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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
// Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
// Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_MULTI_IO_WKT_READ_MULTI_HPP
#define BOOST_GEOMETRY_MULTI_IO_WKT_READ_MULTI_HPP
#include <string>
#include <boost/geometry/core/mutable_range.hpp>
#include <boost/geometry/multi/core/tags.hpp>
#include <boost/geometry/multi/core/point_type.hpp>
#include <boost/geometry/multi/io/wkt/detail/prefix.hpp>
#include <boost/geometry/io/wkt/read.hpp>
namespace boost { namespace geometry
{
namespace detail { namespace wkt
{
template <typename MultiGeometry, template<typename> class Parser, typename PrefixPolicy>
struct multi_parser
{
static inline void apply(std::string const& wkt, MultiGeometry& geometry)
{
traits::clear<MultiGeometry>::apply(geometry);
tokenizer tokens(wkt, boost::char_separator<char>(" ", ",()"));
tokenizer::iterator it;
if (initialize<MultiGeometry>(tokens, PrefixPolicy::apply(), wkt, it))
{
handle_open_parenthesis(it, tokens.end(), wkt);
// Parse sub-geometries
while(it != tokens.end() && *it != ")")
{
traits::resize<MultiGeometry>::apply(geometry, boost::size(geometry) + 1);
Parser
<
typename boost::range_value<MultiGeometry>::type
>::apply(it, tokens.end(), wkt, geometry.back());
if (it != tokens.end() && *it == ",")
{
// Skip "," after multi-element is parsed
++it;
}
}
handle_close_parenthesis(it, tokens.end(), wkt);
}
check_end(it, tokens.end(), wkt);
}
};
template <typename P>
struct noparenthesis_point_parser
{
static inline void apply(tokenizer::iterator& it, tokenizer::iterator end,
std::string const& wkt, P& point)
{
parsing_assigner<P, 0, dimension<P>::value>::apply(it, end, point, wkt);
}
};
template <typename MultiGeometry, typename PrefixPolicy>
struct multi_point_parser
{
static inline void apply(std::string const& wkt, MultiGeometry& geometry)
{
traits::clear<MultiGeometry>::apply(geometry);
tokenizer tokens(wkt, boost::char_separator<char>(" ", ",()"));
tokenizer::iterator it;
if (initialize<MultiGeometry>(tokens, PrefixPolicy::apply(), wkt, it))
{
handle_open_parenthesis(it, tokens.end(), wkt);
// If first point definition starts with "(" then parse points as (x y)
// otherwise as "x y"
bool using_brackets = (it != tokens.end() && *it == "(");
while(it != tokens.end() && *it != ")")
{
traits::resize<MultiGeometry>::apply(geometry, boost::size(geometry) + 1);
if (using_brackets)
{
point_parser
<
typename boost::range_value<MultiGeometry>::type
>::apply(it, tokens.end(), wkt, geometry.back());
}
else
{
noparenthesis_point_parser
<
typename boost::range_value<MultiGeometry>::type
>::apply(it, tokens.end(), wkt, geometry.back());
}
if (it != tokens.end() && *it == ",")
{
// Skip "," after point is parsed
++it;
}
}
handle_close_parenthesis(it, tokens.end(), wkt);
}
check_end(it, tokens.end(), wkt);
}
};
}} // namespace detail::wkt
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template <typename MultiGeometry>
struct read_wkt<multi_point_tag, MultiGeometry>
: detail::wkt::multi_point_parser
<
MultiGeometry,
detail::wkt::prefix_multipoint
>
{};
template <typename MultiGeometry>
struct read_wkt<multi_linestring_tag, MultiGeometry>
: detail::wkt::multi_parser
<
MultiGeometry,
detail::wkt::linestring_parser,
detail::wkt::prefix_multilinestring
>
{};
template <typename MultiGeometry>
struct read_wkt<multi_polygon_tag, MultiGeometry>
: detail::wkt::multi_parser
<
MultiGeometry,
detail::wkt::polygon_parser,
detail::wkt::prefix_multipolygon
>
{};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_MULTI_IO_WKT_READ_MULTI_HPP
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