File:  [gforth] / gforth / gforth.el
Revision 1.15: download - view: text, annotated - select for diffs
Wed Oct 11 19:39:34 1995 UTC (25 years, 7 months ago) by anton
Branches: MAIN
CVS tags: HEAD
Now gforth.fi is a nonrelocatable image containing all of startup.fs etc.
savesystem now saves `included-files', too (so require does not start from
 scratch)
added/fixed stack effect and wordset documentation for many words in kernal.fs
some reformatting in kernal.fs
fixed some wordset info in primitives
added strsignal

    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 1.15 1995/10/11 19:39:34 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 code ;code does> begin do ?do +do -do u+do u-do while if ?dup-if ?dup-not-if else case 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:   " ; end-code ;code does> until repeat while +loop loop -loop s+loop else then endif again endcase end-struct [then] [else] [endif]"
   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 code "
   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~" 'forth-remove-tracers)
   77: (define-key forth-mode-map "\e\C-m" 'forth-send-paragraph)
   78: (define-key forth-mode-map "\eo" 'forth-send-buffer)
   79: (define-key forth-mode-map "\C-x\C-m" 'forth-split)
   80: (define-key forth-mode-map "\e " 'forth-reload)
   81: (define-key forth-mode-map "\t" 'forth-indent-command)
   82: (define-key forth-mode-map "\C-m" 'reindent-then-newline-and-indent)
   83: (define-key forth-mode-map "\M-q" 'forth-fill-paragraph)
   84: (define-key forth-mode-map "\e." 'forth-find-tag)
   85: 
   86: (load "etags.el")
   87: 
   88: (defun forth-find-tag (tagname &optional next-p regexp-p)
   89:   (interactive (find-tag-interactive "Find tag: "))
   90:   (switch-to-buffer
   91:    (find-tag-noselect (concat " " tagname " ") next-p regexp-p)))
   92: 
   93: (defvar forth-mode-syntax-table nil
   94:   "Syntax table in use in Forth-mode buffers.")
   95: 
   96: (if (not forth-mode-syntax-table)
   97:     (progn
   98:       (setq forth-mode-syntax-table (make-syntax-table))
   99:       (let ((char 0))
  100: 	(while (< char ?!)
  101: 	  (modify-syntax-entry char " " forth-mode-syntax-table)
  102: 	  (setq char (1+ char)))
  103: 	(while (< char 256)
  104: 	  (modify-syntax-entry char "w" forth-mode-syntax-table)
  105: 	  (setq char (1+ char))))
  106:       (modify-syntax-entry ?\" "\"" forth-mode-syntax-table)
  107:       (modify-syntax-entry ?\\ "<" forth-mode-syntax-table)
  108:       (modify-syntax-entry ?\n ">" forth-mode-syntax-table)
  109:       ))
  110: ;I do not define '(' and ')' as comment delimiters, because emacs
  111: ;only supports one comment syntax (and a hack to accomodate C++); I
  112: ;use '\' for natural language comments and '(' for formal comments
  113: ;like stack comments, so for me it's better to have emacs treat '\'
  114: ;comments as comments. If you want it different, make the appropriate
  115: ;changes (best in your .emacs file).
  116: ;
  117: ;Hmm, the C++ hack could be used to support both comment syntaxes: we
  118: ;can have different comment styles, if both comments start with the
  119: ;same character. we could use ' ' as first and '(' and '\' as second
  120: ;character. However this would fail for G\ comments.
  121: 
  122: (defconst forth-indent-level 4
  123:   "Indentation of Forth statements.")
  124: 
  125: (defun forth-mode-variables ()
  126:   (set-syntax-table forth-mode-syntax-table)
  127:   (setq local-abbrev-table forth-mode-abbrev-table)
  128:   (make-local-variable 'paragraph-start)
  129:   (setq paragraph-start (concat "^$\\|" page-delimiter))
  130:   (make-local-variable 'paragraph-separate)
  131:   (setq paragraph-separate paragraph-start)
  132:   (make-local-variable 'indent-line-function)
  133:   (setq indent-line-function 'forth-indent-line)
  134: ;  (make-local-variable 'require-final-newline)
  135: ;  (setq require-final-newline t)
  136:   (make-local-variable 'comment-start)
  137:   (setq comment-start "\\ ")
  138:   ;(make-local-variable 'comment-end)
  139:   ;(setq comment-end " )")
  140:   (make-local-variable 'comment-column)
  141:   (setq comment-column 40)
  142:   (make-local-variable 'comment-start-skip)
  143:   (setq comment-start-skip "\\ ")
  144:   (make-local-variable 'comment-indent-hook)
  145:   (setq comment-indent-hook 'forth-comment-indent)
  146:   (make-local-variable 'parse-sexp-ignore-comments)
  147:   (setq parse-sexp-ignore-comments t))
  148:   
  149: ;;;###autoload
  150: (defun forth-mode ()
  151:   "
  152: Major mode for editing Forth code. Tab indents for Forth code. Comments
  153: are delimited with \\ and newline. Paragraphs are separated by blank lines
  154: only. Delete converts tabs to spaces as it moves back.
