90 lines
2.7 KiB
C++
90 lines
2.7 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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#ifndef MAPNIK_PYTHON_BINDING_VALUE_CONVERTER_INCLUDED
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#define MAPNIK_PYTHON_BINDING_VALUE_CONVERTER_INCLUDED
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// mapnik
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#include <mapnik/value.hpp>
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#include <mapnik/util/variant.hpp>
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// boost
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#include <boost/python.hpp>
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#include <boost/implicit_cast.hpp>
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namespace boost { namespace python {
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struct value_converter : public mapnik::util::static_visitor<PyObject*>
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{
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PyObject * operator() (mapnik::value_integer val) const
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{
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return ::PyLong_FromLongLong(val);
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}
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PyObject * operator() (mapnik::value_double val) const
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{
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return ::PyFloat_FromDouble(val);
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}
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PyObject * operator() (mapnik::value_bool val) const
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{
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return ::PyBool_FromLong(val);
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}
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PyObject * operator() (std::string const& s) const
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{
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return ::PyUnicode_DecodeUTF8(s.c_str(),implicit_cast<ssize_t>(s.length()),0);
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}
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PyObject * operator() (mapnik::value_unicode_string const& s) const
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{
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std::string buffer;
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mapnik::to_utf8(s,buffer);
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return ::PyUnicode_DecodeUTF8(buffer.c_str(),implicit_cast<ssize_t>(buffer.length()),0);
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}
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PyObject * operator() (mapnik::value_null const& /*s*/) const
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{
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Py_RETURN_NONE;
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}
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};
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struct mapnik_value_to_python
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{
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static PyObject* convert(mapnik::value const& v)
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{
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return mapnik::util::apply_visitor(value_converter(),v.base());
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}
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};
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struct mapnik_param_to_python
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{
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static PyObject* convert(mapnik::value_holder const& v)
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{
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return mapnik::util::apply_visitor(value_converter(),v);
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}
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};
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}}
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#endif // MAPNIK_PYTHON_BINDING_VALUE_CONVERTER_INCLUDED
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