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;;; FILE
;;; rexx-debug.el V1.0
;;; Copyright (C) 1993 by Anders Lindgren.
;;; This file is NOT part of GNU Emacs (yet).
;;; REXX-debug 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
;;; 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.
;;; Anders Lindgren,
;;; To use this program, call "rexx-debug", enter a filename,
;;; or press return if you would like to debug the current file.
;;; Enter the arguments to the rexx program and press return.
;;; The output from the program and debuginformation will be
;;; shown in "*rexx-<name>*".
;;; Very simple REXX source level debugger. Currently, the only thing
;;; it reallt does is reads the debug info and places the arrow
;;; on the correct line.
;;; To use this program, the rexx script must be run in interactive
;;; debug mode. This is controlled by the '?' trace flag. You can
;;; for example place this line in the beginning of the script:
;;; trace ?r
;;; 93-01-11 ALi Start of codeing based on comint-gdb
;;; 93-01-15 Works very well, thank you!
;;; 93-03-16 rxdb-command-name removed as local function.
(require 'comint)
(provide 'rexx-debug)
(defvar rxdb-lineno-regexp "^ +[0-9]+ +\\*\\-\\* "
"A regexp to recognize a linenumber in the rexx debugger output stream.")
(defvar rxdb-prompt-pattern "^>\\+> "
"A regexp to recognize the rexx debugger prompt.")
(defvar rxdb-command-name "rx"
"Pathname for REXX interpreter.")
(defvar rxdb-mode-map nil
"Keymap for rexx-debug-mode.")
(if rxdb-mode-map
(setq rxdb-mode-map (full-copy-sparse-keymap comint-mode-map))
(define-key rxdb-mode-map "\C-l" 'rxdb-refresh))
(defun rxdb-mode ()
"Major mode for interacting with an inferior rexx process.
rxdb-command-name contains the name of the REXX interpretator.
Default is \"RX\", which is used by ARexx.
Customisation: Entry to this mode runs the hooks comint-mode-hook and
rxdb-mode-hook (in that order).
For example:
(setq rxdb-mode-hook '(lambda ()
(setq rxdb-command-name \"/usr/local/bin/rexx\")
(define-local-key \"key\" 'favorite-command)
will set the command so it can be used in many UNIX environments."
(setq major-mode 'rxdb-mode)
(setq mode-name "Inferior REXX")
(setq mode-line-process '(": %s"))
(use-local-map rxdb-mode-map)
(setq comint-prompt-regexp rxdb-prompt-pattern)
(make-local-variable 'rxdb-last-frame)
(setq rxdb-last-frame nil)
(make-local-variable 'rxdb-last-frame-displayed-p)
(setq rxdb-last-frame-displayed-p t)
(make-local-variable 'rxdb-delete-prompt-marker)
(setq rxdb-delete-prompt-marker nil)
(run-hooks 'rxdb-mode-hook))
(defun rexx-debug (path args)
"Run a rexx program FILE in buffer *rexx-FILE*.
The directory containing FILE becomes the initial working directory
and source-file directory.
\(Type \\[describe-mode] in the process buffer for a list of commands.)"
(interactive "FDebug file (return for current buffer): \nsArguments:")
(setq path (expand-file-name path))
(let* ((file (file-name-nondirectory path))
(rxdb-buffer (concat "*rexx-" file "*"))
(rxdb-window (get-buffer-window rxdb-buffer)))
(if rxdb-window
(select-window rxdb-window)
(switch-to-buffer rxdb-buffer))
(if (comint-check-proc rxdb-buffer) nil
(setq default-directory (file-name-directory path))
(or (bolp) (newline))
(insert "Current directory is " default-directory "\n")
(make-comint (concat "rexx-" file) rxdb-command-name nil
(concat file " " args))
(set-process-filter (get-buffer-process (current-buffer)) 'rxdb-filter)
(set-process-sentinel (get-buffer-process (current-buffer))
(rxdb-set-buffer path)))
(defun rxdb-set-buffer (&optional path)
(cond ((eq major-mode 'rxdb-mode)
(setq current-rxdb-buffer (current-buffer))
(if path
(setq current-rxdb-file path)))))
;; This function is responsible for inserting output from the rexx
;; debugger into the buffer. It records the linenumber for the
;; placement of the arrow.
(defun rxdb-filter (proc string)
(let ((inhibit-quit t))
(rxdb-filter-accumulate-marker proc string)))
(defun rxdb-filter-accumulate-marker (proc string)
(let ((end t))
(while end
(setq end (string-match "\012" string))
(if end
(if (string-match rxdb-lineno-regexp string)
(setq rxdb-last-frame
(string-to-int (substring string 0
"\\*\\-\\*" string 1))))
(setq rxdb-last-frame-displayed-p nil)))
(rxdb-filter-insert proc (substring string 0 (1+ end)))
(setq string (substring string (1+ end))))))
(if (equal string "") nil
(rxdb-filter-insert proc string))))
(defun rxdb-filter-insert (proc string)
(let ((moving (= (point) (process-mark proc)))
(output-after-point (< (point) (process-mark proc)))
(old-buffer (current-buffer))
(set-buffer (process-buffer proc))
;; Insert the text, moving the process-marker.