  155: \\{forth-mode-map}
  156:  Forth-split
  157:     Positions the current buffer on top and a forth-interaction window
  158:     below. The window size is controlled by the forth-percent-height
  159:     variable (see below).
  160:  Forth-reload
  161:     Reloads the forth library and restarts the forth process.
  162:  Forth-send-buffer
  163:     Sends the current buffer, in text representation, as input to the
  164:     forth process.
  165:  Forth-send-paragraph
  166:     Sends the previous or the current paragraph to the forth-process.
  167:     Note that the cursor only need to be with in the paragraph to be sent.
  168: forth-documentation
  169:     Search for documentation of forward adjacent to cursor. Note! To use
  170:     this mode you have to add a line, to your .emacs file, defining the
  171:     directories to search through for documentation files (se variable
  172:     forth-help-load-path below) e.g. (setq forth-help-load-path '(nil)).
  173: 
  174: Variables controlling interaction and startup
  175:  forth-percent-height
  176:     Tells split how high to make the edit portion, in percent of the
  177:     current screen height.
  178:  forth-program-name
  179:     Tells the library which program name to execute in the interation
  180:     window.
  181: 
  182: Variables controlling indentation style:
  183:  forth-positives
  184:     A string containing all words which causes the indent-level of the
  185:     following line to be incremented.
  186:     OBS! Each word must be surronded by spaces.
  187:  forth-negatives
  188:     A string containing all words which causes the indentation of the
  189:     current line to be decremented, if the word begin the line. These
  190:     words also has a cancelling effect on the indent-level of the
  191:     following line, independent of position.
  192:     OBS! Each word must be surronded by spaces.
  193:  forth-zeroes
  194:     A string containing all words which causes the indentation of the
  195:     current line to go to zero, if the word begin the line.
  196:     OBS! Each word must be surronded by spaces.
  197:  forth-indent-level
  198:     Indentation increment/decrement of Forth statements.
  199: 
  200:  Note! A word which decrements the indentation of the current line, may
  201:     also be mentioned in forth-positives to cause the indentation to
  202:     resume the previous level.
  203: 
  204: Variables controling documentation search
  205:  forth-help-load-path
  206:     List of directories to search through to find *.doc
  207:     (forth-help-file-suffix) files. Nil means current default directory.
  208:     The specified directories must contain at least one .doc file. If it
  209:     does not and you still want the load-path to scan that directory, create
  210:     an empty file dummy.doc.
  211:  forth-help-file-suffix
  212:     The file names to search for in each directory specified by
  213:     forth-help-load-path. Defaulted to '*.doc'. 
  214: "
  215:   (interactive)
  216:   (kill-all-local-variables)
  217:   (use-local-map forth-mode-map)
  218:   (setq mode-name "Forth")
  219:   (setq major-mode 'forth-mode)
  220:   (forth-mode-variables)
  221: ;  (if (not (forth-process-running-p))
  222: ;      (run-forth forth-program-name))
  223:   (run-hooks 'forth-mode-hook))
  224: 
  225: (setq forth-mode-hook
  226:       '(lambda () 
  227: 	 (make-local-variable 'compile-command)
  228: 	 (setq compile-command "gforth ")))
  229: 
  230: (defun forth-fill-paragraph () 
  231:   "Fill comments (starting with '\'; do not fill code (block style
  232: programmers who tend to fill code won't use emacs anyway:-)."
  233:   ; Currently only comments at the start of the line are filled.
  234:   ; Something like lisp-fill-paragraph may be better.  We cannot use
  235:   ; fill-paragraph, because it removes the \ from the first comment
  236:   ; line. Therefore we have to look for the first line of the comment
  237:   ; and use fill-region.
  238:   (interactive)
  239:   (save-excursion
  240:     (beginning-of-line)
  241:     (while (and
  242: 	     (= (forward-line -1) 0)
  243: 	     (looking-at "[ \t]*\\\\g?[ \t]+")))
  244:     (if (not (looking-at "[ \t]*\\\\g?[ \t]+"))
  245: 	(forward-line 1))
  246:     (let ((from (point))
  247: 	  (to (save-excursion (forward-paragraph) (point))))
  248:       (if (looking-at "[ \t]*\\\\g?[ \t]+")
  249: 	  (progn (goto-char (match-end 0))
  250: 		 (set-fill-prefix)
  251: 		 (fill-region from to nil))))))
  252: 
  253: (defun forth-comment-indent ()
  254:   (save-excursion
  255:     (beginning-of-line)
  256:     (if (looking-at ":[ \t]*")
  257: 	(progn
  258: 	  (end-of-line)
  259: 	  (skip-chars-backward " \t\n")
  260: 	  (1+ (current-column)))
  261:       comment-column)))
  262: 
  263: (defun forth-current-indentation ()
  264:   (save-excursion
  265:     (beginning-of-line)
  266:     (back-to-indentation)
  267:     (current-column)))
  268: 
  269: (defun forth-delete-indentation ()
  270:   (let ((b nil) (m nil))
  271:     (save-excursion
  272:       (beginning-of-line)
  273:       (setq b (point))
  274:       (back-to-indentation)
  275:       (setq m (point)))
  276:     (delete-region b m)))
  277: 
  278: (defun forth-indent-line (&optional flag)
  279:   "Correct indentation of the current Forth line."
