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<h1 id="warning-these-guidelines-are-out-of-date">WARNING: These guidelines are OUT OF DATE</h1> <h1 id="warning-these-guidelines-are-out-of-date">WARNING: These guidelines are OUT OF DATE</h1>
<p>They are a <strong>very tentative proposal</strong> for the next IOCCC <p>These guidelines are a <strong>very tentative proposal</strong> for the next IOCCC
that is <strong>VERY LIKELY</strong> to be updated before the next IOCCC. that is <strong>VERY LIKELY</strong> to be updated before the next IOCCC.
They are are provided as a <strong>very tentative</strong> hint at what They are are provided as a <strong>very tentative</strong> hint at what
might be used in a future IOCCC.</p> might be used in a future IOCCC.</p>
@@ -396,46 +396,48 @@ might be used in a future IOCCC.</p>
<a href="https://fosstodon.org/@ioccc"><span class="citation" data-cites="IOCCC">@IOCCC</span> mastodon feed</a> for information about future IOCCC openings.</p> <a href="https://fosstodon.org/@ioccc"><span class="citation" data-cites="IOCCC">@IOCCC</span> mastodon feed</a> for information about future IOCCC openings.</p>
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<h1 id="th-international-obfuscated-c-code-contest-official-guidelines">27th International Obfuscated C Code Contest Official Guidelines</h1> <h1 id="th-international-obfuscated-c-code-contest-official-guidelines">28th International Obfuscated C Code Contest Official Guidelines</h1>
<p>Copyright © 2024 Leonid A. Broukhis, Landon Curt Noll.</p> <p>Copyright © 2024 Leonid A. Broukhis, Landon Curt Noll.</p>
<p>All Rights Reserved. Permission for personal, education or non-profit use is <p>All Rights Reserved. Permission for personal, education or non-profit use is
granted provided this this copyright and notice are included in its entirety granted provided this this copyright and notice are included in its entirety
and remains unaltered. All other uses must receive prior permission in and remains unaltered. All other uses must receive prior permission in
writing from the contest judges.</p> writing by <a href="../contact.html">contacting the judges</a>.</p>
<h2 id="guidelines-version">Guidelines version</h2> <h2 id="guidelines-version">Guidelines version</h2>
<p><strong><code>|</code></strong> This guidelines file is version <strong>2023-04-04-v28</strong>.</p> <p><strong><code>|</code></strong> This guidelines file is version <strong>2023-04-04-v28</strong>.</p>
<p><strong>IMPORTANT</strong>: Be sure to read the <a href="rules.html">IOCCC rules</a>.</p> <p><strong>IMPORTANT</strong>: Be <strong>SURE</strong> to read the <a href="rules.html">IOCCC rules</a>.</p>
<h3 id="change-marks">Change marks</h3> <h3 id="change-marks">Change marks</h3>
<p><strong><code>|</code></strong> <strong>← Lines that start with this symbol indicate a change from the previous IOCCC</strong></p> <p><strong><code>|</code></strong> <strong>← Lines that start with this symbol indicate a change from the previous IOCCC</strong></p>
<p>Most lines (we sometimes make mistakes) that were modified start the <strong><code>|</code></strong> symbol.</p> <p>Most lines (we sometimes make mistakes) that were modified since the previous
IOCCC start with the <strong><code>|</code></strong> symbol.</p>
<h1 id="about-this-file">ABOUT THIS FILE:</h1> <h1 id="about-this-file">ABOUT THIS FILE:</h1>
<p>This file contains guidelines intended to help people who wish to <p>This file contains <em>guidelines</em> intended to help people who wish to
submit entries to the International Obfuscated C Code Contest (IOCCC).</p> submit entries to the <a href="https://www.ioccc.org">International Obfuscated C Code Contest
<p>This is not the IOCCC rules, though it does contain comments about (IOCCC)</a>.</p>
them. The guidelines should be viewed as hints and suggestions. <p>These are not the IOCCC rules, though it does contain comments about
them. The guidelines should be viewed as <em>hints</em> and <em>suggestions</em>.
Entries that violate the guidelines but remain within the rules are Entries that violate the guidelines but remain within the rules are
allowed. Even so, you are safer if you remain within the guidelines.</p> allowed. Even so, you are safer if you remain within the guidelines.</p>
<p>You should read the current IOCCC rules, prior to submitting entries. <p>You should read the current <a href="rules.html">IOCCC rules</a>, prior to submitting entries.
The rules are typically sent out with these guidelines.</p> The rules are typically sent out with these guidelines.</p>
<h1 id="whats-new-in-20192020">WHAT’S NEW IN 2019/2020</h1> <h1 id="whats-new-in-20192020">WHAT’S NEW IN 2019/2020</h1>
<p><strong><code>|</code></strong> This IOCCC runs from <strong>2019-Dec-26 06:01:41 UTC</strong> to <strong>2020-Mar-15 06:26:49 UTC</strong>.</p> <p><strong><code>|</code></strong> This IOCCC runs from <strong>2019-Dec-26 06:01:41 UTC</strong> to <strong>2020-Mar-15 06:26:49 UTC</strong>.</p>
<p><strong><code>|</code></strong> The reason for the times of day are so that key IOCCC events occur during UTC <p><strong><code>|</code></strong> The reason for the times of day are so that key IOCCC events occur during UTC
<strong><code>|</code></strong> “prime time”. Do you understand why we factored this into the rules and <strong><code>|</code></strong> “prime time”. Do you understand why we factored this into the rules and
<strong><code>|</code></strong> guidelines? :-)</p> <strong><code>|</code></strong> guidelines? :-)</p>
<p>Until the start of this IOCCC, these rules, guidelines and iocccsize.c tool <p>Until the start of this IOCCC, these rules, guidelines and iocccsize.c
should be considered provisional BETA versions and may be adjusted (contained in the <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry
at any time.</p> toolkit</a>)
tool should be considered provisional <strong>BETA</strong> versions and may be
adjusted <strong>AT ANY TIME</strong>.</p>
<p><strong><code>|</code></strong> Even though the contest will start in 2019, because the contest will close <p><strong><code>|</code></strong> Even though the contest will start in 2019, because the contest will close
<strong><code>|</code></strong> in 2020, URLs, subject lines, and contest related email addresses use 2019.</p> <strong><code>|</code></strong> in 2020, URLs, subject lines, and contest related email addresses use 2019.</p>
<p>The IOCCC submission URL:</p> <p>The IOCCC submission URL is <a href="https://submit.ioccc.org/" class="uri">https://submit.ioccc.org/</a>.</p>
<pre><code> https://submit.ioccc.org/</code></pre>
<p><strong><code>|</code></strong> The submit URL should be active on or slightly before <strong>2020-Jan-15 12:21:37 UTC</strong>.</p> <p><strong><code>|</code></strong> The submit URL should be active on or slightly before <strong>2020-Jan-15 12:21:37 UTC</strong>.</p>
<p>Please wait to submit your entries until after that time.</p> <p>Please wait to submit your entries until after that time.</p>
<p>The official rules, guidelines and iocccsize.c tool will be available <p>The official rules, guidelines and iocccsize.c (invoked by the mkiocccentry) tool will be available
on the official IOCCC website on or slightly before start of this IOCCC. on the official IOCCC website on or slightly before start of this IOCCC.
Please check the IOCCC website “How to enter” link:</p> Please check the IOCCC FAQ <a href="../faq#submit">How to submit</a>.
<pre><code> https://www.ioccc.org/index.html#enter</code></pre> on or after the start of this IOCCC to be sure you are using the correct
<p>on or after the start of this IOCCC to be sure you are using the correct
versions of these items before using the IOCCC entry submission URL.</p> versions of these items before using the IOCCC entry submission URL.</p>
<h1 id="hints-and-suggestions">HINTS AND SUGGESTIONS:</h1> <h1 id="hints-and-suggestions">HINTS AND SUGGESTIONS:</h1>
<p>You are encouraged to examine the winners of previous contests. See <p>You are encouraged to examine the winners of previous contests. See
@@ -568,9 +570,11 @@ and enjoy your entry.</p>
So try to ensure that your entry compiles warning free. If possible, So try to ensure that your entry compiles warning free. If possible,
to compile compile your code using:</p> to compile compile your code using:</p>
<pre><code> -Wall -Wextra -pedantic</code></pre> <pre><code> -Wall -Wextra -pedantic</code></pre>
<p>For compilers, such as clang, that have the -Weverything option, try <p>For compilers, such as clang, that have the <code>-Weverything</code> option, try
to make your code compile warning free using:</p> to make your code compile warning free using:</p>
<pre><code> -Wall -Wextra -Weverything -pedantic</code></pre> <pre><code> -Wall -Wextra -Weverything -pedantic</code></pre>
<p>.. though see <a href="../faq.html#faq3_11">Why do Makefiles use -Weverything with
clang?</a> in the <a href="../faq.html">FAQ</a>.</p>
<p>If you must turn off various warnings on the compile line such as:</p> <p>If you must turn off various warnings on the compile line such as:</p>
<pre><code> ... -Wno-empty-body -Wno-return-type ...</code></pre> <pre><code> ... -Wno-empty-body -Wno-return-type ...</code></pre>
<p>be sure to clearly state so in your remarks AS WELL AS in <p>be sure to clearly state so in your remarks AS WELL AS in
@@ -588,7 +592,7 @@ except in one small part (ISO/IEC 9899:2011) where they might not truly
understand the implications of such words.</p> understand the implications of such words.</p>
<pre><code> http://hitchhikers.wikia.com/wiki/Belgium <pre><code> http://hitchhikers.wikia.com/wiki/Belgium
http://www.bezem.de/pdf/ReservedWordsInC.pdf</code></pre> http://www.bezem.de/pdf/ReservedWordsInC.pdf</code></pre>
<p>DO NOT assume that we will use gcc to compile your program. <p><strong>DO NOT</strong> assume that we will use gcc to compile your program.
