67 lines
2.4 KiB
C++
67 lines
2.4 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) 2021 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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#include <mapnik/transform/parse_transform.hpp>
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#include <mapnik/transform/transform_expression_grammar_x3.hpp>
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#include <mapnik/expression_grammar_x3_config.hpp> // transcoder_tag
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#include <mapnik/config_error.hpp>
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// stl
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#include <string>
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#include <stdexcept>
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namespace mapnik {
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transform_list_ptr parse_transform(std::string const& str, std::string const& encoding)
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{
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using boost::spirit::x3::ascii::space;
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transform_list_ptr trans_list = std::make_shared<transform_list>();
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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::transcoder const tr(encoding);
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#if BOOST_VERSION >= 106700
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auto const parser = boost::spirit::x3::with<mapnik::grammar::transcoder_tag>(tr)[mapnik::grammar::transform];
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#else
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auto const parser =
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boost::spirit::x3::with<mapnik::grammar::transcoder_tag>(std::ref(tr))[mapnik::grammar::transform];
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#endif
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bool status = false;
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try
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{
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status = boost::spirit::x3::phrase_parse(itr, end, parser, space, *trans_list);
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}
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catch (boost::spirit::x3::expectation_failure<std::string::const_iterator> const& ex)
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{
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throw config_error("Failed to parse transform expression: \"" + str + "\"");
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}
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if (status && itr == end)
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{
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return trans_list;
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}
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else
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{
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throw std::runtime_error("Failed to parse transform: \"" + str + "\"");
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}
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}
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} // namespace mapnik
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