add csv_grammar

include/mapnik/csv/csv_grammar.hpp

@@ -0,0 +1,78 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2014 Artem Pavlenko
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *****************************************************************************/
+
+
+//#define BOOST_SPIRIT_DEBUG
+
+#ifndef MAPNIK_CVS_GRAMMAR_HPP
+#define MAPNIK_CVS_GRAMMAR_HPP
+
+#include <boost/spirit/include/qi.hpp>
+
+namespace mapnik {
+
+namespace qi = boost::spirit::qi;
+using column  = std::string;
+using columns = std::vector<column>;
+using csv_line = columns;
+using csv_data = std::vector<csv_line>;
+
+template <typename Iterator>
+struct csv_line_grammar : qi::grammar<Iterator, csv_line(char), qi::blank_type>
+{
+    csv_line_grammar() : csv_line_grammar::base_type(line)
+    {
+        using namespace qi;
+        line   = column(_r1) % char_(_r1)
+            ;
+        column = quoted | *(char_ - (lit(_r1) | eol))
+            ;
+        quoted = '"' >> *("\"\"" | ~char_('"')) >> '"'
+            ;
+        //http://stackoverflow.com/questions/7436481/how-to-make-my-split-work-only-on-one-real-line-and-be-capable-to-skeep-quoted-p/7462539#7462539
+        BOOST_SPIRIT_DEBUG_NODES((line)(column)(quoted));
+    }
+  private:
+    qi::rule<Iterator, csv_line(char), qi::blank_type> line;
+    qi::rule<Iterator, column(char)> column; // no-skip
+    qi::rule<Iterator, std::string()> quoted;
+};
+
+template <typename Iterator>
+struct csv_file_grammar : qi::grammar<Iterator, csv_data(char), qi::blank_type>
+{
+    csv_file_grammar() : csv_file_grammar::base_type(start)
+    {
+        using namespace qi;
+        start  = -line(_r1) % eol
+            ;
+        BOOST_SPIRIT_DEBUG_NODES((start));
+    }
+  private:
+    qi::rule<Iterator, csv_data(char), qi::blank_type> start;
+    csv_line_grammar<Iterator> line;
+};
+
+
+}
+
+#endif // MAPNIK_CVS_GRAMMAR_HPP