Function xmlFetchXMLCatalogFile

ThirdParty/libxml2/vtklibxml2/catalog.c:1375–1444

* xmlFetchXMLCatalogFile: * @catal: an existing but incomplete catalog entry * * Fetch and parse the subcatalog referenced by an entry * * Returns 0 in case of success, -1 otherwise */

 * Returns 0 in case of success, -1 otherwise
 */
static int
xmlFetchXMLCatalogFile(xmlCatalogEntryPtr catal) {
    xmlCatalogEntryPtr doc;

    if (catal == NULL)
	return(-1);
    if (catal->URL == NULL)
	return(-1);

    /*
     * lock the whole catalog for modification
     */
    xmlRMutexLock(xmlCatalogMutex);
    if (catal->children != NULL) {
	/* Okay someone else did it in the meantime */
	xmlRMutexUnlock(xmlCatalogMutex);
	return(0);
    }

    if (xmlCatalogXMLFiles != NULL) {
	doc = (xmlCatalogEntryPtr)
	    xmlHashLookup(xmlCatalogXMLFiles, catal->URL);
	if (doc != NULL) {
	    if (xmlDebugCatalogs)
		fprintf(stderr,
		    "Found %s in file hash\n", catal->URL);

	    if (catal->type == XML_CATA_CATALOG)
		catal->children = doc->children;
	    else
		catal->children = doc;
	    catal->dealloc = 0;
	    xmlRMutexUnlock(xmlCatalogMutex);
	    return(0);
	}
	if (xmlDebugCatalogs)
	    fprintf(stderr,
		"%s not found in file hash\n", catal->URL);
    }

    /*
     * Fetch and parse. Note that xmlParseXMLCatalogFile does not
     * use the existing catalog, there is no recursion allowed at
     * that level.
     */
    doc = xmlParseXMLCatalogFile(catal->prefer, catal->URL);
    if (doc == NULL) {
	catal->type = XML_CATA_BROKEN_CATALOG;
	xmlRMutexUnlock(xmlCatalogMutex);
	return(-1);
    }

    if (catal->type == XML_CATA_CATALOG)
	catal->children = doc->children;
    else
	catal->children = doc;

    doc->dealloc = 1;