Make Emacs functions such as Fatom 'static' by default.

This makes it easier for human readers (and static analyzers)
to see whether these functions can be called from other modules.
DEFUN now defines a static function.  To make the function external
so that it can be used in other C modules, use the new macro DEFUE.
* lisp.h (DEFINE_FUNC): New macro, with the old contents of DEFUN.
(DEFUN): Rewrite in terms of DEFINE_FUNC.  It now generates a
static function definition.  Use DEFUE if you want an extern one.
(DEFUE, INFUN): New macros.
(Funibyte_char_to_multibyte, Fsyntax_table_p, Finit_image_library):
(Feval_region, Fbacktrace, Ffetch_bytecode, Fswitch_to_buffer):
(Ffile_executable_p, Fmake_symbolic_link, Fcommand_execute):
(Fget_process, Fdocumentation_property, Fbyte_code, Ffile_attributes):
Remove decls, since these functions are now static.
(Funintern, Fget_internal_run_time): New decls, since these functions
were already external.
* alloc.c, buffer.c, callint.c, callproc.c, casefiddle.c, casetab.c:
* ccl.c, character.c, chartab.c, cmds.c, coding.c, data.c, dispnew.c:
* doc.c, editfns.c, emacs.c, eval.c, fileio.c, filelock.c, floatfns.c:
* fns.c, font.c, fontset.c, frame.c, image.c, indent.c:
* keyboard.c, keymap.c, lread.c:
* macros.c, marker.c, menu.c, minibuf.c, print.c, process.c, search.c:
* syntax.c, term.c, terminal.c, textprop.c, undo.c:
* window.c, xdisp.c, xfaces.c, xfns.c, xmenu.c, xsettings.c:
Mark functions with DEFUE instead of DEFUN,
if they are used in other modules.
* buffer.c (Fset_buffer_major_mode, Fdelete_overlay): New forward
decls for now-static functions.
* buffer.h (Fdelete_overlay): Remove decl.
* callproc.c (Fgetenv_internal): Mark as internal.
* composite.c (Fremove_list_of_text_properties): Remove decl.
(Fcomposition_get_gstring): New forward static decl.
* composite.h (Fcomposite_get_gstring): Remove decl.
* dired.c (Ffile_attributes): New forward static decl.
* doc.c (Fdocumntation_property): New forward static decl.
* eval.c (Ffetch_bytecode): New forward static decl.
(Funintern): Remove extern decl; now in .h file where it belongs.
* fileio.c (Fmake_symbolic_link): New forward static decl.
* image.c (Finit_image_library): New forward static decl.
* insdel.c (Fcombine_after_change_execute): Make forward decl static.
* intervals.h (Fprevious_property_change):
(Fremove_list_of_text_properties): Remove decls.
* keyboard.c (Fthis_command_keys): Remove decl.
(Fcommand_execute): New forward static decl.
* keymap.c (Flookup_key): New forward static decl.
(Fcopy_keymap): Now static.
* keymap.h (Flookup_key): Remove decl.
* process.c (Fget_process): New forward static decl.
(Fprocess_datagram_address): Mark as internal.
* syntax.c (Fsyntax_table_p): New forward static decl.
(skip_chars): Remove duplicate decl.
* textprop.c (Fprevious_property_change): New forward static decl.
* window.c (Fset_window_fringes, Fset_window_scroll_bars):
Now internal.
(Fset_window_margins, Fset_window_vscroll): New forward static decls.
* window.h (Fset_window_vscroll, Fset_window_margins): Remove decls.

