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9d3438fb8835e38a431dc3a169861bc3f152d32c
ioccc/1992/nathan/index.html
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Landon Curt Noll 9d3438fb88 build missing HTML files for entries 
Setup a simple topnav for missing HTML files for entries.

Added `bin/gen-other-html.sh` to build entry HTML files from
markdown other than README.md to index.html HTML files.

Fixed duplicate link text in `2020/ferguson1/gameplay.md`.

Improved `inc/md2html.cfg` to support building the missing HTML
files for entries.

Added `make gen_other_html` to top level Makefile.
Added `make gen_other_html` to `make quick_www` and `make www`.

Fixed inventory links for year level index.html files.
Changed `bin/output-year-index.sh` VERSION from "1.0.1 2024-02-23"
to "1.1 2024-02-27".

Added missing lines in `manifest.numbers`.  Update the affected
`.entry.json` files.

The manifest (in both `manifest.numbers` and the collection of
manifests from of all entry `.entry.json` files) now match.  Errors
from `make verify_entry_files` will now abort both `make quick_www`
and `make www` rules in the top level `Makefile`.

Changed markdown files in manifest to have an _inventory_order_ of
_2000000000_ so that the `index.html` file will usually appear at
the start of the _Secondary files_ set for the "#inventory" section
of an entry's `index.html` file.

Changed compressed tar files (files that end in _.tar.bz2_) in
manifest to have an _inventory_order_ of _100000_ so that these
files will usually appear at the end of the _Primary files_ set for
the "#inventory" section of an entry's `index.html` file.

Added 'Jump to top` link above the _Primary files_ section.
Changed `bin/output-index-inventory.sh` VERSION from "1.1.1 2024-02-23"
to "1.2 2024-02-27".

Updated HTML files to perform the above via `make www`.
2024-02-27 22:36:20 -08:00

