From: morioka <morioka>
Date: Wed, 17 Jun 1998 21:50:54 +0000 (+0000)
Subject: mime-parse.el was moved from SEMI layer.
X-Git-Tag: chao-1_3_0_9~5
X-Git-Url: http://git.chise.org/gitweb/?a=commitdiff_plain;h=8b7af6d3b6883d4b17d63b1725cbbeabaafc49fa;p=elisp%2Fflim.git

mime-parse.el was moved from SEMI layer.
---

diff --git a/FLIM-ELS b/FLIM-ELS
index e4b270c..a5a4034 100644
--- a/FLIM-ELS
+++ b/FLIM-ELS
@@ -8,7 +8,7 @@
 		     mime-def
 		     mel mel-dl mel-b mel-q mel-u mel-g
 		     eword-decode eword-encode
-		     mime-lib mailcap))
+		     mime-lib mime-parse mailcap))
 
 (if (fboundp 'dynamic-link)
     (setq flim-modules (cons 'mel-dl flim-modules))
diff --git a/mime-parse.el b/mime-parse.el
new file mode 100644
index 0000000..1350651
--- /dev/null
+++ b/mime-parse.el
@@ -0,0 +1,327 @@
+;;; mime-parse.el --- MIME message parser
+
+;; Copyright (C) 1994,1995,1996,1997,1998 Free Software Foundation, Inc.
+
+;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Keywords: parse, MIME, multimedia, mail, news
+
+;; This file is part of SEMI (Spadework for Emacs MIME Interfaces).
+
+;; 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 'std11)
+(require 'mime-def)
+
+
+;;; @ field parser
+;;;
+
+(defconst mime/content-parameter-value-regexp
+  (concat "\\("
+	  std11-quoted-string-regexp
+	  "\\|[^; \t\n]*\\)"))
+
+(defconst mime::parameter-regexp
+  (concat "^[ \t]*\;[ \t]*\\(" mime-token-regexp "\\)"
+	  "[ \t]*=[ \t]*\\(" mime/content-parameter-value-regexp "\\)"))
+
+(defun mime-parse-parameter (str)
+  (if (string-match mime::parameter-regexp str)
+      (let ((e (match-end 2)))
+	(cons
+	 (cons (downcase (substring str (match-beginning 1) (match-end 1)))
+	       (std11-strip-quoted-string
+		(substring str (match-beginning 2) e))
+	       )
+	 (substring str e)
+	 ))))
+
+
+;;; @ Content-Type
+;;;
+
+(defsubst make-mime-content-type (type subtype &optional parameters)
+  (list* (cons 'type type)
+	 (cons 'subtype subtype)
+	 (nreverse parameters))
+  )
+
+(defun mime-parse-Content-Type (string)
+  "Parse STRING as field-body of Content-Type field.
+Return value is
+    (PRIMARY-TYPE SUBTYPE (NAME1 . VALUE1)(NAME2 . VALUE2) ...)
+or nil.  PRIMARY-TYPE and SUBTYPE are symbol and NAME_n and VALUE_n
+are string."
+  (setq string (std11-unfold-string string))
+  (if (string-match `,(concat "^\\(" mime-token-regexp
+			      "\\)/\\(" mime-token-regexp "\\)") string)
+      (let* ((type (downcase
+		    (substring string (match-beginning 1) (match-end 1))))
+	     (subtype (downcase
+		       (substring string (match-beginning 2) (match-end 2))))
+	     ret dest)
+	(setq string (substring string (match-end 0)))
+	(while (setq ret (mime-parse-parameter string))
+	  (setq dest (cons (car ret) dest)
+		string (cdr ret))
+	  )
+	(make-mime-content-type (intern type)(intern subtype)
+				(nreverse dest))
+	)))
+
+(defun mime-read-Content-Type ()
+  "Read field-body of Content-Type field from current-buffer,
+and return parsed it.  Format of return value is as same as
+`mime-parse-Content-Type'."
+  (let ((str (std11-field-body "Content-Type")))
+    (if str
+	(mime-parse-Content-Type str)
+      )))
+
+(defsubst mime-content-type-primary-type (content-type)
+  "Return primary-type of CONTENT-TYPE."
