1 #ifndef OSMIUM_GEOM_WKB_HPP 2 #define OSMIUM_GEOM_WKB_HPP 62 inline void str_push(std::string& str, T data) {
63 size_t size = str.size();
64 str.resize(size +
sizeof(T));
65 std::copy_n(reinterpret_cast<char*>(&data),
sizeof(T), &str[size]);
68 inline std::string convert_to_hex(
const std::string& str) {
69 static const char* lookup_hex =
"0123456789ABCDEF";
73 out += lookup_hex[(c >> 4) & 0xf];
74 out += lookup_hex[c & 0xf];
80 class WKBFactoryImpl {
83 static constexpr uint32_t srid = 4326;
92 enum wkbGeometryType : uint32_t {
97 wkbMultiLineString = 5,
99 wkbGeometryCollection = 7,
108 enum class wkb_byte_order_type : uint8_t {
114 uint32_t m_points {0};
118 size_t m_linestring_size_offset = 0;
119 size_t m_polygons = 0;
121 size_t m_multipolygon_size_offset = 0;
122 size_t m_polygon_size_offset = 0;
123 size_t m_ring_size_offset = 0;
125 size_t header(std::string& str, wkbGeometryType
type,
bool add_length)
const {
126 #if __BYTE_ORDER == __LITTLE_ENDIAN 127 str_push(str, wkb_byte_order_type::NDR);
129 str_push(str, wkb_byte_order_type::XDR);
132 str_push(str, type | wkbSRID);
137 size_t offset = str.size();
139 str_push(str, static_cast<uint32_t>(0));
144 void set_size(
const size_t offset,
const size_t size) {
145 uint32_t s = static_cast_with_assert<uint32_t>(size);
146 std::copy_n(reinterpret_cast<char*>(&s),
sizeof(uint32_t), &m_data[offset]);
151 using point_type = std::string;
152 using linestring_type = std::string;
153 using polygon_type = std::string;
154 using multipolygon_type = std::string;
155 using ring_type = std::string;
166 header(data, wkbPoint,
false);
167 str_push(data, xy.
x);
168 str_push(data, xy.
y);
171 return convert_to_hex(data);
179 void linestring_start() {
181 m_linestring_size_offset = header(m_data, wkbLineString,
true);
185 str_push(m_data, xy.
x);
186 str_push(m_data, xy.
y);
189 linestring_type linestring_finish(
size_t num_points) {
190 set_size(m_linestring_size_offset, num_points);
197 return convert_to_hex(data);
205 void multipolygon_start() {
208 m_multipolygon_size_offset = header(m_data, wkbMultiPolygon,
true);
211 void multipolygon_polygon_start() {
214 m_polygon_size_offset = header(m_data, wkbPolygon,
true);
217 void multipolygon_polygon_finish() {
218 set_size(m_polygon_size_offset, m_rings);
221 void multipolygon_outer_ring_start() {
224 m_ring_size_offset = m_data.size();
225 str_push(m_data, static_cast<uint32_t>(0));
228 void multipolygon_outer_ring_finish() {
229 set_size(m_ring_size_offset, m_points);
232 void multipolygon_inner_ring_start() {
235 m_ring_size_offset = m_data.size();
236 str_push(m_data, static_cast<uint32_t>(0));
239 void multipolygon_inner_ring_finish() {
240 set_size(m_ring_size_offset, m_points);
244 str_push(m_data, xy.
x);
245 str_push(m_data, xy.
y);
249 multipolygon_type multipolygon_finish() {
250 set_size(m_multipolygon_size_offset, m_polygons);
257 return convert_to_hex(data);
267 template <
typename TProjection = IdentityProjection>
274 #endif // OSMIUM_GEOM_WKB_HPP double y
Definition: coordinates.hpp:49
Definition: factory.hpp:146
type
Definition: entity_bits.hpp:63
void swap(Buffer &lhs, Buffer &rhs)
Definition: buffer.hpp:731
Namespace for everything in the Osmium library.
Definition: assembler.hpp:66
Definition: coordinates.hpp:46
wkb_type
Definition: wkb.hpp:49
out_type
Definition: wkb.hpp:54
double x
Definition: coordinates.hpp:48