Initial revision

1 files changed, 625 insertions, 0 deletions

diff --git a/lisp/emacs-lisp/lisp-mode.el b/lisp/emacs-lisp/lisp-mode.el
new file mode 100644
index 00000000000..d7b26e1461e
--- /dev/null
+++ b/lisp/emacs-lisp/lisp-mode.el
@@ -0,0 +1,625 @@
+;; Lisp mode, and its idiosyncratic commands.
+;; Copyright (C) 1985 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; 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 1, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+(defvar lisp-mode-syntax-table nil "")
+(defvar emacs-lisp-mode-syntax-table nil "")
+(defvar lisp-mode-abbrev-table nil "")
+
+(if (not emacs-lisp-mode-syntax-table)
+    (let ((i 0))
+      (setq emacs-lisp-mode-syntax-table (make-syntax-table))
+      (while (< i ?0)
+        (modify-syntax-entry i "_   " emacs-lisp-mode-syntax-table)
+        (setq i (1+ i)))
+      (setq i (1+ ?9))
+      (while (< i ?A)
+        (modify-syntax-entry i "_   " emacs-lisp-mode-syntax-table)
+        (setq i (1+ i)))
+      (setq i (1+ ?Z))
+      (while (< i ?a)
+        (modify-syntax-entry i "_   " emacs-lisp-mode-syntax-table)
+        (setq i (1+ i)))
+      (setq i (1+ ?z))
+      (while (< i 128)
+        (modify-syntax-entry i "_   " emacs-lisp-mode-syntax-table)
+        (setq i (1+ i)))
+      (modify-syntax-entry ?  "    " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\t "    " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\n ">   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\f ">   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\; "<   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?` "'   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?' "'   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?, "'   " emacs-lisp-mode-syntax-table)
+      ;; Used to be singlequote; changed for flonums.
+      (modify-syntax-entry ?. "_   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?# "'   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\" "\"    " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\\ "\\   " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\( "()  " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\) ")(  " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\[ "(]  " emacs-lisp-mode-syntax-table)
+      (modify-syntax-entry ?\] ")[  " emacs-lisp-mode-syntax-table)))
+
+(define-abbrev-table 'lisp-mode-abbrev-table ())
+
+(defun lisp-mode-variables (lisp-syntax)
+  (cond (lisp-syntax
+          (if (not lisp-mode-syntax-table)
+              (progn (setq lisp-mode-syntax-table
+                           (copy-syntax-table emacs-lisp-mode-syntax-table))
+                     (modify-syntax-entry ?\| "\"   "
+                                          lisp-mode-syntax-table)
+                     (modify-syntax-entry ?\[ "_   "
+                                          lisp-mode-syntax-table)
+                     (modify-syntax-entry ?\] "_   "
+                                          lisp-mode-syntax-table)))
+          (set-syntax-table lisp-mode-syntax-table)))
+  (setq local-abbrev-table lisp-mode-abbrev-table)
+  (make-local-variable 'paragraph-start)
+  (setq paragraph-start (concat "^$\\|" page-delimiter))
+  (make-local-variable 'paragraph-separate)
+  (setq paragraph-separate paragraph-start)
+  (make-local-variable 'paragraph-ignore-fill-prefix)
+  (setq paragraph-ignore-fill-prefix t)
+  (make-local-variable 'indent-line-function)
+  (setq indent-line-function 'lisp-indent-line)
+  (make-local-variable 'indent-region-function)
+  (setq indent-region-function 'lisp-indent-region)
+  (make-local-variable 'parse-sexp-ignore-comments)
+  (setq parse-sexp-ignore-comments t)
+  (make-local-variable 'comment-start)
+  (setq comment-start ";")
+  (make-local-variable 'comment-start-skip)
+  (setq comment-start-skip ";+ *")
+  (make-local-variable 'comment-column)
+  (setq comment-column 40)
+  (make-local-variable 'comment-indent-hook)
+  (setq comment-indent-hook 'lisp-comment-indent))
+
+(defvar shared-lisp-mode-map ()
+  "Keymap for commands shared by all sorts of Lisp modes.")
+
+(if shared-lisp-mode-map
+    ()
+   (setq shared-lisp-mode-map (make-sparse-keymap))
+   (define-key shared-lisp-mode-map "\e\C-q" 'indent-sexp)
+   (define-key shared-lisp-mode-map "\177" 'backward-delete-char-untabify)
+   (define-key shared-lisp-mode-map "\t" 'lisp-indent-line))
+
+(defvar emacs-lisp-mode-map ()
+  "Keymap for Emacs Lisp mode.
