Inline functions to examine and change buffer overlays.

* buffer.c (unchain_both): New function.
* buffer.h (buffer_get_overlays, buffer_set_overlays):
(buffer_has_overlays): New function.
(enum overlay_type): New enum.
* alloc.c, buffer.c, editfns.c, fileio.c, indent.c:
* insdel.c, intervals.c, print.c, xdisp.c: Adjust users.
This commit is contained in:
Dmitry Antipov 2012-08-08 18:47:11 +04:00
parent d9f9b46541
commit 4cb3e6b38a
11 changed files with 144 additions and 77 deletions

View file

@ -1,3 +1,13 @@
2012-08-08 Dmitry Antipov <dmantipov@yandex.ru>
Inline functions to examine and change buffer overlays.
* buffer.c (unchain_both): New function.
* buffer.h (buffer_get_overlays, buffer_set_overlays):
(buffer_has_overlays): New function.
(enum overlay_type): New enum.
* alloc.c, buffer.c, editfns.c, fileio.c, indent.c:
* insdel.c, intervals.c, print.c, xdisp.c: Adjust users.
2012-08-08 Dmitry Antipov <dmantipov@yandex.ru>
Inline functions to examine and change buffer intervals.

View file

@ -5831,8 +5831,8 @@ mark_buffer (struct buffer *buffer)
a special way just before the sweep phase, and after stripping
some of its elements that are not needed any more. */
mark_overlay (buffer->overlays_before);
mark_overlay (buffer->overlays_after);
mark_overlay (buffer_get_overlays (buffer, OV_BEFORE));
mark_overlay (buffer_get_overlays (buffer, OV_AFTER));
/* If this is an indirect buffer, mark its base buffer. */
if (buffer->base_buffer && !VECTOR_MARKED_P (buffer->base_buffer))

