;;; mmbuffer.el --- MIME entity module for binary buffer

;; Copyright (C) 1998 Free Software Foundation, Inc.

;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Keywords: MIME, multimedia, mail, news

;; This file is part of FLIM (Faithful Library about Internet Message).

;; 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 'mmgeneric)

(mm-define-backend buffer (generic))

(mm-define-method initialize-instance ((entity buffer))
  (mime-entity-set-buffer-internal
   entity (mime-entity-location-internal entity))
  (save-excursion
    (set-buffer (mime-entity-buffer-internal entity))
    (setq mime-message-structure entity)
    (let ((header-start (point-min))
	  header-end
	  body-start
	  (body-end (point-max)))
      (goto-char header-start)
      (if (re-search-forward "^$" nil t)
	  (setq header-end (match-end 0)
		body-start (if (= header-end body-end)
			       body-end
			     (1+ header-end)))
	(setq header-end (point-min)
	      body-start (point-min)))
      (save-restriction
	(narrow-to-region header-start header-end)
	(mime-entity-set-content-type-internal
	 entity
	 (let ((str (std11-fetch-field "Content-Type")))
	   (if str
	       (mime-parse-Content-Type str)
	     )))
	)
      (mime-entity-set-header-start-internal entity header-start)
      (mime-entity-set-header-end-internal entity header-end)
      (mime-entity-set-body-start-internal entity body-start)
      (mime-entity-set-body-end-internal entity body-end)
      )))

;;; redefine to speed up

(mm-define-method entity-point-min ((entity buffer))
  (mime-entity-header-start-internal entity))

(mm-define-method entity-point-max ((entity buffer))
  (mime-entity-body-end-internal entity))

(mm-define-method fetch-field ((entity buffer) field-name)
  (save-excursion
    (set-buffer (mime-entity-buffer-internal entity))
    (save-restriction
      (narrow-to-region (mime-entity-header-start-internal entity)
			(mime-entity-header-end-internal entity))
      (std11-fetch-field field-name)
      )))

(mm-define-method entity-content ((entity buffer))
  (save-excursion
    (set-buffer (mime-entity-buffer-internal entity))
    (mime-decode-string
     (buffer-substring (mime-entity-body-start-internal entity)
		       (mime-entity-body-end-internal entity))
     (mime-entity-encoding entity))))

(mm-define-method write-entity-content ((entity buffer) filename)
  (save-excursion
    (set-buffer (mime-entity-buffer-internal entity))
    (mime-write-decoded-region (mime-entity-body-start-internal entity)
			       (mime-entity-body-end-internal entity)
			       filename
			       (or (mime-entity-encoding entity) "7bit"))
    ))

(mm-define-method write-entity ((entity buffer) filename)
  (save-excursion
    (set-buffer (mime-entity-buffer-internal entity))
    (write-region-as-raw-text-CRLF (mime-entity-header-start-internal entity)
				   (mime-entity-body-end-internal entity)
				   filename)
    ))

(mm-define-method write-entity-body ((entity buffer) filename)
  (save-excursion
    (set-buffer (mime-entity-buffer-internal entity))
    (write-region-as-binary (mime-entity-body-start-internal entity)
			    (mime-entity-body-end-internal entity)
			    filename)
    ))


;;; @ end
;;;

(provide 'mmbuffer)

;;; mmbuffer.el ends here