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

Subject: Re: [Boost-users] [archive] binary archive to memory stream
From: Michael Powell (mwpowellhtx_at_[hidden])
Date: 2014-06-18 18:20:37

On Wed, Jun 18, 2014 at 10:56 AM, John Maddock <boost.regex_at_[hidden]> wrote:
>> 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<uint8_t> 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?

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...

> HTH, John.
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