In Delphi 7, int64s are signed, if I try to declare a hex constant larger than $8000000000000000 (eg, what is really an uint64) I get an error. Can you advise some workarounds, please?
You can make a variant record like so
type muint64 = record
case boolean of
true: (i64 : int64);
false:(lo32, hi32: cardinal);
end;
Now you can just use the cardinals to fill your uint64 with unsigned data.
The other option would be to use code like this:
const almostmaxint64 = $800000045000000;
var muint64: int64;
begin
muint64:= almostmaxint64;
muint64:= muint64 shl 1;
end