Function xmlXPtrStartPointFunction

ThirdParty/libxml2/vtklibxml2/xpointer.c:1772–1841

* xmlXPtrStartPointFunction: * @ctxt: the XPointer Parser context * @nargs: the number of args * * Function implementing start-point() operation * as described in 5.4.3 * ---------------- * location-set start-point(location-set) * * For each location x in the argument location-set, start-point adds a * location of type point to the result location-set. That point represents * the star

 *
 */
static void
xmlXPtrStartPointFunction(xmlXPathParserContextPtr ctxt, int nargs) {
    xmlXPathObjectPtr tmp, obj, point;
    xmlLocationSetPtr newset = NULL;
    xmlLocationSetPtr oldset = NULL;

    CHECK_ARITY(1);
    if ((ctxt->value == NULL) ||
	((ctxt->value->type != XPATH_LOCATIONSET) &&
	 (ctxt->value->type != XPATH_NODESET)))
        XP_ERROR(XPATH_INVALID_TYPE)

    obj = valuePop(ctxt);
    if (obj->type == XPATH_NODESET) {
	/*
	 * First convert to a location set
	 */
	tmp = xmlXPtrNewLocationSetNodeSet(obj->nodesetval);
	xmlXPathFreeObject(obj);
	if (tmp == NULL)
            XP_ERROR(XPATH_MEMORY_ERROR)
	obj = tmp;
    }

    newset = xmlXPtrLocationSetCreate(NULL);
    if (newset == NULL) {
	xmlXPathFreeObject(obj);
        XP_ERROR(XPATH_MEMORY_ERROR);
    }
    oldset = (xmlLocationSetPtr) obj->user;
    if (oldset != NULL) {
	int i;

	for (i = 0; i < oldset->locNr; i++) {
	    tmp = oldset->locTab[i];
	    if (tmp == NULL)
		continue;
	    point = NULL;
	    switch (tmp->type) {
		case XPATH_POINT:
		    point = xmlXPtrNewPoint(tmp->user, tmp->index);
		    break;
		case XPATH_RANGE: {
		    xmlNodePtr node = tmp->user;
		    if (node != NULL) {
			if ((node->type == XML_ATTRIBUTE_NODE) ||
                            (node->type == XML_NAMESPACE_DECL)) {
			    xmlXPathFreeObject(obj);
			    xmlXPtrFreeLocationSet(newset);
			    XP_ERROR(XPTR_SYNTAX_ERROR);
			}
			point = xmlXPtrNewPoint(node, tmp->index);
		    }
		    break;
	        }
		default:
		    /*** Should we raise an error ?
		    xmlXPathFreeObject(obj);