+  (cdr (car content-type)))
+
+(defsubst mime-content-type-subtype (content-type)
+  "Return primary-type of CONTENT-TYPE."
+  (cdr (cadr content-type)))
+
+(defsubst mime-content-type-parameters (content-type)
+  "Return primary-type of CONTENT-TYPE."
+  (cddr content-type))
+
+(defsubst mime-content-type-parameter (content-type parameter)
+  "Return PARAMETER value of CONTENT-TYPE."
+  (cdr (assoc parameter (mime-content-type-parameters content-type))))
+
+
+;;; @ Content-Disposition
+;;;
+
+(defconst mime-disposition-type-regexp mime-token-regexp)
+
+(defun mime-parse-Content-Disposition (string)
+  "Parse STRING as field-body of Content-Disposition field."
+  (setq string (std11-unfold-string string))
+  (if (string-match `,(concat "^" mime-disposition-type-regexp) string)
+      (let* ((e (match-end 0))
+	     (type (downcase (substring string 0 e)))
+	     ret dest)
+	(setq string (substring string e))
+	(while (setq ret (mime-parse-parameter string))
+	  (setq dest (cons (car ret) dest)
+		string (cdr ret))
+	  )
+	(cons (cons 'type (intern type))
+	      (nreverse dest))
+	)))
+
+(defun mime-read-Content-Disposition ()
+  "Read field-body of Content-Disposition field from current-buffer,
+and return parsed it."
+  (let ((str (std11-field-body "Content-Disposition")))
+    (if str
+	(mime-parse-Content-Disposition str)
+      )))
+
+(defsubst mime-content-disposition-type (content-disposition)
+  "Return disposition-type of CONTENT-DISPOSITION."
+  (cdr (car content-disposition)))
+
+(defsubst mime-content-disposition-parameters (content-disposition)
+  "Return disposition-parameters of CONTENT-DISPOSITION."
+  (cdr content-disposition))
+
+(defsubst mime-content-disposition-parameter (content-disposition parameter)
+  "Return PARAMETER value of CONTENT-DISPOSITION."
+  (cdr (assoc parameter (cdr content-disposition))))
+
+(defsubst mime-content-disposition-filename (content-disposition)
+  "Return filename of CONTENT-DISPOSITION."
+  (mime-content-disposition-parameter content-disposition "filename"))
+
+
+;;; @ Content-Transfer-Encoding
+;;;
+
+(defun mime-parse-Content-Transfer-Encoding (string)
+  "Parse STRING as field-body of Content-Transfer-Encoding field."
+  (if (string-match "[ \t\n\r]+$" string)
+      (setq string (match-string 0 string))
+    )
+  (downcase string))
+
+(defun mime-read-Content-Transfer-Encoding (&optional default-encoding)
+  "Read field-body of Content-Transfer-Encoding field from
+current-buffer, and return it.
+If is is not found, return DEFAULT-ENCODING."
+  (let ((str (std11-field-body "Content-Transfer-Encoding")))
+    (if str
+	(mime-parse-Content-Transfer-Encoding str)
+      default-encoding)))
+
+
+;;; @ message parser
+;;;
+
+(defalias 'mime-entity-point-min 'mime-entity-header-start)
+(defalias 'mime-entity-point-max 'mime-entity-body-end)
+
+(defsubst mime-entity-media-type (entity)
+  (mime-content-type-primary-type (mime-entity-content-type entity)))
+(defsubst mime-entity-media-subtype (entity)
+  (mime-content-type-subtype (mime-entity-content-type entity)))
+(defsubst mime-entity-parameters (entity)
+  (mime-content-type-parameters (mime-entity-content-type entity)))
+
+(defsubst mime-entity-type/subtype (entity-info)
+  (mime-type/subtype-string (mime-entity-media-type entity-info)
+			    (mime-entity-media-subtype entity-info)))
+
+(defun mime-parse-multipart (header-start header-end body-start body-end
+					  content-type content-disposition
+					  encoding node-id)
+  (goto-char (point-min))
+  (let* ((dash-boundary
+	  (concat "--"
+		  (std11-strip-quoted-string
+		   (mime-content-type-parameter content-type "boundary"))))
+	 (delimiter       (concat "\n" (regexp-quote dash-boundary)))
