Protobuf在C/C++中的应用

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2014-08-11 wcdj

https://github.com/gerryyang/mac-utils/tree/master/tools/protobuf/examples

官网：https://code.google.com/p/protobuf/

Protocol Buffers

What is it?

Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. Google uses Protocol Buffers for almost all of its internal RPC protocols and file formats.

Latest Updates

http://protobuf.googlecode.com/svn/trunk/CHANGES.txt

Documentation

Read the documentation.

Discussion

Visit the discussion group.

Quick Example

You write a .proto file like this:

message Person {  required int32 id = 1;  required string name = 2;  optional string email = 3;}

Then you compile it with protoc, the protocol buffer compiler, to produce code in C++, Java, or Python.

Then, if you are using C++, you use that code like this:

Person person;person.set_id(123);person.set_name("Bob");person.set_email("bob@example.com");fstream out("person.pb", ios::out | ios::binary | ios::trunc);person.SerializeToOstream(&out);out.close();

Or like this:

Person person;fstream in("person.pb", ios::in | ios::binary);if (!person.ParseFromIstream(&in)) {  cerr << "Failed to parse person.pb." << endl;  exit(1);}cout << "ID: " << person.id() << endl;cout << "name: " << person.name() << endl;if (person.has_email()) {  cout << "e-mail: " << person.email() << endl;}

For a more complete example, see the tutorials.

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