+All commands in shared-lisp-mode-map are inherited by this map.")
+
+(if emacs-lisp-mode-map
+    ()
+  (setq emacs-lisp-mode-map
+        (nconc (make-sparse-keymap) shared-lisp-mode-map))
+  (define-key emacs-lisp-mode-map "\e\C-x" 'eval-defun))
+
+(defun emacs-lisp-mode ()
+  "Major mode for editing Lisp code to run in Emacs.
+Commands:
+Delete converts tabs to spaces as it moves back.
+Blank lines separate paragraphs.  Semicolons start comments.
+\\{emacs-lisp-mode-map}
+Entry to this mode calls the value of `emacs-lisp-mode-hook'
+if that value is non-nil."
+  (interactive)
+  (kill-all-local-variables)
+  (use-local-map emacs-lisp-mode-map)
+  (set-syntax-table emacs-lisp-mode-syntax-table)
+  (setq major-mode 'emacs-lisp-mode)
+  (setq mode-name "Emacs-Lisp")
+  (lisp-mode-variables nil)
+  (run-hooks 'emacs-lisp-mode-hook))
+
+(defvar lisp-mode-map ()
+  "Keymap for ordinary Lisp mode.
+All commands in `shared-lisp-mode-map' are inherited by this map.")
+
+(if lisp-mode-map
+    ()
+  (setq lisp-mode-map
+        (nconc (make-sparse-keymap) shared-lisp-mode-map))
+  (define-key lisp-mode-map "\e\C-x" 'lisp-send-defun)
+  (define-key lisp-mode-map "\C-c\C-l" 'run-lisp))
+
+(defun lisp-mode ()
+  "Major mode for editing Lisp code for Lisps other than GNU Emacs Lisp.
+Commands:
+Delete converts tabs to spaces as it moves back.
+Blank lines separate paragraphs.  Semicolons start comments.
+\\{lisp-mode-map}
+Note that `run-lisp' may be used either to start an inferior Lisp job
+or to switch back to an existing one.
+
+Entry to this mode calls the value of `lisp-mode-hook'
+if that value is non-nil."
+  (interactive)
+  (kill-all-local-variables)
+  (use-local-map lisp-mode-map)
+  (setq major-mode 'lisp-mode)
+  (setq mode-name "Lisp")
+  (lisp-mode-variables t)
+  (set-syntax-table lisp-mode-syntax-table)
+  (run-hooks 'lisp-mode-hook))
+
+;; This will do unless shell.el is loaded.
+(defun lisp-send-defun nil
+  "Send the current defun to the Lisp process made by \\[run-lisp]."
+  (interactive)
+  (error "Process lisp does not exist"))
+
+(defvar lisp-interaction-mode-map ()
+  "Keymap for Lisp Interaction moe.
+All commands in `shared-lisp-mode-map' are inherited by this map.")
+
+(if lisp-interaction-mode-map
+    ()
+  (setq lisp-interaction-mode-map
+        (nconc (make-sparse-keymap) shared-lisp-mode-map))
+  (define-key lisp-interaction-mode-map "\e\C-x" 'eval-defun)
+  (define-key lisp-interaction-mode-map "\n" 'eval-print-last-sexp))
+
+(defun lisp-interaction-mode ()
+  "Major mode for typing and evaluating Lisp forms.
+Like Lisp mode except that \\[eval-print-last-sexp] evals the Lisp expression
+before point, and prints its value into the buffer, advancing point.
+
+Commands:
+Delete converts tabs to spaces as it moves back.
+Paragraphs are separated only by blank lines.
+Semicolons start comments.
+\\{lisp-interaction-mode-map}
+Entry to this mode calls the value of `lisp-interaction-mode-hook'
+if that value is non-nil."
+  (interactive)
+  (kill-all-local-variables)
+  (use-local-map lisp-interaction-mode-map)
+  (setq major-mode 'lisp-interaction-mode)
+  (setq mode-name "Lisp Interaction")
+  (set-syntax-table emacs-lisp-mode-syntax-table)
+  (lisp-mode-variables nil)
+  (run-hooks 'lisp-interaction-mode-hook))
+
+(defun eval-print-last-sexp (arg)
+  "Evaluate sexp before point; print value into current buffer."
