--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lisp/tl/filename.el	Mon Aug 13 08:47:35 2007 +0200
@@ -0,0 +1,142 @@
+;;; filename.el --- file name filter
+
+;; Copyright (C) 1996 MORIOKA Tomohiko
+
+;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Version: $Id: filename.el,v 1.1 1996/12/22 00:37:04 steve Exp $
+;; Keywords: string, file name
+
+;; This file is part of tl (Tiny Library).
+
+;; This program 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 2, or (at
+;; your option) any later version.
+
+;; This program 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, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Code:
+
+(require 'tl-list)
+(require 'tl-str)
+
+
+;;; @ variables
+;;;
+
+(defvar filename-limit-length 21)
+
+(defvar filename-replacement-alist
+  (list
+   (cons (string-to-char-list " \t") "_")
+   (cons (string-to-char-list (expand-char-ranges "!-*,/:;<>?[-^`{-~")) "_")
+   '(filename-control-p . "")
+   ))
+
+(defvar filename-filters
+  (nconc
+   (and (file-installed-p "kakasi" exec-path)
+	'(filename-japanese-to-roman-string)
+	)
+   '(filename-special-filter
+     filename-eliminate-top-low-lines
+     filename-canonicalize-low-lines
+     filename-maybe-truncate-by-size
+     filename-eliminate-bottom-low-lines
+     )))
+
+
+;;; @ filters
+;;;
+
+(defun filename-japanese-to-roman-string (str)
+  (save-excursion
+    (set-buffer (get-buffer-create " *temp kakasi*"))
+    (erase-buffer)
+    (insert str)
+    (call-process-region (point-min)(point-max) "kakasi" t t t
+			 "-Ha" "-Ka" "-Ja" "-Ea" "-ka")
+    (buffer-string)
+    ))
+
+(defun filename-control-p (character)
+  (let ((code (char-int character)))
+    (or (< code 32)(= code 127))
+    ))
+
+(defun filename-special-filter (string)
+  (let (dest
+	(i 0)
+	(len (length string))
+	(b 0)
+	)
+    (while (< i len)
+      (let* ((chr (sref string i))
+	     (ret (ASSOC chr filename-replacement-alist
+			 :test (function
+				(lambda (chr key)
+				  (if (functionp key)
+				      (funcall key chr)
+				    (memq chr key)
+				    )
+				  ))))
+	     )
+	(if ret
+	    (setq dest (concat dest (substring string b i)(cdr ret))
+		  i (+ i (char-length chr))
+		  b i)
+	  (setq i (+ i (char-length chr)))
+	  )))
+    (concat dest (substring string b))
+    ))
+
+(defun filename-eliminate-top-low-lines (string)
+  (if (string-match "^_+" string)
+      (substring string (match-end 0))
+    string))
+
+(defun filename-canonicalize-low-lines (string)
+  (let (dest)
+    (while (string-match "__+" string)
+      (setq dest (concat dest (substring string 0 (1+ (match-beginning 0)))))
+      (setq string (substring string (match-end 0)))
+      )
+    (concat dest string)
+    ))
+
+(defun filename-maybe-truncate-by-size (string)
+  (if (and (> (length string) filename-limit-length)
+	   (string-match "_" string filename-limit-length)
+	   )
+      (substring string 0 (match-beginning 0))
+    string))
+
+(defun filename-eliminate-bottom-low-lines (string)
+  (if (string-match "_+$" string)
+      (substring string 0 (match-beginning 0))
+    string))
+
+
+;;; @ interface
+;;;
+
+(defun replace-as-filename (string)
+  "Return safety filename from STRING. [filename.el]"
+  (poly-funcall filename-filters string)
+  )
+
+
+;;; @ end
+;;;
+
+(provide 'filename)
+
+;;; filename.el ends here