58 lines
2.6 KiB
Scheme
58 lines
2.6 KiB
Scheme
;;; xml.scm - a simple scheme XML library
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;;;
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;;; Copyright (c) 2012 Johan Ceuppens
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;;;
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;;; All rights reserved.
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;;;
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;;; Redistribution and use in source and binary forms, with or without
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;;; modification, are permitted provided that the following conditions
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;;; are met:
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;;; 1. Redistributions of source code must retain the above copyright
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;;; notice, this list of conditions and the following disclaimer.
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;;; 2. Redistributions in binary form must reproduce the above copyright
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;;; notice, this list of conditions and the following disclaimer in the
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;;; documentation and/or other materials provided with the distribution.
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;;; 3. The name of the authors may not be used to endorse or promote products
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;;; derived from this software without specific prior written permission.
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;;;
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;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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;;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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;;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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;;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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;;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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;;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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;;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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;;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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(define (xml-load-tree! filename)
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(let ((in (open-input-file filename))
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(contents ""))
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(define (tagify! c tagged)
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(cond ((> tagged 0) "")
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((= tagged 0) (if (eq? c #\>) "" (string c)))
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;; FIXME make node, descend one level
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(else "")))
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(define (xml-read-in-file contents)
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(let ((tagged 0))
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(do ((c (read-char in) (read-char in)))
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((eof-object? c) contents)
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(cond ((and (= tagged 0)(eq? c #\<))
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(set! tagged (+ tagged 1)))
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((and (> tagged 0)(eq? c #\<))
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(set! tagged (+ tagged 1)))
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((and (= tagged 0)(eq? c #\>))
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(set! tagged (- tagged 1)))
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((and (> tagged 0)(eq? c #\>))
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(set! tagged (- tagged 1)))
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((< tagged 0)
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(display "xml : bad xml file - broken tags.")(newline)
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(set! tagged 0))
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)
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(set! contents (string-append contents (tagify! c tagged))))))
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(xml-read-in-file contents)))
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