297 lines
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
<link rel="stylesheet" href="../../ioccc.css">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
<title>1992/nathan - Worst Abuse of the Rules</title>
<meta name="description" content="1992 IOCCC entry nathan - Worst Abuse of the Rules">
<meta name="keywords" content="IOCCC, 1992, IOCCC 1992, IOCCC entry, nathan, Worst Abuse of the Rules">
</head>
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<body>
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<div class="header">
<img src="../../png/ioccc.png" alt="IOCCC image by Matt Zucker" width=300 height=110>
<h1>The International Obfuscated C Code Contest</h1>
<h2>1992/nathan - Worst Abuse of the Rules</h2>
</div>
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<div class="topnav">
<a class="Left" href="../marangon/index.html">&larr; marangon</a>
<a class="Left" href="../index.html">&uarr; 1992 &uarr;</a>
<a class="Left" href="../vern/index.html">vern &rarr;</a>
<a class="Right" href="#inventory">Inventory</a>
</div>
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<div class="row">
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<div class="leftcolumn">
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<div class="sidenav">
<a href="#content">Jump to contents</a>
</div>
<hr>
<div class="sidenav">
<a href="../../index.html">IOCCC Home</a>
<a href="../../years.html">Winning Entries</a>
<a href="../../authors.html">People who have won</a>
</div>
<hr>
<div class="sidenav">
<a href="../../news.html">IOCCC News</a>
<a href="../../faq.html#submit">How to enter the IOCCC</a>
<a href="../../faq.html">FAQ</a>
</div>
<hr>
<div class="sidenav">
<a href="../../bugs.html">Bugs &amp; (mis)features</a>
<a href="../../faq.html#fix_an_entry">Fixing IOCCC entries</a>
<a href="../../faq.html#fix_web_site">Fixing the web site</a>
<a href="../../faq.html#fix_author">Fixing author info</a>
<a href="../../thanks-for-help.html">Thanks for the help</a>
</div>
<hr>
<div class="sidenav">
<a href="../../judges.html">The IOCCC Judges</a>
<a href="../../contact.html">Contacting the IOCCC</a>
</div>
<hr>
<div class="sidenav">
<a href="#top">Jump to top</a>
</div>
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<div class="rightcolumn">
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<a name="content"></a>
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<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Nathan_Sidwell">Nathan
Sidwell</a><br> Location: <a href="../../location.html#GB">GB</a>
<br><br></li>
</ul>
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<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> all</span></code></pre></div>
<h2 id="to-use">To use:</h2>
<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./nathan</span></span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="co"># enter some text</span></span></code></pre></div>
<h2 id="try">Try:</h2>
<p>To see some other fun uses:</p>
<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.sh</span></span></code></pre></div>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<h3 id="warning">WARNING:</h3>
<p>The judges make no claim as to the strength or security of this
program. It is likely to be nil, or the next best thing to it. Still,
you might consider installing it in <code>/usr/games/nathan</code>.
:-)</p>
<h3 id="note-from-the-judges-about-the-winning-category">Note from the
judges about the winning category::</h3>
<p>The ‘winning’ category is also open to question. One could say that
it is a ‘file obfuscator’. One could also say that it unintentionally
abused the intent of rule #7 (that programs should be freely
re-distributable). We suspect that the author may not have intended to
do this, but that is the way things go sometimes.</p>
<p>BTW, ‘abuse of the rules’ entries do not violate the rules. Entries
that violate the rules are disqualified. Abuse of the rules entries are
ones that tend to ‘stretch’ the limits and take the contest into
unexpected territory.</p>
<h3 id="historical-notes-from-the-judges-about-this-entry">Historical
notes from the judges about this entry:</h3>
<p>The US International Traffic in Arms Regulations controls certain
exportations going out of the United States. The U.S. Munitions List
gives the specific categories of restricted exports. Because this entry
at one time appeared to fall under this restricted category, the judges
originally were not able to distribute winners outside of the US.</p>
<p>Nathan Sidwell stated that he was willing to distribute the winning
source. To read HIS instructions of how to obtain his winning program
one was able to run:</p>
<div class="sourceCode" id="cb4"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> nathan</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./nathan</span></span></code></pre></div>
<p>to learn how to get a copy of the code.</p>
<p>See the 1992/nathan.c file in the <a
href="/archive/historic/archive-1992.tar.bz2">archive/historic/archive-1992.tar.bz2</a>
tarball if you’re interested in this file.</p>
<h3 id="personal-note-from-chongo">Personal note from chongo:</h3>
<p>I think the situation showed just how ridiculous US crypto
regulations really were/are. Certain US federal officials can get away
with shipping arms to certain nations in apparent violation of US laws,
but I personally can’t re-distribute a program contest winner to the
network!</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="program-use">Program use</h3>
<p>This program is a hello world text encryptor/decryptor. It uses an
enigma (I think) style encryption algorithm, where the encryption key
character is modified by a value, determined from the previous
character. Non-printable characters (those with ASCII values &lt;
<code>' '</code> or &gt; <code>0x7e</code>) are passed unaltered, thus
any kind of file may be successfully processed, but if the original is
printable, the processed file will be too. The input is read from
<code>stdin</code>, and the output presented to <code>stdout</code>. The
key, a text string, is presented as a command argument. This is
optional, and if omitted, the file is self-{de,en}crypted. To specify
decryption, a <code>-</code> should be given before the key. (Actually
encryption and decryption proper inverse operations, so you can use
decrypt to scramble and encrypt to descramble, if you’re perverse.)</p>
<h3 id="portability-a-little-knowledge-is-a-dangerous-thing">Portability
(A little knowledge is a dangerous thing)</h3>
<p>It’s written in ANSI C, and doesn’t even assume an ASCII character
set, (it has an array of the characters to convert), so should be
portable across many platforms. It passes
<code>gcc -ansi -pedantic -O -Wall</code> with no warnings (You may get
assignment in conditional warnings on other platforms though). Because
I’ve heard that conditional jumps slow down fast processors, I’ve
eliminated all the <code>if</code>s from the code; indeed, as its only
one statement, it should compile to one instruction and a suitably
designed CISC machine. To speed compilation, there is only one statement
in the loop, so that another scoping level does not need to be
opened.</p>
<p>Being an encryptor/decryptor, you probably want the source code to be
obfuscated, to hide the algorithm.</p>
<h3 id="obfuscation">Obfuscation</h3>
<p>In spite of the fact that it looks like a nice friendly hello world
program, it isn’t (as documented above). (Short lines have been padded,
as you’ll find if you look at an encrypted copy of the source.)</p>
<p>I’ve also named some of the macros from commonly used functions, just
to keep things muddy. Of course, all the variables are misnamed. The
program is kept simply (one for statement), by serious overuse of
<code>,</code> and <code>?:</code>. These are really confusing when used
together, nested or put in argument lists (is that a comma operator, or
argument separator?).</p>
<h2 id="copyright-and-cc-by-sa-4.0-license">Copyright and CC BY-SA 4.0
License:</h2>
<p>This file is Copyright (c) 2023 by Landon Curt Noll. All Rights
Reserved. You are free to share and adapt this file under the terms of
this license:</p>
<pre><code>Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)</code></pre>
<p>For more information, see:
https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-1992nathan"><a name="inventory"></a>Inventory for
1992/nathan</h1>
<p><a href="#top">Jump to top</a></p>
<h2 id="primary-files">Primary files</h2>
<ul>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.c">nathan.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.orig.c">nathan.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/try.sh">try.sh</a>
- how to run</li>
<li><a href="1992_nathan.tar.bz2">1992_nathan.tar.bz2</a> - download
entry source</li>
</ul>
<h2 id="secondary-files">Secondary files</h2>
<ul>
<li><a href="index.html">index.html</a> - entry home page</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/.gitignore">.gitignore</a>
- list of files that should not be committed under git</li>
<li><a href=".path">.path</a> - directory path from top directory</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/README.md">README.md</a>
- markdown source for index.html</li>
</ul>
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<div class="footer">
<hr>
<h2>Coda</h2>
<p><a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1992%2Fnathan%2Findex.html">Nu HTML check this web page</a></p>
<p><a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a></p>
</div>
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</html>
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