1#include "HierarchyFormatReader.h"
2
3#include <IO/ReadHelpers.h>
4#include <IO/WriteHelpers.h>
5
6
7bool RegionsHierarchyFormatReader::readNext(RegionEntry & entry)
8{
9 while (!input->eof())
10 {
11 /** Our internal geobase has negative numbers,
12 * that means "this is garbage, ignore this row".
13 */
14 Int32 read_region_id = 0;
15 Int32 read_parent_id = 0;
16 Int8 read_type = 0;
17
18 DB::readIntText(read_region_id, *input);
19 DB::assertChar('\t', *input);
20 DB::readIntText(read_parent_id, *input);
21 DB::assertChar('\t', *input);
22 DB::readIntText(read_type, *input);
23
24 /** Then there can be a newline (old version)
25 * or tab, the region's population, line feed (new version).
26 */
27 RegionPopulation population = 0;
28 if (!input->eof() && *input->position() == '\t')
29 {
30 ++input->position();
31 UInt64 population_big = 0;
32 DB::readIntText(population_big, *input);
33 population = population_big > std::numeric_limits<RegionPopulation>::max() ? std::numeric_limits<RegionPopulation>::max()
34 : population_big;
35 }
36 DB::assertChar('\n', *input);
37
38 if (read_region_id <= 0 || read_type < 0)
39 continue;
40
41 RegionID region_id = read_region_id;
42 RegionID parent_id = 0;
43
44 if (read_parent_id >= 0)
45 parent_id = read_parent_id;
46
47 RegionType type = static_cast<RegionType>(read_type);
48
49 entry.id = region_id;
50 entry.parent_id = parent_id;
51 entry.type = type;
52 entry.population = population;
53 return true;
54 }
55
56 return false;
57}
58