drc_rule_parser.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020-2021 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
 * 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 <drc/drc_rule_parser.h>
#include <drc/drc_rule_condition.h>
#include <drc_rules_lexer.h>
#include <pcb_expr_evaluator.h>
#include <reporter.h>

using namespace DRCRULE_T;


DRC_RULES_PARSER::DRC_RULES_PARSER( const wxString& aSource, const wxString& aSourceDescr ) :
 DRC_RULES_LEXER( aSource.ToStdString(), aSourceDescr ),
 m_requiredVersion( 0 ),
 m_tooRecent( false ),
 m_reporter( nullptr )
{
}


DRC_RULES_PARSER::DRC_RULES_PARSER( FILE* aFile, const wxString& aFilename ) :
 DRC_RULES_LEXER( aFile, aFilename ),
 m_requiredVersion( 0 ),
 m_tooRecent( false ),
 m_reporter( nullptr )
{
}


void DRC_RULES_PARSER::reportError( const wxString& aMessage )
{
 wxString rest;
 wxString first = aMessage.BeforeFirst( '|', &rest );

 if( m_reporter )
 {
 wxString msg = wxString::Format( _( "ERROR: <a href='%d:%d'>%s</a>%s" ), CurLineNumber(),
 CurOffset(), first, rest );

 m_reporter->Report( msg, RPT_SEVERITY_ERROR );
 }
 else
 {
 wxString msg = wxString::Format( _( "ERROR: %s%s" ), first, rest );

 THROW_PARSE_ERROR( msg, CurSource(), CurLine(), CurLineNumber(), CurOffset() );
 }
}


void DRC_RULES_PARSER::parseUnknown()
{
 int depth = 1;

 for( T token = NextTok(); token != T_EOF; token = NextTok() )
 {
 if( token == T_LEFT )
 depth++;

 if( token == T_RIGHT )
 {
 if( --depth == 0 )
 break;
 }
 }
}


void DRC_RULES_PARSER::Parse( std::vector<DRC_RULE*>& aRules, REPORTER* aReporter )
{
 bool haveVersion = false;
 wxString msg;

 m_reporter = aReporter;

 for( T token = NextTok(); token != T_EOF; token = NextTok() )
 {
 if( token != T_LEFT )
 reportError( _( "Missing '('." ) );

 token = NextTok();

 if( !haveVersion && token != T_version )
 {
 reportError( _( "Missing version statement." ) );
 haveVersion = true; // don't keep on reporting it
 }

 switch( token )
 {
 case T_version:
 haveVersion = true;
 token = NextTok();

 if( (int) token == DSN_RIGHT )
 {
 reportError( _( "Missing version number." ) );
 break;
 }

 if( (int) token == DSN_NUMBER )
 {
 m_requiredVersion = (int)strtol( CurText(), nullptr, 10 );
 m_tooRecent = ( m_requiredVersion > DRC_RULE_FILE_VERSION );
 token = NextTok();
 }
 else
 {
 msg.Printf( _( "Unrecognized item '%s'.| Expected version number." ),
 FromUTF8() );
 reportError( msg );
  }

 if( (int) token != DSN_RIGHT )
 {
 msg.Printf( _( "Unrecognized item '%s'." ),
 FromUTF8() );
 reportError( msg );
 parseUnknown();
 }

 break;

 case T_rule:
 aRules.push_back( parseDRC_RULE() );
 break;

 case T_EOF:
 reportError( _( "Incomplete statement." ) );
 break;

 default:
 msg.Printf( _( "Unrecognized item '%s'.| Expected %s." ), FromUTF8(),
 "'rule', 'version'" );
 reportError( msg );
 parseUnknown();
 }
 }

 if( m_reporter && !m_reporter->HasMessage() )
 m_reporter->Report( _( "No errors found." ), RPT_SEVERITY_INFO );

 m_reporter = nullptr;
}


DRC_RULE* DRC_RULES_PARSER::parseDRC_RULE()
{
 DRC_RULE* rule = new DRC_RULE();
 T token = NextTok();
 wxString msg;

 if( !IsSymbol( token ) )
 reportError( _( "Missing rule name." ) );

 rule->m_Name = FromUTF8();

 for( token = NextTok(); token != T_RIGHT && token != T_EOF; token = NextTok() )
 {
 if( token != T_LEFT )
 reportError( _( "Missing '('." ) );

 token = NextTok();

 switch( token )
 {
 case T_constraint:
 parseConstraint( rule );
 break;

 case T_condition:
 token = NextTok();

 if( (int) token == DSN_RIGHT )
 {
 reportError( _( "Missing condition expression." ) );
 break;
 }

 if( IsSymbol( token ) )
 {
 rule->m_Condition = new DRC_RULE_CONDITION( FromUTF8() );
 rule->m_Condition->Compile( m_reporter, CurLineNumber(), CurOffset() );
 }
 else
 {
 msg.Printf( _( "Unrecognized item '%s'.| Expected quoted expression." ),
 FromUTF8() );
 reportError( msg );
 }

 if( (int) NextTok() != DSN_RIGHT )
 {
 reportError( wxString::Format( _( "Unrecognized item '%s'." ), FromUTF8() ) );
 parseUnknown();
 }

 break;

 case T_layer:
 rule->m_LayerSource = FromUTF8();
 rule->m_LayerCondition = parseLayer();
 break;

 case T_EOF:
 reportError( _( "Incomplete statement." ) );
 return rule;

 default:
 msg.Printf( _( "Unrecognized item '%s'.| Expected %s." ), FromUTF8(),
 "constraint, condition or disallow" );
 reportError( msg );
 parseUnknown();
 }
 }

 if( (int) CurTok() != DSN_RIGHT )
 reportError( _( "Missing ')'." ) );

 return rule;
}


void DRC_RULES_PARSER::parseConstraint( DRC_RULE* aRule )
{
 DRC_CONSTRAINT c;
 int value;
 wxString msg;

 T token = NextTok();

 if( (int) token == DSN_RIGHT || token == T_EOF )
 {
 msg.Printf( _( "Missing constraint type.| Expected %s." ),
 "clearance, hole_clearance, edge_clearance, hole, hole_to_hole, "
 "courtyard_clearance, silk_clearance, track_width, annular_width, via_diameter, "
 "disallow, length, skew, via_count, diff_pair_gap or diff_pair_uncoupled" );
 reportError( msg );
 return;
 }

 switch( token )
 {
 case T_clearance: c.m_Type = CLEARANCE_CONSTRAINT; break;
 case T_hole_clearance: c.m_Type = HOLE_CLEARANCE_CONSTRAINT; break;
 case T_edge_clearance: c.m_Type = EDGE_CLEARANCE_CONSTRAINT; break;
 case T_hole: // legacy token
 case T_hole_size: c.m_Type = HOLE_SIZE_CONSTRAINT; break;
 case T_hole_to_hole: c.m_Type = HOLE_TO_HOLE_CONSTRAINT; break;
 case T_courtyard_clearance: c.m_Type = COURTYARD_CLEARANCE_CONSTRAINT; break;
 case T_silk_clearance: c.m_Type = SILK_CLEARANCE_CONSTRAINT; break;
 case T_track_width: c.m_Type = TRACK_WIDTH_CONSTRAINT; break;
 case T_annular_width: c.m_Type = ANNULAR_WIDTH_CONSTRAINT; break;
 case T_via_diameter: c.m_Type = VIA_DIAMETER_CONSTRAINT; break;
 case T_disallow: c.m_Type = DISALLOW_CONSTRAINT; break;
 case T_length: c.m_Type = LENGTH_CONSTRAINT; break;
 case T_skew: c.m_Type = SKEW_CONSTRAINT; break;
 case T_via_count: c.m_Type = VIA_COUNT_CONSTRAINT; break;
 case T_diff_pair_gap: c.m_Type = DIFF_PAIR_GAP_CONSTRAINT; break;
 case T_diff_pair_uncoupled: c.m_Type = DIFF_PAIR_MAX_UNCOUPLED_CONSTRAINT; break;
 default:
 msg.Printf( _( "Unrecognized item '%s'.| Expected %s." ), FromUTF8(),
 "clearance, hole_clearance, edge_clearance, hole_size, hole_to_hole, "
 "courtyard_clearance, silk_clearance, track_width, annular_width, via_diameter, "
 "disallow, length, skew, diff_pair_gap or diff_pair_uncoupled." );
 reportError( msg );
 }

 if( aRule->FindConstraint( c.m_Type ) )
 {
 msg.Printf( _( "Rule already has a '%s' constraint." ), FromUTF8() );
 reportError( msg );
 }

 if( c.m_Type == DISALLOW_CONSTRAINT )
 {
 for( token = NextTok(); token != T_RIGHT; token = NextTok() )
 {
 if( (int) token == DSN_STRING )
 token = GetCurStrAsToken();

 switch( token )
 {
 case T_track: c.m_DisallowFlags |= DRC_DISALLOW_TRACKS; break;
 case T_via: c.m_DisallowFlags |= DRC_DISALLOW_VIAS; break;
 case T_micro_via: c.m_DisallowFlags |= DRC_DISALLOW_MICRO_VIAS; break;
 case T_buried_via: c.m_DisallowFlags |= DRC_DISALLOW_BB_VIAS; break;
 case T_pad: c.m_DisallowFlags |= DRC_DISALLOW_PADS; break;
 case T_zone: c.m_DisallowFlags |= DRC_DISALLOW_ZONES; break;
 case T_text: c.m_DisallowFlags |= DRC_DISALLOW_TEXTS; break;
 case T_graphic: c.m_DisallowFlags |= DRC_DISALLOW_GRAPHICS; break;
 case T_hole: c.m_DisallowFlags |= DRC_DISALLOW_HOLES; break;
 case T_footprint: c.m_DisallowFlags |= DRC_DISALLOW_FOOTPRINTS; break;

