Files
Landon Curt Noll a1c86c8a7a add original C links to entry navigation bars
The navigation bar for a winning entry now has a "_Original C_" link
(between the ✅ and the Inventory on the right hand side) so that one
may easily view the original C code that was submitted for IOCCC judging.

Ran `make www timestamp` to perform the above.
2025-08-10 12:46:23 -07:00

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<h1>The International Obfuscated C Code Contest</h1>
<h2>1996/rcm - Best RFC obfuscation</h2>
<h3>Gunzip equivalent</h3>
</div>
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<div class="navbar">
<a class="Left" href="../jonth/index.html">&larr; 1996/jonth</a>
<a class="Left" href="../index.html">&uarr; 1996 &uarr;</a>
<a class="Left" href="../schweikh1/index.html">1996/schweikh1 &rarr;</a>
<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/rcm.c">C code</a>
<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/Makefile">Makefile</a>
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<h2 id="author">Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Ron_McFarland">Ron McFarland</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)</li>
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<h2 id="to-build">To build:</h2>
<pre><code> make all</code></pre>
<h2 id="to-use">To use:</h2>
<pre><code> ./rcm &lt; file.gz</code></pre>
<p>where <code>file.gz</code> is some gzipped file.</p>
<h2 id="try">Try:</h2>
<p>For more information try:</p>
<pre><code> ./try.sh</code></pre>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>For a good no-op try:</p>
<pre><code> gzip -c &lt; rcm.c | ./rcm</code></pre>
<p><strong>NOTE</strong>: this is done in the <a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/try.sh">try.sh</a> script as
well, along with some other commands including a way to do the above command but
with more steps.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>Except for some silly requirements regarding input validation, CRC checking, and
similar unimportant fluff, this program is a fully compliant
<a href="https://www.ietf.org/rfc/rfc1951.txt">RFC1951</a>/<a href="https://www.ietf.org/rfc/rfc1952.txt">RFC1952</a>
<a href="https://www.gnu.org/software/gzip/">GNU Gzip</a> file uncompressor. Feed it a
<code>gzip</code> compressed file on standard input, and it will write the fully
uncompressed original file to standard output.</p>
<h3 id="objustifications-for-this-entry">ObJustifications for this entry:</h3>
<h4 id="the-design-trade-off-argument">The Design Trade-off Argument:</h4>
<p>“The 184 characters worth of defines in the build file have been
carefully offset by 184 redundant and unnecessary ‘<code>{</code>’, ‘<code>}</code>’, and ‘<code>;</code>’
characters in the source file.”</p>
<h4 id="the-design-review-argument">The Design Review Argument:</h4>
<p>“Using only 216 characters out of a maximum of 256, the build file
meets and actually exceeds specification.”</p>
<h4 id="the-program-metrics-argument">The Program Metrics Argument:</h4>
<p>“The program source is less than 3,100 characters in length and uncompresses the
file
<a href="https://ftp.gnu.org/old-gnu/emacs/emacs-19.34b.tar.gz">emacs-19.34b.tar.gz</a> in
about 130 seconds on my HP 9000/735. The now obsolete source file <code>inflate.c</code>
from the GNU gzip source tree is 31,613 characters in length and uncompresses
the emacs distribution file in slightly under 25 seconds. Thus:</p>
<blockquote>
<p>3100 / 130 = 23.85</p>
</blockquote>
<p>vs:</p>
<blockquote>
<p>31613 / 25 = 1264.52</p>
</blockquote>
<p>which represents a better than 530% improvement in the ratio of
source file size to execution time.”</p>
<h4 id="the-whining-programmers-argument">The Whining Programmer’s Argument:</h4>
<p>“The inflate algorithm requires that over 400 characters worth
of constants and tables be defined. Which means the program
itself had to be squeezed down to about 1,100 IOCCC countable
bytes.”</p>
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<div id="inventory">
<h1 id="inventory-for-1996rcm">Inventory for 1996/rcm</h1>
</div>
<h2 id="primary-files">Primary files</h2>
<ul>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/rcm.c">rcm.c</a> - entry source code</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/rcm.orig.c">rcm.orig.c</a> - original source code</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/try.sh">try.sh</a> - script to try entry</li>
</ul>
<h2 id="secondary-files">Secondary files</h2>
<ul>
<li><a href="1996_rcm.tar.bz2">1996_rcm.tar.bz2</a> - download entry tarball</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/README.md">README.md</a> - markdown source for this web page</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
<li><a href="https://github.com/ioccc-src/winner/blob/master/1996/rcm/.path">.path</a> - directory path from top level directory</li>
<li><a href="rfc1951.gz">rfc1951.gz</a> - RFC 1951 gzipped</li>
<li><a href="rfc1952.gz">rfc1952.gz</a> - RFC 1952 gzipped</li>
<li><a href="index.html">index.html</a> - this web page</li>
</ul>
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<div id="coda"><h3>Coda</h3>
<p>
<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F1996%2Frcm%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
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