+  (interactive "P")
+  (eval-region
+    (let ((stab (syntax-table)))
+      (unwind-protect
+          (save-excursion
+            (set-syntax-table emacs-lisp-mode-syntax-table)
+            (forward-sexp -1)
+            (point))
+        (set-syntax-table stab)))
+    (point)
+    (current-buffer)))
+
+(defun eval-last-sexp (arg)
+  "Evaluate sexp before point; print value in minibuffer.
+With argument, print output into current buffer."
+  (interactive "P")
+  (eval-region
+    (let ((stab (syntax-table)))
+      (unwind-protect
+          (save-excursion
+            (set-syntax-table emacs-lisp-mode-syntax-table)
+            (forward-sexp -1)
+            (point))
+        (set-syntax-table stab)))
+    (point)
+    (if arg (current-buffer) t)))
+
+(defun eval-defun (arg)
+  "Evaluate defun that point is in or before.  Print value in minibuffer.
+With argument, edebug-defun it instead, preparing it for source-level
+debugging with the electric debugger."
+  (interactive "P")
+  (if arg (edebug-defun)
+    (save-excursion
+      (end-of-defun)
+      (let ((end (point)))
+        (beginning-of-defun)
+        (eval-region (point) end t)))))
+
+(defun lisp-comment-indent ()
+  (if (looking-at "\\s<\\s<\\s<")
+      (current-column)
+    (if (looking-at "\\s<\\s<")
+        (let ((tem (calculate-lisp-indent)))
+          (if (listp tem) (car tem) tem))
+      (skip-chars-backward " \t")
+      (max (if (bolp) 0 (1+ (current-column)))
+           comment-column))))
+
+(defconst lisp-indent-offset nil "")
+(defconst lisp-indent-function 'lisp-indent-function "")
+
+(defun lisp-indent-line (&optional whole-exp)
+  "Indent current line as Lisp code.
+With argument, indent any additional lines of the same expression
+rigidly along with this one."
+  (interactive "P")
+  (let ((indent (calculate-lisp-indent)) shift-amt beg end
+        (pos (- (point-max) (point))))
+    (beginning-of-line)
+    (setq beg (point))
+    (skip-chars-forward " \t")
+    (if (looking-at "\\s<\\s<\\s<")
+        ;; Don't alter indentation of a ;;; comment line.
+        nil
+      (if (and (looking-at "\\s<") (not (looking-at "\\s<\\s<")))
+          ;; Single-semicolon comment lines should be indented
+          ;; as comment lines, not as code.
+          (progn (indent-for-comment) (forward-char -1))
+        (if (listp indent) (setq indent (car indent)))
+        (setq shift-amt (- indent (current-column)))
+        (if (zerop shift-amt)
+            nil
+          (delete-region beg (point))
+          (indent-to indent)))
+      ;; If initial point was within line's indentation,
+      ;; position after the indentation.  Else stay at same point in text.
+      (if (> (- (point-max) pos) (point))
+          (goto-char (- (point-max) pos)))
+      ;; If desired, shift remaining lines of expression the same amount.
+      (and whole-exp (not (zerop shift-amt))
+           (save-excursion
+             (goto-char beg)
+             (forward-sexp 1)
+             (setq end (point))
+             (goto-char beg)
+             (forward-line 1)
+             (setq beg (point))
+             (> end beg))
+           (indent-code-rigidly beg end shift-amt)))))
+
+(defun calculate-lisp-indent (&optional parse-start)
+  "Return appropriate indentation for current line as Lisp code.
+In usual case returns an integer: the column to indent to.
+Can instead return a list, whose car is the column to indent to.
+This means that following lines at the same level of indentation
+should not necessarily be indented the same way.
+The second element of the list is the buffer position
+of the start of the containing expression."
+  (save-excursion
+    (beginning-of-line)
+    (let ((indent-point (point))
+          state paren-depth
+          ;; setting this to a number inhibits calling hook
+          (desired-indent nil)
+          (retry t)
+          last-sexp containing-sexp)
+      (if parse-start
+          (goto-char parse-start)
+          (beginning-of-defun))
+      ;; Find outermost containing sexp
+      (while (< (point) indent-point)
+        (setq state (parse-partial-sexp (point) indent-point 0)))
+      ;; Find innermost containing sexp
+      (while (and retry
+                  state
+                  (> (setq paren-depth (elt state 0)) 0))
+        (setq retry nil)
+        (setq last-sexp (elt state 2))
+        (setq containing-sexp (elt state 1))
+        ;; Position following last unclosed open.
