Function xmlXPathIsNaN

ThirdParty/libxml2/vtklibxml2/xpath.c:188–195

* xmlXPathIsNaN: * @val: a double value * * Checks whether a double is a NaN. * * Returns 1 if the value is a NaN, 0 otherwise */

 * Returns 1 if the value is a NaN, 0 otherwise
 */
int
xmlXPathIsNaN(double val) {
#ifdef isnan
    return isnan(val);
#else
    return !(val == val);
#endif
}

/**
 * xmlXPathIsInf: