The sections have been modified a fair amount. The Entries menu has been extended to have: Fixing entries, Updating author info, Thanks for the help. The first two were moved from FAQ and the last one from About. The rationale for these, in order: entries and authors have to do with entries and most of the help involves entries. It also has to do with website but in 'about' it does not seem the right place, unless maybe it is renamed to 'Credits' or something (I am not suggesting this one way or the other). This one is debatable but that was the rationale. The Status menu has been extended to have: Markdown guidelines and Security policy. The rationale is that the markdown guidelines are part of contest guidelines and the security policy is about the status of the entries and how if there are any security problems they will not be addressed (instead of about the IOCCC). The FAQ was extended to have: Compiling entries, Running entries, How to help. The reason to not have compiling and running entries under Entries is because this is 'how to' and also the menu was too long. How to help seems like a good idea under FAQ too (was in About). About was extended to have the new 'about.html' page (from about.md). This is a rare case where a new file is useful as it fits under 'About'. The menu now is: Home page, About the IOCCC, The Judges, Contact us. I was pondering the 'About [the IOCCC]' at the top and also naming it 'About us' but it seemed like a link to index.html was necessary and as for 'about us' it seemed less clear as to whether it was about the judges or the contest itself. The FAQ has been updated slightly for this. After further inspection the bin/index.html and the inc/index.html links were removed from the about section. With these changes, renaming an item or slight reordering notwithstanding, I believe that #2006 is probably in good shape.
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<div class="header">
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<a href="../../2011/zucker/index.html">
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<img src="../../png/ioccc.png"
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alt="IOCCC image by Matt Zucker"
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width=300
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height=110>
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</a>
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<h1>The International Obfuscated C Code Contest</h1>
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<h2>1993/lmfjyh - Most versatile source</h2>
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<h3>source is the filename that prints value of __FILE__</h3>
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</div>
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<div class="navbar">
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<a class="Left" href="../leo/index.html">← 1993/leo</a>
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<a class="Left" href="../index.html">↑ 1993 ↑</a>
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<a class="Left" href="../plummer/index.html">1993/plummer →</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/lmfjyh.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1993%2Flmfjyh%2Findex.html">✓</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#Jyrki_Holopainen">Jyrki Holopainen</a><br>
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Location: <a href="../../location.html#FI">FI</a> - <em>Republic of Finland </em> (<em>Finland</em>)</li>
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</ul>
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<!-- BEFORE: 1st line of markdown file: 1993/lmfjyh/README.md -->
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<h2 id="to-build">To build:</h2>
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<p>If you have gcc < 2.3.3 you can build this entry like:</p>
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<pre><code> make all</code></pre>
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<p>This will try to create a file whose actual filename is literally:</p>
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<pre><code> ";main(){puts("Hello World!");}char*C=".c</code></pre>
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<p>When that file is compiled, it will greet the world in the
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traditional fashion of C.</p>
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<p>For an explanation of why and how this works see the author’s remarks. The gist
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of the entry itself, however, is the file name <em>itself</em> <strong>is</strong> <em>part of the code</em>.</p>
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<p><strong>NOTE</strong>: We delete the temporary file as part of <code>make all</code> whether
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or not the compilation succeeds. This is a Makefile <strong>feature</strong>
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that might <strong>bug</strong> anyone running the make command. :-)</p>
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<p>This entry will not compile with gcc version >= 2.3.3 as it relied
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on a bug which was later fixed in gcc 2.3.3, and that happened
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<em>a long time ago</em> (.. <em>in a galaxy far, far away</em>?).</p>
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<p>If <code>make all</code> fails to compile, a suggestion of compiling and running
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the alternate version is printed. This alternate version is a variant
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for those of us with gcc >= 2.3.3 or using clang. See <a href="#alternate-code">Alternate
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||
code</a> section below for more details.</p>
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||
<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
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||
<p>The current status of this entry is:</p>
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<blockquote>
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<p><strong>STATUS: INABIAF - please DO NOT fix</strong></p>
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</blockquote>
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<p>For more detailed information see <a href="../../bugs.html#1993_lmfjyh">1993/lmfjyh in bugs.html</a>.</p>
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<h2 id="to-use">To use:</h2>
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||
<p>If you have gcc < 2.3.3 (i.e. the entry can compile):</p>
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<pre><code> ./lmfjyh</code></pre>
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<h2 id="alternate-code">Alternate code:</h2>
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<p>This version does what the code did but in a way that will work with modern
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compilers. We’d like to say there’s something special about it but there isn’t.</p>
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<h3 id="alternate-build">Alternate build:</h3>
|
||
<p>Should you wish to build this version manually:</p>
|
||
<pre><code> make alt</code></pre>
|
||
<h3 id="alternate-use">Alternate use:</h3>
|
||
<p>Use <code>lmfjyh.alt</code> as you would <code>lmfjyh</code> above. Note that other code could also be
|
||
done with the bug that the entry abuses but that would have to be manually
|
||
programmed for this version; see the author’s remarks for more details.</p>
|
||
<h2 id="judges-remarks">Judges’ remarks:</h2>
|
||
<p>There’s more than one way to get around disk quotas. :-)</p>
|
||
<h2 id="authors-remarks">Author’s remarks:</h2>
|
||
<p>“Practical and efficient method of compressing source code”.</p>
|
||
<h3 id="introduction">Introduction</h3>
|
||
<p>I will shortly present a totally new compression method.
