On Aug 21, 2014, at 12:11 PM, Ingemar Ragnemalm <inge...@ragnemalm.se> wrote:
> On 21/08/14 07:41, Jerry wrote:
>>> I have a lot of old Pascal that I am getting interested in reviving. It was
>>> originally written in Lightspeed/THINK Pascal (did I mention it is old?)
>>> and around 2000-2002 I converted it to Codewarrior Pascal. These are both
>>> Macintosh dialects.
>>>
>>> What are the prospects of running each of these dialects under FPC? Are
>>> there compatibility flags to set? Would there be much rewriting?
>>>
>>
>> The compatibility flag to set is the compiler directive {$mode macpas} (at
>> the top of the file), or the command line switch -Mmacpas. I don't know how
>> much there would be to rewrite, but in general that switch should make the
>> accepted syntax at least quite compatible to CodeWarrior's.
>>
>>
>>> One of the things that I recall being possibly unique and possibly
>>> troublesome now is that under THINK Pascal, there was a built-in text I/O
>>> window and a built-in graphics drawing window, both of which I used. In the
>>> latter case, it was mainly MoveTo(x, y) and LineTo(x, y) stuff. When I
>>> moved to Codewarrior, I was somehow able to emulate that both text and
>>> drawing windows. I suppose the text window became a normal terminal
>>> (whatever Codewarrior offered). I can't remember if Codewarrior offered a
>>> drawing window or if I had to make a crude one using a (now) Carbon window.
>>>
>>
>> Maybe you could rewrite your code on top of TransSkel:
>> http://ragnemalm.se/lightweight/ (click on it in the navigation bar on the
>> left).
>>
>
> Thanks, Jonas!
>
> I am very comfortable in porting old Mac code to FPC. FPC implements a very
> nice and modern Pascal that handles most (but not all) old code. The only
> problem I have had is with multiply nested code that does "exit" on the
> enclosing function, which FPC can't do.
>
> You have to make your own text/drawing windows, but that is fairly easy. If
> you program for Carbon, your code can be pretty close to the old one, and you
> can even use QuickDraw, but if you want to be a bit more future safe,
> TransSkel 5 targets Cocoa, includes a partial replacement for much of the Mac
> Toolbox GUI and a future safe QuickDraw layer, QDCG, where all those
> MoveTo/LineTo should work just fine.
>
> And if you want an IDE that is somewhat similar to Think, Lightweight IDE is
> aiming in that direction. The debugger needs more work but we are quite
> active right now so the plan is to fix the remaining limitations during the
> coming months. (The latest upload was today.)
>
>
> /Ingemar
Great to know that I seem to have a good shot. I'm looking into TransSkel5 now.
Thanks for the help!
Jerry
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