X-Git-Url: http://cgit.sxemacs.org/?a=blobdiff_plain;f=lisp%2Frfc2231.el;h=dd391b122bc6453b9896de11e57515e0f1bee95b;hb=18f689485e63d1f4f9c476dd4d2549f2e705bf28;hp=cb0d53d6b636846a16f6635daeb04fd439dc53cf;hpb=2e33d39729730bd9b58520e013ce3e53250eeb15;p=gnus

diff --git a/lisp/rfc2231.el b/lisp/rfc2231.el
index cb0d53d6b..dd391b122 100644
--- a/lisp/rfc2231.el
+++ b/lisp/rfc2231.el
@@ -1,5 +1,6 @@
 ;;; rfc2231.el --- Functions for decoding rfc2231 headers
-;; Copyright (C) 1998 Free Software Foundation, Inc.
+
+;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
 
 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;; This file is part of GNU Emacs.
@@ -23,12 +24,19 @@
 
 ;;; Code:
 
+(eval-when-compile (require 'cl))
 (require 'ietf-drums)
+(require 'rfc2047)
 
 (defun rfc2231-get-value (ct attribute)
   "Return the value of ATTRIBUTE from CT."
   (cdr (assq attribute (cdr ct))))
 
+(defun rfc2231-parse-qp-string (string)
+  "Parse QP-encoded string using `rfc2231-parse-string'.
+N.B.  This is in violation with RFC2047, but it seem to be in common use."
+  (rfc2231-parse-string (rfc2047-decode-string string)))
+
 (defun rfc2231-parse-string (string)
   "Parse STRING and return a list.
 The list will be on the form
@@ -42,9 +50,12 @@ The list will be on the form
 	  attribute value type subtype number encoded
 	  prev-attribute)
       (ietf-drums-init (mail-header-remove-whitespace
-		   (mail-header-remove-comments string)))
+			(mail-header-remove-comments string)))
       (let ((table (copy-syntax-table ietf-drums-syntax-table)))
 	(modify-syntax-entry ?\' "w" table)
+	;; The following isn't valid, but one should be liberal
+	;; in what one receives.
+	(modify-syntax-entry ?\: "w" table)
 	(set-syntax-table table))
       (setq c (char-after))
       (when (and (memq c ttoken)
@@ -57,63 +68,69 @@ The list will be on the form
 	  (unless (eq c ?\;)
 	    (error "Invalid header: %s" string))
 	  (forward-char 1)
-	  (setq c (char-after))
-	  (if (and (memq c ttoken)
-		   (not (memq c stoken)))
-	      (setq attribute
-		    (intern
-		     (downcase
-		      (buffer-substring
-		       (point) (progn (forward-sexp 1) (point))))))
-	    (error "Invalid header: %s" string))
-	  (setq c (char-after))
-	  (setq encoded nil)
-	  (when (eq c ?*)
-	    (forward-char 1)
+	  ;; If c in nil, then this is an invalid header, but
+	  ;; since elm generates invalid headers on this form,
+	  ;; we allow it.
+	  (when (setq c (char-after))
+	    (if (and (memq c ttoken)
+		     (not (memq c stoken)))
+		(setq attribute
+		      (intern
+		       (downcase
+			(buffer-substring
+			 (point) (progn (forward-sexp 1) (point))))))
+	      (error "Invalid header: %s" string))
 	    (setq c (char-after))
-	    (when (memq c ntoken)
-	      (setq number
-		    (string-to-number
-		     (buffer-substring
-		      (point) (progn (forward-sexp 1) (point)))))
+	    (setq encoded nil)
+	    (when (eq c ?*)
+	      (forward-char 1)
 	      (setq c (char-after))
-	      (when (eq c ?*)
-		(setq encoded t)
-		(forward-char 1)
-		(setq c (char-after)))))
-	  ;; See if we have any previous continuations.
-	  (when (and prev-attribute
-		     (not (eq prev-attribute attribute)))
-	    (push (cons prev-attribute prev-value) parameters)
-	    (setq prev-attribute nil
-		  prev-value ""))
-	  (unless (eq c ?=)
-	    (error "Invalid header: %s" string))
-	  (forward-char 1)
-	  (setq c (char-after))
-	  (cond
-	   ((eq c ?\")
-	    (setq value
-		  (buffer-substring (1+ (point))
-				    (progn (forward-sexp 1) (1- (point))))))
-	   ((and (memq c ttoken)
-		 (not (memq c stoken)))
-	    (setq value (buffer-substring
-			 (point) (progn (forward-sexp 1) (point)))))
-	   (t
-	    (error "Invalid header: %s" string)))
-	  (when encoded
-	    (setq value (rfc2231-decode-encoded-string value)))
-	  (if number
-	      (setq prev-attribute attribute
-		    prev-value (concat prev-value value))
-	    (push (cons attribute value) parameters)))
+	      (if (not (memq c ntoken))
+		  (setq encoded t
+			number nil)
+		(setq number
+		      (string-to-number
+		       (buffer-substring
+			(point) (progn (forward-sexp 1) (point)))))
+		(setq c (char-after))
+		(when (eq c ?*)
+		  (setq encoded t)
+		  (forward-char 1)
+		  (setq c (char-after)))))
+	    ;; See if we have any previous continuations.
+	    (when (and prev-attribute
+		       (not (eq prev-attribute attribute)))
+	      (push (cons prev-attribute prev-value) parameters)
+	      (setq prev-attribute nil
+		    prev-value ""))
+	    (unless (eq c ?=)
+	      (error "Invalid header: %s" string))
+	    (forward-char 1)
+	    (setq c (char-after))
+	    (cond
+	     ((eq c ?\")
+	      (setq value
+		    (buffer-substring (1+ (point))
+				      (progn (forward-sexp 1) (1- (point))))))
+	     ((and (memq c ttoken)
+		   (not (memq c stoken)))
+	      (setq value (buffer-substring
+			   (point) (progn (forward-sexp 1) (point)))))
+	     (t
+	      (error "Invalid header: %s" string)))
+	    (when encoded
+	      (setq value (rfc2231-decode-encoded-string value)))
+	    (if number
+		(setq prev-attribute attribute
+		      prev-value (concat prev-value value))
+	      (push (cons attribute value) parameters))))
 
 	;; Take care of any final continuations.
 	(when prev-attribute
 	  (push (cons prev-attribute prev-value) parameters))
 
-	`(,type ,@(nreverse parameters))))))
+	(when type
+	  `(,type ,@(nreverse parameters)))))))
 
 (defun rfc2231-decode-encoded-string (string)
   "Decode an RFC2231-encoded string.
@@ -131,12 +148,72 @@ These look like \"us-ascii'en-us'This%20is%20%2A%2A%2Afun%2A%2A%2A\"."
 	     (string-to-number (buffer-substring (point) (+ (point) 2)) 16)
 	   (delete-region (1- (point)) (+ (point) 2)))))
       ;; Encode using the charset, if any.
-      (when (and (< (length elems) 1)
+      (when (and (mm-multibyte-p)
+		 (> (length elems) 1)
 		 (not (equal (intern (car elems)) 'us-ascii)))
 	(mm-decode-coding-region (point-min) (point-max)
 				 (intern (car elems))))
       (buffer-string))))
 
+(defun rfc2231-encode-string (param value)
+  "Return and PARAM=VALUE string encoded according to RFC2231."
+  (let ((control (ietf-drums-token-to-list ietf-drums-no-ws-ctl-token))
+	(tspecial (ietf-drums-token-to-list ietf-drums-tspecials))
+	(special (ietf-drums-token-to-list "*'%\n\t"))
+	(ascii (ietf-drums-token-to-list ietf-drums-text-token))
+	(num -1)
+	spacep encodep charsetp charset broken)
+    (with-temp-buffer
+      (insert value)
+      (goto-char (point-min))
+      (while (not (eobp))
+	(cond
+	 ((or (memq (following-char) control)
+	      (memq (following-char) tspecial)
+	      (memq (following-char) special))
+	  (setq encodep t))
+	 ((eq (following-char) ? )
+	  (setq spacep t))
+	 ((not (memq (following-char) ascii))
+	  (setq charsetp t)))
+	(forward-char 1))
+      (when charsetp
+	(setq charset (mm-encode-body)))
+      (cond
+       ((or encodep charsetp)
+	(goto-char (point-min))
+	(while (not (eobp))
+	  (when (> (current-column) 60)
+	    (insert ";\n")
+	    (setq broken t))
+	  (if (or (not (memq (following-char) ascii))
+		  (memq (following-char) control)
+		  (memq (following-char) tspecial)
+		  (memq (following-char) special)
+		  (eq (following-char) ? ))
+	      (progn
+		(insert "%" (format "%02x" (following-char)))
+		(delete-char 1))
+	    (forward-char 1)))
+	(goto-char (point-min))
+	(insert (symbol-name (or charset 'us-ascii)) "''")
+	(goto-char (point-min))
+	(if (not broken)
+	    (insert param "*=")
+	  (while (not (eobp))
+	    (insert (if (>= num 0) " " "\n ")
+		    param "*" (format "%d" (incf num)) "*=")
+	    (forward-line 1))))
+       (spacep
+	(goto-char (point-min))
+	(insert param "=\"")
+	(goto-char (point-max))
+	(insert "\""))
+       (t
+	(goto-char (point-min))
+	(insert param "=")))
+      (buffer-string))))
+
 (provide 'rfc2231)
 
 ;;; rfc2231.el ends here