Improve XML serialization, URI parsing, and XPath node set processing.

third_party/libxml/src/valid.c

 /*
  * valid.c : part of the code use to do the DTD handling and the validity
  *           checking
  *
  * See Copyright for the status of this software.
  *
  * daniel@veillard.com
  */
 
 #define IN_LIBXML
@@ skipping 1154 matching lines @@
             xmlBufferWriteChar(buf, "#PCDATA");
             break;
         case XML_ELEMENT_CONTENT_ELEMENT:
             if (content->prefix != NULL) {
                 xmlBufferWriteCHAR(buf, content->prefix);
                 xmlBufferWriteChar(buf, ":");
             }
             xmlBufferWriteCHAR(buf, content->name);
             break;
         case XML_ELEMENT_CONTENT_SEQ:
+            if (content->c1 == NULL) return;
             if ((content->c1->type == XML_ELEMENT_CONTENT_OR) ||
                 (content->c1->type == XML_ELEMENT_CONTENT_SEQ))
                 xmlDumpElementContent(buf, content->c1, 1);
             else
                 xmlDumpElementContent(buf, content->c1, 0);
             xmlBufferWriteChar(buf, " , ");
+            if (content->c2 == NULL) return;
             if ((content->c2->type == XML_ELEMENT_CONTENT_OR) ||
                 ((content->c2->type == XML_ELEMENT_CONTENT_SEQ) &&
                  (content->c2->ocur != XML_ELEMENT_CONTENT_ONCE)))
                 xmlDumpElementContent(buf, content->c2, 1);
             else
                 xmlDumpElementContent(buf, content->c2, 0);
             break;
         case XML_ELEMENT_CONTENT_OR:
+            if (content->c1 == NULL) return;
             if ((content->c1->type == XML_ELEMENT_CONTENT_OR) ||
                 (content->c1->type == XML_ELEMENT_CONTENT_SEQ))
                 xmlDumpElementContent(buf, content->c1, 1);
             else
                 xmlDumpElementContent(buf, content->c1, 0);
             xmlBufferWriteChar(buf, " | ");
+            if (content->c2 == NULL) return;
             if ((content->c2->type == XML_ELEMENT_CONTENT_SEQ) ||
                 ((content->c2->type == XML_ELEMENT_CONTENT_OR) &&
                  (content->c2->ocur != XML_ELEMENT_CONTENT_ONCE)))
                 xmlDumpElementContent(buf, content->c2, 1);
             else
                 xmlDumpElementContent(buf, content->c2, 0);
             break;
         default:
             xmlErrValid(NULL, XML_ERR_INTERNAL_ERROR,
                     "Internal: ELEMENT content corrupted invalid type\n",
@@ skipping 5840 matching lines @@
      */
     test_node->name = name;
     xmlFreeNode(test_node);
 
     return(nb_valid_elements);
 }
 #endif /* LIBXML_VALID_ENABLED */
 
 #define bottom_valid
 #include "elfgcchack.h"