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120 lines
3.7 KiB
EmacsLisp
120 lines
3.7 KiB
EmacsLisp
;;; spook.el --- spook phrase utility for overloading the NSA line eater
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;; Maintainer: FSF
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;; Last-Modified: 05 Dec 1991
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;; Keywords: games
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;; Copyright (C) 1988 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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; Steve Strassmann (straz@media-lab.media.mit.edu) didn't write
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; this, and even if he did, he really didn't mean for you to use it
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; in an anarchistic way.
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; May 1987
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; To use this:
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; Make sure you have the variable SPOOK-PHRASES-FILE pointing to
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; a valid phrase file. Phrase files are in the same format as
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; zippy's yow.lines (ITS-style LINS format).
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; Strings are terminated by ascii 0 characters. Leading whitespace ignored.
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; Everything up to the first \000 is a comment.
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;
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; Just before sending mail, do M-x spook.
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; A number of phrases will be inserted into your buffer, to help
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; give your message that extra bit of attractiveness for automated
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; keyword scanners.
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;;; Code:
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; Variables
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(defvar spook-phrases-file (concat data-directory "spook.lines")
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"Keep your favorite phrases here.")
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(defvar spook-phrase-default-count 15
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"Default number of phrases to insert")
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(defvar spook-vector nil
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"Important phrases for NSA mail-watchers")
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; Randomize the seed in the random number generator.
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(random t)
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; Call this with M-x spook.
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(defun spook ()
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"Adds that special touch of class to your outgoing mail."
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(interactive)
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(if (null spook-vector)
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(setq spook-vector (snarf-spooks)))
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(shuffle-vector spook-vector)
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(let ((start (point)))
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(insert ?\n)
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(spook1 (min (- (length spook-vector) 1) spook-phrase-default-count))
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(insert ?\n)
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(fill-region-as-paragraph start (point) nil)))
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(defun spook1 (arg)
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"Inserts a spook phrase ARG times."
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(cond ((zerop arg) t)
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(t (insert (aref spook-vector arg))
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(insert " ")
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(spook1 (1- arg)))))
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(defun snarf-spooks ()
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"Reads in the phrase file"
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(message "Checking authorization...")
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(save-excursion
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(let ((buf (generate-new-buffer "*spook*"))
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(result '()))
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(set-buffer buf)
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(insert-file-contents (expand-file-name spook-phrases-file))
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(search-forward "\0")
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(while (progn (skip-chars-forward " \t\n\r\f") (not (eobp)))
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(let ((beg (point)))
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(search-forward "\0")
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(setq result (cons (buffer-substring beg (1- (point)))
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result))))
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(kill-buffer buf)
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(message "Checking authorization... Approved.")
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(setq spook-vector (apply 'vector result)))))
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(defun pick-random (n)
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"Returns a random number from 0 to N-1 inclusive."
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(% (logand 0777777 (random)) n))
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; Thanks to Ian G Batten <BattenIG@CS.BHAM.AC.UK>
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; [of the University of Birmingham Computer Science Department]
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; for the iterative version of this shuffle.
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;
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(defun shuffle-vector (vector)
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"Randomly permute the elements of VECTOR (all permutations equally likely)"
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(let ((i 0)
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j
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temp
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(len (length vector)))
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(while (< i len)
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(setq j (+ i (pick-random (- len i))))
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(setq temp (aref vector i))
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(aset vector i (aref vector j))
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(aset vector j temp)
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(setq i (1+ i))))
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vector)
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;;; spook.el ends here
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