uments an alternative API to fetch values for the C basic types.

/** set_size(+Name:atom, +Width:int, +Height:int) is det.

static foreign_t
set_size(term_t name, term_t width, term_t height)
{ char *n;
  int w, h;

  if ( !PL_get_chars(name, &n, CVT_ATOM|CVT_EXCEPTION) ||
       !PL_get_integer_ex(with, &w) ||
       !PL_get_integer_ex(height, &h) )
    return FALSE;

  ...

}