Function xmlXPathSubValues

ThirdParty/libxml2/vtklibxml2/xpath.c:6450–6463

* xmlXPathSubValues: * @ctxt: the XPath Parser context * * Implement the subtraction operation on XPath objects: * The numeric operators convert their operands to numbers as if * by calling the number function. */

 * by calling the number function.
 */
void
xmlXPathSubValues(xmlXPathParserContextPtr ctxt) {
    xmlXPathObjectPtr arg;
    double val;

    arg = valuePop(ctxt);
    if (arg == NULL)
	XP_ERROR(XPATH_INVALID_OPERAND);
    val = xmlXPathCastToNumberInternal(ctxt, arg);
    xmlXPathReleaseObject(ctxt->context, arg);
    CAST_TO_NUMBER;
    CHECK_TYPE(XPATH_NUMBER);
    ctxt->value->floatval -= val;
}

/**
 * xmlXPathMultValues: