From: morioka <morioka>
Date: Thu, 17 Sep 1998 03:33:33 +0000 (+0000)
Subject: New modules.
X-Git-Tag: chao-1_9-199811302358~2
X-Git-Url: http://git.chise.org/gitweb/?a=commitdiff_plain;h=1ffab510ea148f8505e5069ad9834245eb227854;p=elisp%2Fflim.git

New modules.
---

diff --git a/mel-b-ccl.el b/mel-b-ccl.el
new file mode 100644
index 0000000..f0390e8
--- /dev/null
+++ b/mel-b-ccl.el
@@ -0,0 +1,20 @@
+(require 'emu)
+(require 'mel-b-el)
+
+(unless (and (boundp 'ccl-encoder-eof-block-is-broken)
+	     ccl-encoder-eof-block-is-broken)
+  (require 'mel-ccl)
+  (defalias 'base64-encode-string 'base64-ccl-encode-string)
+  (defalias 'base64-encode-region 'base64-ccl-encode-region)
+  (defalias 'base64-insert-encoded-file 'base64-ccl-insert-encoded-file)
+  )
+
+(unless (and (boundp 'ccl-decoder-eof-block-is-broken)
+	     ccl-decoder-eof-block-is-broken)
+  (require 'mel-ccl)
+  (defalias 'base64-decode-string 'base64-ccl-decode-string)
+  (defalias 'base64-decode-region 'base64-ccl-decode-region)
+  (defalias 'base64-write-decoded-region 'base64-ccl-write-decoded-region)
+  )
+
+(provide 'mel-b-ccl)
diff --git a/mel-b-el.el b/mel-b-el.el
new file mode 100644
index 0000000..02dd713
--- /dev/null
+++ b/mel-b-el.el
@@ -0,0 +1,361 @@
+;;; mel-b-el.el: Base64 encoder/decoder for GNU Emacs
+
+;; Copyright (C) 1992,1995,1996,1997,1998 Free Software Foundation, Inc.
+
+;; Author: ENAMI Tsugutomo <enami@sys.ptg.sony.co.jp>
+;;         MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Created: 1995/6/24
+;; Keywords: MIME, Base64
+
+;; This file is part of MEL (MIME Encoding 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 'emu)
+(require 'mime-def)
+
+
+;;; @ variables
+;;;
+
+(defgroup base64 nil
+  "Base64 encoder/decoder"
+  :group 'mime)
+
+(defcustom base64-external-encoder '("mmencode")
+  "*list of base64 encoder program name and its arguments."
+  :group 'base64
+  :type '(cons (file :tag "Command")(repeat :tag "Arguments" string)))
+
+(defcustom base64-external-decoder '("mmencode" "-u")
+  "*list of base64 decoder program name and its arguments."
+  :group 'base64
+  :type '(cons (file :tag "Command")(repeat :tag "Arguments" string)))
+
+(defcustom base64-external-decoder-option-to-specify-file '("-o")
+  "*list of options of base64 decoder program to specify file."
+  :group 'base64
+  :type '(repeat :tag "Arguments" string))
+
+(defcustom base64-internal-encoding-limit 1000
+  "*limit size to use internal base64 encoder.
+If size of input to encode is larger than this limit,
+external encoder is called."
+  :group 'base64
+  :type '(choice (const :tag "Always use internal encoder" nil)
+		 (integer :tag "Size")))
+
+(defcustom base64-internal-decoding-limit 70000
+  "*limit size to use internal base64 decoder.
+If size of input to decode is larger than this limit,
+external decoder is called."
+  :group 'base64
+  :type '(choice (const :tag "Always use internal decoder" nil)
+		 (integer :tag "Size")))
+
+
+;;; @ internal base64 encoder
+;;;	based on base64 decoder by Enami Tsugutomo
+
+(defconst base64-characters
+  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/")
+
+(defmacro base64-num-to-char (n)
+  `(aref base64-characters ,n))
+
+(defun base64-encode-1 (pack)
+  (let ((a (car pack))
+	(b (nth 1 pack))
+	(c (nth 2 pack)))
+    (concat
+     (char-to-string (base64-num-to-char (ash a -2)))
+     (if b
+	 (concat
+	  (char-to-string
+	   (base64-num-to-char (logior (ash (logand a 3) 4) (ash b -4))))
+	  (if c
+	      (concat
+	       (char-to-string
+		(base64-num-to-char (logior (ash (logand b 15) 2) (ash c -6))))
+	       (char-to-string (base64-num-to-char (logand c 63)))
+	       )
+	    (concat (char-to-string
+		     (base64-num-to-char (ash (logand b 15) 2))) "=")
+	    ))
+       (concat (char-to-string
+		(base64-num-to-char (ash (logand a 3) 4))) "==")
+       ))))
+
+(defun base64-encode-string (string)
+  "Encode STRING to base64, and return the result."
