(hexl-current-address): New arg VALIDATE.

Handle point values in the ASCII text section and in the addresses.
(hexl-insert-char): Handle point located in the ASCII text.

diff --git a/lisp/hexl.el b/lisp/hexl.el
index 5fc08177e6bac24605c42dfab2e05487003551d6..ce13f52f37269727403e7dbfb61b64610401a678 100644 (file)
--- a/lisp/hexl.el
+++ b/lisp/hexl.el
@@ -269,13 +269,20 @@ Ask the user for confirmation."
        (set-buffer-modified-p modified)
        (goto-char original-point))))
 
-(defun hexl-current-address ()
+(defun hexl-current-address (&optional validate)
   "Return current hexl-address."
   (interactive)
   (let ((current-column (- (% (point) 68) 11)) 
        (hexl-address 0))
-    (setq hexl-address (+ (* (/ (point) 68) 16)
-                         (/ (- current-column  (/ current-column 5)) 2)))
+    (if (< current-column 0)
+       (if validate
+           (error "Point is not on a character in the file")
+         (setq current-column 0)))
+    (setq hexl-address
+         (+ (* (/ (point) 68) 16)
+            (if (>= current-column 41)
+                (- current-column 41)
+              (/ (- current-column  (/ current-column 5)) 2))))
     hexl-address))
 
 (defun hexl-address-to-marker (address)
@@ -577,17 +584,32 @@ You may also type up to 3 octal digits, to insert a character with that code"
 
 (defun hexl-insert-char (ch num)
   "Insert a character in a hexl buffer."
-  (let ((address (hexl-current-address)))
+  (let ((address (hexl-current-address t)))
     (while (> num 0)
-      (delete-char 2)
-      (insert (format "%02x" ch))
-      (goto-char
-       (+ (* (/ address 16) 68) 52 (% address 16)))
-      (delete-char 1)
-      (insert (hexl-printable-character ch))
-      (or (eq address hexl-max-address)
-         (setq address (1+ address)))
-      (hexl-goto-address address)
+      (let ((hex-position
+            (+ (* (/ address 16) 68)
+               11
+               (* 2 (% address 16))
+               (/ (% address 16) 2)))
+           (ascii-position
+            (+ (* (/ address 16) 68) 52 (% address 16)))
+           at-ascii-position)
+       (if (= (point) ascii-position)
+           (setq at-ascii-position t))
+       (goto-char hex-position)
+       (delete-char 2)
+       (insert (format "%02x" ch))
+       (goto-char ascii-position)
+       (delete-char 1)
+       (insert (hexl-printable-character ch))
+       (or (eq address hexl-max-address)
+           (setq address (1+ address)))
+       (hexl-goto-address address)
+       (if at-ascii-position
+           (progn
+             (beginning-of-line)
+             (forward-char 51)
+             (forward-char (% address 16)))))
       (setq num (1- num)))))
 
 ;; hex conversion