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-rw-r--r--third_party/lisp/s-xml/examples/tracer.lisp57
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diff --git a/third_party/lisp/s-xml/examples/tracer.lisp b/third_party/lisp/s-xml/examples/tracer.lisp
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--- a/third_party/lisp/s-xml/examples/tracer.lisp
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-;;;; -*- mode: lisp -*-
-;;;;
-;;;; $Id: tracer.lisp,v 1.2 2004/06/11 11:14:43 scaekenberghe Exp $
-;;;;
-;;;; A simple SSAX tracer example that can be used to understand how the hooks are called
-;;;;
-;;;; Copyright (C) 2004 Sven Van Caekenberghe, Beta Nine BVBA.
-;;;;
-;;;; You are granted the rights to distribute and use this software
-;;;; as governed by the terms of the Lisp Lesser General Public License
-;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
-
-(in-package :s-xml)
-
-(defun trace-xml-log (level msg &rest args)
-  (indent *standard-output* level)
-  (apply #'format *standard-output* msg args)
-  (terpri *standard-output*))
-
-(defun trace-xml-new-element-hook (name attributes seed)
-  (let ((new-seed (cons (1+ (car seed)) (1+ (cdr seed)))))
-    (trace-xml-log (car seed) 
-                   "(new-element :name ~s :attributes ~:[()~;~:*~s~] :seed ~s) => ~s" 
-                   name attributes seed new-seed)
-    new-seed))
-
-(defun trace-xml-finish-element-hook (name attributes parent-seed seed)
-  (let ((new-seed (cons (1- (car seed)) (1+ (cdr seed)))))
-    (trace-xml-log (car parent-seed)
-                   "(finish-element :name ~s :attributes ~:[()~;~:*~s~] :parent-seed ~s :seed ~s) => ~s" 
-                   name attributes parent-seed seed new-seed)
-    new-seed))
-
-(defun trace-xml-text-hook (string seed)
-  (let ((new-seed (cons (car seed) (1+ (cdr seed)))))
-    (trace-xml-log (car seed) 
-                   "(text :string ~s :seed ~s) => ~s" 
-                   string seed new-seed)
-    new-seed))
-
-(defun trace-xml (in)
-  "Parse and trace a toplevel XML element from stream in"
-  (start-parse-xml in
-		   (make-instance 'xml-parser-state
-				  :seed (cons 0 0) 
-                                  ;; seed car is xml element nesting level
-                                  ;; seed cdr is ever increasing from element to element
-				  :new-element-hook #'trace-xml-new-element-hook
-                                  :finish-element-hook #'trace-xml-finish-element-hook
-				  :text-hook #'trace-xml-text-hook)))
-
-(defun trace-xml-file (pathname)
-  "Parse and trace XMl from the file at pathname"
-  (with-open-file (in pathname)
-    (trace-xml in)))
-
-;;;; eof