(random t)
(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 (phrase-file 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)))
(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."
(let ((cookie-vector (cookie-snarf phrase-file startmsg endmsg)))
(shuffle-vector cookie-vector)
(let ((start (point)))
(insert ?\n)
(cookie1 (min (- (length cookie-vector) 1) (or count 1)) cookie-vector)
(insert ?\n)
(fill-region-as-paragraph start (point) nil))))
(defun cookie1 (arg cookie-vec)
"Inserts a cookie phrase ARG times."
(cond ((zerop arg) t)
(t (insert (aref cookie-vec arg))
(insert " ")
(cookie1 (1- arg) cookie-vec))))
(defun cookie-snarf (phrase-file 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."
(let ((sym (intern-soft phrase-file cookie-cache)))
(and sym (not (equal (symbol-function sym)
(nth 5 (file-attributes phrase-file))))
(yes-or-no-p (concat phrase-file
" has changed. Read new contents? "))
(setq sym nil))
(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)))
(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)))))))
(defun read-cookie (prompt phrase-file startmsg endmsg &optional 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."
(or (intern-soft phrase-file cookie-cache)
(cookie-snarf phrase-file startmsg endmsg))
(completing-read prompt
(let ((sym (intern phrase-file cookie-cache)))
(or (get sym 'completion-alist)
(let* ((alist nil)
(vec (cookie-snarf phrase-file
startmsg endmsg))
(i (length vec)))
(while (> (setq i (1- i)) 0)
(setq alist (cons (list (aref vec i)) alist)))
(put sym 'completion-alist alist))))
nil require-match nil nil))
(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 (random (- len i))))
(setq temp (aref vector i))
(aset vector i (aref vector j))
(aset vector j temp)
(setq i (1+ i))))
vector)
(provide 'cookie1)