Don't overuse 'const' in types of locals.

* bidi.c (bidi_count_bytes):
* gtkutil.c, gtkutil.h (xg_event_is_for_menubar)
(xg_event_is_for_scrollbar):
* xselect.c (x_handle_property_notify)
(x_handle_selection_notify, x_handle_dnd_message):
* xsettings.c, xsettings.h (xft_settings_event):
* xterm.c (x_handle_net_wm_state, handle_one_event)
(x_menubar_window_to_frame, x_detect_focus_change)
(construct_mouse_click, note_mouse_movement)
(x_scroll_bar_to_input_event, x_scroll_bar_expose)
(x_scroll_bar_handle_click, x_scroll_bar_note_movement)
(handle_one_xevent, x_handle_net_wm_state):
* xterm.h (x_handle_property_notify, x_handle_selection_notify)
(x_handle_dnd_message):
Avoid unnecessary 'const', typically the second 'const' in
'const foo * const arg', a 'const' that does not affect the API
and doesn't significantly help the human reader.

9 files changed, 49 insertions, 28 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index f1ba30f023b..d477e3d2ae3 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,24 @@
+2013-09-17  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Don't overuse 'const' in types of locals.
+        * bidi.c (bidi_count_bytes):
+        * gtkutil.c, gtkutil.h (xg_event_is_for_menubar)
+        (xg_event_is_for_scrollbar):
+        * xselect.c (x_handle_property_notify)
+        (x_handle_selection_notify, x_handle_dnd_message):
+        * xsettings.c, xsettings.h (xft_settings_event):
+        * xterm.c (x_handle_net_wm_state, handle_one_event)
+        (x_menubar_window_to_frame, x_detect_focus_change)
+        (construct_mouse_click, note_mouse_movement)
+        (x_scroll_bar_to_input_event, x_scroll_bar_expose)
+        (x_scroll_bar_handle_click, x_scroll_bar_note_movement)
+        (handle_one_xevent, x_handle_net_wm_state):
+        * xterm.h (x_handle_property_notify, x_handle_selection_notify)
+        (x_handle_dnd_message):
+        Avoid unnecessary 'const', typically the second 'const' in
+        'const foo * const arg', a 'const' that does not affect the API
+        and doesn't significantly help the human reader.
+
 2013-09-17  Dmitry Antipov  <dmantipov@yandex.ru>
 
         * image.c (fn_g_type_init) [WINDOWSNT]: Define and load
diff --git a/src/bidi.c b/src/bidi.c
index 7d082a94997..dc905cd9e5f 100644
--- a/src/bidi.c
+++ b/src/bidi.c
@@ -870,8 +870,8 @@ bidi_line_init (struct bidi_it *bidi_it)
    are zero-based character positions in S, BEGBYTE is byte position
    corresponding to BEG.  UNIBYTE means S is a unibyte string.  */
 static ptrdiff_t
-bidi_count_bytes (const unsigned char *s, const ptrdiff_t beg,
-                  const ptrdiff_t begbyte, const ptrdiff_t end, bool unibyte)
+bidi_count_bytes (const unsigned char *s, ptrdiff_t beg,
+                  ptrdiff_t begbyte, ptrdiff_t end, bool unibyte)
 {
   ptrdiff_t pos = beg;
   const unsigned char *p = s + begbyte, *start = p;
diff --git a/src/gtkutil.c b/src/gtkutil.c
index 57b7b58d9d6..e20d01521f0 100644
--- a/src/gtkutil.c
+++ b/src/gtkutil.c
@@ -3409,7 +3409,7 @@ free_frame_menubar (struct frame *f)
 }
 
 bool
-xg_event_is_for_menubar (struct frame *f, const XEvent * const event)
+xg_event_is_for_menubar (struct frame *f, const XEvent *event)
 {
   struct x_output *x = f->output_data.x;
   GList *iter;
@@ -3861,7 +3861,7 @@ xg_set_toolkit_scroll_bar_thumb (struct scroll_bar *bar,
    frame.  This function does additional checks.  */
 
 bool
-xg_event_is_for_scrollbar (struct frame *f, const XEvent * const event)
+xg_event_is_for_scrollbar (struct frame *f, const XEvent *event)
 {
   bool retval = 0;
 
diff --git a/src/gtkutil.h b/src/gtkutil.h
index 57971cf4a38..1c26d2aa44b 100644
--- a/src/gtkutil.h
+++ b/src/gtkutil.h
@@ -105,7 +105,7 @@ extern void xg_modify_menubar_widgets (GtkWidget *menubar,
 
 extern void xg_update_frame_menubar (struct frame *f);
 
-extern bool xg_event_is_for_menubar (struct frame *, const XEvent * const);
+extern bool xg_event_is_for_menubar (struct frame *, const XEvent *);
 
 extern bool xg_have_tear_offs (void);
 
