Function xmlSchemaIDCAddStateObject

ThirdParty/libxml2/vtklibxml2/xmlschemas.c:22334–22390

* xmlSchemaIDCAddStateObject: * @vctxt: the WXS validation context * @matcher: the IDC matcher * @sel: the XPath information * @parent: the parent "selector" state object if any * @type: "selector" or "field" * * Creates/reuses and activates state objects for the given * XPath information; if the XPath expression consists of unions, * multiple state objects are created for every unioned e

 * Returns 0 on success and -1 on internal errors.
 */
static int
xmlSchemaIDCAddStateObject(xmlSchemaValidCtxtPtr vctxt,
			xmlSchemaIDCMatcherPtr matcher,
			xmlSchemaIDCSelectPtr sel,
			int type)
{
    xmlSchemaIDCStateObjPtr sto;

    /*
    * Reuse the state objects from the pool.
    */
    if (vctxt->xpathStatePool != NULL) {
	sto = vctxt->xpathStatePool;
	vctxt->xpathStatePool = sto->next;
	sto->next = NULL;
    } else {
	/*
	* Create a new state object.
	*/
	sto = (xmlSchemaIDCStateObjPtr) xmlMalloc(sizeof(xmlSchemaIDCStateObj));
	if (sto == NULL) {
	    xmlSchemaVErrMemory(NULL);
	    return (-1);
	}
	memset(sto, 0, sizeof(xmlSchemaIDCStateObj));
    }
    /*
    * Add to global list.
    */
    if (vctxt->xpathStates != NULL)
	sto->next = vctxt->xpathStates;
    vctxt->xpathStates = sto;

    /*
    * Free the old xpath validation context.
    */
    if (sto->xpathCtxt != NULL)
	xmlFreeStreamCtxt((xmlStreamCtxtPtr) sto->xpathCtxt);

    /*
    * Create a new XPath (pattern) validation context.
    */
    sto->xpathCtxt = (void *) xmlPatternGetStreamCtxt(
	(xmlPatternPtr) sel->xpathComp);
    if (sto->xpathCtxt == NULL) {
	VERROR_INT("xmlSchemaIDCAddStateObject",
	    "failed to create an XPath validation context");
	return (-1);
    }
    sto->type = type;
    sto->depth = vctxt->depth;
    sto->matcher = matcher;
    sto->sel = sel;
    sto->nbHistory = 0;

    return (0);
}