437efa7686
Checked in the sources for this because it is tracked upstream in CVS and I can't be bothered to deal with that right now.
57 lines
2.2 KiB
Common Lisp
57 lines
2.2 KiB
Common Lisp
;;;; -*- mode: lisp -*-
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;;;;
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;;;; $Id: tracer.lisp,v 1.2 2004/06/11 11:14:43 scaekenberghe Exp $
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;;;;
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;;;; A simple SSAX tracer example that can be used to understand how the hooks are called
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;;;;
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;;;; Copyright (C) 2004 Sven Van Caekenberghe, Beta Nine BVBA.
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;;;;
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;;;; You are granted the rights to distribute and use this software
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;;;; as governed by the terms of the Lisp Lesser General Public License
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;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
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(in-package :s-xml)
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(defun trace-xml-log (level msg &rest args)
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(indent *standard-output* level)
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(apply #'format *standard-output* msg args)
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(terpri *standard-output*))
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(defun trace-xml-new-element-hook (name attributes seed)
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(let ((new-seed (cons (1+ (car seed)) (1+ (cdr seed)))))
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(trace-xml-log (car seed)
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"(new-element :name ~s :attributes ~:[()~;~:*~s~] :seed ~s) => ~s"
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name attributes seed new-seed)
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new-seed))
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(defun trace-xml-finish-element-hook (name attributes parent-seed seed)
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(let ((new-seed (cons (1- (car seed)) (1+ (cdr seed)))))
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(trace-xml-log (car parent-seed)
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"(finish-element :name ~s :attributes ~:[()~;~:*~s~] :parent-seed ~s :seed ~s) => ~s"
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name attributes parent-seed seed new-seed)
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new-seed))
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(defun trace-xml-text-hook (string seed)
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(let ((new-seed (cons (car seed) (1+ (cdr seed)))))
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(trace-xml-log (car seed)
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"(text :string ~s :seed ~s) => ~s"
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string seed new-seed)
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new-seed))
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(defun trace-xml (in)
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"Parse and trace a toplevel XML element from stream in"
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(start-parse-xml in
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(make-instance 'xml-parser-state
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:seed (cons 0 0)
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;; seed car is xml element nesting level
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;; seed cdr is ever increasing from element to element
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:new-element-hook #'trace-xml-new-element-hook
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:finish-element-hook #'trace-xml-finish-element-hook
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:text-hook #'trace-xml-text-hook)))
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(defun trace-xml-file (pathname)
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"Parse and trace XMl from the file at pathname"
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(with-open-file (in pathname)
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(trace-xml in)))
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;;;; eof
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