Hye,

this little program fail in serialization of a float with binary archive but success with xml or text archive ??

as i am not an expert, i have now idea why ???

i have the save problem with double and like with float, only depending of the value ....

it fails under windows XP, VC++7.1 but success under Linux + gcc

thanks for helping ,

Stéphane.

// problemeserialisation.cpp

#include <iostream>
#include <fstream>
#include <boost/archive/text_oarchive.hpp>
#include <boost/archive/text_iarchive.hpp>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <boost/archive/xml_oarchive.hpp>
#include <boost/archive/xml_iarchive.hpp>

void test_binary (float & f)
{
using namespace std ;
std::ofstream ofs("val.bin");
boost::archive::binary_oarchive oa(ofs,std::ios::binary);
oa<< f ;
ofs.close();
std::cout << "Valeur serialisee binary " << f << std::endl ;
std::ifstream ifs("val.bin");
boost::archive::binary_iarchive ia(ifs,std::ios::binary);
float f1;
ia >> f1;

if (ifs.fail())
{
  cout << "badbit " << ( ifs.rdstate( ) & ios::badbit ) << endl;
  cout << "failbit " << ( ifs.rdstate( ) & ios::failbit ) << endl;
  cout << "eofbit " << ( ifs.rdstate( ) & ios::eofbit ) << endl;
}

std::cout << "Valeur deserialisee binary "<< f1 << std::endl ;
ifs.close();
return ;
}

void test_text (float & f)
{
std::ofstream ofs("val.txt");
boost::archive::text_oarchive oa(ofs);
oa << f ;
ofs.close();
std::cout << "Valeur serialisee Texte " << f << std::endl ;
std::ifstream ifs("val.txt");
boost::archive::text_iarchive ia(ifs);
float f2 ;
ia >> f2;
std::cout << "Valeur deserialisee Texte "<< f2 << std::endl ;
ifs.close();
return ;
}

void test_xml (float & f)
{
std::ofstream ofs("val.xml");
boost::archive::xml_oarchive oa(ofs);
oa << BOOST_SERIALIZATION_NVP(f) ;
ofs.close();
std::cout << "Valeur serialisee Xml " << f << std::endl ;
std::ifstream ifs("val.xml");
boost::archive::xml_iarchive ia(ifs);
float f2 ;
ia >> BOOST_SERIALIZATION_NVP(f2);
std::cout << "Valeur deserialisee Xml "<< f2 << std::endl ;
ifs.close();
return ;
}

int main (int argc, const char * argv[])
{
float f1 = (float)2.411667 ;
test_text(f1);
test_xml(f1);
test_binary(f1);
return 0;
}

output :

Valeur serialisee Texte 2.41167
Valeur deserialisee Texte 2.41167
Valeur serialisee Xml 2.41167
Valeur deserialisee Xml 2.41167
Valeur serialisee binary 2.41167
badbit 0
failbit 2
eofbit 1
Valeur deserialisee binary -1.07137e+008