Function xmlXPathCacheNewNodeSet

ThirdParty/libxml2/vtklibxml2/xpath.c:1738–1795

* xmlXPathCacheNewNodeSet: * @pctxt the XPath context * @val: the NodePtr value * * This is the cached version of xmlXPathNewNodeSet(). * Acquire an xmlXPathObjectPtr of type NodeSet and initialize * it with the single Node @val * * Returns the created or reused object. */

 * Returns the created or reused object.
 */
static xmlXPathObjectPtr
xmlXPathCacheNewNodeSet(xmlXPathParserContextPtr pctxt, xmlNodePtr val)
{
    xmlXPathObjectPtr ret;
    xmlXPathContextPtr ctxt = pctxt->context;

    if ((ctxt != NULL) && (ctxt->cache != NULL)) {
	xmlXPathContextCachePtr cache = (xmlXPathContextCachePtr) ctxt->cache;

	if (cache->nodesetObjs != NULL) {
	    /*
	    * Use the nodeset-cache.
	    */
	    ret = cache->nodesetObjs;
            cache->nodesetObjs = (void *) ret->stringval;
            cache->numNodeset -= 1;
            ret->stringval = NULL;
	    ret->type = XPATH_NODESET;
	    ret->boolval = 0;
	    if (val) {
		if ((ret->nodesetval->nodeMax == 0) ||
		    (val->type == XML_NAMESPACE_DECL))
		{
		    if (xmlXPathNodeSetAddUnique(ret->nodesetval, val) < 0)
                        xmlXPathPErrMemory(pctxt);
		} else {
		    ret->nodesetval->nodeTab[0] = val;
		    ret->nodesetval->nodeNr = 1;
		}
	    }
	    return(ret);
	} else if (cache->miscObjs != NULL) {
            xmlNodeSetPtr set;
	    /*
	    * Fallback to misc-cache.
	    */

	    set = xmlXPathNodeSetCreate(val);
	    if (set == NULL) {
                xmlXPathPErrMemory(pctxt);
		return(NULL);
	    }

	    ret = cache->miscObjs;
            cache->miscObjs = (void *) ret->stringval;
            cache->numMisc -= 1;
            ret->stringval = NULL;
	    ret->type = XPATH_NODESET;
	    ret->boolval = 0;
	    ret->nodesetval = set;
	    return(ret);
	}
    }
    ret = xmlXPathNewNodeSet(val);
    if (ret == NULL)
        xmlXPathPErrMemory(pctxt);
    return(ret);
}