;;; cookie1.el --- retrieve random phrases from fortune cookie files
-;; Copyright (C) 1993, 2001-2012 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 2001-2015 Free Software Foundation, Inc.
;; Author: Eric S. Raymond <esr@snark.thyrsus.com>
-;; Maintainer: FSF
+;; Maintainer: emacs-devel@gnu.org
;; Keywords: games, extensions
;; Created: Mon Mar 22 17:06:26 1993
;;; Commentary:
;; Support for random cookie fetches from phrase files, used for such
-;; critical applications as emulating Zippy the Pinhead and confounding
-;; the NSA Trunk Trawler.
+;; critical applications as confounding the NSA Trunk Trawler.
;;
;; The two entry points are `cookie' and `cookie-insert'. The helper
-;; function `shuffle-vector' may be of interest to programmers.
+;; function `cookie-shuffle-vector' may be of interest to programmers.
;;
;; The code expects phrase files to be in one of two formats:
;;
;; This code derives from Steve Strassmann's 1987 spook.el package, but
;; has been generalized so that it supports multiple simultaneous
;; cookie databases and fortune files. It is intended to be called
-;; from other packages such as yow.el and spook.el.
+;; from other packages such as spook.el.
;;; Code:
-; Randomize the seed in the random number generator.
-(random t)
+(defgroup cookie nil
+ "Random cookies from phrase files."
+ :prefix "cookie-"
+ :group 'games)
+
+(defcustom cookie-file nil
+ "Default phrase file for cookie functions."
+ :type '(choice (const nil) file)
+ :group 'cookie
+ :version "24.4")
(defconst cookie-delimiter "\n%%\n\\|\n%\n\\|\0"
"Delimiter used to separate cookie file entries.")
(defvar cookie-cache (make-vector 511 0)
"Cache of cookie files that have already been snarfed.")
+(defun cookie-check-file (file)
+ "Return either FILE or `cookie-file'.
+Signal an error if the result is nil or not readable."
+ (or (setq file (or file cookie-file)) (user-error "No phrase file specified"))
+ (or (file-readable-p file) (user-error "Cannot read file `%s'" file))
+ file)
+
;;;###autoload
-(defun cookie (phrase-file startmsg endmsg)
+(defun cookie (phrase-file &optional startmsg endmsg)
"Return a random phrase from PHRASE-FILE.
When the phrase file is read in, display STARTMSG at the beginning
-of load, ENDMSG at the end."
- (let ((cookie-vector (cookie-snarf phrase-file startmsg endmsg)))
- (shuffle-vector cookie-vector)
- (aref cookie-vector 0)))
+of load, ENDMSG at the end.
+Interactively, PHRASE-FILE defaults to `cookie-file', unless that
+is nil or a prefix argument is used."
+ (interactive (list (if (or current-prefix-arg (not cookie-file))
+ (read-file-name "Cookie file: " nil
+ cookie-file t cookie-file)
+ cookie-file) nil nil))
+ (setq phrase-file (cookie-check-file phrase-file))
+ (let ((cookie-vector (cookie-snarf phrase-file startmsg endmsg))
+ res)
+ (cookie-shuffle-vector cookie-vector)
+ (setq res (aref cookie-vector 0))
+ (if (called-interactively-p 'interactive)
+ (message "%s" res)
+ res)))
;;;###autoload
(defun cookie-insert (phrase-file &optional count startmsg endmsg)
"Insert random phrases from PHRASE-FILE; COUNT of them.
When the phrase file is read in, display STARTMSG at the beginning
of load, ENDMSG at the end."
+ (setq phrase-file (cookie-check-file phrase-file))
(let ((cookie-vector (cookie-snarf phrase-file startmsg endmsg)))
- (shuffle-vector cookie-vector)
+ (cookie-shuffle-vector cookie-vector)
(let ((start (point)))
(insert ?\n)
(cookie1 (min (- (length cookie-vector) 1) (or count 1)) cookie-vector)
(cookie1 (1- arg) cookie-vec))))
;;;###autoload
-(defun cookie-snarf (phrase-file startmsg endmsg)
+(defun cookie-snarf (phrase-file &optional startmsg endmsg)
"Reads in the PHRASE-FILE, returns it as a vector of strings.
Emit STARTMSG and ENDMSG before and after. Caches the result; second
and subsequent calls on the same file won't go to disk."
- (or (file-readable-p phrase-file)
- (error "Cannot read file `%s'" phrase-file))
+ (setq phrase-file (cookie-check-file phrase-file))
(let ((sym (intern-soft phrase-file cookie-cache)))
(and sym (not (equal (symbol-function sym)
(nth 5 (file-attributes phrase-file))))
(if sym
(symbol-value sym)
(setq sym (intern phrase-file cookie-cache))
- (message "%s" startmsg)
- (save-excursion
- (let ((buf (generate-new-buffer "*cookie*"))
- (result nil))
- (set-buffer buf)
- (fset sym (nth 5 (file-attributes phrase-file)))
+ (if startmsg (message "%s" startmsg))
+ (fset sym (nth 5 (file-attributes phrase-file)))
+ (let (result)
+ (with-temp-buffer
(insert-file-contents (expand-file-name phrase-file))
(re-search-forward cookie-delimiter)
(while (progn (skip-chars-forward " \t\n\r\f") (not (eobp)))
(let ((beg (point)))
(re-search-forward cookie-delimiter)
(setq result (cons (buffer-substring beg (match-beginning 0))
- result))))
- (kill-buffer buf)
- (message "%s" endmsg)
- (set sym (apply 'vector result)))))))
+ result)))))
+ (if endmsg (message "%s" endmsg))
+ (set sym (apply 'vector result))))))
-(defun read-cookie (prompt phrase-file startmsg endmsg &optional require-match)
+(defun cookie-read (prompt phrase-file &optional startmsg endmsg require-match)
"Prompt with PROMPT and read with completion among cookies in PHRASE-FILE.
STARTMSG and ENDMSG are passed along to `cookie-snarf'.
-Optional fifth arg REQUIRE-MATCH non-nil forces a matching cookie."
+Argument REQUIRE-MATCH non-nil forces a matching cookie."
+ (setq phrase-file (cookie-check-file phrase-file))
;; Make sure the cookies are in the cache.
(or (intern-soft phrase-file cookie-cache)
(cookie-snarf phrase-file startmsg endmsg))
(put sym 'completion-alist alist))))
nil require-match nil nil))
-; 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.
-;
-;;;###autoload
-(defun shuffle-vector (vector)
+(define-obsolete-function-alias 'read-cookie 'cookie-read "24.4")
+
+;; 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 cookie-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 (random (- len i))))
- (setq temp (aref vector i))
+ (let ((len (length vector))
+ j temp)
+ (dotimes (i len vector)
+ (setq j (+ i (random (- len i)))
+ temp (aref vector i))
(aset vector i (aref vector j))
- (aset vector j temp)
- (setq i (1+ i))))
- vector)
+ (aset vector j temp))))
+
+(define-obsolete-function-alias 'shuffle-vector 'cookie-shuffle-vector "24.4")
+
+
+(defun cookie-apropos (regexp phrase-file &optional display)
+ "Return a list of all entries matching REGEXP from PHRASE-FILE.
+Interactively, uses `read-regexp' to read REGEXP.
+Interactively, PHRASE-FILE defaults to `cookie-file', unless that
+is nil or a prefix argument is used.
+If called interactively, or if DISPLAY is non-nil, display a list of matches."
+ (interactive (list (read-regexp "Apropos phrase (regexp): ")
+ (if (or current-prefix-arg (not cookie-file))
+ (read-file-name "Cookie file: " nil
+ cookie-file t cookie-file)
+ cookie-file) t))
+ (setq phrase-file (cookie-check-file phrase-file))
+ ;; Make sure phrases are loaded.
+ (cookie phrase-file)
+ (let* ((case-fold-search t)
+ (cookie-table-symbol (intern phrase-file cookie-cache))
+ (string-table (symbol-value cookie-table-symbol))
+ (matches nil))
+ (and (dotimes (i (length string-table) matches)
+ (and (string-match-p regexp (aref string-table i))
+ (setq matches (cons (aref string-table i) matches))))
+ (setq matches (sort matches 'string-lessp)))
+ (and display
+ (if matches
+ (let ((l matches))
+ (with-output-to-temp-buffer "*Cookie Apropos*"
+ (while l
+ (princ (car l))
+ (setq l (cdr l))
+ (and l (princ "\n\n")))
+ (help-print-return-message)))
+ (message "No matches found.")))
+ matches))
+
+
+(declare-function doctor-ret-or-read "doctor" (arg))
+
+(defun cookie-doctor (phrase-file)
+ "Feed cookie phrases from PHRASE-FILE to the doctor.
+Interactively, PHRASE-FILE defaults to `cookie-file', unless that
+is nil or a prefix argument is used."
+ (interactive (list (if (or current-prefix-arg (not cookie-file))
+ (read-file-name "Cookie file: " nil
+ cookie-file t cookie-file)
+ cookie-file)))
+ (setq phrase-file (cookie-check-file phrase-file))
+ (doctor) ; start the psychotherapy
+ (message "")
+ (switch-to-buffer "*doctor*")
+ (sit-for 0)
+ (while (not (input-pending-p))
+ (insert (cookie phrase-file))
+ (sit-for 0)
+ (doctor-ret-or-read 1)
+ (doctor-ret-or-read 1)))
+
(provide 'cookie1)