X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=mel-q.el;h=5c9f7c547e5c1af8ca51bb3cca6208246aa612ad;hb=2cc492c20479075c905b60bb50bbbd18b51e573a;hp=8a368407fdb00bdd21758ac812d0d86aab2f8596;hpb=83dbd1a8eca87310a8b745e9132a51c22478d003;p=elisp%2Fflim.git

diff --git a/mel-q.el b/mel-q.el
index 8a36840..5c9f7c5 100644
--- a/mel-q.el
+++ b/mel-q.el
@@ -1,282 +1,312 @@
-;;;
-;;; mel-q.el: Quoted-Printable encoder/decoder for GNU Emacs
-;;;
-;;; Copyright (C) 1995 Free Software Foundation, Inc.
-;;; Copyright (C) 1995,1996 MORIOKA Tomohiko
-;;;
-;;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
-;;; Maintainer: MORIOKA Tomohiko <morioka@jaist.ac.jp>
-;;; Created: 1995/6/25
-;;; Version:
-;;;	$Id: mel-q.el,v 3.1 1996/01/09 18:28:53 morioka Exp $
-;;; Keywords: MIME, Quoted-Printable
-;;;
-;;; 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 This program.  If not, write to the Free Software
-;;; Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-;;;
-;;; Code:
-
+;;; mel-q.el --- Quoted-Printable encoder/decoder.
 
-;;; @ constants
-;;;
+;; Copyright (C) 1995,96,97,98,99,2000,2001 Free Software Foundation, Inc.
 
-(defconst quoted-printable-hex-chars "0123456789ABCDEF")
-(defconst quoted-printable-octet-regexp
-  (concat "=[" quoted-printable-hex-chars
-	  "][" quoted-printable-hex-chars "]"))
+;; Author: MORIOKA Tomohiko <tomo@m17n.org>
+;; Created: 1995/6/25
+;; Keywords: MIME, Quoted-Printable, Q-encoding
 
+;; This file is part of FLIM (Faithful Library about Internet Message).
 
-;;; @ variables
-;;;
+;; 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.
 
-(defvar quoted-printable-external-encoder '("mmencode" "-q")
-  "*list of quoted-printable encoder program name and its arguments.")
+;; 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.
 
-(defvar quoted-printable-external-decoder '("mmencode" "-q" "-u")
-  "*list of quoted-printable decoder program name and its arguments.")
+;; You should have received a copy of the GNU General Public License
+;; along with this program; see the file COPYING.  If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
 
-(defvar quoted-printable-internal-encoding-limit 10000
-  "*limit size to use internal quoted-printable encoder.
-If size of input to encode is larger than this limit,
-external encoder is called.")
+;;; Code:
 
-(defvar quoted-printable-internal-decoding-limit nil
-  "*limit size to use internal quoted-printable decoder.
-If size of input to decode is larger than this limit,
-external decoder is called.")
+(require 'mime-def)
+(require 'path-util)
+(eval-when-compile
+  ;; XXX: should provide char-list instead of string-to-char-list.
+  ;; XXx: and also the macro `as-binary-process' should be provided
+  ;; XXx: by the module "pces" which will be loaded by way of "poem".
+  (require 'poem))
 
 
-;;; @ Quoted-Printable (Q-encode) encoder/decoder
+;;; @ Quoted-Printable encoder
 ;;;
 
-(defun quoted-printable-quote-char (chr)
-  (concat "="
-	  (char-to-string (elt quoted-printable-hex-chars (ash chr -4)))
-	  (char-to-string (elt quoted-printable-hex-chars (logand chr 15)))
-	  ))
-
+(defsubst quoted-printable-quote-char (character)
+  (concat
+   "="
+   (char-to-string (aref quoted-printable-hex-chars (ash character -4)))
+   (char-to-string (aref quoted-printable-hex-chars (logand character 15)))))
 
