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force use of pandoc version >= 3.1.12.2

Browse Source 
The `bin/pandoc-wrapper.sh` tool will verify that the ssytem
has a recent enough version of `pandoc(1)`.

We explain why we insist on `pandoc(1)`. version >= 3.1.12.2
in comments where the $PANDOC_MIN_VERSION is set.

Added `--wrap=preserve` as a default argument to `pandoc(1)`.
While this change will impact every HTML file generated,
we believe this will improve the ability of someone to look
at the generated HTML and correlate with the original markdown.

Changed `bin/pandoc-wrapper.sh` VERSION from "1.4.2 2024-03-17"
to "1.4.3 2024-03-18".

Performed `make www` to achieve all of the above and to generate
HTML using the new  `--wrap=preserve` `pandoc(1)` mode.
This commit is contained in:
Landon Curt Noll committed 2024-03-18 01:26:39 -07:00
1 parent 9eb7a54e9f
commit b0b212acb1
402 files changed
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2014/birken/index.html
+122 -165
View File
@@ -129,12 +129,12 @@
<h2 id="authors"><a name="author"></a>Authors:</h2>
<ul>
<li>Name: <a href="../../authors.html#Alexander_Prishchepov">Alexander
Prishchepov</a><br> Location: <a href="../../location.html#US">US</a> -
<em>United States of America</em> (<em>United States</em>) <br><br></li>
<li>Name: <a href="../../authors.html#Michael_Birken">Michael
Birken</a><br> Location: <a href="../../location.html#US">US</a> -
<em>United States of America</em> (<em>United States</em>) <br><br></li>
<li>Name: <a href="../../authors.html#Alexander_Prishchepov">Alexander Prishchepov</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
<br><br></li>
<li>Name: <a href="../../authors.html#Michael_Birken">Michael Birken</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -144,10 +144,9 @@ Birken</a><br> Location: <a href="../../location.html#US">US</a> -
<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></span></code></pre></div>
<p>There is alternate code that lets you redefine the port to bind to,
in case there is a firewall issue, and also lets you redefine the timing
constant, <code>STARDATE</code>. See <a
href="#alternate%20code">Alternate code</a> below.</p>
<p>There is alternate code that lets you redefine the port to bind to, in case
there is a firewall issue, and also lets you redefine the timing constant,
<code>STARDATE</code>. See <a href="#alternate%20code">Alternate code</a> below.</p>
<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">./prog</span> <span class="op">&lt;</span> some_secret_or_something</span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a></span>
@@ -160,14 +159,12 @@ href="#alternate%20code">Alternate code</a> below.</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">./prog</span> http://127.0.0.1:1701</span></code></pre></div>
<p>What happens if you specify instead of a regular file something like
<code>/dev/null</code> ?</p>
<p>But there’s more! Try opening in a browser the same address and then
see what happens. This is explained by the authors when explaining their
inspiration.</p>
<p>But there’s more! Try opening in a browser the same address and then see what
happens. This is explained by the authors when explaining their inspiration.</p>
<h2 id="alternate-code">Alternate code:</h2>
<p>This version allows you to redefine the port to bind to, should 1701
be a problem for some reason, and it also allows you to change the
timing as described by the author. See <a
href="#configuration">configuration</a> below.</p>
<p>This version allows you to redefine the port to bind to, should 1701 be a
problem for some reason, and it also allows you to change the timing as
described by the author. See <a href="#configuration">configuration</a> below.</p>
<h3 id="alternate-build">Alternate build:</h3>
<p>To specify the port to say, 31337, try:</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> clobber PORT=31337 alt</span></code></pre></div>
@@ -175,131 +172,112 @@ href="#configuration">configuration</a> below.</p>
<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> clobber TIME=5000000 alt</span></code></pre></div>
<p>You can combine them both of course.</p>
<h3 id="alternate-use">Alternate use:</h3>
<p>Use <code>prog.alt</code> as you would <code>prog</code> above.
Remember that ports &lt; 1024 are privileged ports that unprivileged
users cannot use.</p>
<p>Use <code>prog.alt</code> as you would <code>prog</code> above. Remember that ports &lt; 1024 are
privileged ports that unprivileged users cannot use.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>Port 1701? Well this is not the l2f registered TCP/1701 protocol.
Sniff the traffic to/from that port. You will see HTTP client and server
traffic. The HTML content you may see is static and immutable. Nothing
funny with the HTTP status codes. Even the timestamp cookie, once set,
remains static throughout the session. The data appears to not be
transmitted within the binary content communicated between client and
server.</p>
Sniff the traffic to/from that port. You will see HTTP client
and server traffic. The HTML content you may see is static and
immutable. Nothing funny with the HTTP status codes. Even the
timestamp cookie, once set, remains static throughout the
session. The data appears to not be transmitted within the
binary content communicated between client and server.</p>
<p>So how does this program do it? A trek though the cloak of
obfuscation awaits the reader of the source!</p>
<h2 id="authors-remarks">Authors’ remarks:</h2>
<h3 id="abstract">Abstract</h3>
<p>When launched in web server mode, this application appears to deliver
nothing more than a static HTML page. But, in actuality, it allows
covert file transfer over the Internet. This is demonstrated by starting
the application as a client-side downloader. The hidden transmitted data
cannot be reconstructed or even detected from the binary content of the
traffic between the client and the server.</p>
<p>When launched in web server mode, this application appears to deliver nothing
more than a static HTML page. But, in actuality, it allows covert file
transfer over the Internet. This is demonstrated by starting the application as
a client-side downloader. The hidden transmitted data cannot be reconstructed
or even detected from the binary content of the traffic between the client and
the server.</p>
<h2 id="to-use-web-server">To use web server</h2>
<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="op">&lt;</span> secret_file_to_be_downloaded</span></code></pre></div>
<p>Try using the program’s source code as the secret file:</p>
<div class="sourceCode" id="cb9"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="op">&lt;</span> prog.c</span></code></pre></div>
<h2 id="to-use-client-side-downloader">To use client-side
downloader</h2>
<div class="sourceCode" id="cb10"><pre
class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> http://host<span class="pp">[</span><span class="ss">:port</span><span class="pp">]</span></span></code></pre></div>
<p>The optional port defaults to 1701. If the web server instance is
started on the same box, try:</p>
<div class="sourceCode" id="cb11"><pre
class="sourceCode sh"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> http://127.0.0.1:1701</span></code></pre></div>
<p>It will incrementally display the contents of the hidden file at a
rate of approximately 1 baud.</p>
<p>The client-side downloader will automatically terminate if the web
server is bounced.</p>
<h2 id="to-use-client-side-downloader">To use client-side downloader</h2>
<div class="sourceCode" id="cb10"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> http://host<span class="pp">[</span><span class="ss">:port</span><span class="pp">]</span></span></code></pre></div>
<p>The optional port defaults to 1701. If the web server instance is started on
the same box, try:</p>
<div class="sourceCode" id="cb11"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> http://127.0.0.1:1701</span></code></pre></div>
<p>It will incrementally display the contents of the hidden file at a rate of
approximately 1 baud.</p>
<p>The client-side downloader will automatically terminate if the web server is
bounced.</p>
<h3 id="html-content">HTML content</h3>
<p>Plug the URL into a browser to view a static HTML page containing
ASCII artwork.</p>
<p>Plug the URL into a browser to view a static HTML page containing ASCII artwork.</p>
<h3 id="exploration">Exploration</h3>
<p>Studying the network traffic will reveal that the HTML content is
static and immutable, the HTTP request and response fields do not
contain anything remarkable, HTTP status and error codes are not
exploited, no unusual or deprecated features of HTTP are used, and while
the cookie is based on a timestamp, its value also remains unchanged
throughout the session. As mentioned in the abstract, the data is not
transmitted within the binary content communicated between the client
and the server. A full explanation of the protocol appears below, but
feel free to explore before reading further.</p>
<p>Studying the network traffic will reveal that the HTML content is static and
immutable, the HTTP request and response fields do not contain anything
remarkable, HTTP status and error codes are not exploited, no unusual or
deprecated features of HTTP are used, and while the cookie is based on a
timestamp, its value also remains unchanged throughout the session. As
mentioned in the abstract, the data is not transmitted within the binary content
communicated between the client and the server. A full explanation of the
protocol appears below, but feel free to explore before reading further.</p>
<h3 id="inspiration">Inspiration</h3>
<p>The inspiration for this program comes from <a
href="https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country">Star
Trek VI: The Undiscovered Country</a>, specifically the final
confrontation between the <a
href="https://memory-alpha.fandom.com/wiki/USS_Enterprise_(NCC-1701)">Enterprise</a>
and the enhanced prototype <a
href="https://memory-alpha.fandom.com/wiki/Klingon_Bird-of-Prey">Klingon
Bird of Prey</a>. The definitive feature of the prototype was its
ability to fire while cloaked. But, perhaps even more impressive was its
ability to keep an open communication channel with the Enterprise
throughout the battle, enabling the antagonist <a
href="https://memory-alpha.fandom.com/wiki/Chang_(General)">Chang</a> to
taunt <a
href="https://memory-alpha.fandom.com/wiki/James_T._Kirk">Captain
Kirk</a> with <a
href="https://en.wikipedia.org/wiki/William_Shakespeare">Shakespearian</a>
quotes while he slowly pelted his ship with torpedoes. Normally, cloaked
vessels must maintain silent running to avoid detection.</p>
<p>The battle is commemorated in the form of ASCII artwork depicting the
ships faced head-to-head in the page delivered by the web server. Plus,
the program source code is formatted in the shape of a Klingon Bird of
Prey. The code itself includes a number of Star Trek references: the
registry number of the Enterprise (NCC-1701) is defined as a constant;
variable names spell out Cpt. James T. Kirk and <a
href="https://memory-alpha.fandom.com/wiki/Odo">Odo</a> (the <a
href="https://memory-alpha.fandom.com/wiki/Star_Trek:_Deep_Space_Nine">Deep
Space 9</a> character was played by René Auberjonois who also appeared
as <a href="https://memory-alpha.fandom.com/wiki/West">Colonel West</a>
in <a
href="https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country">Star
Trek VI</a>); the <code>STARDATE</code> constant makes timing
configurable; and, the constant <code>k</code> stands for <a
href="https://memory-alpha.fandom.com/wiki/Khan_Noonien_Singh">Khan</a>
(in the final engagement in <a
href="https://memory-alpha.fandom.com/wiki/Star_Trek_II:_The_Wrath_of_Khan">Star
Trek II: The Wrath of Khan</a>, the damaged Enterprise managed to
disable the USS <a
href="https://memory-alpha.fandom.com/wiki/USS_Reliant_(NCC-1864)">Reliant</a>’s
shield generator by accessing its prefix code: 16309).</p>
<p>The inspiration for this program comes from <a href="https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country">Star Trek VI: The Undiscovered
Country</a>,
specifically the final confrontation between the
<a href="https://memory-alpha.fandom.com/wiki/USS_Enterprise_(NCC-1701)">Enterprise</a> and
the enhanced prototype <a href="https://memory-alpha.fandom.com/wiki/Klingon_Bird-of-Prey">Klingon Bird of
Prey</a>. The definitive
feature of the prototype was its ability to fire while cloaked. But, perhaps
even more impressive was its ability to keep an open communication channel with
the Enterprise throughout the battle, enabling the antagonist
<a href="https://memory-alpha.fandom.com/wiki/Chang_(General)">Chang</a> to taunt <a href="https://memory-alpha.fandom.com/wiki/James_T._Kirk">Captain
Kirk</a> with
<a href="https://en.wikipedia.org/wiki/William_Shakespeare">Shakespearian</a> quotes while
he slowly pelted his ship with torpedoes. Normally, cloaked vessels must
maintain silent running to avoid detection.</p>
<p>The battle is commemorated in the form of ASCII artwork depicting the ships
faced head-to-head in the page delivered by the web server. Plus, the program
source code is formatted in the shape of a Klingon Bird of Prey. The code
itself includes a number of Star Trek references: the registry number of the
Enterprise (NCC-1701) is defined as a constant; variable names spell out Cpt.
