/usr/include/boost/geometry/io/wkt/write.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
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// 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_IO_WKT_WRITE_HPP
#define BOOST_GEOMETRY_IO_WKT_WRITE_HPP
#include <ostream>
#include <string>
#include <boost/array.hpp>
#include <boost/range.hpp>
#include <boost/typeof/typeof.hpp>
#include <boost/geometry/algorithms/assign.hpp>
#include <boost/geometry/algorithms/convert.hpp>
#include <boost/geometry/algorithms/not_implemented.hpp>
#include <boost/geometry/core/exterior_ring.hpp>
#include <boost/geometry/core/interior_rings.hpp>
#include <boost/geometry/core/ring_type.hpp>
#include <boost/geometry/geometries/concepts/check.hpp>
#include <boost/geometry/geometries/ring.hpp>
#include <boost/geometry/io/wkt/detail/prefix.hpp>
#include <boost/variant/apply_visitor.hpp>
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/variant_fwd.hpp>
namespace boost { namespace geometry
{
// Silence warning C4512: 'boost::geometry::wkt_manipulator<Geometry>' : assignment operator could not be generated
#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable : 4512)
#endif
#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace wkt
{
template <typename P, int I, int Count>
struct stream_coordinate
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os, P const& p)
{
os << (I > 0 ? " " : "") << get<I>(p);
stream_coordinate<P, I + 1, Count>::apply(os, p);
}
};
template <typename P, int Count>
struct stream_coordinate<P, Count, Count>
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>&, P const&)
{}
};
struct prefix_linestring_par
{
static inline const char* apply() { return "LINESTRING("; }
};
struct prefix_ring_par_par
{
// Note, double parentheses are intentional, indicating WKT ring begin/end
static inline const char* apply() { return "POLYGON(("; }
};
struct opening_parenthesis
{
static inline const char* apply() { return "("; }
};
struct closing_parenthesis
{
static inline const char* apply() { return ")"; }
};
struct double_closing_parenthesis
{
static inline const char* apply() { return "))"; }
};
/*!
\brief Stream points as \ref WKT
*/
template <typename Point, typename Policy>
struct wkt_point
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os, Point const& p)
{
os << Policy::apply() << "(";
stream_coordinate<Point, 0, dimension<Point>::type::value>::apply(os, p);
os << ")";
}
};
/*!
\brief Stream ranges as WKT
\note policy is used to stream prefix/postfix, enabling derived classes to override this
*/
template <typename Range, typename PrefixPolicy, typename SuffixPolicy>
struct wkt_range
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
Range const& range)
{
typedef typename boost::range_iterator<Range const>::type iterator_type;
bool first = true;
os << PrefixPolicy::apply();
// TODO: check EMPTY here
for (iterator_type it = boost::begin(range);
it != boost::end(range);
++it)
{
os << (first ? "" : ",");
stream_coordinate
<
point_type, 0, dimension<point_type>::type::value
>::apply(os, *it);
first = false;
}
os << SuffixPolicy::apply();
}
private:
typedef typename boost::range_value<Range>::type point_type;
};
/*!
\brief Stream sequence of points as WKT-part, e.g. (1 2),(3 4)
\note Used in polygon, all multi-geometries
*/
template <typename Range>
struct wkt_sequence
: wkt_range
<
Range,
opening_parenthesis,
closing_parenthesis
>
{};
template <typename Polygon, typename PrefixPolicy>
struct wkt_poly
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
Polygon const& poly)
{
typedef typename ring_type<Polygon const>::type ring;
os << PrefixPolicy::apply();
// TODO: check EMPTY here
os << "(";
wkt_sequence<ring>::apply(os, exterior_ring(poly));
typename interior_return_type<Polygon const>::type rings
= interior_rings(poly);
for (BOOST_AUTO_TPL(it, boost::begin(rings)); it != boost::end(rings); ++it)
{
os << ",";
wkt_sequence<ring>::apply(os, *it);
}
os << ")";
}
};
template <typename Box>
struct wkt_box
{
typedef typename point_type<Box>::type point_type;
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
Box const& box)
{
// Convert to ring, then stream
typedef model::ring<point_type> ring_type;
ring_type ring;
geometry::convert(box, ring);
os << "POLYGON(";
wkt_sequence<ring_type>::apply(os, ring);
os << ")";
}
private:
inline wkt_box()
{
// Only streaming of boxes with two dimensions is support, otherwise it is a polyhedron!
