kicad/pcbnew/pcb_expr_evaluator.h

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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2019-2020 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
*/
#ifndef __PCB_EXPR_EVALUATOR_H
#define __PCB_EXPR_EVALUATOR_H
#include <unordered_map>
#include <property.h>
#include <property_mgr.h>
#include <libeval_compiler/libeval_compiler.h>
class BOARD_ITEM;
class PCB_EXPR_VAR_REF;
class PCB_EXPR_UCODE final : public LIBEVAL::UCODE
{
public:
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PCB_EXPR_UCODE() {};
virtual ~PCB_EXPR_UCODE() {};
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virtual std::unique_ptr<LIBEVAL::VAR_REF> CreateVarRef( const wxString& aVar, const wxString& aField ) override;
virtual LIBEVAL::FUNC_CALL_REF CreateFuncCall( const wxString& aName ) override;
};
class PCB_EXPR_CONTEXT : public LIBEVAL::CONTEXT
{
public:
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PCB_EXPR_CONTEXT( PCB_LAYER_ID aLayer = UNDEFINED_LAYER ) :
m_layer( aLayer )
{
m_items[0] = nullptr;
m_items[1] = nullptr;
}
void SetItems( BOARD_ITEM* a, BOARD_ITEM* b = nullptr )
{
m_items[0] = a;
m_items[1] = b;
}
BOARD_ITEM* GetItem( int index ) const
{
return m_items[index];
}
PCB_LAYER_ID GetLayer() const
{
return m_layer;
}
private:
BOARD_ITEM* m_items[2];
PCB_LAYER_ID m_layer;
};
class PCB_EXPR_VAR_REF : public LIBEVAL::VAR_REF
{
public:
PCB_EXPR_VAR_REF( int aItemIndex ) :
m_itemIndex( aItemIndex ),
m_type( LIBEVAL::VT_UNDEFINED ),
m_isEnum( false )
{
//printf("*** CreateVarRef %p %d\n", this, aItemIndex );
}
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~PCB_EXPR_VAR_REF() {};
void SetIsEnum( bool s ) { m_isEnum = s; }
bool IsEnum() const { return m_isEnum; }
void SetType( LIBEVAL::VAR_TYPE_T type ) { m_type = type; }
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LIBEVAL::VAR_TYPE_T GetType() const override { return m_type; }
void AddAllowedClass( TYPE_ID type_hash, PROPERTY_BASE* prop )
{
m_matchingTypes[type_hash] = prop;
}
virtual LIBEVAL::VALUE GetValue( LIBEVAL::CONTEXT* aCtx ) override;
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BOARD_ITEM* GetObject( const LIBEVAL::CONTEXT* aCtx ) const;
private:
std::unordered_map<TYPE_ID, PROPERTY_BASE*> m_matchingTypes;
int m_itemIndex;
LIBEVAL::VAR_TYPE_T m_type;
bool m_isEnum;
};
class PCB_EXPR_BUILTIN_FUNCTIONS
{
public:
PCB_EXPR_BUILTIN_FUNCTIONS();
static PCB_EXPR_BUILTIN_FUNCTIONS& Instance()
{
static PCB_EXPR_BUILTIN_FUNCTIONS self;
return self;
}
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LIBEVAL::FUNC_CALL_REF Get( const wxString &name )
{
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return m_funcs[ name ];
}
const wxArrayString GetSignatures() const
{
return m_funcSigs;
}
void RegisterFunc( const wxString& funcSignature, LIBEVAL::FUNC_CALL_REF funcPtr )
{
wxString funcName = funcSignature.BeforeFirst( '(' );
m_funcs[std::string( funcName.Lower() )] = std::move( funcPtr );
m_funcSigs.Add( funcSignature );
}
void RegisterAllFunctions();
private:
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std::map<wxString, LIBEVAL::FUNC_CALL_REF> m_funcs;
wxArrayString m_funcSigs;
};
class PCB_EXPR_COMPILER : public LIBEVAL::COMPILER
{
public:
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PCB_EXPR_COMPILER();
};
class PCB_EXPR_EVALUATOR
{
public:
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PCB_EXPR_EVALUATOR( );
~PCB_EXPR_EVALUATOR();
bool Evaluate( const wxString& aExpr );
int Result() const { return m_result; }
void SetErrorCallback( std::function<void( const wxString& aMessage, int aOffset )> aCallback )
{
m_compiler.SetErrorCallback( aCallback );
}
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bool IsErrorPending() const { return m_errorStatus.pendingError; }
const LIBEVAL::ERROR_STATUS& GetError() const { return m_errorStatus; }
private:
int m_result;
PCB_EXPR_COMPILER m_compiler;
PCB_EXPR_UCODE m_ucode;
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LIBEVAL::ERROR_STATUS m_errorStatus;
};
#endif