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xanadu - xml

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erana 2012-01-20 23:36:06 +09:00
parent c7c079deb5
commit d02589b334
1 changed files with 56 additions and 0 deletions
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;;; xml.scm - a simple scheme XML library
;;;
;;; Copyright (c) 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 (xml-load-tree! filename)
(let ((in (open-input-file filename))
(contents ""))
(define (tagify! c tagged)
(cond ((= tagged 0) (string c))
((> tagged 0) "") ;; FIXME make node, descend one level
(else "")))
(define (xml-read-in-file contents)
(let ((tagged 0))
(do ((c (read-char in) (read-char in)))
((eof-object? c) contents)
(cond ((and (= tagged 0)(eq? c #\<))
(set! tagged (+ tagged 1)))
((and (> tagged 0)(eq? c #\<))
(set! tagged (+ tagged 1)))
((and (= tagged 0)(eq? c #\>))
(set! tagged (- tagged 1)))
((and (> tagged 0)(eq? c #\>))
(set! tagged (- tagged 1)))
((< tagged 0)
(display "xml : bad xml file - broken tags.")(newline)
(set! tagged 0))
)
(set! contents (string-append contents (tagify! c tagged))))))
(xml-read-in-file contents)))