD>( aVia, "diameter" );
 shape = parseOptionalAttribute<wxString>( aVia, "shape" );
}
 
 
ECIRCLE::ECIRCLE( wxXmlNode* aCircle )
{
 /*
 <!ELEMENT circle EMPTY>
 <!ATTLIST circle
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 radius %Coord; #REQUIRED
 width %Dimension; #REQUIRED
 layer %Layer; #REQUIRED
 >
 */
 
 x = parseRequiredAttribute<ECOORD>( aCircle, "x" );
 y = parseRequiredAttribute<ECOORD>( aCircle, "y" );
 radius = parseRequiredAttribute<ECOORD>( aCircle, "radius" );
 width = parseRequiredAttribute<ECOORD>( aCircle, "width" );
 layer = parseRequiredAttribute<int>( aCircle, "layer" );
}
 
 
ERECT::ERECT( wxXmlNode* aRect )
{
 /*
 <!ELEMENT rectangle EMPTY>
 <!ATTLIST rectangle
 x1 %Coord; #REQUIRED
 y1 %Coord; #REQUIRED
 x2 %Coord; #REQUIRED
 y2 %Coord; #REQUIRED
 layer %Layer; #REQUIRED
 rot %Rotation; "R0"
 >
 */
 
 x1 = parseRequiredAttribute<ECOORD>( aRect, "x1" );
 y1 = parseRequiredAttribute<ECOORD>( aRect, "y1" );
 x2 = parseRequiredAttribute<ECOORD>( aRect, "x2" );
 y2 = parseRequiredAttribute<ECOORD>( aRect, "y2" );
 layer = parseRequiredAttribute<int>( aRect, "layer" );
 rot = parseOptionalAttribute<EROT>( aRect, "rot" );
}
 
 
EATTR::EATTR( wxXmlNode* aTree )
{
 /*
 <!ELEMENT attribute EMPTY>
 <!ATTLIST attribute
 name %String; #REQUIRED
 value %String; #IMPLIED
 x %Coord; #IMPLIED
 y %Coord; #IMPLIED
 size %Dimension; #IMPLIED
 layer %Layer; #IMPLIED
 font %TextFont; #IMPLIED
 ratio %Int; #IMPLIED
 rot %Rotation; "R0"
 display %AttributeDisplay; "value" -- only in <element> or <instance> context --
 constant %Bool; "no" -- only in <device> context --
 >
 */
 
 name = parseRequiredAttribute<wxString>( aTree, "name" );
 value = parseOptionalAttribute<wxString>( aTree, "value" );
 
 x = parseOptionalAttribute<ECOORD>( aTree, "x" );
 y = parseOptionalAttribute<ECOORD>( aTree, "y" );
 size = parseOptionalAttribute<ECOORD>( aTree, "size" );
 
 layer = parseOptionalAttribute<int>( aTree, "layer" );
 ratio = parseOptionalAttribute<double>( aTree, "ratio" );
 rot = parseOptionalAttribute<EROT>( aTree, "rot" );
 
 opt_wxString stemp = parseOptionalAttribute<wxString>( aTree, "display" );
 
 // (off | value | name | both)
 if( stemp == "off" )
 display = EATTR::Off;
 else if( stemp == "name" )
 display = EATTR::NAME;
 else if( stemp == "both" )
 display = EATTR::BOTH;
 else // "value" is the default
 display = EATTR::VALUE;
 
 stemp = parseOptionalAttribute<wxString>( aTree, "align" );
 
 align = stemp ? parseAlignment( *stemp ) : DEFAULT_ALIGNMENT;
}
 
 
EDIMENSION::EDIMENSION( wxXmlNode* aDimension )
{
 /*
 <!ELEMENT dimension EMPTY>
 <!ATTLIST dimension
 x1 %Coord; #REQUIRED
 y1 %Coord; #REQUIRED
 x2 %Coord; #REQUIRED
 y2 %Coord; #REQUIRED
 x3 %Coord; #REQUIRED
 y3 %Coord; #REQUIRED
 textsize %Coord;
 layer %Layer; #REQUIRED
 dtype %DimensionType; "parallel"
 >
 */
 