+        (goto-char (1+ containing-sexp))
+        ;; Is there a complete sexp since then?
+        (if (and last-sexp (> last-sexp (point)))
+            ;; Yes, but is there a containing sexp after that?
+            (let ((peek (parse-partial-sexp last-sexp indent-point 0)))
+              (if (setq retry (car (cdr peek))) (setq state peek)))))
+      (if retry
+          nil
+        ;; Innermost containing sexp found
+        (goto-char (1+ containing-sexp))
+        (if (not last-sexp)
+            ;; indent-point immediately follows open paren.
+            ;; Don't call hook.
+            (setq desired-indent (current-column))
+          ;; Find the start of first element of containing sexp.
+          (parse-partial-sexp (point) last-sexp 0 t)
+          (cond ((looking-at "\\s(")
+                 ;; First element of containing sexp is a list.
+                 ;; Indent under that list.
+                 )
+                ((> (save-excursion (forward-line 1) (point))
+                    last-sexp)
+                 ;; This is the first line to start within the containing sexp.
+                 ;; It's almost certainly a function call.
+                 (if (= (point) last-sexp)
+                     ;; Containing sexp has nothing before this line
+                     ;; except the first element.  Indent under that element.
+                     nil
+                   ;; Skip the first element, find start of second (the first
+                   ;; argument of the function call) and indent under.
+                   (progn (forward-sexp 1)
+                          (parse-partial-sexp (point) last-sexp 0 t)))
+                 (backward-prefix-chars))
+                (t
+                 ;; Indent beneath first sexp on same line as last-sexp.
+                 ;; Again, it's almost certainly a function call.
+                 (goto-char last-sexp)
+                 (beginning-of-line)
+                 (parse-partial-sexp (point) last-sexp 0 t)
+                 (backward-prefix-chars)))))
+      ;; Point is at the point to indent under unless we are inside a string.
+      ;; Call indentation hook except when overriden by lisp-indent-offset
+      ;; or if the desired indentation has already been computed.
+      (let ((normal-indent (current-column)))
+        (cond ((elt state 3)
+               ;; Inside a string, don't change indentation.
+               (goto-char indent-point)
+               (skip-chars-forward " \t")
+               (current-column))
+              ((and (integerp lisp-indent-offset) containing-sexp)
+               ;; Indent by constant offset
+               (goto-char containing-sexp)
+               (+ (current-column) lisp-indent-offset))
+              (desired-indent)
+              ((and (boundp 'lisp-indent-function)
+                    lisp-indent-function
+                    (not retry))
+               (or (funcall lisp-indent-function indent-point state)
+                   normal-indent))
+              (t
+               normal-indent)))))))
+
+(defun lisp-indent-function (indent-point state)
+  (let ((normal-indent (current-column)))
+    (goto-char (1+ (elt state 1)))
+    (parse-partial-sexp (point) last-sexp 0 t)
+    (if (and (elt state 2)
+             (not (looking-at "\\sw\\|\\s_")))
+        ;; car of form doesn't seem to be a a symbol
+        (progn
+          (if (not (> (save-excursion (forward-line 1) (point))
+                      last-sexp))
+              (progn (goto-char last-sexp)
+                     (beginning-of-line)
+                     (parse-partial-sexp (point) last-sexp 0 t)))
+          ;; Indent under the list or under the first sexp on the
+          ;; same line as last-sexp.  Note that first thing on that
+          ;; line has to be complete sexp since we are inside the
+          ;; innermost containing sexp.
+          (backward-prefix-chars)
+          (current-column))
+      (let ((function (buffer-substring (point)
+                                        (progn (forward-sexp 1) (point))))
+            method)
+        (setq method (get (intern-soft function) 'lisp-indent-function))
+        (cond ((or (eq method 'defun)
+                   (and (null method)
+                        (> (length function) 3)
+                        (string-match "\\`def" function)))
+               (lisp-indent-defform state indent-point))
+              ((integerp method)
+               (lisp-indent-specform method state
+                                     indent-point normal-indent))
+              (method
+                (funcall method state indent-point)))))))
+
+(defconst lisp-body-indent 2 "")
+
+(defun lisp-indent-specform (count state indent-point normal-indent)
+  (let ((containing-form-start (elt state 1))
+        (i count)
+        body-indent containing-form-column)
+    ;; Move to the start of containing form, calculate indentation
+    ;; to use for non-distinguished forms (> count), and move past the
+    ;; function symbol.  lisp-indent-function guarantees that there is at
+    ;; least one word or symbol character following open paren of containing
+    ;; form.
