"<header><MsgLen><Msg><header><MsgLen><Msg>..." is the standard form of
protobuf "repeated" data. A header value of 10 is the standard form for a
length-prefixed field with key 1. If you want to read all the objects
together, then write a wrapper message, i.e.
message animals {
repeated animal items = 1;
}
and treat it as a single "animals" instance. If this is already what your
"animalList" is (sorry, you don't show the .proto), then you can just read
the entire stream into "animalList" - you don't need to limit it at all.
Does that help?
Marc
On 13 May 2013 19:00, <vic.li...@gmail.com> wrote:
> I have c# code which serialize an objects (using protobuf-net) and I am
> able to deserialize it in c++ using protocol buffer.
> The serialize data is the form as
> <header><MsgLen><Msg><header><MsgLen><Msg>.
> I extract it using code below
>
> OOGLE_PROTOBUF_VERIFY_VERSION; string fpath = "animal.bin";
>
> fstream input(fpath, ios::in | ios::binary);if (!input){
> cerr << "failed to open " << fpath << endl;
> return false;}ZeroCopyInputStream *raw_in = new
> IstreamInputStream(&input);CodedInputStream *coded_in = new
> CodedInputStream(raw_in);
> google::protobuf::uint32 n;
> std::string tmpStr;
> animal::animalInfo animalList;
>
> coded_in->ReadVarint32(&n);
> cout << "# " << n << endl; //output: #10
> coded_in->ReadRaw(&tmpStr,n); //tmpStr shows data like >>1..Rat..Ch
> animalList.ParseFromArray(&tmpStr,1); //Get serialized data to animalList
>
>
> While it does the job.
>
> I am wondering what is the recommended way for doing this in protocol
> buffer. Specially I will like not to have to directly read Varint32 etc
> from "<header><MsgLen><Msg>" to get 1 message @ a time.
> Also more importantly, how can I extract all the objects together ?
>
> Any advice here will be helpful.
> Thanks
>
>
>
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Regards,
Marc
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