1 files changed, 10 insertions, 16 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 4859862c88f..6a28a0f81b3 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1804,8 +1804,12 @@ typedef struct {
  `doc' is documentation for the user.  */
 
 /* This version of DEFUN declares a function prototype with the right
-   arguments, so we can catch errors with maxargs at compile-time.  */
-#define DEFUN(lname, fnname, sname, minargs, maxargs, intspec, doc)	\
+   arguments, so we can catch errors with maxargs at compile-time.
+   DEFUN defines an internal function, and DEFUE is similar but defines a
+   external function, which can be used in other C-language modules.  */
+#define DEFUN static DEFINE_FUNC
+#define DEFUE extern DEFINE_FUNC
+#define DEFINE_FUNC(lname, fnname, sname, minargs, maxargs, intspec, doc) \
   Lisp_Object fnname DEFUN_ARGS_ ## maxargs ;				\
   DECL_ALIGN (struct Lisp_Subr, sname) =				\
     { PVEC_SUBR | (sizeof (struct Lisp_Subr) / sizeof (EMACS_INT)),	\
@@ -2279,6 +2283,8 @@ void staticpro (Lisp_Object *);
    appropriate prototype.  */
 #define EXFUN(fnname, maxargs) \
   extern Lisp_Object fnname DEFUN_ARGS_ ## maxargs
+#define INFUN(fnname, maxargs) \
+  static Lisp_Object fnname DEFUN_ARGS_ ## maxargs
 
 /* Forward declarations for prototypes.  */
 struct window;
@@ -2404,7 +2410,6 @@ extern void init_coding_once (void);
 extern void syms_of_coding (void);
 
 /* Defined in character.c */
-EXFUN (Funibyte_char_to_multibyte, 1);
 EXFUN (Fchar_width, 1);
 EXFUN (Fstring, MANY);
 extern EMACS_INT chars_in_text (const unsigned char *, EMACS_INT);
@@ -2428,7 +2433,6 @@ extern void syms_of_composite (void);
 EXFUN (Fforward_word, 1);
 EXFUN (Fskip_chars_forward, 2);
 EXFUN (Fskip_chars_backward, 2);
-EXFUN (Fsyntax_table_p, 1);
 extern void init_syntax_once (void);
 extern void syms_of_syntax (void);
 
@@ -2529,7 +2533,6 @@ extern void init_fringe_once (void);
 extern Lisp_Object QCascent, QCmargin, QCrelief, Qcount, Qextension_data;
 extern Lisp_Object QCconversion, QCcolor_symbols, QCheuristic_mask;
 extern Lisp_Object QCindex, QCmatrix, QCcolor_adjustment, QCmask;
-EXFUN (Finit_image_library, 2);
 extern int x_bitmap_mask (struct frame *, int);
 extern void syms_of_image (void);
 extern void init_image (void);
@@ -2790,11 +2793,11 @@ EXFUN (Fread, 1);
 EXFUN (Fread_from_string, 3);
 EXFUN (Fintern, 2);
 EXFUN (Fintern_soft, 2);
+EXFUN (Funintern, 2);
 EXFUN (Fload, 5);
 EXFUN (Fget_load_suffixes, 0);
 EXFUN (Fread_char, 3);
 EXFUN (Fread_event, 3);
-EXFUN (Feval_region, 4);
 extern Lisp_Object check_obarray (Lisp_Object);
 extern Lisp_Object intern (const char *);
 extern Lisp_Object intern_c_string (const char *);
@@ -2852,7 +2855,6 @@ EXFUN (Feval, 2);
 extern Lisp_Object eval_sub (Lisp_Object form);
 EXFUN (Fapply, MANY);
 EXFUN (Ffuncall, MANY);
-EXFUN (Fbacktrace, 0);
 extern Lisp_Object apply1 (Lisp_Object, Lisp_Object);
 extern Lisp_Object call0 (Lisp_Object);
 extern Lisp_Object call1 (Lisp_Object, Lisp_Object);
@@ -2877,7 +2879,6 @@ extern void verror (const char *, va_list)
   NO_RETURN ATTRIBUTE_FORMAT_PRINTF (1, 0);
 extern void do_autoload (Lisp_Object, Lisp_Object);
 extern Lisp_Object un_autoload (Lisp_Object);
-EXFUN (Ffetch_bytecode, 1);
 extern void init_eval_once (void);
 extern Lisp_Object safe_call (size_t, Lisp_Object *);
 extern Lisp_Object safe_call1 (Lisp_Object, Lisp_Object);
@@ -2921,6 +2922,7 @@ EXFUN (Fwiden, 0);
 EXFUN (Fuser_login_name, 1);
 EXFUN (Fsystem_name, 0);
 EXFUN (Fcurrent_time, 0);
+EXFUN (Fget_internal_run_time, 0);
 extern EMACS_INT clip_to_bounds (EMACS_INT, EMACS_INT, EMACS_INT);
 extern Lisp_Object make_buffer_string (EMACS_INT, EMACS_INT, int);
 extern Lisp_Object make_buffer_string_both (EMACS_INT, EMACS_INT, EMACS_INT,
@@ -2953,7 +2955,6 @@ EXFUN (Fset_buffer, 1);
 extern Lisp_Object set_buffer_if_live (Lisp_Object);
 EXFUN (Fbarf_if_buffer_read_only, 0);
 EXFUN (Fcurrent_buffer, 0);
-EXFUN (Fswitch_to_buffer, 2);
 EXFUN (Fother_buffer, 3);
 EXFUN (Foverlay_get, 2);
 EXFUN (Fbuffer_modified_p, 1);
@@ -3018,7 +3019,6 @@ EXFUN (Funhandled_file_name_directory, 1);
 EXFUN (Ffile_directory_p, 1);
 EXFUN (Fwrite_region, 7);
 EXFUN (Ffile_readable_p, 1);
-EXFUN (Ffile_executable_p, 1);
 EXFUN (Fread_file_name, 6);
 extern Lisp_Object close_file_unwind (Lisp_Object);
 extern Lisp_Object restore_point_unwind (Lisp_Object);
@@ -3026,7 +3026,6 @@ extern void report_file_error (const char *, Lisp_Object) NO_RETURN;
 extern int internal_delete_file (Lisp_Object);
 extern void syms_of_fileio (void);
 extern Lisp_Object make_temp_name (Lisp_Object, int);
-EXFUN (Fmake_symbolic_link, 3);
 extern Lisp_Object Qdelete_file;
 
