Function RM_ReplyWithArray

app/redis-6.2.6/src/module.c:1549–1562

Reply with an array type of 'len' elements. However 'len' other calls * to `ReplyWith*` style functions must follow in order to emit the elements * of the array. * * When producing arrays with a number of element that is not known beforehand * the function can be called with the special count * REDISMODULE_POSTPONED_ARRAY_LEN, and the actual number of elements can be * later set with RedisM

 *
 * The function always returns REDISMODULE_OK. */
int RM_ReplyWithArray(RedisModuleCtx *ctx, long len) {
    client *c = moduleGetReplyClient(ctx);
    if (c == NULL) return REDISMODULE_OK;
    if (len == REDISMODULE_POSTPONED_ARRAY_LEN) {
        ctx->postponed_arrays = zrealloc(ctx->postponed_arrays,sizeof(void*)*
                (ctx->postponed_arrays_count+1));
        ctx->postponed_arrays[ctx->postponed_arrays_count] =
            addReplyDeferredLen(c);
        ctx->postponed_arrays_count++;
    } else {
        addReplyArrayLen(c,len);
    }
    return REDISMODULE_OK;
}

/* Reply to the client with a null array, simply null in RESP3 
 * null array in RESP2.