1 #ifndef OSMIUM_GEOM_WKB_HPP 2 #define OSMIUM_GEOM_WKB_HPP 63 inline void str_push(std::string& str, T data) {
64 str.append(reinterpret_cast<const char*>(&data),
sizeof(T));
67 inline std::string convert_to_hex(
const std::string& str) {
68 static const char* lookup_hex =
"0123456789ABCDEF";
70 out.reserve(str.size() * 2);
73 out += lookup_hex[(c >> 4) & 0xf];
74 out += lookup_hex[c & 0xf];
80 class WKBFactoryImpl {
89 enum wkbGeometryType : uint32_t {
94 wkbMultiLineString = 5,
96 wkbGeometryCollection = 7,
105 enum class wkb_byte_order_type : uint8_t {
111 uint32_t m_points = 0;
116 std::size_t m_linestring_size_offset = 0;
117 std::size_t m_polygons = 0;
118 std::size_t m_rings = 0;
119 std::size_t m_multipolygon_size_offset = 0;
120 std::size_t m_polygon_size_offset = 0;
121 std::size_t m_ring_size_offset = 0;
123 std::size_t header(std::string& str, wkbGeometryType
type,
bool add_length)
const {
124 #if __BYTE_ORDER == __LITTLE_ENDIAN 125 str_push(str, wkb_byte_order_type::NDR);
127 str_push(str, wkb_byte_order_type::XDR);
130 str_push(str, type | wkbSRID);
131 str_push(str, m_srid);
135 const std::size_t offset = str.size();
137 str_push(str, static_cast<uint32_t>(0));
142 void set_size(
const std::size_t offset,
const std::size_t size) {
143 uint32_t s = static_cast_with_assert<uint32_t>(size);
144 std::copy_n(reinterpret_cast<char*>(&s),
sizeof(uint32_t), &m_data[offset]);
149 using point_type = std::string;
150 using linestring_type = std::string;
151 using polygon_type = std::string;
152 using multipolygon_type = std::string;
153 using ring_type = std::string;
165 header(data, wkbPoint,
false);
166 str_push(data, xy.
x);
167 str_push(data, xy.
y);
170 return convert_to_hex(data);
178 void linestring_start() {
180 m_linestring_size_offset = header(m_data, wkbLineString,
true);
184 str_push(m_data, xy.
x);
185 str_push(m_data, xy.
y);
188 linestring_type linestring_finish(std::size_t num_points) {
189 set_size(m_linestring_size_offset, num_points);
196 return convert_to_hex(data);
204 void multipolygon_start() {
207 m_multipolygon_size_offset = header(m_data, wkbMultiPolygon,
true);
210 void multipolygon_polygon_start() {
213 m_polygon_size_offset = header(m_data, wkbPolygon,
true);
216 void multipolygon_polygon_finish() {
217 set_size(m_polygon_size_offset, m_rings);
220 void multipolygon_outer_ring_start() {
223 m_ring_size_offset = m_data.size();
224 str_push(m_data, static_cast<uint32_t>(0));
227 void multipolygon_outer_ring_finish() {
228 set_size(m_ring_size_offset, m_points);
231 void multipolygon_inner_ring_start() {
234 m_ring_size_offset = m_data.size();
235 str_push(m_data, static_cast<uint32_t>(0));
238 void multipolygon_inner_ring_finish() {
239 set_size(m_ring_size_offset, m_points);
243 str_push(m_data, xy.
x);
244 str_push(m_data, xy.
y);
248 multipolygon_type multipolygon_finish() {
249 set_size(m_multipolygon_size_offset, m_polygons);
256 return convert_to_hex(data);
266 template <
typename TProjection = IdentityProjection>
273 #endif // OSMIUM_GEOM_WKB_HPP double y
Definition: coordinates.hpp:51
Definition: factory.hpp:148
type
Definition: entity_bits.hpp:63
void swap(Buffer &lhs, Buffer &rhs)
Definition: buffer.hpp:762
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
Definition: coordinates.hpp:48
wkb_type
Definition: wkb.hpp:50
out_type
Definition: wkb.hpp:55
double x
Definition: coordinates.hpp:50