mirror/ioccc
1
0 Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
c457b16358b0c61dfc0da19e5c6423e8bd1acc5f
ioccc/1992/imc/index.html
T
Landon Curt Noll c457b16358 fix all HTML headers 
Renamed `ioccc.ico` to `favicon.ico`.

Correctly added use of `favicon.ico` to all constructed HTML headers.
Fixed the smart quote in HTML elements problem.

Moved HTML "DO NOT EDIT" comments down below at the bottom of the
HTML phase 1 section.  According to to the Nu Html Checker, a charset
attribute on a meta element found after the first 1024 bytes.

Changed `bin/md2html.sh` VERSION from "1.1.3 2024-03-28"
to "1.2 2024-03-30".

Improved `bin/gen-status.sh` to adjust the "status_update" value
only when the "contest_status" is changed.

Performed a `make www` to perform and test the above under macOS.
2024-03-30 22:21:45 -07:00

360 lines
18 KiB
HTML
Raw Blame History

This file contains invisible Unicode characters
This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- START: two lines up starts content from: inc/top.default.html -->
<!-- END: this line ends content from: inc/top.default.html -->
<!-- START: this line starts content from: inc/head.default.html -->
<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/imc - Best Output</title>
<link rel="icon" type="image/x-icon" href="../../favicon.ico">
<meta name="description" content="1992 IOCCC entry imc - Best Output">
<meta name="keywords" content="IOCCC, 1992, IOCCC 1992, IOCCC entry, imc, Best Output">
</head>
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
<!-- !!! DO NOT MODIFY THIS FILE - This file is generated by a tool !!! -->
<!-- !!! DO NOT MODIFY THIS FILE - This file is generated by a tool !!! -->
<!-- !!! DO NOT MODIFY THIS FILE - This file is generated by a tool !!! -->
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
<!-- END: this line ends content from: inc/head.default.html -->
<!-- -->
<!-- This web page was formed via the tool: bin/readme2index.sh -->
<!-- The content of main section of this web page came from: 1992/imc/README.md -->
<!-- -->
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
<!-- !!! Do not modify this web page, instead modify the file: 1992/imc/README.md !!! -->
<!-- !!! Do not modify this web page, instead modify the file: 1992/imc/README.md !!! -->
<!-- !!! Do not modify this web page, instead modify the file: 1992/imc/README.md !!! -->
<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
<!-- Markdown content was converted into HTML via the tool: bin/md2html.sh -->
<!-- START: this line starts content from: inc/body.default.html -->
<body>
<!-- END: this line ends content from: inc/body.default.html -->
<!-- START: this line starts content from: inc/header.default.html -->
<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/imc - Best Output</h2>
</div>
<!-- END: this line ends content from: inc/header.default.html -->
<!-- START: this line starts content from: inc/topnav.mid.html -->
<div class="topnav">
<a class="Left" href="../gson/index.html">&larr; gson</a>
<a class="Left" href="../index.html">&uarr; 1992 &uarr;</a>
<a class="Left" href="../kivinen/index.html">kivinen &rarr;</a>
<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1992/imc/imc.c">C code</a>
<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/1992/imc/Makefile">Makefile</a>
<a class="Right" href="#inventory">Inventory</a>
</div>
<!-- END: this line ends content from: inc/topnav.mid.html -->
<!-- START: this line starts content from: inc/begin-row.default.html -->
<div class="row">
<!-- END: this line ends content from: inc/begin-row.default.html -->
<!-- START: this line starts content from: inc/begin-leftcolumn.default.html -->
<div class="leftcolumn">
<!-- END: this line ends content from: inc/begin-leftcolumn.default.html -->
<!-- START: this line starts content from: inc/sidenav.default.html -->
<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>
<a href="../../location.html">Location of authors</a>
</div>
<hr>
<div class="sidenav">
<a href="../../news.html">IOCCC News</a>
<a href="../../status.html">Contest status</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>
<!-- END: this line ends content from: inc/sidenav.default.html -->
<!-- START: this line starts content from: inc/end-leftcolumn.default.html -->
</div>
<!-- END: this line ends content from: inc/end-leftcolumn.default.html -->
<!-- START: this line starts content from: inc/begin-rightcolumn.default.html -->
<div class="rightcolumn">
<!-- END: this line ends content from: inc/begin-rightcolumn.default.html -->
<!-- START: this line starts content from: inc/before-content.default.html -->
<a name="content"></a>
<!-- END: this line ends content from: inc/before-content.default.html -->
<!-- START: this line starts content for HTML phase 20 by: bin/output-index-author.sh via bin/md2html.sh -->
<!-- START: this line starts content generated by: bin/output-index-author.sh -->
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Ian_Collier">Ian Collier</a><br>
Location: <a href="../../location.html#GB">GB</a> - <em>United Kingdom of Great Britain and Northern Ireland</em> (<em>United Kingdom</em>)
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
