Function xmlAddChildList

ThirdParty/libxml2/vtklibxml2/tree.c:3292–3356

* xmlAddChildList: * @parent: the parent node * @cur: the first node in the list * * Append a node list to another node. * * See xmlAddChild. * * Returns the last child or NULL in case of error. */

 * Returns the last child or NULL in case of error.
 */
xmlNodePtr
xmlAddChildList(xmlNodePtr parent, xmlNodePtr cur) {
    xmlNodePtr iter;
    xmlNodePtr prev;
    int oom;

    if ((parent == NULL) || (parent->type == XML_NAMESPACE_DECL)) {
	return(NULL);
    }

    if ((cur == NULL) || (cur->type == XML_NAMESPACE_DECL)) {
	return(NULL);
    }

    oom = 0;
    for (iter = cur; iter != NULL; iter = iter->next) {
	if (iter->doc != parent->doc) {
	    if (xmlSetTreeDoc(iter, parent->doc) < 0)
                oom = 1;
	}
    }
    if (oom)
        return(NULL);

    /*
     * add the first element at the end of the children list.
     */

    if (parent->children == NULL) {
        parent->children = cur;
    } else {
        prev = parent->last;

	/*
	 * If cur and parent->last both are TEXT nodes, then merge them.
	 */
	if ((cur->type == XML_TEXT_NODE) &&
	    (prev->type == XML_TEXT_NODE) &&
	    (cur->name == prev->name)) {
            xmlNodePtr next;

            if (xmlTextAddContent(prev, cur->content, -1) < 0)
                return(NULL);
            next = cur->next;
	    xmlFreeNode(cur);
	    /*
	     * if it's the only child, nothing more to be done.
	     */
	    if (next == NULL)
		return(prev);
	    cur = next;
	}

	prev->next = cur;
	cur->prev = prev;
    }
    while (cur->next != NULL) {
	cur->parent = parent;