Switch from using text ids to 64bit integer ids

Waaaay back GDAL didn't support 64 bit ids, so we used text fields
instead. But that has been fixed long ago, so we should be able to use
them now.

Author: joto

src/output_database.cpp

@@ -50,13 +50,13 @@ OutputDatabase::OutputDatabase(const std::string& driver, const std::string& out
     m_layer_water_polygons(m_dataset, "water_polygons", wkbPolygon, layer_options()),
     m_layer_lines(m_dataset, "lines", wkbLineString, layer_options()) {
 
-    m_layer_error_points.add_field("osm_id", OFTString, 11);
+    m_layer_error_points.add_field("osm_id", OFTInteger64, 1);
     m_layer_error_points.add_field("error", OFTString, 16);
 
-    m_layer_error_lines.add_field("osm_id", OFTString, 11);
+    m_layer_error_lines.add_field("osm_id", OFTInteger64, 1);
     m_layer_error_lines.add_field("error", OFTString, 16);
 
-    m_layer_rings.add_field("osm_id",  OFTString, 11);
+    m_layer_rings.add_field("osm_id",  OFTInteger64, 1);
     m_layer_rings.add_field("nways",   OFTInteger, 6);
     m_layer_rings.add_field("npoints", OFTInteger, 8);
     m_layer_rings.add_field("fixed",   OFTInteger, 1);
@@ -149,15 +149,15 @@ void OutputDatabase::commit() {
 void OutputDatabase::add_error_point(std::unique_ptr<OGRPoint>&& point, const char* error, osmium::object_id_type id) {
     m_srs.transform(point.get());
     gdalcpp::Feature feature{m_layer_error_points, std::move(point)};
-    feature.set_field("osm_id", std::to_string(id).c_str());
+    feature.set_field("osm_id", static_cast<GIntBig>(id));
     feature.set_field("error", error);
     feature.add_to_layer();
 }
 
 void OutputDatabase::add_error_line(std::unique_ptr<OGRLineString>&& linestring, const char* error, osmium::object_id_type id) {
     m_srs.transform(linestring.get());
     gdalcpp::Feature feature{m_layer_error_lines, std::move(linestring)};
-    feature.set_field("osm_id", std::to_string(id).c_str());
+    feature.set_field("osm_id", static_cast<GIntBig>(id));
     feature.set_field("error", error);
     feature.add_to_layer();
 }
@@ -211,7 +211,7 @@ void OutputDatabase::add_ring(std::unique_ptr<OGRPolygon>&& polygon, osmium::obj
     }
 
     gdalcpp::Feature feature{m_layer_rings, std::move(polygon)};
-    feature.set_field("osm_id", static_cast<int>(osm_id));
+    feature.set_field("osm_id", static_cast<GIntBig>(osm_id));
     feature.set_field("nways", static_cast<int>(nways));
     feature.set_field("npoints", static_cast<int>(npoints));
     feature.set_field("fixed", fixed);