Function lolwut6Command

app/redis-6.2.6/src/lolwut6.c:169–201

The LOLWUT 6 command: * * LOLWUT [columns] [rows] * * By default the command uses 80 columns, 40 squares per row * per column. */

 * per column.
 */
void lolwut6Command(client *c) {
    long cols = 80;
    long rows = 20;

    /* Parse the optional arguments if any. */
    if (c->argc > 1 &&
        getLongFromObjectOrReply(c,c->argv[1],&cols,NULL) != C_OK)
        return;

    if (c->argc > 2 &&
        getLongFromObjectOrReply(c,c->argv[2],&rows,NULL) != C_OK)
        return;

    /* Limits. We want LOLWUT to be always reasonably fast and cheap to execute
     * so we have maximum number of columns, rows, and output resulution. */
    if (cols < 1) cols = 1;
    if (cols > 1000) cols = 1000;
    if (rows < 1) rows = 1;
    if (rows > 1000) rows = 1000;

    /* Generate the city skyline and reply. */
    lwCanvas *canvas = lwCreateCanvas(cols,rows,3);
    generateSkyline(canvas);
    sds rendered = renderCanvas(canvas);
    rendered = sdscat(rendered,
        "\nDedicated to the 8 bit game developers of past and present.\n"
        "Original 8 bit image from Plaguemon by hikikomori. Redis ver. ");
    rendered = sdscat(rendered,REDIS_VERSION);
    rendered = sdscatlen(rendered,"\n",1);
    addReplyVerbatim(c,rendered,sdslen(rendered),"txt");
    sdsfree(rendered);
    lwFreeCanvas(canvas);
}