[fpc-devel] Widestrings in win32

[Martin Schreiber]

On Saturday 16 June 2007 10.10, Daniël Mantione wrote:
> Op Sat, 16 Jun 2007, schreef Martin Schreiber:
> > On Saturday 16 June 2007 08.57, Daniël Mantione wrote:
> > > Op Sat, 16 Jun 2007, schreef Martin Schreiber:
> > > > Hi,
> > > > It seems that CG plans to implement an non BSTR widestring type for
> > > > win32:
> > > > http://groups.google.ch/group/borland.public.delphi.non-technical/msg
> > > >/7ca eced42f1934a4?hl=en&
> > > >
> > > > The introduced string handling for the "Unicode VCL" is equivalent to
> > > > the string handling in MSEgui BTW.
> > >
> > > Noted. As COM incompatibilty seems preferable over not working
> > > widestrings, shall I disable the winlikewidestring in 2.1.5?
> >
> > I would appreciate very much. If you can do so, I could restart the
> > testing and debugging  of FPC 2.2.
>
> I made the change, could you please test for any problems, as we are
> really close to 2.2.0.
>
MSEide+MSEgui compiles and works with FPC fixes_2_2 on win32 and Linux, thanks 
a lot!
I found two issues up to now: Mantis 9093 and 9094.

Martin
> > > Can someone reply Allan Bauer about using ptrint, and better, ptruint
> > > (explain pitfalls). It seems I have been banned from that newsgroup
> > > yesterday, without any apparent reason :(
> >
> > Please post on this list what you want to write to him, I'll try to feed
> > forward.
>
> Something like this?
>
> "Note that casting pointers to signed values is often a bad idea, since
> the virtual address space on a 32-bit system is often 3 gigabytes, i.e.
> pointers can have values between $80000000..$c0000000. A signed type
> causes trouble in pointer value comparisons (like if p>q then).
>
> In Free Pascal there already exist two types ptrint and ptruint (signed
> and unsigned) for this purpose, you might want to recycle them especially
> as many people are currently using constructions like:
>
> {$ifndef FPC}
> type ptruint=longword;
> {$endif}
>
> ... in order to be able to get their code to work on Win64 using FPC; this
> will make it easier for people to switch back to Delphi for 64-bit
> development when it is ultimately released."
>
> Daniël