/usr/include/osmium/area/multipolygon_collector.hpp is in libosmium2-dev 2.11.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 | #ifndef OSMIUM_AREA_MULTIPOLYGON_COLLECTOR_HPP
#define OSMIUM_AREA_MULTIPOLYGON_COLLECTOR_HPP
/*
This file is part of Osmium (http://osmcode.org/libosmium).
Copyright 2013-2017 Jochen Topf <jochen@topf.org> and others (see README).
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#include <algorithm>
#include <cstddef>
#include <cstring>
#include <vector>
#include <osmium/area/stats.hpp>
#include <osmium/memory/buffer.hpp>
#include <osmium/osm/item_type.hpp>
#include <osmium/osm/location.hpp>
#include <osmium/osm/node_ref.hpp>
#include <osmium/osm/relation.hpp>
#include <osmium/osm/tag.hpp>
#include <osmium/osm/way.hpp>
#include <osmium/relations/collector.hpp>
namespace osmium {
namespace relations {
class RelationMeta;
} // namespace relations
/**
* @brief Code related to the building of areas (multipolygons) from relations.
*/
namespace area {
/**
* This class collects all data needed for creating areas from
* relations tagged with type=multipolygon or type=boundary.
* Most of its functionality is derived from the parent class
* osmium::relations::Collector.
*
* The actual assembling of the areas is done by the assembler
* class given as template argument.
*
* @tparam TAssembler Multipolygon Assembler class.
* @pre The Ids of all objects must be unique in the input data.
*/
template <typename TAssembler>
class MultipolygonCollector : public osmium::relations::Collector<MultipolygonCollector<TAssembler>, false, true, false> {
using collector_type = osmium::relations::Collector<MultipolygonCollector<TAssembler>, false, true, false>;
using assembler_config_type = typename TAssembler::config_type;
const assembler_config_type m_assembler_config;
osmium::memory::Buffer m_output_buffer;
osmium::area::area_stats m_stats;
static constexpr size_t initial_output_buffer_size = 1024 * 1024;
static constexpr size_t max_buffer_size_for_flush = 100 * 1024;
void flush_output_buffer() {
if (this->callback()) {
osmium::memory::Buffer buffer{initial_output_buffer_size};
using std::swap;
swap(buffer, m_output_buffer);
this->callback()(std::move(buffer));
}
}
void possibly_flush_output_buffer() {
if (m_output_buffer.committed() > max_buffer_size_for_flush) {
flush_output_buffer();
}
}
public:
explicit MultipolygonCollector(const assembler_config_type& assembler_config) :
collector_type(),
m_assembler_config(assembler_config),
m_output_buffer(initial_output_buffer_size, osmium::memory::Buffer::auto_grow::yes) {
}
const osmium::area::area_stats& stats() const noexcept {
return m_stats;
}
/**
* We are interested in all relations tagged with type=multipolygon
* or type=boundary.
*
* Overwritten from the base class.
*/
bool keep_relation(const osmium::Relation& relation) const {
const char* type = relation.tags().get_value_by_key("type");
// ignore relations without "type" tag
if (!type) {
return false;
}
if ((!std::strcmp(type, "multipolygon")) || (!std::strcmp(type, "boundary"))) {
return true;
}
return false;
}
/**
* Overwritten from the base class.
*/
bool keep_member(const osmium::relations::RelationMeta& /*relation_meta*/, const osmium::RelationMember& member) const {
// We are only interested in members of type way.
return member.type() == osmium::item_type::way;
}
/**
* This is called when a way is not in any multipolygon
* relation.
*
* Overwritten from the base class.
*/
void way_not_in_any_relation(const osmium::Way& way) {
// you need at least 4 nodes to make up a polygon
if (way.nodes().size() <= 3) {
return;
}
try {
if (!way.nodes().front().location() || !way.nodes().back().location()) {
throw osmium::invalid_location("invalid location");
}
if (way.ends_have_same_location()) {
// way is closed and has enough nodes, build simple multipolygon
TAssembler assembler(m_assembler_config);
assembler(way, m_output_buffer);
m_stats += assembler.stats();
possibly_flush_output_buffer();
}
} catch (const osmium::invalid_location&) {
// XXX ignore
}
}
void complete_relation(osmium::relations::RelationMeta& relation_meta) {
const osmium::Relation& relation = this->get_relation(relation_meta);
const osmium::memory::Buffer& buffer = this->members_buffer();
std::vector<const osmium::Way*> ways;
for (const auto& member : relation.members()) {
if (member.ref() != 0) {
const size_t offset = this->get_offset(member.type(), member.ref());
ways.push_back(&buffer.get<const osmium::Way>(offset));
}
}
try {
TAssembler assembler(m_assembler_config);
assembler(relation, ways, m_output_buffer);
m_stats += assembler.stats();
possibly_flush_output_buffer();
} catch (const osmium::invalid_location&) {
// XXX ignore
}
}
void flush() {
flush_output_buffer();
}
osmium::memory::Buffer read() {
osmium::memory::Buffer buffer{initial_output_buffer_size, osmium::memory::Buffer::auto_grow::yes};
using std::swap;
swap(buffer, m_output_buffer);
return buffer;
}
}; // class MultipolygonCollector
} // namespace area
} // namespace osmium
#endif // OSMIUM_AREA_MULTIPOLYGON_COLLECTOR_HPP
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