File:  [gforth] / gforth / gforth.el
Revision 1.8: download - view: text, annotated - select for diffs
Thu Aug 25 15:25:26 1994 UTC (26 years, 11 months ago) by anton
Branches: MAIN
CVS tags: HEAD
make now generates both images
the image names were changed
added C-level support for deferred words (dodefer)
made 2>r 2r> 2r@ 2rdrop primitives
some tuning of the outer interpreter; eliminated many words based on
 counted strings
Replaced the hash function with one that works better for larger tables

    1: ;; This file is part of GNU Emacs.
    2: ;; Changes by anton
    3: ;; This is a variant of forth.el that came with TILE.
    4: ;; I left most of this stuff untouched and made just a few changes for 
    5: ;; the things I use (mainly indentation and syntax tables).
    6: ;; So there is still a lot of work to do to adapt this to gforth.
    7: 
    8: ;; GNU Emacs is distributed in the hope that it will be useful,
    9: ;; but WITHOUT ANY WARRANTY.  No author or distributor
   10: ;; accepts responsibility to anyone for the consequences of using it
   11: ;; or for whether it serves any particular purpose or works at all,
   12: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
   13: ;; License for full details.
   14: 
   15: ;; Everyone is granted permission to copy, modify and redistribute
   16: ;; GNU Emacs, but only under the conditions described in the
   17: ;; GNU Emacs General Public License.   A copy of this license is
   18: ;; supposed to have been given to you along with GNU Emacs so you
   19: ;; can know your rights and responsibilities.  It should be in a
   20: ;; file named COPYING.  Among other things, the copyright notice
   21: ;; and this notice must be preserved on all copies.
   22: 
   23: ;;; $Header: /nfs/unsafe/cvs-repository/src-master/gforth/gforth.el,v 1.8 1994/08/25 15:25:26 anton Exp $
   24: 
   25: ;;-------------------------------------------------------------------
   26: ;; A Forth indentation, documentation search and interaction library
   27: ;;-------------------------------------------------------------------
   28: ;;
   29: ;; Written by Goran Rydqvist, gorry@ida.liu.se, Summer 1988
   30: ;; Started:	16 July 88
   31: ;; Version:	2.10
   32: ;; Last update:	5 December 1989 by Mikael Patel, mip@ida.liu.se
   33: ;; Last update:	25 June 1990 by Goran Rydqvist, gorry@ida.liu.se
   34: ;;
   35: ;; Documentation: See forth-mode (^HF forth-mode)
   36: ;;-------------------------------------------------------------------
   37: 
   38: 
   39: (defvar forth-positives
   40:   " : :noname begin do ?do while if ?dup-if ?dup-not-if else case create does> exception> struct [if] [else] "
   41:   "Contains all words which will cause the indent-level to be incremented
   42: on the next line.
   43: OBS! All words in forth-positives must be surrounded by spaces.")
   44: 
   45: (defvar forth-negatives
   46:   " ; until repeat while +loop loop s+loop else then endif again endcase does> end-struct [then] [else] "
   47:   "Contains all words which will cause the indent-level to be decremented
   48: on the current line.
   49: OBS! All words in forth-negatives must be surrounded by spaces.")
   50: 
   51: (defvar forth-zeroes
   52:   " : :noname "
   53:   "Contains all words which causes the indent to go to zero")
   54: 
   55: (defvar forth-prefixes
   56:   " postpone [compile] ['] [char] "
   57:   "words that prefix and escape other words")
   58: 
   59: (defvar forth-mode-abbrev-table nil
   60:   "Abbrev table in use in Forth-mode buffers.")
   61: 
   62: (define-abbrev-table 'forth-mode-abbrev-table ())
   63: 
   64: (defvar forth-mode-map nil
   65:   "Keymap used in Forth mode.")
   66: 
   67: (if (not forth-mode-map)
   68:     (setq forth-mode-map (make-sparse-keymap)))
   69: 
   70: (global-set-key "\e\C-m" 'forth-send-paragraph)
   71: (global-set-key "\C-x\C-m" 'forth-split)
   72: (global-set-key "\e " 'forth-reload)
   73: 
   74: (define-key forth-mode-map "\M-\C-x" 'compile)
   75: (define-key forth-mode-map "\C-x\\" 'comment-region)
   76: (define-key forth-mode-map "\C-x|" 'uncomment-region)
   77: (define-key forth-mode-map "\C-x~" 'forth-remove-tracers)
   78: (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph)
   79: (define-key forth-mode-map "\eo" 'forth-send-buffer)
   80: (define-key forth-mode-map "\C-x\C-m" 'forth-split)
   81: (define-key forth-mode-map "\e " 'forth-reload)
   82: (define-key forth-mode-map "\t" 'forth-indent-command)
   83: (define-key forth-mode-map "\C-m" 'reindent-then-newline-and-indent)
   84: (define-key forth-mode-map "\M-q" 'forth-fill-paragraph)
   85: 
   86: (defvar forth-mode-syntax-table nil
   87:   "Syntax table in use in Forth-mode buffers.")
