Improve backward compatibility of save-restriction

* src/editfns.c (save_restriction_save_1): Renamed from
'save_restrictions_save'.  Make it static.
(save_restriction_restore_1): Renamed from
'save_restriction_restore'.  Make it static.
(save_restriction_restore): New function, combining
'save_restriction_save_1' and 'narrowing_locks_save'.
(save_restriction_save): New function, combining
'save_restriction_restore_1' and 'narrowing_locks_restore'.
(Fsave_restriction): Restore the previous code.
(narrowing_locks_save, narrowing_locks_restore): Make them static.

* src/lisp.h: Remove two functions that are not externally visible
anymore.

* src/comp.c (helper_save_restriction): Restore the previous code.

* src/bytecode.c (exec_byte_code): Restore the previous code.

* lisp/emacs-lisp/bytecomp.el (byte-compile-save-restriction):
Decrement unbinding count.

diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index c6cda6b588af69ab37a28085533f6d3ce9011a8b..5df1205869cda185b0c13e361ed8d6e070b8e228 100644 (file)
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -4900,7 +4900,7 @@ binding slots have been popped."
 (defun byte-compile-save-restriction (form)
   (byte-compile-out 'byte-save-restriction 0)
   (byte-compile-body-do-effect (cdr form))
-  (byte-compile-out 'byte-unbind 2))
+  (byte-compile-out 'byte-unbind 1))
 
 (defun byte-compile-save-current-buffer (form)
   (byte-compile-out 'byte-save-current-buffer 0)

diff --git a/src/bytecode.c b/src/bytecode.c
index 8e214560f301d8785e1a35ec2cd93b5e9c2d9942..124348e5b358d2e6ca46136382921be39758d950 100644 (file)
--- a/src/bytecode.c
+++ b/src/bytecode.c
@@ -942,8 +942,6 @@ exec_byte_code (Lisp_Object fun, ptrdiff_t args_template,
        CASE (Bsave_restriction):
          record_unwind_protect (save_restriction_restore,
                                 save_restriction_save ());
-         record_unwind_protect (narrowing_locks_restore,
-                                narrowing_locks_save ());
          NEXT;
 
        CASE (Bcatch):          /* Obsolete since 25.  */

diff --git a/src/comp.c b/src/comp.c
index 0e2dfd3913bf43fd93894746c54f076575925111..10cf7962ba15bdd6a1dccf04fff490f9dacc7ab3 100644 (file)
--- a/src/comp.c
+++ b/src/comp.c
@@ -5063,8 +5063,6 @@ helper_save_restriction (void)
 {
   record_unwind_protect (save_restriction_restore,
                         save_restriction_save ());
-  record_unwind_protect (narrowing_locks_restore,
-                        narrowing_locks_save ());
 }
 
 static bool

diff --git a/src/editfns.c b/src/editfns.c
index ce133785e0b95a6e12b49098e3775f9fa23da5d7..f83c5c7259beccfa015524acd60ec5ba8f634461 100644 (file)
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -2794,7 +2794,7 @@ reset_outermost_narrowings (void)
 
 /* Helper functions to save and restore the narrowing locks of the
    current buffer in Fsave_restriction.  */
-Lisp_Object
+static Lisp_Object
 narrowing_locks_save (void)
 {
   Lisp_Object buf = Fcurrent_buffer ();
@@ -2804,7 +2804,7 @@ narrowing_locks_save (void)
   return Fcons (buf, Fcopy_sequence (locks));
 }
 
-void
+static void
 narrowing_locks_restore (Lisp_Object buf_and_saved_locks)
 {
   Lisp_Object buf = XCAR (buf_and_saved_locks);
@@ -2975,8 +2975,8 @@ This is an internal function used by `without-restriction'.  */)
   return Qnil;
 }
 
-Lisp_Object
-save_restriction_save (void)
+static Lisp_Object
+save_restriction_save_1 (void)
 {
   if (BEGV == BEG && ZV == Z)
     /* The common case that the buffer isn't narrowed.
@@ -2999,8 +2999,8 @@ save_restriction_save (void)
     }
 }
 
-void
-save_restriction_restore (Lisp_Object data)
+static void
+save_restriction_restore_1 (Lisp_Object data)
 {
   struct buffer *cur = NULL;
   struct buffer *buf = (CONSP (data)
@@ -3068,6 +3068,21 @@ save_restriction_restore (Lisp_Object data)
     set_buffer_internal (cur);
 }
 
+Lisp_Object
+save_restriction_save (void)
+{
+  Lisp_Object restr = save_restriction_save_1 ();
+  Lisp_Object locks = narrowing_locks_save ();
+  return Fcons (restr, locks);
+}
+
+void
+save_restriction_restore (Lisp_Object data)
+{
+  narrowing_locks_restore (XCDR (data));
+  save_restriction_restore_1 (XCAR (data));
+}
+
 DEFUN ("save-restriction", Fsave_restriction, Ssave_restriction, 0, UNEVALLED, 0,
        doc: /* Execute BODY, saving and restoring current buffer's restrictions.
 The buffer's restrictions make parts of the beginning and end invisible.
@@ -3092,7 +3107,6 @@ usage: (save-restriction &rest BODY)  */)
   specpdl_ref count = SPECPDL_INDEX ();
 
   record_unwind_protect (save_restriction_restore, save_restriction_save ());
-  record_unwind_protect (narrowing_locks_restore, narrowing_locks_save ());
   val = Fprogn (body);
   return unbind_to (count, val);
 }

diff --git a/src/lisp.h b/src/lisp.h
index 93197d3817677a6be8eeb9ef031747d73335ff2c..1276285e2f2a49ac756a415eb680ef168b900bae 100644 (file)
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -4684,8 +4684,6 @@ extern void save_excursion_save (union specbinding *);
 extern void save_excursion_restore (Lisp_Object, Lisp_Object);
 extern Lisp_Object save_restriction_save (void);
 extern void save_restriction_restore (Lisp_Object);
-extern Lisp_Object narrowing_locks_save (void);
-extern void narrowing_locks_restore (Lisp_Object);
 extern Lisp_Object make_buffer_string (ptrdiff_t, ptrdiff_t, bool);
 extern Lisp_Object make_buffer_string_both (ptrdiff_t, ptrdiff_t, ptrdiff_t,
                                            ptrdiff_t, bool);