<!-- END: this line ends content for HTML phase 20 by: bin/output-index-author.sh via bin/md2html.sh -->
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<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="co"># text mode</span></span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./imc</span> <span class="at">-text</span></span>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-4"><a href="#cb2-4" aria-hidden="true" tabindex="-1"></a><span class="ex">./imc</span></span></code></pre></div>
<h2 id="try">Try:</h2>
<p>To see a number of options and configurations:</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>
<p>The program is more interesting to run on workstations that can make use of a
Sun raster file. Others can make use of the -text flag for character oriented
output.</p>
<p>Of course, the source (layout) is self-documenting! :-)</p>
<p>NOTE: The original winning source assumed that <code>exit(3)</code> returned a value which
cause problems for some systems where <code>exit(3)</code> returns a void. The file
<a href="imc.c">imc.c</a> has been modified to avoid this problem. The original file also
declared argc to be a <code>long</code> which was fixed.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="portability">Portability</h3>
<p>This program depends upon the ASCII character set, and makes certain assumptions
about the architecture. It naughtily declares the first argument to <code>main()</code> as
a <code>long</code>, and passes a pointer to <code>long</code> instead of <code>char</code> to <code>fwrite(3)</code>,
giving a length value of 32 bytes for an array of 8 <code>long</code>s. I guess that makes
this program OK on most flavours of unix, but not on PCs.</p>
<h3 id="about-the-program">About the program</h3>
<p>This program has several parameters; each of them has a default, so the
program runs happily without any parameters. If you supply an incorrect
parameter, an obfuscated error message results! :-) Should you want to
run the program without knowing what it does, then supplying the single
letter <code>t</code> as a parameter is a good move. Otherwise, direct the output
into a file. The resulting file is most useful on SunOS, where the
<code>file(1)</code> command will tell you what to do with it. For best results with
the <code>t</code> option, you may want to change the definition of the <code>I</code> macro :-)
Details appear later, though the formatting of the code is a large clue.</p>
<p>All the code in this program appears between the <code>;</code> and <code>)</code> in
<code>for(;;)</code>. That isn’t because I want to win the best one-liner, but
merely because it makes the code so much more impenetrable :-) In fact
running a pretty printer on the code hardly improves it at all. This
program has the obligatory macros with unmatched parentheses, and the
cleverly arranged macro names and parameters to spell out <code>"Ian Colliers Obfuscated C Code"</code>. If you expand macros, bear in mind that the more
complex ones are best left as macros, because they have well-defined and
nontrivial (IMHO) functions. These macros help to give the program’s
parameter format its flexibility. The parameters are sorted out in a
unique way (based on an idea by Pete Bevin) which hides very effectively
their identities (and I think that using a variable called <code>_</code> adds a nice
touch to the illegibility of the code). In this section of the code, the
data types of the numbers checked against is varied, and just because
you see a <code>,</code> doesn’t mean it has anything to do with commas! So I hope
you will agree that this program is more than a little obfuscated…</p>
<p>This is a Mandelbrot/Julia drawer. Normally it produces a monochrome
Sun-format raster file. The version of <code>xloadimage</code> we have is able to
view such files, and so is Sun’s <code>screenload</code> command. [Note: the header
contains eight 4-byte integers, the byte order in which depends upon the
machine. On Sun workstations they are stored MSB first].</p>
<p>The program may be asked to produce text output instead of a raster
file. Then the characters defined in the <code>I</code> macro will be used to create
up to 16 different shades of grey. Quite a respectable picture can be
gained by printing a <code>130x110</code> output on a <a href="https://en.wikipedia.org/wiki/Dot_matrix_printing">dot matrix 132 column
printer</a> with the linefeed
set to 7 points. Text output also gives a good picture when used in an X window
with small characters having a square aspect ratio.</p>
<p>The options accepted by the program follow. Each option is a single letter; it
may be preceded with a minus sign (or any character in <code>[!-/]</code>) and may be
followed by other letters, so for example:</p>
<ul>
<li>m</li>
<li>-m</li>
<li>mask</li>
<li>*mail</li>
</ul>
<p>all mean the same thing. Most options may be followed by one or two
numbers. These numbers may be separated from each other and from the
option by a space, or may be joined to each other with a comma, or may
be appended to the single-letter option, so</p>
<ul>
<li>-s100,200</li>
<li>size 100,200</li>
<li>-size123 100 200</li>
<li>s100 200</li>
</ul>
<p>all mean the same (note that in <code>-size123</code> all characters following the