   88: 
   89: (if (not forth-mode-syntax-table)
   90:     (progn
   91:       (setq forth-mode-syntax-table (make-syntax-table))
   92:       (let ((char 0))
   93: 	(while (< char ?!)
   94: 	  (modify-syntax-entry char " " forth-mode-syntax-table)
   95: 	  (setq char (1+ char)))
   96: 	(while (< char 256)
   97: 	  (modify-syntax-entry char "w" forth-mode-syntax-table)
   98: 	  (setq char (1+ char))))
   99:       (modify-syntax-entry ?\" "\"" forth-mode-syntax-table)
  100:       (modify-syntax-entry ?\\ "<" forth-mode-syntax-table)
  101:       (modify-syntax-entry ?\n ">" forth-mode-syntax-table)
  102:       ))
  103: ;I do not define '(' and ')' as comment delimiters, because emacs
  104: ;only supports one comment syntax (and a hack to accomodate C++); I
  105: ;use '\' for natural language comments and '(' for formal comments
  106: ;like stack comments, so for me it's better to have emacs treat '\'
  107: ;comments as comments. I you want it different, make the appropriate
  108: ;changes (best in your .emacs file).
  109: ;
  110: ;Hmm, the C++ hack could be used to support both comment syntaxes: we
  111: ;can have different comment styles, if both comments start with the
  112: ;same character. we could use ' ' as first and '(' and '\' as second
  113: ;character. However this would fail for G\ comments.
  114: 
  115: (defconst forth-indent-level 4
  116:   "Indentation of Forth statements.")
  117: 
  118: (defun forth-mode-variables ()
  119:   (set-syntax-table forth-mode-syntax-table)
  120:   (setq local-abbrev-table forth-mode-abbrev-table)
  121:   (make-local-variable 'paragraph-start)
  122:   (setq paragraph-start (concat "^$\\|" page-delimiter))
  123:   (make-local-variable 'paragraph-separate)
  124:   (setq paragraph-separate paragraph-start)
  125:   (make-local-variable 'indent-line-function)
  126:   (setq indent-line-function 'forth-indent-line)
  127: ;  (make-local-variable 'require-final-newline)
  128: ;  (setq require-final-newline t)
  129:   (make-local-variable 'comment-start)
  130:   (setq comment-start "\\ ")
  131:   ;(make-local-variable 'comment-end)
  132:   ;(setq comment-end " )")
  133:   (make-local-variable 'comment-column)
  134:   (setq comment-column 40)
  135:   (make-local-variable 'comment-start-skip)
  136:   (setq comment-start-skip "\\ ")
  137:   (make-local-variable 'comment-indent-hook)
  138:   (setq comment-indent-hook 'forth-comment-indent)
  139:   (make-local-variable 'parse-sexp-ignore-comments)
  140:   (setq parse-sexp-ignore-comments t))
  141:   
  142: ;;;###autoload
  143: (defun forth-mode ()
  144:   "
  145: Major mode for editing Forth code. Tab indents for Forth code. Comments
  146: are delimited with ( ). Paragraphs are separated by blank lines only.
  147: Delete converts tabs to spaces as it moves back.
  148: \\{forth-mode-map}
  149:  Forth-split
  150:     Positions the current buffer on top and a forth-interaction window
  151:     below. The window size is controlled by the forth-percent-height
  152:     variable (see below).
  153:  Forth-reload
  154:     Reloads the forth library and restarts the forth process.
  155:  Forth-send-buffer
  156:     Sends the current buffer, in text representation, as input to the
  157:     forth process.
  158:  Forth-send-paragraph
  159:     Sends the previous or the current paragraph to the forth-process.
  160:     Note that the cursor only need to be with in the paragraph to be sent.
  161: forth-documentation
  162:     Search for documentation of forward adjacent to cursor. Note! To use
  163:     this mode you have to add a line, to your .emacs file, defining the
  164:     directories to search through for documentation files (se variable
  165:     forth-help-load-path below) e.g. (setq forth-help-load-path '(nil)).
  166: 
  167: Variables controlling interaction and startup
  168:  forth-percent-height
  169:     Tells split how high to make the edit portion, in percent of the
  170:     current screen height.
  171:  forth-program-name
  172:     Tells the library which program name to execute in the interation
  173:     window.
  174: 
  175: Variables controlling indentation style:
  176:  forth-positives
  177:     A string containing all words which causes the indent-level of the
  178:     following line to be incremented.