+    (goto-char containing-form-start)
+    (setq containing-form-column (current-column))
+    (setq body-indent (+ lisp-body-indent containing-form-column))
+    (forward-char 1)
+    (forward-sexp 1)
+    ;; Now find the start of the last form.
+    (parse-partial-sexp (point) indent-point 1 t)
+    (while (and (< (point) indent-point)
+                (condition-case ()
+                    (progn
+                      (setq count (1- count))
+                      (forward-sexp 1)
+                      (parse-partial-sexp (point) indent-point 1 t))
+                  (error nil))))
+    ;; Point is sitting on first character of last (or count) sexp.
+    (if (> count 0)
+        ;; A distinguished form.  If it is the first or second form use double
+        ;; lisp-body-indent, else normal indent.  With lisp-body-indent bound
+        ;; to 2 (the default), this just happens to work the same with if as
+        ;; the older code, but it makes unwind-protect, condition-case,
+        ;; with-output-to-temp-buffer, et. al. much more tasteful.  The older,
+        ;; less hacked, behavior can be obtained by replacing below with
+        ;; (list normal-indent containing-form-start).
+        (if (<= (- i count) 1)
+            (list (+ containing-form-column (* 2 lisp-body-indent))
+                  containing-form-start)
+            (list normal-indent containing-form-start))
+      ;; A non-distinguished form.  Use body-indent if there are no
+      ;; distinguished forms and this is the first undistinguished form,
+      ;; or if this is the first undistinguished form and the preceding
+      ;; distinguished form has indentation at least as great as body-indent.
+      (if (or (and (= i 0) (= count 0))
+              (and (= count 0) (<= body-indent normal-indent)))
+          body-indent
+          normal-indent))))
+
+(defun lisp-indent-defform (state indent-point)
+  (goto-char (car (cdr state)))
+  (forward-line 1)
+  (if (> (point) (car (cdr (cdr state))))
+      (progn
+        (goto-char (car (cdr state)))
+        (+ lisp-body-indent (current-column)))))
+
+
+;; (put 'progn 'lisp-indent-function 0), say, causes progn to be indented
+;; like defun if the first form is placed on the next line, otherwise
+;; it is indented like any other form (i.e. forms line up under first).
+
+(put 'lambda 'lisp-indent-function 'defun)
+(put 'autoload 'lisp-indent-function 'defun)
+(put 'progn 'lisp-indent-function 0)
+(put 'prog1 'lisp-indent-function 1)
+(put 'prog2 'lisp-indent-function 2)
+(put 'save-excursion 'lisp-indent-function 0)
+(put 'save-window-excursion 'lisp-indent-function 0)
+(put 'save-restriction 'lisp-indent-function 0)
+(put 'let 'lisp-indent-function 1)
+(put 'let* 'lisp-indent-function 1)
+(put 'while 'lisp-indent-function 1)
+(put 'if 'lisp-indent-function 2)
+(put 'catch 'lisp-indent-function 1)
+(put 'condition-case 'lisp-indent-function 2)
+(put 'unwind-protect 'lisp-indent-function 1)
+(put 'with-output-to-temp-buffer 'lisp-indent-function 1)
+
+(defun indent-sexp (&optional endpos)
+  "Indent each line of the list starting just after point.
+If optional arg ENDPOS is given, indent each line, stopping when
+ENDPOS is encountered."
+  (interactive)
+  (let ((indent-stack (list nil)) (next-depth 0) last-depth bol
+        outer-loop-done inner-loop-done state this-indent
+        (last-point (point)))
+    ;; Get error now if we don't have a complete sexp after point.
+    (save-excursion (forward-sexp 1))
+    (save-excursion
+      (setq outer-loop-done nil)
+      (while (if endpos (< (point) endpos)
+               (not outer-loop-done))
+        (setq last-depth next-depth
+              inner-loop-done nil)
+        ;; Parse this line so we can learn the state
+        ;; to indent the next line.
+        ;; This inner loop goes through only once
+        ;; unless a line ends inside a string.
