2012/8/23 Antony Riakiotakis <[email protected]>
> Hi, I have found traces of a discussion in the MinGW mailing lists about
> including w_char support in fstream. Since we do support wide (and,
> consequently special unicode) characters in blender and the lack of such
> functionality is evident on our MinGW64 builds, I'd like to know the state
> of affairs. Has this patch been included in MinGW? Is there a define to
> enable it?
>
What exactly so you mean? I submitted a patch (which was not accepted due
to IMO stupid reasons) to libstdc++ to allow the MS extensions that allow
you to open fstreams with wchar_t/wstring filenames.
wfstream has always supported extracting wchar_t's from a file, but such
functionality is ridiculously nonportable (endianness and more so
sizeof(wchar_t)).
You can work around this by tapping into libstc++'s extension headers. This
is how I fixed it in my code:
#if _WIN32
# if __GLIBCXX__
#include <ext/stdio_filebuf.h>
unique_ptr<istream> open_ifstream(const string& filename)
{
FILE* c_file = _wfopen(convert_to_utf16(filename).c_str(), L"r");
__gnu_cxx::stdio_filebuf<char>* buffer = new
__gnu_cxx::stdio_filebuf<char>(c_file, std::ios_base::in, 1);
return std::unique_ptr<istream>(new istream(buffer));
}
unique_ptr<ostream> open_ofstream(const string& filename)
{
FILE* c_file = _wfopen(convert_to_utf16(filename).c_str(), L"w+");
__gnu_cxx::stdio_filebuf<char>* buffer = new
__gnu_cxx::stdio_filebuf<char>(c_file, std::ios_base::out, 1);
return unique_ptr<ostream>(new ostream(buffer));
}
# elif _MSC_VER
unique_ptr<ifstream> open_ifstream(const string& filename)
{
return unique_ptr<ifstream>(new ifstream(convert_to_utf16(filename)));
}
unique_ptr<ofstream> open_ofstream(const string& filename)
{
return unique_ptr<ofstream>(new ofstream(convert_to_utf16(filename)));
}
# else
// Warning! unknown fstream implementation - no unicode filename support
unique_ptr<ifstream> open_ifstream(const string& filename)
{
return unique_ptr<ifstream>(new ifstream(filename));
}
unique_ptr<ofstream> open_ofstream(const string& filename)
{
return unique_ptr<ofstream>(new ofstream(filename));
}
Obviously you can replace the smart pointers with something else (and
you need to cater for the UTF-16 filename, but you get the idea.
If this is not what you mean, please link to the relevant discussion
or specify more clearly what you're talking about.
Ruben
>
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