(goto-char (process-mark proc))
(setq start (point))
(insert string)
(set-marker (process-mark proc) (point))
;; Check for new linenumber.
;; Don't display the specified file
;; unless (1) point is at or after the position where output appears
;; and (2) this buffer is on the screen.
(or output-after-point
(not (get-buffer-window (current-buffer))))
;; Display a file only when a new linenumber appears.
(set-buffer old-buffer))
(if moving (goto-char (process-mark proc)))))
(defun rxdb-sentinel (proc msg)
(cond ((null (buffer-name (process-buffer proc)))
;; buffer killed
;; Stop displaying an arrow in a source file.
(setq overlay-arrow-position nil)
(set-process-buffer proc nil))
((memq (process-status proc) '(signal exit))
;; Stop displaying an arrow in a source file.
(setq overlay-arrow-position nil)
;; Fix the mode line.
(setq mode-line-process
(concat ": "
(symbol-name (process-status proc))))
(let* ((obuf (current-buffer)))
;; save-excursion isn't the right thing if
;; process-buffer is current-buffer
;; Write something in *compilation* and hack its mode line,
(set-buffer (process-buffer proc))
;; Force mode line redisplay soon
(set-buffer-modified-p (buffer-modified-p))
(if (eobp)
(insert ?\n mode-name " " msg)
(goto-char (point-max))
(insert ?\n mode-name " " msg)))
;; If buffer and mode line will show that the process
;; is dead, we can delete it now. Otherwise it
;; will stay around until M-x list-processes.
(delete-process proc))
;; Restore old buffer, but don't restore old point
;; if obuf is the rxdb buffer.
(set-buffer obuf))))))
(defun rxdb-refresh ()
"Fix up a possibly garbled display, and redraw the arrow."
(defun rxdb-display-frame (&optional nodisplay noauto)
"Display the last line executed in another window."
(and rxdb-last-frame (not nodisplay)
(or (not rxdb-last-frame-displayed-p) (not noauto))
(progn (rxdb-display-line current-rxdb-file rxdb-last-frame)
(setq rxdb-last-frame-displayed-p t))))
;; Make sure the file named TRUE-FILE is in a buffer that appears on the screen
;; and that its line LINE is visible.
;; Put the overlay-arrow on the line LINE in that buffer.
(defun rxdb-display-line (true-file line)
(let* ((buffer (find-file-noselect true-file))
(window (display-buffer buffer t))
(set-buffer buffer)
(goto-line line)
(setq pos (point))
(setq overlay-arrow-string "=>")
(or overlay-arrow-position
(setq overlay-arrow-position (make-marker)))
(set-marker overlay-arrow-position (point) (current-buffer)))
(cond ((or (< pos (point-min)) (> pos (point-max)))
(goto-char pos))))
(set-window-point window overlay-arrow-position)))
(defun rxdb-call (command)
"Invoke rexx debug COMMAND displaying source in other window."
(goto-char (point-max))
(setq rxdb-delete-prompt-marker (point-marker))
(send-string (get-buffer-process current-rxdb-buffer)
(concat command "\n")))
(defun rxdb-maybe-delete-prompt ()
(if (and rxdb-delete-prompt-marker
(> (point-max) (marker-position rxdb-delete-prompt-marker)))
(let (start)
(goto-char rxdb-delete-prompt-marker)
(setq start (point))
(delete-region (point) start)
(setq rxdb-delete-prompt-marker nil))))
(defvar rxdb-commands nil
"List of strings or functions used by send-rxdb-command.
It is for customization by you.")
(defun send-rxdb-command (arg)
"This command reads the core-address where the cursor is positioned. It
then inserts this ADDR at the end of the rxdb buffer. A numeric arg
selects the ARG'th member COMMAND of the list rxdb-commands. If
COMMAND is a string, (format COMMAND ADDR) is inserted, otherwise
(funcall COMMAND ADDR) is inserted. eg. \"p (rtx)%s->fld[0].rtint\"
is a possible string to be a member of rxdb-commands. "
(interactive "P")
(let (comm addr)
(if arg (setq comm (nth arg rxdb-commands)))
(setq addr (rxdb-read-address))
(if (eq (current-buffer) current-rxdb-buffer)
(set-mark (point)))
(cond (comm
(setq comm
(if (stringp comm) (format comm addr) (funcall comm addr))))
(t (setq comm addr)))
(switch-to-buffer current-rxdb-buffer)
(goto-char (point-max))
(insert-string comm)))
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