I don't unterstand __byte__ :-(_(re)

Thu, 12 Sep 1996 11:40:07 +0200 (MET DST)

Hi all,

> const
>   arHex : array[0..$0f] of char
>         = '0123456789abcdef';

Nice that this works.  I was sure it wouldn't work.  ;-)

>   a8  : array[0..max] of __byte__  Integer absolute a32;
> 
>     write(a8[i]: 10);
>   1    1     34561
>
>     write(hexa(a8[i]));
>   1 $00000001 $00000001

Symptoms:  the value of a __byte__ Integer is written correctly
via the "hexa" function, it's wrong when we simply "write" it.

This is due to a BUG in GPC's run tims system (RTS) which doesn't
(yet) know about type modifiers like __byte__ at all. :-(

For the same reason, you get run time errors when you try to
writeln __longlong__ (64-bit) Integers (\approx Comp in BP)
or __long__ Reals (Extended in BP).

To work around, do an explicit type cast:

>     write ( Integer ( a8 [ i ] ) : 10 );
>   1    1         1

Bye,

    Peter

      e-mail:  peter.gerwinski@uni-essen.de
home address:  D\"usseldorfer Str. 35, 45145 Essen, Germany
         WWW:  http://agnes.dida.physik.uni-essen.de/~peter/

Peter Gerwinski (peter@agnes.dida.physik.uni-essen.de)