  179:     OBS! Each word must be surronded by spaces.
  180:  forth-negatives
  181:     A string containing all words which causes the indentation of the
  182:     current line to be decremented, if the word begin the line. These
  183:     words also has a cancelling effect on the indent-level of the
  184:     following line, independent of position.
  185:     OBS! Each word must be surronded by spaces.
  186:  forth-zeroes
  187:     A string containing all words which causes the indentation of the
  188:     current line to go to zero, if the word begin the line.
  189:     OBS! Each word must be surronded by spaces.
  190:  forth-indent-level
  191:     Indentation increment/decrement of Forth statements.
  192: 
  193:  Note! A word which decrements the indentation of the current line, may
  194:     also be mentioned in forth-positives to cause the indentation to
  195:     resume the previous level.
  196: 
  197: Variables controling documentation search
  198:  forth-help-load-path
  199:     List of directories to search through to find *.doc
  200:     (forth-help-file-suffix) files. Nil means current default directory.
  201:     The specified directories must contain at least one .doc file. If it
  202:     does not and you still want the load-path to scan that directory, create
  203:     an empty file dummy.doc.
  204:  forth-help-file-suffix
  205:     The file names to search for in each directory specified by
  206:     forth-help-load-path. Defaulted to '*.doc'. 
  207: "
  208:   (interactive)
  209:   (kill-all-local-variables)
  210:   (use-local-map forth-mode-map)
  211:   (setq mode-name "Forth")
  212:   (setq major-mode 'forth-mode)
  213:   (forth-mode-variables)
  214: ;  (if (not (forth-process-running-p))
  215: ;      (run-forth forth-program-name))
  216:   (run-hooks 'forth-mode-hook))
  217: 
  218: (setq forth-mode-hook
  219:       '(lambda () (setq compile-command "gforth ")))
  220: 
  221: (defun forth-fill-paragraph () 
  222:   "Fill comments (starting with '\'; do not fill code (block style
  223: programmers who tend to fill code won't use emacs anyway:-)."
  224:   ; currently only comments at the start of the line are
  225:   ; filled. something like lisp-fill-paragraph may be better
  226:   (interactive)
  227:   (save-excursion
  228:     (beginning-of-line)
  229:     (if (looking-at "[ \t]*\\\\[ \t]+")
  230: 	(progn (goto-char (match-end 0))
  231: 	       (set-fill-prefix)
  232: 	       (fill-paragraph nil)))))
  233: 
  234: (defun forth-comment-indent ()
  235:   (save-excursion
  236:     (beginning-of-line)
  237:     (if (looking-at ":[ \t]*")
  238: 	(progn
  239: 	  (end-of-line)
  240: 	  (skip-chars-backward " \t\n")
  241: 	  (1+ (current-column)))
  242:       comment-column)))
  243: 
  244: (defun forth-current-indentation ()
  245:   (save-excursion
  246:     (beginning-of-line)
  247:     (back-to-indentation)
  248:     (current-column)))
  249: 
  250: (defun forth-delete-indentation ()
  251:   (let ((b nil) (m nil))
  252:     (save-excursion
  253:       (beginning-of-line)
  254:       (setq b (point))
  255:       (back-to-indentation)
  256:       (setq m (point)))
  257:     (delete-region b m)))
  258: 
  259: (defun forth-indent-line (&optional flag)
  260:   "Correct indentation of the current Forth line."
  261:   (let ((x (forth-calculate-indent)))
  262:     (forth-indent-to x)))
  263:   
  264: (defun forth-indent-command ()
  265:   (interactive)
  266:   (forth-indent-line t))
  267: 
  268: (defun forth-indent-to (x)
  269:   (let ((p nil))
  270:     (setq p (- (current-column) (forth-current-indentation)))
  271:     (forth-delete-indentation)
  272:     (beginning-of-line)
  273:     (indent-to x)
  274:     (if (> p 0) (forward-char p))))
  275: 
  276: ;;Calculate indent
  277: (defun forth-calculate-indent ()
  278:   (let ((w1 nil) (indent 0) (centre 0))
  279:     (save-excursion
  280:       (beginning-of-line)
  281:       (skip-chars-backward " \t\n")
  282:       (beginning-of-line)
  283:       (back-to-indentation)
  284:       (setq indent (current-column))
  285:       (setq centre indent)
  286:       (setq indent (+ indent (forth-sum-line-indentation))))
  287:     (save-excursion
  288:       (beginning-of-line)
  289:       (back-to-indentation)
  290:       (let ((p (point)))
  291: 	(skip-chars-forward "^ \t\n")
  292: 	(setq w1 (buffer-substring p (point)))))
  293:     (if (> (- indent centre) forth-indent-level)
  294: 	(setq indent (+ centre forth-indent-level)))
  295:     (if (> (- centre indent) forth-indent-level)
  296: 	(setq indent (- centre forth-indent-level)))
  297:     (if (< indent 0) (setq indent 0))
  298:     (setq indent (- indent
  299: 		    (if (string-match 
  300: 			 (regexp-quote (concat " " w1 " "))
  301: 			 forth-negatives)
  302: 			forth-indent-level 0)))
  303:     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zeroes)
  304: 	(setq indent 0))
  305:     indent))
  306: 
  307: (defun forth-sum-line-indentation ()
  308:   "Add upp the positive and negative weights of all words on the current line."
