The function inc-pointer
will return a new-pointer pointing
offset bytes past pointer.
CFFI> (foreign-string-alloc "Common Lisp") => #<A Mac Pointer #x102EA0> CFFI> (inc-pointer * 7) => #<A Mac Pointer #x102EA7> CFFI> (foreign-string-to-lisp *) => "Lisp"
incf-pointer
make-pointer
pointerp
null-pointer
null-pointer-p