Function xmlAddIDInternal

ThirdParty/libxml2/vtklibxml2/valid.c:2321–2386

* xmlAddIDInternal: * @attr: the attribute holding the ID * @value: the attribute (ID) value * @idPtr: pointer to resulting ID * * Register a new id declaration * * Returns 1 on success, 0 if the ID already exists, -1 if a memory * allocation fails. */

 * allocation fails.
 */
static int
xmlAddIDInternal(xmlAttrPtr attr, const xmlChar *value, xmlIDPtr *idPtr) {
    xmlDocPtr doc;
    xmlIDPtr id;
    xmlIDTablePtr table;
    int ret;

    if (idPtr != NULL)
        *idPtr = NULL;
    if ((value == NULL) || (value[0] == 0))
	return(0);
    if (attr == NULL)
	return(0);

    doc = attr->doc;
    if (doc == NULL)
        return(0);

    /*
     * Create the ID table if needed.
     */
    table = (xmlIDTablePtr) doc->ids;
    if (table == NULL)  {
        doc->ids = table = xmlHashCreateDict(0, doc->dict);
        if (table == NULL)
            return(-1);
    } else {
        id = xmlHashLookup(table, value);
        if (id != NULL)
            return(0);
    }

    id = (xmlIDPtr) xmlMalloc(sizeof(xmlID));
    if (id == NULL)
	return(-1);
    memset(id, 0, sizeof(*id));

    /*
     * fill the structure.
     */
    id->doc = doc;
    id->value = xmlStrdup(value);
    if (id->value == NULL) {
        xmlFreeID(id);
        return(-1);
    }

    if (attr->id != NULL)
        xmlRemoveID(doc, attr);

    if (xmlHashAddEntry(table, value, id) < 0) {
	xmlFreeID(id);
	return(-1);
    }

    ret = 1;
    if (idPtr != NULL)
        *idPtr = id;