stk/Lib/base64.stk

;;;; b a s e 6 4 . s t k 				-- Base 64 support
;;;;
;;;; Copyright <20> 1998-1999 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
;;;; 
;;;; Permission to use, copy, modify, distribute,and license this
;;;; software and its documentation for any purpose is hereby granted,
;;;; provided that existing copyright notices are retained in all
;;;; copies and that this notice is included verbatim in any
;;;; distributions.  No written agreement, license, or royalty fee is
;;;; required for any of the authorized uses.
;;;; This software is provided ``AS IS'' without express or implied
;;;; warranty.
;;;;
;;;;           Author: Erick Gallesio [eg@unice.fr]
;;;;    Creation date: 20-Jul-1998 18:43
;;;; Last file update:  3-Sep-1999 19:49 (eg)


(if (symbol-bound? '%init-base64)
    ;; Html module is in the core interpreter
    (%init-base64)
    ;; Try to load hash table dynamically
    (load (string-append "base64." *shared-suffix*)))


;;;
;;; Public procedures 
;;; 
(define base64-encode-string #f)
(define base64-decode-string #f)


;;;
;;; Impl.
;;;
(let ((encode/decode (lambda (op)
		       (lambda (str)
			 (let ((in  (open-input-string str))
			       (out (open-output-string)))
			   (op in out)
			   (get-output-string out))))))

  (set! base64-encode-string (encode/decode base64-encode))
  (set! base64-decode-string (encode/decode base64-decode)))

(provide "base64")