C++ ShiftJIS to UTF8 conversion

I need to convert Doublebyte characters. In my special case Shift-Jis into something better to handle, preferably with standard C++.

the following Question ended up without a workaround:Doublebyte encodings on MSVC (std::codecvt): Lead bytes not recognized

So is there anyone with a suggestion or a reference on how to handle this conversion with C++ standard?