Use const, move declarations to header files.

* src/buffer.c (Fset_buffer_multibyte): Remove local extern declaration.

* src/character.c (strwidth, parse_str_to_multibyte): Add const.

* src/character.h (strwidth, parse_str_to_multibyte): Likewise.

* src/charset.c (add_to_log): Remove declaration.

* src/composite.c (syms_of_composite): Remove local extern declarations.

* src/data.c (Finteractive_form): Use const.

* src/dired.c (scmp): Add const.
(directory_files_internal): Remove local extern declaration.

* src/dispextern.h (add_to_log): Remove declaration.
(x_get_arg, x_frame_get_arg, x_frame_get_and_record_arg)
(x_frame_get_and_record_arg, x_default_parameter): Add const.

* src/dispnew.c: Remove duplicate #include <unistd.h>.
(update_window, update_frame_1, init_display): Remove local extern
declarations.

* src/editfns.c (region_limit, syms_of_editfns): Remove local extern
declarations.

* src/emacs.c (main): Remove local extern declaration.

* src/font.c (Qnormal, QCtype, QCfamily, QCweight, QCslant, QCwidth)
(QCheight, QCsize, QCname): Remove declarations.

* src/frame.c (x_get_resource_string, x_get_string_resource)
(x_get_arg, x_frame_get_arg, x_frame_get_and_record_arg)
(x_default_parameter): Use const.

* src/image.c (QCwidth, QCheight, QCforeground, QCbackground, QCfile)
(QCdata, QCtype, Qcenter): Remove declarations.

* src/keyboard.h (do_mouse_tracking): Add declaration.

* src/minibuf.c (Qmouse_face): Remove declaration.

* src/msdos.c (IT_note_mouse_highlight): Remove local extern declaration.

* src/xdisp.c (do_mouse_tracking): Remove declaration.
(add_to_log): Use const.

* src/xfaces.c (Qmouse_face): Remove declaration.
(face_color_gray_p, tty_defined_color, defined_color)
(face_color_gray_p, face_color_supported_p). Add const.

* src/xfns.c: Include xlwmenu.h when USE_LUCID.
(x_defined_color, xic_set_xfontset): Use const.
(Fx_hide_tip): Remove local extern declaration.

* src/xselect.c (selection_data_to_lisp_data)
(x_property_data_to_lisp):
* src/xrdb.c (x_get_string_resource, file_p)
(x_get_customization_string, magic_file_p, search_magic_path)
(get_system_app, get_user_app, x_load_resources, x_get_resource)
(x_get_string_resource): Use const.

* src/xterm.c (xlwmenu_window_p, xlwmenu_redisplay): Remove declarations.
(x_text_icon, x_check_errors, x_connection_closed): Use const.

* src/xterm.h (x_get_customization_string, x_load_resources)
(x_get_resource, x_text_icon, x_text_icon, x_check_errors)
(x_check_errors, x_property_data_to_lisp, defined_color)
(xic_set_xfontset, x_defined_color): Use const.

1 files changed, 14 insertions, 6 deletions

diff --git a/src/frame.c b/src/frame.c
index 0cd7377ece1..ea300bdb16b 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -3721,7 +3721,7 @@ validate_x_resource_name (void)
 }
 
 
-extern char *x_get_string_resource (XrmDatabase, char *, char *);
+extern char *x_get_string_resource (XrmDatabase, const char *, const char *);
 extern Display_Info *check_x_display_info (Lisp_Object);
 
 
@@ -3823,7 +3823,7 @@ display_x_get_resource (Display_Info *dpyinfo, Lisp_Object attribute, Lisp_Objec
 /* Used when C code wants a resource value.  */
 /* Called from oldXMenu/Create.c.  */
 char *
-x_get_resource_string (char *attribute, char *class)
+x_get_resource_string (const char *attribute, const char *class)
 {
   char *name_key;
   char *class_key;
@@ -3856,7 +3856,8 @@ x_get_resource_string (char *attribute, char *class)
    and don't let it get stored in any Lisp-visible variables!  */
 
 Lisp_Object
-x_get_arg (Display_Info *dpyinfo, Lisp_Object alist, Lisp_Object param, char *attribute, char *class, enum resource_types type)
+x_get_arg (Display_Info *dpyinfo, Lisp_Object alist, Lisp_Object param,
+	   const char *attribute, const char *class, enum resource_types type)
 {
   register Lisp_Object tem;
 
@@ -3954,7 +3955,9 @@ x_get_arg (Display_Info *dpyinfo, Lisp_Object alist, Lisp_Object param, char *at
 }
 
 Lisp_Object
-x_frame_get_arg (struct frame *f, Lisp_Object alist, Lisp_Object param, char *attribute, char *class, enum resource_types type)
+x_frame_get_arg (struct frame *f, Lisp_Object alist, Lisp_Object param,
+		 const char *attribute, const char *class,
+		 enum resource_types type)
 {
   return x_get_arg (FRAME_X_DISPLAY_INFO (f),
 		    alist, param, attribute, class, type);
@@ -3963,7 +3966,10 @@ x_frame_get_arg (struct frame *f, Lisp_Object alist, Lisp_Object param, char *at
 /* Like x_frame_get_arg, but also record the value in f->param_alist.  */
 
 Lisp_Object
-x_frame_get_and_record_arg (struct frame *f, Lisp_Object alist, Lisp_Object param, char *attribute, char *class, enum resource_types type)
+x_frame_get_and_record_arg (struct frame *f, Lisp_Object alist,
+			    Lisp_Object param,
+			    const char *attribute, const char *class,
+			    enum resource_types type)
 {
   Lisp_Object value;
 
@@ -3983,7 +3989,9 @@ x_frame_get_and_record_arg (struct frame *f, Lisp_Object alist, Lisp_Object para
    If that is not found either, use the value DEFLT.  */
 
 Lisp_Object
-x_default_parameter (struct frame *f, Lisp_Object alist, Lisp_Object prop, Lisp_Object deflt, char *xprop, char *xclass, enum resource_types type)
+x_default_parameter (struct frame *f, Lisp_Object alist, Lisp_Object prop,
+		     Lisp_Object deflt, const char *xprop, const char *xclass,
+		     enum resource_types type)
 {
   Lisp_Object tem;