list of descending timestamps between ascending versions of an osm object (based on history-161205.osm.pbf)

_results-20161205.csv

check.cpp

// searches for descending timestamps between ascending versions of osm objects in a history pbf file
//
// build with:
// g++ check.cpp -o check -O3 -I<path-to-libosmium>/include/ -lz -lbz2 -lexpat -lpthread

#include <cstdint>
#include <iostream>

#include <string>
#include <time.h>

#include <osmium/io/any_input.hpp>
#include <osmium/handler.hpp>
#include <osmium/visitor.hpp>

struct CountHandler : public osmium::handler::Handler {

    uint64_t count = 0;

    void process(osmium::OSMObject& obj, std::string type) {
        static osmium::object_id_type id_;
        static time_t timestamp_;

	time_t timestamp = obj.timestamp().seconds_since_epoch();

        if (id_ == obj.id()) {
            if (timestamp < timestamp_)
                std::cerr << "!!Found backward timestep! " << obj.id() << "@" << obj.version() << std::endl;
        }

        id_ = obj.id();
        timestamp_ = timestamp;
    }

    void node(osmium::Node& obj) {
      process(obj, "node");
    }
    void way(osmium::Way& obj) {
      process(obj, "way");
    }
    void relation(osmium::Relation& obj) {
      process(obj, "relation");
    }

};


int main(int argc, char* argv[]) {

    if (argc != 2) {
        std::cerr << "Usage: " << argv[0] << " OSMFILE\n";
        exit(1);
    }

    osmium::io::File infile(argv[1], ".pbf");
    osmium::io::Reader reader(infile, osmium::osm_entity_bits::all);

    CountHandler handler;
    osmium::apply(reader, handler);
    reader.close();

    std::cerr << "processed objects count: "     << handler.count << "\n";

}