Re: [Boost-users] Customizing locale of stream for Boost.Serialization seems to fail

11 Mar 2014

      Hi,

I have found the solution to my problem and posted it there:
http://stackoverflow.com/questions/22203496/deserialization-of-non-finite-fl...

Christophe Fuzier

2014-03-10 11:06 GMT+01:00 Christophe Fuzier :
...
Hi,
I have a problem with Boost.Serialization. I have posted a question on a
forum but have not got any answer until now. Here is the reproduction of my
post (note: I'm using Boost 1.48, patch level 0).
I need to use Boost.Serialization to serialize floating-point numbers.
Since NaN and infinites cannot natively be read from an input stream, I am
trying to use the facets in boost/math/special_functions. I have tested
them on my platform using code similar to the examples we can find here:
http://www.boost.org/doc/libs/1_50_0/libs/math/doc/sf_and_dist/html/math_too...
However, the following code still fails to properly unserialize non-finite
floating point values (an exception is thrown with description "input
stream error").
#include <limits>
#include <locale>
#include <sstream>
#include 
#include 
#include 
#include 
struct Data {
        float f;
Data() : f(std::numeric_limits<float>::quiet_NaN()) {}
template <class Archive>
        void serialize(Archive & ar, unsigned const)
        {
                ar & BOOST_SERIALIZATION_NVP(f);
        }
};
void test()
{
        using namespace boost::archive;
        Data d;
        std::ostringstream oss;
        xml_oarchive oar(oss);
        oar << BOOST_SERIALIZATION_NVP(d);
        //std::cout << oss.str() << std::endl;
        std::istringstream iss(oss.str());
        std::locale const new_loc(iss.getloc(), new
boost::math::nonfinite_num_get<char>);
        iss.imbue(new_loc);
        xml_iarchive iar(iss);
        iar >> BOOST_SERIALIZATION_NVP(d);
        std::cout << d.f << std::endl;
}
Am I doing something wrong? Is there a problem with my Boost version or my
platform? Is there a better solution? Any help would be greatly appreciated.
<END OF POST>
Thank you in advance for any suggestion.
Christophe Fuzier