We will first try to compile your program using Clang.</p> We will first try to compile your program using Clang.</p>
<p>It is much better to not use any obscure compiler flags if <p>It is much better to not use any obscure compiler flags if
you can help it. We want to discourage the use of obscure compiler you can help it. We want to discourage the use of obscure compiler
@@ -602,7 +606,7 @@ of nested functions such as:</p>
| please_do_not_submit_this(); | please_do_not_submit_this();
}</code></pre> }</code></pre>
<p>This is because such nested functions often requires one to compile with <p>This is because such nested functions often requires one to compile with
a flag such as -fnested-functions that is not found on some compilers.</p> a flag such as <code>-fnested-functions</code> that is not found on some compilers.</p>
<p>On 2012 July 20, the judges rescinded the encouragement of <p>On 2012 July 20, the judges rescinded the encouragement of
nested functions. Such constructions, while interesting and sometimes nested functions. Such constructions, while interesting and sometimes
amusing, will have to wait until they required by a C standard that are amusing, will have to wait until they required by a C standard that are
@@ -610,23 +614,23 @@ actually implemented in commonly used C compilers. Sorry!</p>
<p><strong><code>|</code></strong> We prefer programs that do not require a fish license: crayons and <p><strong><code>|</code></strong> We prefer programs that do not require a fish license: crayons and
<strong><code>|</code></strong> cat detector vans not withstanding.</p> <strong><code>|</code></strong> cat detector vans not withstanding.</p>
<p>If your entry uses functions that have a variable number of <p>If your entry uses functions that have a variable number of
arguments, be careful. Systems implement va_list as a wide variety arguments, be careful. Systems implement <code>va_list</code> as a wide variety
of ways. Because of this, a number of operations using va_list are of ways. Because of this, a number of operations using <code>va_list</code> are
not portable and must not be used:</p> not portable and must not be used:</p>
<ul> <ul>
<li>assigning a non-va_list variable to/from a va_list variable</li> <li>assigning a non-<code>va_list</code> variable to/from a <code>va_list</code> variable</li>
<li>casting a non-va_list variable into/from a va_list variable</li> <li>casting a non-<code>va_list</code> variable into/from a <code>va_list</code> variable</li>
<li>passing a va_list variable to a function expecting a non-va_list arg</li> <li>passing a <code>va_list</code> variable to a function expecting a non-<code>va_list</code> arg</li>
<li>passing a non-va_list variable to a function expecting a va_list arg</li> <li>passing a non-<code>va_list</code> variable to a function expecting a <code>va_list</code> arg</li>
<li>performing arithmetic on va_list variables</li> <li>performing arithmetic on <code>va_list</code> variables</li>
<li>using va_list as a structure or union</li> <li>using <code>va_list</code> as a structure or union</li>
</ul> </ul>
<p>In particular, do not treat va_list variables as if they were a char **’s.</p> <p>In particular, do not treat <code>va_list</code> variables as if they were a <code>char **</code>s.</p>
<p>Avoid using &lt;varargs.h&gt;. Use &lt;stdarg.h&gt; instead.</p> <p>Avoid using <code>varargs.h</code>. Use <code>stdarg.h</code> instead.</p>
<p>On 28 January 2007, the Judges rescinded the requirement that the <p>On 28 January 2007, the Judges rescinded the requirement that the
’#” in a C preprocessor directive must be the 1st non-whitespace octet.</p> <code>#</code> in a C preprocessor directive must be the 1st non-whitespace octet.</p>
<p>The exit() function returns void. Some broken systems have exit() <p>The <code>exit(3)</code> function returns void. Some broken systems have <code>exit(3)</code>
return int, your entry should assume that exit() returns a void.</p> return <code>int</code>, your entry should assume that <code>exit(3)</code> returns a <code>void</code>.</p>
<p><strong><code>|</code></strong> This guideline has a change mark at the very start of this line.</p> <p><strong><code>|</code></strong> This guideline has a change mark at the very start of this line.</p>
<p>Small programs are best when they are short, obscure and concise. <p>Small programs are best when they are short, obscure and concise.
While such programs are not as complex as other winners, they do While such programs are not as complex as other winners, they do
@@ -697,13 +701,13 @@ operating systems (i.e., Linux, GNU Hurd, BSD, Unix, etc.).</p>
<p>There are at least zero judges who think that Fideism has little <p>There are at least zero judges who think that Fideism has little
or nothing to do with the IOCCC judging process.</p> or nothing to do with the IOCCC judging process.</p>
<p>Don’t forget that the building of your program should be done <p>Don’t forget that the building of your program should be done
<strong><em>without human intervention</em></strong>. So don’t do things such as:</p> <strong><em>WITHOUT human intervention</em></strong>. So don’t do things such as:</p>
<pre><code> prog: prog.c <pre><code> prog: prog.c
#echo this next line requires data from standard input #echo this next line requires data from standard input
cat &gt; prog.c cat &gt; prog.c
${CC} prog.c -o prog</code></pre> ${CC} prog.c -o prog</code></pre>
<p>However, you can do something cute such as making your program <p>However, you can do something cute such as making your program
do something dumb (or cute) when it is built ‘automatically’. And do something dumb (or cute) when it is built ‘automatically’, and
when it is run with a human involved, do something more clever. when it is run with a human involved, do something more clever.
For example, one could use the build instructions:</p> For example, one could use the build instructions:</p>
<pre><code> prog: prog.c <pre><code> prog: prog.c
@@ -713,14 +717,14 @@ For example, one could use the build instructions:</p>
alternate / human intervention based building.</p> alternate / human intervention based building.</p>
<p>We want to get away from source that is simply a compact blob of <p>We want to get away from source that is simply a compact blob of
octets. Really try to be more creative than blob coding. <em>HINT!</em></p> octets. Really try to be more creative than blob coding. <em>HINT!</em></p>
<p>Please do not use things like gzip to get around the size limit. <p>Please do not use things like <code>gzip(1)</code> to get around the size limit.
Please try to be much more creative.</p> Please try to be much more creative.</p>
<p>We really dislike entries that make blatant use of including <p>We really dislike entries that make blatant use of including
large data files to get around the source code size limit.</p> large data files to get around the source code size limit.</p>
<p>We do not recommend submitting systemd source code to the IOCCC, <p>We do not recommend submitting <a href="https://systemd.io">systemd</a> source code to the IOCCC,
if nothing else because that code is likely to exceed the source code if nothing else because that code is likely to exceed the source code
size limit. This isn’t to say that another highly compact and obfuscated size limit. This isn’t to say that another highly compact and obfuscated
replacement of init would not be an interesting submission.</p> replacement of <code>init</code> would not be an interesting submission.</p>
<p>Did we remember to indicate that programs that blatantly use <p>Did we remember to indicate that programs that blatantly use
some complex state machine to do something simple are boring? some complex state machine to do something simple are boring?
We think we did. :-)</p> We think we did. :-)</p>
@@ -732,7 +736,7 @@ version of the same program that is formatted in an interesting
and/or obfuscated way, would definitely win over the first two! and/or obfuscated way, would definitely win over the first two!
Remember, you can submit more than one entry. See the rules for details.</p> Remember, you can submit more than one entry. See the rules for details.</p>
<p>We suggest that you avoid trying for the ‘smallest self-replicating’ <p>We suggest that you avoid trying for the ‘smallest self-replicating’
source. The smallest, a zero byte entry, won in 1994.</p> source. The smallest, a zero byte entry, <a href="../1994/smr/index.html">won in 1994</a>.</p>
<p>Programs that claim to be the smallest C source that does something, really <p>Programs that claim to be the smallest C source that does something, really
better be the smallest such program or they risk being rejected because better be the smallest such program or they risk being rejected because
they do not work as documented.</p> they do not work as documented.</p>
@@ -813,7 +817,7 @@ read so many twisted entries, you too would enjoy a good laugh or two.
We think the readers of the contest winners do as well. We do read We think the readers of the contest winners do as well. We do read
the program “remarks” during the judging process, so it is worth your the program “remarks” during the judging process, so it is worth your
while to write remarkable program “remarks”.</p> while to write remarkable program “remarks”.</p>
<p>We dislike C code with trailing control-M’s (r \015) that results <p>We dislike C code with trailing control-M’s (<code>\r</code> or <code>\015</code>) that results
in compilation failures. Some non-Unix/non-Linux tools such as in compilation failures. Some non-Unix/non-Linux tools such as
MS Visual C and MS Visual C++ leave trailing control-M’s on lines. MS Visual C and MS Visual C++ leave trailing control-M’s on lines.
Users of such tools should strip off such control-M’s before submitting Users of such tools should strip off such control-M’s before submitting
@@ -832,7 +836,7 @@ Instead of unescaped octets, you should use or escapes:</p>
<p>It is a very good idea to, in your remarks file, tell us why you <p>It is a very good idea to, in your remarks file, tell us why you
think your entry is obfuscated. This is particularly true if think your entry is obfuscated. This is particularly true if
your entry is has some very subtle obfuscations that we might your entry is has some very subtle obfuscations that we might
otherwise overlook. &lt;&lt;– Hint!</p> otherwise overlook. <strong>&lt;&lt;– Hint!</strong></p>
<p>Anyone can format their code into a dense blob. A really clever <p>Anyone can format their code into a dense blob. A really clever
author will try format their entry using a “normal” formatting style author will try format their entry using a “normal” formatting style
such that at first glance (if you squint and don’t look at the details) such that at first glance (if you squint and don’t look at the details)
@@ -941,11 +945,11 @@ sales, product management an even from customers themselves on a
all too regular basis. This is one of the reasons why the rules and all too regular basis. This is one of the reasons why the rules and
guidelines are written in obfuscated form.</p> guidelines are written in obfuscated form.</p>
<h1 id="judging-process">JUDGING PROCESS:</h1> <h1 id="judging-process">JUDGING PROCESS:</h1>
<p>Entries are judged by Leonid A. Broukhis, Simon Cooper, Landon Curt Noll.</p> <p>Entries are judged by Leonid A. Broukhis and Landon Curt Noll.</p>
<p>Each entry submitted is given a random id number and subdirectory. The <p>Each entry submitted is given a random id number and subdirectory. The
entry files including, but not limited to prog.c, Makefile (that we entry files including, but not limited to prog.c, Makefile (that we
form from around your “how to build” information), as well as any form from around your “how to build” information), as well as any
data files that you submit are all placed under their own directory. data files that you submit are all placed under their own directory
stored and judged from this directory.</p> stored and judged from this directory.</p>
<p>Any information about the authors is not read by the judges until <p>Any information about the authors is not read by the judges until
the judging process is complete, and then only from entries that have the judging process is complete, and then only from entries that have
@@ -959,7 +963,7 @@ about the others. However we consider this to be simply circumstantial
and outside the scope of the above paragraph.</p> and outside the scope of the above paragraph.</p>
<p>Some people, in the past, have attempted to obfuscate their identity by <p>Some people, in the past, have attempted to obfuscate their identity by
including comments of famous Internet personalities such as Peter Honeyman including comments of famous Internet personalities such as Peter Honeyman
(http://www.citi.umich.edu/u/honey/). The judges are on to this (<a href="http://www.citi.umich.edu/u/honey/" class="uri">http://www.citi.umich.edu/u/honey/</a>). The judges are on to this
trick and therefore consider any obfuscated source or data file trick and therefore consider any obfuscated source or data file
claiming to be from Honeyman to not be form Honeyman. This of course claiming to be from Honeyman to not be form Honeyman. This of course
creates an interesting paradox known as the “obfuscated Peter Honeyman creates an interesting paradox known as the “obfuscated Peter Honeyman
@@ -972,7 +976,7 @@ won an award. So it is theoretically possible that Peter Honeyman
did submit an entry in the past. In the past, Peter had denied did submit an entry in the past. In the past, Peter had denied
submitting anything to the IOCCC. Perhaps those entries were submitting anything to the IOCCC. Perhaps those entries were
submitted by one of his students?</p> submitted by one of his students?</p>
<p>Hopefully we are very CLEAR on this point! The rules now strongly state: <p>Hopefully we are <strong>VERY CLEAR</strong> on this point! The rules now strongly state:
PLEASE DO NOT put a name of an author, in an obvious way, into your PLEASE DO NOT put a name of an author, in an obvious way, into your
source code, remarks, data files, etc. The above “Peter Honeyman is source code, remarks, data files, etc. The above “Peter Honeyman is
exempt” not withstanding.</p> exempt” not withstanding.</p>
@@ -985,7 +989,7 @@ Because the main ‘prize’ of winning is being announced, we make all
attempts to send non-winners into oblivion. We remove all non-winning attempts to send non-winners into oblivion. We remove all non-winning
files, and shred all related paper. By tradition, we do not even files, and shred all related paper. By tradition, we do not even
reveal the number of entries that we received.</p> reveal the number of entries that we received.</p>
<p>During the judging process. a process that spans multiple sessions <p>During the judging process, a process that spans multiple sessions
over a few weeks, post general updates from our <span class="citation" data-cites="IOCCC">@IOCCC</span> twitter account.</p> over a few weeks, post general updates from our <span class="citation" data-cites="IOCCC">@IOCCC</span> twitter account.</p>
<p>Once we have selected the winners, for each category we will tweet:</p> <p>Once we have selected the winners, for each category we will tweet:</p>
<ul> <ul>
@@ -1002,12 +1006,12 @@ often accept their suggestions/comments about our remarks as well.
This is done prior to posting the winners to the wide world.</p> This is done prior to posting the winners to the wide world.</p>
<h2 id="an-important-2023-update-to-how-winners-are-announced">An important 2023 update to how winners are announced</h2> <h2 id="an-important-2023-update-to-how-winners-are-announced">An important 2023 update to how winners are announced</h2>
<p>The IOCCC no longer uses twitter. IOCCC entries will be announced <p>The IOCCC no longer uses twitter. IOCCC entries will be announced
by a git commit to the IOCCC entries repo:</p> by a git commit to the <a href="https://github.com/ioccc-src/winner">IOCCC entries
<pre><code> https://github.com/ioccc-src/winner</code></pre> repo</a>.</p>
<p>that, in turn, updates the offivial IOCCC website:</p> <p>that, in turn, updates the <a href="https://www.ioccc.org/index.html">official IOCCC
<pre><code> https://www.ioccc.org/index.html</code></pre> website</a>.</p>
<p>In addition a note is posted to the IOCCC Mastodon account:</p> <p>In addition a note is posted to the IOCCC Mastodon account
<pre><code> https://fosstodon.org/@ioccc</code></pre> (<a href="https://fosstodon.org/@ioccc" class="uri">https://fosstodon.org/@ioccc</a>).</p>
<h2 id="back-to-the-judging-process">Back to the Judging process</h2> <h2 id="back-to-the-judging-process">Back to the Judging process</h2>
<p>Judging consists of a number of elimination rounds. During a round, <p>Judging consists of a number of elimination rounds. During a round,
the collection of entries are divided into two roughly equal piles; the collection of entries are divided into two roughly equal piles;
@@ -1123,7 +1127,7 @@ by a git commit to the IOCCC entries repo:</p>
<pre><code> https://www.ioccc.org/index.html</code></pre> <pre><code> https://www.ioccc.org/index.html</code></pre>
<p>In addition a note is posted to the IOCCC Mastodon account:</p> <p>In addition a note is posted to the IOCCC Mastodon account:</p>
<pre><code> https://fosstodon.org/@ioccc</code></pre> <pre><code> https://fosstodon.org/@ioccc</code></pre>
<h2 id="back-to-annoucement-of-winners">Back to annoucement of winners</h2> <h2 id="back-to-announcement-of-winners">Back to announcement of winners</h2>
<p>It is pointless to ask the IOCCC judges how many entries we receive. <p>It is pointless to ask the IOCCC judges how many entries we receive.
Other government TLA or FLA snooping organizations are prohibited from Other government TLA or FLA snooping organizations are prohibited from
either confirming, denying or revealing any knowledge of this data point.</p> either confirming, denying or revealing any knowledge of this data point.</p>
@@ -1133,8 +1137,8 @@ and on T-Shirts. More than one winner has been turned in a tattoo!</p>
<p>Last, but not least, winners receive international fame and flames! :-)</p> <p>Last, but not least, winners receive international fame and flames! :-)</p>
<h1 id="for-more-information">FOR MORE INFORMATION:</h1> <h1 id="for-more-information">FOR MORE INFORMATION:</h1>
<p>You may contact the judges by sending email to the following address:</p> <p>You may contact the judges by sending email to the following address:</p>
<pre><code>| q.2020@ioccc.org (do not submit entries to this address)</code></pre> <pre><code>| q.2024@ioccc.org (do not submit entries to this address)</code></pre>
<p><strong><code>|</code></strong> You must include the words ‘ioccc 2020 question’ in the subject of your <p><strong><code>|</code></strong> You must include the words ‘ioccc 2024 question’ in the subject of your
email message when sending email to the judges.</p> email message when sending email to the judges.</p>
<p>Questions and comments about the contest are welcome. Comments about <p>Questions and comments about the contest are welcome. Comments about
confusing rules and guidelines are also welcome.</p> confusing rules and guidelines are also welcome.</p>
next/guidelines.md
+62 -72
View File
@@ -2,7 +2,7 @@
# WARNING: These guidelines are OUT OF DATE # WARNING: These guidelines are OUT OF DATE
They are a **very tentative proposal** for the next IOCCC These guidelines are a **very tentative proposal** for the next IOCCC
that is **VERY LIKELY** to be updated before the next IOCCC. that is **VERY LIKELY** to be updated before the next IOCCC.
They are are provided as a **very tentative** hint at what They are are provided as a **very tentative** hint at what
might be used in a future IOCCC. might be used in a future IOCCC.
@@ -20,41 +20,43 @@ Watch both [the IOCCC status page](../status.html) and the
<!-- END: the next line ends content from: inc/guidelines.closed.hdr --> <!-- END: the next line ends content from: inc/guidelines.closed.hdr -->
<!-- This is the last line modified by the tool: bin/gen-status.sh --> <!-- This is the last line modified by the tool: bin/gen-status.sh -->
# 27th International Obfuscated C Code Contest Official Guidelines # 28th International Obfuscated C Code Contest Official Guidelines
Copyright &copy; 2024 Leonid A. Broukhis, Landon Curt Noll. Copyright &copy; 2024 Leonid A. Broukhis, Landon Curt Noll.
All Rights Reserved. Permission for personal, education or non-profit use is All Rights Reserved. Permission for personal, education or non-profit use is
granted provided this this copyright and notice are included in its entirety granted provided this this copyright and notice are included in its entirety
and remains unaltered. All other uses must receive prior permission in and remains unaltered. All other uses must receive prior permission in
writing from the contest judges. writing by [contacting the judges](../contact.html).
## Guidelines version ## Guidelines version
**`|`** This guidelines file is version **2023-04-04-v28**. **`|`** This guidelines file is version **2023-04-04-v28**.
**IMPORTANT**: Be sure to read the [IOCCC rules](rules.html). **IMPORTANT**: Be **SURE** to read the [IOCCC rules](rules.html).
### Change marks ### Change marks
**`|`** **&larr; Lines that start with this symbol indicate a change from the previous IOCCC** **`|`** **&larr; Lines that start with this symbol indicate a change from the previous IOCCC**
Most lines (we sometimes make mistakes) that were modified start the **`|`** symbol. Most lines (we sometimes make mistakes) that were modified since the previous
IOCCC start with the **`|`** symbol.
# ABOUT THIS FILE: # ABOUT THIS FILE:
This file contains guidelines intended to help people who wish to This file contains _guidelines_ intended to help people who wish to
submit entries to the International Obfuscated C Code Contest (IOCCC). submit entries to the [International Obfuscated C Code Contest
&#x28;IOCCC&#x29;](https://www.ioccc.org).
This is not the IOCCC rules, though it does contain comments about These are not the IOCCC rules, though it does contain comments about
them. The guidelines should be viewed as hints and suggestions. them. The guidelines should be viewed as _hints_ and _suggestions_.
Entries that violate the guidelines but remain within the rules are Entries that violate the guidelines but remain within the rules are
allowed. Even so, you are safer if you remain within the guidelines. allowed. Even so, you are safer if you remain within the guidelines.
You should read the current IOCCC rules, prior to submitting entries. You should read the current [IOCCC rules](rules.html), prior to submitting entries.
The rules are typically sent out with these guidelines. The rules are typically sent out with these guidelines.
@@ -66,31 +68,24 @@ The rules are typically sent out with these guidelines.
**`|`** "prime time". Do you understand why we factored this into the rules and **`|`** "prime time". Do you understand why we factored this into the rules and
**`|`** guidelines? :-) **`|`** guidelines? :-)
Until the start of this IOCCC, these rules, guidelines and iocccsize.c tool Until the start of this IOCCC, these rules, guidelines and iocccsize.c
should be considered provisional BETA versions and may be adjusted (contained in the [mkiocccentry
at any time. toolkit](https://github.com/ioccc-src/mkiocccentry))
tool should be considered provisional **BETA** versions and may be
adjusted **AT ANY TIME**.
**`|`** Even though the contest will start in 2019, because the contest will close **`|`** Even though the contest will start in 2019, because the contest will close
**`|`** in 2020, URLs, subject lines, and contest related email addresses use 2019. **`|`** in 2020, URLs, subject lines, and contest related email addresses use 2019.
The IOCCC submission URL: The IOCCC submission URL is <https://submit.ioccc.org/>.
```
https://submit.ioccc.org/
```
**`|`** The submit URL should be active on or slightly before **2020-Jan-15 12:21:37 UTC**. **`|`** The submit URL should be active on or slightly before **2020-Jan-15 12:21:37 UTC**.
Please wait to submit your entries until after that time. Please wait to submit your entries until after that time.
The official rules, guidelines and iocccsize.c tool will be available The official rules, guidelines and iocccsize.c (invoked by the mkiocccentry) tool will be available
on the official IOCCC website on or slightly before start of this IOCCC. on the official IOCCC website on or slightly before start of this IOCCC.
Please check the IOCCC website "How to enter" link: Please check the IOCCC FAQ [How to submit](../faq#submit).
```
https://www.ioccc.org/index.html#enter
```
on or after the start of this IOCCC to be sure you are using the correct on or after the start of this IOCCC to be sure you are using the correct
versions of these items before using the IOCCC entry submission URL. versions of these items before using the IOCCC entry submission URL.
@@ -280,13 +275,17 @@ to compile compile your code using:
-Wall -Wextra -pedantic -Wall -Wextra -pedantic
``` ```
For compilers, such as clang, that have the -Weverything option, try For compilers, such as clang, that have the `-Weverything` option, try
to make your code compile warning free using: to make your code compile warning free using:
``` ```
-Wall -Wextra -Weverything -pedantic -Wall -Wextra -Weverything -pedantic
``` ```
.. though see [Why do Makefiles use -Weverything with
clang?](../faq.html#faq3_11) in the [FAQ](../faq.html).
If you must turn off various warnings on the compile line such as: If you must turn off various warnings on the compile line such as:
``` ```
@@ -318,7 +317,7 @@ understand the implications of such words.
http://www.bezem.de/pdf/ReservedWordsInC.pdf http://www.bezem.de/pdf/ReservedWordsInC.pdf
``` ```
DO NOT assume that we will use gcc to compile your program. **DO NOT** assume that we will use gcc to compile your program.
We will first try to compile your program using Clang. We will first try to compile your program using Clang.
It is much better to not use any obscure compiler flags if It is much better to not use any obscure compiler flags if
@@ -338,7 +337,7 @@ of nested functions such as:
``` ```
This is because such nested functions often requires one to compile with This is because such nested functions often requires one to compile with
a flag such as -fnested-functions that is not found on some compilers. a flag such as `-fnested-functions` that is not found on some compilers.
On 2012 July 20, the judges rescinded the encouragement of On 2012 July 20, the judges rescinded the encouragement of
nested functions. Such constructions, while interesting and sometimes nested functions. Such constructions, while interesting and sometimes
@@ -349,26 +348,26 @@ actually implemented in commonly used C compilers. Sorry!
**`|`** cat detector vans not withstanding. **`|`** cat detector vans not withstanding.
If your entry uses functions that have a variable number of If your entry uses functions that have a variable number of
arguments, be careful. Systems implement va_list as a wide variety arguments, be careful. Systems implement `va_list` as a wide variety
of ways. Because of this, a number of operations using va_list are of ways. Because of this, a number of operations using `va_list` are
not portable and must not be used: not portable and must not be used:
* assigning a non-va_list variable to/from a va_list variable * assigning a non-`va_list` variable to/from a `va_list` variable
* casting a non-va_list variable into/from a va_list variable * casting a non-`va_list` variable into/from a `va_list` variable
* passing a va_list variable to a function expecting a non-va_list arg * passing a `va_list` variable to a function expecting a non-`va_list` arg
* passing a non-va_list variable to a function expecting a va_list arg * passing a non-`va_list` variable to a function expecting a `va_list` arg
* performing arithmetic on va_list variables * performing arithmetic on `va_list` variables
* using va_list as a structure or union * using `va_list` as a structure or union
In particular, do not treat va_list variables as if they were a char **'s. In particular, do not treat `va_list` variables as if they were a `char **`s.
Avoid using <varargs.h>. Use <stdarg.h> instead. Avoid using `varargs.h`. Use `stdarg.h` instead.
On 28 January 2007, the Judges rescinded the requirement that the On 28 January 2007, the Judges rescinded the requirement that the
'#" in a C preprocessor directive must be the 1st non-whitespace octet. `#` in a C preprocessor directive must be the 1st non-whitespace octet.
The exit() function returns void. Some broken systems have exit() The `exit(3)` function returns void. Some broken systems have `exit(3)`
return int, your entry should assume that exit() returns a void. return `int`, your entry should assume that `exit(3)` returns a `void`.
**`|`** This guideline has a change mark at the very start of this line. **`|`** This guideline has a change mark at the very start of this line.
@@ -458,7 +457,7 @@ There are at least zero judges who think that Fideism has little
or nothing to do with the IOCCC judging process. or nothing to do with the IOCCC judging process.
Don't forget that the building of your program should be done Don't forget that the building of your program should be done
***without human intervention***. So don't do things such as: ***WITHOUT human intervention***. So don't do things such as:
``` ```
prog: prog.c prog: prog.c
@@ -468,7 +467,7 @@ Don't forget that the building of your program should be done
``` ```
However, you can do something cute such as making your program However, you can do something cute such as making your program
do something dumb (or cute) when it is built 'automatically'. And do something dumb (or cute) when it is built 'automatically', and
when it is run with a human involved, do something more clever. when it is run with a human involved, do something more clever.
For example, one could use the build instructions: For example, one could use the build instructions:
@@ -484,16 +483,16 @@ alternate / human intervention based building.
We want to get away from source that is simply a compact blob of We want to get away from source that is simply a compact blob of
octets. Really try to be more creative than blob coding. *HINT!* octets. Really try to be more creative than blob coding. *HINT!*
Please do not use things like gzip to get around the size limit. Please do not use things like `gzip(1)` to get around the size limit.
Please try to be much more creative. Please try to be much more creative.
We really dislike entries that make blatant use of including We really dislike entries that make blatant use of including
large data files to get around the source code size limit. large data files to get around the source code size limit.
We do not recommend submitting systemd source code to the IOCCC, We do not recommend submitting [systemd](https://systemd.io) source code to the IOCCC,
if nothing else because that code is likely to exceed the source code if nothing else because that code is likely to exceed the source code
size limit. This isn't to say that another highly compact and obfuscated size limit. This isn't to say that another highly compact and obfuscated
replacement of init would not be an interesting submission. replacement of `init` would not be an interesting submission.
Did we remember to indicate that programs that blatantly use Did we remember to indicate that programs that blatantly use
some complex state machine to do something simple are boring? some complex state machine to do something simple are boring?
@@ -509,7 +508,7 @@ and/or obfuscated way, would definitely win over the first two!
Remember, you can submit more than one entry. See the rules for details. Remember, you can submit more than one entry. See the rules for details.
We suggest that you avoid trying for the 'smallest self-replicating' We suggest that you avoid trying for the 'smallest self-replicating'
source. The smallest, a zero byte entry, won in 1994. source. The smallest, a zero byte entry, [won in 1994](../1994/smr/index.html).
Programs that claim to be the smallest C source that does something, really Programs that claim to be the smallest C source that does something, really
better be the smallest such program or they risk being rejected because better be the smallest such program or they risk being rejected because
@@ -620,7 +619,7 @@ We think the readers of the contest winners do as well. We do read
the program "remarks" during the judging process, so it is worth your the program "remarks" during the judging process, so it is worth your
while to write remarkable program "remarks". while to write remarkable program "remarks".
We dislike C code with trailing control-M's (\r or \015) that results We dislike C code with trailing control-M's (`\r` or `\015`) that results
in compilation failures. Some non-Unix/non-Linux tools such as in compilation failures. Some non-Unix/non-Linux tools such as
MS Visual C and MS Visual C++ leave trailing control-M's on lines. MS Visual C and MS Visual C++ leave trailing control-M's on lines.
Users of such tools should strip off such control-M's before submitting Users of such tools should strip off such control-M's before submitting
@@ -645,7 +644,7 @@ Instead of unescaped octets, you should use \octal or \hex escapes:
It is a very good idea to, in your remarks file, tell us why you It is a very good idea to, in your remarks file, tell us why you
think your entry is obfuscated. This is particularly true if think your entry is obfuscated. This is particularly true if
your entry is has some very subtle obfuscations that we might your entry is has some very subtle obfuscations that we might
otherwise overlook. <<-- Hint! otherwise overlook. **<<-- Hint!**
Anyone can format their code into a dense blob. A really clever Anyone can format their code into a dense blob. A really clever
author will try format their entry using a "normal" formatting style author will try format their entry using a "normal" formatting style
@@ -815,12 +814,12 @@ guidelines are written in obfuscated form.
# JUDGING PROCESS: # JUDGING PROCESS:
Entries are judged by Leonid A. Broukhis, Simon Cooper, Landon Curt Noll. Entries are judged by Leonid A. Broukhis and Landon Curt Noll.
Each entry submitted is given a random id number and subdirectory. The Each entry submitted is given a random id number and subdirectory. The
entry files including, but not limited to prog.c, Makefile (that we entry files including, but not limited to prog.c, Makefile (that we
form from around your "how to build" information), as well as any form from around your "how to build" information), as well as any
data files that you submit are all placed under their own directory. data files that you submit are all placed under their own directory
stored and judged from this directory. stored and judged from this directory.
Any information about the authors is not read by the judges until Any information about the authors is not read by the judges until
@@ -838,7 +837,7 @@ and outside the scope of the above paragraph.
Some people, in the past, have attempted to obfuscate their identity by Some people, in the past, have attempted to obfuscate their identity by
including comments of famous Internet personalities such as Peter Honeyman including comments of famous Internet personalities such as Peter Honeyman
(http://www.citi.umich.edu/u/honey/). The judges are on to this (<http://www.citi.umich.edu/u/honey/>). The judges are on to this
trick and therefore consider any obfuscated source or data file trick and therefore consider any obfuscated source or data file
claiming to be from Honeyman to not be form Honeyman. This of course claiming to be from Honeyman to not be form Honeyman. This of course
creates an interesting paradox known as the "obfuscated Peter Honeyman creates an interesting paradox known as the "obfuscated Peter Honeyman
@@ -853,7 +852,7 @@ did submit an entry in the past. In the past, Peter had denied
submitting anything to the IOCCC. Perhaps those entries were submitting anything to the IOCCC. Perhaps those entries were
submitted by one of his students? submitted by one of his students?
Hopefully we are very CLEAR on this point! The rules now strongly state: Hopefully we are **VERY CLEAR** on this point! The rules now strongly state:
PLEASE DO NOT put a name of an author, in an obvious way, into your PLEASE DO NOT put a name of an author, in an obvious way, into your
source code, remarks, data files, etc. The above "Peter Honeyman is source code, remarks, data files, etc. The above "Peter Honeyman is
exempt" not withstanding. exempt" not withstanding.
@@ -870,7 +869,7 @@ attempts to send non-winners into oblivion. We remove all non-winning
files, and shred all related paper. By tradition, we do not even files, and shred all related paper. By tradition, we do not even
reveal the number of entries that we received. reveal the number of entries that we received.
During the judging process. a process that spans multiple sessions During the judging process, a process that spans multiple sessions
over a few weeks, post general updates from our @IOCCC twitter account. over a few weeks, post general updates from our @IOCCC twitter account.
Once we have selected the winners, for each category we will tweet: Once we have selected the winners, for each category we will tweet:
@@ -891,23 +890,14 @@ This is done prior to posting the winners to the wide world.
## An important 2023 update to how winners are announced ## An important 2023 update to how winners are announced
The IOCCC no longer uses twitter. IOCCC entries will be announced The IOCCC no longer uses twitter. IOCCC entries will be announced
by a git commit to the IOCCC entries repo: by a git commit to the [IOCCC entries
repo](https://github.com/ioccc-src/winner).
``` that, in turn, updates the [official IOCCC
https://github.com/ioccc-src/winner website](https://www.ioccc.org/index.html).
```
that, in turn, updates the offivial IOCCC website: In addition a note is posted to the IOCCC Mastodon account
(<https://fosstodon.org/@ioccc>).
```
https://www.ioccc.org/index.html
```
In addition a note is posted to the IOCCC Mastodon account:
```
https://fosstodon.org/@ioccc
```
## Back to the Judging process ## Back to the Judging process
@@ -1085,7 +1075,7 @@ In addition a note is posted to the IOCCC Mastodon account:
``` ```
## Back to annoucement of winners ## Back to announcement of winners
It is pointless to ask the IOCCC judges how many entries we receive. It is pointless to ask the IOCCC judges how many entries we receive.
