(printify-buffer) Added, debugged from Roland McGrath's printify-buffer code

in LCD.

diff --git a/lisp/lpr.el b/lisp/lpr.el
index 2beead5..3bd1233 100644 (file)
--- a/lisp/lpr.el
+++ b/lisp/lpr.el
@@ -108,4 +108,20 @@ See definition of `print-region-1' for calling conventions.")
        (insert-buffer-substring oldbuf start end)
        (setq start (point-min) end (point-max)))))
 
+(defun printify-region (begin end)
+  "Turn nonprinting characters (other than TAB, LF, SPC, RET, and FF)
+in the current buffer into printable representations as control or
+hexadecimal escapes."
+  (interactive "r")
+  (save-excursion
+    (goto-char begin)
+    (let (c)
+      (while (re-search-forward "[\^@-\^h\^k\^n-\^_\177-\377]" end t)
+       (setq c (preceding-char))
+       (delete-backward-char 1)
+       (insert 
+        (if (< c ?\ )
+            (format "\\^%c" (+ c ?@))
+          (format "\\%02x" c)))))))
+
 ;;; lpr.el ends here