 /* Defined in abbrev.c */
@@ -3119,7 +3118,6 @@ extern int input_pending;
 EXFUN (Fdiscard_input, 0);
 EXFUN (Frecursive_edit, 0);
 EXFUN (Ftop_level, 0) NO_RETURN;
-EXFUN (Fcommand_execute, 4);
 extern Lisp_Object menu_bar_items (Lisp_Object);
 extern Lisp_Object tool_bar_items (Lisp_Object, int *);
 extern Lisp_Object Qvertical_scroll_bar;
@@ -3221,7 +3219,6 @@ extern int running_asynch_code;
 
 /* Defined in process.c */
 extern Lisp_Object QCtype, Qlocal;
-EXFUN (Fget_process, 1);
 EXFUN (Fget_buffer_process, 1);
 EXFUN (Fprocess_status, 1);
 EXFUN (Fkill_process, 2);
@@ -3255,7 +3252,6 @@ extern void syms_of_callproc (void);
 /* Defined in doc.c */
 extern Lisp_Object Qfunction_documentation;
 EXFUN (Fsubstitute_command_keys, 1);
-EXFUN (Fdocumentation_property, 3);
 extern Lisp_Object read_doc_string (Lisp_Object);
 extern Lisp_Object get_doc_string (Lisp_Object, int, int);
 extern void syms_of_doc (void);
@@ -3263,7 +3259,6 @@ extern int read_bytecode_char (int);
 
 /* Defined in bytecode.c */
 extern Lisp_Object Qbytecode;
-EXFUN (Fbyte_code, 3);
 extern void syms_of_bytecode (void);
 extern struct byte_stack *byte_stack_list;
 #ifdef BYTE_MARK_STACK
@@ -3384,7 +3379,6 @@ extern void syms_of_category (void);
 extern void syms_of_ccl (void);
 
 /* Defined in dired.c */
-EXFUN (Ffile_attributes, 2);
 extern void syms_of_dired (void);
 extern Lisp_Object directory_files_internal (Lisp_Object, Lisp_Object,
                                              Lisp_Object, Lisp_Object,