 x1 = parseRequiredAttribute<ECOORD>( aDimension, wxT( "x1" ) );
 y1 = parseRequiredAttribute<ECOORD>( aDimension, wxT( "y1" ) );
 x2 = parseRequiredAttribute<ECOORD>( aDimension, wxT( "x2" ) );
 y2 = parseRequiredAttribute<ECOORD>( aDimension, wxT( "y2" ) );
 x3 = parseRequiredAttribute<ECOORD>( aDimension, wxT( "x3" ) );
 y3 = parseRequiredAttribute<ECOORD>( aDimension, wxT( "y3" ) );
 textsize = parseOptionalAttribute<ECOORD>( aDimension, wxT( "textsize" ) );
 layer = parseRequiredAttribute<int>( aDimension, wxT( "layer" ) );
 dimensionType = parseOptionalAttribute<wxString>( aDimension, wxT( "dtype" ) );
}
 
 
ETEXT::ETEXT( wxXmlNode* aText )
{
 /*
 <!ELEMENT text (#PCDATA)>
 <!ATTLIST text
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 size %Dimension; #REQUIRED
 layer %Layer; #REQUIRED
 font %TextFont; "proportional"
 ratio %Int; "8"
 rot %Rotation; "R0"
 align %Align; "bottom-left"
 >
 */
 
 text = aText->GetNodeContent();
 x = parseRequiredAttribute<ECOORD>( aText, "x" );
 y = parseRequiredAttribute<ECOORD>( aText, "y" );
 size = parseRequiredAttribute<ECOORD>( aText, "size" );
 layer = parseRequiredAttribute<int>( aText, "layer" );
 
 font = parseOptionalAttribute<wxString>( aText, "font" );
 ratio = parseOptionalAttribute<double>( aText, "ratio" );
 rot = parseOptionalAttribute<EROT>( aText, "rot" );
 
 opt_wxString stemp = parseOptionalAttribute<wxString>( aText, "align" );
 
 align = stemp ? parseAlignment( *stemp ) : DEFAULT_ALIGNMENT;
}
 
 
wxSize ETEXT::ConvertSize() const
{
 wxSize textsize;
 
 if( font )
 {
 const wxString& fontName = font.CGet();
 
 if( fontName == "vector" )
 {
 textsize = wxSize( size.ToSchUnits(), size.ToSchUnits() );
  }
 else if( fontName == "fixed" )
 {
 textsize = wxSize( size.ToSchUnits(), size.ToSchUnits() * 0.80 );
 }
 else
 {
 textsize = wxSize( size.ToSchUnits(), size.ToSchUnits() );
 }
 }
 else
 {
 textsize = wxSize( size.ToSchUnits() * 0.85, size.ToSchUnits() );
 }
 
 return textsize;
}
 
 
EFRAME::EFRAME( wxXmlNode* aFrameNode )
{
 /*
 * <!ELEMENT frame EMPTY>
 * <!ATTLIST frame
 * x1 %Coord; #REQUIRED
 * y1 %Coord; #REQUIRED
 * x2 %Coord; #REQUIRED
 * y2 %Coord; #REQUIRED
 * columns %Int; #REQUIRED
 * rows %Int; #REQUIRED
 * layer %Layer; #REQUIRED
 * border-left %Bool; "yes"
 * border-top %Bool; "yes"
 * border-right %Bool; "yes"
 * border-bottom %Bool; "yes"
 * >
 */
 border_left = true;
 border_top = true;
 border_right = true;
 border_bottom = true;
 
 x1 = parseRequiredAttribute<ECOORD>( aFrameNode, "x1" );
 y1 = parseRequiredAttribute<ECOORD>( aFrameNode, "y1" );
 x2 = parseRequiredAttribute<ECOORD>( aFrameNode, "x2" );
 y2 = parseRequiredAttribute<ECOORD>( aFrameNode, "y2" );
 columns = parseRequiredAttribute<int>( aFrameNode, "columns" );
 rows = parseRequiredAttribute<int>( aFrameNode, "rows" );
 layer = parseRequiredAttribute<int>( aFrameNode, "layer" );
 border_left = parseOptionalAttribute<bool>( aFrameNode, "border-left" );
 border_top = parseOptionalAttribute<bool>( aFrameNode, "border-top" );
 border_right = parseOptionalAttribute<bool>( aFrameNode, "border-right" );
 border_bottom = parseOptionalAttribute<bool>( aFrameNode, "border-bottom" );
}
 