  309:   (let ((b (point)) (e nil) (sum 0) (w nil) (t1 nil) (t2 nil) (first t))
  310:     (end-of-line) (setq e (point))
  311:     (goto-char b)
  312:     (while (< (point) e)
  313:       (setq w (forth-next-word))
  314:       (setq t1 (string-match (regexp-quote (concat " " w " "))
  315: 			     forth-positives))
  316:       (setq t2 (string-match (regexp-quote (concat " " w " "))
  317: 			     forth-negatives))
  318:       (if t1
  319: 	  (setq sum (+ sum forth-indent-level)))
  320:       (if (and t2 (not first))
  321: 	  (setq sum (- sum forth-indent-level)))
  322:       (skip-chars-forward " \t")
  323:       (setq first nil))
  324:     sum))
  325: 
  326: 
  327: (defun forth-next-word ()
  328:   "Return the next forth-word. Skip anything that the forth-word takes from
  329: the input stream (comments, arguments, etc.)"
  330: ;actually, it would be better to use commands based on the
  331: ;syntax-table or comment-start etc.
  332:   (let ((w1 nil))
  333:     (while (not w1)
  334:       (skip-chars-forward " \t\n")
  335:       (let ((p (point)))
  336: 	(skip-chars-forward "^ \t\n")
  337: 	(setq w1 (buffer-substring p (point))))
  338:       (cond ((string-match "\"" w1)
  339: 	     (progn
  340: 	       (skip-chars-forward "^\"\n")
  341: 	       (forward-char)))
  342: 	    ((string-match "\\\\" w1)
  343: 	     (progn
  344: 	       (end-of-line)
  345: 	       ))
  346: 	    ((or (equal "(" w1) (equal ".(" w1))
  347: 	     (progn
  348: 	       (skip-chars-forward "^)\n")
  349: 	       (forward-char)))
  350: 	    ((string-match (regexp-quote (concat " " w1 " ")) forth-prefixes)
  351: 	     (progn (skip-chars-forward " \t\n")
  352: 		    (skip-chars-forward "^ \t\n")))
  353: 	    (t nil)))
  354:     w1))
  355:       
  356: 
  357: ;; Forth commands
  358: 
  359: (defun forth-remove-tracers ()
  360:   "Remove tracers of the form `~~ '. Queries the user for each occurrence."
  361:   (interactive)
  362:   (query-replace "~~ " ""))
  363: 
  364: (defvar forth-program-name "gforth"
  365:   "*Program invoked by the `run-forth' command.")
  366: 
  367: (defvar forth-band-name nil
  368:   "*Band loaded by the `run-forth' command.")
  369: 
  370: (defvar forth-program-arguments nil
  371:   "*Arguments passed to the Forth program by the `run-forth' command.")
  372: 
  373: (defun run-forth (command-line)
  374:   "Run an inferior Forth process. Output goes to the buffer `*forth*'.
  375: With argument, asks for a command line. Split up screen and run forth 
  376: in the lower portion. The current-buffer when called will stay in the
  377: upper portion of the screen, and all other windows are deleted.
  378: Call run-forth again to make the *forth* buffer appear in the lower
  379: part of the screen."
  380:   (interactive
  381:    (list (let ((default
  382: 		 (or forth-process-command-line
  383: 		     (forth-default-command-line))))
  384: 	   (if current-prefix-arg
  385: 	       (read-string "Run Forth: " default)
  386: 	       default))))
  387:   (setq forth-process-command-line command-line)
  388:   (forth-start-process command-line)
  389:   (forth-split)
  390:   (forth-set-runlight forth-runlight:input))
  391: 
  392: (defun reset-forth ()
  393:   "Reset the Forth process."
  394:   (interactive)
  395:   (let ((process (get-process forth-program-name)))
  396:     (cond ((or (not process)
  397: 	       (not (eq (process-status process) 'run))
  398: 	       (yes-or-no-p
  399: "The Forth process is running, are you SURE you want to reset it? "))
  400: 	   (message "Resetting Forth process...")
