xanadu directory

scsh/xanadu/AUTHORS

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+Copyright (C) 2011-2012 Johan Ceuppens

scsh/xanadu/BLURB

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+xanadu : Xanadu file system

scsh/xanadu/NEWS

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+version 0.1
+* preliminary methods  

scsh/xanadu/README

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+This is a xanadu system.

scsh/xanadu/scganadu.scm

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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)))

scsh/xanadu/scganaduutil.scm

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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")))))
+