 
EPAD_COMMON::EPAD_COMMON( wxXmlNode* aPad )
{
 // #REQUIRED says DTD, throw exception if not found
 name = parseRequiredAttribute<wxString>( aPad, "name" );
 x = parseRequiredAttribute<ECOORD>( aPad, "x" );
 y = parseRequiredAttribute<ECOORD>( aPad, "y" );
 rot = parseOptionalAttribute<EROT>( aPad, "rot" );
 stop = parseOptionalAttribute<bool>( aPad, "stop" );
 thermals = parseOptionalAttribute<bool>( aPad, "thermals" );
}
 
 
EPAD::EPAD( wxXmlNode* aPad )
 : EPAD_COMMON( aPad )
{
 /*
 <!ELEMENT pad EMPTY>
 <!ATTLIST pad
 name %String; #REQUIRED
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 drill %Dimension; #REQUIRED
 diameter %Dimension; "0"
 shape %PadShape; "round"
 rot %Rotation; "R0"
 stop %Bool; "yes"
 thermals %Bool; "yes"
 first %Bool; "no"
 >
 */
 
 // #REQUIRED says DTD, throw exception if not found
 drill = parseRequiredAttribute<ECOORD>( aPad, "drill" );
 
 // Optional attributes
 diameter = parseOptionalAttribute<ECOORD>( aPad, "diameter" );
 
 opt_wxString s = parseOptionalAttribute<wxString>( aPad, "shape" );
 
 // (square | round | octagon | long | offset)
 if( s == "square" )
 shape = EPAD::SQUARE;
 else if( s == "round" )
 shape = EPAD::ROUND;
 else if( s == "octagon" )
 shape = EPAD::OCTAGON;
 else if( s == "long" )
 shape = EPAD::LONG;
 else if( s == "offset" )
 shape = EPAD::OFFSET;
 
 first = parseOptionalAttribute<bool>( aPad, "first" );
}
 
 
ESMD::ESMD( wxXmlNode* aSMD )
 : EPAD_COMMON( aSMD )
{
 /*
 <!ATTLIST smd
 name %String; #REQUIRED
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 dx %Dimension; #REQUIRED
 dy %Dimension; #REQUIRED
 layer %Layer; #REQUIRED
 roundness %Int; "0"
 rot %Rotation; "R0"
 stop %Bool; "yes"
 thermals %Bool; "yes"
 cream %Bool; "yes"
 >
 */
 
 // DTD #REQUIRED, throw exception if not found
 dx = parseRequiredAttribute<ECOORD>( aSMD, "dx" );
 dy = parseRequiredAttribute<ECOORD>( aSMD, "dy" );
 layer = parseRequiredAttribute<int>( aSMD, "layer" );
 
 roundness = parseOptionalAttribute<int>( aSMD, "roundness" );
 cream = parseOptionalAttribute<bool>( aSMD, "cream" );
}
 
 
EPIN::EPIN( wxXmlNode* aPin )
{
 /*
 <!ELEMENT pin EMPTY>
 <!ATTLIST pin
 name %String; #REQUIRED
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 visible %PinVisible; "both"
 length %PinLength; "long"
 direction %PinDirection; "io"
 function %PinFunction; "none"
 swaplevel %Int; "0"
 rot %Rotation; "R0"
 >
 */
 
 // DTD #REQUIRED, throw exception if not found
 name = parseRequiredAttribute<wxString>( aPin, "name" );
 x = parseRequiredAttribute<ECOORD>( aPin, "x" );
 y = parseRequiredAttribute<ECOORD>( aPin, "y" );
 
 visible = parseOptionalAttribute<wxString>( aPin, "visible" );
 length = parseOptionalAttribute<wxString>( aPin, "length" );
 direction = parseOptionalAttribute<wxString>( aPin, "direction" );
 function = parseOptionalAttribute<wxString>( aPin, "function" );
 swaplevel = parseOptionalAttribute<int>( aPin, "swaplevel" );
 rot = parseOptionalAttribute<EROT>( aPin, "rot" );
}
 
 
EVERTEX::EVERTEX( wxXmlNode* aVertex )
{
 /*
 <!ELEMENT vertex EMPTY>
 <!ATTLIST vertex
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 curve %WireCurve; "0" -- the curvature from this vertex to the next one --
 >
 */
 
 x = parseRequiredAttribute<ECOORD>( aVertex, "x" );
 y = parseRequiredAttribute<ECOORD>( aVertex, "y" );
 curve = parseOptionalAttribute<double>( aVertex, "curve" );
}
 
 
EPOLYGON::EPOLYGON( wxXmlNode* aPolygon )
{
 /*
 <!ATTLIST polygon
 width %Dimension; #REQUIRED
 layer %Layer; #REQUIRED
 spacing %Dimension; #IMPLIED
 pour %PolygonPour; "solid"
 isolate %Dimension; #IMPLIED -- only in <signal> or <package> context --
 orphans %Bool; "no" -- only in <signal> context --
 thermals %Bool; "yes" -- only in <signal> context --
 rank %Int; "0" -- 1..6 in <signal> context, 0 or 7 in
 <package> context --
 >
 */
 
 width = parseRequiredAttribute<ECOORD>( aPolygon, "width" );
 layer = parseRequiredAttribute<int>( aPolygon, "layer" );
 
 spacing = parseOptionalAttribute<ECOORD>( aPolygon, "spacing" );
 isolate = parseOptionalAttribute<ECOORD>( aPolygon, "isolate" );
 opt_wxString s = parseOptionalAttribute<wxString>( aPolygon, "pour" );
 
 // default pour to solid fill
 pour = EPOLYGON::SOLID;
 
 // (solid | hatch | cutout)
 if( s == "hatch" )
 pour = EPOLYGON::HATCH;
 else if( s == "cutout" )
 pour = EPOLYGON::CUTOUT;
 
 orphans = parseOptionalAttribute<bool>( aPolygon, "orphans" );
 thermals = parseOptionalAttribute<bool>( aPolygon, "thermals" );
 rank = parseOptionalAttribute<int>( aPolygon, "rank" );
}
 
 
EHOLE::EHOLE( wxXmlNode* aHole )
{
 /*
 <!ELEMENT hole EMPTY>
 <!ATTLIST hole
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 drill %Dimension; #REQUIRED
 >
 */
 
 // #REQUIRED:
 x = parseRequiredAttribute<ECOORD>( aHole, "x" );
 y = parseRequiredAttribute<ECOORD>( aHole, "y" );
 drill = parseRequiredAttribute<ECOORD>( aHole, "drill" );
}
 
 
EELEMENT::EELEMENT( wxXmlNode* aElement )
{
 /*
 <!ELEMENT element (attribute*, variant*)>
 <!ATTLIST element
 name %String; #REQUIRED
 library %String; #REQUIRED
 package %String; #REQUIRED
 value %String; #REQUIRED
 x %Coord; #REQUIRED
 y %Coord; #REQUIRED
 locked %Bool; "no"
 smashed %Bool; "no"
 rot %Rotation; "R0"
 >
 */
 
 // #REQUIRED
 name = parseRequiredAttribute<wxString>( aElement, "name" );
 library = parseRequiredAttribute<wxString>( aElement, "library" );
 value = parseRequiredAttribute<wxString>( aElement, "value" );
 std::string p = parseRequiredAttribute<std::string>( aElement, "package" );
 ReplaceIllegalFileNameChars( &p, '_' );
 package = wxString::FromUTF8( p.c_str() );
 
 x = parseRequiredAttribute<ECOORD>( aElement, "x" );
 y = parseRequiredAttribute<ECOORD>( aElement, "y" );
 
 // optional
 locked = parseOptionalAttribute<bool>( aElement, "locked" );
 smashed = parseOptionalAttribute<bool>( aElement, "smashed" );
 rot = parseOptionalAttribute<EROT>( aElement, "rot" );
}
 
 
ELAYER::ELAYER( wxXmlNode* aLayer )
{
 /*
 <!ELEMENT layer EMPTY>
 <!ATTLIST layer
 number %Layer; #REQUIRED
 name %String; #REQUIRED
 color %Int; #REQUIRED
 fill %Int; #REQUIRED
 visible %Bool; "yes"
 active %Bool; "yes"
 >
 */
 
 number = parseRequiredAttribute<int>( aLayer, "number" );
 name = parseRequiredAttribute<wxString>( aLayer, "name" );
 color = parseRequiredAttribute<int>( aLayer, "color" );
 fill = 1; // Temporary value.
 visible = parseOptionalAttribute<bool>( aLayer, "visible" );
 active = parseOptionalAttribute<bool>( aLayer, "active" );
}
 
 
EPART::EPART( wxXmlNode* aPart )
{
 /*
 * <!ELEMENT part (attribute*, variant*)>
 * <!ATTLIST part
 * name %String; #REQUIRED
 * library %String; #REQUIRED
 * deviceset %String; #REQUIRED
 * device %String; #REQUIRED
 * technology %String; ""
 * value %String; #IMPLIED
 * >
 */
 // #REQUIRED
 name = parseRequiredAttribute<wxString>( aPart, "name" );
 library = parseRequiredAttribute<wxString>( aPart, "library" );
 deviceset = parseRequiredAttribute<wxString>( aPart, "deviceset" );
 device = parseRequiredAttribute<wxString>( aPart, "device" );
 technology = parseOptionalAttribute<wxString>( aPart, "technology" );
 value = parseOptionalAttribute<wxString>( aPart, "value" );
 
 for( wxXmlNode* child = aPart->GetChildren(); child; child = child->GetNext() )
 {
 if( child->GetName() == "attribute" )
 {
 std::string aname, avalue;
 
 for( wxXmlAttribute* x = child->GetAttributes(); x; x = x->GetNext() )
 {
 if( x->GetName() == "name" )
 aname = x->GetValue();
 else if( x->GetName() == "value" )
 avalue = x->GetValue();
 }
 
 if( aname.size() && avalue.size() )
 attribute[aname] = avalue;
 }
 else if( child->GetName() == "variant" )
 {
 std::string aname, avalue;
 
 for( wxXmlAttribute* x = child->GetAttributes(); x; x = x->GetNext() )
 {
 if( x->GetName() == "name" )
 aname = x->GetValue();
 else if( x->GetName() == "value" )
 avalue = x->GetValue();
 }
 
 if( aname.size() && avalue.size() )
 variant[aname] = avalue;
 }
 }
}
 
 
EINSTANCE::EINSTANCE( wxXmlNode* aInstance )
{
 /*
 * <!ELEMENT instance (attribute)*>
 * <!ATTLIST instance
 * part %String; #REQUIRED
 * gate %String; #REQUIRED
 * x %Coord; #REQUIRED
 * y %Coord; #REQUIRED
 * smashed %Bool; "no"
 * rot %Rotation; "R0"
 * >
 */
 part = parseRequiredAttribute<wxString>( aInstance, "part" );
 gate = parseRequiredAttribute<wxString>( aInstance, "gate" );
 
 x = parseRequiredAttribute<ECOORD>( aInstance, "x" );
 y = parseRequiredAttribute<ECOORD>( aInstance, "y" );
 
 // optional
 smashed = parseOptionalAttribute<bool>( aInstance, "smashed" );
 rot = parseOptionalAttribute<EROT>( aInstance, "rot" );
}
 
