Function xmlXPathSumFunction

ThirdParty/libxml2/vtklibxml2/xpath.c:8569–8590

* xmlXPathSumFunction: * @ctxt: the XPath Parser context * @nargs: the number of arguments * * Implement the sum() XPath function * number sum(node-set) * The sum function returns the sum of the values of the nodes in * the argument node-set. */

 * the argument node-set.
 */
void
xmlXPathSumFunction(xmlXPathParserContextPtr ctxt, int nargs) {
    xmlXPathObjectPtr cur;
    int i;
    double res = 0.0;

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

    if ((cur->nodesetval != NULL) && (cur->nodesetval->nodeNr != 0)) {
	for (i = 0; i < cur->nodesetval->nodeNr; i++) {
	    res += xmlXPathNodeToNumberInternal(ctxt,
                                                cur->nodesetval->nodeTab[i]);
	}
    }
    valuePush(ctxt, xmlXPathCacheNewFloat(ctxt, res));
    xmlXPathReleaseObject(ctxt->context, cur);
}

/**
 * xmlXPathFloorFunction: