I started to use boost's serialization code to write data to a binary stream. I get the following warnings which could be disabled (D_SCL_SECURE_NO_WARNINGS) but I wonder if it is safe to do so? How can I get more specific information which code of mine causes the warning? I only know the .cpp file.
This is the output from Visual Studio 2008:
4>g:\winlib\boost\1_42_0\boost/archive/basic_binary_iprimitive.hpp(162) : warng C4996: 'std::basic_streambuf<_Elem,_Traits>::sgetn': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
4> E:\Visual Studio 9.0\VC\include\streambuf(121) : see declaration of 'std::basic_streambuf<_Elem,_Traits>::sgetn'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iprimitive.hpp(152) : while compiling class template member function 'void boost::archive::basic_binary_iprimitive<Archive,Elem,Tr>::load_binary(void *,size_t)'
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(107) : see reference to function template instantiation 'void boost::archive::basic_binary_iprimitive<Archive,Elem,Tr>::load<T>(T &)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(356) : see reference to function template instantiation 'void boost::archive::load_access::load_primitive<Archive,T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(433) : see reference to function template instantiation 'void boost::archive::detail::load_non_pointer_type<Archive>::load_primitive::invoke<T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(580) : see reference to function template instantiation 'void boost::archive::detail::load_non_pointer_type<Archive>::invoke<T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/common_iarchive.hpp(68) : see reference to function template instantiation 'void boost::archive::load<Archive,T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iarchive.hpp(67) : see reference to function template instantiation 'void boost::archive::detail::common_iarchive<Archive>::load_override<T>(T &,int)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/binary_iarchive_impl.hpp(50) : see reference to function template instantiation 'void boost::archive::basic_binary_iarchive<Archive>::load_override<T>(T &,int)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/interface_iarchive.hpp(61) : see reference to function template instantiation 'void boost::archive::binary_iarchive_impl<Archive,Elem,Tr>::load_override<T>(T &,int)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iarchive.hpp(77) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_iarchive<Archive>::operator >><unsigned char>(T &)' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iarchive.hpp(74) : while compiling class template member function 'void boost::archive::basic_binary_iarchive<Archive>::load_override(boost::archive::version_type &,int)'
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/binary_iarchive_impl.hpp(36) : see reference to class template instantiation 'boost::archive::basic_binary_iarchive<Archive>' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/binary_iarchive.hpp(42) : see reference to class template instantiation 'boost::archive::binary_iarchive_impl<Archive,Elem,Tr>' being compiled
4> with
4> [
4> Archive=boost::archive::naked_binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>
4> ]
4>g:\winlib\boost\1_42_0\boost/archive/basic_binary_iprimitive.hpp(176) : warning C4996: 'std::basic_streambuf<_Elem,_Traits>::sgetn': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
4> E:\Visual Studio 9.0\VC\include\streambuf(121) : see declaration of 'std::basic_streambuf<_Elem,_Traits>::sgetn'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
4>g:\winlib\boost\1_42_0\boost/archive/basic_binary_iprimitive.hpp(162) : warning C4996: 'std::basic_streambuf<_Elem,_Traits>::sgetn': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
4> E:\Visual Studio 9.0\VC\include\streambuf(121) : see declaration of 'std::basic_streambuf<_Elem,_Traits>::sgetn'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iprimitive.hpp(152) : while compiling class template member function 'void boost::archive::basic_binary_iprimitive<Archive,Elem,Tr>::load_binary(void *,size_t)'
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(107) : see reference to function template instantiation 'void boost::archive::basic_binary_iprimitive<Archive,Elem,Tr>::load<T>(T &)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(356) : see reference to function template instantiation 'void boost::archive::load_access::load_primitive<Archive,T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(433) : see reference to function template instantiation 'void boost::archive::detail::load_non_pointer_type<Archive>::load_primitive::invoke<T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/iserializer.hpp(580) : see reference to function template instantiation 'void boost::archive::detail::load_non_pointer_type<Archive>::invoke<T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/common_iarchive.hpp(68) : see reference to function template instantiation 'void boost::archive::load<Archive,T>(Archive &,T &)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iarchive.hpp(67) : see reference to function template instantiation 'void boost::archive::detail::common_iarchive<Archive>::load_override<T>(T &,int)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/binary_iarchive_impl.hpp(50) : see reference to function template instantiation 'void boost::archive::basic_binary_iarchive<Archive>::load_override<T>(T &,int)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/detail/interface_iarchive.hpp(61) : see reference to function template instantiation 'void boost::archive::binary_iarchive_impl<Archive,Elem,Tr>::load_override<T>(T &,int)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iarchive.hpp(77) : see reference to function template instantiation 'Archive &boost::archive::detail::interface_iarchive<Archive>::operator >><unsigned char>(T &)' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> T=unsigned char
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/basic_binary_iarchive.hpp(74) : while compiling class template member function 'void boost::archive::basic_binary_iarchive<Archive>::load_override(boost::archive::version_type &,int)'
4> with
4> [
4> Archive=boost::archive::binary_iarchive
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/binary_iarchive_impl.hpp(36) : see reference to class template instantiation 'boost::archive::basic_binary_iarchive<Archive>' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive
4> ]
4> g:\winlib\boost\1_42_0\boost/archive/binary_iarchive.hpp(76) : see reference to class template instantiation 'boost::archive::binary_iarchive_impl<Archive,Elem,Tr>' being compiled
4> with
4> [
4> Archive=boost::archive::binary_iarchive,
4> Elem=char,
4> Tr=std::char_traits<char>
4> ]
4>g:\winlib\boost\1_42_0\boost/archive/basic_binary_iprimitive.hpp(176) : warning C4996: 'std::basic_streambuf<_Elem,_Traits>::sgetn': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
4> E:\Visual Studio 9.0\VC\include\streambuf(121) : see declaration of 'std::basic_streambuf<_Elem,_Traits>::sgetn'
4> with
4> [
4> _Elem=char,
4> _Traits=std::char_traits<char>
4> ]
Thanks!
If you trust Boost not to pass out-of-range parameters, you can disable the warnings.
Microsoft has proposed a set of new "more secure" functions for the C library,
http://www.open-std.org/JTC1/SC22/WG14/www/docs/n1225.pdf
and are warning everyone who uses the old ones.
You could perhaps also try a newer Boost library? The lastest is 1.46.1