  401: 	   (forth-reload)
  402: 	   (message "Resetting Forth process...done")))))
  403: 
  404: (defun forth-default-command-line ()
  405:   (concat forth-program-name " -emacs"
  406: 	  (if forth-program-arguments
  407: 	      (concat " " forth-program-arguments)
  408: 	      "")
  409: 	  (if forth-band-name
  410: 	      (concat " -band " forth-band-name)
  411: 	      "")))
  412: 
  413: ;;;; Internal Variables
  414: 
  415: (defvar forth-process-command-line nil
  416:   "Command used to start the most recent Forth process.")
  417: 
  418: (defvar forth-previous-send ""
  419:   "Most recent expression transmitted to the Forth process.")
  420: 
  421: (defvar forth-process-filter-queue '()
  422:   "Queue used to synchronize filter actions properly.")
  423: 
  424: (defvar forth-prompt "ok"
  425:   "The current forth prompt string.")
  426: 
  427: (defvar forth-start-hook nil
  428:   "If non-nil, a procedure to call when the Forth process is started.
  429: When called, the current buffer will be the Forth process-buffer.")
  430: 
  431: (defvar forth-signal-death-message nil
  432:   "If non-nil, causes a message to be generated when the Forth process dies.")
  433: 
  434: (defvar forth-percent-height 62
  435:   "Tells run-forth how high the upper window should be in percent.")
  436: 
  437: (defconst forth-runlight:input ?I
  438:   "The character displayed when the Forth process is waiting for input.")
  439: 
  440: (defvar forth-mode-string ""
  441:   "String displayed in the mode line when the Forth process is running.")
  442: 
  443: ;;;; Evaluation Commands
  444: 
  445: (defun forth-send-string (&rest strings)
  446:   "Send the string arguments to the Forth process.
  447: The strings are concatenated and terminated by a newline."
  448:   (cond ((forth-process-running-p)
  449: 	 (forth-send-string-1 strings))
  450: 	((yes-or-no-p "The Forth process has died.  Reset it? ")
  451: 	 (reset-forth)
  452: 	 (goto-char (point-max))
  453: 	 (forth-send-string-1 strings))))
  454: 
  455: (defun forth-send-string-1 (strings)
  456:   (let ((string (apply 'concat strings)))
  457:     (forth-send-string-2 string)))
  458: 
  459: (defun forth-send-string-2 (string)
  460:   (let ((process (get-process forth-program-name)))
  461:     (if (not (eq (current-buffer) (get-buffer forth-program-name)))
  462: 	(progn
  463: 	 (forth-process-filter-output string)
  464: 	 (forth-process-filter:finish)))
  465:     (send-string process (concat string "\n"))
  466:     (if (eq (current-buffer) (process-buffer process))
  467: 	(set-marker (process-mark process) (point)))))
  468: 
  469: 
  470: (defun forth-send-region (start end)
  471:   "Send the current region to the Forth process.
  472: The region is sent terminated by a newline."
  473:   (interactive "r")
  474:   (let ((process (get-process forth-program-name)))
  475:     (if (and process (eq (current-buffer) (process-buffer process)))
  476: 	(progn (goto-char end)
  477: 	       (set-marker (process-mark process) end))))
  478:   (forth-send-string "\n" (buffer-substring start end) "\n"))
  479: 
  480: (defun forth-end-of-paragraph ()
  481:   (if (looking-at "[\t\n ]+") (skip-chars-backward  "\t\n "))
  482:   (if (not (re-search-forward "\n[ \t]*\n" nil t))
  483:       (goto-char (point-max))))
  484: 
  485: (defun forth-send-paragraph ()
  486:   "Send the current or the previous paragraph to the Forth process"
  487:   (interactive)
  488:   (let (end)
  489:     (save-excursion
  490:       (forth-end-of-paragraph)
  491:       (skip-chars-backward  "\t\n ")
  492:       (setq end (point))
  493:       (if (re-search-backward "\n[ \t]*\n" nil t)
  494: 	  (setq start (point))
  495: 	(goto-char (point-min)))
  496:       (skip-chars-forward  "\t\n ")
  497:       (forth-send-region (point) end))))
  498:   
  499: (defun forth-send-buffer ()
  500:   "Send the current buffer to the Forth process."
