;;;;
;;;; f i l e e v e n t . s t k 		-- Implement the Tk fileevent commeand
;;;;					   in term of when-port-{read|writ}able
;;;;					   For backward compatibility ...
;;;;
;;;;
;;;; Copyright © 1993-1996 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
;;;; 
;;;; Permission to use, copy, and/or distribute this software and its
;;;; documentation for any purpose and without fee is hereby granted, provided
;;;; that both the above copyright notice and this permission notice appear in
;;;; all copies and derived works.  Fees for distribution or use of this
;;;; software or derived works may only be charged with express written
;;;; permission of the copyright holder.  
;;;; This software is provided ``as is'' without express or implied warranty.
;;;;
;;;;           Author: Erick Gallesio [eg@unice.fr]
;;;;    Creation date: 16-Jun-1996 22:37
;;;; Last file update: 25-Jun-1996 00:07


(define (fileevent file mode . script)
  (define (err)
    (error "fileeevent: bad mode specification ~S.\n(Note: fileevent is obsolete; use when-port-readable or when-port-writable)" mode))
    
  (let ((smode (& mode))
	(fct   #f))
    (cond 
       ((equal? smode "readable") (set! fct when-port-readable))
       ((equal? smode "writable") (set! fct when-port-writable))
       (ELSE 			  (err)))
    (if (null? script)
	(fct file)
	(let ((s (car script)))
	  (cond 
	   ((procedure? s)    (fct file s))
	   ((string? s)       (if (string=? s "") (fct file #f) (err)))
	   (ELSE	      (err)))))))