Please read the tutorial:
http://code.google.com/apis/protocolbuffers/docs/cpptutorial.html
On Fri, Mar 12, 2010 at 7:39 PM, mk <apollo...@gmail.com> wrote:
> Hi,
>
> Could someone please help me with serialization/deserialization
> classes defined in .proto (protobuf). here is an exp that I am trying
> to build (see server where I get error):
>
> file.proto
>
> message Data{
> required string x1 = 1;
> required uint32 x2 = 2;
> required float x3 = 3;
> }
> message DataExge {
> repeated Data data = 1;
> }
>
> client.cpp
> ...
> void serialize(const DataExge &data_snd){
> try {
> ofstream ofs("DataExge");
> data_snd.SerializeToOstream(&ofs);
>
> } catch(exception &e) {
> cerr << "serialize/exception: " << e.what() << endl;
> exit(1);
> }
> }
>
> void deserialize(DataExge &data_rec){
> try {
> ifstream ifs("DataExge");
> data_rec.ParseFromIstream(&ifs);
>
> } catch(exception& e) {
> cerr << "deserialize/exception: " << e.what() << endl;
> exit(1);
> }
> }
>
> int main(){
> ...
> DataExge dataexge;
> Data *dat = dataexge.add_data();
>
> char *y1 = "operation1";
> uint32_t y2 = 123 ;
> float y3 = 3.14;
>
> // assigning data to send()
> dat->set_set_x1(y1);
> dat->set_set_x2(y2);
> dat->set_set_x3(y3);
>
> //sending data to the client
> serialize(dataexge);
>
> if (send(socket, &dataexge, sizeof(dataexge), 0) < 0) {
> cerr << "send() failed" ;
> exit(1);
> }
>
> //receiving data from the server
> deserialize(dataexge);
>
> if (recv(socket, &dataexge, sizeof(dataexge), 0) < 0) {
> cerr << "recv() failed";
> exit(1);
> }
>
> //printing received data
> cout << dat->x1() << "\n";
> cout << dat->x2() << "\n";
> cout << dat->x3() << "\n";
> ...
> }
>
> server.cpp
> ...
> void serialize(const DataExge &data_snd){
> try {
> ofstream ofs("DataExge");
> data_snd.SerializeToOstream(&ofs);
>
> } catch(exception &e) {
> cerr << "serialize/exception: " << e.what() << endl;
> exit(1);
> }
> }
>
> void deserialize(DataExge &data_rec){
> try {
> ifstream ifs("DataExge");
> data_rec.ParseFromIstream(&ifs);
>
> } catch(exception& e) {
> cerr << "deserialize/exception: " << e.what() << endl;
> exit(1);
> }
> }
>
> int main(){
> ...
> DataExge dataexge;
> Data *dat = dataexge.add_data();
>
> //receiving data from the client
> deserialize(dataexge);
>
> if (recv(socket, &dataexge, sizeof(dataexge), 0) < 0) {
> cerr << "recv() failed";
> exit(1);
> }
>
> //printing received data
> cout << dat->x1() << "\n";
> cout << dat->x2() << "\n";
> cout << dat->x3() << "\n";
>
> // assigning data to send()
> dat->set_set_x1("operation2");
> dat->set_set_x2(dat->x2() + 1);
> dat->set_set_x3(dat->x3() + 1.1);
>
> //sending data to the client
> serialize(dataexge); //... I am getting error at this line ...
>
> if (send(socket, &dataexge, sizeof(dataexge), 0) < 0) {
> cerr << "send() failed" ;
> exit(1);
> }
> ...
> }
>
> Thanks for your help and replies -
>
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