|
||
It may be used to compress any types of files, but it works
|
||
best with C-source code.</p>
|
||
<p>As an example, I have taken a simple “Hello world!” program
|
||
that should be familiar to all C-programmers.</p>
|
||
<h4 id="listing-1-a-simple-hello-world-program">Listing 1: A simple “Hello World” program</h4>
|
||
<pre><code> main()
|
||
{
|
||
puts("Hello World!");
|
||
}</code></pre>
|
||
<h3 id="packing-method">Packing method</h3>
|
||
<p>Normally a file name is used only to identify the file, but this new
|
||
revolutionary method introduces a totally new concept: <strong>THE FILE NAME <em>IS</em> THE
|
||
PROGRAM</strong>. There is no need to waste valuable disk space to store source code.
|
||
The program is embedded in the file name, only a minor portion of it is inside
|
||
the file.</p>
|
||
<h4 id="listing-2-compressed-hello-world">Listing 2: Compressed “Hello world”</h4>
|
||
<pre><code> char*_=__FILE__;</code></pre>
|
||
<h4 id="listing-3-code-embedded-in-the-file-name">Listing 3: Code embedded in the file name</h4>
|
||
<pre><code> ";main(){puts("Hello World!");}char*C=".c</code></pre>
|
||
<p>The sample program in listing 1 is 36 bytes long. By using the new
|
||
compression method, the example program may be squeezed to sixteen
|
||
bytes. In the example the compression ratio is 2:1. It is evident
|
||
that the longer the program is, the better the compression ratio
|
||
is. The maximum compression ratio in a UNIX environment is 254:16
|
||
which equals approximately to 16:1. By using the method a one
|
||
megabyte of source code file can be compressed to 64 kilobytes.</p>
|
||
<p>One might easily think that the program could be compressed to a
|
||
single byte by writing a one character long preprocessor directive
|
||
in the source file and defining the actual source code in the
|
||
command line, e.g. <code>cc hello.c -DX='main(){puts ...'</code>. With this
|
||
method nothing is gained, since the compiling commands must be
|
||
stored in a file, and that takes even more space than writing the
|
||
code in a source file as presented in listing 1.</p>
|
||
<h3 id="packing-files-in-a-unix-environment">Packing files in a UNIX environment</h3>
|
||
<p>In a UNIX environment it is possible to write almost any program by
|
||
including the code in file names. Since <code>/</code> is used to separate
|
||
path components and cannot therefore exist in a file name, all
|
||
features of the C language cannot be used.</p>
|
||
<p>In C, the <code>/</code> is used as a division operator and it may also be a
|
||
part of a comment start and end identifier. This, however, is not a
|
||
dangerous limitation, since practice has shown that comments are
|
||
almost totally unnecessary. A real programmer can more easily
|
||
understand pure source code, and misleading comments are
|
||
disastrous. The division operation may be replaced with <code>pow(x, -1)</code>
|
||
and multiplication when using real numbers or with <code>div()</code> function
|
||
when using integers.</p>
|
||
<p>Large programs must be separated into small modules. This enforces
|
||
people to write better programs, since monolithic programming style
|
||
cannot be used. Program development will also be faster, no extra
|
||
code needs be recompiled after changes have been made.</p>
|
||
<h3 id="usage-with-currently-available-tools">Usage with currently available tools</h3>
|
||
<p>I have tested how well this new method works with currently
|
||
available programming tools.</p>
|
||
<p>Any ANSI conforming C-compiler that runs under a REAL operating
|
||
system should be able to compile the code (there might be problems
|
||
with some older UNIX variants).</p>
|
||
<h3 id="compilers">Compilers</h3>
|
||
<p>These worked:</p>
|
||
<ul>
|
||
<li>gcc versions 2.0, 2.1, 2.3.2 (ld failed at AIX with gcc 2.1)</li>
|
||
<li>cc (HP-UX)</li>
|
||
<li>cc (VAX)</li>
|
||
</ul>
|
||
<p>These failed miserably:</p>
|
||
<ul>
|
||
<li>cc (SunOS/Solaris) - could not start cpp properly</li>
|
||
<li>cc/xlc (AIX) - could not open source</li>
|
||
</ul>
|
||
<h3 id="other-tools">Other tools</h3>
|
||
<h4 id="debuggers-tested-at-sunos-4.1.2">Debuggers: (tested at SunOS 4.1.2)</h4>
|
||
<ul>
|
||
<li><p><code>dbx</code> - Quit with a very ‘informative’ error message:
|
||
<code>"dbx: fatal error: Is a directory"</code></p></li>
|
||
<li><p><code>gdb</code> - Printed almost the same error message <code>": Is a directory"</code>.