@@ -129,7 +129,7 @@ extern void xg_set_toolkit_scroll_bar_thumb (struct scroll_bar *bar,
                                              int portion,
                                              int position,
                                              int whole);
-extern bool xg_event_is_for_scrollbar (struct frame *, const XEvent * const);
+extern bool xg_event_is_for_scrollbar (struct frame *, const XEvent *);
 extern int xg_get_default_scrollbar_width (void);
 
 extern void update_frame_tool_bar (struct frame *f);
diff --git a/src/xselect.c b/src/xselect.c
index cec91e41e75..5eb263d8d0c 100644
--- a/src/xselect.c
+++ b/src/xselect.c
@@ -1141,7 +1141,7 @@ wait_for_property_change (struct prop_location *location)
 /* Called from XTread_socket in response to a PropertyNotify event.  */
 
 void
-x_handle_property_notify (const XPropertyEvent * const event)
+x_handle_property_notify (const XPropertyEvent *event)
 {
   struct prop_location *rest;
 
@@ -1888,7 +1888,7 @@ clean_local_selection_data (Lisp_Object obj)
    We store t there if the reply is successful, lambda if not.  */
 
 void
-x_handle_selection_notify (const XSelectionEvent * const event)
+x_handle_selection_notify (const XSelectionEvent *event)
 {
   if (event->requestor != reading_selection_window)
     return;
@@ -2488,7 +2488,7 @@ FRAME is on.  If FRAME is nil, the selected frame is used.  */)
 /* Convert an XClientMessageEvent to a Lisp event of type DRAG_N_DROP_EVENT.  */
 
 int
-x_handle_dnd_message (struct frame *f, const XClientMessageEvent * const event,
+x_handle_dnd_message (struct frame *f, const XClientMessageEvent *event,
                       struct x_display_info *dpyinfo, struct input_event *bufp)
 {
   Lisp_Object vec;
diff --git a/src/xsettings.c b/src/xsettings.c
index 770cd8e4a56..bdf9f2876be 100644
--- a/src/xsettings.c
+++ b/src/xsettings.c
@@ -754,7 +754,7 @@ read_and_apply_settings (struct x_display_info *dpyinfo, int send_event_p)
 /* Check if EVENT for the display in DPYINFO is XSettings related.  */
 
 void
-xft_settings_event (struct x_display_info *dpyinfo, const XEvent * const event)
+xft_settings_event (struct x_display_info *dpyinfo, const XEvent *event)
 {
   bool check_window_p = 0, apply_settings_p = 0;
 
diff --git a/src/xsettings.h b/src/xsettings.h
index 4407ca7df92..a017c5d92d8 100644
--- a/src/xsettings.h
+++ b/src/xsettings.h
@@ -21,7 +21,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define XSETTINGS_H
 
 extern void xsettings_initialize (struct x_display_info *);
-extern void xft_settings_event (struct x_display_info *, const XEvent * const);
+extern void xft_settings_event (struct x_display_info *, const XEvent *);
 extern const char *xsettings_get_system_font (void);
 #ifdef USE_LUCID
 extern const char *xsettings_get_system_normal_font (void);
diff --git a/src/xterm.c b/src/xterm.c
index 90e58c81f44..ba588157fc0 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -303,12 +303,12 @@ static void x_scroll_bar_report_motion (struct frame **, Lisp_Object *,
                                         enum scroll_bar_part *,
                                         Lisp_Object *, Lisp_Object *,
                                         Time *);
-static int x_handle_net_wm_state (struct frame *, const XPropertyEvent * const);
+static int x_handle_net_wm_state (struct frame *, const XPropertyEvent *);
 static void x_check_fullscreen (struct frame *);
 static void x_check_expected_move (struct frame *, int, int);
 static void x_sync_with_move (struct frame *, int, int, int);
 static int handle_one_xevent (struct x_display_info *,
-                              const XEvent * const, int *,
+                              const XEvent *, int *,
                               struct input_event *);
 #ifdef USE_GTK
 static int x_dispatch_event (XEvent *, Display *);
@@ -3462,7 +3462,7 @@ x_any_window_to_frame (struct x_display_info *dpyinfo, int wdesc)
 
 static struct frame *
 x_menubar_window_to_frame (struct x_display_info *dpyinfo,
-                           const XEvent * const event)
+                           const XEvent *event)
 {
   Window wdesc = event->xany.window;
   Lisp_Object tail, frame;
@@ -3544,7 +3544,7 @@ x_top_window_to_frame (struct x_display_info *dpyinfo, int wdesc)
 
 static void
 x_detect_focus_change (struct x_display_info *dpyinfo, struct frame *frame,
-                       const XEvent * const event, struct input_event *bufp)
+                       const XEvent *event, struct input_event *bufp)
 {
   if (!frame)
     return;
@@ -3835,7 +3835,7 @@ x_get_keysym_name (int keysym)
 
