149 lines
4.7 KiB
C++
149 lines
4.7 KiB
C++
#ifndef OSMIUM_GEOM_WKT_HPP
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#define OSMIUM_GEOM_WKT_HPP
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/*
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This file is part of Osmium (http://osmcode.org/libosmium).
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Copyright 2013,2014 Jochen Topf <jochen@topf.org> and others (see README).
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <cassert>
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#include <cstddef>
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#include <string>
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#include <utility>
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#include <osmium/geom/coordinates.hpp>
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#include <osmium/geom/factory.hpp>
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namespace osmium {
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namespace geom {
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namespace detail {
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class WKTFactoryImpl {
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std::string m_str;
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int m_precision;
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public:
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typedef std::string point_type;
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typedef std::string linestring_type;
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typedef std::string polygon_type;
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typedef std::string multipolygon_type;
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typedef std::string ring_type;
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WKTFactoryImpl(int precision = 7) :
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m_precision(precision) {
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}
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/* Point */
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point_type make_point(const osmium::geom::Coordinates& xy) const {
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std::string str {"POINT"};
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xy.append_to_string(str, '(', ' ', ')', m_precision);
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return str;
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}
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/* LineString */
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void linestring_start() {
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m_str = "LINESTRING(";
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}
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void linestring_add_location(const osmium::geom::Coordinates& xy) {
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xy.append_to_string(m_str, ' ', m_precision);
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m_str += ',';
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}
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linestring_type linestring_finish(size_t /* num_points */) {
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assert(!m_str.empty());
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std::string str;
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std::swap(str, m_str);
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str.back() = ')';
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return str;
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}
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/* MultiPolygon */
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void multipolygon_start() {
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m_str = "MULTIPOLYGON(";
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}
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void multipolygon_polygon_start() {
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m_str += '(';
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}
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void multipolygon_polygon_finish() {
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m_str += "),";
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}
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void multipolygon_outer_ring_start() {
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m_str += '(';
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}
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void multipolygon_outer_ring_finish() {
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assert(!m_str.empty());
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m_str.back() = ')';
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}
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void multipolygon_inner_ring_start() {
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m_str += ",(";
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}
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void multipolygon_inner_ring_finish() {
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assert(!m_str.empty());
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m_str.back() = ')';
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}
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void multipolygon_add_location(const osmium::geom::Coordinates& xy) {
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xy.append_to_string(m_str, ' ', m_precision);
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m_str += ',';
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}
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multipolygon_type multipolygon_finish() {
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assert(!m_str.empty());
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m_str.back() = ')';
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return std::move(m_str);
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}
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}; // class WKTFactoryImpl
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} // namespace detail
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template <class TProjection = IdentityProjection>
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using WKTFactory = GeometryFactory<osmium::geom::detail::WKTFactoryImpl, TProjection>;
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} // namespace geom
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} // namespace osmium
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#endif // OSMIUM_GEOM_WKT_HPP
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