73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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// mapnik
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#include <mapnik/expression.hpp>
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#include <mapnik/config_error.hpp>
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#include <mapnik/unicode.hpp>
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#include <mapnik/expression_grammar.hpp>
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// boost
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#include <boost/algorithm/string.hpp>
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#include <boost/make_shared.hpp>
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namespace mapnik
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{
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expression_ptr expression_factory::compile(std::string const& str,transcoder const& tr)
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{
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expression_ptr expr(boost::make_shared<expr_node>(true));
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std::string::const_iterator itr = str.begin();
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std::string::const_iterator end = str.end();
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mapnik::expression_grammar<std::string::const_iterator> g(tr);
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bool r = boost::spirit::qi::phrase_parse(itr,end,g, boost::spirit::standard_wide::space,*expr);
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if (r && itr==end)
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{
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return expr;
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}
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else
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{
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throw config_error( "Failed to parse expression: \"" + str + "\"" );
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}
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}
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bool expression_factory::parse_from_string(expression_ptr const& expr,
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std::string const& str,
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mapnik::expression_grammar<std::string::const_iterator> const& g)
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{
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std::string::const_iterator itr = str.begin();
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std::string::const_iterator end = str.end();
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bool r = boost::spirit::qi::phrase_parse(itr,end,g, boost::spirit::standard_wide::space,*expr);
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return (r && itr==end);
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}
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expression_ptr parse_expression (std::string const& wkt,std::string const& encoding)
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{
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transcoder tr(encoding);
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return expression_factory::compile(wkt,tr);
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}
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expression_ptr parse_expression (std::string const& wkt)
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{
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return parse_expression(wkt,"utf8");
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}
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}
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