(skip-chars-forward " \t" end)                   (skip-syntax-backward "w_" beg)                   (memq (char-syntax (following-char)) '(?w ?_)))            (buffer-substring-no-properties (point) (progn (forward-sexp 1) (point))))           ((progn (goto-char pos)                   (skip-chars-backward " \t" beg)                   (skip-syntax-forward "w_" end)                   (memq (char-syntax (preceding-char)) '(?w ?_)))            (buffer-substring-no-properties (point) (progn (forward-sexp -1) (point))))           (t nil))))))(defun hen-build (cmd args)  (when (and (buffer-modified-p)	     (or hen-autosave-buffer-before-compile		 (progn (beep)			(y-or-n-p "File modified. Save it? "))))    (save-buffer)) (compile-internal (mapconcat 'identity (cons cmd args) " ")                   "No more errors" "csc" nil                   `(("Error:.+in line \\([0-9]+\\):" 0 1 nil ,(buffer-file-name)))                   (lambda (ignored) "*csc*")))(defun hen-build-extension ()  (interactive)  (let* ((file-name (file-name-nondirectory		     (buffer-file-name))))    (hen-build hen-csc-program (list "-s" file-name hen-build-obj-arg))))(defun hen-build-program () (interactive) (let* ((file-name (file-name-nondirectory                     (buffer-file-name))))    (hen-build hen-csc-program (list file-name hen-build-exec-arg))))(define-derived-mode hen-mode scheme-mode "Hen" "Mode for editing chicken Scheme code.\\[hen-csi-eval-last-sexp] evaluates the sexp at/preceding point in csi.\\[hen-csi-eval-region] evaluates the region in csi.\\[hen-csi-eval-buffer] evaluates current buffer in csi.\\[hen-csi-eval-definition] evaluates the toplevel definition at point in csi.\\[hen-csi-send] reads a sexp from the user and evaluates it csi.\\[hen-csi-proc-delete] terminates csi subprocess.\\[hen-close-parens-at-point] closes parentheses for top-level sexp at point.\\[hen-build-extension] compiles the current file as a shared object\\[hen-build-program] compiles the current file as a program" (set-syntax-table hen-syntax-table) (setq local-abbrev-table scheme-mode-abbrev-table)  (define-key hen-mode-map (kbd "C-c C-e") 'hen-csi-eval-last-sexp)  (define-key hen-mode-map (kbd "C-c C-r") 'hen-csi-eval-region)  (define-key hen-mode-map (kbd "C-c C-b") 'hen-csi-eval-buffer)  (define-key hen-mode-map (kbd "C-c C-d") 'hen-csi-eval-definition)  (define-key hen-mode-map (kbd "C-c C-l") 'hen-build-unit)  (define-key hen-mode-map (kbd "C-c C-x") 'hen-csi-send)  (define-key hen-mode-map (kbd "C-c C-q") 'hen-csi-proc-delete)  (define-key hen-mode-map (kbd "C-c C-l") 'hen-build-extension)  (define-key hen-mode-map (kbd "C-c C-c") 'hen-build-program)  (define-key hen-mode-map (kbd "C-c C-]") 'hen-close-parens-at-point)  (define-key hen-mode-map [menu-bar scheme run-scheme] nil)  (define-key hen-mode-map [menu-bar shared build-prog] '("Compile File" hen-build-program))  (define-key hen-mode-map [menu-bar shared send-to-csi] '("Evaluate" . hen-csi-send))  (define-key hen-mode-map [menu-bar scheme build-as-extension]    '("Compile File as Extension" . hen-build-extension))  (define-key hen-mode-map [menu-bar scheme eval-buffer] '("Eval Buffer" . hen-csi-eval-buffer))  (define-key hen-mode-map [menu-bar scheme eval-region] '("Eval Region" . hen-csi-eval-region))  (define-key hen-mode-map [menu-bar scheme eval-last-sexp]    '("Eval Last S-Expression" . hen-csi-eval-last-sexp))  (setq font-lock-defaults	'((hen-font-lock-keywords	   hen-font-lock-keywords-1 hen-font-lock-keywords-2)	  nil t	  ((?+ . "w") (?- . "w") (?* . "w") (?/ . "w")	   (?. . "w") (?< . "w") (?> . "w") (?= . "w")	   (?? . "w") (?$ . "w") (?% . "w") (?_ . "w")	   (?& . "w") (?~ . "w") (?^ . "w") (?: . "w"))	  beginning-of-defun	  (font-lock-mark-block-function . mark-defun)))  (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 'adaptive-fill-mode)  (setq adaptive-fill-mode nil)  (make-local-variable 'parse-sexp-ignore-comments)  (setq parse-sexp-ignore-comments t)  (make-local-variable 'outline-regexp)  (setq outline-regexp ";;;;* \\|(")  (make-local-variable 'comment-start)  (setq comment-start ";")  (make-local-variable 'comment-column)  (setq comment-column 40)  (make-local-variable 'comment-add)  (setf comment-add 1)  );;stolen from cxref(defun hen-looking-backward-at (regexp) "Return t if text before point matches regular expression REGEXP.This function modifies the match data that `match-beginning',`match-end' and `match-data' access; save and restore the matchdata if you want to preserve them." (save-excursion   (let ((here (point)))     (if (re-search-backward regexp (point-min) t)         (if (re-search-forward regexp here t)             (= (point) here))))))(defun hen-proc-wait-prompt (proc prompt-re &optional timeout msg)  "Wait for the prompt of interactive process PROC. PROMPT-RE must bea regexp matching the prompt. TIMEOUT is the amount of time to wait insecs before giving up. MSG is the message to display while waiting."  (setq timeout (if (numberp timeout) (* timeout 2) 60))  (unless (stringp msg)    (setq msg (concat "wait for " hen-csi-proc-name "'s prompt")))  (goto-char (process-mark proc))  (if (hen-looking-backward-at prompt-re)      t    (while (and (> timeout 0) (not (hen-looking-backward-at prompt-re)))      (with-temp-message (setq msg (concat msg "."))	(accept-process-output proc 0 timeout))      (setq timeout (1- timeout))      (goto-char (process-mark proc)))    (with-temp-message (concat msg (if (> timeout 0)				       " got it!" " timeout!"))      (sit-for 0 100))    (> timeout 0))  )(defun hen-proc-send (question proc prompt-re &optional timeout msg) "Send the string QUESTION to interactive process proc. PROMPT-RE isthe regexp matching PROC's prompt. TIMEOUT is the amount of time towait in secs before giving up. MSG is the message to display whilewaiting."  (setq timeout (if (numberp timeout) (* timeout 2) 60))  (save-excursion    (set-buffer (process-buffer proc))    (widen)    (save-match-data      (goto-char (process-mark proc))      (if (hen-looking-backward-at prompt-re)	  (let ((start (match-end 0)))	    (narrow-to-region start (point-max))	    (process-send-string proc (concat question "\n"))	    (hen-proc-wait-prompt proc prompt-re timeout msg)	    (narrow-to-region start (match-beginning 0))	    (current-buffer))))))(defconst hen-csi-prompt-pattern "#;[0-9]*> ")(defconst hen-csi-proc-name "csi")(defconst hen-csi-buffer-name "*csi*")(defun hen-csi-buffer-create ()  "Creates a new buffer for csi, make it read-only."  (let ((buffer (get-buffer-create hen-csi-buffer-name)))    (with-current-buffer buffer      (make-local-variable 'buffer-read-only)      (setf buffer-read-only t))    buffer))(defun hen-csi-buffer-erase ()  "Erases csi buffer's content, used mainly when its process was beingreset."  (let ((buffer (get-buffer hen-csi-buffer-name)))    (unless (null buffer) (with-current-buffer buffer			    (setf buffer-read-only '())			    (erase-buffer)			    (setf buffer-read-only t)))))(defun hen-csi-buffer ()  (let ((buffer (or (get-buffer hen-csi-buffer-name) ;check if exists		    (hen-csi-buffer-create)))) ;... or create one    (display-buffer buffer)    buffer))(defun hen-csi-proc ()  (let ((proc (get-process hen-csi-proc-name)))    (if (and (processp proc)	     (eq (process-status proc) 'run))	proc      (setq proc	    (eval `(start-process hen-csi-proc-name (hen-csi-buffer)				  hen-csi-program				  "-no-init" "-quiet" "-:c" "-R" "srfi-1" "-R" "regex" "-R" "utils"				  ,@(split-string hen-eval-init-arg))))      (with-current-buffer (hen-csi-buffer)	(hen-proc-wait-prompt proc hen-csi-prompt-pattern)	proc))))(defun hen-csi-proc-delete ()  (interactive)  (let ((proc (get-process hen-csi-proc-name)))    (when (and (processp proc)	       (eq (process-status proc) 'run))      (delete-process proc))    (hen-csi-buffer-erase)    ()))(defun hen-csi-send (sexp)  "Evaluate SEXP in CSI"  (interactive   (let ((sexp (read-string "Evaluate S-expression: "))	 (send-sexp-p nil))     (unwind-protect	 (progn	   (let ((obarray (make-vector 11 0)))	     (read sexp)	     (setq send-sexp-p t)))       (unless send-sexp-p	 (setq send-sexp-p	       (y-or-n-p (format "`%s' is not a valid sexp! evaluate anyway? " sexp)))))     (list (if send-sexp-p sexp nil))))  (when (stringp sexp)    (let* ((proc (hen-csi-proc))	   (buf (hen-proc-send (concat sexp "\n") proc hen-csi-prompt-pattern))	   result len)      (unless (buffer-live-p buf)	(error "Internal hen-mode failure"))      (save-excursion	(with-current-buffer buf	  (setq result (buffer-string))	  (setq len (length result))	  (if (and (> len 0)		   (eq (aref result (1- len)) ?\n))	      (setq result (substring result 0 -1)))	  result)))))(defun hen-csi-eval-buffer ()  "Evaluate the current buffer in CSI"  (interactive)  (hen-csi-send (buffer-string)))(defun hen-csi-eval-region (beg end)  "Evaluate the current region in CSI."  (interactive "r")  (hen-csi-send (buffer-substring beg end)))(defun hen-csi-eval-last-sexp ()  "Evaluate the s-expression at point in CSI"  (interactive)  (hen-csi-eval-region (save-excursion (backward-sexp) (point))		       (point)))(defun hen-csi-eval-definition ()  "Evaluate the enclosing top-level form in CSI."  (interactive)  (hen-csi-eval-region (save-excursion			 (end-of-defun) (beginning-of-defun)			 (point))		       (save-excursion			 (end-of-defun) (point))));; from SLIME(defun hen-close-parens-at-point ()  "Close parenthesis at point to complete the top-level-form.  Simplyinserts ')' characters at point until `beginning-of-defun' and`end-of-defun' execute without errors, or internal variable`close-parens-limit' is exceeded."  (interactive)  (let ((close-parens-limit 16))    (loop for i from 1 to close-parens-limit	  until (save-excursion		  (beginning-of-defun)		  (ignore-errors (end-of-defun) t))	  do (insert ")"))))(provide 'hen)(run-hooks 'hen-load-hook);;; HEN.EL ends here