C++ OSMObject::tags方法代码示例

 void output_pubs(const osmium::OSMObject& object) {
     const char* amenity = object.tags()["amenity"];
     if (amenity && !strcmp(amenity, "pub")) {
         const char* name = object.tags()["name"];
         if (name) {
             std::cout << name << std::endl;
         }
     }
 }

 void update(const osmium::OSMObject& object) {
     update_int64(object.id());
     update_bool(object.visible());
     update_int32(object.version());
     update(object.timestamp());
     update_int32(object.uid());
     update_string(object.user());
     update(object.tags());
 }

 static void add_tags(gdalcpp::Feature& feature, const osmium::OSMObject& object) {
     std::string tags;
     for (const auto& tag : object.tags()) {
         tags += tag.key();
         tags += "=";
         tags += tag.value();
         tags += ",";
     }
     if (!tags.empty()) {
         tags.pop_back();
     }
     feature.set_field("tags", tags.c_str());
 }

 void write_meta(const osmium::OSMObject& object) {
     output_int(object.id());
     if (m_options.add_metadata) {
         *m_out += ' ';
         write_field_int('v', object.version());
         *m_out += " d";
         *m_out += (object.visible() ? 'V' : 'D');
         *m_out += ' ';
         write_field_int('c', object.changeset());
         *m_out += ' ';
         write_field_timestamp('t', object.timestamp());
         *m_out += ' ';
         write_field_int('i', object.uid());
         *m_out += " u";
         append_encoded_string(object.user());
     }
     write_tags(object.tags());
 }

 void write_meta(const osmium::OSMObject& object) {
     output_formatted("%" PRId64 " v%d d", object.id(), object.version());
     *m_out += (object.visible() ? 'V' : 'D');
     output_formatted(" c%d t", object.changeset());
     *m_out += object.timestamp().to_iso();
     output_formatted(" i%d u", object.uid());
     append_encoded_string(object.user());
     *m_out += " T";
     bool first = true;
     for (const auto& tag : object.tags()) {
         if (first) {
             first = false;
         } else {
             *m_out += ',';
         }
         append_encoded_string(tag.key());
         *m_out += '=';
         append_encoded_string(tag.value());
     }
 }

bool lua_tagtransform_t::filter_tags(osmium::OSMObject const &o, int *polygon,
                                     int *roads, export_list const &,
                                     taglist_t &out_tags, bool)
{
    switch (o.type()) {
    case osmium::item_type::node:
        lua_getglobal(L, m_node_func.c_str());
        break;
    case osmium::item_type::way:
        lua_getglobal(L, m_way_func.c_str());
        break;
    case osmium::item_type::relation:
        lua_getglobal(L, m_rel_func.c_str());
        break;
    default:
        throw std::runtime_error("Unknown OSM type");
    }

    lua_newtable(L); /* key value table */

    lua_Integer sz = 0;
    for (auto const &t : o.tags()) {
        lua_pushstring(L, t.key());
        lua_pushstring(L, t.value());
        lua_rawset(L, -3);
        ++sz;
    }
    if (m_extra_attributes && o.version() > 0) {
        taglist_t tags;
        tags.add_attributes(o);
        for (auto const &t : tags) {
            lua_pushstring(L, t.key.c_str());
            lua_pushstring(L, t.value.c_str());
            lua_rawset(L, -3);
        }
        sz += tags.size();
    }

    lua_pushinteger(L, sz);

    if (lua_pcall(L, 2, (o.type() == osmium::item_type::way) ? 4 : 2, 0)) {
        fprintf(stderr,
                "Failed to execute lua function for basic tag processing: %s\n",
                lua_tostring(L, -1));
        /* lua function failed */
        return 1;
    }

    if (o.type() == osmium::item_type::way) {
        if (roads) {
            *roads = (int)lua_tointeger(L, -1);
        }
        lua_pop(L, 1);
        if (polygon) {
            *polygon = (int)lua_tointeger(L, -1);
        }
        lua_pop(L, 1);
    }

    lua_pushnil(L);
    while (lua_next(L, -2) != 0) {
        const char *key = lua_tostring(L, -2);
        const char *value = lua_tostring(L, -1);
        out_tags.emplace_back(key, value);
        lua_pop(L, 1);
    }

    bool filter = lua_tointeger(L, -2);

    lua_pop(L, 2);

    return filter;
}

bool gazetteer_style_t::copy_out_maintag(pmaintag_t const &tag,
                                         osmium::OSMObject const &o,
                                         std::string const &geom,
                                         db_copy_mgr_t &buffer)
{
    std::vector<osmium::Tag const *> domain_name;
    if (std::get<2>(tag) & SF_MAIN_NAMED_KEY) {
        domain_name = domain_names(std::get<0>(tag), o.tags());
        if (domain_name.empty())
            return false;
    }

    if (std::get<2>(tag) & SF_MAIN_NAMED) {
        if (domain_name.empty() && !m_is_named) {
            return false;
        }
    }

