Nothing lines up, if I set class version then the last parameter is set. Also I think these are int's which is quite large(6 * sizefof(int)) for a packet header.

packet_ping: 44
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE boost_serialization>
<boost_serialization signature="serialization::archive" version="4">
<tst2 class_id="0" tracking_level="1" version="0" object_id="_0">
</tst2>



On Apr 14, 2008, at 4:23 PM, Robert Ramey wrote:
try using the xml_archive - all the "extra" bytes show up as labeled attributes.
 
Robert Ramey
ok I have this working, however...


packet_base: 12
packet_ping: 44
0 1 0
0 0 1001 44 2 3 7 32 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
         ^ packet actually starts here(packet_length).

There are 6 extra bytes overhead I know that 1001 is my class version. What are 0, 1, 0, 0 and 0?

I need this info for writing packet de-serialization in other languages.

Thanks in advance.

On Apr 14, 2008, at 8:21 AM, j.c. wrote:
Sweet, just what I was looking for, thanks.


On Apr 14, 2008, at 8:31 AM, Robert Ramey wrote:
lookup base_object in the documentation.
 
Robert Ramey
 
I am writing a packet base class that can be serialized. The class so far looks like:

    class packet_base
    {
        using namespace boost;
        
        public:
            packet_base();
            ~packet_base();

            friend class boost::serialization::access;
            template <typename Archive>
            void serialize(Archive & ar, const unsigned int version)
            {
                ar & m_length;
ar & m_type;
ar & m_method;
            }

        private:
        
            uint16_t m_length;
    uint16_t m_type;
    uint16_t m_method;
    };

The question now is how can I derive class A from packet_base and have both packet_base and A's variables serialized? Obviously base_class needs to be archived first so it's variables are at the front of the buffer.

Thanks in advance.
J


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