public void Parse()
{
lock (_stream)
{
int step = 0;
int structLength = -1;
IParserStruct currentStruct = null;
//reset stream Position, After writing it points to the end of stream
_stream.Position = 0;
while (_stream.Position + 8 <= _stream.Length) //8 cause we need at least 8 bytes to start
{
if (step == 0)
{
//read Id - it must be always at first place
_stream.Read(_buffer, 0, 8); //8 bytes for StructId and its Length
int structId = BitConverter.ToInt32(_buffer, 0);
Type currentStructType;
if (!Structs.TryGetValue(structId, out currentStructType))
{
Debug.WriteLine(
string.Format(
"ERROR Getting value for structID {2} - Stream Length: {0}. Standalone: {1}",
_stream.Length, StandaloneUsage, structId));
_stream.SetLength(0);
_stream.Seek(0, SeekOrigin.Begin);
return;
//throw new BufferParserException(string.Format("Structure with ID = {0} is not supported.", structId));
}
currentStruct = (IParserStruct)Activator.CreateInstance(currentStructType);
//read struct Length
structLength = BitConverter.ToInt32(_buffer, 4);
step = 1;
continue;
}
if (step == 1)
{
if (currentStruct == null || structLength == -1)
{
throw new BufferParserException("Got to read the structure, but not created.");
}
if ((structLength + _stream.Position <= _stream.Length) && (structLength + _stream.Position <= _buffer.Length))
{
_stream.Read(_buffer, 0, structLength);
currentStruct.ReadBytes(_buffer, 0);
//make an additional check to ensure struct was read OK
//if (!currentStruct.CrcOk())
// throw new BufferParserException("Structure was read, but its CRC is wrong.");
//if is ok, raise the event that structure was read succesfully
if (!IsHistorical)
{
StructRead(this, new List <IParserStruct>()
{
currentStruct
});
}
else
{
lock (StructsRead) StructsRead.Add(currentStruct);
}
//go to read another structure
step = 0;
}
else
{
break; //nothing to read
}
}
}
if (step == 1)
{
_stream.Position -= 8;
}
int shiftBufferLength = (int)(_stream.Length - _stream.Position);
if (shiftBufferLength > 0)
{
_stream.Read(_buffer, 0, shiftBufferLength);
_stream.SetLength(0);
_stream.Seek(0, SeekOrigin.Begin);
_stream.Write(_buffer, 0, shiftBufferLength);
}
else
{
_stream.SetLength(0);
_stream.Seek(0, SeekOrigin.Begin);
}
}
}
public List <IParserStruct> Parse(byte[] message)
{
List <IParserStruct> result = new List <IParserStruct>();
try
{
MemoryStream _stream = new MemoryStream(message.Length);
_stream.Write(message, 0, message.Length);
byte[] _buffer = new byte[40 * 1024];
int step = 0;
int structLength = -1;
IParserStruct currentStruct = null;
//reset stream Position, After writing it points to the end of stream
_stream.Position = 0;
while (_stream.Position + 8 <= _stream.Length) //8 cause we need at least 8 bytes to start
{
if (step == 0)
{
//read Id - it must be always at first place
_stream.Read(_buffer, 0, 8); //8 bytes for StructId and its Length
int structId = BitConverter.ToInt32(_buffer, 0);
Type currentStructType;
if (!_structures.TryGetValue(structId, out currentStructType))
{
Log(string.Format("ERROR Getting value for structID {2} - Stream Length: {0}.", structId, _stream.Length));
_stream.SetLength(0);
_stream.Seek(0, SeekOrigin.Begin);
return(result);
//throw new BufferParserException(string.Format("Structure with ID = {0} is not supported.", structId));
}
currentStruct = (IParserStruct)Activator.CreateInstance(currentStructType);
//read struct Length
structLength = BitConverter.ToInt32(_buffer, 4);
step = 1;
continue;
}
if (step == 1)
{
if (currentStruct == null || structLength == -1)
{
Log("Got to read the structure, but not created.");
}
if (structLength + _stream.Position <= _stream.Length)
{
_stream.Read(_buffer, 0, structLength);
currentStruct.ReadBytes(_buffer, 0);
//make an additional check to ensure struct was read OK
//if (!currentStruct.CrcOk())
// throw new BufferParserException("Structure was read, but its CRC is wrong.");
//if is ok, raise the event that structure was read succesfully
result.Add(currentStruct);
//go to read another structure
step = 0;
}
else
{
break; //nothing to read
}
}
}
if (step == 1)
{
_stream.Position -= 8;
}
int shiftBufferLength = (int)(_stream.Length - _stream.Position);
if (shiftBufferLength > 0)
{
_stream.Read(_buffer, 0, shiftBufferLength);
_stream.SetLength(0);
_stream.Seek(0, SeekOrigin.Begin);
_stream.Write(_buffer, 0, shiftBufferLength);
}
else
{
_stream.SetLength(0);
_stream.Seek(0, SeekOrigin.Begin);
}
}
catch (Exception ex) { /*Log("EXCEPTION Parse() "+ex.Message);*/ }
return(result);
}
