public int ReadFromBuffer(out CtpCommand packet, byte[] buffer, int current, int length)
{
//Note: The code in these two modules are identical:
packet = null;
if (m_disposed)
{
return(0);
}
if (length < 2)
{
return(0);
}
if (!PacketMethods.TryReadPacket(buffer, current, length, MaximumPacketSize, out PacketContents payloadType, out int payloadFlags, out byte[] payloadBuffer, out int consumedLength))
{
return(0);
}
switch (payloadType)
{
case PacketContents.CommandSchema:
var scheme = new CtpCommandSchema(payloadBuffer);
m_inboundSchemes[payloadFlags] = scheme;
if (m_inboundSchemes.Count > MaximumSchemeCount)
{
throw new Exception("Too many schemes have been defined.");
}
break;
case PacketContents.CommandSchemaWithData:
packet = new CtpCommand(payloadBuffer);
break;
case PacketContents.CommandData:
if (m_inboundSchemes.TryGetValue(payloadFlags, out var commandSchema))
{
packet = new CtpCommand(commandSchema, payloadBuffer);
}
break;
case PacketContents.CompressedDeflate:
case PacketContents.CompressedZlib:
packet = Inflate(payloadType, payloadFlags, payloadBuffer);
break;
default:
throw new ArgumentOutOfRangeException();
}
return(consumedLength);
}
public CtpCommand(byte[] data)
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
int schemaLength = BigEndian.ToUInt16(data, 0);
byte[] schema = new byte[schemaLength];
Array.Copy(data, 2, schema, 0, schemaLength);
m_schema = new CtpCommandSchema(schema);
m_data = new byte[data.Length - 2 - schemaLength];
Array.Copy(data, data.Length - m_data.Length, m_data, 0, m_data.Length);
}
/// <summary>
/// Creates an <see cref="CtpCommand"/> from a byte array. This method also validates the data.
/// </summary>
/// <param name="data">The data</param>
/// <param name="schema"></param>
public CtpCommand(CtpCommandSchema schema, byte[] data)
{
m_schema = schema ?? throw new ArgumentNullException(nameof(schema));
m_data = data ?? throw new ArgumentNullException(nameof(data));
}
/// <summary>
/// Creates a <see cref="CtpCommandReader"/> from the specified byte array.
/// </summary>
/// <param name="schema"></param>
/// <param name="data"></param>
public CtpCommandReader(CtpCommandSchema schema, byte[] data)
{
m_schema = schema;
m_stream = new CtpObjectReader(data);
}