View file

@ -474,8 +474,10 @@ clone_per_buffer_values (struct buffer *from, struct buffer *to)
memcpy (to->local_flags, from->local_flags, sizeof to->local_flags);
to->overlays_before = copy_overlays (to, from->overlays_before);
to->overlays_after = copy_overlays (to, from->overlays_after);
buffer_set_overlays
(to, copy_overlays (to, buffer_get_overlays (from, OV_BEFORE)), OV_BEFORE);
buffer_set_overlays
(to, copy_overlays (to, buffer_get_overlays (from, OV_AFTER)), OV_AFTER);
/* Get (a copy of) the alist of Lisp-level local variables of FROM
and install that in TO. */
@ -674,21 +676,22 @@ delete_all_overlays (struct buffer *b)
{
struct Lisp_Overlay *ov, *next;
for (ov = b->overlays_before; ov; ov = next)
for (ov = buffer_get_overlays (b, OV_BEFORE); ov; ov = next)
{
drop_overlay (b, ov);
next = ov->next;
ov->next = NULL;
}
for (ov = b->overlays_after; ov; ov = next)
for (ov = buffer_get_overlays (b, OV_AFTER); ov; ov = next)
{
drop_overlay (b, ov);
next = ov->next;
ov->next = NULL;
}
b->overlays_before = b->overlays_after = NULL;
buffer_set_overlays (b, NULL, OV_BEFORE);
buffer_set_overlays (b, NULL, OV_AFTER);
}
/* Reinitialize everything about a buffer except its name and contents
@ -716,8 +719,8 @@ reset_buffer (register struct buffer *b)
b->auto_save_failure_time = 0;
BVAR (b, auto_save_file_name) = Qnil;
BVAR (b, read_only) = Qnil;
b->overlays_before = NULL;
b->overlays_after = NULL;
buffer_set_overlays (b, NULL, OV_BEFORE);
buffer_set_overlays (b, NULL, OV_AFTER);
b->overlay_center = BEG;
BVAR (b, mark_active) = Qnil;
BVAR (b, point_before_scroll) = Qnil;
@ -2602,7 +2605,7 @@ overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr,
ptrdiff_t prev = BEGV;
int inhibit_storing = 0;
for (tail = current_buffer->overlays_before; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next)
{
ptrdiff_t startpos, endpos;
@ -2650,7 +2653,7 @@ overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr,
next = startpos;
}
for (tail = current_buffer->overlays_after; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next)
{
ptrdiff_t startpos, endpos;
@ -2737,7 +2740,7 @@ overlays_in (EMACS_INT beg, EMACS_INT end, int extend,
int inhibit_storing = 0;
int end_is_Z = end == Z;
for (tail = current_buffer->overlays_before; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next)
{
ptrdiff_t startpos, endpos;
@ -2784,7 +2787,7 @@ overlays_in (EMACS_INT beg, EMACS_INT end, int extend,
next = startpos;
}
for (tail = current_buffer->overlays_after; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next)
{
ptrdiff_t startpos, endpos;
@ -2874,7 +2877,7 @@ overlay_touches_p (ptrdiff_t pos)
Lisp_Object overlay;
struct Lisp_Overlay *tail;
for (tail = current_buffer->overlays_before; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next)
{
ptrdiff_t endpos;
@ -2888,7 +2891,7 @@ overlay_touches_p (ptrdiff_t pos)
return 1;
}
for (tail = current_buffer->overlays_after; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next)
{
ptrdiff_t startpos;
@ -3089,7 +3092,7 @@ overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr)
overlay_heads.used = overlay_heads.bytes = 0;
overlay_tails.used = overlay_tails.bytes = 0;
for (ov = current_buffer->overlays_before; ov; ov = ov->next)
for (ov = buffer_get_overlays (NULL, OV_BEFORE); ov; ov = ov->next)
{
XSETMISC (overlay, ov);
eassert (OVERLAYP (overlay));
@ -3117,7 +3120,7 @@ overlay_strings (ptrdiff_t pos, struct window *w, unsigned char **pstr)
Foverlay_get (overlay, Qpriority),
endpos - startpos);
}
for (ov = current_buffer->overlays_after; ov; ov = ov->next)
for (ov = buffer_get_overlays (NULL, OV_AFTER); ov; ov = ov->next)
{
XSETMISC (overlay, ov);
eassert (OVERLAYP (overlay));
@ -3215,7 +3218,7 @@ recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos)
But we use it for symmetry and in case that should cease to be true
with some future change. */
prev = NULL;
for (tail = buf->overlays_before; tail; prev = tail, tail = next)
for (tail = buffer_get_overlays (buf, OV_BEFORE); tail; prev = tail, tail = next)
{
next = tail->next;
XSETMISC (overlay, tail);
@ -3234,11 +3237,11 @@ recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos)
if (prev)
prev->next = next;
else
buf->overlays_before = next;
buffer_set_overlays (buf, next, OV_BEFORE);
/* Search thru overlays_after for where to put it. */
other_prev = NULL;
for (other = buf->overlays_after; other;
for (other = buffer_get_overlays (buf, OV_AFTER); other;
other_prev = other, other = other->next)
{
Lisp_Object otherbeg, otheroverlay;
@ -3256,7 +3259,7 @@ recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos)
if (other_prev)
other_prev->next = tail;
else
buf->overlays_after = tail;
buffer_set_overlays (buf, tail, OV_AFTER);
tail = prev;
}
else
@ -3268,7 +3271,7 @@ recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos)
/* See if anything in overlays_after should be in overlays_before. */
prev = NULL;
for (tail = buf->overlays_after; tail; prev = tail, tail = next)
for (tail = buffer_get_overlays (buf, OV_AFTER); tail; prev = tail, tail = next)
{
next = tail->next;
XSETMISC (overlay, tail);
@ -3292,11 +3295,11 @@ recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos)
if (prev)
prev->next = next;
else
buf->overlays_after = next;
buffer_set_overlays (buf, next, OV_AFTER);
/* Search thru overlays_before for where to put it. */
other_prev = NULL;
for (other = buf->overlays_before; other;
for (other = buffer_get_overlays (buf, OV_BEFORE); other;
other_prev = other, other = other->next)
{
Lisp_Object otherend, otheroverlay;
@ -3314,7 +3317,7 @@ recenter_overlay_lists (struct buffer *buf, ptrdiff_t pos)
if (other_prev)
other_prev->next = tail;
else
buf->overlays_before = tail;
buffer_set_overlays (buf, tail, OV_BEFORE);
tail = prev;
}
}
@ -3367,7 +3370,7 @@ fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end)
assigned. */
struct Lisp_Overlay *beforep = NULL, *afterp = NULL;
/* 'Parent', likewise, indicates a cons cell or
current_buffer->overlays_before or overlays_after, depending
before or after overlays list, depending
which loop we're in. */
struct Lisp_Overlay *tail, *parent;
ptrdiff_t startpos, endpos;
@ -3379,7 +3382,7 @@ fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end)
(after_list) if it is, is still uninitialized. So it's not a bug
that before_list isn't initialized, although it may look
strange. */
for (parent = NULL, tail = current_buffer->overlays_before; tail;)
for (parent = NULL, tail = buffer_get_overlays (NULL, OV_BEFORE); tail;)
{
XSETMISC (overlay, tail);
@ -3419,7 +3422,7 @@ fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end)
beforep = tail;
}
if (!parent)
