Re: [Boost-users] [archive] binary archive to memory stream

On Wed, Jun 18, 2014 at 5:20 PM, Michael Powell wrote:

On Wed, Jun 18, 2014 at 10:56 AM, John Maddock wrote:

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I am wrapping my head around archive, specifically binary archive.

I'd like to serialize a vector of objects in such a way, I need to capture intermediate vector buffers (literally, to vector of uint8_t) so that I can determine their sizes.

After which point the parent object(s) can serialize to file using more conventional, built-in file streams and such.

It seems that binary_oarchive is helpful, but still requires there be an ostream or streambuf in the mix. Which, as an adapter layer, while helpful, it still leaves the question of extending streambuf to work with ostream to vector open.

I've read some docs on vectors and streambuf, but they all seem to be geared towards a known-size vector, istream and such. I am interested in a vector that can be streamed to, will grow in size, etc. Some clues seem to hint at underflow, overflow type issues?

Any helpful pointers how to go about doing this?

Rather than serializing to a vector, can you not serialize to a stringstream opened in binary mode? I believe that will still give you all the information you require?

It works. If I really wanted to I could throw the Boost decoration on top of it, but so far not necessary. Thanks.

So far so good I think. This is binary data, not "string" data. Or at least, not to be confused with C-style-string, null-terminator characters, per se. No chance of that being the case with stringstream, extracting using the str() function, and so on?

Thank you...

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HTH, John. _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users