Re: [Boost-users] Problem with Serialization: invalid signature

Subject: Re: [Boost-users] Problem with Serialization: invalid signature
From: Alexander Striffeler (a.striffeler_at_[hidden])
Date: 2013-04-04 10:18:12

Hi Stefan

Thank you very much for your answer!

> (sent data through network?),  ...,
That's what I'm actually up to (omnet) in the end, but I thought of just 
writing some sample code to ban such side effects. For the problem 
described in my original post, I've only used the lines stated there (no 
other archives).

I'll just have a closer look at your archive code, thanks a lot!

On 04.04.2013 15:39, Stefan Strasser wrote:
> Zitat von Alexander Striffeler <a.striffeler_at_[hidden]>:
>
>> However, both variants returned an invalid signature exception even 
>> though I haven't changed anything on the serialized data.
>
> I cant think of a good reason why this would happen with your code. 
> invalid_signature is only thrown if the archive signature isnt found 
> at the beginning of the archive. so you should receive this exception 
> before deserializing any objects.
>
> could be because the archive was created with the no_header flag, or 
> missing ios::binary, or using a binary archive that was created on a 
> different architecture (sent data through network?), ..., but none of 
> that is in your code example. if you're not using old archives created 
> by other code: no idea.
>
> however, since you seem to also serialize individual objects, you 
> might be interested in this archive: http://pastebin.com/PTdRE8tR
>
> it serializes objects directly to a std::vector<char> or any other 
> char container, circumventing streams. The Serialization library is 
> only invoked on demand, if your objects are track_never and 
> object_serializable no Serialization archive is constructed.
>
> constructing a binary_oarchive for each object can be quite expensive 
> (codecvt construction, pimpl construction, archive internals for 
> pointer tracking, ...)
>
>
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