77 lines
2.6 KiB
C++
77 lines
2.6 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) 2015 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/image_options.hpp>
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore.hpp>
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#include <boost/spirit/include/qi.hpp>
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#include <boost/fusion/include/std_pair.hpp>
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#pragma GCC diagnostic pop
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namespace mapnik { namespace detail {
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namespace qi = boost::spirit::qi;
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template <typename Iterator>
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struct image_options_grammar
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: qi::grammar<Iterator, image_options_map(), boost::spirit::ascii::space_type>
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{
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using pair_type = std::pair<std::string, boost::optional<std::string>>;
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image_options_grammar()
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: image_options_grammar::base_type(start)
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{
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qi::lit_type lit;
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qi::char_type char_;
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start = pair >> *(lit(':') >> pair)
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;
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pair = key >> -('=' >> value)
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;
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key = char_("a-zA-Z_") >> *char_("a-zA-Z_0-9\\.\\-")
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;
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value = +char_("a-zA-Z_0-9\\.\\-")
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;
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}
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qi::rule<Iterator, image_options_map(), boost::spirit::ascii::space_type> start;
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qi::rule<Iterator, pair_type(), boost::spirit::ascii::space_type> pair;
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qi::rule<Iterator, std::string(), boost::spirit::ascii::space_type> key, value;
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};
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} // ns detail
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image_options_map parse_image_options(std::string const& str)
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{
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auto const begin = str.begin();
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auto const end = str.end();
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boost::spirit::ascii::space_type space;
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mapnik::detail::image_options_grammar<std::string::const_iterator> g;
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image_options_map options;
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bool success = boost::spirit::qi::phrase_parse(begin, end, g, space, options);
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if (!success)
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{
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throw std::runtime_error("Can't parse image options: " + str);
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}
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return options; // RVO
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}
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} // ns mapnik
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