    buffer.new_line(place_table);
    // osm_id
    buffer.add_column(o.id());
    // osm_type
    char const osm_type[2] = { (char)toupper(osmium::item_type_to_char(o.type())), '\0'};
    buffer.add_column(osm_type);
    // class
    buffer.add_column(std::get<0>(tag));
    // type
    buffer.add_column(std::get<1>(tag));
    // names
    if (!domain_name.empty()) {
        auto prefix_len = strlen(std::get<0>(tag)) + 1; // class name and ':'
        buffer.new_hash();
        for (auto *t : domain_name) {
            buffer.add_hash_elem(t->key() + prefix_len, t->value());
        }
        buffer.finish_hash();
    } else {
        bool first = true;
        // operator will be ignored on anything but these classes
        if (m_operator && (std::get<2>(tag) & SF_MAIN_OPERATOR)) {
            buffer.new_hash();
            buffer.add_hash_elem("operator", m_operator);
            first = false;
        }
        for (auto const &entry : m_names) {
            if (first) {
                buffer.new_hash();
                first = false;
            }

            buffer.add_hash_elem(entry.first, entry.second);
        }

        if (first) {
            buffer.add_null_column();
        } else {
            buffer.finish_hash();
        }
    }
    // admin_level
    buffer.add_column(m_admin_level);
    // address
    if (m_address.empty()) {
        buffer.add_null_column();
    } else {
        buffer.new_hash();
        for (auto const &a : m_address) {
            if (strcmp(a.first, "tiger:county") == 0) {
                std::string term;
                auto *end = strchr(a.second, ',');
                if (end) {
                    auto len = (std::string::size_type)(end - a.second);
                    term = std::string(a.second, len);
                } else {
                    term = a.second;
                }
                term += " county";
                buffer.add_hash_elem(a.first, term);
            } else {
                buffer.add_hash_elem(a.first, a.second);
            }
        }
        buffer.finish_hash();
    }
    // extra tags
    if (m_extra.empty()) {
        buffer.add_null_column();
    } else {
        buffer.new_hash();
        for (auto const &entry : m_extra) {
            buffer.add_hash_elem(entry.first, entry.second);
        }
        buffer.finish_hash();
    }
    // add the geometry - encoding it to hex along the way
    buffer.add_hex_geom(geom);

    buffer.finish_line();

    return true;
//.........这里部分代码省略.........

void gazetteer_style_t::process_tags(osmium::OSMObject const &o)
{
    clear();

    char const *postcode = nullptr;
    char const *country = nullptr;
    char const *place = nullptr;
    flag_t place_flag;
    bool address_point = false;
    bool interpolation = false;
    bool admin_boundary = false;
    bool postcode_fallback = false;

    for (auto const &item : o.tags()) {
        char const *k = item.key();
        char const *v = item.value();

        if (strcmp(k, "admin_level") == 0) {
            m_admin_level = atoi(v);
            if (m_admin_level <= 0 || m_admin_level > MAX_ADMINLEVEL)
                m_admin_level = MAX_ADMINLEVEL;
            continue;
        }

        if (m_any_operator_matches && strcmp(k, "operator") == 0) {
            m_operator = v;
        }

        flag_t flag = find_flag(k, v);

        if (flag == 0) {
            continue;
        }

        if (flag & SF_MAIN) {
            if (strcmp(k, "place") == 0) {
                place = v;
                place_flag = flag;
            } else {
                m_main.emplace_back(k, v, flag);
                if ((flag & SF_BOUNDARY) && strcmp(v, "administrative") == 0) {
                    admin_boundary = true;
                }
            }
        }

        if (flag & (SF_NAME | SF_REF)) {
            m_names.emplace_back(k, v);
            if (flag & SF_NAME) {
                m_is_named = true;
            }
        }

        if (flag & SF_ADDRESS) {
            char const *addr_key;
            if (strncmp(k, "addr:", 5) == 0) {
                addr_key = k + 5;
            } else if (strncmp(k, "is_in:", 6) == 0) {
                addr_key = k + 6;
            } else {
                addr_key = k;
            }

            if (strcmp(addr_key, "postcode") == 0) {
                if (!postcode) {
                    postcode = v;
                }
            } else if (strcmp(addr_key, "country") == 0) {
                if (!country && strlen(v) == 2) {
                    country = v;
                }
            } else {
                bool first = std::none_of(
                    m_address.begin(), m_address.end(), [&](ptag_t const &t) {
                        return strcmp(t.first, addr_key) == 0;
                    });
                if (first) {
                    m_address.emplace_back(addr_key, v);
                }
            }
        }

        if (flag & SF_ADDRESS_POINT) {
            address_point = true;
            m_is_named = true;
        }

        if ((flag & SF_POSTCODE) && !postcode) {
            postcode = v;
            if (flag & SF_MAIN_FALLBACK) {
                postcode_fallback = true;
            }
        }

        if ((flag & SF_COUNTRY) && !country && std::strlen(v) == 2) {
            country = v;
        }

        if (flag & SF_EXTRA) {
            m_extra.emplace_back(k, v);
//.........这里部分代码省略.........