current_buffer->overlays_before = tail->next;
buffer_set_overlays (NULL, tail->next, OV_BEFORE);
else
parent->next = tail->next;
tail = tail->next;
@ -3427,7 +3430,7 @@ fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end)
else
parent = tail, tail = parent->next;
}
for (parent = NULL, tail = current_buffer->overlays_after; tail;)
for (parent = NULL, tail = buffer_get_overlays (NULL, OV_AFTER); tail;)
{
XSETMISC (overlay, tail);
@ -3465,7 +3468,7 @@ fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end)
beforep = tail;
}
if (!parent)
current_buffer->overlays_after = tail->next;
buffer_set_overlays (NULL, tail->next, OV_AFTER);
else
parent->next = tail->next;
tail = tail->next;
@ -3478,15 +3481,15 @@ fix_start_end_in_overlays (register ptrdiff_t start, register ptrdiff_t end)
and let the recenter function make it sane again. */
if (beforep)
{
beforep->next = current_buffer->overlays_before;
current_buffer->overlays_before = before_list;
beforep->next = buffer_get_overlays (NULL, OV_BEFORE);
buffer_set_overlays (NULL, before_list, OV_BEFORE);
}
recenter_overlay_lists (current_buffer, current_buffer->overlay_center);
if (afterp)
{
afterp->next = current_buffer->overlays_after;
current_buffer->overlays_after = after_list;
afterp->next = buffer_get_overlays (NULL, OV_AFTER);
buffer_set_overlays (NULL, after_list, OV_AFTER);
}
recenter_overlay_lists (current_buffer, current_buffer->overlay_center);
}
@ -3507,7 +3510,8 @@ void
fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos)
{
/* If parent is nil, replace overlays_before; otherwise, parent->next. */
struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair;
struct Lisp_Overlay *tail = buffer_get_overlays (bp, OV_BEFORE);
struct Lisp_Overlay *parent = NULL, *right_pair;
Lisp_Object tem;
ptrdiff_t end IF_LINT (= 0);
@ -3562,8 +3566,8 @@ fix_overlays_before (struct buffer *bp, ptrdiff_t prev, ptrdiff_t pos)
and link it into the right place. */
if (!right_pair)
{
found->next = bp->overlays_before;
bp->overlays_before = found;
found->next = buffer_get_overlays (bp, OV_BEFORE);
buffer_set_overlays (bp, found, OV_BEFORE);
}
else
{
@ -3639,15 +3643,15 @@ for the rear of the overlay advance when text is inserted there
end = OVERLAY_END (overlay);
if (OVERLAY_POSITION (end) < b->overlay_center)
{
if (b->overlays_after)
XOVERLAY (overlay)->next = b->overlays_after;
b->overlays_after = XOVERLAY (overlay);
if (buffer_get_overlays (b, OV_AFTER))
XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_AFTER);
buffer_set_overlays (b, XOVERLAY (overlay), OV_AFTER);
}
else
{
if (b->overlays_before)
XOVERLAY (overlay)->next = b->overlays_before;
b->overlays_before = XOVERLAY (overlay);
if (buffer_get_overlays (b, OV_BEFORE))
XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_BEFORE);
buffer_set_overlays (b, XOVERLAY (overlay), OV_BEFORE);
}
/* This puts it in the right list, and in the right order. */
@ -3705,6 +3709,19 @@ unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay)
return list;
}
/* Remove OVERLAY from both overlay lists of B. */
static void
unchain_both (struct buffer *b, Lisp_Object overlay)
{
struct Lisp_Overlay *ov = XOVERLAY (overlay);
buffer_set_overlays
(b, unchain_overlay (buffer_get_overlays (b, OV_BEFORE), ov), OV_BEFORE);
buffer_set_overlays
(b, unchain_overlay (buffer_get_overlays (b, OV_AFTER), ov), OV_AFTER);
}
DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0,
doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER.
If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.
@ -3755,10 +3772,7 @@ buffer. */)
o_beg = OVERLAY_POSITION (OVERLAY_START (overlay));
o_end = OVERLAY_POSITION (OVERLAY_END (overlay));
ob->overlays_before =
unchain_overlay (ob->overlays_before, XOVERLAY (overlay));
ob->overlays_after =
unchain_overlay (ob->overlays_after, XOVERLAY (overlay));
unchain_both (ob, overlay);
eassert (XOVERLAY (overlay)->next == NULL);
}
@ -3799,13 +3813,13 @@ buffer. */)
wrong list. */
if (n_end < b->overlay_center)
{
XOVERLAY (overlay)->next = b->overlays_after;
b->overlays_after = XOVERLAY (overlay);
XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_AFTER);
buffer_set_overlays (b, XOVERLAY (overlay), OV_AFTER);
}
else
{
XOVERLAY (overlay)->next = b->overlays_before;
b->overlays_before = XOVERLAY (overlay);
XOVERLAY (overlay)->next = buffer_get_overlays (b, OV_BEFORE);
buffer_set_overlays (b, XOVERLAY (overlay), OV_BEFORE);
}
/* This puts it in the right list, and in the right order. */
@ -3831,10 +3845,7 @@ DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0,
b = XBUFFER (buffer);
specbind (Qinhibit_quit, Qt);
b->overlays_before
= unchain_overlay (b->overlays_before, XOVERLAY (overlay));
b->overlays_after
= unchain_overlay (b->overlays_after, XOVERLAY (overlay));
unchain_both (b, overlay);
eassert (XOVERLAY (overlay)->next == NULL);
drop_overlay (b, XOVERLAY (overlay));
@ -4033,16 +4044,19 @@ However, the overlays you get are the real objects that the buffer uses. */)
{
struct Lisp_Overlay *ol;
Lisp_Object before = Qnil, after = Qnil, tmp;
for (ol = current_buffer->overlays_before; ol; ol = ol->next)
for (ol = buffer_get_overlays (NULL, OV_BEFORE); ol; ol = ol->next)
{
XSETMISC (tmp, ol);
before = Fcons (tmp, before);
}
for (ol = current_buffer->overlays_after; ol; ol = ol->next)
for (ol = buffer_get_overlays (NULL, OV_AFTER); ol; ol = ol->next)
{
XSETMISC (tmp, ol);
after = Fcons (tmp, after);
}
return Fcons (Fnreverse (before), Fnreverse (after));
}
@ -4182,7 +4196,7 @@ report_overlay_modification (Lisp_Object start, Lisp_Object end, int after,
/* We are being called before a change.
Scan the overlays to find the functions to call. */
last_overlay_modification_hooks_used = 0;
for (tail = current_buffer->overlays_before; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next)
{
ptrdiff_t startpos, endpos;
Lisp_Object ostart, oend;
@ -4219,7 +4233,7 @@ report_overlay_modification (Lisp_Object start, Lisp_Object end, int after,
}
}
for (tail = current_buffer->overlays_after; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next)
{
ptrdiff_t startpos, endpos;
Lisp_Object ostart, oend;
@ -4311,7 +4325,7 @@ evaporate_overlays (ptrdiff_t pos)
hit_list = Qnil;
if (pos <= current_buffer->overlay_center)
for (tail = current_buffer->overlays_before; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next)
{
ptrdiff_t endpos;
XSETMISC (overlay, tail);
@ -4323,7 +4337,7 @@ evaporate_overlays (ptrdiff_t pos)
hit_list = Fcons (overlay, hit_list);
}
else
for (tail = current_buffer->overlays_after; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next)
{
ptrdiff_t startpos;
XSETMISC (overlay, tail);