James T. Kirk and <a href="https://memory-alpha.fandom.com/wiki/Odo">Odo</a> (the <a href="https://memory-alpha.fandom.com/wiki/Star_Trek:_Deep_Space_Nine">Deep
Space 9</a>
character was played by René Auberjonois who also appeared as <a href="https://memory-alpha.fandom.com/wiki/West">Colonel
West</a> in <a href="https://memory-alpha.fandom.com/wiki/Star_Trek_VI:_The_Undiscovered_Country">Star Trek
VI</a>);
the <code>STARDATE</code> constant makes timing configurable; and, the constant <code>k</code> stands
for <a href="https://memory-alpha.fandom.com/wiki/Khan_Noonien_Singh">Khan</a> (in the
final engagement in <a href="https://memory-alpha.fandom.com/wiki/Star_Trek_II:_The_Wrath_of_Khan">Star Trek II: The Wrath of
Khan</a>, the
damaged Enterprise managed to disable the USS
<a href="https://memory-alpha.fandom.com/wiki/USS_Reliant_(NCC-1864)">Reliant</a>’s shield
generator by accessing its prefix code: 16309).</p>
<h3 id="secondary-size-limit">Secondary size limit</h3>
<p>As obligated by a program that employs 23rd century cloaking
technology, when the source is fed as input to <a
href="../iocccsize.c">IOCCC size tool version 2014-09-23-v19</a>, and
the <code>-i</code> command line option is used, the value printed is
0.</p>
<h3 id="transmission-protocol-revealed">Transmission protocol
revealed</h3>
<p>The client-side downloader relies on the response time of the web
server rather than the binary content of the response. The server
transmits 1 nibble at a time by counting to the nibble value via a
sequence of rapid responses terminated by a long response. For instance,
the value 5 would be transmitted by making a series of requests that
result in 5 near instantaneous responses followed by a half-second
delayed response. The long delay is skipped in the case of 15, the
maximal nibble value. With the aid of an ASCII table, it is actually
possible to read the nibbles by repeatedly pressing the refresh button
<p>As obligated by a program that employs 23rd century cloaking technology, when
the source is fed as input to <a href="../iocccsize.c">IOCCC size tool version
2014-09-23-v19</a>, and the <code>-i</code> command line option is used, the
value printed is 0.</p>
<h3 id="transmission-protocol-revealed">Transmission protocol revealed</h3>
<p>The client-side downloader relies on the response time of the web server rather
than the binary content of the response. The server transmits 1 nibble at a
time by counting to the nibble value via a sequence of rapid responses
terminated by a long response. For instance, the value 5 would be transmitted
by making a series of requests that result in 5 near instantaneous responses
followed by a half-second delayed response. The long delay is skipped in the
case of 15, the maximal nibble value. With the aid of an ASCII table, it is
actually possible to read the nibbles by repeatedly pressing the refresh button
within a browser and observing the page refresh delay.</p>
<p>Nibble Count Coding (file transfer protocol NCC-1701) is faster than
transmitting each individual bit as a short or long delay because it
sends each byte with 2 long delays whereas communicating individual bits
requires 8 long delays in the worst case scenario. In fact, Nibble Count
Coding is faster than applying Huffman Coding since that is designed to
produce compact codes under the assumption that the bit value does not
affect transmission time.</p>
<p>The server relies on the cookie to identify each client uniquely,
enabling it to transfer the sequence independently to each client.</p>
transmitting each individual bit as a short or long delay because it sends each
byte with 2 long delays whereas communicating individual bits requires 8 long
delays in the worst case scenario. In fact, Nibble Count Coding is faster than
applying Huffman Coding since that is designed to produce compact codes under
the assumption that the bit value does not affect transmission time.</p>
<p>The server relies on the cookie to identify each client uniquely, enabling it to
transfer the sequence independently to each client.</p>
<h3 id="configuration">Configuration</h3>
<p>As with all network communication, accurate transmission of data
relies on the nature of hardware revealed through statistics and
timeouts set accordingly. The long delay is arbitrarily set to
<code>0.5</code> seconds. This is microsecond tunable via the
<code>STARDATE</code> constant defined at the top of the source code.
Increase the value in the event of transmission errors. Decrease the
value to download faster and less reliably.</p>
<p>As with all network communication, accurate transmission of data relies on the
nature of hardware revealed through statistics and timeouts set accordingly.
The long delay is arbitrarily set to <code>0.5</code> seconds. This is microsecond tunable
via the <code>STARDATE</code> constant defined at the top of the source code. Increase the
value in the event of transmission errors. Decrease the value to download
faster and less reliably.</p>
<p>The NCC constant is the web server port number.</p>
<h3 id="obfuscations">Obfuscations</h3>
<ul>
@@ -310,14 +288,13 @@ referenced via pointers.</li>
<li>Short and meaningless identifiers are used throughout.</li>
<li>Reversed array indexing was applied immoderately.</li>
<li>Minus is used in place of not-equals.</li>
<li><code>O</code> and <code>l</code> were selected for their
resemblance to <code>0</code> and <code>1</code> respectively.</li>
<li>Standard constants and ASCII characters were replaced with their
respective numerical values.</li>
<li><code>O</code> and <code>l</code> were selected for their resemblance to <code>0</code> and <code>1</code> respectively.</li>
<li>Standard constants and ASCII characters were replaced with their respective
numerical values.</li>
</ul>
<h3 id="compiler-warnings">Compiler warnings</h3>
<p>For space considerations, the following include statements were
dropped resulting in compiler warnings:</p>
<p>For space considerations, the following include statements were dropped
resulting in compiler warnings:</p>
<div class="sourceCode" id="cb12"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb12-1"><a href="#cb12-1" aria-hidden="true" tabindex="-1"></a><span class="pp">#include </span><span class="im">&lt;asm/byteorder.h&gt;</span></span>
<span id="cb12-2"><a href="#cb12-2" aria-hidden="true" tabindex="-1"></a><span class="pp">#include </span><span class="im">&lt;ctype.h&gt;</span></span>
<span id="cb12-3"><a href="#cb12-3" aria-hidden="true" tabindex="-1"></a><span class="pp">#include </span><span class="im">&lt;netinet/in.h&gt;</span></span>
@@ -327,55 +304,35 @@ dropped resulting in compiler warnings:</p>
<span id="cb12-7"><a href="#cb12-7" aria-hidden="true" tabindex="-1"></a><span class="pp">#include </span><span class="im">&lt;sys/socket.h&gt;</span></span>
<span id="cb12-8"><a href="#cb12-8" aria-hidden="true" tabindex="-1"></a><span class="pp">#include </span><span class="im">&lt;sys/types.h&gt;</span></span>
<span id="cb12-9"><a href="#cb12-9" aria-hidden="true" tabindex="-1"></a><span class="pp">#include </span><span class="im">&lt;sys/unistd.h&gt;</span></span></code></pre></div>
<p>It may be necessary to restore some of these under certain
environments.</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>
<p>It may be necessary to restore some of these under certain environments.</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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014birken"><a name="inventory"></a>Inventory for
2014/birken</h1>
<h1 id="inventory-for-2014birken"><a name="inventory"></a>Inventory for 2014/birken</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/2014/birken/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/prog.alt.c">prog.alt.c</a>
- alternative source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a href="2014_birken.tar.bz2">2014_birken.tar.bz2</a> - download
entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/prog.alt.c">prog.alt.c</a> - alternative source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="2014_birken.tar.bz2">2014_birken.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/2014/birken/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/.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/2014/birken/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/.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/2014/birken/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/birken/README.md">README.md</a> - markdown source for index.html</li>
</ul>
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2014/deak/index.html
+47 -76
View File
@@ -130,8 +130,8 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Ferenc_Deak">Ferenc Deak</a><br>
Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown
location</em> <br><br></li>
Location: <a href="../../location.html#ZZ">ZZ</a> - <em>Unknown location</em>
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -141,11 +141,10 @@ location</em> <br><br></li>
<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></span></code></pre></div>
<p>There is an alternate version that the author provided but fixed in
2023 to compile with modern systems and to allow one to reconfigure the
constants <code>X1</code>, <code>X2</code>, <code>Y1</code> and
<code>Y2</code> (which were magic numbers). See <a
href="#alternate-code">Alternate code</a> below.</p>
<p>There is an alternate version that the author provided but fixed in 2023 to
compile with modern systems and to allow one to reconfigure the constants <code>X1</code>,
<code>X2</code>, <code>Y1</code> and <code>Y2</code> (which were magic numbers). See <a href="#alternate-code">Alternate
code</a> below.</p>
<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">./prog</span></span></code></pre></div>
<h2 id="try">Try:</h2>
@@ -153,16 +152,14 @@ href="#alternate-code">Alternate code</a> below.</p>
<p>Try changing bounding box coordinates in the source to explore
various regions of the fractal.</p>
<h2 id="alternate-code">Alternate code:</h2>
<p>The alternate code is included as <a href="prog.alt.c">prog.alt.c</a>
so you can more easily see the difference in what it might look like if
the C was more recognisable and also to let you reconfigure the
coordinates.</p>
<p>The alternate code is included as <a href="prog.alt.c">prog.alt.c</a> so you can more
easily see the difference in what it might look like if the C was more
recognisable and also to let you reconfigure the coordinates.</p>
<h3 id="alternate-build">Alternate build:</h3>
<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> alt</span></code></pre></div>
<p>If you wish to redefine the coordinates you can do so by defining
<code>X1</code>, <code>X2</code>, <code>Y1</code> and/or
<code>Y2</code>, which default to: <code>-2</code>, <code>1</code>,
<code>-1.3</code> and <code>1.3</code> respectively. For instance:</p>
<p>If you wish to redefine the coordinates you can do so by defining <code>X1</code>, <code>X2</code>,
<code>Y1</code> and/or <code>Y2</code>, which default to: <code>-2</code>, <code>1</code>, <code>-1.3</code> and <code>1.3</code> respectively.
For instance:</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="fu">make</span> clobber X1=-3 X2=2 Y1=-2.3 Y2=2.3 alt</span></code></pre></div>
<p>You may pick and choose which ones to redefine.</p>
<h3 id="alternate-use">Alternate use:</h3>
@@ -172,26 +169,22 @@ coordinates.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>We consider this entry a tribute to all “Abuse of the C preprocessor”
and Mandelbrot fractal drawing entries we’ve seen over the years.</p>
<p>We liked the use of unary notation facilitated by variadic
macros.</p>
<p>We liked the use of unary notation facilitated by variadic macros.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="portability">Portability</h3>
<p>The application was written on a standard Ubuntu 14.04 and tested
with gcc 4.9.1 and clang 3.5 on a 64 bit system (though this should not
matter). The application makes no assumption regarding any system
specific settings, and it only needs a console to run. The provided
Makefile is just to have an easy compilation. I don’t see any problems
porting it to different compiler/system as long as it supports the C99
standard.</p>
<p>The application was written on a standard Ubuntu 14.04 and tested with
gcc 4.9.1 and clang 3.5 on a 64 bit system (though this should not matter).
