Hi,
I have a nested message that i am trying to read using protocol
buffers. Message looks like as below
<code>
message HeaderMessage {
required double timestamp = 1;
required string ric_code = 2;
required int32 count = 3;
required int32 total_message_size = 4;
}
message CustomMessage {
required string field_name = 1;
required double value = 2;
optional HeaderMessage header = 3;
}
</code>
Here, I am setting the header field in the CustomMessage and writting
the custom message to binary output file. I know for sure that the
message is written properly to the binary file because I am able to
retrive it properly using the C# library (protobuf-net) to read the
binary file.
I am trying to read the same file using C++ protocol buffers library.
But when i read the object from coded_stream
cMsg.ParseFromCodedStream(coded_input);
I see that the header is not set in the cMsg.
I looked inside protocol buffers library. While reading the object, it
checks for if header is set or not using the following function
inline bool CustomMessage::has_header() const {
return (_has_bits_[0] & 0x00000004u) != 0;
}
Above function returns false and header object is not read.
When I am writing the object to binary file, value of _has_bits was
0x00fb6ff8 but when I am reading the custom message from the binary
file, this time the value of _has_bits is unchanged before and after
reading the object. This value is 0x0012fbcc. For this value,
has_header() function returns false.
so when I call ParseFromCodedStream function, _has_bits value is not
read properly causing a problem in reading header object.
What am I doing wrong in this case? How to resolve this issue?
Thanks for your help.
-Alok
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