Function xmlXPathCompOpEvalPredicate

ThirdParty/libxml2/vtklibxml2/xpath.c:10723–10749

* xmlXPathCompOpEvalPredicate: * @ctxt: the XPath Parser context * @op: the predicate op * @set: the node set to filter * @minPos: minimum position in the filtered set (1-based) * @maxPos: maximum position in the filtered set (1-based) * @hasNsNodes: true if the node set may contain namespace nodes * * Filter a node set, keeping only nodes for which the sequence of predicate * expression

 * in the filtered result.
 */
static void
xmlXPathCompOpEvalPredicate(xmlXPathParserContextPtr ctxt,
			    xmlXPathStepOpPtr op,
			    xmlNodeSetPtr set,
                            int minPos, int maxPos,
			    int hasNsNodes)
{
    if (op->ch1 != -1) {
	xmlXPathCompExprPtr comp = ctxt->comp;
	/*
	* Process inner predicates first.
	*/
	if (comp->steps[op->ch1].op != XPATH_OP_PREDICATE) {
            XP_ERROR(XPATH_INVALID_OPERAND);
	}
        if (ctxt->context->depth >= XPATH_MAX_RECURSION_DEPTH)
            XP_ERROR(XPATH_RECURSION_LIMIT_EXCEEDED);
        ctxt->context->depth += 1;
	xmlXPathCompOpEvalPredicate(ctxt, &comp->steps[op->ch1], set,
                                    1, set->nodeNr, hasNsNodes);
        ctxt->context->depth -= 1;
	CHECK_ERROR;
    }

    if (op->ch2 != -1)
        xmlXPathNodeSetFilter(ctxt, set, op->ch2, minPos, maxPos, hasNsNodes);
}

static int
xmlXPathIsPositionalPredicate(xmlXPathParserContextPtr ctxt,