misc/rubydb2x.el

   1 (require 'gud)
   2 (provide 'rubydb)
   3
   4 ;; ======================================================================
   5 ;; rubydb functions
   6
   7 ;;; History of argument lists passed to rubydb.
   8 (defvar gud-rubydb-history nil)
   9
  10 (defun gud-rubydb-massage-args (file args)
  11   (cons "-I" (cons "." (cons "-r" (cons "debug" (cons file args))))))
  12
  13 ;; There's no guarantee that Emacs will hand the filter the entire
  14 ;; marker at once; it could be broken up across several strings.  We
  15 ;; might even receive a big chunk with several markers in it.  If we
  16 ;; receive a chunk of text which looks like it might contain the
  17 ;; beginning of a marker, we save it here between calls to the
  18 ;; filter.
  19 (defvar gud-rubydb-marker-acc "")
  20
  21 (defun gud-rubydb-marker-filter (string)
  22   (save-match-data
  23     (setq gud-marker-acc (concat gud-marker-acc string))
  24     (let ((output ""))
  25
  26       ;; Process all the complete markers in this chunk.
  27       (while (string-match "\032\032\\([^:\n]*\\):\\([0-9]*\\):.*\n"
  28                            gud-marker-acc)
  29         (setq
  30
  31          ;; Extract the frame position from the marker.
  32          gud-last-frame
  33          (cons (substring gud-marker-acc (match-beginning 1) (match-end 1))
  34                (string-to-int (substring gud-marker-acc
  35                                          (match-beginning 2)
  36                                          (match-end 2))))
  37
  38          ;; Append any text before the marker to the output we're going
  39          ;; to return - we don't include the marker in this text.
  40          output (concat output
  41                         (substring gud-marker-acc 0 (match-beginning 0)))
  42
  43          ;; Set the accumulator to the remaining text.
  44          gud-marker-acc (substring gud-marker-acc (match-end 0))))
  45
  46       ;; Does the remaining text look like it might end with the
  47       ;; beginning of another marker?  If it does, then keep it in
  48       ;; gud-marker-acc until we receive the rest of it.  Since we
  49       ;; know the full marker regexp above failed, it's pretty simple to
  50       ;; test for marker starts.
  51       (if (string-match "\032.*\\'" gud-marker-acc)
  52           (progn
  53             ;; Everything before the potential marker start can be output.
  54             (setq output (concat output (substring gud-marker-acc
  55                                                    0 (match-beginning 0))))
  56
  57             ;; Everything after, we save, to combine with later input.
  58             (setq gud-marker-acc
  59                   (substring gud-marker-acc (match-beginning 0))))
  60
  61         (setq output (concat output gud-marker-acc)
  62               gud-marker-acc ""))
  63
  64       output)))
  65
  66 (defun gud-rubydb-find-file (f)
  67   (find-file-noselect f))
  68
  69 (defvar rubydb-command-name "ruby"
  70   "File name for executing ruby.")
  71
  72 ;;;###autoload
  73 (defun rubydb (command-line)
  74   "Run rubydb on program FILE in buffer *gud-FILE*.
  75 The directory containing FILE becomes the initial working directory
  76 and source-file directory for your debugger."
  77   (interactive
  78    (list (read-from-minibuffer "Run rubydb (like this): "
  79                                (if (consp gud-rubydb-history)
  80                                    (car gud-rubydb-history)
  81                                  (concat rubydb-command-name " "))
  82                                nil nil
  83                                '(gud-rubydb-history . 1))))
  84
  85   (gud-overload-functions '((gud-massage-args . gud-rubydb-massage-args)
  86                             (gud-marker-filter . gud-rubydb-marker-filter)
  87                             (gud-find-file . gud-rubydb-find-file)
  88                             ))
  89   (gud-common-init command-line)
  90
  91   (gud-def gud-break  "b %l"         "\C-b" "Set breakpoint at current line.")
  92 ;  (gud-def gud-remove "clear %l"     "\C-d" "Remove breakpoint at current line")
  93   (gud-def gud-step   "s"            "\C-s" "Step one source line with display.")
  94   (gud-def gud-next   "n"            "\C-n" "Step one line (skip functions).")
  95   (gud-def gud-cont   "c"            "\C-r" "Continue with display.")
  96   (gud-def gud-finish "finish"       "\C-f" "Finish executing current function.")
  97   (gud-def gud-up     "up %p"        "<" "Up N stack frames (numeric arg).")
  98   (gud-def gud-down   "down %p"      ">" "Down N stack frames (numeric arg).")
  99   (gud-def gud-print  "p %e"         "\C-p" "Evaluate ruby expression at point.")
 100
 101   (setq comint-prompt-regexp "^(rdb:-) ")
 102   (setq paragraph-start comint-prompt-regexp)
 103   (run-hooks 'rubydb-mode-hook)
 104   )