/// <summary>
/// Gets the next event of specified types from the file.
/// </summary>
/// <param name="streamDataTypes">The event types to retrieve.</param>
/// <returns>The next XEFEvent if available; otherwise, null.</returns>
public XEFEvent GetNextEvent(ICollection <Guid> streamDataTypes)
{
XEFEvent xefEvent = null;
do
{
xefEvent = GetNextEvent();
} while (xefEvent != null && !streamDataTypes.Contains(xefEvent.EventStreamDataTypeId));
return(xefEvent);
}
private XEFStream ReadStreamDescription()
{
//
// Stream name
//
XEFEvent nameEvent = ReadDataEvent();
// Extract useful data
short streamIndex = BitConverter.ToInt16(nameEvent.TagData, DataConstants.STREAM_INDEX_OFFSET);
short streamFlags = BitConverter.ToInt16(nameEvent.TagData, DataConstants.STREAM_FLAGS_OFFSET);
bool compressed = (streamFlags & DataConstants.FLAG_COMPRESSED) == DataConstants.FLAG_COMPRESSED;
byte[] guidBuf = new byte[DataConstants.STREAM_TYPID_SIZE];
Array.Copy(nameEvent.TagData, DataConstants.STREAM_TYPID_OFFSET, guidBuf, 0, DataConstants.STREAM_TYPID_SIZE);
Guid dataTypeId = new Guid(guidBuf);
string dataTypeName = Encoding.Unicode.GetString(nameEvent.EventData, 0, DataConstants.STREAM_NAME_SIZE).TrimEnd('\0');
short tagSize = BitConverter.ToInt16(nameEvent.EventData, DataConstants.STREAM_TAGSIZE_OFFSET);
//
// Unknown compressed data
//
// If compressed, skip extra data (unknown purpose)
if (compressed)
{
_reader.ReadBytes(DataConstants.ARC_STREAM_EXTRA_UNK_SIZE);
}
//
// Stream GUID
//
// Second event is considered a property event with stream index 0
XEFEvent guidEvent = ReadDataEvent();
Array.Copy(nameEvent.EventData, DataConstants.STREAM_SEMID_OFFSET, guidBuf, 0, DataConstants.STREAM_SEMID_SIZE);
Guid semanticId = new Guid(guidBuf);
// Create new stream
return(new XEFStream(streamIndex, streamFlags, tagSize, dataTypeName, dataTypeId, semanticId));
}
/// <summary>
/// Gets all events of specified types from the file.
/// </summary>
/// <param name="streamDataTypes">The event type to retrieve.</param>
/// <returns>An IReadOnlyList of all the XEFEvents.</returns>
public IReadOnlyList <XEFEvent> GetAllEvents(ICollection <Guid> streamDataTypes)
{
// Reset reader
_reader.BaseStream.Position = _eventStartAddress;
// Read all events into list
List <XEFEvent> allEvents = new List <XEFEvent>();
while (!EndOfStream)
{
XEFEvent xefEvent = GetNextEvent();
if (xefEvent != null && streamDataTypes.Contains(xefEvent.EventStreamDataTypeId))
{
allEvents.Add(xefEvent);
}
}
return(allEvents);
}
/// <summary>
/// Gets all events from the file.
/// </summary>
/// <returns>An IReadOnlyList of all the XEFEvents.</returns>
public IReadOnlyList <XEFEvent> GetAllEvents()
{
// Reset reader
_reader.BaseStream.Position = _eventStartAddress;
// Read all events into list
List <XEFEvent> allEvents = new List <XEFEvent>();
while (!EndOfStream)
{
XEFEvent xefEvent = GetNextEvent();
if (xefEvent != null)
{
allEvents.Add(xefEvent);
}
}
return(allEvents);
}
public void AddEvent(XEFEvent xefEvent)
{
// TODO Not storing events because it loads too much data into memory
_eventsCount++;
}