Function xmlXPtrBuildRangeNodeList

ThirdParty/libxml2/vtklibxml2/xpointer.c:1421–1578

* xmlXPtrBuildRangeNodeList: * @range: a range object * * Build a node list tree copy of the range * * Returns an xmlNodePtr list or NULL. * the caller has to free the node tree. */

 *         the caller has to free the node tree.
 */
static xmlNodePtr
xmlXPtrBuildRangeNodeList(xmlXPathObjectPtr range) {
    /* pointers to generated nodes */
    xmlNodePtr list = NULL, last = NULL, parent = NULL, tmp;
    /* pointers to traversal nodes */
    xmlNodePtr start, cur, end;
    int index1, index2;

    if (range == NULL)
	return(NULL);
    if (range->type != XPATH_RANGE)
	return(NULL);
    start = (xmlNodePtr) range->user;

    if ((start == NULL) || (start->type == XML_NAMESPACE_DECL))
	return(NULL);
    end = range->user2;
    if (end == NULL)
	return(xmlCopyNode(start, 1));
    if (end->type == XML_NAMESPACE_DECL)
        return(NULL);

    cur = start;
    index1 = range->index;
    index2 = range->index2;
    while (cur != NULL) {
	if (cur == end) {
	    if (cur->type == XML_TEXT_NODE) {
		const xmlChar *content = cur->content;
		int len;

		if (content == NULL) {
		    tmp = xmlNewTextLen(NULL, 0);
		} else {
		    len = index2;
		    if ((cur == start) && (index1 > 1)) {
			content += (index1 - 1);
			len -= (index1 - 1);
			index1 = 0;
		    } else {
			len = index2;
		    }
		    tmp = xmlNewTextLen(content, len);
		}
		/* single sub text node selection */
		if (list == NULL)
		    return(tmp);
		/* prune and return full set */
		if (last != NULL)
		    xmlAddNextSibling(last, tmp);
		else
		    xmlAddChild(parent, tmp);
		return(list);
	    } else {
		tmp = xmlCopyNode(cur, 0);
		if (list == NULL) {
		    list = tmp;
		    parent = tmp;