Problem with locales

[Carlo Agrusti <carlo-ag libero it>]

Hello all,

I'm having a strange behaviour when retrievieng numeric values from a 
GtkEntry widget; somewhere into my code I set a numeric value as:

  gtk_entry_set_text (GTK_ENTRY (enThick), "3.45");

then elsewhere I retrieve such a value with:

G_CONST_RETURN gchar * gcPdi;
gfloat                 thick;
[...]

  gcPdi = gtk_entry_get_text (GTK_ENTRY (enThick));
  sscanf (gcPdi, "%f", & thick);

If I inspect the variables I find: gcPdi = "3.45" and  thick = 3; 
instead with:

  gtk_entry_set_text (GTK_ENTRY (enThick), "3,45");

I find: gcPdi = "3,45" and thick = 3.45

This could be normal if we consider that current locale is it_IT euro, 
which has as default "," as decimal separator; what I cannot understand 
is how "sscanf", which is a standard C function, can follow locale 
rules. The second aspect of this issue is that the same application 
doesn't show this behaviour under windows.

Any idea?

TIA