(mail-header-references): Use `mime-fetch-field' and

`mail-header-entity'.
(mail-header-set-references): Use `mail-header-set-field'.
Define mm-backend `nil' and its method `fetch-field'.
(make-full-mail-header): Modify data structure to store References to
mime-entity.

diff --git a/lisp/nnheader.el b/lisp/nnheader.el
index 2bde578..e73ee07 100644 (file)
--- a/lisp/nnheader.el
+++ b/lisp/nnheader.el
@@ -1,9 +1,10 @@
-;;; nnheader.el --- header access macros for Gnus and its backends
+;;; nnheader.el --- header access macros for Semi-gnus and its backends
 ;; Copyright (C) 1987,88,89,90,93,94,95,96,97,98 Free Software Foundation, Inc.
 
 ;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
-;;     Lars Magne Ingebrigtsen <larsi@gnus.org>
-;; Keywords: news
+;;         Lars Magne Ingebrigtsen <larsi@gnus.org>
+;;         MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Keywords: mail, news, MIME
 
 ;; This file is part of GNU Emacs.
 
@@ -40,6 +41,7 @@
 (eval-when-compile (require 'cl))
 
 (require 'mail-utils)
+(require 'mime)
 
 (defvar nnheader-max-head-length 4096
   "*Max length of the head of articles.")
@@ -134,11 +136,11 @@ on your system, you could say something like:
 
 (defmacro mail-header-references (header)
   "Return references in HEADER."
-  `(aref ,header 5))
+  `(mime-fetch-field 'References (mail-header-entity ,header)))
 
 (defmacro mail-header-set-references (header ref)
   "Set article references of HEADER to REF."
-  `(aset ,header 5 ,ref))
+  `(mail-header-set-field ,header 'References ,ref))
 
 (defmacro mail-header-chars (header)
   "Return number of chars of article in HEADER."
@@ -164,6 +166,10 @@ on your system, you could say something like:
   "Set article xref of HEADER to xref."
   `(aset ,header 8 ,xref))
 
+(mm-define-backend nil)
+
+(mm-define-method fetch-field ((entity nil) field-name))
+
 (defun make-full-mail-header (&optional number subject from date id
                                        references chars lines xref)
   "Create a new mail header structure initialized with the parameters given."
@@ -171,11 +177,14 @@ on your system, you could say something like:
     (mime-entity-set-original-header-internal
      entity
      (list (cons 'Date date)
-          (cons 'Message-Id id)))
+          (cons 'Message-Id id)
+          (cons 'References references)
+          ))
     (mime-entity-set-parsed-header-internal
      entity
      (list (cons 'Subject subject)
-          (cons 'From from)))
+          (cons 'From from)
+          ))
     (vector number entity from date id references chars lines xref)
     ))