|
||
It was, however, possible to step through the code but
|
||
not list it.</p></li>
|
||
</ul>
|
||
<h4 id="lints">Lints</h4>
|
||
<p>None of the lints tested environments were able to parse the file.</p>
|
||
<h3 id="conclusions">Conclusions</h3>
|
||
<p>The method can be used to compress any type of file and the compression ratios
|
||
are even better when compressing files other than C source. For example plain
|
||
text files may be compressed with INFINITE compression ratio. It is trivial task
|
||
to compress a 100 kilobytes long text file in about 400 files whose lengths are
|
||
zero bytes. The drawback is that the files must be unpacked before they can be
|
||
used, so a large amount of temporary disk space is needed, while C source is
|
||
totally usable in the compressed form.</p>
|
||
<p>Evidently, there is a long way to go before this new programming
|
||
technique may be widely used, since currently there are only few
|
||
tools supporting it. The advantages over the traditional methods
|
||
are, however, so great that there is no doubt that this method will
|
||
be new standard.</p>
|
||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
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|
||
|
||
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|
||
|
||
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||
|
||
<div id="inventory">
|
||
<h1 id="inventory-for-1993lmfjyh">Inventory for 1993/lmfjyh</h1>
|
||
</div>
|
||
<h2 id="primary-files">Primary files</h2>
|
||
<ul>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/lmfjyh.c">lmfjyh.c</a> - entry source code</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/Makefile">Makefile</a> - entry Makefile</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/lmfjyh.alt.c">lmfjyh.alt.c</a> - alternate source code</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/lmfjyh.orig.c">lmfjyh.orig.c</a> - original source code</li>
|
||
</ul>
|
||
<h2 id="secondary-files">Secondary files</h2>
|
||
<ul>
|
||
<li><a href="1993_lmfjyh.tar.bz2">1993_lmfjyh.tar.bz2</a> - download entry tarball</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/README.md">README.md</a> - markdown source for this web page</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1993/lmfjyh/.path">.path</a> - directory path from top level directory</li>
|
||
<li><a href="index.html">index.html</a> - this web page</li>
|
||
</ul>
|
||
<hr style="width:10%;text-align:left;margin-left:0">
|
||
<h4>
|
||
Jump to: <a href="#">top</a>
|
||
</h4>
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</div>
|
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|
||
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||
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|
||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
|
||
<div class="footer">
|
||
|
||
<div id="copyright"><h3>Copyright © 1984-2024 by Landon Curt Noll:
|
||
<a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">Some Rights Reserved</a></h3>
|
||
<p>
|
||
This work is <b>licensed by Landon Curt Noll</b> under
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
|
||
target="_blank"
|
||
rel="license noopener noreferrer"
|
||
style="display:inline-block;">CC BY-SA 4.0</a></b>.
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/cc.png"
|
||
alt="cc inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/by.png"
|
||
alt="person inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/sa.png"
|
||
alt="arrow looping back on itself inside circle symbol"><br>
|
||
You should <b>carefully review</b> the
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">CC BY-SA 4.0 LEGAL CODE</a></b>
|
||
before using the licensed material.<br>
|
||
You may wish to review the
|
||
<b><a href="../../license.html"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">highlights of some of the key features and terms</a></b>
|
||
of <b>CC BY-SA 4.0</b>.<br>
|
||
</p>
|
||
</div>
|
||
|
||
<div id="coda"><h3>Coda</h3>
|
||
<p>
|
||
<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1993%2Flmfjyh%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
|
||
<a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a><br>
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</p>
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