Function xmlXPathCheckOpLimit

ThirdParty/libxml2/vtklibxml2/xpath.c:746–759

* xmlXPathCheckOpLimit: * @ctxt: the XPath Parser context * @opCount: the number of operations to be added * * Adds opCount to the running total of operations and returns -1 if the * operation limit is exceeded. Returns 0 otherwise. */

 * operation limit is exceeded. Returns 0 otherwise.
 */
static int
xmlXPathCheckOpLimit(xmlXPathParserContextPtr ctxt, unsigned long opCount) {
    xmlXPathContextPtr xpctxt = ctxt->context;

    if ((opCount > xpctxt->opLimit) ||
        (xpctxt->opCount > xpctxt->opLimit - opCount)) {
        xpctxt->opCount = xpctxt->opLimit;
        xmlXPathErr(ctxt, XPATH_OP_LIMIT_EXCEEDED);
        return(-1);
    }

    xpctxt->opCount += opCount;
    return(0);
}

#define OP_LIMIT_EXCEEDED(ctxt, n) \
    ((ctxt->context->opLimit != 0) && (xmlXPathCheckOpLimit(ctxt, n) < 0))