Merge from emacs-24; up to 2012-12-06T01:39:03Z!monnier@iro.umontreal.ca

[gnu-emacs] / src / print.c

diff --git a/src/print.c b/src/print.c
index bf86be5622e4c83550bce14f05d15cc5676b9f9a..e87bbcce0e7974144789f39b2a69fd893d26c260 100644 (file)
--- a/src/print.c
+++ b/src/print.c
@@ -1,7 +1,7 @@
 /* Lisp object printing and output streams.
 
-Copyright (C) 1985-1986, 1988, 1993-1995, 1997-2012
-  Free Software Foundation, Inc.
+Copyright (C) 1985-1986, 1988, 1993-1995, 1997-2013 Free Software
+Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -2034,14 +2034,44 @@ print_object (Lisp_Object obj, register Lisp_Object printcharfun, int escapeflag
          break;
 
        case Lisp_Misc_Save_Value:
-         strout ("#<save_value ", -1, -1, printcharfun);
          {
-           int len = sprintf (buf, "ptr=%p int=%"pD"d",
-                              XSAVE_VALUE (obj)->pointer,
-                              XSAVE_VALUE (obj)->integer);
-           strout (buf, len, len, printcharfun);
+           int i;
+           struct Lisp_Save_Value *v = XSAVE_VALUE (obj);
+
+           strout ("#<save-value ", -1, -1, printcharfun);
+           if (v->dogc)
+             {
+               int lim = min (v->integer, 8);
+               
+               /* Try to print up to 8 objects we have saved.  Although
+                  valid_lisp_object_p is slow, this shouldn't be a real
+                  bottleneck because such a saved values are quite rare.  */
+
+               i = sprintf (buf, "with %"pD"d objects", v->integer);
+               strout (buf, i, i, printcharfun);
+
+               for (i = 0; i < lim; i++)
+                 {
+                   Lisp_Object maybe = ((Lisp_Object *) v->pointer)[i];
+
+                   if (valid_lisp_object_p (maybe) > 0)
+                     {
+                       PRINTCHAR (' ');
+                       print_object (maybe, printcharfun, escapeflag);
+                     }
+                   else
+                     strout (" <invalid>", -1, -1, printcharfun);
+                 }
+               if (i == lim && i < v->integer)
+                 strout (" ...", 4, 4, printcharfun);
+             }
+           else
+             {
+               i = sprintf (buf, "ptr=%p int=%"pD"d", v->pointer, v->integer);
+               strout (buf, i, i, printcharfun);
+             }
+           PRINTCHAR ('>');
          }
-         PRINTCHAR ('>');
          break;
 
        default: