Remove hint.html and index.html
As per discussions on GitHub the index.html and hint.html files should be deleted in favour of README.md files (from any .text/.txt/.markdown/.md files which will be turned into README.md in an upcoming commit).
This commit is contained in:
Cody Boone Ferguson committed
1 parent
ee8a36310f
commit
77fb0f11a2
143 files changed
-28606
No files matched your search
@@ -1,166 +0,0 @@
|
||||
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||||
<html>
|
||||
<head>
|
||||
<meta name="GENERATOR" content="mkd2html 2.1.5a DL=DISCOUNT">
|
||||
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
|
||||
<link rel="stylesheet"
|
||||
type="text/css"
|
||||
href="../hint.css">
|
||||
<title>PiE in the sky award</title>
|
||||
</head>
|
||||
<body>
|
||||
<h1>PiE in the sky award</h1>
|
||||
|
||||
<p>Yusuke Endoh<br>
|
||||
<a href="mailto:mame@ruby-lang.org">mame@ruby-lang.org</a><br>
|
||||
<a href="https://github.com/mame/">https://github.com/mame/</a></p>
|
||||
|
||||
<h2>Judges' comments:</h2>
|
||||
|
||||
<h3>To build:</h3>
|
||||
|
||||
<pre><code>make endoh2
|
||||
</code></pre>
|
||||
|
||||
<h3>To run:</h3>
|
||||
|
||||
<pre><code>./endoh2 > pi.c
|
||||
gcc -o pi pi.c
|
||||
./pi > 314.c
|
||||
...
|
||||
|
||||
./endoh2 e > e.c
|
||||
gcc -o e e.c
|
||||
./e > 271.c
|
||||
...
|
||||
</code></pre>
|
||||
|
||||
<h3>Try:</h3>
|
||||
|
||||
<pre><code>make pi
|
||||
make e
|
||||
make everything
|
||||
</code></pre>
|
||||
|
||||
<h3>Selected Judges Remarks:</h3>
|
||||
|
||||
<p>A pi/e printing quasi-quine in ASCII art with a compressed font in it;
|
||||
what else to wish for in this program? Virtual machine emulation?</p>
|
||||
|
||||
<h2>Author’s comments:</h2>
|
||||
|
||||
<p>Yeah, “Again”. Sorry. But I don’t feel guilty or uncomfortable.</p>
|
||||
|
||||
<p>This entry is based on ‘over-used themes’ such as self reproducing
|
||||
program and pi or e computation. I know you’re tired of them.</p>
|
||||
|
||||
<p>But have you ever seen <strong>all-in-one</strong>?</p>
|
||||
|
||||
<h3>What it is</h3>
|
||||
|
||||
<p>This program generates a new program in the shape of the Greek letter
|
||||
<code>pi</code>. Then, the generated program:</p>
|
||||
|
||||
<ul>
|
||||
<li>computes 3 digits of pi and prints it as a ASCII-art program that:</li>
|
||||
<li>computes 4 digits of pi and prints it as a ASCII-art program that:</li>
|
||||
<li>computes 5 digits of pi and prints it as a ASCII-art program that:</li>
|
||||
<li>computes 6 digits of pi and prints it as a ASCII-art program that:</li>
|
||||
<li>etc.</li>
|
||||
</ul>
|
||||
|
||||
|
||||
<p>One more thing… When you give a command line option “e” to the
|
||||
first program, the generated one will compute Napier’s constant
|
||||
rather than pi.</p>
|
||||
|
||||
<h3>Obfuscation</h3>
|
||||
|
||||
<p>This program itself is in the shape of a spigot. This is derived
|
||||
from analogy with “spigot algorithm” which infinitely computes the
|
||||
value of a mathematical constant such as <code>pi</code> or <code>e</code>.</p>
|
||||
|
||||
<p><a href="http://en.wikipedia.org/wiki/Spigot_algorithm">http://en.wikipedia.org/wiki/Spigot_algorithm</a></p>
|
||||
|
||||
<p>The two sets of programs, 314*.c and 271*.c, are almost the same
|
||||
except its shape and constant computation part. I tailored the
|
||||
common part to parse in both shapes (“3.14…” and “2.71…”), by
|
||||
tweaking the computation order and adding meaningless code fragment.</p>
|
||||
|
||||
<p>On the other hand, to make it fit inside one screen (80 x 25), my
|
||||
program is shortened properly, more than it looks. (As you may
|
||||
know, Quine needs to make its program size doubled.)
|
||||
For example, this program involves 3x5 bitmap font data of ten
|
||||
characters (‘0’ – ‘9’), as just 20 bytes: “G1%xJ{;Q7wunmuGuu%uu”.
|
||||
We can decode character n as <code>275*s[n+10] - 8*s[n] - 8</code>. I solved the
|
||||
system of Bezout’s identities to find the magic string, with the
|
||||
aid of a brute force. See <code>find-font-table.rb</code> in detail.</p>
|
||||
|
||||
<p><a href="http://en.wikipedia.org/wiki/B%C3%A9zout's_identity">http://en.wikipedia.org/wiki/B%C3%A9zout's_identity</a></p>
|
||||
|
||||
<p>I used many other tricks for short coding.</p>
|
||||
|
||||
<p>I’m sorry that many ASCII-art-style winning entries of IOCCCs
|
||||
ignore preprocessor directives. In my program, #include is a part
|
||||
of ASCII-art with comment padded.</p>
|
||||
|
||||
<p>These design requirements made my program well-obfuscated
|
||||
willy-nilly.</p>
|
||||
|
||||
<h3>Portability</h3>
|
||||
|
||||
<p>I expect it to work in any major environment and C compiler.
|
||||
To build with no warning, it requires two C99 features: string
|
||||
literal more than 509 characters and omissible return in main
|
||||
function. In fact, recent compilers with “-std=c99 -Wall -W
|
||||
-Wextra -pedantic” would say nothing.</p>
|
||||
|
||||
<pre><code>gcc -std=c99 -Wall -W -Wextra -pedantic spigot.c
|
||||
clang -std=c99 -Wall -W -Wextra -pedantic spigot.c
|
||||
</code></pre>
|
||||
|
||||
<p>I’ve tested with gcc-4.6.3 and clang-3.0 on Linux (Ubuntu 12.04)
|
||||
and gcc-4.5.3 and clang-3.1 on Cygwin.</p>
|
||||
|
||||
<h3>Synopsis</h3>
|
||||
|
||||
<pre><code>gcc endoh2.c -o endoh2
|
||||
|
||||
./endoh2 > pi.c
|
||||
cat pi.c
|
||||
|
||||
gcc pi.c -o pi ; ./pi > 314.c ; cat 314.c
|
||||
gcc 314.c -o 314 ; ./314 > 3141.c ; cat 3141.c
|
||||
gcc 3141.c -o 3141 ; ./3141 > 31415.c ; cat 31415.c
|
||||
gcc 31415.c -o 31415 ; ./31415 > 314159.c ; cat 314159.c
|
||||
gcc 314159.c -o 314159 ; ./314159 > 3141592.c ; cat 3141592.c
|
||||
etc...
|
||||
|
||||
./endoh2 e > e.c
|
||||
cat e.c
|
||||
|
||||
gcc e.c -o e ; ./e > 271.c ; cat 271.c
|
||||
gcc 271.c -o 271 ; ./271 > 2718.c ; cat 2718.c
|
||||
gcc 2718.c -o 2718 ; ./2718 > 27182.c ; cat 27182.c
|
||||
gcc 27182.c -o 27182 ; ./27182 > 271828.c ; cat 271828.c
|
||||
gcc 271828.c -o 271828 ; ./271828 > 2718281.c ; cat 2718281.c
|
||||
etc...
|
||||
</code></pre>
|
||||
|
||||
<p>You can do <code>make everything</code> for the process (with no <code>cat</code>).</p>
|
||||
|
||||
<p>Note: The executable may return a failure (non-zero) exit status
|
||||
unless -std=c99 option is given.</p>
|
||||
|
||||
<hr />
|
||||
|
||||
<TABLE><TR>
|
||||
<TD><a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-sa/3.0/88x31.png" /></a></TD>
|
||||
<TD><P>© Copyright 1984-2015,
|
||||
<A HREF="/judges.html">Leo Broukhis, Simon Cooper, Landon Curt Noll</A>
|
||||
- All rights reserved<BR>
|
||||
This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-sa/3.0/">Creative Commons Attribution-ShareAlike 3.0 Unported License</a>.</P></TD>
|
||||
<TD> <!--<a href="http://validator.w3.org/check?uri=referer"><img src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01 Transitional" height="31" width="88"></a>--></TD>
|
||||
</TR></TABLE>
|
||||
</body>
|
||||
</html>
|
||||
Reference in new issue
Block a user