private void WriteTags(IOSMElement element, List <byte> bytes)
{
if (element.Tags.Count == 0)
{
return;
}
foreach (string tagKey in element.Tags)
{
var tagKeyBytes = Encoding.UTF8.GetBytes(tagKey);
var tagValueBytes = Encoding.UTF8.GetBytes(element.Tags[tagKey]);
var elementPosition = this._storedStringPairs.GetElementPosition(tagKeyBytes, tagValueBytes);
if (elementPosition != -1)
{
var positionBytes = VarintBitConverter.GetVarintBytes((uint)elementPosition);
bytes.AddRange(positionBytes);
}
else
{
var stringPair = new KeyValuePair <byte[], byte[]>(tagKeyBytes, tagValueBytes);
bytes.Add(0x00);
bytes.AddRange(tagKeyBytes);
bytes.Add(0x00);
bytes.AddRange(tagValueBytes);
bytes.Add(0x00);
if (stringPair.Key.Length + stringPair.Value.Length <= 250)
{
this._storedStringPairs.Insert(0, stringPair);
}
}
}
}
private void WriteVersionData(IOSMElement element, List <byte> bytes)
{
if (element.Version == 0)
{
bytes.Add(0x00);
return;
}
var versionBytes = VarintBitConverter.GetVarintBytes(element.Version);
bytes.AddRange(versionBytes);
var timestamp = (long)element.Timestamp.Subtract(UNIX_START).TotalSeconds;
var timestampDiff = timestamp - this._lastTimestamp;
var timestampBytes = VarintBitConverter.GetVarintBytes(timestampDiff);
this._lastTimestamp = timestamp;
bytes.AddRange(timestampBytes);
if (timestamp == 0)
{
return;
}
var changesetDiff = (long)element.Changeset - this._lastChangeset;
var changesetBytes = VarintBitConverter.GetVarintBytes(changesetDiff);
this._lastChangeset = (long)element.Changeset;
bytes.AddRange(changesetBytes);
var uidBytes = VarintBitConverter.GetVarintBytes(element.UserId);
if (element.UserId == 0)
{
uidBytes = new byte[0];
}
var userBytes = Encoding.UTF8.GetBytes(element.UserName);
var elementPosition = this._storedStringPairs.GetElementPosition(uidBytes, userBytes);
if (elementPosition != -1)
{
var positionBytes = VarintBitConverter.GetVarintBytes((uint)elementPosition);
bytes.AddRange(positionBytes);
}
else
{
bytes.Add(0x00);
bytes.AddRange(uidBytes);
bytes.Add(0x00);
bytes.AddRange(userBytes);
bytes.Add(0x00);
var uidUserPair = new KeyValuePair <byte[], byte[]>(uidBytes, userBytes);
if (uidUserPair.Key.Length + uidUserPair.Value.Length <= 250)
{
this._storedStringPairs.Insert(0, uidUserPair);
}
}
}
/// <summary>
/// Writes the element.
/// </summary>
/// <param name="element">Element.</param>
public void WriteElement(IOSMElement element)
{
if (element is OSMNode)
{
this.WriteNode((OSMNode)element);
}
else if (element is OSMWay)
{
this.WriteWay((OSMWay)element);
}
else if (element is OSMRelation)
{
this.WriteRelation((OSMRelation)element);
}
}
/// <summary>
/// Writes the element.
/// </summary>
/// <param name="element">Element.</param>
/// <param name="writtenData">Written data.</param>
public void WriteElement(IOSMElement element, out byte[] writtenData)
{
writtenData = null;
if (element is OSMNode)
{
this.WriteNode((OSMNode)element, out writtenData);
}
else if (element is OSMWay)
{
this.WriteWay((OSMWay)element, out writtenData);
}
else if (element is OSMRelation)
{
this.WriteRelation((OSMRelation)element, out writtenData);
}
}