-;;; @@ Quoted-Printable encode/decode string
-;;;
-
-(defun quoted-printable-encode-string (str)
-  (let ((i 0))
-    (mapconcat (function
-		(lambda (chr)
-		  (cond ((eq chr ?\n)
-			 (setq i 0)
-			 "\n")
-			((or (< chr 32) (< 126 chr) (eq chr ?=))
-			 (if (>= i 73)
-			     (progn
-			       (setq i 3)
-			       (concat "=\n" (quoted-printable-quote-char chr))
-			       )
-			   (progn
-			     (setq i (+ i 3))
-			     (quoted-printable-quote-char chr)
-			     )))
-			(t (if (>= i 75)
-			       (progn
-				 (setq i 1)
-				 (concat "=\n" (char-to-string chr))
-				 )
-			     (progn
-			       (setq i (1+ i))
-			       (char-to-string chr)
-			       )))
-			)))
-	       str "")))
-
-(defun quoted-printable-decode-string (str)
-  (let (q h l)
-    (mapconcat (function
-		(lambda (chr)
-		  (cond ((eq chr ?=)
-			 (setq q t)
-			 "")
-			(q (setq h
-				 (cond ((<= ?a chr) (+ (- chr ?a) 10))
-				       ((<= ?A chr) (+ (- chr ?A) 10))
-				       ((<= ?0 chr) (- chr ?0))
-				       ))
-			   (setq q nil)
-			   "")
-			(h (setq l (cond ((<= ?a chr) (+ (- chr ?a) 10))
-					 ((<= ?A chr) (+ (- chr ?A) 10))
-					 ((<= ?0 chr) (- chr ?0))
-					 ))
-			   (prog1
-			       (char-to-string (logior (ash h 4) l))
-			     (setq h nil)
-			     )
-			   )
-			(t (char-to-string chr))
-			)))
-	       str "")))
+(defun quoted-printable-internal-encode-region (start end)
+  (save-excursion
+    (save-restriction
+      (narrow-to-region (goto-char start) end)
+      (let ((col 0)
+	    chr)
+	(while (not (eobp))
+	  (cond
+	   ((>= col 75)			; soft line break.
+	    (insert "=\n")
+	    (setq col 0))
+	   ((eolp)			; end of line.
+	    (forward-char)
+	    (setq col 0))
+	   (t
+	    (setq chr (char-after (point)))
+	    (cond
+	     ((and (memq chr '(?  ?\t))	; encode WSP char before CRLF.
+		   (eq (char-after (1+ (point))) ?\n))
+	      (forward-char)
+	      (insert "=\n")
+	      (forward-char)
+	      (setq col 0))
+	     ((and (bolp)		; "^From " is not safe.
+		   (eq chr			  ?F)
+		   (eq (char-after (1+  (point))) ?r)
+		   (eq (char-after (+ 2 (point))) ?o)
+		   (eq (char-after (+ 3 (point))) ?m)
+		   (eq (char-after (+ 4 (point))) ? ))
+	      (delete-region (point)(1+ (point)))
+	      (insert "=46")		; moved to ?r.
+	      (forward-char 4)		; skip "rom ".
+	      (setq col 7))
+	     ((or (= chr ?\t)		; skip safe char.
+		  (and (<= 32 chr)(/= chr ?=)(< chr 127)))
+	      (forward-char)
+	      (setq col (1+ col)))
+	     ((>= col 73)		; soft line break.
+	      (insert "=\n")
+	      (setq col 0))
+	     (t				; encode unsafe char.
+	      (delete-region (point)(1+ (point)))
+	      ;; (insert (quoted-printable-quote-char chr))
+	      (insert
+	       ?=
+	       (aref quoted-printable-hex-chars (ash chr -4))
+	       (aref quoted-printable-hex-chars (logand chr 15)))
+	      (setq col (+ col 3)))))))))))
 
 
-;;; @@ Quoted-Printable encode/decode region
-;;;
+(defvar quoted-printable-external-encoder '("mmencode" "-q")
+  "*list of quoted-printable encoder program name and its arguments.")
 
