Function xmlXPathIntersection

ThirdParty/libxml2/vtklibxml2/xpath.c:3549–3574

* xmlXPathIntersection: * @nodes1: a node-set * @nodes2: a node-set * * Implements the EXSLT - Sets intersection() function: * node-set set:intersection (node-set, node-set) * * Returns a node set comprising the nodes that are within both the * node sets passed as arguments */

 *         node sets passed as arguments
 */
xmlNodeSetPtr
xmlXPathIntersection (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) {
    xmlNodeSetPtr ret = xmlXPathNodeSetCreate(NULL);
    int i, l1;
    xmlNodePtr cur;

    if (ret == NULL)
        return(ret);
    if (xmlXPathNodeSetIsEmpty(nodes1))
	return(ret);
    if (xmlXPathNodeSetIsEmpty(nodes2))
	return(ret);

    l1 = xmlXPathNodeSetGetLength(nodes1);

    for (i = 0; i < l1; i++) {
	cur = xmlXPathNodeSetItem(nodes1, i);
	if (xmlXPathNodeSetContains(nodes2, cur)) {
	    if (xmlXPathNodeSetAddUnique(ret, cur) < 0) {
                xmlXPathFreeNodeSet(ret);
	        return(NULL);
            }
	}
    }
    return(ret);
}

/**
 * xmlXPathDistinctSorted: