static void
record_point (EMACS_INT pt)
{
int at_boundary;
/* Don't record position of pt when undo_inhibit_record_point holds. */
if (undo_inhibit_record_point)
return;
/* Allocate a cons cell to be the undo boundary after this command. */
if (NILP (pending_boundary))
pending_boundary = Fcons (Qnil, Qnil);
if ((current_buffer != last_undo_buffer)
/* Don't call Fundo_boundary for the first change. Otherwise we
risk overwriting last_boundary_position in Fundo_boundary with
PT of the current buffer and as a consequence not insert an
undo boundary because last_boundary_position will equal pt in
the test at the end of the present function (Bug#731). */
&& (MODIFF > SAVE_MODIFF))
Fundo_boundary ();
last_undo_buffer = current_buffer;
if (CONSP (BVAR (current_buffer, undo_list)))
{
/* Set AT_BOUNDARY to 1 only when we have nothing other than
marker adjustment before undo boundary. */
Lisp_Object tail = BVAR (current_buffer, undo_list), elt;
while (1)
{
if (NILP (tail))
elt = Qnil;
else
elt = XCAR (tail);
if (NILP (elt) || ! (CONSP (elt) && MARKERP (XCAR (elt))))
break;
tail = XCDR (tail);
}
at_boundary = NILP (elt);
}
else
at_boundary = 1;
if (MODIFF <= SAVE_MODIFF)
record_first_change ();
/* If we are just after an undo boundary, and
point wasn't at start of deleted range, record where it was. */
if (at_boundary
&& current_buffer == last_boundary_buffer
&& last_boundary_position != pt)
BVAR (current_buffer, undo_list)
= Fcons (make_number (last_boundary_position), BVAR (current_buffer, undo_list));
}
static void
CHECK_MARKER (Lisp_Object x)
{
CHECK_TYPE (MARKERP (x), Qmarkerp, x);
}