//assert_dimension<B, 2>();
}
};
template <typename Segment>
struct wkt_segment
{
typedef typename point_type<Segment>::type point_type;
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
Segment const& segment)
{
// Convert to two points, then stream
typedef boost::array<point_type, 2> sequence;
sequence points;
geometry::detail::assign_point_from_index<0>(segment, points[0]);
geometry::detail::assign_point_from_index<1>(segment, points[1]);
// In Boost.Geometry a segment is represented
// in WKT-format like (for 2D): LINESTRING(x y,x y)
os << "LINESTRING";
wkt_sequence<sequence>::apply(os, points);
}
private:
inline wkt_segment()
{}
};
}} // namespace detail::wkt
#endif // DOXYGEN_NO_DETAIL
#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{
template <typename Geometry, typename Tag = typename tag<Geometry>::type>
struct wkt: not_implemented<Tag>
{};
template <typename Point>
struct wkt<Point, point_tag>
: detail::wkt::wkt_point
<
Point,
detail::wkt::prefix_point
>
{};
template <typename Linestring>
struct wkt<Linestring, linestring_tag>
: detail::wkt::wkt_range
<
Linestring,
detail::wkt::prefix_linestring_par,
detail::wkt::closing_parenthesis
>
{};
/*!
\brief Specialization to stream a box as WKT
\details A "box" does not exist in WKT.
It is therefore streamed as a polygon
*/
template <typename Box>
struct wkt<Box, box_tag>
: detail::wkt::wkt_box<Box>
{};
template <typename Segment>
struct wkt<Segment, segment_tag>
: detail::wkt::wkt_segment<Segment>
{};
/*!
\brief Specialization to stream a ring as WKT
\details A ring or "linear_ring" does not exist in WKT.
A ring is equivalent to a polygon without inner rings
It is therefore streamed as a polygon
*/
template <typename Ring>
struct wkt<Ring, ring_tag>
: detail::wkt::wkt_range
<
Ring,
detail::wkt::prefix_ring_par_par,
detail::wkt::double_closing_parenthesis
>
{};
/*!
\brief Specialization to stream polygon as WKT
*/
template <typename Polygon>
struct wkt<Polygon, polygon_tag>
: detail::wkt::wkt_poly
<
Polygon,
detail::wkt::prefix_polygon
>
{};
template <typename Geometry>
struct devarianted_wkt
{
template <typename OutputStream>
static inline void apply(OutputStream& os, Geometry const& geometry)
{
wkt<Geometry>::apply(os, geometry);
}
};
template <BOOST_VARIANT_ENUM_PARAMS(typename T)>
struct devarianted_wkt<variant<BOOST_VARIANT_ENUM_PARAMS(T)> >
{
template <typename OutputStream>
struct visitor: static_visitor<void>
{
OutputStream& m_os;
visitor(OutputStream& os)
: m_os(os)
{}
template <typename Geometry>
inline void operator()(Geometry const& geometry) const
{
devarianted_wkt<Geometry>::apply(m_os, geometry);
}
};
template <typename OutputStream>
static inline void apply(
OutputStream& os,
variant<BOOST_VARIANT_ENUM_PARAMS(T)> const& geometry
)
{
apply_visitor(visitor<OutputStream>(os), geometry);
}
};
} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH
/*!
\brief Generic geometry template manipulator class, takes corresponding output class from traits class
\ingroup wkt
\details Stream manipulator, streams geometry classes as \ref WKT streams
\par Example:
Small example showing how to use the wkt class
\dontinclude doxygen_1.cpp
\skip example_as_wkt_point
\line {
\until }
*/
template <typename Geometry>
class wkt_manipulator
{
public:
inline wkt_manipulator(Geometry const& g)
: m_geometry(g)
{}
template <typename Char, typename Traits>
inline friend std::basic_ostream<Char, Traits>& operator<<(
std::basic_ostream<Char, Traits>& os,
wkt_manipulator const& m)
{
dispatch::devarianted_wkt<Geometry>::apply(os, m.m_geometry);
os.flush();
return os;
}
private:
Geometry const& m_geometry;
};
/*!
\brief Main WKT-streaming function
\ingroup wkt
\par Example:
Small example showing how to use the wkt helper function
\dontinclude doxygen_1.cpp
\skip example_as_wkt_vector
\line {
\until }
*/
template <typename Geometry>
inline wkt_manipulator<Geometry> wkt(Geometry const& geometry)
{
concept::check<Geometry const>();
return wkt_manipulator<Geometry>(geometry);
}
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_IO_WKT_WRITE_HPP
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