wkt x3 - add missing file

src/wkt/wkt_factory.cpp

@@ -0,0 +1,47 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2016 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
+ *
+ *****************************************************************************/
+
+// mapnik
+#include <mapnik/wkt/wkt_factory.hpp>
+#include <mapnik/wkt/wkt_grammar_x3.hpp>
+
+namespace mapnik {
+
+bool from_wkt(std::string const& wkt, mapnik::geometry::geometry<double> & geom)
+{
+    using namespace boost::spirit;
+    x3::ascii::space_type space;
+    std::string::const_iterator itr = wkt.begin();
+    std::string::const_iterator end =  wkt.end();
+    bool result;
+    try
+    {
+        result  = x3::phrase_parse(itr, end, wkt_grammar(), space, geom);
+    }
+    catch (x3::expectation_failure<std::string::const_iterator> const& ex)
+    {
+        return false;
+    }
+    return result && itr==end;
+}
+
+}