Function valuePop

ThirdParty/libxml2/vtklibxml2/xpath.c:2047–2063

* valuePop: * @ctxt: an XPath evaluation context * * Pops the top XPath object from the value stack * * Returns the XPath object just removed */

 * Returns the XPath object just removed
 */
xmlXPathObjectPtr
valuePop(xmlXPathParserContextPtr ctxt)
{
    xmlXPathObjectPtr ret;

    if ((ctxt == NULL) || (ctxt->valueNr <= 0))
        return (NULL);

    ctxt->valueNr--;
    if (ctxt->valueNr > 0)
        ctxt->value = ctxt->valueTab[ctxt->valueNr - 1];
    else
        ctxt->value = NULL;
    ret = ctxt->valueTab[ctxt->valueNr];
    ctxt->valueTab[ctxt->valueNr] = NULL;
    return (ret);
}
/**
 * valuePush:
 * @ctxt:  an XPath evaluation context