[fpc-pascal] TPLY

[Brian Winfrey]

Thanks, I'll look into this as well.

On Fri, Oct 29, 2010 at 2:19 AM, Thierry Coq <tcoq at free.fr> wrote:
> Brian,
> thanks for the diff, I'll take it into account and publish an update.
>
> On 28/10/2010 18:50, Brian Winfrey wrote:
> ...
>>
>> The changes I made in this diff were simply to get it to compile.
>>
>> Subsequently I renamed all files and folders to lowercase, converted
>> spaces to underscores and added a prefix to eliminate duplicate file
>> names where needed.
>>
>>
>
> ...
>>>
>>> Another approach would be to look at (and reverse engineer) the byte
>>> code.
>>> If it's not obfuscated, it might even be easier to parse and port than
>>> the
>>> native Java.
>>>
>>>
>>
>> How would you suggest I proceed in that.
>>
>
> Using the class file format (for example here:
> http://en.wikipedia.org/wiki/Class_%28file_format%29),
> it would be easy to parse through the tables, identify the class name, its
> super class name, the interfaces it's implementing, and even the public and
> private methods. The java compiler has done all the work into translating
> the java code into nice tables. ;-)
> I remember I did the exercise once. I've destroyed the code, but I could do
> it again. I remember one of the more difficult parts was understanding how
> java coded strings ;-) This was before anonymous classes and methods, so
> this could be another difficulty. I don't know how these are converted to
> byte code.
> Once you have the structure, you can generate the pascal code. I would
> recommend against generating one class per unit as Java does: since pascal
> dependency rules are strict (no cycles), this would most certainly result in
> uncompilable code. What I do when I translate Java is to pre-declare all
> classes and interfaces at the top of the unit(s) and then generate the full
> class interface further down.
> Translating the statements inside the bytecode I haven't tried, since my
> efforts were mostly for analyzing java code and measuring it.
> I hope this helps,
> Thierry
>
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