 case T_EOF:
 reportError( _( "Missing ')'." ) );
 return;

 default:
 msg.Printf( _( "Unrecognized item '%s'.| Expected %s." ), FromUTF8(),
 "track, via, micro_via, buried_via, pad, zone, text, graphic, hole "
 "or footprint." );
 reportError( msg );
 break;
 }
 }

 if( (int) CurTok() != DSN_RIGHT )
 reportError( _( "Missing ')'." ) );

 aRule->AddConstraint( c );
 return;
 }

 for( token = NextTok(); token != T_RIGHT && token != T_EOF; token = NextTok() )
 {
 if( token != T_LEFT )
 reportError( _( "Missing '('." ) );

 token = NextTok();

 switch( token )
 {
 case T_min:
 token = NextTok();

 if( (int) token == DSN_RIGHT )
 {
 reportError( _( "Missing min value." ) );
 break;
 }

 parseValueWithUnits( FromUTF8(), value );
 c.m_Value.SetMin( value );

 if( (int) NextTok() != DSN_RIGHT )
 {
 reportError( wxString::Format( _( "Unrecognized item '%s'." ), FromUTF8() ) );
 parseUnknown();
 }

 break;

 case T_max:
 token = NextTok();

 if( (int) token == DSN_RIGHT )
 {
 reportError( _( "Missing max value." ) );
 break;
 }

 parseValueWithUnits( FromUTF8(), value );
 c.m_Value.SetMax( value );

 if( (int) NextTok() != DSN_RIGHT )
 {
 reportError( wxString::Format( _( "Unrecognized item '%s'." ), FromUTF8() ) );
 parseUnknown();
 }

 break;

 case T_opt:
 token = NextTok();

 if( (int) token == DSN_RIGHT )
 {
 reportError( _( "Missing opt value." ) );
 break;
 }

 parseValueWithUnits( FromUTF8(), value );
 c.m_Value.SetOpt( value );

 if( (int) NextTok() != DSN_RIGHT )
 {
 reportError( wxString::Format( _( "Unrecognized item '%s'." ), FromUTF8() ) );
 parseUnknown();
 }

 break;

 case T_EOF:
 reportError( _( "Incomplete statement." ) );
 return;

 default:
 msg.Printf( _( "Unrecognized item '%s'.| Expected %s." ),
 FromUTF8(),
 "min, max or opt" );
 reportError( msg );
 parseUnknown();
 }
 }

 if( (int) CurTok() != DSN_RIGHT )
 reportError( _( "Missing ')'." ) );

 aRule->AddConstraint( c );
}


void DRC_RULES_PARSER::parseValueWithUnits( const wxString& aExpr, int& aResult )
{
 auto errorHandler = [&]( const wxString& aMessage, int aOffset )
 {
 wxString rest;
 wxString first = aMessage.BeforeFirst( '|', &rest );

 if( m_reporter )
 {
 wxString msg = wxString::Format( _( "ERROR: <a href='%d:%d'>%s</a>%s" ),
 CurLineNumber(), CurOffset() + aOffset, first, rest );

 m_reporter->Report( msg, RPT_SEVERITY_ERROR );
 }
 else
 {
 wxString msg = wxString::Format( _( "ERROR: %s%s" ), first, rest );

 THROW_PARSE_ERROR( msg, CurSource(), CurLine(), CurLineNumber(),
 CurOffset() + aOffset );
 }
 };

 PCB_EXPR_EVALUATOR evaluator;
 evaluator.SetErrorCallback( errorHandler );

 evaluator.Evaluate( aExpr );
 aResult = evaluator.Result();
}


LSET DRC_RULES_PARSER::parseLayer()
{
 LSET retVal;
 int token = NextTok();

 if( (int) token == DSN_RIGHT )
 {
 reportError( _( "Missing layer name or type." ) );
 return LSET::AllCuMask();
 }
 else if( token == T_outer )
 {
 retVal = LSET::ExternalCuMask();
 }
 else if( token == T_inner )
 {
 retVal = LSET::InternalCuMask();
 }
 else
 {
 wxString layerName = FromUTF8();
 wxPGChoices& layerMap = ENUM_MAP<PCB_LAYER_ID>::Instance().Choices();

 for( unsigned ii = 0; ii < layerMap.GetCount(); ++ii )
 {
 wxPGChoiceEntry& entry = layerMap[ii];

 if( entry.GetText().Matches( layerName ) )
 retVal.set( ToLAYER_ID( entry.GetValue() ) );
 }

 if( !retVal.any() )
 {
 reportError( wxString::Format( _( "Unrecognized layer '%s'." ), layerName ) );
 retVal.set( Rescue );
 }
 }

 if( (int) NextTok() != DSN_RIGHT )
 {
 reportError( wxString::Format( _( "Unrecognized item '%s'." ), FromUTF8() ) );
 parseUnknown();
 }

 return retVal;
}