+  (let ((len (length string))
+	(b 0)(e 57)
+	dest)
+    (while (< e len)
+      (setq dest
+	    (concat dest
+		    (mapconcat
+		     (function base64-encode-1)
+		     (pack-sequence (substring string b e) 3)
+		     "")
+		    "\n"))
+      (setq b e
+	    e (+ e 57)
+	    )
+      )
+    (let* ((es (mapconcat
+		(function base64-encode-1)
+		(pack-sequence (substring string b) 3)
+		""))
+	   (m (mod (length es) 4))
+	   )
+      (concat dest es (cond ((= m 3) "=")
+			    ((= m 2) "==")
+			    ))
+      )))
+
+(defun base64-internal-encode-region (beg end)
+  (save-excursion
+    (save-restriction
+      (narrow-to-region beg end)
+      (let ((str (buffer-substring beg end)))
+	(delete-region beg end)
+	(insert (base64-encode-string str))
+	)
+      (or (bolp)
+	  (insert "\n")
+	  )
+      )))
+
+
+;;; @ internal base64 decoder
+;;;
+
+(defconst base64-numbers
+  `,(let ((len (length base64-characters))
+	  (vec (make-vector 123 nil))
+	  (i 0))
+      (while (< i len)
+	(aset vec (aref base64-characters i) i)
+	(setq i (1+ i)))
+      vec))
+
+(defmacro base64-char-to-num (c)
+  `(aref base64-numbers ,c))
+
+(defsubst base64-internal-decode (string buffer)
+  (let* ((len (length string))
+	 (i 0)
+	 (j 0)
+	 v1 v2 v3)
+    (catch 'tag
+      (while (< i len)
+	(when (prog1 (setq v1 (base64-char-to-num (aref string i)))
+		(setq i (1+ i)))
+	  (setq v2 (base64-char-to-num (aref string i))
+		i (1+ i)
+		v3 (base64-char-to-num (aref string i))
+		i (1+ i))
+	  (aset buffer j (logior (lsh v1 2)(lsh v2 -4)))
+	  (setq j (1+ j))
+	  (if v3
+	      (let ((v4 (base64-char-to-num (aref string i))))
+		(setq i (1+ i))
+		(aset buffer j (logior (lsh (logand v2 15) 4)(lsh v3 -2)))
+		(setq j (1+ j))
+		(if v4
+		    (aset buffer (prog1 j (setq j (1+ j)))
+			  (logior (lsh (logand v3 3) 6) v4))
+		  (throw 'tag nil)
+		  ))
+	    (throw 'tag nil)
+	    ))))
+    (substring buffer 0 j)
+    ))
+
+(defun base64-internal-decode-string (string)
+  (base64-internal-decode string (make-string (length string) 0)))
+
+(defsubst base64-decode-string! (string)
+  (base64-internal-decode string string))
+
+(defun base64-internal-decode-region (beg end)
+  (save-excursion
+    (let ((str (buffer-substring beg end)))
+      (delete-region beg end)
+      (goto-char beg)
+      (insert (base64-decode-string! str)))))
+
+
+;;; @ external encoder/decoder
+;;;
+
+(defun base64-external-encode-region (beg end)
+  (save-excursion
+    (save-restriction
+      (narrow-to-region beg end)
+      (as-binary-process
+       (apply (function call-process-region)
+	      beg end (car base64-external-encoder)
+	      t t nil (cdr base64-external-encoder)))
+      ;; for OS/2
+      ;;   regularize line break code
+      (goto-char (point-min))
+      (while (re-search-forward "\r$" nil t)
+	(replace-match ""))
+      )))
+
+(defun base64-external-decode-region (beg end)
+  (save-excursion
+    (as-binary-process
+     (apply (function call-process-region)
+	    beg end (car base64-external-decoder)
+	    t t nil (cdr base64-external-decoder)))
+    ))
+
+(defun base64-external-decode-string (string)
+  (with-temp-buffer
+    (insert string)
+    (as-binary-process
+     (apply (function call-process-region)
+	    (point-min) (point-max)
+	    (car base64-external-decoder)
+	    t t nil (cdr base64-external-decoder)))
+    (buffer-string)))
+
+
+;;; @ application interfaces
+;;;
+
+(defun base64-encode-region (start end)
+  "Encode current region by base64.
+START and END are buffer positions.
+This function calls internal base64 encoder if size of region is
+smaller than `base64-internal-encoding-limit', otherwise it calls
+external base64 encoder specified by `base64-external-encoder'.  In
+this case, you must install the program (maybe mmencode included in
+metamail or XEmacs package)."
+  (interactive "r")
+  (if (and base64-internal-encoding-limit
+	   (> (- end start) base64-internal-encoding-limit))
+      (base64-external-encode-region start end)
+    (base64-internal-encode-region start end)))
+
+(defun base64-decode-region (start end)
+  "Decode current region by base64.
+START and END are buffer positions.
+This function calls internal base64 decoder if size of region is
+smaller than `base64-internal-decoding-limit', otherwise it calls
+external base64 decoder specified by `base64-external-decoder'.  In
+this case, you must install the program (maybe mmencode included in
+metamail or XEmacs package)."
+  (interactive "r")
+  (if (and base64-internal-decoding-limit
+	   (> (- end start) base64-internal-decoding-limit))
+      (base64-external-decode-region start end)
+    (base64-internal-decode-region start end)))
+
+(defun base64-decode-string (string)
+  "Decode STRING which is encoded in base64, and return the result.
+This function calls internal base64 decoder if size of STRING is
+smaller than `base64-internal-decoding-limit', otherwise it calls
+external base64 decoder specified by `base64-external-decoder'.  In
+this case, you must install the program (maybe mmencode included in
+metamail or XEmacs package)."
+  (interactive "r")
+  (if (and base64-internal-decoding-limit
+	   (> (length string) base64-internal-decoding-limit))
+      (base64-external-decode-string string)
+    (base64-internal-decode-string string)))
+
+
+(defun base64-insert-encoded-file (filename)
+  "Encode contents of file FILENAME to base64, and insert the result.
+It calls external base64 encoder specified by
+`base64-external-encoder'.  So you must install the program (maybe
+mmencode included in metamail or XEmacs package)."
+  (interactive (list (read-file-name "Insert encoded file: ")))
+  (if (and base64-internal-encoding-limit
+	   (> (nth 7 (file-attributes filename))
+	      base64-internal-encoding-limit))
+      (apply (function call-process) (car base64-external-encoder)
+	     filename t nil (cdr base64-external-encoder))
+    (insert
+     (base64-encode-string
+      (with-temp-buffer
+	(insert-file-contents-as-binary filename)
+	(buffer-string))))
+    (or (bolp)
+	(insert "\n"))
+     ))
+
+(defun base64-write-decoded-region (start end filename)
+  "Decode and write current region encoded by base64 into FILENAME.
+START and END are buffer positions."
+  (interactive
+   (list (region-beginning) (region-end)
+	 (read-file-name "Write decoded region to file: ")))
+  (if (and base64-internal-decoding-limit
+	   (> (- end start) base64-internal-decoding-limit))
+      (as-binary-process
+       (apply (function call-process-region)
+	      start end (car base64-external-decoder)
+	      nil nil nil
+	      (append (cdr base64-external-decoder)
+		      base64-external-decoder-option-to-specify-file
+		      (list filename))))
+    (let ((str (buffer-substring start end)))
+      (with-temp-buffer
+	(insert (base64-internal-decode-string str))
+	(write-region-as-binary (point-min) (point-max) filename)))))
+
+       
+;;; @ etc
+;;;
+
+(defun pack-sequence (seq size)
+  "Split sequence SEQ into SIZE elements packs,
+and return list of packs. [mel-b-el; tl-seq function]"
+  (let ((len (length seq)) (p 0) obj
+	unit (i 0)
+	dest)
+    (while (< p len)
+      (setq obj (elt seq p))
+      (setq unit (cons obj unit))
+      (setq i (1+ i))
+      (if (= i size)
+	  (progn
+	    (setq dest (cons (reverse unit) dest))
+	    (setq unit nil)
+	    (setq i 0)
+	    ))
+      (setq p (1+ p))
+      )
+    (if unit
+	(setq dest (cons (reverse unit) dest))
+      )
+    (reverse dest)
+    ))
+
+
+;;; @ end
+;;;
+
+(provide 'mel-b-el)
+
+;;; mel-b-el.el ends here.