Function representClusterNodeFlags

app/redis-6.2.6/src/cluster.c:4153–4164

Concatenate the comma separated list of node flags to the given SDS * string 'ci'. */

/* Concatenate the comma separated list of node flags to the given SDS
 * string 'ci'. */
sds representClusterNodeFlags(sds ci, uint16_t flags) {
    size_t orig_len = sdslen(ci);
    int i, size = sizeof(redisNodeFlagsTable)/sizeof(struct redisNodeFlags);
    for (i = 0; i < size; i++) {
        struct redisNodeFlags *nodeflag = redisNodeFlagsTable + i;
        if (flags & nodeflag->flag) ci = sdscat(ci, nodeflag->name);
    }
    /* If no flag was added, add the "noflags" special flag. */
    if (sdslen(ci) == orig_len) ci = sdscat(ci,"noflags,");
    sdsIncrLen(ci,-1); /* Remove trailing comma. */
    return ci;
}

/* Generate a csv-alike representation of the specified cluster node.
 * See clusterGenNodesDescription() top comment for more information.