View file

@ -945,6 +945,52 @@ extern void mmap_set_vars (int);
} \
} while (0)
enum overlay_type
{
OV_BEFORE,
OV_AFTER
};
/* Get overlay list of type T and belonging to B. */
BUFFER_INLINE struct Lisp_Overlay *
buffer_get_overlays (struct buffer *b, enum overlay_type t)
{
if (!b)
b = current_buffer;
if (t == OV_BEFORE)
return b->overlays_before;
else if (t == OV_AFTER)
return b->overlays_after;
else
abort ();
}
/* Set overlay list of type T as belonging to B. */
BUFFER_INLINE void
buffer_set_overlays (struct buffer *b, struct Lisp_Overlay *o,
enum overlay_type t)
{
if (!b)
b = current_buffer;
if (t == OV_BEFORE)
b->overlays_before = o;
else if (t == OV_AFTER)
b->overlays_after = o;
else
abort ();
}
/* Non-zero if current buffer has overlays. */
BUFFER_INLINE int
buffer_has_overlays (void)
{
return buffer_get_overlays (current_buffer, OV_BEFORE)
|| buffer_get_overlays (current_buffer, OV_AFTER);
}
extern Lisp_Object Qbefore_change_functions;
extern Lisp_Object Qafter_change_functions;
extern Lisp_Object Qfirst_change_hook;

