Landon Curt Noll
a9ca93ec47
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<div class="header">
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<img src="../../png/ioccc.png" alt="IOCCC image by Matt Zucker" width=300 height=110>
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<h1>The International Obfuscated C Code Contest</h1>
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<h2>2000/tomx - Most Complete Program</h2>
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<div class="navbar">
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<a class="Left" href="../thadgavin/index.html">← thadgavin</a>
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<a class="Left" href="../index.html">↑ 2000 ↑</a>
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<a class="Left Disabled" href="#">last entry</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/tomx.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<h2 id="author">Author:</h2>
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<ul>
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<li>Name: <a href="../../authors.html#Thomas_P_John">Thomas P John</a><br>
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Location: <a href="../../location.html#NL">NL</a> - <em>Kingdom of the Netherlands</em> (<em>Netherlands</em>)</li>
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<!-- BEFORE: 1st line of markdown file: 2000/tomx/README.md -->
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<h2 id="to-build">To build:</h2>
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<pre><code> make</code></pre>
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<p>There is an alternate version that compiles <a href="mkentry.c">mkentry.c</a>. See
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<a href="#alternate-code">alternate code</a>.</p>
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<h2 id="to-use">To use:</h2>
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<pre><code> ./tomx</code></pre>
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<h2 id="try">Try:</h2>
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<pre><code> ./try.sh</code></pre>
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<h2 id="alternate-code">Alternate code:</h2>
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<p>This alternate code is based on the author’s remarks with a slight fix so that
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it will do what it once did, compile and run <a href="mkentry.c">mkentry.c</a>. You can use
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it in a similar way as <a href="tomx.c">tomx.c</a>, both executing the source file and
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using it as a Makefile and running the code ends up running <code>mkentry</code>.</p>
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<h3 id="alternate-build">Alternate build:</h3>
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<pre><code> make alt</code></pre>
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<h3 id="alternate-try">Alternate try:</h3>
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<pre><code> ./try.alt.sh</code></pre>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<p>Polyglots have come and gone, but this was the first one we’d seen
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where one language <em>used</em> another to perform its tasks. An interesting
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approach. Admittedly, it’s not all that obfuscated - but there’s more
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to it than you might think, since you have to make sure that your
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changes don’t change the shell code or the Makefile.</p>
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<h2 id="authors-remarks">Author’s remarks:</h2>
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<h3 id="summary">Summary</h3>
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<p>This program works as a C source file, a Makefile and also as a shell
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(<code>/bin/sh</code>) script. But unlike some other multi-language programs, this one is
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NOT meant to print <code>Hello, world</code> in all 3 cases (At least in the true sense
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;-)). The C, Makefile and shell code build upon each other to create a C program (?)
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which when executed as a shell script will compile itself through the C compiler
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using a Makefile! - Pretty useful, Eh?</p>
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<p>Probably, this is the first entry ever to fully satisfy Rule #1 (“Your entry
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must be a complete program”) in the strictest sense;-)</p>
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<h3 id="top-5-reasons-imho-why-this-code-is-an-entry-for-ioccc">Top 5 reasons (IMHO) why this code is an entry for IOCCC</h3>
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<ol type="1">
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<li><p>A glance at the source itself will tell you that most of the
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Obfuscation is NOT in the C code per se, but in the comments
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to the C code. (But sadly, I could not find an “International
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Obfuscated C COMMENT contest”. So I HAD to send this entry
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here to the IOCCC itself).</p></li>
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<li><p>Of the 3 languages in the source, the least obfuscated is
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C (But again, there was NO obfuscated make/shscript contest)
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(Does this hint for a rule in IOCCC-2001 that the major
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obfuscation should be in C and not elsewhere???. Mmmmm…).</p></li>
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<li><p>Extending Argument #2… Obfuscation done in the C code
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(comments?) creates obfuscated code for the other 2 languages.
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This opens new possibilities to be explored in depth in future
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<code>IOCCC</code>s.</p></li>
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<li><p>LOOKS like a Makefile, WORKS like a shell script and COMPILES
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like a C program.</p></li>
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<li><p>Does something useful (See Notes #1 and #2 below).</p></li>
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</ol>
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<h3 id="notes">Notes</h3>
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<ol type="1">
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<li>The program could have been something other than the simple “Hello, world”
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program that it is. It is possible to do <code>#include "prog2.c"</code> in the place of
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the <code>main()</code>, leaving the complexities of the C file elsewhere and making this
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source still acceptable to <code>make</code> and <code>sh</code>. The following modification to the
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last few lines will compile the IOCCC’s famous <a href="mkentry.c">mkentry.c</a>.</li>
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</ol>
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<pre><code> .PHONY: /* true clean */
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#undef true
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#include "mkentry.c"</code></pre>
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<p>Ain’t that useful?</p>
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<ol start="2" type="1">
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<li><p>By extending this program’s idea, It is possible to do some
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very interesting things like generating C code on execution
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by adding additional code in make/sh (open up a loop????).
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This opens the possibilities of generating & compiling some
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(obfuscated?) C code. (Maybe should try this if this program
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fails at IOCCC 2000)</p></li>
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<li><p>Changing the <code>%:%.c</code> dependency to a <code>$(PROG):$(PROG).c</code> form
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can compile this program with some other <code>make</code>s (I got it to
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work in Windows using nmake and Gnuwin32’s sh ;-) )</p></li>
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<li><p>Interesting things to do: try <code>./tomx.c clean</code>. This will
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do the same as <code>make clean</code> :-)). Also: <code>./tomx.c all</code></p></li>
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<li><p>Be careful about the tabs in the source code. Removing them
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or converting tabs to spaces can be disastrous.</p></li>
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</ol>
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<!--
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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<div id="inventory">
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<h1 id="inventory-for-2000tomx">Inventory for 2000/tomx</h1>
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</div>
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<p><a href="#top">Jump to top</a></p>
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<h2 id="primary-files">Primary files</h2>
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<ul>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/tomx.c">tomx.c</a> - entry source</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/Makefile">Makefile</a> - entry Makefile</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/tomx.alt.c">tomx.alt.c</a> - alternative source</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/tomx.orig.c">tomx.orig.c</a> - original source</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/try.alt.sh">try.alt.sh</a> - how to run alternative code</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/try.sh">try.sh</a> - how to run</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/mkentry.c">mkentry.c</a> - IOCCC mkentry source from 1998</li>
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</ul>
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<h2 id="secondary-files">Secondary files</h2>
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<ul>
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<li><a href="2000_tomx.tar.bz2">2000_tomx.tar.bz2</a> - download entry tarball</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/README.md">README.md</a> - markdown source for this web page</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/.entry.json">.entry.json</a> - description of entry in JSON</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/tomx/.path">.path</a> - directory path from top directory</li>
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<li><a href="index.html">index.html</a> - this web page</li>
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||
</ul>
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<!--
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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For more information, see:
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<div id="copyright"><h2>Copyright and CC BY-SA 4.0 License</h2></div>
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<p>All IOCCC content including this file and web page are:</p>
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<b> Copyright © 1984-2024 by Landon Curt Noll. <a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean">Some Rights Reserved</a>.</b>
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<p>This work is licensed by Landon Curt Noll under:</p>
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target="_blank" rel="license noopener noreferrer" style="display:inline-block;"> CC BY-SA 4.0
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<p>The <b>CC BY-SA 4.0 LEGAL CODE</b> for this license is found under:</p>
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<p>You may wish to review the <b><a href="../../license.html">highlights of some of the key
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<h2>Coda</h2>
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<p><a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F2000%2Ftomx%2Findex.html">Nu HTML check this web page</a></p>
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