+        (while (and (not inner-loop-done)
+                    (not (setq outer-loop-done (eobp))))
+          (setq state (parse-partial-sexp (point) (progn (end-of-line) (point))
+                                          nil nil state))
+          (setq next-depth (car state))
+          ;; If the line contains a comment other than the sort
+          ;; that is indented like code,
+          ;; indent it now with indent-for-comment.
+          ;; Comments indented like code are right already.
+          ;; In any case clear the in-comment flag in the state
+          ;; because parse-partial-sexp never sees the newlines.
+          (if (car (nthcdr 4 state))
+              (progn (indent-for-comment)
+                     (end-of-line)
+                     (setcar (nthcdr 4 state) nil)))
+          ;; If this line ends inside a string,
+          ;; go straight to next line, remaining within the inner loop,
+          ;; and turn off the \-flag.
+          (if (car (nthcdr 3 state))
+              (progn
+                (forward-line 1)
+                (setcar (nthcdr 5 state) nil))
+            (setq inner-loop-done t)))
+        (and endpos
+             (while (<= next-depth 0)
+               (setq indent-stack (append indent-stack (list nil)))
+               (setq next-depth (1+ next-depth))
+               (setq last-depth (1+ last-depth))))
+        (or outer-loop-done
+            (setq outer-loop-done (<= next-depth 0)))
+        (if outer-loop-done
+            nil
+          (while (> last-depth next-depth)
+            (setq indent-stack (cdr indent-stack)
+                  last-depth (1- last-depth)))
+          (while (< last-depth next-depth)
+            (setq indent-stack (cons nil indent-stack)
+                  last-depth (1+ last-depth)))
+          ;; Now go to the next line and indent it according
+          ;; to what we learned from parsing the previous one.
+          (forward-line 1)
+          (setq bol (point))
+          (skip-chars-forward " \t")
+          ;; But not if the line is blank, or just a comment
+          ;; (except for double-semi comments; indent them as usual).
+          (if (or (eobp) (looking-at "\\s<\\|\n"))
+              nil
+            (if (and (car indent-stack)
+                     (>= (car indent-stack) 0))
+                (setq this-indent (car indent-stack))
+              (let ((val (calculate-lisp-indent
+                          (if (car indent-stack) (- (car indent-stack))
+                            last-point))))
+                (if (integerp val)
+                    (setcar indent-stack
+                            (setq this-indent val))
+                  (setcar indent-stack (- (car (cdr val))))
+                  (setq this-indent (car val)))))
+            (if (/= (current-column) this-indent)
+                (progn (delete-region bol (point))
+                       (indent-to this-indent)))))
+        (or outer-loop-done
+            (setq outer-loop-done (= (point) last-point))
+            (setq last-point (point)))))))
+
+;; Indent every line whose first char is between START and END inclusive.
+(defun lisp-indent-region (start end)
+  (save-excursion
+    (goto-char start)
+    (and (bolp) (not (eolp))
+         (lisp-indent-line))
+    (let ((endmark (copy-marker end)))
+      (indent-sexp endmark)
+      (set-marker endmark nil))))
+
+(defun indent-code-rigidly (start end arg &optional nochange-regexp)
+  "Indent all lines of code, starting in the region, sideways by ARG columns.
+Does not affect lines starting inside comments or strings, assuming that
+the start of the region is not inside them.
+
+Called from a program, takes args START, END, COLUMNS and NOCHANGE-REGEXP.
+The last is a regexp which, if matched at the beginning of a line,
+means don't indent that line."
+  (interactive "r\np")
+  (let (state)
+    (save-excursion
+      (goto-char end)
+      (setq end (point-marker))
+      (goto-char start)
+      (or (bolp)
+          (setq state (parse-partial-sexp (point)
+                                          (progn
+                                            (forward-line 1) (point))
+                                          nil nil state)))
+      (while (< (point) end)
+        (or (car (nthcdr 3 state))
+            (and nochange-regexp
+                 (looking-at nochange-regexp))
+            ;; If line does not start in string, indent it
+            (let ((indent (current-indentation)))
+              (delete-region (point) (progn (skip-chars-forward " \t") (point)))
+              (or (eolp)
+                  (indent-to (max 0 (+ indent arg)) 0))))
+        (setq state (parse-partial-sexp (point)
+                                        (progn
+                                          (forward-line 1) (point))
+                                        nil nil state))))))