auto proto_des =
google::protobuf::DescriptorPool::generated_pool()->FindMessageTypeByName(typeName);
auto proto_type =
google::protobuf::MessageFactory::generated_factory()->GetPrototype(descriptor);
auto protobuf_message = type->New();
protobuf_message->ParseFromArray(buf, len);
when we know "typeName",
we can get protobuf_message from an knowned length buf.
if we dont know "typeName", but we know this length of buf is of couse a
protobuf message!!!
can we unserialize this buf to an protobuf message instance??
just like c struct:
struct T
{
int v;
};
T a;
a.v = 5;
char buf[128] = {0};
memcpy(buf, &a, sizeof(T));
T b;
memcpy(&b, buf, sizeof(T));
/////
we can get b.v = 5;
can protobuf just act like this??
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