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+;;; -*- Emacs-Lisp -*-
+
+;; Emacs Lisp function to narrow the current buffer so that the MIT Scheme
+;; copyright notice -- and nothing else -- disappears.  Works for Scheme,
+;; C, and Midas (assembler) files.  -- by Arthur Gleckler
+
+;; Copyright (c) 1988 Massachusetts Institute of Technology
+;; 
+;; This material was developed by the Scheme project at the Massachusetts
+;; Institute of Technology, Department of Electrical Engineering and
+;; Computer Science.  Permission to copy this software, to redistribute
+;; it, and to use it for any purpose is granted, subject to the following
+;; restrictions and understandings.
+;; 
+;; 1. Any copy made of this software must include this copyright notice
+;; in full.
+;; 
+;; 2. Users of this software agree to make their best efforts (a) to
+;; return to the MIT Scheme project any improvements or extensions that
+;; they make, so that these may be included in future releases; and (b)
+;; to inform MIT of noteworthy uses of this software.
+;; 
+;; 3. All materials developed as a consequence of the use of this
+;; software shall duly acknowledge such use, in accordance with the usual
+;; standards of acknowledging credit in academic research.
+;; 
+;; 4. MIT has made no warrantee or representation that the operation of
+;; this software will be error-free, and MIT is under no obligation to
+;; provide any services, by way of maintenance, update, or otherwise.
+;; 
+;; 5. In conjunction with products arising from the use of this material,
+;; there shall be no use of the name of the Massachusetts Institute of
+;; Technology nor of any adaptation thereof in any advertising,
+;; promotional, or sales literature without prior written consent from
+;; MIT in each case.
+
+;; Examples of use:
+;;
+;;   Install narrow-without-copyright on "C-x ," in Scheme and C modes.
+;;  
+;;     (define-key scheme-mode-map "\^x," 'narrow-without-copyright)
+;;     (define-key c-mode-map "\^x," 'narrow-without-copyright)
+;;  
+;;   Cause narrow-without-copyright to happen whenever a buffer is brought into
+;;   Scheme or C mode.  When an MIT Scheme file is loaded into a buffer, the
+;;   copyright will then automatically disappear.
+;;  
+;;     (setq scheme-mode-hook 'narrow-without-copyright)
+;;     (setq c-mode-hook 'narrow-without-copyright)
+
+(defun narrow-without-copyright ()
+  "Narrow the current buffer to the part after the MIT Scheme copyright notice,
+if there is one."
+  (interactive)
+  (let ((copyright-pattern
+        "Copyright ([cC]) [0-9---, ]* Massachusetts Institute of Technology"))
+    (save-excursion
+      (widen)
+      (goto-char 1)
+      (cond ((looking-at "#| -\\*-Scheme-\\*-")
+            (if (re-search-forward copyright-pattern (point-max) t)
+                (if (re-search-forward "|#[ \t\n]*" (point-max) t)
+                    (narrow-to-region (point) (point-max)))))
+           ((looking-at "/\\* -\\*-C-\\*-")
+            (if (re-search-forward copyright-pattern (point-max) t)
+                (if (re-search-forward "\\*/[ \t\n]*" (point-max) t)
+                    (narrow-to-region (point) (point-max)))))
+           ((looking-at ";* -\\*-Scheme-\\*-")
+            (if (re-search-forward copyright-pattern (point-max) t)
+                (let ((end-of-comment
+                       (re-search-forward
+                        "MIT in each case.\n;*[ \t\n]*" (point-max) t)))
+                  (if end-of-comment
+                      (narrow-to-region (point) (point-max))))))
+           ((looking-at "#* -\\*-Midas-\\*-")
+            (if (re-search-forward copyright-pattern (point-max) t)
+                (let ((end-of-comment
+                       (re-search-forward
+                        "MIT in each case.\n#*[ \t\n]*" (point-max) t))))))))))
+
+\f
+;;; Make Emacs automagically byte-compile this file when it is saved.
+;;;
+;;; Local Variables:
+;;; write-file-hooks: ((lambda () (if (fboundp 'auto-compile) (auto-compile))))
+;;; End: