Hi Michael,

Do you think it is worth mention the information listed below in the FPC Language Reference? I made DocView annotations in my local ref.inf document, but it might be useful to others as well, hence my thought of adding it to the official docs.

At first glance, I couldn't see that the 2.4.0 ref.pdf mentions this info. It does mention some times are processor dependant, but it doesn't make it as clear as below. Please correct me if I am wrong.

Op 2010-11-01 16:33, Hans-Peter Diettrich het geskryf:

...and...

Op 2010-11-01 14:23, Jonas Maebe het geskryf:

> My question was more: Is Extended usable/enabled on Win64 or is > it Extended=Double as well? Extended = double on Win64 in FPC as well.

Regards,
- Graeme -

Some other annotations I have in my ref.inf document is C Types, and how they map to Object Pascal types. Maybe this would be useful too in the official docs - after all, many developers translate/port C headers or libraries to FPC. If it will be useful to add to the docs, I'm not 100% sure if this must go in the Lang Ref or RTL docs (eg: System or CTypes units).

Some alias types I have made notes about:

DWord -> Cardinal

Long -\
clong - --> LongInt
cint -/

Short -> SmallInt
Uint -> Cardinal
ULong -> Cardianl
Handle -> DWord (Win32); LongInt(Linux)

etc...

Regards,
- Graeme -

Well, the CTypes unit is documented, so I see no need to add this ?

You should not use native pascal types when translating, always use the types from the ctypes unit. That's its purpose, after all.

Michael.

In our previous episode, Michael Van Canneyt said:

Well, the CTypes unit is documented, so I see no need to add this ? You should not use native pascal types when translating, always use the types from the ctypes unit. That's its purpose, after all.

Like for in 64-bit *nix where clong is 64-bit (ptrint) and not longint.

Op 2010-11-02 10:04, Michael Van Canneyt het geskryf:

You should not use native pascal types when translating, always use the types from the ctypes unit. That's its purpose, after all.

Until recently (thanks to Marco), I never even knew that unit existed. :-) I've been using it since then, but never actually looked if it was documented or not. If it is, then all is well.

Regards,
- Graeme -

In our previous episode, Graeme Geldenhuys said:

???!?

I never even knew that unit existed. :-)

You don't use any FPC *nix headers ? E.g. X11 ?

This is where I spotted it (and then h2pas has an option to use it, iirc). Maybe it's worth a mention in "Using external code and variables" in the manual.

Henry

Op 2010-11-02 12:19, Marco van de Voort het geskryf:

> Until recently (thanks to Marco), ???!?

I had a issue implementing XDND (drag-n-drop) protocol (worked on 32-bit, failed on 64-bit). You mentioned I used the wrong data types, and should have used the ctypes unit instead.

> I never even knew that unit existed. :-) You don't use any FPC *nix headers ? E.g. X11 ?

I never paid that much attention to the converted header units uses clause included with FPC. I was rather referring to my own converted units, or my units that need to work with C data structures. I used to use Object Pascal types in such cases, but now use the C alias types defined in ctypes.

Regards,
- Graeme -

Graeme Geldenhuys wrote

Handle -> DWord (Win32); LongInt(Linux)

Just for completeness:

Handle -> QWord (Win64)

Regards,
Sven