 
EGATE::EGATE( wxXmlNode* aGate )
{
 /*
 * <!ELEMENT gate EMPTY>
 * <!ATTLIST gate
 * name %String; #REQUIRED
 * symbol %String; #REQUIRED
 * x %Coord; #REQUIRED
 * y %Coord; #REQUIRED
 * addlevel %GateAddLevel; "next"
 * swaplevel %Int; "0"
 * >
 */
 
 name = parseRequiredAttribute<wxString>( aGate, "name" );
 symbol = parseRequiredAttribute<wxString>( aGate, "symbol" );
 
 x = parseRequiredAttribute<ECOORD>( aGate, "x" );
 y = parseRequiredAttribute<ECOORD>( aGate, "y" );
 
 opt_wxString stemp = parseOptionalAttribute<wxString>( aGate, "addlevel" );
 
 // (off | value | name | both)
 if( stemp == "must" )
 addlevel = EGATE::MUST;
 else if( stemp == "can" )
 addlevel = EGATE::CAN;
 else if( stemp == "next" )
 addlevel = EGATE::NEXT;
 else if( stemp == "request" )
 addlevel = EGATE::REQUEST;
 else if( stemp == "always" )
 addlevel = EGATE::ALWAYS;
 else
 addlevel = EGATE::NEXT;
}
 
 
ECONNECT::ECONNECT( wxXmlNode* aConnect )
{
 /*
 * <!ELEMENT connect EMPTY>
 * <!ATTLIST connect
 * gate %String; #REQUIRED
 * pin %String; #REQUIRED
 * pad %String; #REQUIRED
 * route %ContactRoute; "all"
 * >
 */
 gate = parseRequiredAttribute<wxString>( aConnect, "gate" );
 pin = parseRequiredAttribute<wxString>( aConnect, "pin" );
 pad = parseRequiredAttribute<wxString>( aConnect, "pad" );
}
 
 
EDEVICE::EDEVICE( wxXmlNode* aDevice )
{
 /*
 <!ELEMENT device (connects?, technologies?)>
 <!ATTLIST device
 name %String; ""
 package %String; #IMPLIED
 >
 */
 name = parseRequiredAttribute<wxString>( aDevice, "name" );
 opt_wxString pack = parseOptionalAttribute<wxString>( aDevice, "package" );
 
 if( pack )
 {
 std::string p( pack->c_str() );
 ReplaceIllegalFileNameChars( &p, '_' );
 package.Set( wxString::FromUTF8( p.c_str() ) );
 }
 
 NODE_MAP aDeviceChildren = MapChildren( aDevice );
 wxXmlNode* connectNode = getChildrenNodes( aDeviceChildren, "connects" );
 
 while( connectNode )
 {
 connects.emplace_back( connectNode );
 connectNode = connectNode->GetNext();
 }
}
 
 
EDEVICE_SET::EDEVICE_SET( wxXmlNode* aDeviceSet )
{
 /*
 <!ELEMENT deviceset (description?, gates, devices)>
 <!ATTLIST deviceset
 name %String; #REQUIRED
 prefix %String; ""
 uservalue %Bool; "no"
 >
 */
 
 name = parseRequiredAttribute<wxString>( aDeviceSet, "name" );
 prefix = parseOptionalAttribute<wxString>( aDeviceSet, "prefix" );
 uservalue = parseOptionalAttribute<bool>( aDeviceSet, "uservalue" );
}
 
 
ECLASS::ECLASS( wxXmlNode* aClass )
{
 number = parseRequiredAttribute<wxString>( aClass, "number" );
 name = parseRequiredAttribute<wxString>( aClass, "name" );
 
 for( wxXmlNode* child = aClass->GetChildren(); child; child = child->GetNext() )
 {
  if( child->GetName() == "clearance" )
 {
 wxString to = parseRequiredAttribute<wxString>( child, "class" );
 ECOORD value = parseRequiredAttribute<ECOORD>( child, "value" );
 
 clearanceMap[to] = value;
 }
 }
}