  501:   (interactive)
  502:   (if (eq (current-buffer) (forth-process-buffer))
  503:       (error "Not allowed to send this buffer's contents to Forth"))
  504:   (forth-send-region (point-min) (point-max)))
  505: 
  506: 
  507: ;;;; Basic Process Control
  508: 
  509: (defun forth-start-process (command-line)
  510:   (let ((buffer (get-buffer-create "*forth*")))
  511:     (let ((process (get-buffer-process buffer)))
  512:       (save-excursion
  513: 	(set-buffer buffer)
  514: 	(progn (if process (delete-process process))
  515: 	       (goto-char (point-max))
  516: 	       (setq mode-line-process '(": %s"))
  517: 	       (add-to-global-mode-string 'forth-mode-string)
  518: 	       (setq process
  519: 		     (apply 'start-process
  520: 			    (cons forth-program-name
  521: 				  (cons buffer
  522: 					(forth-parse-command-line
  523: 					 command-line)))))
  524: 	       (set-marker (process-mark process) (point-max))
  525: 	       (forth-process-filter-initialize t)
  526: 	       (forth-modeline-initialize)
  527: 	       (set-process-sentinel process 'forth-process-sentinel)
  528: 	       (set-process-filter process 'forth-process-filter)
  529: 	       (run-hooks 'forth-start-hook)))
  530:     buffer)))
  531: 
  532: (defun forth-parse-command-line (string)
  533:   (setq string (substitute-in-file-name string))
  534:   (let ((start 0)
  535: 	(result '()))
  536:     (while start
  537:       (let ((index (string-match "[ \t]" string start)))
  538: 	(setq start
  539: 	      (cond ((not index)
  540: 		     (setq result
  541: 			   (cons (substring string start)
  542: 				 result))
  543: 		     nil)
  544: 		    ((= index start)
  545: 		     (string-match "[^ \t]" string start))
  546: 		    (t
  547: 		     (setq result
  548: 			   (cons (substring string start index)
  549: 				 result))
  550: 		     (1+ index))))))
  551:     (nreverse result)))
  552: 
  553: 
  554: (defun forth-process-running-p ()
  555:   "True iff there is a Forth process whose status is `run'."
  556:   (let ((process (get-process forth-program-name)))
  557:     (and process
  558: 	 (eq (process-status process) 'run))))
  559: 
  560: (defun forth-process-buffer ()
  561:   (let ((process (get-process forth-program-name)))
  562:     (and process (process-buffer process))))
  563: 
  564: ;;;; Process Filter
  565: 
  566: (defun forth-process-sentinel (proc reason)
  567:   (let ((inhibit-quit nil))
  568:     (forth-process-filter-initialize (eq reason 'run))
  569:     (if (eq reason 'run)
  570: 	(forth-modeline-initialize)
  571: 	(setq forth-mode-string "")))
  572:   (if (and (not (memq reason '(run stop)))
  573: 	   forth-signal-death-message)
  574:       (progn (beep)
  575: 	     (message
  576: "The Forth process has died!  Do M-x reset-forth to restart it"))))
  577: 
  578: (defun forth-process-filter-initialize (running-p)
  579:   (setq forth-process-filter-queue (cons '() '()))
  580:   (setq forth-prompt "ok"))
  581: 
  582: 
  583: (defun forth-process-filter (proc string)
  584:   (forth-process-filter-output string)
  585:   (forth-process-filter:finish))
  586: 
  587: (defun forth-process-filter:enqueue (action)
  588:   (let ((next (cons action '())))
  589:     (if (cdr forth-process-filter-queue)
  590: 	(setcdr (cdr forth-process-filter-queue) next)
  591: 	(setcar forth-process-filter-queue next))
  592:     (setcdr forth-process-filter-queue next)))
  593: 
  594: (defun forth-process-filter:finish ()
  595:   (while (car forth-process-filter-queue)
  596:     (let ((next (car forth-process-filter-queue)))
  597:       (setcar forth-process-filter-queue (cdr next))
  598:       (if (not (cdr next))
  599: 	  (setcdr forth-process-filter-queue '()))
  600:       (apply (car (car next)) (cdr (car next))))))
  601: 
  602: ;;;; Process Filter Output
  603: 
  604: (defun forth-process-filter-output (&rest args)
  605:   (if (not (and args
  606: 		(null (cdr args))
  607: 		(stringp (car args))
  608: 		(string-equal "" (car args))))
  609:       (forth-process-filter:enqueue
  610:        (cons 'forth-process-filter-output-1 args))))
  611: 
  612: (defun forth-process-filter-output-1 (&rest args)
  613:   (save-excursion
  614:     (forth-goto-output-point)
  615:     (apply 'insert-before-markers args)))
  616: 
  617: (defun forth-guarantee-newlines (n)
  618:   (save-excursion
  619:     (forth-goto-output-point)
  620:     (let ((stop nil))
  621:       (while (and (not stop)
  622: 		  (bolp))
  623: 	(setq n (1- n))
  624: 	(if (bobp)
  625: 	    (setq stop t)
  626: 	  (backward-char))))
  627:     (forth-goto-output-point)
  628:     (while (> n 0)
  629:       (insert-before-markers ?\n)
  630:       (setq n (1- n)))))
  631: 
