altium_rule_transformer.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2021 Thomas Pointhuber <[email protected]>
 * Copyright (C) 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 "altium_rule_transformer.h"

#include <iostream>
#include <wx/wxcrt.h> // for wxIsspace

const ALTIUM_RULE_TOKEN& ALTIUM_RULE_TOKENIZER::Next()
{
 m_currentToken = m_nextToken;

 // skip whitespaces
 for( ; m_it != m_expr.end() && wxIsspace( curChar() ); nextChar() )
 ;

 // check for end of string
 if( m_it == m_expr.end() )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::END_OF_EXPR, m_pos };
 return m_currentToken;
 }

 const size_t startPos = m_pos;
 const wxUniChar curCh = curChar();
 wxUniChar nextCh = nextChar();

 if( curCh == '(' )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::LPAR, startPos };
 return m_currentToken;
 }
 else if( curCh == ')' )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::RPAR, startPos };
 return m_currentToken;
 }
 else if( curCh == '*' )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::MUL, startPos };
 return m_currentToken;
 }
 else if( curCh == '/' )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::DIV, startPos };
 return m_currentToken;
 }
 else if( curCh == '=' )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::EQUAL, startPos };
 return m_currentToken;
 }
 else if( curCh == '<' )
 {
 if( nextCh == '=' )
 {
 nextChar();
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::LESS_EQUAL, startPos };
 }
 else if( nextCh == '>' )
 {
 nextChar();
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::NOT_EQUAL, startPos };
 }
 else
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::LESS, startPos };
 }
 return m_currentToken;
 }
 else if( curCh == '>' )
 {
 if( nextCh == '=' )
 {
 nextChar();
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::GREATER_EQUAL, startPos };
 }
 else
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::GREATER, startPos };
 }
 return m_currentToken;
 }
 else if( curCh == '&' && nextCh == '&' )
 {
 nextChar();
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::LOW_AND, startPos };
 return m_currentToken;
 }
 else if( curCh == '|' && nextCh == '|' )
 {
 nextChar();
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::LOW_OR, startPos };
 return m_currentToken;
 }
 else if( curCh == '\'' )
 {
 std::cout << "start const string" << std::endl;
 wxString constString;
 while( m_it != m_expr.end() && nextCh != '\'' )
 {
 constString += nextCh; // TODO: escaping?
 nextCh = nextChar();
 }
 std::cout << "end const string: " << constString << std::endl;

 if( m_it != m_expr.end() )
 {
 nextChar(); // TODO: exception if EOF reached?
 }

 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::CONST_STRING, startPos, constString };
 return m_currentToken;
 }
 else if( curCh == '+' && !wxIsdigit( nextCh ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::ADD, startPos };
 return m_currentToken;
 }
 else if( curCh == '-' && !wxIsdigit( nextCh ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::SUB, startPos };
 return m_currentToken;
 }
 else if( curCh == '+' || curCh == '-' || wxIsdigit( curCh ) )
 {
 wxString digitString = curCh;
 while( wxIsdigit( nextCh ) )
 {
 digitString += nextCh;
 nextCh = nextChar();
 }

 long value;
 digitString.ToLong( &value ); // TODO: check return value

 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::CONST_INT, startPos, value };
 return m_currentToken;
 }
 else
 {
 wxString identString = curCh;
 while( wxIsalnum( nextCh ) )
 {
 identString += nextCh;
 nextCh = nextChar();
 }

 if( identString.IsSameAs( "True", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::CONST_TRUE, startPos };
 }
 else if( identString.IsSameAs( "False", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::CONST_FALSE, startPos };
 }
 else if( identString.IsSameAs( "Div", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::INTEGRAL_DIV, startPos };
 }
 else if( identString.IsSameAs( "Mod", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::MOD, startPos };
 }
 else if( identString.IsSameAs( "And", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::AND, startPos };
 }
 else if( identString.IsSameAs( "Or", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::OR, startPos };
 }
 else if( identString.IsSameAs( "Xor", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::XOR, startPos };
 }
 else if( identString.IsSameAs( "Not", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::NOT, startPos };
 }
 else if( identString.IsSameAs( "Between", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::BETWEEN, startPos };
 }
 else if( identString.IsSameAs( "Like", false ) )
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::LIKE, startPos };
 }
 else
 {
 m_nextToken = { ALTIUM_RULE_TOKEN_KIND::IDENT, startPos, identString };
 }

 return m_currentToken;
 }
}

const ALTIUM_RULE_TOKEN& ALTIUM_RULE_TOKENIZER::Peek() const
{
 return m_nextToken;
}