Other government TLA or FLA snooping organizations are prohibited from Other government TLA or FLA snooping organizations are prohibited from
@@ -1103,10 +1093,10 @@ Last, but not least, winners receive international fame and flames! :-)
You may contact the judges by sending email to the following address: You may contact the judges by sending email to the following address:
``` ```
| q.2020@ioccc.org (do not submit entries to this address) | q.2024@ioccc.org (do not submit entries to this address)
``` ```
**`|`** You must include the words 'ioccc 2020 question' in the subject of your **`|`** You must include the words 'ioccc 2024 question' in the subject of your
email message when sending email to the judges. email message when sending email to the judges.
Questions and comments about the contest are welcome. Comments about Questions and comments about the contest are welcome. Comments about
next/rules.html
+71 -51
View File
@@ -384,7 +384,7 @@
<!-- BEFORE: 1st line of markdown file: next/rules.md --> <!-- BEFORE: 1st line of markdown file: next/rules.md -->
<!-- START: this line starts content from: inc/rules.closed.hdr --> <!-- START: this line starts content from: inc/rules.closed.hdr -->
<h1 id="warning-these-rules-are-out-of-date">WARNING: These rules are OUT OF DATE</h1> <h1 id="warning-these-rules-are-out-of-date">WARNING: These rules are OUT OF DATE</h1>
<p>They are a <strong>very tentative proposal</strong> for the next IOCCC <p>These rules are a <strong>very tentative proposal</strong> for the next IOCCC
that is <strong>VERY LIKELY</strong> to be updated before the next IOCCC. that is <strong>VERY LIKELY</strong> to be updated before the next IOCCC.
They are are provided as a <strong>very tentative</strong> hint at what They are are provided as a <strong>very tentative</strong> hint at what
might be used in a future IOCCC.</p> might be used in a future IOCCC.</p>
@@ -396,18 +396,19 @@ might be used in a future IOCCC.</p>
<a href="https://fosstodon.org/@ioccc"><span class="citation" data-cites="IOCCC">@IOCCC</span> mastodon feed</a> for information about future IOCCC openings.</p> <a href="https://fosstodon.org/@ioccc"><span class="citation" data-cites="IOCCC">@IOCCC</span> mastodon feed</a> for information about future IOCCC openings.</p>
<!-- END: the next line ends content from: inc/rules.closed.hdr --> <!-- END: the next line ends content from: inc/rules.closed.hdr -->
<!-- This is the last line modified by the tool: bin/gen-status.sh --> <!-- This is the last line modified by the tool: bin/gen-status.sh -->
<h1 id="th-international-obfuscated-c-code-contest-official-rules">27th International Obfuscated C Code Contest Official Rules</h1> <h1 id="th-international-obfuscated-c-code-contest-official-rules">28th International Obfuscated C Code Contest Official Rules</h1>
<p><strong><code>|</code></strong> Copyright © 2024 Leonid A. Broukhis, Landon Curt Noll.</p> <p><strong><code>|</code></strong> Copyright © 2024 Leonid A. Broukhis, Landon Curt Noll.</p>
<p>All Rights Reserved. Permission for personal, education or non-profit use is <p>All Rights Reserved. Permission for personal, education or non-profit use is
granted provided this this copyright and notice are included in its entirety granted provided this this copyright and notice are included in its entirety
and remains unaltered. All other uses must receive prior permission in and remains unaltered. All other uses must receive prior permission in
writing from the <a href="../contact.html">contest judges</a>.</p> writing by <a href="../contact.html">contacting the judges</a>.</p>
<h2 id="rules-version">Rules version</h2> <h2 id="rules-version">Rules version</h2>
<p><strong><code>|</code></strong> These rules are version <strong>2024-04-04-v28</strong>.</p> <p><strong><code>|</code></strong> These rules are version <strong>2024-04-04-v28</strong>.</p>
<p><strong>IMPORTANT</strong>: Be sure to read the <a href="guidelines.html">IOCCC guidelines</a>.</p> <p><strong>IMPORTANT</strong>: Be sure to read the <a href="guidelines.html">IOCCC guidelines</a>.</p>
<h3 id="change-marks">Change marks</h3> <h3 id="change-marks">Change marks</h3>
<p><strong><code>|</code></strong> <strong>← Lines that start with this symbol indicate a change from the previous IOCCC</strong></p> <p><strong><code>|</code></strong> <strong>← Lines that start with this symbol indicate a change from the previous IOCCC</strong></p>
<p>Most lines (we sometimes make mistakes) that were modified start the <strong><code>|</code></strong> symbol.</p> <p>Most lines (we sometimes make mistakes) that were modified since the previous
IOCCC start the <strong><code>|</code></strong> symbol.</p>
<h1 id="obfuscate-defined">Obfuscate defined:</h1> <h1 id="obfuscate-defined">Obfuscate defined:</h1>
<p>tr.v. -cated, -cating, -cates. <p>tr.v. -cated, -cating, -cates.
<BR><BR> <BR><BR>
@@ -429,8 +430,11 @@ writing from the <a href="../contact.html">contest judges</a>.</p>
<h1 id="important-ioccc-dates">Important IOCCC dates</h1> <h1 id="important-ioccc-dates">Important IOCCC dates</h1>
<p><strong><code>|</code></strong> This IOCCC runs from <strong>2019-Dec-26 06:01:41 UTC</strong> to <strong>2020-Mar-15 06:26:49 UTC</strong>.</p> <p><strong><code>|</code></strong> This IOCCC runs from <strong>2019-Dec-26 06:01:41 UTC</strong> to <strong>2020-Mar-15 06:26:49 UTC</strong>.</p>
<p>Until the start of this IOCCC, these rules, guidelines and iocccsize.c <p>Until the start of this IOCCC, these rules, guidelines and iocccsize.c
tool should be considered provisional BETA versions and may be (contained in the <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry
adjusted at any time.</p> toolkit</a> and invoked by the
<code>mkiocccentry</code> tool)
should be considered provisional <strong>BETA</strong> versions and may be
adjusted <strong>AT ANY TIME</strong>.</p>
<p>When the IOCCC is open, the submission URL is: <p>When the IOCCC is open, the submission URL is:
<a href="https://submit.ioccc.org/">https://submit.ioccc.org/</a>, at all other <a href="https://submit.ioccc.org/">https://submit.ioccc.org/</a>, at all other
times that link is likely to be unresponsive.</p> times that link is likely to be unresponsive.</p>
@@ -438,8 +442,10 @@ times that link is likely to be unresponsive.</p>
for <strong>important information</strong> on how to submit to the IOCCC.</p> for <strong>important information</strong> on how to submit to the IOCCC.</p>
<p><strong><code>|</code></strong> The submit URL should be active on or slightly before <strong>2020-Jan-15 12:21:37 UTC</strong>. <p><strong><code>|</code></strong> The submit URL should be active on or slightly before <strong>2020-Jan-15 12:21:37 UTC</strong>.
Please wait to submit your entries until after that time.</p> Please wait to submit your entries until after that time.</p>
<p>The official rules, guidelines and iocccsize.c tool will be available <p>The official rules, guidelines will be available on the <a href="../index.html">official IOCCC
on the official IOCCC website on or slightly before start of this IOCCC.</p> website</a> on or slightly before start of this IOCCC. The
<code>mkiocccentry</code> toolkit may be obtained at any time at the
<a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry toolkit repo</a>.</p>
<p>Please recheck on or after the start of this IOCCC to be sure you <p>Please recheck on or after the start of this IOCCC to be sure you
are using the correct versions of these items before using the IOCCC are using the correct versions of these items before using the IOCCC
entry submission URL.</p> entry submission URL.</p>
@@ -450,19 +456,21 @@ entry submission URL.</p>
<h2 id="rule-1">Rule 1</h2> <h2 id="rule-1">Rule 1</h2>
<p>Your entry must be a complete program.</p> <p>Your entry must be a complete program.</p>
<h2 id="rule-2">Rule 2</h2> <h2 id="rule-2">Rule 2</h2>
<p><strong><code>|</code></strong> The size rule requires your entry to satisfy BOTH rule 2a and rule 2b:</p> <p><strong><code>|</code></strong> The size rule requires your entry to satisfy <strong>BOTH</strong> rule 2a and rule 2b:</p>
<h2 id="rule-2a">Rule 2a</h2> <h2 id="rule-2a">Rule 2a</h2>
<p>The size of your program source <strong>must be &lt;= 4096 bytes</strong>in length.</p> <p>The size of your program source <strong>MUST BE &lt;= 4096 bytes</strong>in length.</p>
<h2 id="rule-2b">Rule 2b</h2> <h2 id="rule-2b">Rule 2b</h2>
<p>When your program source is fed as input to the current IOCCC size <p>When your program source is fed as input to the current IOCCC size
tool, and the IOCCC size tool -i command line option is used, the tool, and the IOCCC size tool -i command line option is used, the
value printed <strong>shall not exceed 2053</strong>.</p> value printed <strong>shall not exceed 2053</strong>.</p>
<p><strong><code>|</code></strong> The source to the current IOCCC size tool is found in the <p><strong><code>|</code></strong> The source to the current IOCCC size tool is found in the
<a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry tool repo</a>.</p> <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry tool repo</a>. If you use
the <code>mkiocccentry</code> tool (which we <strong>STRONGLY recommend you do</strong>) will invoke
this tool before packaging your entry for submission.</p>
<h2 id="rule-3">Rule 3</h2> <h2 id="rule-3">Rule 3</h2>
<p>Submissions should be performed using the instructions outlined at: <p>Submissions should be performed using the instructions outlined at:
the <a href="../faq.html#submit">How to enter link</a> link.</p> the <a href="../faq.html#submit">How to enter link</a> link.</p>
<p>To submit to an open IOCCC, you must the <a href="https://submit.ioccc.org/">IOCCC submit server</a>.</p> <p>To submit to an open IOCCC, you must use the <a href="https://submit.ioccc.org/">IOCCC submit server</a>.</p>
<p>When the IOCCC is not open, that link will likely be unresponsive.</p> <p>When the IOCCC is not open, that link will likely be unresponsive.</p>
<p><strong><code>|</code></strong> The submit URL should be active on or slightly before <strong>2020-Jan-15 12:21:37 UTC</strong>. <p><strong><code>|</code></strong> The submit URL should be active on or slightly before <strong>2020-Jan-15 12:21:37 UTC</strong>.
Please wait to submit your entries until after that time.</p> Please wait to submit your entries until after that time.</p>
@@ -472,52 +480,53 @@ Please wait to submit your entries until after that time.</p>
<p>Your source code will be the file <strong>prog.c</strong>. The compiled binary <p>Your source code will be the file <strong>prog.c</strong>. The compiled binary
will be called <strong>prog</strong>.</p> will be called <strong>prog</strong>.</p>
<h2 id="rule-5">Rule 5</h2> <h2 id="rule-5">Rule 5</h2>
<p>Your entry must not modify the content or filename of any part of your <p>Your entry <strong>MUST</strong> not modify the content or filename of any part of your
original entry including, but not limited to prog.c, the Makefile original entry including, but not limited to <strong>prog.c</strong>, the <strong>Makefile</strong>
(we create from your how to build instructions), as well as any data (that we create from your how to build instructions), as well as any data
files you submit.</p> files you submit.</p>
<p>If you entry wishes to modify such content, it must first copy the <p>If you entry wishes to modify such content, it <strong>MUST</strong> first copy the
file to a new filename and then modify that copy.</p> file to a new filename and then modify that copy.</p>
<h2 id="rule-6">Rule 6</h2> <h2 id="rule-6">Rule 6</h2>
<p><strong><code>|</code></strong> I am not a rule, I am a free(void *man)!</p> <p><strong><code>|</code></strong> I am not a rule, I am a <code>free(void \*man)</code>!</p>
<pre><code> while (!understand(ioccc(rule(you(are(number(6))))))) { ha_ha_ha(); }</code></pre> <pre><code> while (!understand(ioccc(rule(you(are(number(6))))))) { ha_ha_ha(); }</code></pre>
<h2 id="rule-7">Rule 7</h2> <h2 id="rule-7">Rule 7</h2>
<p>The obfuscated C program must be an original work that you own.</p> <p>The obfuscated C program must be an original work that you own.</p>
<p>You (the authors) must own the contents of your submission OR <p>You (the author(s)) must own the contents of your submission OR
you must have permission from the owners to submit their content you must have permission from the owner(s) to submit their content
under the following license:</p> under the following license:</p>
<p><strong><code>|</code></strong> <strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong></p> <p><strong><code>|</code></strong> <strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong></p>
<p>See also Rule 18.</p> <p>See also Rule 18.</p>
<p>If you submit any content that is owned by others, you MUST <p>If you submit any content that is owned by others, you <strong>MUST</strong>
detail that ownership (i.e., who owns what) and document the detail that ownership (i.e., who owns what) and document the
permission you obtained.</p> permission you obtained.</p>
<p>Please note that the IOCCC size tool is not an original work.</p> <p>Please note that the IOCCC size tool is <strong>NOT</strong> an original work.</p>
<h2 id="rule-8">Rule 8</h2> <h2 id="rule-8">Rule 8</h2>
<p><strong><code>|</code></strong> Entries must be received prior to the end of this IOCCC which is:</p> <p><strong><code>|</code></strong> Entries must be received prior to the end of this IOCCC which is:</p>
<pre><code> 2020-Mar-15 06:26:49 UTC</code></pre> <pre><code> 2020-Mar-15 06:26:49 UTC</code></pre>
<p>A confirmation of submission will be sent to the submitter email address before the close of the contest.</p> <p>A confirmation of submission will be sent to the submitting email address
before the close of the contest.</p>
<h2 id="rule-9">Rule 9</h2> <h2 id="rule-9">Rule 9</h2>
<p><strong><code>|</code></strong> Each person may submit up to and including 8.000000 entries per contest.</p> <p><strong><code>|</code></strong> Each person may submit up to and including 8.000000 entries per contest.</p>
<p>Each entry must be submitted separately.</p> <p>Each entry must be submitted separately.</p>
<h2 id="rule-10">Rule 10</h2> <h2 id="rule-10">Rule 10</h2>
<p>Entries requiring human interaction to be initially compiled are not permitted.</p> <p>Entries requiring human interaction to be initially compiled are not permitted.</p>
<h2 id="rule-11">Rule 11</h2> <h2 id="rule-11">Rule 11</h2>
<p>Programs that require special privileges (setuid, setgid, super-user, <p>Programs that require special privileges (<code>setuid(2)</code>, <code>setgid(2)</code>, super-user,
special owner, special group, etc.) are still highly discouraged. We special owner, special group, etc.) are still highly discouraged. We
do not guarantee these functions will behave as you expect on our test do not guarantee these functions will behave as you expect on our test
platforms. If your program needs special permissions please document platforms. If your program needs special permissions <strong>please</strong> document
them in the remarks file.</p> them in the remarks file.</p>
<h2 id="rule-12">Rule 12</h2> <h2 id="rule-12">Rule 12</h2>
<p>Legal abuse of the rules is somewhat encouraged. An entry that, in <p>Legal abuse of the rules is somewhat encouraged. An entry that, in
the opinion of the judges, violates the rules will be disqualified. the opinion of the judges, violates the rules will be disqualified.
Entries that attempt to abuse the rules must try to justify why Entries that attempt to abuse the rules <strong>MUST</strong> try to justify why
their rule abuse is legal in the remarks file.</p> their rule abuse is legal, in the remarks file.</p>
<h2 id="rule-13">Rule 13</h2> <h2 id="rule-13">Rule 13</h2>
<p>Any C source that fails to compile because of unescaped octets with <p>Any C source that fails to compile because of unescaped octets with
the high bit set (octet value &gt;= 128) will be rejected.</p> the high bit set (octet value &gt;= 128) will be rejected.</p>
<h2 id="rule-14">Rule 14</h2> <h2 id="rule-14">Rule 14</h2>
<p>Any C source that fails to compile because of lines with trailing <p>Any C source that fails to compile because of lines with trailing
control-M’s (i.e., lines with a tailing octet 015) will be rejected.</p> control-M’s (i.e., lines with a tailing octet <code>015</code>) will be rejected.</p>
<p>Please do not put trailing control-M’s on remarks file lines. <p>Please do not put trailing control-M’s on remarks file lines.
Please check to be sure, before submitting, that you have removed Please check to be sure, before submitting, that you have removed
any control-M at the end of remark file lines.</p> any control-M at the end of remark file lines.</p>
@@ -535,55 +544,67 @@ submission.</p>
<p>After your email address has been confirmed, the submission code will <p>After your email address has been confirmed, the submission code will
be valid for submitting and editing the entry for the lifetime of the be valid for submitting and editing the entry for the lifetime of the
competition.</p> competition.</p>
<p>See also <a href="../faq.html#submit">How may I submit to the IOCCC?</a> in the
<a href="../faq.html">FAQ</a>.</p>
<h2 id="rule-16">Rule 16</h2> <h2 id="rule-16">Rule 16</h2>
<p>You are STRONGLY encouraged to submit a previously unpublished and <p>You are <strong>STRONGLY</strong> encouraged to submit a previously unpublished and
original entry. Submissions that are similar to previous entries are original entry. Submissions that are similar to previous entries are
discouraged. As we judge anonymously, submissions that have already discouraged. As we judge anonymously, submissions that have already
been published may be disqualified.</p> been published may be disqualified.</p>
<h2 id="rule-17">Rule 17</h2> <h2 id="rule-17">Rule 17</h2>
<p>The total size of your submission: the sum of the size of the program, <p>The total size of your submission: the sum of the size of the program,
hints, comments, build and info files MUST be less than or equal hints, comments, build and info files <strong>MUST</strong> be less than or equal
to 1048576 octets in size.</p> to 1048576 octets in size. The
[mkiocccentry toolkit]((https://github.com/ioccc-src/mkiocccentry) will verify
that your entry is not too big.</p>
<h2 id="rule-18">Rule 18</h2> <h2 id="rule-18">Rule 18</h2>
<p>The entirety of your entry must be submitted under the following license:</p> <p>The entirety of your entry must be submitted under the following license:</p>
<p><strong><code>|</code></strong> <strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong></p> <p><strong><code>|</code></strong> <strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong></p>
<p>You (the authors) must own the contents of your submission OR <p>You (the author(s)) <strong>MUST</strong> own the contents of your submission <strong>OR</strong>
you must have permission from the owners to submit their content</p> you <strong>MUST</strong> have permission from the owner(s) to submit their content.</p>
<p>You must not submit anything that cannot be submitted under that license.</p> <p>You must not submit anything that cannot be submitted under that license.</p>
<h2 id="rule-19">Rule 19</h2> <h2 id="rule-19">Rule 19</h2>
<p>The remarks file must be written in markdown format. See <p>The remarks file must be written in markdown format. See
the Daring Fireball {Markdown: Basics](http://daringfireball.net/projects/markdown/basics) the Daring Fireball <a href="http://daringfireball.net/projects/markdown/basics">Markdown: Basics</a>
for more information.</p> for more information.</p>
<p><strong><code>|</code></strong> We currently use <a href="https://pandoc.org">pandoc</a> to convert markdown to HTML.</p> <p><strong><code>|</code></strong> We currently use <a href="https://pandoc.org">pandoc</a> to convert markdown to HTML.</p>
<h2 id="rule-20">Rule 20</h2> <h2 id="rule-20">Rule 20</h2>
<p>The how to build instructions must be in make form.</p> <p>The how to build instructions must be in Makefile format. See <a href="../faq.html#make_compatibility">What kind of
<p>The target of the make file must be called prog. The original make(1) compatibility does the IOCCC support and will it support other
C source file must be called prog.c.</p> kinds?</a> for more details on what we support.</p>
<p>The target of the Makefile must be called <code>prog</code>. The original
C source file must be called <code>prog.c</code>.</p>
<p>To invoke the C compiler, use <code>${CC}</code>. <p>To invoke the C compiler, use <code>${CC}</code>.
