From 9a08a6173c251e20bb8aeb7482ec7e429e863a4d Mon Sep 17 00:00:00 2001
From: Matthias Meulien <orontee@gmail.com>
Date: Tue, 18 Jun 2013 10:17:01 +0200
Subject: [PATCH] lisp/tabify.el (untabify, tabify): With prefix, apply to
 entire buffer.

---
 lisp/ChangeLog |  4 ++++
 lisp/tabify.el | 18 ++++++++++++++----
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index ab8868d600c..bcfb24f0d19 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,7 @@
+2013-06-18  Matthias Meulien  <orontee@gmail.com>
+
+	* tabify.el (untabify, tabify): With prefix, apply to entire buffer.
+
 2013-06-18  Glenn Morris  <rgm@gnu.org>
 
 	* generic-x.el (bat-generic-mode, rc-generic-mode, rul-generic-mode):
diff --git a/lisp/tabify.el b/lisp/tabify.el
index 6bf45b36886..a90bf801bcf 100644
--- a/lisp/tabify.el
+++ b/lisp/tabify.el
@@ -28,12 +28,17 @@
 ;;; Code:
 
 ;;;###autoload
-(defun untabify (start end)
+(defun untabify (start end &optional arg)
   "Convert all tabs in region to multiple spaces, preserving columns.
+If called interactively with prefix ARG, convert for the entire
+buffer.
+
 Called non-interactively, the region is specified by arguments
 START and END, rather than by the position of point and mark.
 The variable `tab-width' controls the spacing of tab stops."
-  (interactive "r")
+  (interactive (if current-prefix-arg
+		   (list (point-min) (point-max) current-prefix-arg)
+		 (list (region-beginning) (region-end) nil)))
   (let ((c (current-column)))
     (save-excursion
       (save-restriction
@@ -56,14 +61,19 @@ Usually this will be \" [ \\t]+\" to match a space followed by whitespace.
 \"^\\t* [ \\t]+\" is also useful, for tabifying only initial whitespace.")
 
 ;;;###autoload
-(defun tabify (start end)
+(defun tabify (start end &optional arg)
   "Convert multiple spaces in region to tabs when possible.
 A group of spaces is partially replaced by tabs
 when this can be done without changing the column they end at.
+If called interactively with prefix ARG, convert for the entire
+buffer.
+
 Called non-interactively, the region is specified by arguments
 START and END, rather than by the position of point and mark.
 The variable `tab-width' controls the spacing of tab stops."
-  (interactive "r")
+  (interactive (if current-prefix-arg
+		   (list (point-min) (point-max) current-prefix-arg)
+		 (list (region-beginning) (region-end) nil)))
   (save-excursion
     (save-restriction
       ;; Include the beginning of the line in the narrowing
-- 
2.11.4.GIT