internal override DataRowMessage Load(ReadBuffer buf)
{
buf.Ensure(sizeof(short));
NumColumns = buf.ReadInt16();
Buffer = buf;
Column = -1;
ColumnLen = -1;
PosInColumn = 0;
return this;
}
internal NpgsqlRawCopyStream(NpgsqlConnector connector, string copyCommand)
{
_connector = connector;
_readBuf = connector.ReadBuffer;
_writeBuf = connector.WriteBuffer;
_connector.SendQuery(copyCommand);
var msg = _connector.ReadMessage(DataRowLoadingMode.NonSequential);
switch (msg.Code)
{
case BackendMessageCode.CopyInResponse:
var copyInResponse = (CopyInResponseMessage) msg;
IsBinary = copyInResponse.IsBinary;
_canWrite = true;
break;
case BackendMessageCode.CopyOutResponse:
var copyOutResponse = (CopyOutResponseMessage) msg;
IsBinary = copyOutResponse.IsBinary;
_canRead = true;
break;
default:
throw _connector.UnexpectedMessageReceived(msg.Code);
}
}
public abstract void PrepareRead(ReadBuffer buf, int len, FieldDescription fieldDescription = null);
internal NpgsqlNotificationEventArgs(ReadBuffer buf)
{
PID = buf.ReadInt32();
Condition = buf.ReadNullTerminatedString();
AdditionalInformation = buf.ReadNullTerminatedString();
}
TPsv ISimpleTypeHandler <TPsv> .Read(ReadBuffer buf, int len, [CanBeNull] FieldDescription fieldDescription) => ReadPsv(buf, len, fieldDescription);
internal override async ValueTask <object> ReadPsvAsObject(ReadBuffer buf, int len, bool async, FieldDescription fieldDescription = null) => await Read <TPsv>(buf, len, async, fieldDescription);
internal virtual ValueTask <object> ReadPsvAsObject(ReadBuffer buf, int len, bool async, FieldDescription fieldDescription = null) => ReadAsObject(buf, len, async, fieldDescription);
internal virtual object ReadPsvAsObjectFully(ReadBuffer buf, int len, FieldDescription fieldDescription = null)
{
return(ReadValueAsObjectFully(buf, len, fieldDescription));
}
internal abstract Task <T> ReadFullyAsync <T>(ReadBuffer buf, int len, CancellationToken cancellationToken, FieldDescription fieldDescription = null);
internal PostgresNotice(ReadBuffer buf)
{
_msg = new ErrorOrNoticeMessage(buf);
}
void Cleanup()
{
_connector = null;
_readBuf = null;
_writeBuf = null;
_isDisposed = true;
}
internal void CopyTo(ReadBuffer other)
{
Contract.Assert(other.Size - other._filledBytes >= ReadBytesLeft);
Array.Copy(_buf, ReadPosition, other._buf, other._filledBytes, ReadBytesLeft);
other._filledBytes += ReadBytesLeft;
}
internal ReadBuffer EnsureOrAllocateTemp(int count)
{
if (count <= Size) {
Ensure(count);
return this;
}
// Worst case: our buffer isn't big enough. For now, allocate a new buffer
// and copy into it
// TODO: Optimize with a pool later?
var tempBuf = new ReadBuffer(Connector, Underlying, count, TextEncoding);
CopyTo(tempBuf);
Clear();
tempBuf.Ensure(count);
return tempBuf;
}
public void SetUp()
{
Underlying = new MemoryStream();
ReadBuffer = new ReadBuffer(null, Underlying, ReadBuffer.DefaultBufferSize, PGUtil.UTF8Encoding);
}
internal NpgsqlNotificationEventArgs(ReadBuffer buf)
{
PID = buf.ReadInt32();
Condition = buf.ReadNullTerminatedString();
AdditionalInformation = buf.ReadNullTerminatedString();
}
public override void PrepareRead(ReadBuffer buf, int len, FieldDescription fieldDescription = null)
{
Contract.Requires(buf != null);
}
internal abstract T ReadFully <T>(ReadBuffer buf, int len, FieldDescription fieldDescription = null);
internal void CopyTo(ReadBuffer other)
{
Contract.Assert(other.Size - other._filledBytes >= ReadBytesLeft);
Array.Copy(_buf, ReadPosition, other._buf, other._filledBytes, ReadBytesLeft);
other._filledBytes += ReadBytesLeft;
}
internal abstract object ReadValueAsObjectFully(ReadBuffer buf, int len, FieldDescription fieldDescription = null);
internal PostgresException(ReadBuffer buf)
{
_msg = new ErrorOrNoticeMessage(buf);
}
internal abstract ValueTask <object> ReadAsObject(ReadBuffer buf, int len, bool async, FieldDescription fieldDescription = null);
public object ReadAsObject(ReadBuffer buf, int len, FieldDescription fieldDescription = null)
{
return(Read(buf, len, fieldDescription));
}
public abstract T Read(ReadBuffer buf, int len, FieldDescription fieldDescription = null);
internal override object ReadPsvAsObjectFully(ReadBuffer buf, int len, FieldDescription fieldDescription = null)
{
return(ReadFully <TPsv>(buf, len, fieldDescription));
}
internal abstract TPsv ReadPsv(ReadBuffer buf, int len, FieldDescription fieldDescription = null);
TPsv ISimpleTypeHandler <TPsv> .Read(ReadBuffer buf, int len, FieldDescription fieldDescription)
{
return(ReadPsv(buf, len, fieldDescription));
}
public abstract ValueTask <T> Read(ReadBuffer buf, int len, bool async, FieldDescription fieldDescription = null);
internal void CopyTo(ReadBuffer other)
{
Debug.Assert(other.Size - other._filledBytes >= ReadBytesLeft);
Array.Copy(Buffer, ReadPosition, other.Buffer, other._filledBytes, ReadBytesLeft);
other._filledBytes += ReadBytesLeft;
}
