[Kde-pim] Fwd: Re: KDE 4.4.98 (4.4 RC3)

Thiago Macieira thiago at kde.org
Mon Feb 8 12:15:25 GMT 2010

Em Domingo 7. Fevereiro 2010, às 16.33.34, argonel escreveu:
> On Sun, Feb 7, 2010 at 3:58 AM, Thiago Macieira <thiago at kde.org> wrote:
> > The protection has to happen somewhere. Technically, it's Konversation's
> > fault
> > for passing unfiltered network data into an API.
> > 
> > But it could also be a QString issue, for allowing those invalid UTF-8
> > strings
> > to be converted to UTF-16 in the first place.
> > 
> > Note that changing the D-Bus behaviour may likely introduce bugs in
> > Glib-based
> > applications, where conversions from UTF-8 do implement this check.
> > (Which, in
> > my opinion, is incomplete)
> If you're referring to dbus's lack of checks for 0x1FFFE and so on, I found
> that I was unable to create a QChar > 0xFFFF, so perhaps not checking those
> is reasonable.

Of course you can't create a QChar > 0xFFFF.

But QString can handle UTF-16 surrogate pairs and does it just fine. The 
sequence 0xD83F 0xDFFF is the U+1FFFF non-character.

The question is: should those be allowed to exist in a QString? (I think the 
answer is yes)

Should QString::toUtf8 and fromUtf8 accept those?
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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