Function valuePush

ThirdParty/libxml2/vtklibxml2/xpath.c:2076–2109

* valuePush: * @ctxt: an XPath evaluation context * @value: the XPath object * * Pushes a new XPath object on top of the value stack. If value is NULL, * a memory error is recorded in the parser context. * * Returns the number of items on the value stack, or -1 in case of error. * * The object is destroyed in case of error. */

 * The object is destroyed in case of error.
 */
int
valuePush(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr value)
{
    if (ctxt == NULL) return(-1);
    if (value == NULL) {
        /*
         * A NULL value typically indicates that a memory allocation failed.
         */
        xmlXPathPErrMemory(ctxt);
        return(-1);
    }
    if (ctxt->valueNr >= ctxt->valueMax) {
        xmlXPathObjectPtr *tmp;

        if (ctxt->valueMax >= XPATH_MAX_STACK_DEPTH) {
            xmlXPathPErrMemory(ctxt);
            xmlXPathFreeObject(value);
            return (-1);
        }
        tmp = (xmlXPathObjectPtr *) xmlRealloc(ctxt->valueTab,
                                             2 * ctxt->valueMax *
                                             sizeof(ctxt->valueTab[0]));
        if (tmp == NULL) {
            xmlXPathPErrMemory(ctxt);
            xmlXPathFreeObject(value);
            return (-1);
        }
        ctxt->valueMax *= 2;
	ctxt->valueTab = tmp;
    }
    ctxt->valueTab[ctxt->valueNr] = value;
    ctxt->value = value;
    return (ctxt->valueNr++);
}

/**
 * xmlXPathPopBoolean: