Function cdb2_invoke_callback

cdb2api/cdb2api.c:6947–7047

}

static void *cdb2_invoke_callback(cdb2_hndl_tp *hndl, cdb2_event *e, int argc,
                                  ...)
{
    int i;
    va_list ap;
    void **argv;

    const char *hostname;
    int port;
    const char *sql = NULL;
    void *rc;
    int state;
    char *fp;

    /* Fast return if no arguments need to be passed to the callback. */
    if (e->argc == 0)
        return e->cb(hndl, e->user_arg ? e->user_arg : hndl->user_arg, 0, NULL);

    /* Default arguments from the handle. */
    if (hndl == NULL) {
        hostname = NULL;
        port = -1;
    } else if (hndl->connected_host < 0) {
        if (hndl->cached_host[0] == '\0') {
            hostname = NULL;
            port = -1;
        } else {
            hostname = hndl->cached_host;
            port = hndl->cached_port;
        }
    } else {
        hostname = hndl->hosts[hndl->connected_host];
        port = hndl->ports[hndl->connected_host];
    }
    rc = 0;
    state = 0;

    if (hndl->firstresponse == NULL || !hndl->firstresponse->has_fp)
        fp = NULL;
    else {
        fp = alloca(hndl->firstresponse->fp.len * 2 + 1);
        stringify_fingerprint(fp, hndl->firstresponse->fp.data, hndl->firstresponse->fp.len);
    }

    /* If the event has specified its own arguments, use them. */
    va_start(ap, argc);
    for (i = 0; i < argc; ++i) {
        switch (va_arg(ap, cdb2_event_arg)) {
        case CDB2_HOSTNAME:
            hostname = va_arg(ap, char *);
            break;
        case CDB2_PORT:
            port = va_arg(ap, int);
            break;
        case CDB2_SQL:
            sql = va_arg(ap, char *);
            break;
        case CDB2_RETURN_VALUE: