(put-alist, del-alist): New function; copied from tl-list.el.

(put-fields, field-unifier-for-default, field-unifier-for-mode,
field-unify, assoc-unify, get-unified-alist, delete-atype,
remove-atype, replace-atype, set-atype): New function; copied from
tl-atype.el.
Don't require tl-atype.

diff --git a/mime-play.el b/mime-play.el
index 3d0d3be..9863aa2 100644 (file)
--- a/mime-play.el
+++ b/mime-play.el
@@ -5,7 +5,7 @@
 ;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
 ;; Created: 1995/9/26 (separated from tm-view.el)
 ;;     Renamed: 1997/2/21 from tm-play.el
-;; Version: $Id: mime-play.el,v 0.2 1997-02-24 10:00:50 tmorioka Exp $
+;; Version: $Id: mime-play.el,v 0.3 1997-02-27 08:34:21 tmorioka Exp $
 ;; Keywords: mail, news, MIME, multimedia
 
 ;; This file is part of SEMI (SEMI is Emacs MIME Interfaces).
@@ -28,7 +28,6 @@
 ;;; Code:
 
 (require 'mime-view)
-(require 'tl-atype)
 
   
 ;;; @ content decoder
@@ -93,6 +92,78 @@
       )
     ))
 
+
+;;; @ method selector
+;;;
+
+;;; @@ alist
+;;;
+
+(defun put-alist (item value alist)
+  "Modify ALIST to set VALUE to ITEM.
+If there is a pair whose car is ITEM, replace its cdr by VALUE.
+If there is not such pair, create new pair (ITEM . VALUE) and
+return new alist whose car is the new pair and cdr is ALIST.
+\[tomo's ELIS like function]"
+  (let ((pair (assoc item alist)))
+    (if pair
+       (progn
+         (setcdr pair value)
+         alist)
+      (cons (cons item value) alist)
+      )))
+
+(defun del-alist (item alist)
+  "If there is a pair whose key is ITEM, delete it from ALIST.
+\[tomo's ELIS emulating function]"
+  (if (equal item (car (car alist)))
+      (cdr alist)
+    (let ((pr alist)
+         (r (cdr alist))
+         )
+      (catch 'tag
+       (while (not (null r))
+         (if (equal item (car (car r)))
+             (progn
+               (rplacd pr (cdr r))
+               (throw 'tag alist)))
+         (setq pr r)
+         (setq r (cdr r))
+         )
+       alist))))
+
+
+;;; @@ field
+;;;
+
+(defun put-fields (tp c)
+  (catch 'tag
+    (let ((r tp) f ret)
+      (while r
+       (setq f (car r))
+       (if (not (if (setq ret (assoc (car f) c))
+                    (equal (cdr ret)(cdr f))
+                  (setq c (cons f c))
+                  ))
+           (throw 'tag 'error))
+       (setq r (cdr r))
+       ))
+    c))
+
+
+;;; @@ field unifier
+;;;
+
+(defun field-unifier-for-default (a b)
+  (let ((ret
+        (cond ((equal a b)    a)
+              ((null (cdr b)) a)
+              ((null (cdr a)) b)
+              )))
+    (if ret
+       (list nil ret nil)
+      )))
+
 (defun field-unifier-for-mode (a b)
   (let ((va (cdr a)))
     (if (if (consp va)
@@ -102,6 +173,140 @@
        (list nil b nil)
       )))
 
+(defun field-unify (a b)
+  (let ((sym (intern (concat "field-unifier-for-" (intern (car a))))))
+    (if (not (fboundp sym))
+       (setq sym (function field-unifier-for-default))
+      )
+    (funcall sym a b)
+    ))
+
+
+;;; @@ type unifier
+;;;
+
+(defun assoc-unify (class instance)
+  (catch 'tag
+    (let ((cla (copy-alist class))
+         (ins (copy-alist instance))
+         (r class)
+         cell aret ret prev rest)
+      (while r
+       (setq cell (car r))
+       (setq aret (assoc (car cell) ins))
+       (if aret
+           (if (setq ret (field-unify cell aret))
+               (progn
+                 (if (car ret)
+                     (setq prev (put-alist (car (car ret))
+                                           (cdr (car ret))
+                                           prev))
+                   )
+                 (if (nth 2 ret)
+                     (setq rest (put-alist (car (nth 2 ret))
+                                           (cdr (nth 2 ret))
+                                           rest))
+                   )
+                 (setq cla (put-alist (car cell)(cdr (nth 1 ret)) cla))
+                 (setq ins (del-alist (car cell) ins))
+                 )
+             (throw 'tag nil)
+             ))
+       (setq r (cdr r))
+       )
+      (setq r (copy-alist ins))
+      (while r
+       (setq cell (car r))
+       (setq aret (assoc (car cell) cla))
+       (if aret
+           (if (setq ret (field-unify cell aret))
+               (progn
+                 (if (car ret)
+                     (setq prev (put-alist (car (car ret))
+                                           (cdr (car ret))
+                                           prev))
+                   )
+                 (if (nth 2 ret)
+                     (setq rest (put-alist (car (nth 2 ret))
+                                           (cdr (nth 2 ret))
+                                           rest))
+                   )
+                 (setq cla (del-alist (car cell) cla))
+                 (setq ins (put-alist (car cell)(cdr (nth 1 ret)) ins))
+                 )
+             (throw 'tag nil)
+             ))
+       (setq r (cdr r))
+       )
+      (list prev (append cla ins) rest)
+      )))
+
+(defun get-unified-alist (db al)
+  (let ((r db) ret)
+    (catch 'tag
+      (while r
+       (if (setq ret (nth 1 (assoc-unify (car r) al)))
+           (throw 'tag ret)
+         )
+       (setq r (cdr r))
+       ))))
+
+(defun delete-atype (atl al)
+  (let* ((r atl) ret oal)
+    (setq oal
+         (catch 'tag
+           (while r
+             (if (setq ret (nth 1 (assoc-unify (car r) al)))
+                 (throw 'tag (car r))
+               )
+             (setq r (cdr r))
+             )))
+    (delete oal atl)
+    ))
+
+(defun remove-atype (sym al)
+  (and (boundp sym)
+       (set sym (delete-atype (eval sym) al))
+       ))
+
+(defun replace-atype (atl old-al new-al)
+  (let* ((r atl) ret oal)
+    (if (catch 'tag
+         (while r
+           (if (setq ret (nth 1 (assoc-unify (car r) old-al)))
+               (throw 'tag (rplaca r new-al))
+             )
+           (setq r (cdr r))
+           ))
+       atl)))
+
+(defun set-atype (sym al &rest options)
+  (if (null (boundp sym))
+      (set sym al)
+    (let* ((replacement (memq 'replacement options))
+          (ignore-fields (car (cdr (memq 'ignore options))))
+          (remove (or (car (cdr (memq 'remove options)))
+                      (let ((ral (copy-alist al)))
+                        (mapcar (function
+                                 (lambda (type)
+                                   (setq ral (del-alist type ral))
+                                   ))
+                                ignore-fields)
+                        ral)))
+          )
+      (set sym
+          (or (if replacement
+                  (replace-atype (eval sym) remove al)
+                )
+              (cons al
+                    (delete-atype (eval sym) remove)
+                    )
+              )))))
+
+
+;;; @@ main selector
+;;;
+
 (defun mime/get-content-decoding-alist (al)
   (get-unified-alist mime/content-decoding-condition al)
   )