Landon Curt Noll
476b0d45f0
This HTML is now obsolete in HTML 5: ```html <a name="faq0"></a>Section 0: Submitting entries to a new IOCCC ``` Instead we need to use the div HTML elements: ```html <div id="faq0">Section 0: Submitting entries to a new IOCCC</div> ``` Changed `bin/gen-authors.sh` VERSION from to "1.5 2024-04-15" to "1.6 2024-04-15". Changed `bin/gen-location.sh` VERSION from to "1.1.3 2024-04-13" to "1.2 2024-04-15". Changed `bin/gen-years.sh` VERSION from to "1.1.1 2024-04-13" to "1.2 2024-04-15". Changed `bin/output-index-author.sh` VERSION from to "1.6.1 2024-04-13" to "1.7 2024-04-15". Changed `bin/output-index-inventory.sh` VERSION from to "1.2.5 2024-04-13" to "1.3 2024-04-15". Changed `bin/output-year-index.sh` VERSION from to "1.2.2 2024-04-14" to "1.3 2024-04-15". Changed `bin/status2html.sh` VERSION from to "1.1.4 2024-04-13" to "1.2 2024-04-15". Run `make www` to perform the above. TODO: Check this fix with the Nu HTML 5 validator. TODO: Look for other HTML 5 warnings and errors.
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>2018/giles - Most unstable</title>
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<meta name="description" content="2018 IOCCC entry giles - Most unstable">
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<meta name="keywords" content="IOCCC, 2018, IOCCC 2018, IOCCC entry, giles, Most unstable">
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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>2018/giles - Most unstable</h2>
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<a class="Left" href="../ferguson/index.html">← ferguson</a>
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<a class="Left" href="../index.html">↑ 2018 ↑</a>
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<a class="Left" href="../hou/index.html">hou →</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/giles/prog.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/giles/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a href="../../index.html">IOCCC Home</a>
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<a href="../../years.html">Winning Entries</a>
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<a href="../../authors.html">People who have won</a>
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<a href="../../bugs.html">Bugs & (mis)features</a>
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<a href="../../faq.html#fix_an_entry">Fixing IOCCC entries</a>
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<a href="../../faq.html#fix_web_site">Fixing the web site</a>
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<a href="../../faq.html#fix_author">Fixing author info</a>
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<a href="../../thanks-for-help.html">Thanks for the help</a>
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<hr>
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<div class="sidenav">
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<a href="../../judges.html">The IOCCC Judges</a>
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<a href="../../contact.html">Contacting the IOCCC</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#Edward_Giles">Edward Giles</a><br>
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Location: <a href="../../location.html#AU">AU</a> - <em>Commonwealth of Australia</em> (<em>Australia</em>)</li>
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</ul>
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<h2 id="to-build">To build:</h2>
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<p>This entry requires SDL2 to be installed. See <a href="../../faq.html#SDL">FAQ 3.8: How do I compile an
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IOCCC entry that requires SDL1 or SDL2?</a> if you don’t have it
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installed and don’t know how to do so.</p>
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<pre><code> make</code></pre>
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<h2 id="to-use">To use:</h2>
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<pre><code> ./prog</code></pre>
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<h2 id="try">Try:</h2>
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<pre><code> ./prog ioccc.txt
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./prog prog.c
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./prog sand.txt
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./prog sand.alt.txt</code></pre>
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<p>NOTE: these invocations will take quite some time to finish.</p>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<p>Can you explain the behavior of the program when <a href="ioccc.txt">ioccc.txt</a> is given
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to it as input?</p>
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<p>How would the description of the state machine look like when translated from
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Polynomish to English?</p>
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<h2 id="authors-remarks">Author’s remarks:</h2>
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<h3 id="remarks">Remarks</h3>
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<p>This entry graphically displays a simulation of sand falling.
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It uses SDL to draw the interface.</p>
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<p>The code makes the following assumptions about the underlying system:</p>
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<ul>
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<li>SDL2 is installed from <a href="https://libsdl.org">https://libsdl.org</a> or your
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package manager.</li>
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<li><code>double</code> is an IEEE 754 floating-point type and <code>sizeof(double)==8</code>.</li>
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<li>The compiler supports the C99 standard.</li>
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</ul>
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<p>In order to simulate the motion of the sand, a cellular automaton is used. The
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state transition table is not stored directly. Instead, the program stores the
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coefficients of a polynomial that map each state to the correct one. These
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coefficients are stored as raw hexadecimal in the <code>V[]</code> array, and they are
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reinterpreted as <code>double</code>s when used. This allows more numeric precision in fewer
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characters (base 16 > base 10), and makes the purpose of the array less clear.</p>
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<p>The code is laid out graphically as a bucket pouring sand, and it is far easier
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to observe this high-level layout than the code’s actual function.</p>
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<p>The preprocessor is used to both obfuscate the code as a whole and abbreviate
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the calls to SDL. Additionally, throughout the code, the variables were named
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so that they are short and easily confused with each other.</p>
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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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https://creativecommons.org/licenses/by-sa/4.0/
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-->
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<div id="inventory">
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<h1 id="inventory-for-2018giles">Inventory for 2018/giles</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/2018/giles/prog.c">prog.c</a> - entry source</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/giles/Makefile">Makefile</a> - entry Makefile</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/giles/prog.orig.c">prog.orig.c</a> - original source</li>
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<li><a href="ioccc.txt">ioccc.txt</a> - sample input</li>
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<li><a href="sand.alt.txt">sand.alt.txt</a> - sample input</li>
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<li><a href="sand.txt">sand.txt</a> - sample input</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="2018_giles.tar.bz2">2018_giles.tar.bz2</a> - download entry tarball</li>
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<li><a href="index.html">index.html</a> - this web page</li>
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<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2018/giles/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/2018/giles/.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/2018/giles/.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/2018/giles/.path">.path</a> - directory path from top directory</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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https://creativecommons.org/licenses/by-sa/4.0/
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-->
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<div class="footer">
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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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<p><b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
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target="_blank" rel="license noopener noreferrer" style="display:inline-block;"> CC BY-SA 4.0
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src="../../png/cc.png"
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alt="cc inside circle symbol">
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src="../../png/sa.png"
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alt="arrow looping back on itself inside circle symbol">
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</a></b></p>
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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> <b><a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en">
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https://creativecommons.org/licenses/by-sa/4.0/legalcode.en</a></b></p>
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<p>You should <b>carefully review</b> all of the terms and conditions of the
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<a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en">actual license</a>
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before using the licensed material.</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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features and terms</a></b> of the <a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en">actual license</a>.</p>
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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%2F2018%2Fgiles%2Findex.html">Nu HTML check this web page</a></p>
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<p><a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a></p>
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