To invoke the C preprocessor use <code>${CPP}</code>.</p> To invoke the C preprocessor use <code>${CPP}</code>.</p>
<p>Do not assume that . (the current directory) is in the <code>$PATH</code>.</p> <p>Do not assume that <code>.</code> (the current directory) is in the <code>$PATH</code>.</p>
<p>Use a shell command syntax that is compatible with bash.</p> <p>Use a shell command syntax that is compatible with bash.</p>
<p>Assume that commands commonly found in POSIX-like / Linux-like systems <p>Assume that commands commonly found in POSIX-like / Linux-like systems
are available in the search path.</p> are available in the search path.</p>
<p>Do not assume any particular given value of <code>${CFLAGS}</code> or other <p>Do not assume any particular given value of <code>${CFLAGS}</code> or other
commonly used make variables.</p> commonly used make variables. In other words you <strong>MUST</strong> specify the <code>CFLAGS</code>
to use.</p>
<p>See also the
<a href="https://github.com/ioccc-src/mkiocccentry/blob/master/Makefile.example">Makefile.example</a>
for help in constructing your Makefile. The <code>mkiocccentry</code>, which can be found
at the <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry repo</a>, tries to
detect if required rules exist in your Makefile.</p>
<h2 id="rule-21">Rule 21</h2> <h2 id="rule-21">Rule 21</h2>
<p>Your entry must not create nor modify files above the current directory <p>Your entry must not create or modify files above the current directory
with the exception of the <code>/tmp</code> and the <code>/var/tmp</code> directories. Your entry with the exception of the <code>/tmp</code> and the <code>/var/tmp</code> directories. Your entry
may create subdirectories below the current directory, or in /tmp, <strong>MAY</strong> create subdirectories below the current directory, or in <code>/tmp</code>,
or in <code>/var/tmp</code> provided that “<strong>.</strong>” is <strong>not</strong> the first octet in any or in <code>/var/tmp</code> provided that “<strong>.</strong>” is <strong>NOT</strong> the first octet in any
directory name.</p> directory name or filename you submit.</p>
<h2 id="rule-22">Rule 22</h2> <h2 id="rule-22">Rule 22</h2>
<p>Catch 22:</p> <p>Catch 22:</p>
<p>Your source code, data files, remarks and program output must <strong>NOT</strong> <p>Your source code, data files, remarks and program output must <strong>NOT</strong>
identify the authors of your code. The judges <strong>STRONGLY prefer</strong> to identify the authors of your code. The judges <strong>STRONGLY prefer</strong> to
not know who is submitting entries to the IOCCC.</p> NOT know who is submitting entries to the IOCCC.</p>
<p>Even if you are a previous IOCCC winner, catch 22 still applies.</p> <p>Even if you are a previous IOCCC winner, catch 22 still applies.</p>
<p>Identifying the authors of your entry in an obvious way anywhere <p>Identifying the author(s) of your entry in an obvious way anywhere
within in your code, data, remarks or program output (unless you are within your code, data, remarks or program output (unless you are
<em>Peter Honeyman</em> or pretending to be <em>Peter Honeyman</em>) will be grounds <em>Peter Honeyman</em> or pretending to be <em>Peter Honeyman</em>) will be grounds
for disqualification of your entry.</p> for disqualification of your entry.</p>
<p>Yes, Virginia, <strong>we really mean it</strong>!</p> <p>Yes, Virginia, <strong>we REALLY mean it</strong>!</p>
<h2 id="rule-23">Rule 23</h2> <h2 id="rule-23">Rule 23</h2>
<p>This prime rule number is reserved for future use.</p> <p>This prime rule number is reserved for future use.</p>
<h2 id="rule-24">Rule 24</h2> <h2 id="rule-24">Rule 24</h2>
@@ -593,11 +614,11 @@ for disqualification of your entry.</p>
<h2 id="rule-26">Rule 26</h2> <h2 id="rule-26">Rule 26</h2>
<p><strong><code>|</code></strong> Rule 26 is also a rule.</p> <p><strong><code>|</code></strong> Rule 26 is also a rule.</p>
<h1 id="for-more-information">FOR MORE INFORMATION:</h1> <h1 id="for-more-information">FOR MORE INFORMATION:</h1>
<p>The judging will be done by Leonid A. Broukhis, Simon Cooper, <p>The judging will be done by Leonid A. Broukhis and
Landon Curt Noll.</p> Landon Curt Noll.</p>
<p><strong><code>|</code></strong> Please send questions or comments about the contest, to:</p> <p><strong><code>|</code></strong> Please send questions or comments about the contest, to:</p>
<pre><code> q.2020@ioccc.org</code></pre> <pre><code> q.2024@ioccc.org</code></pre>
<p><strong><code>|</code></strong> <strong>IMPORANT</strong>: You must include the words <strong>ioccc 2020 question</strong> <p><strong><code>|</code></strong> <strong>IMPORTANT</strong>: You must include the words <strong>ioccc 2024 question</strong>
in the subject of your email message when sending email to the judges.</p> in the subject of your email message when sending email to the judges.</p>
<p>The rules and the guidelines may (and often do) change from year to <p>The rules and the guidelines may (and often do) change from year to
year. You should be sure you have the current rules and guidelines year. You should be sure you have the current rules and guidelines
@@ -613,12 +634,11 @@ to be sure they are seeing the most recent tweets.</p>
<h2 id="an-important-update-to-this-historic-note">An important update to this historic note</h2> <h2 id="an-important-update-to-this-historic-note">An important update to this historic note</h2>
<p><strong>-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-</strong></p> <p><strong>-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-</strong></p>
<p><strong><code>|</code></strong> <strong>The IOCCC no longer uses twitter</strong>.</p> <p><strong><code>|</code></strong> <strong>The IOCCC no longer uses twitter</strong>.</p>
<p><strong><code>|</code></strong> Today the <a href="../contact.html#mastodon">IOCCC uses Mastodon</a>.</p> <p><strong><code>|</code></strong> Today the <a href="../contact.html#try_mastodon">IOCCC uses Mastodon</a>.</p>
<p><strong><code>|</code></strong> For more information and to see our IOCCC Mastodon posts, see:</p> <p><strong><code>|</code></strong> For more information and to see our IOCCC Mastodon posts, see:</p>
<pre><code> https://fosstodon.org/@ioccc</code></pre> <pre><code> https://fosstodon.org/@ioccc</code></pre>
<p><strong>-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-</strong></p> <p><strong>-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-</strong></p>
<p>Leonid A. Broukhis<br> <p>Leonid A. Broukhis<br>
Simon Cooper<br>
chongo (Landon Curt Noll) <code>/\cc/\</code></p> chongo (Landon Curt Noll) <code>/\cc/\</code></p>
<hr style="width:10%;text-align:left;margin-left:0"> <hr style="width:10%;text-align:left;margin-left:0">
<p>Jump to: <a href="#">top</a> <p>Jump to: <a href="#">top</a>
next/rules.md
+73 -52
View File
@@ -2,7 +2,7 @@
# WARNING: These rules are OUT OF DATE # WARNING: These rules are OUT OF DATE
They are a **very tentative proposal** for the next IOCCC These rules are a **very tentative proposal** for the next IOCCC
that is **VERY LIKELY** to be updated before the next IOCCC. that is **VERY LIKELY** to be updated before the next IOCCC.
They are are provided as a **very tentative** hint at what They are are provided as a **very tentative** hint at what
might be used in a future IOCCC. might be used in a future IOCCC.
@@ -20,14 +20,14 @@ Watch both [the IOCCC status page](../status.html) and the
<!-- END: the next line ends content from: inc/rules.closed.hdr --> <!-- END: the next line ends content from: inc/rules.closed.hdr -->
<!-- This is the last line modified by the tool: bin/gen-status.sh --> <!-- This is the last line modified by the tool: bin/gen-status.sh -->
# 27th International Obfuscated C Code Contest Official Rules # 28th International Obfuscated C Code Contest Official Rules
**`|`** Copyright &copy; 2024 Leonid A. Broukhis, Landon Curt Noll. **`|`** Copyright &copy; 2024 Leonid A. Broukhis, Landon Curt Noll.
All Rights Reserved. Permission for personal, education or non-profit use is All Rights Reserved. Permission for personal, education or non-profit use is
granted provided this this copyright and notice are included in its entirety granted provided this this copyright and notice are included in its entirety
and remains unaltered. All other uses must receive prior permission in and remains unaltered. All other uses must receive prior permission in
writing from the [contest judges](../contact.html). writing by [contacting the judges](../contact.html).
## Rules version ## Rules version
@@ -41,7 +41,8 @@ writing from the [contest judges](../contact.html).
**`|`** **&larr; Lines that start with this symbol indicate a change from the previous IOCCC** **`|`** **&larr; Lines that start with this symbol indicate a change from the previous IOCCC**
Most lines (we sometimes make mistakes) that were modified start the **`|`** symbol. Most lines (we sometimes make mistakes) that were modified since the previous
IOCCC start the **`|`** symbol.
# Obfuscate defined: # Obfuscate defined:
@@ -72,8 +73,11 @@ The goals of the IOCCC:
**`|`** This IOCCC runs from **2019-Dec-26 06:01:41 UTC** to **2020-Mar-15 06:26:49 UTC**. **`|`** This IOCCC runs from **2019-Dec-26 06:01:41 UTC** to **2020-Mar-15 06:26:49 UTC**.
Until the start of this IOCCC, these rules, guidelines and iocccsize.c Until the start of this IOCCC, these rules, guidelines and iocccsize.c
tool should be considered provisional BETA versions and may be (contained in the [mkiocccentry
adjusted at any time. toolkit](https://github.com/ioccc-src/mkiocccentry) and invoked by the
`mkiocccentry` tool)
should be considered provisional **BETA** versions and may be
adjusted **AT ANY TIME**.
When the IOCCC is open, the submission URL is: When the IOCCC is open, the submission URL is:
[https://submit.ioccc.org/](https://submit.ioccc.org/), at all other [https://submit.ioccc.org/](https://submit.ioccc.org/), at all other
@@ -85,9 +89,10 @@ for **important information** on how to submit to the IOCCC.
**`|`** The submit URL should be active on or slightly before **2020-Jan-15 12:21:37 UTC**. **`|`** The submit URL should be active on or slightly before **2020-Jan-15 12:21:37 UTC**.
Please wait to submit your entries until after that time. Please wait to submit your entries until after that time.
The official rules, guidelines and iocccsize.c tool will be available The official rules, guidelines will be available on the [official IOCCC
on the official IOCCC website on or slightly before start of this IOCCC. website](../index.html) on or slightly before start of this IOCCC. The
`mkiocccentry` toolkit may be obtained at any time at the
[mkiocccentry toolkit repo](https://github.com/ioccc-src/mkiocccentry).
Please recheck on or after the start of this IOCCC to be sure you Please recheck on or after the start of this IOCCC to be sure you
are using the correct versions of these items before using the IOCCC are using the correct versions of these items before using the IOCCC
@@ -111,12 +116,12 @@ Your entry must be a complete program.
## Rule 2 ## Rule 2
**`|`** The size rule requires your entry to satisfy BOTH rule 2a and rule 2b: **`|`** The size rule requires your entry to satisfy **BOTH** rule 2a and rule 2b:
## Rule 2a ## Rule 2a
The size of your program source **must be <= 4096 bytes**in length. The size of your program source **MUST BE <= 4096 bytes**in length.
## Rule 2b ## Rule 2b
@@ -125,7 +130,9 @@ tool, and the IOCCC size tool -i command line option is used, the
value printed **shall not exceed 2053**. value printed **shall not exceed 2053**.
**`|`** The source to the current IOCCC size tool is found in the **`|`** The source to the current IOCCC size tool is found in the
[mkiocccentry tool repo](https://github.com/ioccc-src/mkiocccentry). [mkiocccentry tool repo](https://github.com/ioccc-src/mkiocccentry). If you use
the `mkiocccentry` tool (which we **STRONGLY recommend you do**) will invoke
this tool before packaging your entry for submission.
## Rule 3 ## Rule 3
@@ -133,7 +140,7 @@ value printed **shall not exceed 2053**.
Submissions should be performed using the instructions outlined at: Submissions should be performed using the instructions outlined at:
the [How to enter link](../faq.html#submit) link. the [How to enter link](../faq.html#submit) link.
To submit to an open IOCCC, you must the [IOCCC submit server](https://submit.ioccc.org/). To submit to an open IOCCC, you must use the [IOCCC submit server](https://submit.ioccc.org/).
When the IOCCC is not open, that link will likely be unresponsive. When the IOCCC is not open, that link will likely be unresponsive.
