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xanadu directory

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erana 2012-01-20 21:59:49 +09:00
parent f12c71f4c9
commit 51a96d60fd
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Copyright (C) 2011-2012 Johan Ceuppens

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xanadu : Xanadu file system

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version 0.1
* preliminary methods

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This is a xanadu system.

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;;; scganadu.scm - a Xanadu file system (until desktop publishing)
;;;
;;; Copyright (c) 2011-2012 Johan Ceuppens
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;; 3. The name of the authors may not be used to endorse or promote products
;;; derived from this software without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
;;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
;;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
;;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
;;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
;;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
;;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
;;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;; This code fabricates xanadu hypertext files to attach
;; to xanandu objects or use as metafiles
(load "scgameutil.scm")
(load "scganaduutil.scm")
(define (make-scganadu)
(let ((record (delay #f)))
(define (add-file filename)
(let ((displayproc (write (((FILE-MAKER-unit (force record)) 'get-post-html)
(string-append "<filename>"
filename
"</filename>"))))
(with-output-to-file (string-append "." filename ".scganadu") displayproc)
)))
(define (attach-to-file! filename)
(let ((displayproc (write (((FILE-MAKER-unit (force record)) 'get-post-html)
(string-append "<filename>"
filename
"</filename>")))))
(with-output-to-file filename displayproc)
))
(define (dispatch msg)
(lambda (msg)
(cond ((eq? msg 'add-file)add-file)
((eq? msg 'attach-to-file!)attach-to-file!)
(else (aspecterror) (display "make-scganadu")))))
(define :scganadu-record
(make-record-type 'scganadu-record
'(FILE-MAKER make-scganadu)))
(define make-scganadu-record
(record-constructor :scganadu-record
'(FILE-MAKER make-scganadu)))
(define FILE-MAKER-unit (record-accessor :scganadu-record 'FILE-MAKER))
(define make-scganadu-unit (record-accessor :scganadu-record 'make-scganadu))
(define make-scganadu-record
(delay (make-copy-of-document))
(delay (make-cell dispatch)))
(set! record make-scganadu-record)
dispatch))
;; interface
(define scganadu (make-scganadu))
;; FIXME (define X (make-scganadu1))
(define (scganadu-add-file X filename) ((X 'add-file) filename))
(define (scganadu-attach-to-file! X filename) ((X 'attach-to-file! filename)))

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;;; scganaduutil.scm - a scheme Xanadu utility
;;;
;;; Copyright (c) 2011-2012 Johan Ceuppens
;;;
;;; All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; 1. Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; 2. Redistributions in binary form must reproduce the above copyright
;;; notice, this list of conditions and the following disclaimer in the
;;; documentation and/or other materials provided with the distribution.
;;; 3. The name of the authors may not be used to endorse or promote products
;;; derived from this software without specific prior written permission.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
;;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
;;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
;;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
;;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
;;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
;;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
;;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
(define (aspecterror)
(display "::error:: Message not understood."))
(define (aspectmsg)
(display "::message:: "))
;; FIX : use scsh regexp instead of these following 2 functions
(define (string-cat s j)
(if (< j (string-length s))
(begin
(display j)
(string-append (string (string-ref s j)) (string-cat s (+ j 1)))
)
""))
(define (substring? needle haystack j)
;; (define (max? s1 s2 j)
(if (and (string? haystack)(string? needle))
(let ((hs (string-cat haystack j)))
(if (string<=? needle hs)
hs
#f))
#f))
(define (make-copy-of-document)
(let ((*XMLOPENDATA (list "<scganadu>" "<audio>" "<image>"))
(*XMLCLOSEDATA (list "</scganadu>" "</audio>" "</image>"))
(*scganadutag! car)
(*audiotag! cadr)
(*imagetag! caadr)
)
(define (get-open-xml tag)
(tag *XMLOPENDATA))
(define (get-close-xml tag)
(tag *XMLCLOSEDATA))
(define (get-copyright)
"Copyright (C) unknown by SCGanadu."))
(define (get-post hypertext)
(get-post-html hypertext))
(define (get-post-html hypertext)
(string-append (get-open-xml scganadutag!) hypertext (get-open-xml scganadutag!))
(define (get-post-sound hypertext2)
(get-post-html (string (get-open-xml audiotag!) hypertext2 (get-close-xml audiotag!))))
(define (get-post-image hypertext3)
(get-post-html (string (get-open-xml imagetag!) hypertext3 (get-close-xml imagetag!))))
(lambda (msg)
(cond ((eq? msg 'get-copyright)
get-copyright)
((eq? msg 'get-post-sound)
get-post-sound)
((eq? msg 'get-post-image)
get-post-image)
((eq? msg 'get-post-scganadu)
get-post-scganadu)
((eq? msg 'get-post)
get-post)
(else (aspecterror) (display "make-copy-of-document")))))