+	 (close-delimiter (concat delimiter "--[ \t]*$"))
+	 (rsep (concat delimiter "[ \t]*\n"))
+	 (dc-ctl
+	  (if (eq (mime-content-type-subtype content-type) 'digest)
+	      (make-mime-content-type 'message 'rfc822)
+	    (make-mime-content-type 'text 'plain)
+	    ))
+	 cb ce ret ncb children (i 0))
+    (save-restriction
+      (goto-char body-end)
+      (narrow-to-region header-end
+			(if (re-search-backward close-delimiter nil t)
+			    (match-beginning 0)
+			  body-end))
+      (goto-char header-start)
+      (re-search-forward rsep nil t)
+      (setq cb (match-end 0))
+      (while (re-search-forward rsep nil t)
+	(setq ce (match-beginning 0))
+	(setq ncb (match-end 0))
+	(save-restriction
+	  (narrow-to-region cb ce)
+	  (setq ret (mime-parse-message dc-ctl "7bit" (cons i node-id)))
+	  )
+	(setq children (cons ret children))
+	(goto-char (mime-entity-point-max ret))
+	(goto-char (setq cb ncb))
+	(setq i (1+ i))
+	)
+      (setq ce (point-max))
+      (save-restriction
+	(narrow-to-region cb ce)
+	(setq ret (mime-parse-message dc-ctl "7bit" (cons i node-id)))
+	)
+      (setq children (cons ret children))
+      )
+    (make-mime-entity (current-buffer)
+		      header-start header-end body-start body-end
+		      node-id content-type content-disposition encoding
+		      (nreverse children))
+    ))
+
+(defun mime-parse-message (&optional default-ctl default-encoding node-id)
+  "Parse current-buffer as a MIME message.
+DEFAULT-CTL is used when an entity does not have valid Content-Type
+field.  Its format must be as same as return value of
+mime-{parse|read}-Content-Type."
+  (let ((header-start (point-min))
+	header-end
+	body-start
+	(body-end (point-max))
+	content-type content-disposition encoding
+	primary-type)
+    (goto-char header-start)
+    (if (re-search-forward "^$" nil t)
+	(setq header-end (match-end 0)
+	      body-start (1+ header-end))
+      (setq header-end (point-min)
+	    body-start (point-min))
+      )
+    (save-restriction
+      (narrow-to-region header-start header-end)
+      (setq content-type (or (let ((str (std11-fetch-field "Content-Type")))
+			       (if str
+				   (mime-parse-Content-Type str)
+				 ))
+			     default-ctl)
+	    content-disposition (let ((str (std11-fetch-field
+					    "Content-Disposition")))
+				  (if str
+				      (mime-parse-Content-Disposition str)
+				    ))
+	    encoding (let ((str (std11-fetch-field
+				 "Content-Transfer-Encoding")))
+		       (if str
+			   (mime-parse-Content-Transfer-Encoding str)
+			 default-encoding))
+	    primary-type (mime-content-type-primary-type content-type))
+      )
+    (cond ((eq primary-type 'multipart)
+	   (mime-parse-multipart header-start header-end
+				 body-start body-end
+				 content-type content-disposition encoding
+				 node-id)
+	   )
+	  ((and (eq primary-type 'message)
+		(memq (mime-content-type-subtype content-type)
+		      '(rfc822 news)
+		      ))
+           (make-mime-entity (current-buffer)
+			     header-start header-end body-start body-end
+			     node-id
+			     content-type content-disposition encoding
+			     (save-restriction
+			       (narrow-to-region body-start body-end)
+			       (list (mime-parse-message
+				      nil nil (cons 0 node-id)))
+			       ))
+	   )
+	  (t 
+           (make-mime-entity (current-buffer)
+			     header-start header-end body-start body-end
+			     node-id
+			     content-type content-disposition encoding nil)
+	   ))
+    ))
+
+
+;;; @ utilities
+;;;
+
+(defsubst mime-root-entity-p (entity)
+  "Return t if ENTITY is root-entity (message)."
+  (null (mime-entity-node-id entity)))
+
+
+;;; @ end
+;;;
+
+(provide 'mime-parse)
+
+;;; mime-parse.el ends here