initial <code>s</code> are ignored). Numbers need not be specified, as each has a
default value. In all cases except for <code>j</code>, <code>t</code>, and <code>s</code> whenever it
appears before <code>t</code>, specifying an option without numbers has no effect.
(specifying <code>-s -t</code> has the effect of producing text with the default
raster size; not a good idea!).</p>
<h3 id="options">Options</h3>
<p>The options of this program are:</p>
<pre><code>-centre x y (float x,y) Centre the picture at x+iy in the complex
plane (default x=0 y=0)
-factor f (float f) Use f pixels per unit of the plane (default
f=x/4 where x is the width)
-julia x y (float x,y) Draw a julia set. Use x+iy as the constant
to add after squaring (default x=0 y=0)
-limit l (int l) Use l iterations maximum (default l=128)
-mask m (int m) Use m as a mask in deciding the colour of each
pixel (see below) (default m=1)
-size x y (int x,y) Produce an x-by-y output (default for raster
x=768 y=768; default for text x=63 y=23)
-text Produce text instead of raster.</code></pre>
<p>The colour of each point is determined by taking the bitwise AND of the
number of iterations and the mask. For a raster, the point is black
(1-bit) if the result is zero, white otherwise. For text, the result of
the operation determines the greyness of the character produced, with a
blank for zero going up to a star for the maximum value. For a
four-colour picture, for example, use a mask with two bits set (e.g. 3),
and for a 16-colour picture use a mask with four bits set (e.g. 15). For
a picture with coarse detail, use a mask which ends with several zero
bits (e.g. 8).</p>
<p>While the program is creating your picture, it displays dots on the
standard error to indicate its progress (one dot per pixel line).</p>
<h3 id="example-pictures-to-try">Example pictures to try</h3>
<p>Here are a couple of good pictures to draw:</p>
<div class="sourceCode" id="cb5"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./imc</span> <span class="at">-s</span> 512,512 <span class="at">-f</span> 600000 <span class="at">-l</span> 512 <span class="at">-m</span> 16 <span class="at">-c.00805,.74274</span> <span class="op">&gt;</span> screen1.ras</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./imc</span> <span class="at">-s512,512</span> <span class="at">-j-.523,-.535</span> <span class="op">&gt;</span> screen2.ras</span></code></pre></div>
<!--
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/
-->
<!-- END: this line ends content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<!-- START: this line starts content for HTML phase 22 by: bin/output-index-inventory.sh via bin/md2html.sh -->
<!-- START: this line starts content generated by: bin/output-index-inventory.sh -->
<h1 id="inventory-for-1992imc"><a name="inventory"></a>Inventory for 1992/imc</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/imc/imc.c">imc.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/imc/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/imc/imc.orig.c">imc.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/imc/try.sh">try.sh</a> - how to run</li>
<li><a href="1992_imc.tar.bz2">1992_imc.tar.bz2</a> - download entry</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/imc/README.md">README.md</a> - markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/imc/.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/imc/.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>
</ul>
<!-- END: next line ends content generated by: bin/output-index-inventory.sh -->
<!-- END: this line ends content for HTML phase 22 by: bin/output-index-inventory.sh via bin/md2html.sh -->
<!-- START: this line starts content from: inc/after-content.default.html -->
<!-- END: this line ends content from: inc/after-content.default.html -->
<!-- START: this line starts content from: inc/end-rightcolumn.default.html -->
</div>
<!-- END: this line ends content from: inc/end-rightcolumn.default.html -->
<!-- START: this line starts content from: inc/end-row.default.html -->
</div>
<!-- END: this line ends content from: inc/end-row.default.html -->
<!-- START: this line starts content from: inc/footer.default.html -->
<!--
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">
<h2>Copyright and CC BY-SA 4.0 License</h2>
<p>This file and web page is:</p>
<blockquote><b>Copyright &copy; 1984-2024 by Landon Curt Noll. All Rights Reserved.</b></p></blockquote>
<p>You are free to share and adapt this file under the terms of this license:</p>
<blockquote><b>Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)</b></blockquote>
<p>For more information, see:</p>
<blockquote><a
href="https://creativecommons.org/licenses/by-sa/4.0/">https://creativecommons.org/licenses/by-sa/4.0/</a></blockquote>
<h2>Coda</h2>
<p><a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1992%2Fimc%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>
<!-- END: this line ends content from: inc/footer.default.html -->
<!-- START: this line starts content from: inc/bottom.default.html -->
</body>
</html>
<!-- END: this line ends content from: inc/bottom.default.html -->
Reference in new issue View Git Blame Copy Permalink