* pop.c (pop_stat, pop_last): Check validity of string-to-integer

[bpt/emacs.git] / lisp / register.el

diff --git a/lisp/register.el b/lisp/register.el
index 8f8b786..e25f532 100644 (file)
--- a/lisp/register.el
+++ b/lisp/register.el
@@ -1,7 +1,7 @@
 ;;; register.el --- register commands for Emacs
 
 ;; Copyright (C) 1985, 1993, 1994, 2001, 2002, 2003, 2004,
-;;   2005, 2006, 2007 Free Software Foundation, Inc.
+;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
 
 ;; Maintainer: FSF
 ;; Keywords: internal
@@ -10,7 +10,7 @@
 
 ;; GNU Emacs is free software; you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
+;; the Free Software Foundation; either version 3, or (at your option)
 ;; any later version.
 
 ;; GNU Emacs is distributed in the hope that it will be useful,
@@ -287,10 +287,12 @@ With prefix arg, delete as well.
 Called from program, takes four args: REGISTER, START, END and DELETE-FLAG.
 START and END are buffer positions indicating what to append."
   (interactive "cAppend to register: \nr\nP")
-  (or (stringp (get-register register))
-      (error "Register does not contain text"))
-  (set-register register (concat (get-register register)
-                           (filter-buffer-substring start end)))
+  (let ((reg (get-register register))
+        (text (filter-buffer-substring start end)))
+    (set-register
+     register (cond ((not reg) text)
+                    ((stringp reg) (concat reg text))
+                    (t (error "Register does not contain text")))))
   (if delete-flag (delete-region start end)))
 
 (defun prepend-to-register (register start end &optional delete-flag)
@@ -299,10 +301,12 @@ With prefix arg, delete as well.
 Called from program, takes four args: REGISTER, START, END and DELETE-FLAG.
 START and END are buffer positions indicating what to prepend."
   (interactive "cPrepend to register: \nr\nP")
-  (or (stringp (get-register register))
-      (error "Register does not contain text"))
-  (set-register register (concat (filter-buffer-substring start end)
-                           (get-register register)))
+  (let ((reg (get-register register))
+        (text (filter-buffer-substring start end)))
+    (set-register
+     register (cond ((not reg) text)
+                    ((stringp reg) (concat text reg))
+                    (t (error "Register does not contain text")))))
   (if delete-flag (delete-region start end)))
 
 (defun copy-rectangle-to-register (register start end &optional delete-flag)