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I want to serialize my protocol buffer to a char*. Is this possible? I know one can serialize to file as per:
fstream output("/home/eamorr/test.bin", ios::out | ios::trunc | ios::binary); if (!address_book.SerializeToOstream(&output)) { cerr << "Failed to write address book." << endl; return -1; } But I'd like to serialize to a C-style char* for transmission across a network.
How to do this? Please bear in mind that I'm very new to C++.
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The Protobuf serialization mechanism is given through the protoc application, this compiler will parse the . proto file and will generate as output, source files according to the configured language by its arguments, in this case, C++. You can also obtain more information about, reading the section compiler invocation.
Protocol buffers are a combination of the definition language (created in . proto files), the code that the proto compiler generates to interface with data, language-specific runtime libraries, and the serialization format for data that is written to a file (or sent across a network connection).
Protocol buffers messages always use little-endian encoding. Implementations running on big-endian architectures should be doing the conversions automatically. If you are receiving data in wrong order, I would suggest using protoc --decode_raw to see whether the error occurs on the transmission or reception side.
That's easy:
size_t size = address_book.ByteSizeLong(); void *buffer = malloc(size); address_book.SerializeToArray(buffer, size); Check documentation of MessageLite class also, it's parent class of Message and it contains useful methods.
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