New package HAX.

* closure-common.asd: Added hax.lisp

	* hax.lisp: New.

closure-common.asd

@@ -53,5 +53,5 @@
      #-x&y-streams-are-stream (:file "xstream")
      #-x&y-streams-are-stream (:file "ystream")
      #+x&y-streams-are-stream (:file #+scl "stream-scl")
-     )
+     (:file "hax"))
     :depends-on (#-scl :trivial-gray-streams))

hax.lisp

@@ -0,0 +1,131 @@
+;;; -*- show-trailing-whitespace: t; indent-tabs: nil -*-
+;;; ---------------------------------------------------------------------------
+;;;     Title: An event API for the HTML parser, inspired by SAX
+;;;   Created: 2007-10-14
+;;;    Author: David Lichteblau
+;;;   License: BSD
+;;; ---------------------------------------------------------------------------
+;;;  (c) copyright 2005,2007 David Lichteblau
+
+;;; 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
+;;;                                                                   
+;;; THIS  SOFTWARE   IS PROVIDED ``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 AUTHOR OR CONTRIBUTORS 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.
+
+(defpackage :hax
+  (:use :common-lisp)
+  (:export #:abstract-handler
+	   #:default-handler
+           
+	   #:make-attribute
+	   #:standard-attribute
+           #:find-attribute
+           #:attribute-name
+           #:attribute-value
+           #:attribute-specified-p
+	   
+           #:start-document
+           #:start-element
+           #:characters
+           #:end-element
+           #:end-document
+           #:comment))
+
+(in-package :hax)
+
+
+;;;; ATTRIBUTE
+
+(defgeneric attribute-name (attribute))
+(defgeneric attribute-value (attribute))
+(defgeneric attribute-specified-p (attribute))
+
+(defclass standard-attribute ()
+  ((name :initarg :name :accessor attribute-name)
+   (value :initarg :value :accessor attribute-value)
+   (specified-p :initarg :specified-p :accessor attribute-specified-p)))
+
+(defun make-attribute (name value &optional (specified-p t))
+  (make-instance 'standard-attribute
+                 :name name
+                 :value value
+                 :specified-p specified-p))
+
+(defun %rod= (x y)
+  ;; allow rods *and* strings *and* null
+  (cond
+    ((zerop (length x)) (zerop (length y)))
+    ((zerop (length y)) nil)
+    ((stringp x) (string= x y))
+    (t (runes:rod= x y))))
+
+(defun find-attribute (name attrs)
+  (find name attrs :key #'attribute-name :test #'%rod=))
+
+
+;;;; ABSTRACT-HANDLER and DEFAULT-HANDLER
+
+(defclass abstract-handler () ())
+(defclass default-handler (abstract-handler) ())
+
+(defgeneric start-document (handler name public-id system-id)
+  (:method ((handler null) name public-id system-id)
+    (declare (ignore name public-id system-id))
+    nil)
+  (:method ((handler default-handler) name public-id system-id)
+    (declare (ignore name public-id system-id))
+    nil))
+
+(defgeneric start-element (handler name attributes)
+  (:method ((handler null) name attributes)
+    (declare (ignore name attributes))
+    nil)
+  (:method ((handler default-handler) name attributes)
+    (declare (ignore name attributes))
+    nil))
+
+(defgeneric characters (handler data)
+  (:method ((handler null) data)
+    (declare (ignore data))
+    nil)
+  (:method ((handler default-handler) data)
+    (declare (ignore data))
+    nil))
+
+(defgeneric end-element (handler name)
+  (:method ((handler null) name)
+    (declare (ignore name))
+    nil)
+  (:method ((handler default-handler) name)
+    (declare (ignore name))
+    nil))
+
+(defgeneric end-document (handler)
+  (:method ((handler null)) nil)
+  (:method ((handler default-handler)) nil))
+
+(defgeneric comment (handler data)
+  (:method ((handler null) data)
+    (declare (ignore data))
+    nil)
+  (:method ((handler default-handler) data)
+    (declare (ignore data))
+    nil))