+;;; @ Entity Representation and Implementation
+;;;
+
+(defsubst mime-find-function (service type)
+ (let ((imps (cdr (assq type mime-entity-implementation-alist))))
+ (if imps
+ (cdr (assq service imps))
+ (require (intern (format "mm%s" type)))
+ (cdr (assq service
+ (cdr (assq type mime-entity-implementation-alist))))
+ )))
+
+(defsubst mime-entity-function (entity service)
+ (mime-find-function service
+ (mime-entity-representation-type-internal entity)))
+
+(defsubst mime-entity-send (entity service &rest args)
+ (apply (mime-find-function
+ service (mime-entity-representation-type-internal entity))
+ entity
+ args))
+
+(defsubst mm-arglist-to-arguments (arglist)
+ (let (dest)
+ (while arglist
+ (let ((arg (car arglist)))
+ (or (memq arg '(&optional &rest))
+ (setq dest (cons arg dest)))
+ )
+ (setq arglist (cdr arglist)))
+ (nreverse dest)))
+
+(defmacro mm-define-generic (name args &optional doc)
+ (if doc
+ `(defun ,(intern (format "mime-%s" name)) ,args
+ ,doc
+ (mime-entity-send ,(car args) ',name
+ ,@(mm-arglist-to-arguments (cdr args)))
+ )
+ `(defun ,(intern (format "mime-%s" name)) ,args
+ (mime-entity-send ,(car args) ',name
+ ,@(mm-arglist-to-arguments (cdr args)))
+ )))
+
+(put 'mm-define-generic 'lisp-indent-function 'defun)
+
+(defun mime-open-entity (type location)
+ "Open an entity and return it.
+TYPE is representation-type.
+LOCATION is location of entity. Specification of it is depended on
+representation-type."
+ (let ((entity (make-mime-entity-internal type location)))
+ (mime-entity-send entity 'initialize-instance)
+ entity))
+
+(mm-define-generic entity-cooked-p (entity)
+ "Return non-nil if contents of ENTITY has been already code-converted.")
+
+