hash_eda.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2017 CERN
 * Copyright (C) 2020-2021 KiCad Developers, see AUTHORS.txt for contributors.
 * @author Maciej Suminski <[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 <hash_eda.h>

#include <footprint.h>
#include <fp_text.h>
#include <fp_shape.h>
#include <pad.h>

#include <functional>

using namespace std;

// Common calculation part for all BOARD_ITEMs
static inline size_t hash_board_item( const BOARD_ITEM* aItem, int aFlags )
{
 size_t ret = 0;

 if( aFlags & HASH_LAYER )
 ret = hash<unsigned long long>{}( aItem->GetLayerSet().to_ullong() );

 return ret;
}


size_t hash_fp_item( const EDA_ITEM* aItem, int aFlags )
{
 size_t ret = 0;

 switch( aItem->Type() )
 {
 case PCB_FOOTPRINT_T:
 {
 const FOOTPRINT* footprint = static_cast<const FOOTPRINT*>( aItem );

 ret = hash_board_item( footprint, aFlags );

 if( aFlags & HASH_POS )
 hash_combine( ret, footprint->GetPosition().x, footprint->GetPosition().y );

 if( aFlags & HASH_ROT )
 hash_combine( ret, footprint->GetOrientation() );

 for( BOARD_ITEM* item : footprint->GraphicalItems() )
 hash_combine( ret, hash_fp_item( item, aFlags ) );

 for( PAD* pad : footprint->Pads() )
 hash_combine( ret, hash_fp_item( static_cast<EDA_ITEM*>( pad ), aFlags ) );
 }
 break;

 case PCB_PAD_T:
 {
 const PAD* pad = static_cast<const PAD*>( aItem );

 ret = hash<int>{}( static_cast<int>( pad->GetShape() ) << 16 );
 hash_combine( ret, pad->GetDrillShape() << 18 );
 hash_combine( ret, pad->GetSize().x << 8 );
 hash_combine( ret, pad->GetSize().y << 9 );
 hash_combine( ret, pad->GetOffset().x << 6 );
 hash_combine( ret, pad->GetOffset().y << 7 );
 hash_combine( ret, pad->GetDelta().x << 4 );
 hash_combine( ret, pad->GetDelta().y << 5 );

 hash_combine( ret, hash_board_item( pad, aFlags ) );

 if( aFlags & HASH_POS )
 {
 if( aFlags & REL_COORD )
 hash_combine( ret, pad->GetPos0().x, pad->GetPos0().y );
 else
 hash_combine( ret, pad->GetPosition().x, pad->GetPosition().y );
 }

 if( aFlags & HASH_ROT )
 hash_combine( ret, pad->GetOrientation() );

 if( aFlags & HASH_NET )
 hash_combine( ret, pad->GetNetCode() );
 }
 break;

 case PCB_FP_TEXT_T:
 {
 const FP_TEXT* text = static_cast<const FP_TEXT*>( aItem );

 if( !( aFlags & HASH_REF ) && text->GetType() == FP_TEXT::TEXT_is_REFERENCE )
 break;

 if( !( aFlags & HASH_VALUE ) && text->GetType() == FP_TEXT::TEXT_is_VALUE )
 break;

 ret = hash_board_item( text, aFlags );
 hash_combine( ret, text->GetText().ToStdString() );
 hash_combine( ret, text->IsItalic() );
 hash_combine( ret, text->IsBold() );
 hash_combine( ret, text->IsMirrored() );
 hash_combine( ret, text->GetTextWidth() );
 hash_combine( ret, text->GetTextHeight() );
 hash_combine( ret, text->GetHorizJustify() );
 hash_combine( ret, text->GetVertJustify() );

 if( aFlags & HASH_POS )
 {
 if( aFlags & REL_COORD )
 hash_combine( ret, text->GetPos0().x, text->GetPos0().y );
 else
 hash_combine( ret, text->GetPosition().x, text->GetPosition().y );
 }

 if( aFlags & HASH_ROT )
 hash_combine( ret, text->GetTextAngle() );
 }
 break;

 case PCB_FP_SHAPE_T:
 {
 const FP_SHAPE* shape = static_cast<const FP_SHAPE*>( aItem );
 ret = hash_board_item( shape, aFlags );
 hash_combine( ret, shape->GetShape() );
 hash_combine( ret, shape->GetWidth() );
 hash_combine( ret, shape->IsFilled() );

 if( shape->GetShape() == SHAPE_T::ARC || shape->GetShape() == SHAPE_T::CIRCLE )
 hash_combine( ret, shape->GetRadius() );

 if( aFlags & HASH_POS )
 {
 if( aFlags & REL_COORD )
 {
 hash_combine( ret, shape->GetStart0().x );
 hash_combine( ret, shape->GetStart0().y );
 hash_combine( ret, shape->GetEnd0().x );
 hash_combine( ret, shape->GetEnd0().y );

 if( shape->GetShape() == SHAPE_T::ARC )
 {
 hash_combine( ret, shape->GetCenter0().x );
 hash_combine( ret, shape->GetCenter0().y );
 hash_combine( ret, shape->GetArcAngle() );
 }
 }
 else
 {
 hash_combine( ret, shape->GetStart().x );
 hash_combine( ret, shape->GetStart().y );
 hash_combine( ret, shape->GetEnd().x );
 hash_combine( ret, shape->GetEnd().y );

 if( shape->GetShape() == SHAPE_T::ARC )
 {
 hash_combine( ret, shape->GetCenter().x );
 hash_combine( ret, shape->GetCenter().y );
 hash_combine( ret, shape->GetArcAngle() );
 }
 }
 }
 }
 break;

 default:
 wxASSERT_MSG( false, wxT( "Unhandled type in function hash_fp_item() (exporter_gencad.cpp)" ) );
 }

 return ret;
}