--- Olivier Chapuis <[EMAIL PROTECTED]> wrote:
> On Sun, Nov 24, 2002 at 12:49:35PM -0800, Nadim Shaikli wrote:
> >
> > I do have a possible idea of what is happening.  Mikhael/Olivier, this
> > might make sense to you guys more than others :-) so let me know if you
> > want further detail off the list.  I added a continuous assignment to a
> > Form-B glyph right above the first '#if 0' in the FBidiJoin.c file (say
> > to 0xFED3) and that failed.  Which leads me to believe that unicode
> > conversion within fvwm is failing (this would also explain why the same
> > code doesn't fail outside fvwm).  Does this make sense or ring any
> > bells ?  In other words, a glyph value of 0x0641 is fine where as 0xFED3
> > seems to trigger memory stomping - the difference there is how UTF-8 is
> > represnted and converted (are all UTF-8's within fvwm represented as
> > 4-bytes since that could be the max size ? The difference in the example
> > noted above it 2-bytes vs. 3-bytes).  Am I barking up the wrong tree :-) ?
> 
> Maybe not. fvwm makes some UTF-8 conversions (others are done by
> iconv). I am not sure that these conversions are safe in certain
> case. I should take a look.

Olivier, 'FlocaleUtf8ToUnicodeStr2b' in libs/Flocale.c (lines 160-192)
looks rather suspect since it assumes all resultant unicode bytes will
occupy 2 bytes; am I reading that correctly ?  I tried man'ing the
various Xlib functions and got overwhelmed.  You might want to take a
peek at vim-6.1+ (vim.sf.net - note mbyte.c, function = utf_ptr2char).

Let me know if I can help in anyway.

Thanks.

 - Nadim


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