-(defun quoted-printable-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 (quoted-printable-encode-string str))
-	)
-      (or (bolp)
-	  (insert "=\n")
-	  )
-      )))
-
-(defun quoted-printable-internal-decode-region (beg end)
+(defun quoted-printable-external-encode-region (start end)
   (save-excursion
     (save-restriction
-      (narrow-to-region beg end)
-      (goto-char (point-min))
-      (while (re-search-forward "=\n" nil t)
-	(replace-match "")
-	)
-      (goto-char (point-min))
-      (let (b e str)
-	(while (re-search-forward quoted-printable-octet-regexp nil t)
-	  (setq b (match-beginning 0))
-	  (setq e (match-end 0))
-	  (setq str (buffer-substring b e))
-	  (delete-region b e)
-	  (insert (quoted-printable-decode-string str))
-	  ))
-      )))
-
-(cond ((boundp 'MULE)
-       (define-program-coding-system
-	 nil (car quoted-printable-external-encoder) *noconv*)
-       (define-program-coding-system
-	 nil (car quoted-printable-external-decoder) *noconv*)
-       )
-      ((boundp 'NEMACS)
-       (define-program-kanji-code
-	 nil (car quoted-printable-external-encoder) 0)
-       (define-program-kanji-code
-	 nil (car quoted-printable-external-decoder) 0)
-       ))
-
-(defun quoted-printable-external-encode-region (beg end)
-  (save-excursion
-    (save-restriction
-      (narrow-to-region beg end)
-      (let ((selective-display nil) ;Disable ^M to nl translation.
-	    (mc-flag nil)      ;Mule
-	    (kanji-flag nil))  ;NEmacs
-	(apply (function call-process-region)
-	       beg end (car quoted-printable-external-encoder)
-	       t t nil (cdr quoted-printable-external-encoder))
-	)
+      (narrow-to-region start end)
+      (as-binary-process
+       (apply (function call-process-region)
+	      start end (car quoted-printable-external-encoder)
+	      t t nil
+	      (cdr quoted-printable-external-encoder)))
       ;; for OS/2
       ;;   regularize line break code
       (goto-char (point-min))
       (while (re-search-forward "\r$" nil t)
-	(replace-match "")
-	)
-      )))
+	(replace-match "")))))
+
+
+(defvar quoted-printable-internal-encoding-limit
+  (if (and (featurep 'xemacs)(featurep 'mule))
+      0
+    (require 'path-util)
+    (if (exec-installed-p "mmencode")
+	1000
+      ;; XXX: Fix this message, or simply remove it.
+      ;; (message "Don't found external encoder for Quoted-Printable!")
+      nil))
+  "*limit size to use internal quoted-printable encoder.
+If size of input to encode is larger than this limit,
+external encoder is called.")
 
-(defun quoted-printable-external-decode-region (beg end)
-  (save-excursion
-    (let ((selective-display nil) ;Disable ^M to nl translation.
-	  (mc-flag nil)      ;Mule
-	  (kanji-flag nil))  ;NEmacs
-      (apply (function call-process-region)
-	     beg end (car quoted-printable-external-decoder)
-	     t t nil (cdr quoted-printable-external-decoder))
-      )))
-
-(defun quoted-printable-encode-region (beg end)
-  (interactive "r")
+(defun quoted-printable-encode-region (start end)
+  "Encode current region by quoted-printable.
+START and END are buffer positions.
+This function calls internal quoted-printable encoder if size of
+region is smaller than `quoted-printable-internal-encoding-limit',
+otherwise it calls external quoted-printable encoder specified by
+`quoted-printable-external-encoder'.  In this case, you must install
+the program (maybe mmencode included in metamail or XEmacs package)."
+  (interactive "*r")
   (if (and quoted-printable-internal-encoding-limit
-	   (> (- end beg) quoted-printable-internal-encoding-limit))
-      (quoted-printable-external-encode-region beg end)
-    (quoted-printable-internal-encode-region beg end)
-    ))
+	   (> (- end start) quoted-printable-internal-encoding-limit))
+      (quoted-printable-external-encode-region start end)
+    (quoted-printable-internal-encode-region start end)))
+
+(defun quoted-printable-encode-string (string)
+  "Encode STRING to quoted-printable, and return the result."
+  (with-temp-buffer
+    (insert string)
+    (quoted-printable-encode-region (point-min)(point-max))
+    (buffer-string)))
+
+
+(mel-define-method-function
+ (mime-encode-string string (nil "quoted-printable"))
+ 'quoted-printable-encode-string)
+
+(mel-define-method-function
+ (mime-encode-region start end (nil "quoted-printable"))
+ 'quoted-printable-encode-region)
+
+(mel-define-method mime-insert-encoded-file (filename (nil "quoted-printable"))
+  "Encode contents of file FILENAME to quoted-printable, and insert the result.
+It calls external quoted-printable encoder specified by
+`quoted-printable-external-encoder'.  So you must install the program
+\(maybe mmencode included in metamail or XEmacs package)."
+  (interactive "*fInsert encoded file: ")
+  (apply (function call-process)
+	 (car quoted-printable-external-encoder)
+	 filename t nil
+	 (cdr quoted-printable-external-encoder)))
+
+
+;;; @ Quoted-Printable decoder
+;;;
 
-(defun quoted-printable-decode-region (beg end)
-  (interactive "r")
-  (if (and quoted-printable-internal-decoding-limit
-	   (> (- end beg) quoted-printable-internal-decoding-limit))
-      (quoted-printable-external-decode-region beg end)
-    (quoted-printable-internal-decode-region beg end)
-    ))
+(defsubst quoted-printable-hex-char-to-num (chr)
+  (cond ((<= ?a chr) (+ (- chr ?a) 10))
+	((<= ?A chr) (+ (- chr ?A) 10))
+	((<= ?0 chr) (- chr ?0))
+	))
 
+(defun quoted-printable-internal-decode-region (start end)
+  (save-excursion
+    (save-restriction
+      (narrow-to-region start end)
+      (goto-char (point-min))
+      (while (search-forward "=" nil t)
+	(cond
+	 ((eolp)
+	  ;; unfold soft line break.
+	  (delete-region (1- (point))(1+ (point))))
+	 ((and (memq (char-after (point))
+		     (eval-when-compile
+		       ;; XXX: should provide char-list instead.
+		       (string-to-char-list quoted-printable-hex-chars)))
+	       (memq (char-after (1+ (point)))
+		     (eval-when-compile
+		       ;; XXX: should provide char-list instead.
+		       (string-to-char-list quoted-printable-hex-chars))))
+	  ;; encoded char.
+	  (insert
+	   (prog1
+	       (logior
+		(ash (quoted-printable-hex-char-to-num (char-after (point))) 4)
+		(quoted-printable-hex-char-to-num (char-after (1+ (point)))))
+	     (delete-region (1- (point))(+ 2 (point))))))
+	 (t
+	  ;; invalid encoding.
+	  ))))))
 
+(defvar quoted-printable-external-decoder '("mmencode" "-q" "-u")
+  "*list of quoted-printable decoder program name and its arguments.")
+
+(defun quoted-printable-external-decode-region (start end)
+  (save-excursion
+    (as-binary-process
+     (apply (function call-process-region)
+	    start end (car quoted-printable-external-decoder)
+	    t t nil
+	    (cdr quoted-printable-external-decoder)))))
+
+
+(defvar quoted-printable-internal-decoding-limit nil
+  "*limit size to use internal quoted-printable decoder.
+If size of input to decode is larger than this limit,
+external decoder is called.")
+
+(defun quoted-printable-decode-region (start end)
+  "Decode current region by quoted-printable.
+START and END are buffer positions.
+This function calls internal quoted-printable decoder if size of
+region is smaller than `quoted-printable-internal-decoding-limit',
+otherwise it calls external quoted-printable decoder specified by
+`quoted-printable-external-decoder'.  In this case, you must install
+the program (maybe mmencode included in metamail or XEmacs package)."
+  (interactive "*r")
+  (if (and quoted-printable-internal-decoding-limit
+	   (> (- end start) quoted-printable-internal-decoding-limit))
+      (quoted-printable-external-decode-region start end)
+    (quoted-printable-internal-decode-region start end)))
+
+(defun quoted-printable-decode-string (string)
+  "Decode STRING which is encoded in quoted-printable, and return the result."
+  (with-temp-buffer
+    (insert string)
+    (quoted-printable-decode-region (point-min)(point-max))
+    (buffer-string)))
+
+
+(mel-define-method-function
+ (mime-decode-string string (nil "quoted-printable"))
+ 'quoted-printable-decode-string)
+
+(mel-define-method-function
+ (mime-decode-region start end (nil "quoted-printable"))
+ 'quoted-printable-decode-region)
+
+
+(defvar quoted-printable-external-decoder-option-to-specify-file '("-o")
+  "*list of options of quoted-printable decoder program to specify file.
+If the quoted-printable decoder does not have such option, set this as nil.")
+
+(mel-define-method mime-write-decoded-region (start end filename
+						    (nil "quoted-printable"))
+  "Decode and write current region encoded by quoted-printable into FILENAME.
+START and END are buffer positions."
+  (interactive "*r\nFWrite decoded region to file: ")
+  (as-binary-process
+   (apply (function call-process-region)
+	  start end (car quoted-printable-external-decoder)
+	  (null quoted-printable-external-decoder-option-to-specify-file)
+	  (unless quoted-printable-external-decoder-option-to-specify-file
+	    (list (current-buffer) nil))
+	  nil
+	  (delq nil
+		(append
+		 (cdr quoted-printable-external-decoder)
+		 quoted-printable-external-decoder-option-to-specify-file
+		 (when quoted-printable-external-decoder-option-to-specify-file
+		   (list filename))))))
+  (unless quoted-printable-external-decoder-option-to-specify-file
+    (write-region-as-binary (point-min) (point-max) filename)))
+
+
 ;;; @ Q-encoding encode/decode string
 ;;;
 