  632: (defun forth-goto-output-point ()
  633:   (let ((process (get-process forth-program-name)))
  634:     (set-buffer (process-buffer process))
  635:     (goto-char (process-mark process))))
  636: 
  637: (defun forth-modeline-initialize ()
  638:   (setq forth-mode-string "  "))
  639: 
  640: (defun forth-set-runlight (runlight)
  641:   (aset forth-mode-string 0 runlight)
  642:   (forth-modeline-redisplay))
  643: 
  644: (defun forth-modeline-redisplay ()
  645:   (save-excursion (set-buffer (other-buffer)))
  646:   (set-buffer-modified-p (buffer-modified-p))
  647:   (sit-for 0))
  648: 
  649: ;;;; Process Filter Operations
  650: 
  651: (defun add-to-global-mode-string (x)
  652:   (cond ((null global-mode-string)
  653: 	 (setq global-mode-string (list "" x " ")))
  654: 	((not (memq x global-mode-string))
  655: 	 (setq global-mode-string
  656: 	       (cons ""
  657: 		     (cons x
  658: 			   (cons " "
  659: 				 (if (equal "" (car global-mode-string))
  660: 				     (cdr global-mode-string)
  661: 				     global-mode-string))))))))
  662: 
  663: 
  664: ;; Misc
  665: 
  666: (setq auto-mode-alist (append auto-mode-alist
  667: 				'(("\\.fs$" . forth-mode))))
  668: 
  669: (defun forth-split ()
  670:   (interactive)
  671:   (forth-split-1 "*forth*"))
  672: 
  673: (defun forth-split-1 (buffer)
  674:   (if (not (eq (window-buffer) (get-buffer buffer)))
  675:       (progn
  676: 	(delete-other-windows)
  677: 	(split-window-vertically
  678: 	 (/ (* (screen-height) forth-percent-height) 100))
  679: 	(other-window 1)
  680: 	(switch-to-buffer buffer)
  681: 	(goto-char (point-max))
  682: 	(other-window 1))))
  683:     
  684: (defun forth-reload ()
  685:   (interactive)
  686:   (let ((process (get-process forth-program-name)))
  687:     (if process (kill-process process t)))
  688:   (sleep-for-millisecs 100)
  689:   (forth-mode))
  690: 
  691: 
  692: ;; Special section for forth-help
  693: 
  694: (defvar forth-help-buffer "*Forth-help*"
  695:   "Buffer used to display the requested documentation.")
  696: 
  697: (defvar forth-help-load-path nil
  698:   "List of directories to search through to find *.doc
  699:  (forth-help-file-suffix) files. Nil means current default directory.
  700:  The specified directories must contain at least one .doc file. If it
  701:  does not and you still want the load-path to scan that directory, create
  702:  an empty file dummy.doc.")
  703: 
  704: (defvar forth-help-file-suffix "*.doc"
  705:   "The file names to search for in each directory.")
  706: 
  707: (setq forth-search-command-prefix "grep -n \"^    [^(]* ")
  708: (defvar forth-search-command-suffix "/dev/null")
  709: (defvar forth-grep-error-regexp ": No such file or directory")
  710: 
  711: (defun forth-function-called-at-point ()
  712:   "Return the space delimited word a point."
  713:   (save-excursion
  714:     (save-restriction
  715:       (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
  716:       (skip-chars-backward "^ \t\n" (point-min))
  717:       (if (looking-at "[ \t\n]")
  718: 	  (forward-char 1))
  719:       (let (obj (p (point)))
  720: 	(skip-chars-forward "^ \t\n")
  721: 	(buffer-substring p (point))))))
  722: 
  723: (defun forth-help-names-extend-comp (path-list result)
  724:   (cond ((null path-list) result)
  725: 	((null (car path-list))
  726: 	 (forth-help-names-extend-comp (cdr path-list) 
  727: 	       (concat result forth-help-file-suffix " ")))
  728: 	(t (forth-help-names-extend-comp
  729: 	    (cdr path-list) (concat result
  730: 				    (expand-file-name (car path-list)) "/"
  731: 				    forth-help-file-suffix " ")))))
  732: 
  733: (defun forth-help-names-extended ()
  734:   (if forth-help-load-path
  735:       (forth-help-names-extend-comp forth-help-load-path "")
  736:     (error "forth-help-load-path not specified")))
  737: 
  738: 
  739: ;(define-key forth-mode-map "\C-hf" 'forth-documentation)
  740: 
  741: (defun forth-documentation (function)
  742:   "Display the full documentation of FORTH word."
  743:   (interactive
  744:    (let ((fn (forth-function-called-at-point))
  745: 	 (enable-recursive-minibuffers t)	     
  746: 	 search-list
  747: 	 val)
  748:      (setq val (read-string (format "Describe forth word (default %s): " fn)))
  749:      (list (if (equal val "") fn val))))
  750:   (forth-get-doc (concat forth-search-command-prefix
  751: 			 (grep-regexp-quote (concat function " ("))
  752: 			 "[^)]*\-\-\" " (forth-help-names-extended)
  753: 			 forth-search-command-suffix))
  754:   (message "C-x C-m switches back to the forth interaction window"))
  755: 
  756: (defun forth-get-doc (command)
  757:   "Display the full documentation of command."
