1 | ;;; dribble.lisp |
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2 | ;;; |
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3 | ;;; Copyright (C) 2004 Peter Graves |
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4 | ;;; $Id: dribble.lisp 15569 2022-03-19 12:50:18Z mevenson $ |
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5 | ;;; |
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6 | ;;; This program is free software; you can redistribute it and/or |
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7 | ;;; modify it under the terms of the GNU General Public License |
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8 | ;;; as published by the Free Software Foundation; either version 2 |
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9 | ;;; of the License, or (at your option) any later version. |
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10 | ;;; |
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11 | ;;; This program is distributed in the hope that it will be useful, |
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12 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | ;;; GNU General Public License for more details. |
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15 | ;;; |
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16 | ;;; You should have received a copy of the GNU General Public License |
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17 | ;;; along with this program; if not, write to the Free Software |
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18 | ;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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19 | ;;; |
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20 | ;;; As a special exception, the copyright holders of this library give you |
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21 | ;;; permission to link this library with independent modules to produce an |
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22 | ;;; executable, regardless of the license terms of these independent |
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23 | ;;; modules, and to copy and distribute the resulting executable under |
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24 | ;;; terms of your choice, provided that you also meet, for each linked |
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25 | ;;; independent module, the terms and conditions of the license of that |
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26 | ;;; module. An independent module is a module which is not derived from |
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27 | ;;; or based on this library. If you modify this library, you may extend |
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28 | ;;; this exception to your version of the library, but you are not |
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29 | ;;; obligated to do so. If you do not wish to do so, delete this |
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30 | ;;; exception statement from your version. |
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31 | |
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32 | |
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33 | ;;; Each time we start dribbling to a new stream, we put it in |
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34 | ;;; *DRIBBLE-STREAM*, and push a list of *DRIBBLE-STREAM*, *STANDARD-INPUT*, |
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35 | ;;; *STANDARD-OUTPUT* and *ERROR-OUTPUT* in *PREVIOUS-DRIBBLE-STREAMS*. |
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36 | ;;; *STANDARD-OUTPUT* and *ERROR-OUTPUT* is changed to a broadcast stream that |
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37 | ;;; broadcasts to *DRIBBLE-STREAM* and to the old values of the variables. |
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38 | ;;; *STANDARD-INPUT* is changed to an echo stream that echos input from the old |
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39 | ;;; value of standard input to *DRIBBLE-STREAM*. |
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40 | ;;; |
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41 | ;;; When dribble is called with no arguments, *DRIBBLE-STREAM* is closed, |
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42 | ;;; and the values of *DRIBBLE-STREAM*, *STANDARD-INPUT*, and |
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43 | ;;; *STANDARD-OUTPUT* are popped from *PREVIOUS-DRIBBLE-STREAMS*. |
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44 | |
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45 | ;;; From SBCL. |
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46 | |
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47 | (in-package "SYSTEM") |
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48 | |
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49 | (defvar *previous-dribble-streams* nil) |
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50 | (defvar *dribble-stream* nil) |
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51 | |
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52 | (defun dribble (&optional pathname &key (if-exists :append)) |
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53 | "With a file name as an argument, dribble opens the file and sends a |
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54 | record of further I/O to that file. Without an argument, it closes |
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55 | the dribble file, and quits logging." |
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56 | (cond (pathname |
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57 | (let* ((new-dribble-stream |
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58 | (open pathname |
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59 | :direction :output |
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60 | :if-exists if-exists |
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61 | :if-does-not-exist :create)) |
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62 | (new-standard-output |
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63 | (make-broadcast-stream *standard-output* new-dribble-stream)) |
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64 | (new-error-output |
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65 | (make-broadcast-stream *error-output* new-dribble-stream)) |
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66 | (new-standard-input |
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67 | (make-echo-stream *standard-input* new-dribble-stream))) |
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68 | (push (list *dribble-stream* *standard-input* *standard-output* |
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69 | *error-output*) |
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70 | *previous-dribble-streams*) |
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71 | (setf *dribble-stream* new-dribble-stream) |
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72 | (setf *standard-input* new-standard-input) |
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73 | (setf *standard-output* new-standard-output) |
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74 | (setf *error-output* new-error-output) |
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75 | ;; Starting a new internal REPL for dribbling |
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76 | (loop do |
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77 | (format t "~a> " (package-name *package*)) |
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78 | (with-simple-restart (abort "Error detected in dribbling") |
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79 | (handler-case |
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80 | (let ((input (read *standard-input*))) |
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81 | (print (eval input) *standard-output*) |
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82 | (terpri) |
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83 | (when (equal input '(dribble)) |
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84 | (return))) |
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85 | (error (c) |
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86 | (format *error-output* "~a~%" c) |
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87 | (error c))))))) |
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88 | ((null *dribble-stream*) |
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89 | (error "Not currently dribbling.")) |
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90 | (t |
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91 | (let ((old-streams (pop *previous-dribble-streams*))) |
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92 | (close *dribble-stream*) |
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93 | (setf *dribble-stream* (first old-streams)) |
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94 | (setf *standard-input* (second old-streams)) |
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95 | (setf *standard-output* (third old-streams)) |
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96 | (setf *error-output* (fourth old-streams))))) |
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97 | (values)) |
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