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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 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
*
*****************************************************************************/
#ifndef MAPNIK_PYTHON_BINDING_VALUE_CONVERTER_INCLUDED
#define MAPNIK_PYTHON_BINDING_VALUE_CONVERTER_INCLUDED
// mapnik
#include <mapnik/value.hpp>
// boost
#include <boost/python.hpp>
#include <boost/implicit_cast.hpp>
namespace boost { namespace python {
struct value_converter : public boost::static_visitor<PyObject*>
{
PyObject * operator() (mapnik::value_integer val) const
{
#if PY_VERSION_HEX >= 0x03000000
return ::PyLong_FromLong(val);
#else
return ::PyInt_FromLong(val);
#endif
}
PyObject * operator() (double val) const
{
return ::PyFloat_FromDouble(val);
}
PyObject * operator() (bool val) const
{
return ::PyBool_FromLong(val);
}
PyObject * operator() (std::string const& s) const
{
return ::PyUnicode_DecodeUTF8(s.c_str(),implicit_cast<ssize_t>(s.length()),0);
}
PyObject * operator() (mapnik::value_unicode_string const& s) const
{
std::string buffer;
mapnik::to_utf8(s,buffer);
return ::PyUnicode_DecodeUTF8(buffer.c_str(),implicit_cast<ssize_t>(buffer.length()),0);
}
PyObject * operator() (mapnik::value_null const& /*s*/) const
{
Py_RETURN_NONE;
}
};
struct mapnik_value_to_python
{
static PyObject* convert(mapnik::value const& v)
{
return boost::apply_visitor(value_converter(),v.base());
}
};
struct mapnik_param_to_python
{
static PyObject* convert(mapnik::value_holder const& v)
{
return boost::apply_visitor(value_converter(),v);
}
};
}
}
#endif // MAPNIK_PYTHON_BINDING_VALUE_CONVERTER_INCLUDED
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