  758:   (let ((curwin (get-buffer-window (window-buffer)))
  759: 	reswin
  760: 	pointmax)
  761:     (with-output-to-temp-buffer forth-help-buffer
  762:       (progn
  763: 	(call-process "sh" nil forth-help-buffer t "-c" command)
  764: 	(setq reswin (get-buffer-window forth-help-buffer))))
  765:     (setq reswin (get-buffer-window forth-help-buffer))
  766:     (select-window reswin)
  767:     (save-excursion
  768:       (goto-char (setq pointmax (point-max)))
  769:       (insert "--------------------\n\n"))
  770:     (let (fd doc) 
  771:       (while (setq fd (forth-get-file-data pointmax))
  772: 	(setq doc (forth-get-doc-string fd))
  773: 	(save-excursion
  774: 	  (goto-char (point-max))
  775: 	  (insert (substring (car fd) (string-match "[^/]*$" (car fd)))
  776: 		  ":\n\n" doc "\n")))
  777:       (if (not doc)
  778: 	  (progn (goto-char (point-max)) (insert "Not found"))))
  779:     (select-window curwin)))
  780:   
  781: (defun forth-skip-error-lines ()
  782:   (let ((lines 0))
  783:     (save-excursion
  784:       (while (re-search-forward forth-grep-error-regexp nil t)
  785: 	(beginning-of-line)
  786: 	(forward-line 1)
  787: 	(setq lines (1+ lines))))
  788:     (forward-line lines)))
  789: 
  790: (defun forth-get-doc-string (fd)
  791:   "Find file (car fd) and extract documentation from line (nth 1 fd)."
  792:   (let (result)
  793:     (save-window-excursion
  794:       (find-file (car fd))
  795:       (goto-line (nth 1 fd))
  796:       (if (not (eq (nth 1 fd) (1+ (count-lines (point-min) (point)))))
  797: 	  (error "forth-get-doc-string: serious error"))
  798:       (if (not (re-search-backward "\n[\t ]*\n" nil t))
  799: 	  (goto-char (point-min))
  800: 	(goto-char (match-end 0)))
  801:       (let ((p (point)))
  802: 	(if (not (re-search-forward "\n[\t ]*\n" nil t))
  803: 	    (goto-char (point-max)))
  804: 	(setq result (buffer-substring p (point))))
  805:       (bury-buffer (current-buffer)))
  806:     result))
  807: 
  808: (defun forth-get-file-data (limit)
  809:   "Parse grep output and return '(filename line#) list. Return nil when
  810:  passing limit."
  811:   (forth-skip-error-lines)
  812:   (if (< (point) limit)
  813:       (let ((result (forth-get-file-data-cont limit)))
  814: 	(forward-line 1)
  815: 	(beginning-of-line)
  816: 	result)))
  817: 
  818: (defun forth-get-file-data-cont (limit)
  819:   (let (result)
  820:     (let ((p (point)))
  821:       (skip-chars-forward "^:")
  822:       (setq result (buffer-substring p (point))))
  823:     (if (< (point) limit)
  824: 	(let ((p (1+ (point))))
  825: 	  (forward-char 1)
  826: 	  (skip-chars-forward "^:")
  827: 	  (list result (string-to-int (buffer-substring p (point))))))))
  828: 
  829: (defun grep-regexp-quote (str)
  830:   (let ((i 0) (m 1) (res ""))
  831:     (while (/= m 0)
  832:       (setq m (string-to-char (substring str i)))
  833:       (if (/= m 0)
  834: 	  (progn
  835: 	    (setq i (1+ i))
  836: 	    (if (string-match (regexp-quote (char-to-string m))
  837: 			      ".*\\^$[]")
  838: 		(setq res (concat res "\\")))
  839: 	    (setq res (concat res (char-to-string m))))))
  840:     res))
  841: 
  842: 
  843: (define-key forth-mode-map "\C-x\C-e" 'forth-compile)
  844: (define-key forth-mode-map "\C-x\C-n" 'next-error)
  845: (require 'compile "compile")
  846: 
  847: (defvar forth-compile-command "gforth ")
  848: (defvar forth-compilation-window-percent-height 30)
  849: 
  850: (defun forth-compile (command)
  851:   (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))
  852:   (forth-split-1 "*compilation*")
  853:   (setq ctools-compile-command command)
  854:   (compile1 ctools-compile-command "No more errors"))
  855: 
  856: 

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