Suche die TByteBuffer Klasse aus SysUtils ab XE 3 (?)

[juergen]

Delphi-Quellcode:

function SendRequest(var AData: string): boolean;
var
  len: integer;
  bytes: TBytes;
  temp_buffer: TByteArray;
  buffer: TByteBuffer;   //<-- das hier kennt mein  Delphi nicht. In SysUtils finde ich nur etwas von TByte 


  begin
  Result := false;

  if AData <> '' then
  begin
    // FClient = ScktComp.TClientSocket;
    if FClient.Active then
    begin
      len := Length(AData);

      SetLength(bytes,Length(AData));

      bytes := BytesOf(AData);

      if FClient.Socket.SendBuf(bytes[0],Length(bytes)) = len then
      begin
        buffer := TByteBuffer.Create;

        try
          if not WaitForResponse(FClient.Socket,1) then
          begin
            len := FClient.Socket.ReceiveLength;

            // Nutzdaten übernehmen und zurückgeben
            if not WaitForResponse(FClient.Socket,len) then
            begin
              ZeroMemory(@temp_buffer,SizeOf(temp_buffer));

              AData := '';

              repeat
                len := FClient.Socket.ReceiveLength;

                if FClient.Socket.ReceiveBuf(temp_buffer,len) > 0 then
                begin
                  buffer.AddBytes(temp_buffer[0],len);
                  ZeroMemory(@temp_buffer,SizeOf(temp_buffer));
                  Delay(1);
                end;
              until (len = 0);

              ZeroMemory(@bytes,SizeOf(bytes));
              SetLength(bytes,buffer.Size);
              CopyMemory(@bytes[0],@buffer.Data[0],buffer.Size);
              AData := AData + TEncoding.Unicode.GetString(bytes);

              if AData <> '' then
              begin
                // In AData steht die Antwort
                Result := true;
              end;
            end;
          end;
        finally
          buffer.Free;
          Screen.Cursor := crDefault;
        end;
      end;
    end;
  end;
end;