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76 lines
3.0 KiB
C
76 lines
3.0 KiB
C
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/*
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* Copyright (c) 2019, Salvatore Sanfilippo <antirez at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------------
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*
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* This file implements the LOLWUT command. The command should do something
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* fun and interesting, and should be replaced by a new implementation at
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* each new version of Redis.
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*/
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#include "server.h"
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#include "lolwut.h"
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/* The LOLWUT 6 command:
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*
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* LOLWUT [columns] [rows]
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*
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* By default the command uses 80 columns, 40 squares per row
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* per column.
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*/
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void lolwut6Command(client *c) {
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long cols = 80;
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long rows = 40;
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/* Parse the optional arguments if any. */
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if (c->argc > 1 &&
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getLongFromObjectOrReply(c,c->argv[1],&cols,NULL) != C_OK)
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return;
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if (c->argc > 2 &&
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getLongFromObjectOrReply(c,c->argv[2],&rows,NULL) != C_OK)
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return;
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/* Limits. We want LOLWUT to be always reasonably fast and cheap to execute
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* so we have maximum number of columns, rows, and output resulution. */
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if (cols < 1) cols = 1;
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if (cols > 1000) cols = 1000;
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if (rows < 1) rows = 1;
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if (rows > 1000) rows = 1000;
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/* Generate the city skyline and reply. */
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sds rendered = sdsempty();
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rendered = sdscat(rendered,
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"\nDedicated to the 8 bit game developers of the past. Redis ver. ");
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rendered = sdscat(rendered,REDIS_VERSION);
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rendered = sdscatlen(rendered,"\n",1);
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addReplyVerbatim(c,rendered,sdslen(rendered),"txt");
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sdsfree(rendered);
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// lwFreeCanvas(canvas);
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}
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