The application makes no assumption regarding any system specific settings,
and it only needs a console to run. The provided Makefile is just to have
an easy compilation. I don’t see any problems porting it to different
compiler/system as long as it supports the C99 standard.</p>
<h3 id="the-application">The application</h3>
<p>The purpose of the application is mainly to illustrate the weird
possibilities of the C preprocessor, rather than to be a full featured
console mode Mandelbrot drawer. There are tools much better suited for
drawing fractals.</p>
<p>The usage of recognizable elements from the C programming language in
the application source code is intentionally kept to a bare minimum. If
this phrase would not be true, the application would be the
following:</p>
<p>The purpose of the application is mainly to illustrate the weird possibilities
of the C preprocessor, rather than to be a full featured console mode Mandelbrot
drawer. There are tools much better suited for drawing fractals.</p>
<p>The usage of recognizable elements from the C programming language in the
application source code is intentionally kept to a bare minimum. If this phrase
would not be true, the application would be the following:</p>
<div class="sourceCode" id="cb7"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a><span class="dt">double</span> _<span class="op">[]={-</span><span class="dv">2</span></span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a><span class="op">,</span><span class="dv">1</span><span class="op">,-</span><span class="fl">1.3</span> <span class="op">,</span><span class="fl">1.3</span><span class="op">,</span> <span class="dv">0</span><span class="op">,</span> <span class="dv">0</span><span class="op">,</span><span class="dv">0</span><span class="op">,</span><span class="dv">0</span></span>
<span id="cb7-3"><a href="#cb7-3" aria-hidden="true" tabindex="-1"></a><span class="op">,</span><span class="dv">0</span> <span class="op">,</span><span class="dv">0</span><span class="op">,</span><span class="dv">50</span><span class="op">,</span> <span class="dv">80</span><span class="op">,</span> <span class="dv">0</span><span class="op">,</span><span class="dv">0</span><span class="op">,</span><span class="dv">0</span> <span class="op">,</span><span class="dv">255</span></span>
@@ -211,66 +204,44 @@ following:</p>
<span id="cb7-17"><a href="#cb7-17" aria-hidden="true" tabindex="-1"></a><span class="dv">0</span><span class="op">)</span> <span class="op">;</span>_<span class="op">[</span><span class="dv">12</span><span class="op">]++;</span> _<span class="op">[</span><span class="dv">13</span><span class="op">]</span> <span class="op">=</span><span class="dv">0</span></span>
<span id="cb7-18"><a href="#cb7-18" aria-hidden="true" tabindex="-1"></a><span class="op">;</span><span class="cf">if</span><span class="op">(</span>_ <span class="op">[</span><span class="dv">17</span><span class="op">]</span> <span class="op">!=</span><span class="dv">1</span><span class="op">)</span> putchar</span>
<span id="cb7-19"><a href="#cb7-19" aria-hidden="true" tabindex="-1"></a><span class="op">(</span><span class="bn">0xa</span><span class="op">);</span> main<span class="op">(</span><span class="dv">1</span><span class="op">);}</span></span></code></pre></div>
<p>The application expects no parameters, the only way you can change
the behaviour is to modify the source code at the indicated location:
the line <code>/* &lt;-- Configure here: X1, X2, Y1, Y2 */</code> is
intentionally not obfuscated so that the adventurous programmer can
manually modify the coordinates of the fractal to be drawn on the
screen.</p>
<p>The application expects no parameters, the only way you can change the behaviour
is to modify the source code at the indicated location: the line
<code>/* &lt;-- Configure here: X1, X2, Y1, Y2 */</code> is intentionally not obfuscated so
that the adventurous programmer can manually modify the coordinates of the
fractal to be drawn on the screen.</p>
<h3 id="compiler-warnings">Compiler warnings</h3>
<p>Yes, unfortunately there are compiler warnings of the kind
“initialization makes integer from pointer without a cast” but the
provided Makefile automatically disables them.</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>
<p>Yes, unfortunately there are compiler warnings of the kind “initialization makes
integer from pointer without a cast” but the provided Makefile automatically
disables them.</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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014deak"><a name="inventory"></a>Inventory for
2014/deak</h1>
<h1 id="inventory-for-2014deak"><a name="inventory"></a>Inventory for 2014/deak</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/2014/deak/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/prog.alt.c">prog.alt.c</a>
- alternative source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/try.alt.sh">try.alt.sh</a>
- how to run alternative code</li>
<li><a href="2014_deak.tar.bz2">2014_deak.tar.bz2</a> - download entry
source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/prog.alt.c">prog.alt.c</a> - alternative source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/try.alt.sh">try.alt.sh</a> - how to run alternative code</li>
<li><a href="2014_deak.tar.bz2">2014_deak.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/2014/deak/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/.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/2014/deak/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/.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/2014/deak/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/deak/README.md">README.md</a> - markdown source for index.html</li>
</ul>
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2014/endoh1/index.html
+47 -107
View File
@@ -145,139 +145,79 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<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">./prog</span> <span class="op">&gt;</span> foo.c</span></code></pre></div>
<h2 id="try">Try:</h2>
<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>
<p>The script will ask you if you wish to run <code>make rake</code> but
this is not necessary to fully enjoy the entry. <code>make rake</code>
will run the <a href="rake.sh">rake.sh</a> script and then
<code>prog</code> if all is built okay. If <code>rake</code> is not
installed then it will check that <code>gem</code> is installed. If
<code>gem</code> is not installed it will tell you where to get it and
then tell you how to install <code>rake</code>. Otherwise, if
<code>rake</code> is installed it will try running <code>rake</code> and
if that fails to run it will tell you to run a <code>gem</code> command
as either root or via sudo and then to try running
<code>make rake</code> or <code>./rake.sh</code> again. If
<code>rake</code> succeeds it will run <code>./prog</code> which can be
used to build <code>main.c</code>.</p>
<p>What is the difference between running <code>./prog</code> and
<code>main</code>?</p>
<p>The script will ask you if you wish to run <code>make rake</code> but this is not necessary
to fully enjoy the entry. <code>make rake</code> will run the <a href="rake.sh">rake.sh</a> script and
then <code>prog</code> if all is built okay. If <code>rake</code> is not installed then it will check
that <code>gem</code> is installed. If <code>gem</code> is not installed it will tell you where to get
it and then tell you how to install <code>rake</code>. Otherwise, if <code>rake</code> is installed it
will try running <code>rake</code> and if that fails to run it will tell you to run a
<code>gem</code> command as either root or via sudo and then to try running <code>make rake</code> or
<code>./rake.sh</code> again. If <code>rake</code> succeeds it will run <code>./prog</code> which can be used to
build <code>main.c</code>.</p>
<p>What is the difference between running <code>./prog</code> and <code>main</code>?</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>Big terminals with tiny fonts have their uses in certain cases. One
of them is:</p>
<p>Big terminals with tiny fonts have their uses in certain cases.
One of them is:</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> treacl</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./treacl</span></span></code></pre></div>
<p>which is shorthand for:</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">./prog</span> <span class="op">&lt;</span> prog.c <span class="op">&gt;</span> treacle.c</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span> treacle</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./treacle</span></span></code></pre></div>
<p>When using a smartphone to read the output, you may need to step back
to see the bigger picture because that picture is worth more than 1000
words.</p>
<p>When using a smartphone to read the output, you may need to
step back to see the bigger picture because that picture is worth
more than 1000 words.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="remarks">Remarks</h3>
<p>You may want to use a large display with a very small terminal
font.</p>
<p>You may want to use a large display with a very small terminal font.</p>
<h3 id="spoiler">Spoiler</h3>
<p>See <a href="spoilers.html">spoilers.html</a>.</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>
<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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014endoh1"><a name="inventory"></a>Inventory for
2014/endoh1</h1>
<h1 id="inventory-for-2014endoh1"><a name="inventory"></a>Inventory for 2014/endoh1</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/2014/endoh1/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/Rakefile">Rakefile</a>
- Ruby makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/rake.sh">rake.sh</a>
- make rake script</li>
<li><a href="spoilers.html">spoilers.html</a> - spoilers about Q(uine)R
code generator</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/try.sh">try.sh</a>
- how to run</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/alpha.rb">alpha.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/assemble.rb">assemble.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/ast-def.rb">ast-def.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/gen-prog.rb">gen-prog.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/gen-table.rb">gen-table.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/link.rb">link.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/machine.rb">machine.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/parse.rb">parse.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/prog-tmpl.c">prog-tmpl.c</a>
- source code template used by gen-prog</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/register.rb">register.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/serialize.rb">serialize.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/src.rb">src.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/tool.rb">tool.rb</a>
- support program for Rakefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/vm.c">vm.c</a>
- source code of the VM</li>
<li><a href="2014_endoh1.tar.bz2">2014_endoh1.tar.bz2</a> - download
entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/Rakefile">Rakefile</a> - Ruby makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/rake.sh">rake.sh</a> - make rake script</li>
<li><a href="spoilers.html">spoilers.html</a> - spoilers about Q(uine)R code generator</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/try.sh">try.sh</a> - how to run</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/alpha.rb">alpha.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/assemble.rb">assemble.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/ast-def.rb">ast-def.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/gen-prog.rb">gen-prog.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/gen-table.rb">gen-table.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/link.rb">link.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/machine.rb">machine.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/parse.rb">parse.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/prog-tmpl.c">prog-tmpl.c</a> - source code template used by gen-prog</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/register.rb">register.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/serialize.rb">serialize.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/src.rb">src.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/tool.rb">tool.rb</a> - support program for Rakefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/vm.c">vm.c</a> - source code of the VM</li>
<li><a href="2014_endoh1.tar.bz2">2014_endoh1.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/2014/endoh1/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/.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/2014/endoh1/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/.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/2014/endoh1/README.md">README.md</a>
- markdown source for index.html</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/spoilers.md">spoilers.md</a>
- markdown source for spoilers.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/README.md">README.md</a> - markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh1/spoilers.md">spoilers.md</a> - markdown source for spoilers.html</li>
</ul>
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+42 -65
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@@ -122,38 +122,32 @@
<h1 id="quiner-code-generator">Q(uine)R code generator</h1>
<h2 id="what-is-difficult">What is difficult?</h2>
<p>As you may know, QR code (specification: ISO/IEC 18004) is quite
complex. It requires a bit stream, Reed-Solomon codes, BCH codes, data
relocation, big (and irregular!) numerical tables, human-oriented
pattern arrangement (difficult to implement by a small program),
etc.</p>
<p>On the other hand, a quine has a big restriction: it needs to have
two copies of the program!</p>
<p>Do you think that it is possible to write QR code encoder in C within
<em>1kB</em>?</p>
<p>As you may know, QR code (specification: ISO/IEC 18004) is quite complex. It
requires a bit stream, Reed-Solomon codes, BCH codes, data relocation, big (and
irregular!) numerical tables, human-oriented pattern arrangement (difficult to
implement by a small program), etc.</p>
<p>On the other hand, a quine has a big restriction: it needs to have two copies of
the program!</p>
<p>Do you think that it is possible to write QR code encoder in C within <em>1kB</em>?</p>
<h2 id="how-did-i-achieve-that">How did I achieve that?</h2>
<p>It is known that we can mitigate the quine restriction by
<code>eval</code>. For example, this is a quine written in Ruby:</p>
<div class="sourceCode" id="cb1"><pre
class="sourceCode ruby"><code class="sourceCode ruby"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">eval</span> s<span class="kw">=</span><span class="st">&quot;print &#39;eval s=&#39;; p s&quot;</span></span></code></pre></div>
<p>It is known that we can mitigate the quine restriction by <code>eval</code>.