@@ -153,18 +160,18 @@ will be called **prog**.
## Rule 5 ## Rule 5
Your entry must not modify the content or filename of any part of your Your entry **MUST** not modify the content or filename of any part of your
original entry including, but not limited to prog.c, the Makefile original entry including, but not limited to **prog.c**, the **Makefile**
(we create from your how to build instructions), as well as any data (that we create from your how to build instructions), as well as any data
files you submit. files you submit.
If you entry wishes to modify such content, it must first copy the If you entry wishes to modify such content, it **MUST** first copy the
file to a new filename and then modify that copy. file to a new filename and then modify that copy.
## Rule 6 ## Rule 6
**`|`** I am not a rule, I am a free(void \*man)! **`|`** I am not a rule, I am a `free(void \*man)`!
``` <!---c--> ``` <!---c-->
while (!understand(ioccc(rule(you(are(number(6))))))) { ha_ha_ha(); } while (!understand(ioccc(rule(you(are(number(6))))))) { ha_ha_ha(); }
@@ -175,19 +182,19 @@ file to a new filename and then modify that copy.
The obfuscated C program must be an original work that you own. The obfuscated C program must be an original work that you own.
You (the authors) must own the contents of your submission OR You (the author(s)) must own the contents of your submission OR
you must have permission from the owners to submit their content you must have permission from the owner(s) to submit their content
under the following license: under the following license:
**`|`** **[CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/)** **`|`** **[CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/)**
See also Rule 18. See also Rule 18.
If you submit any content that is owned by others, you MUST If you submit any content that is owned by others, you **MUST**
detail that ownership (i.e., who owns what) and document the detail that ownership (i.e., who owns what) and document the
permission you obtained. permission you obtained.
Please note that the IOCCC size tool is not an original work. Please note that the IOCCC size tool is **NOT** an original work.
## Rule 8 ## Rule 8
@@ -198,7 +205,8 @@ Please note that the IOCCC size tool is not an original work.
2020-Mar-15 06:26:49 UTC 2020-Mar-15 06:26:49 UTC
``` ```
A confirmation of submission will be sent to the submitter email address before the close of the contest. A confirmation of submission will be sent to the submitting email address
before the close of the contest.
## Rule 9 ## Rule 9
@@ -215,10 +223,10 @@ Entries requiring human interaction to be initially compiled are not permitted.
## Rule 11 ## Rule 11
Programs that require special privileges (setuid, setgid, super-user, Programs that require special privileges (`setuid(2)`, `setgid(2)`, super-user,
special owner, special group, etc.) are still highly discouraged. We special owner, special group, etc.) are still highly discouraged. We
do not guarantee these functions will behave as you expect on our test do not guarantee these functions will behave as you expect on our test
platforms. If your program needs special permissions please document platforms. If your program needs special permissions **please** document
them in the remarks file. them in the remarks file.
@@ -226,8 +234,8 @@ them in the remarks file.
Legal abuse of the rules is somewhat encouraged. An entry that, in Legal abuse of the rules is somewhat encouraged. An entry that, in
the opinion of the judges, violates the rules will be disqualified. the opinion of the judges, violates the rules will be disqualified.
Entries that attempt to abuse the rules must try to justify why Entries that attempt to abuse the rules **MUST** try to justify why
their rule abuse is legal in the remarks file. their rule abuse is legal, in the remarks file.
## Rule 13 ## Rule 13
@@ -239,7 +247,7 @@ the high bit set (octet value >= 128) will be rejected.
## Rule 14 ## Rule 14
Any C source that fails to compile because of lines with trailing Any C source that fails to compile because of lines with trailing
control-M's (i.e., lines with a tailing octet 015) will be rejected. control-M's (i.e., lines with a tailing octet `015`) will be rejected.
Please do not put trailing control-M's on remarks file lines. Please do not put trailing control-M's on remarks file lines.
Please check to be sure, before submitting, that you have removed Please check to be sure, before submitting, that you have removed
@@ -265,10 +273,13 @@ After your email address has been confirmed, the submission code will
be valid for submitting and editing the entry for the lifetime of the be valid for submitting and editing the entry for the lifetime of the
competition. competition.
See also [How may I submit to the IOCCC?](../faq.html#submit) in the
[FAQ](../faq.html).
## Rule 16 ## Rule 16
You are STRONGLY encouraged to submit a previously unpublished and You are **STRONGLY** encouraged to submit a previously unpublished and
original entry. Submissions that are similar to previous entries are original entry. Submissions that are similar to previous entries are
discouraged. As we judge anonymously, submissions that have already discouraged. As we judge anonymously, submissions that have already
been published may be disqualified. been published may be disqualified.
@@ -277,8 +288,10 @@ been published may be disqualified.
## Rule 17 ## Rule 17
The total size of your submission: the sum of the size of the program, The total size of your submission: the sum of the size of the program,
hints, comments, build and info files MUST be less than or equal hints, comments, build and info files **MUST** be less than or equal
to 1048576 octets in size. to 1048576 octets in size. The
[mkiocccentry toolkit]((https://github.com/ioccc-src/mkiocccentry) will verify
that your entry is not too big.
## Rule 18 ## Rule 18
@@ -287,8 +300,8 @@ The entirety of your entry must be submitted under the following license:
**`|`** **[CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/)** **`|`** **[CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/)**
You (the authors) must own the contents of your submission OR You (the author(s)) **MUST** own the contents of your submission **OR**
you must have permission from the owners to submit their content you **MUST** have permission from the owner(s) to submit their content.
You must not submit anything that cannot be submitted under that license. You must not submit anything that cannot be submitted under that license.
@@ -296,7 +309,7 @@ You must not submit anything that cannot be submitted under that license.
## Rule 19 ## Rule 19
The remarks file must be written in markdown format. See The remarks file must be written in markdown format. See
the Daring Fireball {Markdown: Basics](http://daringfireball.net/projects/markdown/basics) the Daring Fireball [Markdown: Basics](http://daringfireball.net/projects/markdown/basics)
for more information. for more information.
**`|`** We currently use [pandoc](https://pandoc.org) to convert markdown to HTML. **`|`** We currently use [pandoc](https://pandoc.org) to convert markdown to HTML.
@@ -304,15 +317,17 @@ for more information.
## Rule 20 ## Rule 20
The how to build instructions must be in make form. The how to build instructions must be in Makefile format. See [What kind of
make&#x28;1&#x29; compatibility does the IOCCC support and will it support other
kinds?](../faq.html#make_compatibility) for more details on what we support.
The target of the make file must be called prog. The original The target of the Makefile must be called `prog`. The original
C source file must be called prog.c. C source file must be called `prog.c`.
To invoke the C compiler, use `${CC}`. To invoke the C compiler, use `${CC}`.
To invoke the C preprocessor use `${CPP}`. To invoke the C preprocessor use `${CPP}`.
Do not assume that . (the current directory) is in the `$PATH`. Do not assume that `.` (the current directory) is in the `$PATH`.
Use a shell command syntax that is compatible with bash. Use a shell command syntax that is compatible with bash.
@@ -320,16 +335,23 @@ Assume that commands commonly found in POSIX-like / Linux-like systems
are available in the search path. are available in the search path.
Do not assume any particular given value of `${CFLAGS}` or other Do not assume any particular given value of `${CFLAGS}` or other
commonly used make variables. commonly used make variables. In other words you **MUST** specify the `CFLAGS`
to use.
See also the
[Makefile.example](https://github.com/ioccc-src/mkiocccentry/blob/master/Makefile.example)
for help in constructing your Makefile. The `mkiocccentry`, which can be found
at the [mkiocccentry repo](https://github.com/ioccc-src/mkiocccentry), tries to
detect if required rules exist in your Makefile.
## Rule 21 ## Rule 21
Your entry must not create nor modify files above the current directory Your entry must not create or modify files above the current directory
with the exception of the `/tmp` and the `/var/tmp` directories. Your entry with the exception of the `/tmp` and the `/var/tmp` directories. Your entry
may create subdirectories below the current directory, or in /tmp, **MAY** create subdirectories below the current directory, or in `/tmp`,
or in `/var/tmp` provided that "**.**" is **not** the first octet in any or in `/var/tmp` provided that "**.**" is **NOT** the first octet in any
directory name. directory name or filename you submit.
## Rule 22 ## Rule 22
@@ -338,16 +360,16 @@ Catch 22:
Your source code, data files, remarks and program output must **NOT** Your source code, data files, remarks and program output must **NOT**
identify the authors of your code. The judges **STRONGLY prefer** to identify the authors of your code. The judges **STRONGLY prefer** to
not know who is submitting entries to the IOCCC. NOT know who is submitting entries to the IOCCC.
Even if you are a previous IOCCC winner, catch 22 still applies. Even if you are a previous IOCCC winner, catch 22 still applies.
Identifying the authors of your entry in an obvious way anywhere Identifying the author(s) of your entry in an obvious way anywhere
within in your code, data, remarks or program output (unless you are within your code, data, remarks or program output (unless you are
_Peter Honeyman_ or pretending to be _Peter Honeyman_) will be grounds _Peter Honeyman_ or pretending to be _Peter Honeyman_) will be grounds
for disqualification of your entry. for disqualification of your entry.
Yes, Virginia, **we really mean it**! Yes, Virginia, **we REALLY mean it**!
## Rule 23 ## Rule 23
@@ -372,16 +394,16 @@ Even though 24 is not prime, you should still see rule #23.
# FOR MORE INFORMATION: # FOR MORE INFORMATION:
The judging will be done by Leonid A. Broukhis, Simon Cooper, The judging will be done by Leonid A. Broukhis and
Landon Curt Noll. Landon Curt Noll.
**`|`** Please send questions or comments about the contest, to: **`|`** Please send questions or comments about the contest, to:
``` ```
q.2020@ioccc.org q.2024@ioccc.org
``` ```
**`|`** **IMPORANT**: You must include the words **ioccc 2020 question** **`|`** **IMPORTANT**: You must include the words **ioccc 2024 question**
in the subject of your email message when sending email to the judges. in the subject of your email message when sending email to the judges.
The rules and the guidelines may (and often do) change from year to The rules and the guidelines may (and often do) change from year to
@@ -413,7 +435,7 @@ to be sure they are seeing the most recent tweets.
**`|`** **The IOCCC no longer uses twitter**. **`|`** **The IOCCC no longer uses twitter**.
**`|`** Today the [IOCCC uses Mastodon](../contact.html#mastodon). **`|`** Today the [IOCCC uses Mastodon](../contact.html#try_mastodon).
**`|`** For more information and to see our IOCCC Mastodon posts, see: **`|`** For more information and to see our IOCCC Mastodon posts, see:
@@ -424,7 +446,6 @@ to be sure they are seeing the most recent tweets.
**-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-** **-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-**
Leonid A. Broukhis<br> Leonid A. Broukhis<br>
Simon Cooper<br>
chongo (Landon Curt Noll) `/\cc/\` chongo (Landon Curt Noll) `/\cc/\`