[xmlsec] non us-ascii filenames in user locale

[Roumen Petrov]

Might unicode filename work only on NTFS filesystem, since NTFS store 
name in UCS-2 I guess.
Whats happen on NT when file is localted on fat12/16/32 filesystem ?


Aleksey Sanin wrote:

> > Oh, you need also an easy autoreply for all these "but it works on NT"
> > posts which follow :-)
>
> Well, the interesting thing is that it might not be that bad. We have
> this problem, because NT allows one to have Unicode filenames. Thus,
> you can have Russian filename on Windows NT box with German default
> locale. AFAIK, this does not work on Win9x and the Russian filename
> would be corrupted (i.e. it will have all these '?' characters) if
> the default locale is not Russian.
>
> A long time ago when I was doing client programming, the full solution
> for this problem was pretty complex. The interesting fact is that while
> _wfopen() function is not implemented on Win9x, the stub for this
> function is still present in MSVC runtime dll. This means that you can
> use this function in your program and the program will be loaded
> correctly (the function will be found in the dll!) but when you try to
> call it, you'll get an error back. Thus the solution was the following:
> 1) Function XYZ() always accepts UTF8 string for the filename.
> 2) In runtime, function XYZ() determines the operating system and
>    - if it is WinNT then filename is converted from UTF8 to UCS2 and
>      _wfopen() function is used
>    - if it is Win9x then filename is converted from UTF8 to current
>      locale, fopen() function is used and programmer crosses his/her
>      fingers that user never has a filename in different locale.
>
> Not sure if this is an overkill for LibXML2 or not but this is the best
> solution for this problem I know.
>
> Aleksey
>
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