Re: charset issue on Windows help needed

[Emmanuel Thomas-Maurin <manutm007 gmail com>]

I've had a similar problem previously, with non-ascii (for instance 
cyrillic) user names in app data dir on windows. The trick was to use 
'wide char' win32 API functions which all return UTF-16 encoded strings, 
then convert to UTF-8 (with g_utf16_to_utf8()).


On 09/11/2014 03:25 AM, Fernando Rodriguez wrote:
> On Wednesday 10 September 2014 5:07:03 PM Fernando Rodriguez wrote:
> > On Wednesday 10 September 2014 7:37:28 PM Geert Janssens wrote:
> > > Hi,
> > >
> > > I'm stuck on the following issue. Program is GnuCash on Windows.
> > >
> > > Consider the following code snippet:
> > >
> > > struct stat statbuf;
> > > gchar* dirname = g_strdup(g_getenv("GNC_DOTGNUCASH_DIR");
> > > gint rc = g_stat (dirname, &statbuf);
> > >
> > > switch (errno)
> > > {
> > >
> > >    case ENOENT:
> > >      // Directory doesn't exist
> > >      // Here is code to create it which I cut for brevity
> > >      break;
> > >
> > >    case EACCES:
> > >      // Directory can't be accessed
> > >      exit(1);
> > >
> > >    case ENOTDIR:
> > >      // Not a directory
> > >      exit(1);
> > >
> > >    default:
> > >      // Unknown error
> > >      exit(1);
> > >
> > > }
> > >
> > > // Continue code with valid, existing directory
> > > ...
> > >
> > > So this snippet reads the value of environment variable GNC_DOTGNUCASH_DIR
> > > and tests whether this is a valid directory.
> > >
> > > This works fine when GNC_DOTGNUCASH_DIR uses a limited character set like
> > > ascii. For example when set to "c:\gcdev\geert" this works well and the
> > > code continues.
> > >
> > > However if set to for example:
> > > c:\gcdev\Łukasz
> > > Things go wrong (note the unusual Ł).
> > >
> > > In this case the code branches into case ENOENT and creates a directory
> > > named c:\gcdev\Lukasz (note the plain L now)
> > > Before it continues.
> > >
> > > Setting a breakpoint at rc=g_stat... and examining the value of dirname at
> > > that point also shows it to have a value of c:\gcdev\Lukasz (with plain
> > > L).
> > >
> > > So it seems I'm losing diacritical information here and I can't pass the
> > > right directory to my code to use.
> > >
> > > What should I do to get the real value from the environment to be able to
> > > access the true directory ?
> > >
> > > Thanks,
> > >
> > > Geert
> > >
> > > P.S. my locale settings are all "Dutch_Belgium.1252" except for LC_ALL
> > > which is empty. _______________________________________________
> > > gtk-app-devel-list mailing list
> > > gtk-app-devel-list gnome org
> > > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
> >
> > Well gchar is a typedef for char so it only supports ascii. I think you'll
> > probably have to use Win32 API calls on Windows to access multibyte file
> > names.
> >
> > Also according to the documentation you should use GStatBuf instead of
> > struct stat on Windows to get consistent behaviour on different compilers.
> >
> >
> >
> > _______________________________________________
> > gtk-app-devel-list mailing list
> > gtk-app-devel-list gnome org
> > https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
>
> Actually try using g_utf8_strncpy() instead of g_strdup(). I'm not sure if
> that'll get you all the way as the docs say g_stat calls the standard library
> functions and AFAIK those dont support unicode/multibyte filenames.
>
>
>
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list gnome org
> https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list


--
Emmanuel Thomas-Maurin