For example, this is a quine written in Ruby:</p>
<div class="sourceCode" id="cb1"><pre class="sourceCode ruby"><code class="sourceCode ruby"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">eval</span> s<span class="kw">=</span><span class="st">&quot;print &#39;eval s=&#39;; p s&quot;</span></span></code></pre></div>
<p>Note that <code>print</code> appears just once in the program.</p>
<p>To emulate this approach in C, I adopted the following structure.</p>
<pre><code>char s[]=&quot;&lt;main code&gt;int main() { &lt;VM code&gt; }&quot;;
int main() { &lt;VM code&gt;; }</code></pre>
<ul>
<li><code>&lt;VM code&gt;</code> : An own VM implementation (written in
C) that executes the main code.</li>
<li><code>&lt;main code&gt;</code> : An object code of quine and QR code
encoder (written in the assembly language of the VM).</li>
<li><code>&lt;VM code&gt;</code> : An own VM implementation (written in C) that executes the main
code.</li>
<li><code>&lt;main code&gt;</code> : An object code of quine and QR code encoder (written in the
assembly language of the VM).</li>
</ul>
<p><code>&lt;main code&gt;</code> (about 1100 bytes) appears once and
<code>&lt;VM code&gt;</code> (about 450 bytes) appears twice. So the
whole code is about 1100 + 450 * 2 = 2000 bytes. Hooray!</p>
<p><code>&lt;main code&gt;</code> (about 1100 bytes) appears once and <code>&lt;VM code&gt;</code> (about 450 bytes)
appears twice. So the whole code is about 1100 + 450 * 2 = 2000 bytes. Hooray!</p>
<h2 id="what-sort-of-vm-is-that">What sort of VM is that?</h2>
<p>The VM is a kind of stack machine which makes the object code
compact. The instruction set is carefully selected to minimize the sizes
of both <code>&lt;main code&gt;</code> and
<code>&lt;VM code&gt;</code>.</p>
<p>The VM is a kind of stack machine which makes the object code compact. The
instruction set is carefully selected to minimize the sizes of both <code>&lt;main code&gt;</code> and <code>&lt;VM code&gt;</code>.</p>
<ul>
<li>21 integer registers access
<ul>
@@ -178,22 +172,17 @@ of both <code>&lt;main code&gt;</code> and
<li>putchar, exit</li>
</ul></li>
</ul>
<p>The instructions have variable lengths, but many of them are
represented as one printable character. (See <a
href="machine.rb">machine.rb</a> and <a
href="assemble.rb">assemble.rb</a> in detail.) The mapping between
instructions and characters is also carefully designed to minimize
<code>&lt;VM code&gt;</code>, which makes the resulted program
non-human-readable.</p>
<h2 id="how-did-i-create-the-main-code">How did I create the main
code?</h2>
<p>It is too tedious to write the machine language directly. So I wrote
the source code in Ruby syntax and created a Ruby-to-VM compiler that
involves alpha renaming and automatic register allocation only for this
purpose.</p>
<p>The instructions have variable lengths, but many of them are represented as one
printable character. (See <a href="machine.rb">machine.rb</a> and
<a href="assemble.rb">assemble.rb</a> in detail.) The mapping between instructions and
characters is also carefully designed to minimize <code>&lt;VM code&gt;</code>, which makes the
resulted program non-human-readable.</p>
<h2 id="how-did-i-create-the-main-code">How did I create the main code?</h2>
<p>It is too tedious to write the machine language directly. So I wrote the source
code in Ruby syntax and created a Ruby-to-VM compiler that involves alpha
renaming and automatic register allocation only for this purpose.</p>
<ul>
<li><a href="src.rb">src.rb</a>: the source code of QR code encoder
written in Ruby syntax.</li>
<li><a href="src.rb">src.rb</a>: the source code of QR code encoder written in Ruby syntax.</li>
<li><a href="vm.c">vm.c</a>: the source code of the VM.</li>
</ul>
<p>The compiler tool chain is the following.</p>
@@ -230,39 +219,28 @@ raw.txt |
prog.c</code></pre>
<ul>
<li><a href="parse.rb">parse.rb</a> converts Ruby to AST.</li>
<li><a href="serialize.rb">serialize.rb</a> converts AST to intermediate
instruction sequence.</li>
<li><a href="alpha.rb">alpha.rb</a> applies “alpha-renaming” to the
instruction sequence.</li>
<li><a href="register.rb">register.rb</a> applies “register
allocation”.</li>
<li><a href="assemble.rb">assemble.rb</a> converts the sequence to the
final stack-machine instructions.</li>
<li><a href="serialize.rb">serialize.rb</a> converts AST to intermediate instruction sequence.</li>
<li><a href="alpha.rb">alpha.rb</a> applies “alpha-renaming” to the instruction sequence.</li>
<li><a href="register.rb">register.rb</a> applies “register allocation”.</li>
<li><a href="assemble.rb">assemble.rb</a> converts the sequence to the final stack-machine instructions.</li>
<li><a href="interp.c">interp.c</a> is an implementation of the VM.</li>
<li><a href="link.rb">link.rb</a> generates <code>main.c</code> by
linking the instructions and interpreter source.</li>
<li><a href="gen-prog.c">gen-prog.c</a> generates <a
href="prog.c">prog.c</a> based on <code>main.c</code>.</li>
<li><a href="link.rb">link.rb</a> generates <code>main.c</code> by linking the instructions and interpreter source.</li>
<li><a href="gen-prog.c">gen-prog.c</a> generates <a href="prog.c">prog.c</a> based on <code>main.c</code>.</li>
</ul>
<p>You can run the process by <code>rake</code> command.
<code>ruby-minisat</code> gem is needed.</p>
<p>You can run the process by <code>rake</code> command. <code>ruby-minisat</code> gem is needed.</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="ex">$</span> gem install ruby-minisat</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="ex">$</span> rake</span></code></pre></div>
<h2 id="tools">Tools</h2>
<p>I checked that the following QR code readers can read the output of
my program.</p>
<p>I checked that the following QR code readers can read the output of my program.</p>
<ul>
<li>Linux: <a href="http://zbar.sourceforge.net/">ZBar bar code
reader</a>.</li>
<li>Linux: <a href="http://zbar.sourceforge.net/">ZBar bar code reader</a>.</li>
</ul>
<h3 id="a-note-from-the-judges-in-2023">A note from the judges in
2023:</h3>
<p>The author also tested an Android app called Barcode Scanner which
used to be found at
<h3 id="a-note-from-the-judges-in-2023">A note from the judges in 2023:</h3>
<p>The author also tested an Android app called Barcode Scanner which used to be
found at
<code>https://play.google.com/store/apps/details?id=com.google.zxing.client.android</code>
but it appears to no longer exist.</p>
<p>You can use <a href="tool.rb">tool.rb</a> to convert the output to a
png file.</p>
<p>You can use <a href="tool.rb">tool.rb</a> to convert the output to a png file.</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">./main</span> Hello <span class="kw">|</span> <span class="ex">ruby</span> tool.rb <span class="op">&gt;</span> hello.png</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a><span class="ex">$</span> zbarimg <span class="at">-q</span> hello.png</span>
@@ -273,8 +251,7 @@ png file.</p>
<h2 id="limitations">Limitations</h2>
<ul>
<li>QR code error correction level is fixed to L (Low).</li>
<li>It supports only byte mode (not numeric, alphanumeric, kanji
mode…).</li>
<li>It supports only byte mode (not numeric, alphanumeric, kanji mode…).</li>
<li>The mask pattern is fixed to 4.</li>
<li>The mask is not applied to the remained bits.</li>
</ul>
2014/endoh2/index.html
+27 -49
View File
@@ -146,75 +146,53 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<h2 id="try">Try:</h2>
<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>If you look closely at the source, you will see code that appears to
puts C code that includes itself. How and why? Perhaps it is in the DNA
code of the code? Perhaps there are 23 reasons? :-)</p>
<p>If you look closely at the source, you will see code that appears
to puts C code that includes itself. How and why? Perhaps it is
in the DNA code of the code? Perhaps there are 23 reasons? :-)</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="remarks">Remarks</h3>
<p>This chromosome program synthesizes a double helix. The helix can
also be compiled as a C program.</p>
<p>This chromosome program synthesizes a double helix.
The helix can also be compiled as a C program.</p>
<p>Enjoy DNA programming!</p>
<h3 id="for-more-information-background-reading">For more information /
background reading:</h3>
<h3 id="for-more-information-background-reading">For more information / background reading:</h3>
<ul>
<li><p>This program was inspired by Acme::DoubleHelix: <a
href="http://search.cpan.org/~xern/Acme-DoubleHelix-0.01/"
class="uri">http://search.cpan.org/~xern/Acme-DoubleHelix-0.01/</a></p></li>
<li><p>The synthesized helix just includes the original program at the
head. Do you see how <a href="prog.c">prog.c</a> determines whether it
was invoked as a standalone program or included as a header file? Note
that it does not use any gcc extension such as
<code>__INCLUDE_LEVEL__</code>.</p></li>
<li><p>The synthesized helix of course follows the base-pairing rules
for DNA: A is bonding only to T, and C is bonding only to G.</p></li>
<li><p>This program was inspired by Acme::DoubleHelix:
<a href="http://search.cpan.org/~xern/Acme-DoubleHelix-0.01/" class="uri">http://search.cpan.org/~xern/Acme-DoubleHelix-0.01/</a></p></li>
<li><p>The synthesized helix just includes the original program at the head.
Do you see how <a href="prog.c">prog.c</a> determines whether it was invoked as a
standalone program or included as a header file? Note that it does not use any
gcc extension such as <code>__INCLUDE_LEVEL__</code>.</p></li>
<li><p>The synthesized helix of course follows the base-pairing rules for DNA:
A is bonding only to T, and C is bonding only to G.</p></li>
</ul>
<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>
<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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014endoh2"><a name="inventory"></a>Inventory for
2014/endoh2</h1>
<h1 id="inventory-for-2014endoh2"><a name="inventory"></a>Inventory for 2014/endoh2</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/2014/endoh2/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/try.sh">try.sh</a>
- how to run</li>
<li><a href="2014_endoh2.tar.bz2">2014_endoh2.tar.bz2</a> - download
entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/try.sh">try.sh</a> - how to run</li>
<li><a href="2014_endoh2.tar.bz2">2014_endoh2.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/2014/endoh2/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/.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/2014/endoh2/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/.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/2014/endoh2/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/endoh2/README.md">README.md</a> - markdown source for index.html</li>
</ul>
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2014/index.html
+65 -90
View File
@@ -123,87 +123,75 @@
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<h1 id="twenty-third-international-obfuscated-c-code-contest">Twenty
Third International Obfuscated C Code Contest</h1>
<h1 id="twenty-third-international-obfuscated-c-code-contest">Twenty Third International Obfuscated C Code Contest</h1>
<h2 id="standard-ioccc-stuff">Standard IOCCC stuff</h2>
<p>View the <code>index.html</code> web page for the given winning entry
for information on how compile the entry and how to run the winning
program. Look at the winning source and try to figure how it does what
it does! You may then wish to look at the Author’s remarks for even more
details.</p>
<p>The IOCCC has a web site and now has a number of international
mirrors. The primary site can be found at <a
href="https://www.ioccc.org">www.ioccc.org</a>.</p>
<p>Use make to compile entries. It is possible that on non-Unix /
non-Linux systems the Makefile needs to be changed. See the Makefile for
details.</p>
<p>Look at the source and try to figure out what the programs do, and
run them with various inputs. If you want to, look at the hints files
for spoilers - this year we included most of the information included by
the submitter.</p>
<p>Read over the README.md for compile/build issues. Your system may
require certain changes (add or remove a library, add or remove a
<code>#define</code>).</p>
<p>View the <code>index.html</code> web page for the given winning entry for information on how
compile the entry and how to run the winning program. Look at the winning
source and try to figure how it does what it does! You may then wish to look at
the Author’s remarks for even more details.</p>
<p>The IOCCC has a web site and now has a number of international mirrors.
The primary site can be found at <a href="https://www.ioccc.org">www.ioccc.org</a>.</p>
<p>Use make to compile entries. It is possible that on non-Unix / non-Linux
systems the Makefile needs to be changed. See the Makefile for details.</p>
<p>Look at the source and try to figure out what the programs do, and run
them with various inputs. If you want to, look at the hints files for
spoilers - this year we included most of the information included
by the submitter.</p>
<p>Read over the README.md for compile/build issues. Your system may require
certain changes (add or remove a library, add or remove a <code>#define</code>).</p>
<p>Some ANSI C compilers are not quite as good as they should be. If
yours is lacking, you may need to compile using gcc instead of your
local compiler.</p>
<h2 id="remarks-on-some-of-the-entries">Remarks on some of the
entries</h2>
<p>We believe you will again be impressed with this year’s winning
entries.</p>
<h2 id="remarks-on-some-of-the-entries">Remarks on some of the entries</h2>
<p>We believe you will again be impressed with this year’s winning entries.</p>
<p>This year, 2014:</p>
<p>We, the judges, were very surprised by this as many of the multiple
authors submitted very different styles of entries.</p>
<p>This year was the second time the IOCCC size tool was used. Rule 2
required that when program source is fed as input to the current IOCCC
size tool, and the IOCCC size tool <code>-i</code> command line option
is used, the value printed should be less than or equal to 2053.</p>
<p>We were pleased to see that abuse of the rules was extended to abuse
to the IOCCC size tool. <a href="../authors.html#Matt_Zucker">Matt
Zucker</a>, followed by a few users, were able to discover clever use of
certain <code>//</code> comments to perplex the size tool. The abuse was
so bad that the judges released a critical and mandatory patch to the
IOCCC size tool on 2014-09-23.</p>
<p>There were some great entries that did not win. Unfortunately some
entries lost because they:</p>
required that when program source is fed as input to the current IOCCC size
tool, and the IOCCC size tool <code>-i</code> command line option is used, the value
printed should be less than or equal to 2053.</p>
<p>We were pleased to see that abuse of the rules was extended to abuse to the
IOCCC size tool. <a href="../authors.html#Matt_Zucker">Matt Zucker</a>, followed by a few
users, were able to discover clever use of certain <code>//</code> comments to perplex the
size tool. The abuse was so bad that the judges released a critical and
mandatory patch to the IOCCC size tool on 2014-09-23.</p>
<p>There were some great entries that did not win. Unfortunately
some entries lost because they:</p>
<ul>
<li><p>were too large according the IOCCC size tool and didn’t even
attempt to justify their excess by a clever abuse of the rules</p></li>
<li><p>were too large according the IOCCC size tool and didn’t
even attempt to justify their excess by a clever abuse of the rules</p></li>
<li><p>depended on a single obfuscation trick</p></li>
<li><p>didn’t work as documented</p></li>
</ul>
<p>We hope the authors of some of those entries will fix and re-submit
them for the next IOCCC.</p>
<p>There is a risk in submitting an entry that is similar to a well used
theme by previous winning entries. Previous authors set a very high bar.
A new winning entry must not only compete against submissions from the
current year, they must also excel over any similar entries in some
particularly impressive way.</p>
<h2 id="on-the-delay-in-releasing-the-winning-entries">On the delay in
releasing the winning entries</h2>
<p>There is a risk in submitting an entry that is similar to a well
used theme by previous winning entries. Previous authors set a very high
bar. A new winning entry must not only compete against submissions
from the current year, they must also excel over any similar entries
in some particularly impressive way.</p>
<h2 id="on-the-delay-in-releasing-the-winning-entries">On the delay in releasing the winning entries</h2>
<p>We apologize on the delay of sending the authors the tarball for them
to review. There were some unforeseen events, such as unplanned
mandatory business travel, the death of an IOCCC judge’s mother, etc.
that impacted our planned schedule for building the tarball of this
year’s winning entries.</p>
<p>During some of these forced delays, we took the time to better
automate some of the tools needed to package the source for the winning
entries to review and to post the edited entries to the web site. It is
our intent that these changes made during those delays will make
releasing future winning IOCCC entries a faster procedure.</p>
<p>p.s. The final advice given to Landon by his mom: “Have fun.” We
recommend following this advice where possible.</p>
to review. There were some unforeseen events, such as unplanned mandatory
business travel, the death of an IOCCC judge’s mother, etc. that impacted
our planned schedule for building the tarball of this year’s winning entries.</p>
<p>During some of these forced delays, we took the time to better automate
some of the tools needed to package the source for the winning entries to review
and to post the edited entries to the web site. It is our intent that
these changes made during those delays will make releasing future winning IOCCC
entries a faster procedure.</p>
<p>p.s. The final advice given to Landon by his mom: “Have fun.”
We recommend following this advice where possible.</p>
<h2 id="final-comments">Final Comments</h2>
<p>Please feel free to send us comments and suggestions about the
competition, this README or anything else that you would like to see in
future contests.</p>
<p>If you use, distribute or publish these entries in some way, please
drop us a line. We enjoy seeing who, where and how the contest is
used.</p>
<p>If you have problems with any of the entries, AND YOU HAVE A FIX,
please send us the fix (patch file or the entire changed file).</p>
<p>For the latest information on how to contact the IOCCC Judges please
visit</p>
<p>If you use, distribute or publish these entries in some way, please drop
us a line. We enjoy seeing who, where and how the contest is used.</p>
<p>If you have problems with any of the entries, AND YOU HAVE A FIX, please
send us the fix (patch file or the entire changed file).</p>
<p>For the latest information on how to contact the IOCCC Judges please visit</p>
<ul>
<li><a href="../contact.html">contact.html</a></li>
</ul>
@@ -212,41 +200,28 @@ visit</p>
<li><a href="../news/html">news.html</a></li>
</ul>
<h1 id="copyright-and-license">Copyright and License</h1>
<p>Copyright (C) 2014,2024, Landon Curt Noll and Leonid A. Broukhis. All
Rights Reserved. This work is licensed under a <a
href="https://creativecommons.org/licenses/by-sa/4.0/">Creative Commons
CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a> license.
If you do use this work in some form, the <a href="../judges.html">IOCCC
judges</a> would appreciate (but does not require) if you were to <a
href="../contact.html">send us a note about your use</a>.</p>
<p>Copyright (C) 2014,2024, Landon Curt Noll and Leonid A. Broukhis. All Rights Reserved.
This work is licensed under a <a href="https://creativecommons.org/licenses/by-sa/4.0/">Creative Commons CC BY-SA 4.0 DEED Attribution-ShareAlike
4.0 International</a> license.
If you do use this work in some form, the <a href="../judges.html">IOCCC judges</a> would appreciate
(but does not require) if you were to <a href="../contact.html">send us a note about your use</a>.</p>
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<h1
id="winning-entries-of-2014---the-23rd-ioccc"><a name=inventory></a><a name=2014></a>Winning
Entries of 2014 - The 23rd IOCCC</h1>
<p><strong>Download IOCCC</strong> <a
href="2014/ioccc.2014.tar.bz2">2014 entry source</a></p>
<h1 id="winning-entries-of-2014---the-23rd-ioccc"><a name=inventory></a><a name=2014></a>Winning Entries of 2014 - The 23rd IOCCC</h1>
<p><strong>Download IOCCC</strong> <a href="2014/ioccc.2014.tar.bz2">2014 entry source</a></p>
<ul>
<li><a href="birken/index.html">2014/birken</a> - Best use of port
1701</li>
<li><a href="deak/index.html">2014/deak</a> - Most underscored
argument</li>
<li><a href="endoh1/index.html">2014/endoh1</a> - Most square (YODA
award)</li>
<li><a href="endoh2/index.html">2014/endoh2</a> - Best use of
bioinformatics</li>
<li><a href="maffiodo1/index.html">2014/maffiodo1</a> - Homage to a
classic game</li>
<li><a href="maffiodo2/index.html">2014/maffiodo2</a> - Most tweetable
entry</li>
<li><a href="morgan/index.html">2014/morgan</a> - Most likely to
succeed</li>
<li><a href="sinon/index.html">2014/sinon</a> - Best choice of
optimization</li>
<li><a href="birken/index.html">2014/birken</a> - Best use of port 1701</li>
<li><a href="deak/index.html">2014/deak</a> - Most underscored argument</li>
<li><a href="endoh1/index.html">2014/endoh1</a> - Most square (YODA award)</li>
<li><a href="endoh2/index.html">2014/endoh2</a> - Best use of bioinformatics</li>
<li><a href="maffiodo1/index.html">2014/maffiodo1</a> - Homage to a classic game</li>
<li><a href="maffiodo2/index.html">2014/maffiodo2</a> - Most tweetable entry</li>
<li><a href="morgan/index.html">2014/morgan</a> - Most likely to succeed</li>
<li><a href="sinon/index.html">2014/sinon</a> - Best choice of optimization</li>
<li><a href="skeggs/index.html">2014/skeggs</a> - Most dynamic</li>
<li><a href="vik/index.html">2014/vik</a> - Best handling of beeps</li>
<li><a href="wiedijk/index.html">2014/wiedijk</a> - Most functional</li>
2014/maffiodo1/index.html
+115 -169
View File
@@ -129,9 +129,9 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Sandro_Maffiodo">Sandro
Maffiodo</a><br> Location: <a href="../../location.html#IT">IT</a> -
<em>Italian Republic</em> (<em>Italy</em>) <br><br></li>
<li>Name: <a href="../../authors.html#Sandro_Maffiodo">Sandro Maffiodo</a><br>
Location: <a href="../../location.html#IT">IT</a> - <em>Italian Republic</em> (<em>Italy</em>)
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -140,15 +140,13 @@ Maffiodo</a><br> Location: <a href="../../location.html#IT">IT</a> -
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<h2 id="to-build">To build:</h2>
<p>This entry requires SDL to be installed. See <a
href="../../faq.html#SDL">FAQ 3.8</a> if you don’t know how to do this
for your system.</p>
<p>This entry requires SDL to be installed. See <a href="../../faq.html#SDL">FAQ 3.8</a> if you
don’t know how to do this for your system.</p>
<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></span></code></pre></div>
<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
<p>The current status of this entry is:</p>
<pre><code>STATUS: INABIAF - please **DO NOT** fix</code></pre>
<p>For more detailed information see <a
href="../../bugs.html#2014_maffiodo1">2014 maffiodo1 bugs</a>.</p>
<p>For more detailed information see <a href="../../bugs.html#2014_maffiodo1">2014 maffiodo1 bugs</a>.</p>
<h2 id="to-use">To use:</h2>
<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="fu">cat</span> game.level <span class="kw">|</span> <span class="ex">./prog</span> 320 200 800 300 128 144 game.rgba game.wav 10343679</span></code></pre></div>
<p>The parameters to the program are:</p>
@@ -161,88 +159,79 @@ href="../../bugs.html#2014_maffiodo1">2014 maffiodo1 bugs</a>.</p>
<li>Sprites image height.</li>
<li>Filename of the sprites image (raw RGBA image).</li>
<li>Filename of the music (WAVE 8000 Hz 8bit Mono).</li>
<li>Sky color. This number depends on the system where you run the
program. See note on macOS.</li>
<li>Sky color. This number depends on the system where you run the program. See
note on macOS.</li>
</ol>
<h2 id="try">Try:</h2>
<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="ex">./giana.sh</span></span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./mario.sh</span></span></code></pre></div>
<p>If you end up telnetting to the server (feature of <a
href="mario.sh">mario.sh</a>) you can try:</p>
<p>If you end up telnetting to the server (feature of <a href="mario.sh">mario.sh</a>) you can
try:</p>
<pre><code>ls # show files including games
wumpus.bas # play Hunt the Wumpus
advent.gam # you know what this is! :-)
starwars # animated Star Wars &#39;film&#39;</code></pre>
<p>If you wish to change the width and height, defaulting at 640 x 480,
say to 800 x 800, try:</p>
<p>If you wish to change the width and height, defaulting at 640 x 480, say to
800 x 800, try:</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="va">ROWS</span><span class="op">=</span>800 <span class="va">COLS</span><span class="op">=</span>800 <span class="ex">./mario.sh</span></span>
<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb6-3"><a href="#cb6-3" aria-hidden="true" tabindex="-1"></a><span class="va">ROWS</span><span class="op">=</span>800 <span class="va">COLS</span><span class="op">=</span>800 <span class="ex">./giana.sh</span></span></code></pre></div>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>A classic for a particular generation. Like all good programs, being
data driven means you can do fun things in small spaces.</p>
<p>NOTE: the author states to use <code>tabsize=4</code> to see the
magic of the formatting of the code. In <code>vim</code> you can do:</p>
<p>A classic for a particular generation. Like all good programs, being data
driven means you can do fun things in small spaces.</p>
<p>NOTE: the author states to use <code>tabsize=4</code> to see the magic of the formatting of
the code. In <code>vim</code> you can do:</p>
<pre><code>:set tabstop=4</code></pre>
<p>in command mode to see this effect. You don’t need to modify your
<code>.vimrc</code> file! You can also use <code>expand</code> as
described below by the author if your terminal has enough rows and you
don’t want to move about in the code. The vim command should immediately
take effect.</p>
<p>in command mode to see this effect. You don’t need to modify your <code>.vimrc</code> file!
You can also use <code>expand</code> as described below by the author if your terminal has
enough rows and you don’t want to move about in the code. The vim command should
immediately take effect.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="remarks">Remarks</h3>
<p>Use <code>tabsize=4</code> to see the magic.</p>
<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="fu">expand</span> <span class="at">-t</span> 4 prog.c</span></code></pre></div>
<p>The program returns 0 if the player wins or <em>non-zero</em> if the
player loses so you can test it and make something useful (or not), like
this:</p>
<p>The program returns 0 if the player wins or <em>non-zero</em> if the player loses so
you can test it and make something useful (or not), like this:</p>
<div class="sourceCode" id="cb9"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a><span class="fu">cat</span> mario.level <span class="kw">|</span> <span class="ex">./prog</span> 320 200 800 300 128 144 mario.rgba mario8.wav 10343679 <span class="kw">&amp;&amp;</span> <span class="ex">telnet</span> telehack.com 23</span></code></pre></div>
<p>and type in: <code>starwars</code></p>
<p>This is an engine for <a
href="https://en.wikipedia.org/wiki/Platform_game">platform game</a>. It
can be used to create games like the legendary <a
href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario
<p>This is an engine for <a href="https://en.wikipedia.org/wiki/Platform_game">platform
game</a>. It can be used to create
games like the legendary <a href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario
Bros</a>.</p>
<p>With this simple and clear source code you can create all the games
you want, for free!</p>
<p>In my two tests I tried to create one level of <a
href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario
Bros</a> and one of <a
href="http://en.wikipedia.org/wiki/The_Great_Giana_Sisters">The Great
<p>With this simple and clear source code you can create all the games you want,
for free!</p>
<p>In my two tests I tried to create one level of <a href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario
Bros</a> and one of <a href="http://en.wikipedia.org/wiki/The_Great_Giana_Sisters">The Great
Giana Sisters</a>.</p>
<p>Both games are classic <a
href="https://en.wikipedia.org/wiki/Platform_game">platform games</a>
and both share the same fundamental rules:</p>
<p>Both games are classic <a href="https://en.wikipedia.org/wiki/Platform_game">platform
games</a> and both share the same
fundamental rules:</p>
<ul>
<li><p>There is a character.</p></li>
<li><p>There are power-ups that can change the look of the character
and/or give the character more or different powers or
abilities!</p></li>
<li><p>There are walls, floors and ceilings. The character can move and
jump over these type of obstacles but cannot walk through them.</p></li>
<li><p>There are enemies and if the character collides with an enemy,
the character dies or loses its powers.</p></li>
<li><p>There are power-ups that can change the look of the character and/or give the
character more or different powers or abilities!</p></li>
<li><p>There are walls, floors and ceilings. The character can move and jump over
these type of obstacles but cannot walk through them.</p></li>
<li><p>There are enemies and if the character collides with an enemy, the character
dies or loses its powers.</p></li>
</ul>
<h3 id="running-under-macos">Running under macOS</h3>
<p>[NOTE: this seems to no longer be the case as of 2023 and most likely
much earlier. However one can change the look of the game doing this
anyway:]</p>
<p>The color of the sky is wrong on macOS. You need to flip some bytes
from the last parameter of the program:</p>
<p>[NOTE: this seems to no longer be the case as of 2023 and most likely much
earlier. However one can change the look of the game doing this anyway:]</p>
<p>The color of the sky is wrong on macOS. You need to flip some bytes from the
last parameter of the program:</p>
<ul>
<li><p>MARIO LAST PARAMETER: <code>4292124159</code></p></li>
<li><p>GIANA LAST PARAMETER: <code>3243070463</code></p></li>
</ul>
<h3 id="regarding-how-to-compile">Regarding how to compile</h3>
<p>The code requires <code>SDL1</code>.</p>
<p>The build process will generate some warnings (~60 with clang)
about:</p>
<p>The build process will generate some warnings (~60 with clang) about:</p>
<ul>
<li><code>incompatible pointer types</code>: because all pointers are
declared to <code>int</code> or <code>char</code>, to save bytes.</li>
<li><code>type specifier missing, defaults to 'int'</code>: because I
need to save bytes.</li>
<li><code>incompatible pointer types</code>: because all pointers are declared to <code>int</code> or
<code>char</code>, to save bytes.</li>
<li><code>type specifier missing, defaults to 'int'</code>: because I need to save bytes.</li>
<li><code>using the result of an assignment as a condition without parentheses</code>:
because <code>while(c=getchar())</code> is not evil.</li>
</ul>
@@ -257,18 +246,17 @@ because <code>while(c=getchar())</code> is not evil.</li>
<li>Sprites image height.</li>
<li>Filename of the sprites image (raw RGBA image).</li>
<li>Filename of the music (WAVE 8000 Hz 8bit Mono).</li>
<li>Sky color. This number depends on the system where you run the
program. See note on macOS.</li>
<li>Sky color. This number depends on the system where you run the program. See
note on macOS.</li>
</ol>
<h2 id="sprites">Sprites</h2>
<p>The program read a single image that contains all the game sprites.
The image must be a grid of 8xN sprites. The size of a single sprite
must be square. The program calculates the size in this way:</p>
<p>The program read a single image that contains all the game sprites. The image
must be a grid of 8xN sprites. The size of a single sprite must be square. The
program calculates the size in this way:</p>
<pre><code>sprite_size = image_width / 8</code></pre>
<p>Each sprite is identified by its position inside the grid, counting
line by line, from left to right (for example sprite 0 is the top left
sprite in the grid, sprite 8 is the first sprite of the second row of
the grid etc.).</p>
<p>Each sprite is identified by its position inside the grid, counting line by
line, from left to right (for example sprite 0 is the top left sprite in the
grid, sprite 8 is the first sprite of the second row of the grid etc.).</p>
<p>Some positions of the grid have a predefined purpose:</p>
<pre><code>Position | Description
:-----------------|:--------------
@@ -291,32 +279,25 @@ the grid etc.).</p>
24 | Player dead
32 | Player won
40 | Super player won</code></pre>
<p>All the others sprites can be used as you want, depending on the game
you want to create.</p>
<p>All the others sprites can be used as you want, depending on the game you want
to create.</p>
<h2 id="levels">Levels</h2>
<p>The program reads the level description from <code>stdin</code>.</p>
<p>The level description is a sequence of rows where each row describe
an object. You can input as many objects as you want but the maximum
number of objects handled by the program is 333. You can modify this
value by editing the source here:</p>
<p>The level description is a sequence of rows where each row describe an object.
You can input as many objects as you want but the maximum number of objects
handled by the program is 333. You can modify this value by editing the source
here:</p>
<div class="sourceCode" id="cb12"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb12-1"><a href="#cb12-1" aria-hidden="true" tabindex="-1"></a>C<span class="op">[</span><span class="dv">333</span><span class="op">*</span><span class="dv">7</span><span class="op">],</span>d<span class="op">=</span><span class="dv">333</span><span class="op">;</span></span></code></pre></div>
<p>Each row has six columns:</p>
<ol type="1">
<li><code>Screen X</code> : <code>x</code> position of the object in the
level.</li>
<li><code>Screen Y</code> : <code>y</code> position of the object in the
level.</li>
<li><code>Sprite</code> : <code>id</code> of the sprite to be used for
the object.</li>
<li><code>CLASSFLAGS</code> : a bitmask that describe how the object
behaves.</li>
<li><code>CLASSPARAM0</code>: a parameter that depends on
<code>CLASSFLAGS</code>.</li>
<li><code>CLASSPARAM1</code>: a parameter that depends on
<code>CLASSFLAGS</code>.</li>
<li><code>Screen X</code> : <code>x</code> position of the object in the level.</li>
<li><code>Screen Y</code> : <code>y</code> position of the object in the level.</li>
<li><code>Sprite</code> : <code>id</code> of the sprite to be used for the object.</li>
<li><code>CLASSFLAGS</code> : a bitmask that describe how the object behaves.</li>
<li><code>CLASSPARAM0</code>: a parameter that depends on <code>CLASSFLAGS</code>.</li>
<li><code>CLASSPARAM1</code>: a parameter that depends on <code>CLASSFLAGS</code>.</li>
</ol>
<p><code>CLASSFLAGS</code> must be a combination (bitwise OR) of some of
these constants:</p>
<p><code>CLASSFLAGS</code> must be a combination (bitwise OR) of some of these constants:</p>
<ul>
<li><p><code>ENEMY</code> (<code>1</code>)</p>
<pre><code> An enemy. CLASSPARAM0 can be 0 if the enemies don&#39;t move, 1 if the
@@ -352,111 +333,76 @@ these constants:</p>
<pre><code> This object is like a BLOCK but when the player hits the object
from below, the object disappears.</code></pre></li>
</ul>
<p>If <code>CLASSFLAGS</code> is <code>0</code> the object only has an
aesthetic function.</p>
<p>The last row of the level descriptor must have all its columns set
equal to <code>-1</code>.</p>
<p>If <code>CLASSFLAGS</code> is <code>0</code> the object only has an aesthetic function.</p>
<p>The last row of the level descriptor must have all its columns set equal to
<code>-1</code>.</p>
<h3 id="limitations">Limitations</h3>
<p>Some classical features are missing: throwing objects, shooting,
multiple lives, score tracking. You can add those features if you
want!</p>
<p>The program allows only one level. It’s easy to add a menu and
multiple levels but the size of the engine would too big for the
contest.</p>
<p>When the <code>Super character</code> becomes bigger
(<code>ZOOM</code> flag), the character can collide with blocks and get
stuck inside them. This is a KNOWN BUG. When your player become bigger,
stay away from blocks!</p>
<p>Some classical features are missing: throwing objects, shooting, multiple lives,
score tracking. You can add those features if you want!</p>
<p>The program allows only one level. It’s easy to add a menu and multiple levels
but the size of the engine would too big for the contest.</p>
<p>When the <code>Super character</code> becomes bigger (<code>ZOOM</code> flag), the character can
collide with blocks and get stuck inside them. This is a KNOWN BUG. When your
player become bigger, stay away from blocks!</p>
<p>There’s only one audio track (game effects are missing).</p>
<h3 id="credits">Credits</h3>
<p>Some of the sprites used in the examples are identical to those of
the original games; the others were designed by me.</p>
<p>The music used in the examples have been <a
href="https://en.wikipedia.org/wiki/Sample-rate_conversion">resampled</a>,
starting from the original versions for the <a
href="http://en.wikipedia.org/wiki/Amiga">Commodore Amiga</a> and <a
href="http://en.wikipedia.org/wiki/Nintendo_Entertainment_System">Nintendo
<p>Some of the sprites used in the examples are identical to those of the original
games; the others were designed by me.</p>
<p>The music used in the examples have been
<a href="https://en.wikipedia.org/wiki/Sample-rate_conversion">resampled</a>, starting from
the original versions for the <a href="http://en.wikipedia.org/wiki/Amiga">Commodore
Amiga</a> and <a href="http://en.wikipedia.org/wiki/Nintendo_Entertainment_System">Nintendo
NES</a>.</p>
<p><a href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario
Bros</a> is a game created by <a
href="https://en.wikipedia.org/wiki/Nintendo">Nintendo Co., Ltd</a>. My
use of the <a
href="https://en.wikipedia.org/wiki/Sprite_(computer_graphics)">sprites</a>
does not intend to infringe the <a
href="https://en.wikipedia.org/wiki/Intellectual_property">intellectual
property</a> of Nintendo but only demonstrates the operation of the
program. From my point of view this is a tribute to the legendary game
<a href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario
<p><a href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario Bros</a> is a game
created by <a href="https://en.wikipedia.org/wiki/Nintendo">Nintendo Co., Ltd</a>. My use
of the <a href="https://en.wikipedia.org/wiki/Sprite_(computer_graphics)">sprites</a> does
not intend to infringe the <a href="https://en.wikipedia.org/wiki/Intellectual_property">intellectual
property</a> of Nintendo but
only demonstrates the operation of the program. From my point of view this is a
tribute to the legendary game <a href="http://en.wikipedia.org/wiki/Super_Mario_Bros.">Super Mario
Bros</a>!</p>
<p><a href="http://en.wikipedia.org/wiki/The_Great_Giana_Sisters">The
Great Giana Sisters</a> is the game created by <a
href="https://www.ign.com/games/producer/time-warp-productions">Time
Warp Productions</a> and my justification for the sprites for Mario are
the same for this game. Long live <a
href="http://en.wikipedia.org/wiki/The_Great_Giana_Sisters">The Great
Giana Sisters</a> !! :)</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>
<p><a href="http://en.wikipedia.org/wiki/The_Great_Giana_Sisters">The Great Giana
Sisters</a> is the game
created by <a href="https://www.ign.com/games/producer/time-warp-productions">Time Warp
Productions</a> and my
justification for the sprites for Mario are the same for this game. Long live
<a href="http://en.wikipedia.org/wiki/The_Great_Giana_Sisters">The Great Giana
Sisters</a> !! :)</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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014maffiodo1"><a name="inventory"></a>Inventory
for 2014/maffiodo1</h1>
<h1 id="inventory-for-2014maffiodo1"><a name="inventory"></a>Inventory for 2014/maffiodo1</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/2014/maffiodo1/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/giana.sh">giana.sh</a>
- demonstrate with The Great Giana Sisters</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/mario.sh">mario.sh</a>
- demonstrate with Super Mario Brothers</li>
<li><a href="screenshot-giana.png">screenshot-giana.png</a> - gameplay
screenshot</li>
<li><a href="screenshot-mario.png">screenshot-mario.png</a> - gameplay
screenshot</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/giana.level">giana.level</a>
- game level data</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/giana.sh">giana.sh</a> - demonstrate with The Great Giana Sisters</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/mario.sh">mario.sh</a> - demonstrate with Super Mario Brothers</li>
<li><a href="screenshot-giana.png">screenshot-giana.png</a> - gameplay screenshot</li>
<li><a href="screenshot-mario.png">screenshot-mario.png</a> - gameplay screenshot</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/giana.level">giana.level</a> - game level data</li>
<li><a href="giana8.wav">giana8.wav</a> - sound file for game</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/mario.level">mario.level</a>
- game level data</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/mario.level">mario.level</a> - game level data</li>
<li><a href="mario8.wav">mario8.wav</a> - sound file for game</li>
<li><a href="2014_maffiodo1.tar.bz2">2014_maffiodo1.tar.bz2</a> -
download entry source</li>
<li><a href="2014_maffiodo1.tar.bz2">2014_maffiodo1.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/2014/maffiodo1/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/.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/2014/maffiodo1/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/.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/2014/maffiodo1/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo1/README.md">README.md</a> - markdown source for index.html</li>
<li><a href="giana.rgba">giana.rgba</a> - raw RGBA image</li>
<li><a href="mario.rgba">mario.rgba</a> - raw RGBA image</li>
</ul>
2014/maffiodo2/index.html
+46 -76
View File
@@ -129,9 +129,9 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Sandro_Maffiodo">Sandro
Maffiodo</a><br> Location: <a href="../../location.html#IT">IT</a> -
<em>Italian Republic</em> (<em>Italy</em>) <br><br></li>
<li>Name: <a href="../../authors.html#Sandro_Maffiodo">Sandro Maffiodo</a><br>
Location: <a href="../../location.html#IT">IT</a> - <em>Italian Republic</em> (<em>Italy</em>)
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -141,45 +141,40 @@ Maffiodo</a><br> Location: <a href="../../location.html#IT">IT</a> -
<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></span></code></pre></div>
<p>There is a 121 byte version provided by the author. See <a
href="#alternate-code">Alternate code</a> below.</p>
<p>There is a 121 byte version provided by the author. See <a href="#alternate-code">Alternate
code</a> below.</p>
<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
<p>The current status of this entry is:</p>
<pre><code>STATUS: INABIAF - please **DO NOT** fix</code></pre>
<p>For more detailed information see <a
href="../../bugs.html#2014_maffiodo2">2014 maffiodo2 bugs</a>.</p>
<p>For more detailed information see <a href="../../bugs.html#2014_maffiodo2">2014 maffiodo2 bugs</a>.</p>
<h2 id="to-use">To use:</h2>
<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">./prog</span> arg</span></code></pre></div>
<h2 id="try">Try:</h2>
<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="ex">./try.sh</span></span></code></pre></div>
<h2 id="alternate-code">Alternate code:</h2>
<p>This shorter version is provided by the author. It has a fixed ramp
and so not as fun but it’s 121 bytes instead of 140.</p>
<p>This shorter version is provided by the author. It has a fixed ramp and so not
as fun but it’s 121 bytes instead of 140.</p>
<h3 id="alternate-build">Alternate build:</h3>
<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="fu">make</span> alt</span></code></pre></div>
<h3 id="alternate-use">Alternate use:</h3>
<div class="sourceCode" id="cb6"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="fu">cat</span> image.rgb <span class="kw">|</span> <span class="ex">./prog.alt</span></span></code></pre></div>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>On the face of it :-) given what this program does one might wonder
what makes this winning entry special. But when you realize the source
is small enough for posting to social media that has a small size
limit.</p>
<p>Who will be the first to tweet this source? How many re-tweets will
such tweet get? And how many people will really understand the
tweet?</p>
<p>Judges’ 2023 update: Last year we would have referred to a <a
href="https://en.wikipedia.org/wiki/Mastodon_(social_network)#Comparison_to_Twitter">toot</a>,
as in a <a href="https://fosstodon.org/@ioccc">Mastodon</a>
<em>toot</em>. This year we might have mentioned the term <a
href="https://www.itechpost.com/articles/115087/20221116/mastodon-officially-replaced-toot-publish.htm">publish</a>
although we remain fond of the <a
href="https://gizmodo.com/mastodon-toot-retired-twitter-tweet-equivalent-1849786221">historic
Mastodon term, toot</a>.</p>
<p>On the face of it :-) given what this program does one might wonder what makes
this winning entry special. But when you realize the source is small enough for posting
to social media that has a small size limit.</p>
<p>Who will be the first to tweet this source? How many re-tweets will such tweet
get? And how many people will really understand the tweet?</p>
<p>Judges’ 2023 update: Last year we would have referred to a
<a href="https://en.wikipedia.org/wiki/Mastodon_(social_network)#Comparison_to_Twitter">toot</a>,
as in a <a href="https://fosstodon.org/@ioccc">Mastodon</a> <em>toot</em>.
This year we might have mentioned the term
<a href="https://www.itechpost.com/articles/115087/20221116/mastodon-officially-replaced-toot-publish.htm">publish</a>
although we remain fond of the
<a href="https://gizmodo.com/mastodon-toot-retired-twitter-tweet-equivalent-1849786221">historic Mastodon term, toot</a>.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="remarks">Remarks</h3>
<p>This program convert an image to an ASCII ART. The program reads a
raw RGB image from <code>stdin</code> and print the ASCII ART to
<code>stdout</code>.</p>
<p>This program convert an image to an ASCII ART. The program reads a raw RGB image
from <code>stdin</code> and print the ASCII ART to <code>stdout</code>.</p>
<p>The build process will raise some warnings about:</p>
<ul>
<li>declaration specifier missing, defaulting to ‘int’</li>
@@ -187,82 +182,57 @@ raw RGB image from <code>stdin</code> and print the ASCII ART to
</ul>
<p>The program will crash if run without parameters.</p>
<h3 id="screen-size">Screen size</h3>
<p>If you have a terminal geometry than is different from the common
80x25 you can modify the <em>output width</em> by changing the value of
the first variable:</p>
<p>If you have a terminal geometry than is different from the common 80x25 you can
modify the <em>output width</em> by changing the value of the first variable:</p>
<div class="sourceCode" id="cb7"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>d<span class="op">=</span><span class="dv">80</span><span class="op">,</span></span></code></pre></div>
<h3 id="something-to-try">Something to try</h3>
<p>Type this:</p>
<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="fu">cat</span> image.rgb <span class="kw">|</span> <span class="ex">./prog</span> <span class="st">&quot; .:;Y0&quot;</span></span></code></pre></div>
<p>You can use your own image. Convert the image to a raw RGB image.
Using ImageMagick it’s very simple:</p>
<p>You can use your own image. Convert the image to a raw RGB image. Using
ImageMagick it’s very simple:</p>
<div class="sourceCode" id="cb9"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a><span class="ex">convert</span> <span class="at">-geometry</span> 80x source.jpg image.rgb</span></code></pre></div>
<p>This program require one parameter or it will crash. The parameter of
the program is the <em>conversion ramp</em>. You can use different ramps
or create your own (for example using some letters of your name).</p>
<p>This program require one parameter or it will crash. The parameter of the
program is the <em>conversion ramp</em>. You can use different ramps or create your own
(for example using some letters of your name).</p>
<p>These are some ramps you can try:</p>
<div class="sourceCode" id="cb10"><pre
class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot; :1&quot;</span></span>
<div class="sourceCode" id="cb10"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot; :1&quot;</span></span>
<span id="cb10-2"><a href="#cb10-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot; .:;Y0&quot;</span></span>
<span id="cb10-3"><a href="#cb10-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot; .:-=+*#%@&quot;</span></span>
<span id="cb10-4"><a href="#cb10-4" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot; .,:!-iots&amp;8%#@$&quot;</span></span></code></pre></div>
<h3 id="byte-version">121 byte version</h3>
<p>An alternative version of this program is only 121bytes long:</p>
<div class="sourceCode" id="cb11"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a>d<span class="op">=</span><span class="dv">80</span><span class="op">,</span>e<span class="op">,</span>j<span class="op">;</span>g<span class="op">(){</span>j<span class="op">+=</span>getchar<span class="op">();}</span>main<span class="op">(){</span><span class="cf">for</span><span class="op">(;;){</span>j<span class="op">=</span><span class="dv">0</span><span class="op">;</span>g<span class="op">();</span><span class="cf">if</span><span class="op">(</span>j<span class="op">&lt;</span><span class="dv">0</span><span class="op">)</span><span class="cf">break</span><span class="op">;</span>g<span class="op">(</span>g<span class="op">());</span>putchar<span class="op">(</span><span class="st">&quot; .:#@&quot;</span><span class="op">[</span>j<span class="op">/</span><span class="dv">3</span><span class="op">*</span><span class="dv">5</span><span class="op">&gt;&gt;</span><span class="dv">8</span><span class="op">]);</span><span class="cf">if</span><span class="op">(!(++</span>e<span class="op">%</span>d<span class="op">))</span>puts<span class="op">(</span><span class="st">&quot;&quot;</span><span class="op">);}}</span></span></code></pre></div>
<p>This alternative version has a <strong>fixed ramp</strong>. It’s
smaller but it’s not so fun to use…</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>
<p>This alternative version has a <strong>fixed ramp</strong>. It’s smaller but it’s not so fun to use…</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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014maffiodo2"><a name="inventory"></a>Inventory
for 2014/maffiodo2</h1>
<h1 id="inventory-for-2014maffiodo2"><a name="inventory"></a>Inventory for 2014/maffiodo2</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/2014/maffiodo2/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/prog.alt.c">prog.alt.c</a>
- alternative source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/try.sh">try.sh</a>
- how to run</li>
<li><a href="2014_maffiodo2.tar.bz2">2014_maffiodo2.tar.bz2</a> -
download entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/prog.alt.c">prog.alt.c</a> - alternative source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/try.sh">try.sh</a> - how to run</li>
<li><a href="2014_maffiodo2.tar.bz2">2014_maffiodo2.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/2014/maffiodo2/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/.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/2014/maffiodo2/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/.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/2014/maffiodo2/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="image.rgb">image.rgb</a> - sample input in the form of a
raw RGB image</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/maffiodo2/README.md">README.md</a> - markdown source for index.html</li>
<li><a href="image.rgb">image.rgb</a> - sample input in the form of a raw RGB image</li>
</ul>
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2014/morgan/index.html
+35 -62
View File
@@ -129,9 +129,9 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Yves-Marie_Morgan">Yves-Marie
Morgan</a><br> Location: <a href="../../location.html#FR">FR</a> -
<em>French Republic</em> (<em>France</em>) <br><br></li>
<li>Name: <a href="../../authors.html#Yves-Marie_Morgan">Yves-Marie Morgan</a><br>
Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<em>France</em>)
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -147,47 +147,39 @@ Morgan</a><br> Location: <a href="../../location.html#FR">FR</a> -
<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>Think of this as a Maker Faire’s make. :-)</p>
<p>It works reasonably well. While not super ultra-featured, it does
fair well with the Makefile we supplied. Not only that, it helped
uncover a bug we had in our special Makefile rules.</p>
<p>It works reasonably well. While not super ultra-featured, it does fair well
with the Makefile we supplied. Not only that, it helped uncover a bug we had in
our special Makefile rules.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="remarks">Remarks</h3>
<p>This program is a tiny <code>make(1)</code> clone.</p>
<p>It is able to parse a subset of the <code>make(1)</code> syntax and
will execute rules for goals given in arguments if they need to (based
on timestamp of dependencies of rule targets).</p>
<p>It is able to parse a subset of the <code>make(1)</code> syntax and will execute rules for
goals given in arguments if they need to (based on timestamp of dependencies
of rule targets).</p>
<h2 id="supported-features">Supported features</h2>
<ul>
<li>Variable assignments (only recursive ones). Variable references with
recursion.</li>
<li>Variable assignments (only recursive ones). Variable references with recursion.</li>
<li>Environment variables are available.</li>
<li>It is possible to specify variables in command line:
<code>name=value</code>.</li>
<li>Variables given in command line will have precedence over variables
defined in Makefile, which will have precedence over environment
variables.</li>
<li>If no target given in command line, the first target defined will be
used.</li>
<li>It is possible to specify variables in command line: <code>name=value</code>.</li>
<li>Variables given in command line will have precedence over variables defined
in Makefile, which will have precedence over environment variables.</li>
<li>If no target given in command line, the first target defined will be used.</li>
<li>Comments, escaped comments, escaped new lines.</li>
</ul>
<p>It should be able to build programs of previous years with the
provided <code>Makefile</code> found in previous contest archives.
