Function: mailcap-unescape-mime-test

mailcap-unescape-mime-test is a byte-compiled function defined in mailcap.el.gz.

Signature

(mailcap-unescape-mime-test TEST TYPE-INFO)

Source Code

;; Defined in /usr/src/emacs/lisp/net/mailcap.el.gz
(defun mailcap-unescape-mime-test (test type-info)
  (let (save-pos save-chr subst)
    (cond
     ((symbolp test) test)
     ((and (listp test) (symbolp (car test))) test)
     ((or (stringp test)
	  (and (listp test) (stringp (car test))
	       (setq test (mapconcat #'identity test " "))))
      (with-temp-buffer
	(insert test)
	(goto-char (point-min))
	(while (not (eobp))
	  (skip-chars-forward "^%")
	  (if (/= (- (point)
		     (progn (skip-chars-backward "\\\\")
			    (point)))
		  0)			; It is an escaped %
	      (progn
		(delete-char 1)
		(skip-chars-forward "%."))
	    (setq save-pos (point))
	    (skip-chars-forward "%")
	    (setq save-chr (char-after (point)))
	    ;; Escapes:
	    ;; %s: name of a file for the body data
	    ;; %t: content-type
	    ;; %{<parameter name}: value of parameter in mailcap entry
	    ;; %n: number of sub-parts for multipart content-type
	    ;; %F: a set of content-type/filename pairs for multiparts
	    (cond
	     ((null save-chr) nil)
	     ((= save-chr ?t)
	      (delete-region save-pos (progn (forward-char 1) (point)))
	      (insert (or (cdr (assq 'type type-info)) "\"\"")))
	     ((memq save-chr '(?M ?n ?F))
	      (delete-region save-pos (progn (forward-char 1) (point)))
	      (insert "\"\""))
	     ((= save-chr ?{)
	      (forward-char 1)
	      (skip-chars-forward "^}")
	      (downcase-region (+ 2 save-pos) (point))
	      (setq subst (buffer-substring (+ 2 save-pos) (point)))
	      (delete-region save-pos (1+ (point)))
	      (insert (or (cdr (assoc subst type-info)) "\"\"")))
	     (t nil))))
	(buffer-string)))
     (t (error "Bad value to mailcap-unescape-mime-test: %s" test)))))