thank you. It sounds like what I am looking for
No, message inheritance is not supported. Have a look at http://code.google.com/apis/protocolbuffers/docs/techniques.html#union and see if that solves your use case. On Wed, Mar 2, 2011 at 7:04 AM, ZHOU Xiaobo <xb.z...@qq.com> wrote: > Hi: > My problem is that when I receive a packet I have to check one field( say > 'int32 COMMAND' ) to decide > the type of the inner packet. For example: > > message OutterPkt { > required fiexed32 Length = 1; > required int32 COMMAND = 2; > required string Content = 3; > } > > message InnerPktA { > required int32 UserID; > required int16 UserGender; > } > > message InnerPktB { > required string UserName = 1; > reruired string UserDescripton = 2; > } > > my code to process this packet will be: > > ...... > OuuterPkt outp; > outp.ParseFromString(inputbuf); > if (outp.COMMAND == 1) { > InnerPktA pkta; > pkta.ParseFromString(outp.Content()); > ...... > } else if (outp.COMMAND == 2) { > InnerPktB pktb; > pktb.ParseFromString(outp.Content()); > ...... > } else { > ........ > } > > > My question is: I think the pseudo code above is not efficient because it > parses the buffer twice and there are too many memcpy. > Is there a better way to deal with this situation? > thanks.X > > -- > You received this message because you are subscribed to the Google Groups > "Protocol Buffers" group. > To post to this group, send email to protobuf@googlegroups.com. > To unsubscribe from this group, send email to > protobuf+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/protobuf?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To post to this group, send email to protobuf@googlegroups.com. To unsubscribe from this group, send email to protobuf+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/protobuf?hl=en.
