r5062: return from san diego

[kmrcl.git] / xml-utils.lisp

diff --git a/xml-utils.lisp b/xml-utils.lisp
index 223b9c8afaa1817ef2fb7eda24c15a370c776bfd..acbf5b3d6e5e66bc5941776881527813ea01b40b 100644 (file)
--- a/xml-utils.lisp
+++ b/xml-utils.lisp
@@ -7,17 +7,16 @@
 ;;;; Programmer:    Kevin M. Rosenberg
 ;;;; Date Started:  Apr 2000
 ;;;;
-;;;; $Id: xml-utils.lisp,v 1.3 2002/10/09 14:24:47 kevin Exp $
+;;;; $Id: xml-utils.lisp,v 1.8 2003/06/06 21:59:30 kevin Exp $
 ;;;;
 ;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
 ;;;;
-;;;; Kmrcl users are granted the rights to distribute and use this software
-;;;; as governed by the terms of the GNU General Public License.
+;;;; KMRCL users are granted the rights to distribute and use this software
+;;;; as governed by the terms of the Lisp Lesser GNU Public License
+;;;; (http://opensource.franz.com/preamble.html), also known as the LLGPL.
 ;;;; *************************************************************************
 
-(in-package :kmrcl)
-
-(declaim (optimize (speed 3) (safety 1)))
+(in-package #:kmrcl)
 
 
 (defun wrap-with-xml (str entity)
@@ -28,12 +27,15 @@
 
 ;;; XML Extraction Functions
 
+#|
+#+allegro (require :pxml)
 #+allegro
 (defun parse-xml-no-ws (str)
   "Return list structure of XML string with removing whitespace strings"
   (remove-tree-if #'string-ws? (parse-xml str)))
+|#
 
-(defun positions-xml-tag-contents (tag xmlstr &optional (start-xmlstr 0) (end-xmlstr nil))
+(defun positions-xml-tag-contents-old (tag xmlstr &optional (start-xmlstr 0) (end-xmlstr nil))
   "Returns three values: the start and end positions of contents between
  the xml tags and the position following the close of the end tag."
   (let ((done nil)
@@ -49,7 +51,8 @@
             (if bracketpos
                 (let* ((starttag (1+ bracketpos))
                        (endtag (+ starttag taglen)))
-                  (if (string= tag xmlstr :start2 starttag :end2 endtag)
+                  (if (and (< endtag end-xmlstr)
+                           (string= tag xmlstr :start2 starttag :end2 endtag))
                       (let* ((char-after-tag (char xmlstr endtag)))
                         (declare (character char-after-tag))
                         (if (or (char= #\> char-after-tag) (char= #\space char-after-tag))
@@ -73,6 +76,75 @@
               (setq done t))))
     (values startpos endpos nextpos)))
 
+(defun find-start-tag (tag taglen xmlstr start-pos end-xmlstr)
+  (let ((bracketpos (position-char #\< xmlstr start-pos end-xmlstr)))
+    (when bracketpos
+      (let* ((starttag (1+ bracketpos))
+            (endtag (+ starttag taglen)))
+       (if (and (< endtag end-xmlstr)
+                (string= tag xmlstr :start2 starttag :end2 endtag))
+           (let* ((char-after-tag (char xmlstr endtag)))
+             (declare (character char-after-tag))
+             (if (or (char= #\> char-after-tag)
+                     (char= #\space char-after-tag))
+                 (progn
+                   (if (char= #\> char-after-tag) 
+                       (setq startpos (1+ endtag))
+                     (setq startpos (1+ (position-char #\> xmlstr (1+ endtag) end-xmlstr))))
+                   ))))))))
+
+(defun positions-xml-tag-contents (tag xmlstr &optional (start-xmlstr 0)
+                                      (end-xmlstr (length xmlstr)))
+  "Returns three values: the start and end positions of contents between
+ the xml tags and the position following the close of the end tag."
+  (let ((done nil)
+       (pos start-xmlstr)
+       (taglen (length tag))
+       (startpos nil)
+       (endpos nil)
+       (nextpos nil))
+    (while (not done)
+          (let ((bracketpos (position-char #\< xmlstr pos end-xmlstr)))
+            (unless bracketpos
+              (return-from positions-xml-tag-contents
+                (values nil nil nil)))
+            (let* ((starttag (1+ bracketpos))
+                   (endtag (+ starttag taglen)))
+              (if (and (< endtag end-xmlstr)
+                       (string= tag xmlstr :start2 starttag :end2 endtag))
+                  (let* ((char-after-tag (char xmlstr endtag)))
+                    (declare (character char-after-tag))
+                    (if (or (char= #\> char-after-tag)
+                            (char= #\space char-after-tag))
+                        (progn
+                          (if (char= #\> char-after-tag) 
+                              (setq startpos (1+ endtag))
+                            (setq startpos (1+ (position-char #\> xmlstr (1+ endtag) end-xmlstr))))
+                          (setq endpos (search (format nil "</~a>" tag) xmlstr
+                                               :start2 startpos :end2 end-xmlstr))
+                          (if (and startpos endpos)
+                              (progn
+                                (setq nextpos (+ endpos taglen 3))
+                                (setq pos nextpos))
+                            (setf startpos nil
+                                  endpos nil))
+                          (setq done t))
+                      (setq pos (1+ endtag))))
+                (setq pos (1+ starttag)))
+              (when (> pos end-xmlstr)
+                (setq done t))))))
+    (values startpos endpos nextpos)))
+
+
+(defun xml-tag-contents-old (tag xmlstr &optional (start-xmlstr 0) (end-xmlstr nil))
+  "Returns two values: the string between XML start and end tag 
+and position of character following end tag."
+  (multiple-value-bind 
+      (startpos endpos nextpos) 
+      (positions-xml-tag-contents-old tag xmlstr start-xmlstr end-xmlstr)
+    (if (and startpos endpos)
+       (values (subseq xmlstr startpos endpos) nextpos)
+      (values nil nil))))
 
 (defun xml-tag-contents (tag xmlstr &optional (start-xmlstr 0) (end-xmlstr nil))
   "Returns two values: the string between XML start and end tag 
@@ -87,3 +159,15 @@ and position of character following end tag."
 (defun xml-cdata (str)
   (concatenate 'string "<![CDATA[" str "]]>"))
 
+(defun write-xml-cdata (str s)
+  (declare (simple-string str) (optimize (speed 3) (safety 0) (space 0)))
+  (do ((len (length str))
+       (i 0 (1+ i)))
+      ((= i len) str)
+    (declare (fixnum i len))
+    (let ((c (schar str i)))
+      (case c
+       (#\< (write-string "&lt;" s))
+       (#\& (write-string "&amp;" s))
+       (t   (write-char c s))))))
+