 static Lisp_Object
 construct_mouse_click (struct input_event *result,
-                       const XButtonEvent * const event,
+                       const XButtonEvent *event,
                        struct frame *f)
 {
   /* Make the event type NO_EVENT; we'll change that when we decide
@@ -3868,7 +3868,7 @@ static XMotionEvent last_mouse_motion_event;
 static Lisp_Object last_mouse_motion_frame;
 
 static int
-note_mouse_movement (struct frame *frame, const XMotionEvent * const event)
+note_mouse_movement (struct frame *frame, const XMotionEvent *event)
 {
   last_mouse_movement_time = event->time;
   last_mouse_motion_event = *event;
@@ -4359,7 +4359,7 @@ x_send_scroll_bar_event (Lisp_Object window, int part, int portion, int whole)
    in *IEVENT.  */
 
 static void
-x_scroll_bar_to_input_event (const XEvent * const event,
+x_scroll_bar_to_input_event (const XEvent *event,
                              struct input_event *ievent)
 {
   XClientMessageEvent *ev = (XClientMessageEvent *) event;
@@ -5504,7 +5504,7 @@ XTjudge_scroll_bars (struct frame *f)
    mark bits.  */
 
 static void
-x_scroll_bar_expose (struct scroll_bar *bar, const XEvent * const event)
+x_scroll_bar_expose (struct scroll_bar *bar, const XEvent *event)
 {
   Window w = bar->x_window;
   struct frame *f = XFRAME (WINDOW_FRAME (XWINDOW (bar->window)));
@@ -5543,7 +5543,7 @@ x_scroll_bar_expose (struct scroll_bar *bar, const XEvent * const event)
 
 static void
 x_scroll_bar_handle_click (struct scroll_bar *bar,
-                           const XEvent * const event,
+                           const XEvent *event,
                            struct input_event *emacs_event)
 {
   if (! WINDOWP (bar->window))
@@ -5602,7 +5602,7 @@ x_scroll_bar_handle_click (struct scroll_bar *bar,
 
 static void
 x_scroll_bar_note_movement (struct scroll_bar *bar,
-                            const XMotionEvent * const event)
+                            const XMotionEvent *event)
 {
   struct frame *f = XFRAME (XWINDOW (bar->window)->frame);
 
@@ -5853,7 +5853,7 @@ static void xembed_send_message (struct frame *f, Time,
 
 static int
 handle_one_xevent (struct x_display_info *dpyinfo,
-                   const XEvent * const event,
+                   const XEvent *event,
                    int *finish, struct input_event *hold_quit)
 {
   union {
@@ -6078,7 +6078,7 @@ handle_one_xevent (struct x_display_info *dpyinfo,
         goto OTHER;
 #endif /* USE_X_TOOLKIT */
       {
-        const XSelectionClearEvent * const eventp = &event->xselectionclear;
+        const XSelectionClearEvent *eventp = &event->xselectionclear;
 
         inev.ie.kind = SELECTION_CLEAR_EVENT;
         SELECTION_EVENT_DISPLAY (&inev.sie) = eventp->display;
@@ -6094,7 +6094,7 @@ handle_one_xevent (struct x_display_info *dpyinfo,
         goto OTHER;
 #endif /* USE_X_TOOLKIT */
       {
-        const XSelectionRequestEvent * const eventp = &event->xselectionrequest;
+        const XSelectionRequestEvent *eventp = &event->xselectionrequest;
 
         inev.ie.kind = SELECTION_REQUEST_EVENT;
         SELECTION_EVENT_DISPLAY (&inev.sie) = eventp->display;
@@ -8533,7 +8533,7 @@ XTfullscreen_hook (struct frame *f)
 
 
 static int
-x_handle_net_wm_state (struct frame *f, const XPropertyEvent * const event)
+x_handle_net_wm_state (struct frame *f, const XPropertyEvent *event)
 {
   int value = FULLSCREEN_NONE;
   Lisp_Object lval;
diff --git a/src/xterm.h b/src/xterm.h
index 8dc86784b09..28b72969972 100644
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -941,8 +941,8 @@ extern void x_wait_for_event (struct frame *, int);
 
 /* Defined in xselect.c */
 
-extern void x_handle_property_notify (const XPropertyEvent * const);
-extern void x_handle_selection_notify (const XSelectionEvent * const);
+extern void x_handle_property_notify (const XPropertyEvent *);
+extern void x_handle_selection_notify (const XSelectionEvent *);
 extern void x_handle_selection_event (struct input_event *);
 extern void x_clear_frame_selections (struct frame *);
 
@@ -954,7 +954,7 @@ extern void x_send_client_event (Lisp_Object display,
                                  Lisp_Object values);
 
 extern int x_handle_dnd_message (struct frame *,
-                                 const XClientMessageEvent * const,
+                                 const XClientMessageEvent *,
                                  struct x_display_info *,
                                  struct input_event *);
 extern int x_check_property_data (Lisp_Object);