View file

@ -310,7 +310,7 @@ overlays_around (EMACS_INT pos, Lisp_Object *vec, ptrdiff_t len)
ptrdiff_t startpos, endpos;
ptrdiff_t idx = 0;
for (tail = current_buffer->overlays_before; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_BEFORE); tail; tail = tail->next)
{
XSETMISC (overlay, tail);
@ -329,7 +329,7 @@ overlays_around (EMACS_INT pos, Lisp_Object *vec, ptrdiff_t len)
}
}
for (tail = current_buffer->overlays_after; tail; tail = tail->next)
for (tail = buffer_get_overlays (NULL, OV_AFTER); tail; tail = tail->next)
{
XSETMISC (overlay, tail);

View file

@ -3490,8 +3490,8 @@ variable `last-coding-system-used' to the coding system actually used. */)
BVAR (buf, read_only) = Qnil;
BVAR (buf, filename) = Qnil;
BVAR (buf, undo_list) = Qt;
eassert (buf->overlays_before == NULL);
eassert (buf->overlays_after == NULL);
eassert (buffer_get_overlays (buf, OV_BEFORE) == NULL);
eassert (buffer_get_overlays (buf, OV_AFTER) == NULL);
set_buffer_internal (buf);
Ferase_buffer ();

View file

@ -337,8 +337,7 @@ current_column (void)
/* If the buffer has overlays, text properties,
or multibyte characters, use a more general algorithm. */
if (buffer_get_intervals (current_buffer)
|| current_buffer->overlays_before
|| current_buffer->overlays_after
|| buffer_has_overlays ()
|| Z != Z_BYTE)
return current_column_1 ();

View file

@ -1993,7 +1993,7 @@ signal_before_change (ptrdiff_t start_int, ptrdiff_t end_int,
XSETCDR (rvoe_arg, Qt);
}
if (current_buffer->overlays_before || current_buffer->overlays_after)
if (buffer_has_overlays ())
{
PRESERVE_VALUE;
report_overlay_modification (FETCH_START, FETCH_END, 0,
@ -2029,8 +2029,7 @@ signal_after_change (ptrdiff_t charpos, ptrdiff_t lendel, ptrdiff_t lenins)
just record the args that we were going to use. */
if (! NILP (Vcombine_after_change_calls)
&& NILP (Vbefore_change_functions)
&& !current_buffer->overlays_before
&& !current_buffer->overlays_after)
&& !buffer_has_overlays ())
{
Lisp_Object elt;
@ -2072,7 +2071,7 @@ signal_after_change (ptrdiff_t charpos, ptrdiff_t lendel, ptrdiff_t lenins)
XSETCDR (rvoe_arg, Qt);
}
if (current_buffer->overlays_before || current_buffer->overlays_after)
if (buffer_has_overlays ())
report_overlay_modification (make_number (charpos),
make_number (charpos + lenins),
1,

View file

@ -1870,8 +1870,7 @@ set_point_both (ptrdiff_t charpos, ptrdiff_t bytepos)
whether or not there are intervals in the buffer. */
eassert (charpos <= ZV && charpos >= BEGV);
have_overlays = (current_buffer->overlays_before
|| current_buffer->overlays_after);
have_overlays = buffer_has_overlays ();
/* If we have no text properties and overlays,
then we can do it quickly. */

View file

@ -498,8 +498,8 @@ temp_output_buffer_setup (const char *bufname)
BVAR (current_buffer, read_only) = Qnil;
BVAR (current_buffer, filename) = Qnil;
BVAR (current_buffer, undo_list) = Qt;
eassert (current_buffer->overlays_before == NULL);
eassert (current_buffer->overlays_after == NULL);
eassert (buffer_get_overlays (NULL, OV_BEFORE) == NULL);
eassert (buffer_get_overlays (NULL, OV_AFTER) == NULL);
BVAR (current_buffer, enable_multibyte_characters)
= BVAR (&buffer_defaults, enable_multibyte_characters);
specbind (Qinhibit_read_only, Qt);

View file

@ -5445,7 +5445,7 @@ load_overlay_strings (struct it *it, ptrdiff_t charpos)
while (0)
/* Process overlay before the overlay center. */
for (ov = current_buffer->overlays_before; ov; ov = ov->next)
for (ov = buffer_get_overlays (NULL, OV_BEFORE); ov; ov = ov->next)
{
XSETMISC (overlay, ov);
eassert (OVERLAYP (overlay));
@ -5485,7 +5485,7 @@ load_overlay_strings (struct it *it, ptrdiff_t charpos)
}
/* Process overlays after the overlay center. */
for (ov = current_buffer->overlays_after; ov; ov = ov->next)
for (ov = buffer_get_overlays (NULL, OV_AFTER); ov; ov = ov->next)
{
XSETMISC (overlay, ov);
eassert (OVERLAYP (overlay));