On Mon, Aug 24, 2009 at 4:17 PM, Jay Thomas<jaydianetho...@gmail.com> wrote: > > This code ideally has to operate with C# code on the other side of the > socket that uses the DeserializeWithLengthPrefix() method call. The > message originates in C++ environment on a linux box and terminates in > C# environment on a windows PC.
I'm not familiar with the implementation of DeserializeWithLengthPrefix(). The same idea should work, but you'll have to go into the protobuf-net source to see what it uses to write the length with. If it's not a Varint32 then just adjust it to whatever it needs to be. > Why doesn't C++ support the same methods as C#? They're different projects. protobuf-net has a different maintainer than the protobuf project. > The only document that I've seen that has list of > methods available is the message.h header file, installed into my > Linux usr directory. This is the documentation for the generated C++ code, which really just deals with the fields that are generated by the protoc compliler: http://code.google.com/apis/protocolbuffers/docs/reference/cpp-generated.html This is the documentation for the C++ library as a whole: http://code.google.com/apis/protocolbuffers/docs/reference/cpp/index.html This is the documentation for the C++ version of Message: http://code.google.com/apis/protocolbuffers/docs/reference/cpp/google.protobuf.message.html This is the documentation for the coded_stream stuff I was talking about: http://code.google.com/apis/protocolbuffers/docs/reference/cpp/google.protobuf.io.coded_stream.html#CodedInputStream.Limit.details --Pete > > > On Aug 24, 4:05 pm, Peter Keen <peter.k...@gmail.com> wrote: >> You sort of have to roll your own. In my project I'm doing something like >> this: >> >> coded_output->WriteVarint32(message->ByteSize()); >> message->SerializeToCodedStream(coded_output); >> >> And then on the reading side: >> >> uint32_t size; >> if (! coded_input->ReadVarint32(&size)) { >> return NULL; // just an example. probably don't want to do this; >> >> } >> >> Message * m = new Message; >> CodedInputStream::Limit limit = coded_input->PushLimit(size); >> message->ParseFromCodedStream(coded_input); >> coded_input->PopLimit(limit); >> >> The biggest thing that helped me along was finding the Limit docs. I >> couldn't figure out how to parse from a ZeroCopyInputStream without >> consuming the entire stream, and then I ran across that and everything >> became much more clear. >> >> --Pete >> >> On Mon, Aug 24, 2009 at 3:54 PM, Jay Thomas<jaydianetho...@gmail.com> wrote: >> >> > Hello >> >> > I am looking for a way to serialize/deserialize with length prefix >> > under c++. The serialized bytes will sent to a TCP socket. I am >> > aware that C# has a method SerializeWithLengthPrefix() and >> > DeserializeWithLengthPrefix(). Are there any such analogous methods >> > for C++? Please point out any documentation that I may have missed >> > here. >> >> > Thanks for any assistance. >> >> > Jay > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