-(defun q-encoding-encode-string-for-text (str)
-  (mapconcat (function
-	      (lambda (chr)
-		(cond ((eq chr 32) "_")
-		      ((or (< chr 32) (< 126 chr) (eq chr ?=))
-		       (quoted-printable-quote-char chr)
-		       )
-		      (t (char-to-string chr))
-		      )))
-	     str ""))
-
-(defun q-encoding-encode-string-for-comment (str)
-  (mapconcat (function
-	      (lambda (chr)
-		(cond ((eq chr 32) "_")
-		      ((or (< chr 32) (< 126 chr)
-			   (memq chr '(?= ?\( ?\) ?\\))
-			   )
-		       (quoted-printable-quote-char chr)
-		       )
-		      (t (char-to-string chr))
-		      )))
-	     str ""))
-
-(defun q-encoding-encode-string-for-phrase (str)
-  (mapconcat (function
-	      (lambda (chr)
-		(cond ((eq chr 32) "_")
-		      ((or (and (<= ?A chr)(<= chr ?Z))
-			   (and (<= ?a chr)(<= chr ?z))
-			   (and (<= ?0 chr)(<= chr ?9))
-			   (memq chr '(?! ?* ?+ ?- ?/))
-			   )
-		       (char-to-string chr)
-		       )
-		      (t (quoted-printable-quote-char chr))
-		      )))
-	     str ""))
-
-(defun q-encoding-encode-string (str &optional mode)
-  (cond ((eq mode 'text)
-	 (q-encoding-encode-string-for-text str)
-	 )
-	((eq mode 'comment)
-	 (q-encoding-encode-string-for-comment str)
-	 )
-	(t
-	 (q-encoding-encode-string-for-phrase str)
-	 )))
-
-(defun q-encoding-decode-string (str)
+(defconst q-encoding-special-chars-alist
+  '((text	?= ?? ?_)
+    (comment	?= ?? ?_ ?\( ?\) ?\\)
+    (phrase	?= ?? ?_ ?\( ?\) ?\\ ?\" ?# ?$ ?% ?& ?' ?, ?. ?/
+		?: ?\; ?< ?> ?@ ?\[ ?\] ?^ ?` ?{ ?| ?} ?~)
+    ))
+
+(defun q-encoding-encode-string (string &optional mode)
+  "Encode STRING to Q-encoding of encoded-word, and return the result.
+MODE allows `text', `comment', `phrase' or nil.  Default value is
+`phrase'."
+  (let ((specials (cdr (or (assq mode q-encoding-special-chars-alist)
+			   (assq 'phrase q-encoding-special-chars-alist)))))
+    (mapconcat (function
+		(lambda (chr)
+		  (cond ((eq chr ? ) "_")
+			((or (< chr 32) (< 126 chr)
+			     (memq chr specials))
+			 (quoted-printable-quote-char chr))
+			(t
+			 (char-to-string chr)))))
+	       string "")))
+
+(defun q-encoding-decode-string (string)
+  "Decode STRING which is encoded in Q-encoding and return the result."
   (let (q h l)
     (mapconcat (function
 		(lambda (chr)
@@ -284,42 +314,30 @@ external decoder is called.")
 			((eq chr ?=)
 			 (setq q t)
 			 "")
-			(q (setq h (cond ((<= ?a chr) (+ (- chr ?a) 10))
-					 ((<= ?A chr) (+ (- chr ?A) 10))
-					 ((<= ?0 chr) (- chr ?0))
-					 ))
+			(q (setq h (quoted-printable-hex-char-to-num chr))
 			   (setq q nil)
 			   "")
-			(h (setq l (cond ((<= ?a chr) (+ (- chr ?a) 10))
-					 ((<= ?A chr) (+ (- chr ?A) 10))
-					 ((<= ?0 chr) (- chr ?0))
-					 ))
+			(h (setq l (quoted-printable-hex-char-to-num chr))
 			   (prog1
 			       (char-to-string (logior (ash h 4) l))
-			     (setq h nil)
-			     )
-			   )
-			(t (char-to-string chr))
-			)))
-	       str "")))
-
+			     (setq h nil)))
+			(t (char-to-string chr)))))
+	       string "")))
 
-;;; @@ etc
-;;;
+(mel-define-method-function (encoded-text-encode-string string (nil "Q"))
+			    'q-encoding-encode-string)
 
-(defun q-encoding-encoded-length (string &optional mode)
-  (let ((l 0)(i 0)(len (length string)) chr)
-    (while (< i len)
-      (setq chr (elt string i))
-      (if (string-match "[A-Za-z0-9!*+/=_---]" (char-to-string chr))
-	  (setq l (+ l 1))
-	(setq l (+ l 3))
-	)
-      (setq i (+ i 1)) )
-    l))
+(mel-define-method encoded-text-decode-string (string (nil "Q"))
+  (if (string-match (eval-when-compile
+		      (concat "\\`" Q-encoded-text-regexp "\\'"))
+		    string)
+      (q-encoding-decode-string string)
+    (error "Invalid encoded-text %s" string)))
 
 
 ;;; @ end
 ;;;
 
 (provide 'mel-q)
+
+;;; mel-q.el ends here.