public static int ReadBinary(byte[] buf, int ofs, out OsmRelation relation)
{
int p = 0;
ulong tmp;
p += ProtoBuf.ReadVarInt(buf, ofs + p, out tmp);
long id = (long)tmp;
p += ProtoBuf.ReadVarInt(buf, ofs + p, out tmp);
var values = new KeyValuePair <string, string> [tmp];
for (int i = 0; i < values.Length; i++)
{
string key, val;
p += ProtoBuf.ReadString(buf, ofs + p, out key);
p += ProtoBuf.ReadString(buf, ofs + p, out val);
values[i] = new KeyValuePair <string, string>(key, val);
}
p += ProtoBuf.ReadVarInt(buf, ofs + p, out tmp);
var members = new OsmRelationMember[tmp];
for (int i = 0; i < members.Length; i++)
{
p += OsmRelationMember.ReadBinary(buf, ofs + p, out members[i]);
}
relation = new OsmRelation(id, values, members);
return(p);
}
/// <summary>
/// liest ein oder mehrere OSM-Relationen ein und gibt die Ergebnisse in entsprechender Reihenfolge zurück
/// </summary>
/// <param name="relationIds">Relations-IDs, welche abgefragt werden sollen</param>
/// <returns>abgefragte Relationen</returns>
public OsmRelation[] ReadRelations(params long[] relationIds)
{
var result = new OsmRelation[relationIds.Length];
var searchRelations = Enumerable.Range(0, relationIds.Length).Select(i => new KeyValuePair <long, int>(relationIds[i], i)).ToArray(relationIds.Length);
Array.Sort(searchRelations, (x, y) => x.Key.CompareTo(y.Key));
var needBlobs = new List <OsmBlob>();
var lastBlob = nodeIndex[0];
foreach (var relationId in searchRelations.Select(x => x.Key))
{
if (relationId > lastBlob.maxRelationId || relationId < lastBlob.minRelationId)
{
lastBlob = relationIndex.BinarySearchSingle(x => relationId >= x.minRelationId && relationId <= x.maxRelationId ? 0L : x.minRelationId - relationId);
needBlobs.Add(lastBlob);
}
}
var blobDecoder = BlobSmtDecoder(needBlobs, (blob, buf) =>
{
try
{
OsmRelation[] tmp;
int len = PbfFast.DecodePrimitiveBlock(buf, 0, blob, out tmp);
if (len != blob.rawSize)
{
throw new PbfParseException();
}
return(tmp);
}
catch
{
return(null);
}
}).GetEnumerator();
OsmRelation[] relations = null;
var tmpRelations = new List <OsmRelation[]>();
for (int r = 0; r < searchRelations.Length; r++)
{
long relationId = searchRelations[r].Key;
if (relations == null || relations[relations.Length - 1].id < relationId)
{
relations = null;
for (int i = 0; i < tmpRelations.Count; i++)
{
if (relationId >= tmpRelations[i].First().id&& relationId <= tmpRelations[i].Last().id)
{
relations = tmpRelations[i];
tmpRelations.RemoveAt(i);
break;
}
}
while (relations == null)
{
blobDecoder.MoveNext();
relations = blobDecoder.Current;
if (relationId < relations.First().id || relationId > relations.Last().id)
{
tmpRelations.Add(relations);
relations = null;
}
}
Console.WriteLine("read relations: {0:N0} / {1:N0}", r + 1, searchRelations.Length);
}
result[searchRelations[r].Value] = relations.BinarySearchSingle(x => x.id - relationId);
}
return(result);
}
