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- ;; Spook phrase utility
- ;; Copyright (C) 1988 Free Software Foundation
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs 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
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; 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.
-
-
- ; Steve Strassmann (straz@media-lab.media.mit.edu) didn't write
- ; this, and even if he did, he really didn't mean for you to use it
- ; in an anarchistic way.
- ; May 1987
-
- ; To use this:
- ; Make sure you have the variable SPOOK-PHRASES-FILE pointing to
- ; a valid phrase file. Phrase files are in the same format as
- ; zippy's yow.lines (ITS-style LINS format).
- ; Strings are terminated by ascii 0 characters. Leading whitespace ignored.
- ; Everything up to the first \000 is a comment.
- ;
- ; Just before sending mail, do M-x spook.
- ; A number of phrases will be inserted into your buffer, to help
- ; give your message that extra bit of attractiveness for automated
- ; keyword scanners.
-
- ; Variables
- (defvar spook-phrases-file (concat exec-directory "spook.lines")
- "Keep your favorite phrases here.")
-
- (defvar spook-phrase-default-count 15
- "Default number of phrases to insert")
-
- (defvar spook-vector nil
- "Important phrases for NSA mail-watchers")
-
- ; Randomize the seed in the random number generator.
- (random t)
-
- ; Call this with M-x spook.
- (defun spook ()
- "Adds that special touch of class to your outgoing mail."
- (interactive)
- (if (null spook-vector)
- (setq spook-vector (snarf-spooks)))
- (shuffle-vector spook-vector)
- (let ((start (point)))
- (insert ?\n)
- (spook1 (min (- (length spook-vector) 1) spook-phrase-default-count))
- (insert ?\n)
- (fill-region-as-paragraph start (point) nil)))
-
- (defun spook1 (arg)
- "Inserts a spook phrase ARG times."
- (cond ((zerop arg) t)
- (t (insert (aref spook-vector arg))
- (insert " ")
- (spook1 (1- arg)))))
-
- (defun snarf-spooks ()
- "Reads in the phrase file"
- (message "Checking authorization...")
- (save-excursion
- (let ((buf (generate-new-buffer "*spook*"))
- (result '()))
- (set-buffer buf)
- (insert-file-contents (expand-file-name spook-phrases-file))
- (search-forward "\0")
- (while (progn (skip-chars-forward " \t\n\r\f") (not (eobp)))
- (let ((beg (point)))
- (search-forward "\0")
- (setq result (cons (buffer-substring beg (1- (point)))
- result))))
- (kill-buffer buf)
- (message "Checking authorization... Approved.")
- (setq spook-vector (apply 'vector result)))))
-
- (defun pick-random (n)
- "Returns a random number from 0 to N-1 inclusive."
- (% (logand 0777777 (random)) n))
-
- ; Thanks to Ian G Batten <BattenIG@CS.BHAM.AC.UK>
- ; [of the University of Birmingham Computer Science Department]
- ; for the iterative version of this shuffle.
- ;
- (defun shuffle-vector (vector)
- "Randomly permute the elements of VECTOR (all permutations equally likely)"
- (let ((i 0)
- j
- temp
- (len (length vector)))
- (while (< i len)
- (setq j (+ i (pick-random (- len i))))
- (setq temp (aref vector i))
- (aset vector i (aref vector j))
- (aset vector j temp)
- (setq i (1+ i))))
- vector)
-