On 17 Nov 2009, at 10:17, Aleksa Todorovic wrote: > On Tue, Nov 17, 2009 at 10:05, Jonas Maebe <jonas.ma...@elis.ugent.be> wrote: >> >> Replace the PtrUInt types casts with PByte (or Pointer) type casts. >> > > Does that mean that (PByte(p) + N) = (Pointer(p) + N) for > pointer-castable p and integer N?
Yes. The general rule is that adding an ordinal N to a pointer type P increases P by the size of the type this pointer points to times N. Sizeof(pbyte^) = sizeof(byte) = 1. Pointer is a special case since it's untyped (sizeof(pointer^) = 0 in the FPC), and adding an ordinal N to an untyped pointer also increases its value by N. Jonas_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
