private Object FastpathV3(Int32 fnid, Boolean resulttype, FastpathArg[] args)
{
// give thread safety
lock (stream)
{
// send the function call
{
Int32 l_msgLen = 0;
l_msgLen += 16;
for (Int32 i = 0; i < args.Length; i++)
{
l_msgLen += args[i].SendSize();
}
stream.WriteByte((Byte)'F');
PGUtil.WriteInt32(stream, l_msgLen);
PGUtil.WriteInt32(stream, fnid);
PGUtil.WriteInt16(stream, 1);
PGUtil.WriteInt16(stream, 1);
PGUtil.WriteInt16(stream, (short)args.Length);
for (Int32 i = 0; i < args.Length; i++)
{
args[i].Send(stream);
}
PGUtil.WriteInt16(stream, 1);
// This is needed, otherwise data can be lost
stream.Flush();
}
// Now handle the result
// Now loop, reading the results
Object result = null; // our result
Exception error = null;
Int32 c;
Boolean l_endQuery = false;
Byte[] input_buffer = new Byte[512];
while (!l_endQuery)
{
c = (Char)stream.ReadByte();
switch (c)
{
case 'A': // Asynchronous Notify
Int32 msglen = PGUtil.ReadInt32(stream, input_buffer);
Int32 pid = PGUtil.ReadInt32(stream, input_buffer);
String msg = PGUtil.ReadString(stream, conn.Connector.Encoding);
PGUtil.ReadString(stream, conn.Connector.Encoding);
String param = PGUtil.ReadString(stream, conn.Connector.Encoding);
conn.Connector.CheckErrorsAndNotifications();
break;
//------------------------------
// Error message returned
case 'E':
NpgsqlError e = new NpgsqlError(conn.BackendProtocolVersion);
e.ReadFromStream(stream, conn.Connector.Encoding);
throw new NpgsqlException(e.ToString());
//------------------------------
// Notice from backend
case 'N':
Int32 l_nlen = PGUtil.ReadInt32(stream, input_buffer);
NpgsqlError e1 = new NpgsqlError(conn.BackendProtocolVersion);
e1.ReadFromStream(stream, conn.Connector.Encoding);
conn.Connector.Mediator.Errors.Add(e1);
break;
case 'V':
Int32 l_msgLen = PGUtil.ReadInt32(stream, input_buffer);
Int32 l_valueLen = PGUtil.ReadInt32(stream, input_buffer);
if (l_valueLen == -1)
{
//null value
}
else if (l_valueLen == 0)
{
result = new Byte[0];
}
else
{
// Return an Integer if
if (resulttype)
{
result = PGUtil.ReadInt32(stream, input_buffer);
}
else
{
Byte[] buf = new Byte[l_valueLen];
Int32 bytes_from_stream = 0;
Int32 total_bytes_read = 0;
Int32 size = l_valueLen;
do
{
bytes_from_stream = stream.Read(buf, total_bytes_read, size);
total_bytes_read += bytes_from_stream;
size -= bytes_from_stream;
}while(size > 0);
result = buf;
}
}
break;
case 'Z':
//TODO: use size better
if (PGUtil.ReadInt32(stream, input_buffer) != 5)
{
throw new NpgsqlException("Received Z");
}
//TODO: handle transaction status
Char l_tStatus = (Char)stream.ReadByte();
l_endQuery = true;
break;
default:
throw new NpgsqlException("postgresql.fp.protocol received " + c.ToString());
}
}
if (error != null)
{
throw error;
}
return(result);
}
}