  280:   (let ((x (forth-calculate-indent)))
  281:     (forth-indent-to x)))
  282:   
  283: (defun forth-indent-command ()
  284:   (interactive)
  285:   (forth-indent-line t))
  286: 
  287: (defun forth-indent-to (x)
  288:   (let ((p nil))
  289:     (setq p (- (current-column) (forth-current-indentation)))
  290:     (forth-delete-indentation)
  291:     (beginning-of-line)
  292:     (indent-to x)
  293:     (if (> p 0) (forward-char p))))
  294: 
  295: ;;Calculate indent
  296: (defun forth-calculate-indent ()
  297:   (let ((w1 nil) (indent 0) (centre 0))
  298:     (save-excursion
  299:       (beginning-of-line)
  300:       (skip-chars-backward " \t\n")
  301:       (beginning-of-line)
  302:       (back-to-indentation)
  303:       (setq indent (current-column))
  304:       (setq centre indent)
  305:       (setq indent (+ indent (forth-sum-line-indentation))))
  306:     (save-excursion
  307:       (beginning-of-line)
  308:       (back-to-indentation)
  309:       (let ((p (point)))
  310: 	(skip-chars-forward "^ \t\n")
  311: 	(setq w1 (buffer-substring p (point)))))
  312:     (if (> (- indent centre) forth-indent-level)
  313: 	(setq indent (+ centre forth-indent-level)))
  314:     (if (> (- centre indent) forth-indent-level)
  315: 	(setq indent (- centre forth-indent-level)))
  316:     (if (< indent 0) (setq indent 0))
  317:     (setq indent (- indent
  318: 		    (if (string-match 
  319: 			 (regexp-quote (concat " " w1 " "))
  320: 			 forth-negatives)
  321: 			forth-indent-level 0)))
  322:     (if (string-match (regexp-quote (concat " " w1 " ")) forth-zeroes)
  323: 	(setq indent 0))
  324:     indent))
  325: 
  326: (defun forth-sum-line-indentation ()
  327:   "Add upp the positive and negative weights of all words on the current line."
  328:   (let ((b (point)) (e nil) (sum 0) (w nil) (t1 nil) (t2 nil) (first t))
  329:     (end-of-line) (setq e (point))
  330:     (goto-char b)
  331:     (while (< (point) e)
  332:       (setq w (forth-next-word))
  333:       (setq t1 (string-match (regexp-quote (concat " " w " "))
  334: 			     forth-positives))
  335:       (setq t2 (string-match (regexp-quote (concat " " w " "))
  336: 			     forth-negatives))
  337:       (if t1
  338: 	  (setq sum (+ sum forth-indent-level)))
  339:       (if (and t2 (not first))
  340: 	  (setq sum (- sum forth-indent-level)))
  341:       (skip-chars-forward " \t")
  342:       (setq first nil))
  343:     sum))
  344: 
  345: 
  346: (defun forth-next-word ()
  347:   "Return the next forth-word. Skip anything that the forth-word takes from
  348: the input stream (comments, arguments, etc.)"
  349: ;actually, it would be better to use commands based on the
  350: ;syntax-table or comment-start etc.
  351:   (let ((w1 nil))
  352:     (while (not w1)
  353:       (skip-chars-forward " \t\n")
  354:       (let ((p (point)))
  355: 	(skip-chars-forward "^ \t\n")
  356: 	(setq w1 (buffer-substring p (point))))
  357:       (cond ((string-match "\"" w1)
  358: 	     (progn
  359: 	       (skip-chars-forward "^\"\n")
  360: 	       (forward-char)))
  361: 	    ((string-match "\\\\" w1)
  362: 	     (progn
  363: 	       (end-of-line)
  364: 	       ))
  365: 	    ((or (equal "(" w1) (equal ".(" w1))
  366: 	     (progn
  367: 	       (skip-chars-forward "^)\n")
  368: 	       (forward-char)))
  369: 	    ((string-match (regexp-quote (concat " " w1 " ")) forth-prefixes)
  370: 	     (progn (skip-chars-forward " \t\n")
  371: 		    (skip-chars-forward "^ \t\n")))
  372: 	    (t nil)))
  373:     w1))
  374:       
  375: 
  376: ;; Forth commands
  377: 
  378: (defun forth-remove-tracers ()
  379:   "Remove tracers of the form `~~ '. Queries the user for each occurrence."
  380:   (interactive)
  381:   (query-replace "~~ " ""))
  382: 
  383: (defvar forth-program-name "gforth"
  384:   "*Program invoked by the `run-forth' command.")
  385: 
  386: (defvar forth-band-name nil
  387:   "*Band loaded by the `run-forth' command.")
  388: 
  389: (defvar forth-program-arguments nil
  390:   "*Arguments passed to the Forth program by the `run-forth' command.")
  391: 
  392: (defun run-forth (command-line)
  393:   "Run an inferior Forth process. Output goes to the buffer `*forth*'.
  394: With argument, asks for a command line. Split up screen and run forth 
  395: in the lower portion. The current-buffer when called will stay in the
  396: upper portion of the screen, and all other windows are deleted.
  397: Call run-forth again to make the *forth* buffer appear in the lower
  398: part of the screen."
  399:   (interactive
  400:    (list (let ((default
  401: 		 (or forth-process-command-line
  402: 		     (forth-default-command-line))))
  403: 	   (if current-prefix-arg
  404: 	       (read-string "Run Forth: " default)
  405: 	       default))))
  406:   (setq forth-process-command-line command-line)
  407:   (forth-start-process command-line)
  408:   (forth-split)
  409:   (forth-set-runlight forth-runlight:input))
  410: 
  411: (defun reset-forth ()
  412:   "Reset the Forth process."
  413:   (interactive)
  414:   (let ((process (get-process forth-program-name)))
  415:     (cond ((or (not process)
  416: 	       (not (eq (process-status process) 'run))
  417: 	       (yes-or-no-p
  418: "The Forth process is running, are you SURE you want to reset it? "))
  419: 	   (message "Resetting Forth process...")
  420: 	   (forth-reload)
  421: 	   (message "Resetting Forth process...done")))))
  422: 
  423: (defun forth-default-command-line ()
  424:   (concat forth-program-name
  425: 	  (if forth-program-arguments
  426: 	      (concat " " forth-program-arguments)
  427: 	      "")))
  428: 
  429: ;;;; Internal Variables
  430: 
  431: (defvar forth-process-command-line nil
  432:   "Command used to start the most recent Forth process.")
  433: 
  434: (defvar forth-previous-send ""
  435:   "Most recent expression transmitted to the Forth process.")
  436: 
  437: (defvar forth-process-filter-queue '()
  438:   "Queue used to synchronize filter actions properly.")
  439: 
  440: (defvar forth-prompt "ok"
  441:   "The current forth prompt string.")
  442: 
  443: (defvar forth-start-hook nil
  444:   "If non-nil, a procedure to call when the Forth process is started.
  445: When called, the current buffer will be the Forth process-buffer.")
  446: 
  447: (defvar forth-signal-death-message nil
  448:   "If non-nil, causes a message to be generated when the Forth process dies.")
  449: 
  450: (defvar forth-percent-height 50
  451:   "Tells run-forth how high the upper window should be in percent.")
  452: 
  453: (defconst forth-runlight:input ?I
  454:   "The character displayed when the Forth process is waiting for input.")
  455: 
  456: (defvar forth-mode-string ""
  457:   "String displayed in the mode line when the Forth process is running.")
  458: 
  459: ;;;; Evaluation Commands
  460: 
  461: (defun forth-send-string (&rest strings)
  462:   "Send the string arguments to the Forth process.
  463: The strings are concatenated and terminated by a newline."
  464:   (cond ((forth-process-running-p)
  465: 	 (forth-send-string-1 strings))
  466: 	((yes-or-no-p "The Forth process has died.  Reset it? ")
  467: 	 (reset-forth)
  468: 	 (goto-char (point-max))
  469: 	 (forth-send-string-1 strings))))
  470: 
  471: (defun forth-send-string-1 (strings)
  472:   (let ((string (apply 'concat strings)))
  473:     (forth-send-string-2 string)))
  474: 
  475: (defun forth-send-string-2 (string)
  476:   (let ((process (get-process forth-program-name)))
  477:     (if (not (eq (current-buffer) (get-buffer forth-program-name)))
  478: 	(progn
  479: 	 (forth-process-filter-output string)
  480: 	 (forth-process-filter:finish)))
  481:     (send-string process (concat string "\n"))
  482:     (if (eq (current-buffer) (process-buffer process))
  483: 	(set-marker (process-mark process) (point)))))
  484: 
  485: 
  486: (defun forth-send-region (start end)
  487:   "Send the current region to the Forth process.
  488: The region is sent terminated by a newline."
  489:   (interactive "r")
  490:   (let ((process (get-process forth-program-name)))
  491:     (if (and process (eq (current-buffer) (process-buffer process)))
  492: 	(progn (goto-char end)
  493: 	       (set-marker (process-mark process) end))))
  494:   (forth-send-string "\n" (buffer-substring start end) "\n"))
  495: 
  496: (defun forth-end-of-paragraph ()
  497:   (if (looking-at "[\t\n ]+") (skip-chars-backward  "\t\n "))
  498:   (if (not (re-search-forward "\n[ \t]*\n" nil t))
  499:       (goto-char (point-max))))
  500: 
  501: (defun forth-send-paragraph ()
  502:   "Send the current or the previous paragraph to the Forth process"
  503:   (interactive)
  504:   (let (end)
  505:     (save-excursion
  506:       (forth-end-of-paragraph)
  507:       (skip-chars-backward  "\t\n ")
  508:       (setq end (point))
  509:       (if (re-search-backward "\n[ \t]*\n" nil t)
  510: 	  (setq start (point))
  511: 	(goto-char (point-min)))
  512:       (skip-chars-forward  "\t\n ")
  513:       (forth-send-region (point) end))))
  514:   
  515: (defun forth-send-buffer ()
  516:   "Send the current buffer to the Forth process."
  517:   (interactive)
  518:   (if (eq (current-buffer) (forth-process-buffer))
  519:       (error "Not allowed to send this buffer's contents to Forth"))
  520:   (forth-send-region (point-min) (point-max)))
  521: 
  522: 
  523: ;;;; Basic Process Control
  524: 
  525: (defun forth-start-process (command-line)
  526:   (let ((buffer (get-buffer-create "*forth*")))
  527:     (let ((process (get-buffer-process buffer)))
  528:       (save-excursion
  529: 	(set-buffer buffer)
  530: 	(progn (if process (delete-process process))
  531: 	       (goto-char (point-max))
  532: 	       (setq mode-line-process '(": %s"))
  533: 	       (add-to-global-mode-string 'forth-mode-string)
  534: 	       (setq process
  535: 		     (apply 'start-process
  536: 			    (cons forth-program-name
  537: 				  (cons buffer
  538: 					(forth-parse-command-line
  539: 					 command-line)))))
  540: 	       (set-marker (process-mark process) (point-max))
  541: 	       (forth-process-filter-initialize t)
  542: 	       (forth-modeline-initialize)
  543: 	       (set-process-sentinel process 'forth-process-sentinel)
  544: 	       (set-process-filter process 'forth-process-filter)
  545: 	       (run-hooks 'forth-start-hook)))
  546:     buffer)))
  547: 
  548: (defun forth-parse-command-line (string)
  549:   (setq string (substitute-in-file-name string))
  550:   (let ((start 0)
  551: 	(result '()))
  552:     (while start
  553:       (let ((index (string-match "[ \t]" string start)))
  554: 	(setq start
  555: 	      (cond ((not index)
  556: 		     (setq result
  557: 			   (cons (substring string start)
  558: 				 result))
  559: 		     nil)
  560: 		    ((= index start)
  561: 		     (string-match "[^ \t]" string start))
  562: 		    (t
  563: 		     (setq result
  564: 			   (cons (substring string start index)
  565: 				 result))
  566: 		     (1+ index))))))
  567:     (nreverse result)))
  568: 
  569: 
  570: (defun forth-process-running-p ()
  571:   "True iff there is a Forth process whose status is `run'."
  572:   (let ((process (get-process forth-program-name)))
  573:     (and process
  574: 	 (eq (process-status process) 'run))))
  575: 
  576: (defun forth-process-buffer ()
  577:   (let ((process (get-process forth-program-name)))
  578:     (and process (process-buffer process))))
  579: 
  580: ;;;; Process Filter
  581: 
  582: (defun forth-process-sentinel (proc reason)
  583:   (let ((inhibit-quit nil))
  584:     (forth-process-filter-initialize (eq reason 'run))
  585:     (if (eq reason 'run)
  586: 	(forth-modeline-initialize)
  587: 	(setq forth-mode-string "")))
  588:   (if (and (not (memq reason '(run stop)))
  589: 	   forth-signal-death-message)
  590:       (progn (beep)
  591: 	     (message
  592: "The Forth process has died!  Do M-x reset-forth to restart it"))))
  593: 
  594: (defun forth-process-filter-initialize (running-p)
  595:   (setq forth-process-filter-queue (cons '() '()))
  596:   (setq forth-prompt "ok"))
  597: 
  598: 
  599: (defun forth-process-filter (proc string)
  600:   (forth-process-filter-output string)
  601:   (forth-process-filter:finish))
  602: 
  603: (defun forth-process-filter:enqueue (action)
  604:   (let ((next (cons action '())))
  605:     (if (cdr forth-process-filter-queue)
  606: 	(setcdr (cdr forth-process-filter-queue) next)
  607: 	(setcar forth-process-filter-queue next))
  608:     (setcdr forth-process-filter-queue next)))
  609: 
  610: (defun forth-process-filter:finish ()
  611:   (while (car forth-process-filter-queue)
  612:     (let ((next (car forth-process-filter-queue)))
  613:       (setcar forth-process-filter-queue (cdr next))
  614:       (if (not (cdr next))
  615: 	  (setcdr forth-process-filter-queue '()))
  616:       (apply (car (car next)) (cdr (car next))))))
  617: 
  618: ;;;; Process Filter Output
  619: 
  620: (defun forth-process-filter-output (&rest args)
  621:   (if (not (and args
  622: 		(null (cdr args))
  623: 		(stringp (car args))
  624: 		(string-equal "" (car args))))
  625:       (forth-process-filter:enqueue
  626:        (cons 'forth-process-filter-output-1 args))))
  627: 
  628: (defun forth-process-filter-output-1 (&rest args)
  629:   (save-excursion
  630:     (forth-goto-output-point)
  631:     (apply 'insert-before-markers args)))
  632: 
  633: (defun forth-guarantee-newlines (n)
  634:   (save-excursion
  635:     (forth-goto-output-point)
  636:     (let ((stop nil))
  637:       (while (and (not stop)
  638: 		  (bolp))
  639: 	(setq n (1- n))
  640: 	(if (bobp)
  641: 	    (setq stop t)
  642: 	  (backward-char))))
  643:     (forth-goto-output-point)
  644:     (while (> n 0)
  645:       (insert-before-markers ?\n)
  646:       (setq n (1- n)))))
  647: 
  648: (defun forth-goto-output-point ()
  649:   (let ((process (get-process forth-program-name)))
  650:     (set-buffer (process-buffer process))
  651:     (goto-char (process-mark process))))
  652: 
  653: (defun forth-modeline-initialize ()
  654:   (setq forth-mode-string "  "))
  655: 
  656: (defun forth-set-runlight (runlight)
  657:   (aset forth-mode-string 0 runlight)
  658:   (forth-modeline-redisplay))
  659: 
  660: (defun forth-modeline-redisplay ()
  661:   (save-excursion (set-buffer (other-buffer)))
  662:   (set-buffer-modified-p (buffer-modified-p))
  663:   (sit-for 0))
  664: 
  665: ;;;; Process Filter Operations
  666: 
  667: (defun add-to-global-mode-string (x)
  668:   (cond ((null global-mode-string)
  669: 	 (setq global-mode-string (list "" x " ")))
  670: 	((not (memq x global-mode-string))
  671: 	 (setq global-mode-string
  672: 	       (cons ""
  673: 		     (cons x
  674: 			   (cons " "
  675: 				 (if (equal "" (car global-mode-string))
  676: 				     (cdr global-mode-string)
  677: 				     global-mode-string))))))))
  678: 
  679: 
  680: ;; Misc
  681: 
  682: (setq auto-mode-alist (append auto-mode-alist
  683: 				'(("\\.fs$" . forth-mode))))
  684: 
  685: (defun forth-split ()
  686:   (interactive)
  687:   (forth-split-1 "*forth*"))
  688: 
  689: (defun forth-split-1 (buffer)
  690:   (if (not (eq (window-buffer) (get-buffer buffer)))
  691:       (progn
  692: 	(delete-other-windows)
  693: 	(split-window-vertically
  694: 	 (/ (* (screen-height) forth-percent-height) 100))
  695: 	(other-window 1)
  696: 	(switch-to-buffer buffer)
  697: 	(goto-char (point-max))
  698: 	(other-window 1))))
  699:     
  700: (defun forth-reload ()
  701:   (interactive)
  702:   (let ((process (get-process forth-program-name)))
  703:     (if process (kill-process process t)))
  704:   (sleep-for-millisecs 100)
  705:   (forth-mode))
  706: 
  707: 
  708: ;; Special section for forth-help
  709: 
  710: (defvar forth-help-buffer "*Forth-help*"
  711:   "Buffer used to display the requested documentation.")
  712: 
  713: (defvar forth-help-load-path nil
  714:   "List of directories to search through to find *.doc
  715:  (forth-help-file-suffix) files. Nil means current default directory.
  716:  The specified directories must contain at least one .doc file. If it
  717:  does not and you still want the load-path to scan that directory, create
  718:  an empty file dummy.doc.")
  719: 
  720: (defvar forth-help-file-suffix "*.doc"
  721:   "The file names to search for in each directory.")
  722: 
  723: (setq forth-search-command-prefix "grep -n \"^    [^(]* ")
  724: (defvar forth-search-command-suffix "/dev/null")
  725: (defvar forth-grep-error-regexp ": No such file or directory")
  726: 
  727: (defun forth-function-called-at-point ()
  728:   "Return the space delimited word a point."
  729:   (save-excursion
  730:     (save-restriction
  731:       (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
  732:       (skip-chars-backward "^ \t\n" (point-min))
  733:       (if (looking-at "[ \t\n]")
  734: 	  (forward-char 1))
  735:       (let (obj (p (point)))
  736: 	(skip-chars-forward "^ \t\n")
  737: 	(buffer-substring p (point))))))
  738: 
  739: (defun forth-help-names-extend-comp (path-list result)
  740:   (cond ((null path-list) result)
  741: 	((null (car path-list))
  742: 	 (forth-help-names-extend-comp (cdr path-list) 
  743: 	       (concat result forth-help-file-suffix " ")))
  744: 	(t (forth-help-names-extend-comp
  745: 	    (cdr path-list) (concat result
  746: 				    (expand-file-name (car path-list)) "/"
  747: 				    forth-help-file-suffix " ")))))
  748: 
  749: (defun forth-help-names-extended ()
  750:   (if forth-help-load-path
  751:       (forth-help-names-extend-comp forth-help-load-path "")
  752:     (error "forth-help-load-path not specified")))
  753: 
  754: 
  755: ;(define-key forth-mode-map "\C-hf" 'forth-documentation)
  756: 
  757: (defun forth-documentation (function)
  758:   "Display the full documentation of FORTH word."
  759:   (interactive
  760:    (let ((fn (forth-function-called-at-point))
  761: 	 (enable-recursive-minibuffers t)	     
  762: 	 search-list
  763: 	 val)
  764:      (setq val (read-string (format "Describe forth word (default %s): " fn)))
  765:      (list (if (equal val "") fn val))))
  766:   (forth-get-doc (concat forth-search-command-prefix
  767: 			 (grep-regexp-quote (concat function " ("))
  768: 			 "[^)]*\-\-\" " (forth-help-names-extended)
  769: 			 forth-search-command-suffix))
  770:   (message "C-x C-m switches back to the forth interaction window"))
  771: 
  772: (defun forth-get-doc (command)
  773:   "Display the full documentation of command."
  774:   (let ((curwin (get-buffer-window (window-buffer)))
  775: 	reswin
  776: 	pointmax)
  777:     (with-output-to-temp-buffer forth-help-buffer
  778:       (progn
  779: 	(call-process "sh" nil forth-help-buffer t "-c" command)
  780: 	(setq reswin (get-buffer-window forth-help-buffer))))
  781:     (setq reswin (get-buffer-window forth-help-buffer))
  782:     (select-window reswin)
  783:     (save-excursion
  784:       (goto-char (setq pointmax (point-max)))
  785:       (insert "--------------------\n\n"))
  786:     (let (fd doc) 
  787:       (while (setq fd (forth-get-file-data pointmax))
  788: 	(setq doc (forth-get-doc-string fd))
  789: 	(save-excursion
  790: 	  (goto-char (point-max))
  791: 	  (insert (substring (car fd) (string-match "[^/]*$" (car fd)))
  792: 		  ":\n\n" doc "\n")))
  793:       (if (not doc)
  794: 	  (progn (goto-char (point-max)) (insert "Not found"))))
  795:     (select-window curwin)))
  796:   
  797: (defun forth-skip-error-lines ()
  798:   (let ((lines 0))
  799:     (save-excursion
  800:       (while (re-search-forward forth-grep-error-regexp nil t)
  801: 	(beginning-of-line)
  802: 	(forward-line 1)
  803: 	(setq lines (1+ lines))))
  804:     (forward-line lines)))
  805: 
  806: (defun forth-get-doc-string (fd)
  807:   "Find file (car fd) and extract documentation from line (nth 1 fd)."
  808:   (let (result)
  809:     (save-window-excursion
  810:       (find-file (car fd))
  811:       (goto-line (nth 1 fd))
  812:       (if (not (eq (nth 1 fd) (1+ (count-lines (point-min) (point)))))
  813: 	  (error "forth-get-doc-string: serious error"))
  814:       (if (not (re-search-backward "\n[\t ]*\n" nil t))
  815: 	  (goto-char (point-min))
  816: 	(goto-char (match-end 0)))
  817:       (let ((p (point)))
  818: 	(if (not (re-search-forward "\n[\t ]*\n" nil t))
  819: 	    (goto-char (point-max)))
  820: 	(setq result (buffer-substring p (point))))
  821:       (bury-buffer (current-buffer)))
  822:     result))
  823: 
  824: (defun forth-get-file-data (limit)
  825:   "Parse grep output and return '(filename line#) list. Return nil when
  826:  passing limit."
  827:   (forth-skip-error-lines)
  828:   (if (< (point) limit)
  829:       (let ((result (forth-get-file-data-cont limit)))
  830: 	(forward-line 1)
  831: 	(beginning-of-line)
  832: 	result)))
  833: 
  834: (defun forth-get-file-data-cont (limit)
  835:   (let (result)
  836:     (let ((p (point)))
  837:       (skip-chars-forward "^:")
  838:       (setq result (buffer-substring p (point))))
  839:     (if (< (point) limit)
  840: 	(let ((p (1+ (point))))
  841: 	  (forward-char 1)
  842: 	  (skip-chars-forward "^:")
  843: 	  (list result (string-to-int (buffer-substring p (point))))))))
  844: 
  845: (defun grep-regexp-quote (str)
  846:   (let ((i 0) (m 1) (res ""))
  847:     (while (/= m 0)
  848:       (setq m (string-to-char (substring str i)))
  849:       (if (/= m 0)
  850: 	  (progn
  851: 	    (setq i (1+ i))
  852: 	    (if (string-match (regexp-quote (char-to-string m))
  853: 			      ".*\\^$[]")
  854: 		(setq res (concat res "\\")))
  855: 	    (setq res (concat res (char-to-string m))))))
  856:     res))
  857: 
  858: 
  859: (define-key forth-mode-map "\C-x\C-e" 'compile)
  860: (define-key forth-mode-map "\C-x\C-n" 'next-error)
  861: (require 'compile "compile")
  862: 
  863: (defvar forth-compile-command "gforth ")
  864: ;(defvar forth-compilation-window-percent-height 30)
  865: 
  866: (defun forth-compile (command)
  867:   (interactive (list (setq forth-compile-command (read-string "Compile command: " forth-compile-command))))
  868:   (forth-split-1 "*compilation*")
  869:   (setq ctools-compile-command command)
  870:   (compile1 ctools-compile-command "No more errors"))
  871: 
  872: 
  873: ;;; Forth menu
  874: ;;; Mikael Karlsson <qramika@eras70.ericsson.se>
  875: 
  876: (cond ((string-match "XEmacs\\|Lucid" emacs-version)
  877:        (require 'func-menu)
  878: 
  879:   (defconst fume-function-name-regexp-forth
  880:    "^\\(:\\)[ \t]+\\([^ \t]*\\)"
  881:    "Expression to get word definitions in Forth.")
  882: 
  883:   (setq fume-function-name-regexp-alist
  884:       (append '((forth-mode . fume-function-name-regexp-forth) 
  885:              ) fume-function-name-regexp-alist))
  886: 
  887:   ;; Find next forth word in the buffer
  888:   (defun fume-find-next-forth-function-name (buffer)
  889:     "Searches for the next forth word in BUFFER."
  890:     (set-buffer buffer)
  891:     (if (re-search-forward fume-function-name-regexp nil t)
  892:       (let ((beg (match-beginning 2))
  893:             (end (match-end 2)))
  894:         (cons (buffer-substring beg end) beg))))
  895: 
  896:   (setq fume-find-function-name-method-alist
  897:   (append '((forth-mode    . fume-find-next-forth-function-name))))
  898: 
  899:   ))
  900: ;;; End Forth menu
  901: 
  902: ;;; File folding of forth-files
  903: ;;; uses outline
  904: ;;; Toggle activation with M-x fold-f (when editing a forth-file) 
  905: ;;; Use f9 to expand, f10 to hide, Or the menubar in xemacs
  906: ;;;
  907: ;;; Works most of the times but loses sync with the cursor occasionally 
  908: ;;; Could be improved by also folding on comments
  909: 
  910: (require 'outline)
  911: 
  912: ;;(define-key outline-minor-mode-map 'f9 'show-entry)
  913: ;;(define-key outline-minor-mode-map 'f10 'hide-entry)
  914: 
  915: (defun fold-f  ()
  916:    (interactive)
  917:    (add-hook 'outline-minor-mode-hook 'hide-body)
  918: 
  919:    ; outline mode header start, i.e. find word definitions
  920:    (setq  outline-regexp  "^\\(:\\)[ \t]+\\([^ \t]*\\)")
  921: 
  922:    (outline-minor-mode)
  923: )
  924: ;;; end file folding
  925: 
  926: ;;; func-menu is a package that scans your source file for function definitions
  927: ;;; and makes a menubar entry that lets you jump to any particular function
  928: ;;; definition by selecting it from the menu.  The following code turns this on
  929: ;;; for all of the recognized languages.  Scanning the buffer takes some time,
  930: ;;; but not much.
  931: ;;;
  932: (cond ((string-match "XEmacs\\|Lucid" emacs-version)
  933:        (require 'func-menu)
  934: ;;       (define-key global-map 'f8 'function-menu)
  935:        (add-hook 'find-fible-hooks 'fume-add-menubar-entry)
  936:        (define-key global-map "\C-cg" 'fume-prompt-function-goto)
  937:        (define-key global-map '(shift button3) 'mouse-function-menu)
  938:        ))

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