Simply use this program instead of <code>make</code>. It will
recursively use itself for sub-make (the <code>MAKE=</code> assignment
inside <code>Makefile</code> will be ignored to continue using
itself).</p>
<p>It should be able to build programs of previous years with the provided <code>Makefile</code>
found in previous contest archives. Simply use this program instead of <code>make</code>.
It will recursively use itself for sub-make (the <code>MAKE=</code> assignment inside
<code>Makefile</code> will be ignored to continue using itself).</p>
<h2 id="limitations-known-issues">Limitations / Known issues</h2>
<ul>
<li>There are a lot of memory leaks (not a single free).</li>
<li>The opened file is not closed.</li>
<li>The input file shall be named <code>Makefile</code>.</li>
<li>No diagnostic message, but the exit status is non zero to indicates
failure (failed command in a rule or missing target).</li>
<li>Only <code>$&lt;</code> and <code>$@</code> are supported for
automatic variables in commands.</li>
<li>No diagnostic message, but the exit status is non zero to indicates failure
(failed command in a rule or missing target).</li>
<li>Only <code>$&lt;</code> and <code>$@</code> are supported for automatic variables in commands.</li>
<li>No parallel execution (<code>-j</code> option).</li>
<li>No <code>:=</code> <code>+=</code> <code>?=</code> syntax for
variable assignment.</li>
<li>No <code>:=</code> <code>+=</code> <code>?=</code> syntax for variable assignment.</li>
<li>No built-in function available.</li>
<li>No pattern targets.</li>
<li>No pattern substitution variables.</li>
@@ -200,53 +192,34 @@ variable assignment.</li>
<pre><code>prog.c:22:15: warning: return makes integer from pointer without a cast [enabled by default]
prog.c:23:72: warning: signed and unsigned type in conditional expression [-Wsign-compare]
prog.c:12:11: warning: suggest parentheses around ‘&amp;&amp;’ within ‘||’ [-Wparentheses]</code></pre>
<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>
<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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014morgan"><a name="inventory"></a>Inventory for
2014/morgan</h1>
<h1 id="inventory-for-2014morgan"><a name="inventory"></a>Inventory for 2014/morgan</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/2014/morgan/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/try.sh">try.sh</a>
- how to run</li>
<li><a href="2014_morgan.tar.bz2">2014_morgan.tar.bz2</a> - download
entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/try.sh">try.sh</a> - how to run</li>
<li><a href="2014_morgan.tar.bz2">2014_morgan.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/2014/morgan/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/.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/2014/morgan/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/.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/2014/morgan/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/morgan/README.md">README.md</a> - markdown source for index.html</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-inventory.sh -->
2014/sinon/index.html
+46 -74
View File
@@ -130,8 +130,8 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Don_Yang">Don Yang</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of
America</em> (<em>United States</em>) <br><br></li>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -147,17 +147,16 @@ America</em> (<em>United States</em>) <br><br></li>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./glock.sh</span></span></code></pre></div>
<h2 id="try">Try:</h2>
<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>
<p>This script will ask you if you wish to try again after each run.
Type in any character other than <code>y</code> or <code>Y</code> to
exit at this point.</p>
<p>This script will ask you if you wish to try again after each run. Type in any
character other than <code>y</code> or <code>Y</code> to exit at this point.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>Try to figure out how this entry determines the optimization level
with which it had been compiled. Is this an example of undefined
behavior or unspecified behavior?</p>
<p>Try to figure out how this entry determines the optimization level with
which it had been compiled. Is this an example of undefined behavior
or unspecified behavior?</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="summary">Summary</h3>
<p><code>Sinon</code> is a game of timing, the goal is to eliminate all
enemies in under one minute.</p>
<p><code>Sinon</code> is a game of timing, the goal is to eliminate all enemies in
under one minute.</p>
<p>To start, compile and run the program. To resume, compile and run the
output repeatedly until you have won/lost the game. For example:</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">cp</span> prog.c run.c</span>
@@ -165,35 +164,33 @@ output repeatedly until you have won/lost the game. For example:</p>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="fu">gcc</span> <span class="at">-O2</span> run.c <span class="at">-o</span> run <span class="kw">&amp;&amp;</span> <span class="ex">./run</span> <span class="kw">|</span> <span class="fu">tee</span> run.c</span>
<span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a><span class="ex">...</span></span></code></pre></div>
<h3 id="details">Details</h3>
<p><code>Sinon</code> is played by compiling and running the output
repeatedly. Two factors determine what actions are taken:</p>
<p><code>Sinon</code> is played by compiling and running the output repeatedly. Two
factors determine what actions are taken:</p>
<ul>
<li>Time since last compilation.</li>
<li>Whether compiler optimizations are enabled or not.</li>
</ul>
<p>If you fire too quickly, the weapon will jam. If you fire too slowly,
you will not be able to eliminate all the enemies in time. Thus the
primary objective of the game is to time your compilations just
right.</p>
<p><code>Sinon</code> has two weapons that are selected based on
compiler optimization level:</p>
primary objective of the game is to time your compilations just right.</p>
<p><code>Sinon</code> has two weapons that are selected based on compiler optimization
level:</p>
<ul>
<li><p>“gcc -O2” or “clang -O2” will fire Hecate II, a powerful rifle
that requires longer time to cool off.</p></li>
<li><p>“gcc -O0” or “clang -O0” will fire Glock 18C, a less powerful
pistol that requires less time to cool off.</p></li>
<li><p>“gcc -O2” or “clang -O2” will fire Hecate II, a powerful rifle that
requires longer time to cool off.</p></li>
<li><p>“gcc -O0” or “clang -O0” will fire Glock 18C, a less powerful pistol
that requires less time to cool off.</p></li>
</ul>
<p>Because the weapons cool off independently, the best strategy is to
alternate between the two weapons. It is fairly easy to win the game
with this strategy even with occasional jams.</p>
<p>If your compiler does not have the right optimizations, only Glock
18C would be available. It is still possible to win, but your timing
will need to be more precise. This is effectively playing the game on
<p>If your compiler does not have the right optimizations, only Glock 18C
would be available. It is still possible to win, but your timing will
need to be more precise. This is effectively playing the game on
“hard” mode. It is worth trying this mode even if you have the right
compilers.</p>
<h3 id="compatibility">Compatibility</h3>
<p><code>Sinon</code> has been tested and verified to work on these
platforms:</p>
<p><code>Sinon</code> has been tested and verified to work on these platforms:</p>
<ul>
<li>gcc 4.4.3 on Linux.</li>
<li>gcc 4.4.5 on Linux.</li>
@@ -208,72 +205,47 @@ available).</li>
</ul>
<p><code>Sinon</code> is intended to be played in a 80x25 terminal.</p>
<h3 id="miscellaneous-features">Miscellaneous features</h3>
<p><code>Sinon</code> might be the first game that uses compiler
optimization level as a primary input.</p>
<p><code>Sinon</code> has a demo mode that plays the game automatically.
Make sure that there are no files named “run” and “run.c” in current
directory (they will be overwritten) and run:</p>
<p><code>Sinon</code> might be the first game that uses compiler optimization level as
a primary input.</p>
<p><code>Sinon</code> has a demo mode that plays the game automatically. Make sure
that there are no files named “run” and “run.c” in current directory
(they will be overwritten) and run:</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="fu">perl</span> prog.c <span class="kw">|</span> <span class="fu">bash</span></span></code></pre></div>
<p>File size and CRC32 of <a href="prog.c">prog.c</a> are embedded in
line 7.</p>
<p>Process for making <code>Sinon</code> is included in <a
href="spoiler.html">spoiler.html</a>.</p>
<p>Layout of this code is based on Asada Shino, also known as
“<code>Sinon</code>”, from Sword Art Online.</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>
<p>File size and CRC32 of <a href="prog.c">prog.c</a> are embedded in line 7.</p>
<p>Process for making <code>Sinon</code> is included in <a href="spoiler.html">spoiler.html</a>.</p>
<p>Layout of this code is based on Asada Shino, also known as “<code>Sinon</code>”,
from Sword Art Online.</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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014sinon"><a name="inventory"></a>Inventory for
2014/sinon</h1>
<h1 id="inventory-for-2014sinon"><a name="inventory"></a>Inventory for 2014/sinon</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/2014/sinon/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/glock.sh">glock.sh</a>
- how to run</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/hecate.sh">hecate.sh</a>
- how to run</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/try.sh">try.sh</a>
- how to run</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/glock.sh">glock.sh</a> - how to run</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/hecate.sh">hecate.sh</a> - how to run</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/try.sh">try.sh</a> - how to run</li>
<li><a href="spoiler.html">spoiler.html</a> - SPOILER WARNING</li>
<li><a href="2014_sinon.tar.bz2">2014_sinon.tar.bz2</a> - download entry
source</li>
<li><a href="2014_sinon.tar.bz2">2014_sinon.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/2014/sinon/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/.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/2014/sinon/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/.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/2014/sinon/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/sinon/README.md">README.md</a> - markdown source for index.html</li>
</ul>
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2014/skeggs/index.html
+111 -153
View File
@@ -130,8 +130,8 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Cel_Skeggs">Cel Skeggs</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of
America</em> (<em>United States</em>) <br><br></li>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
<br><br></li>
</ul>
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@@ -143,20 +143,19 @@ America</em> (<em>United States</em>) <br><br></li>
<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></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">./prog</span></span></code></pre></div>
<p>HINT: Try pressing the left and right arrow keys as needed. Also try
pressing space/enter to select options. Pressing Q or Escape may end the
fun before you are ready. :-)</p>
<p>HINT: Try pressing the left and right arrow keys as needed.
Also try pressing space/enter to select options.
Pressing Q or Escape may end the fun before you are ready. :-)</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>When the code looks like lemons, it is probably because the
LEMONPEOPLE, or at least the LEMONLORD was involved. :-)</p>
<p>Look at some of the C pre-processor macros in the source code. Ask
yourself why C source is being passed as arguments to some of those
macros.</p>
<p>Now you may observe, while it is running, that some C source code is
being written to a file and then compiled. And yet that compiled code is
somehow executed from <code>main()</code>. But how? How is
<code>main()</code> able to call code that was written and compiled just
in time for execution?</p>
<p>When the code looks like lemons, it is probably because the LEMONPEOPLE,
or at least the LEMONLORD was involved. :-)</p>
<p>Look at some of the C pre-processor macros in the source code.
Ask yourself why C source is being passed as arguments to some
of those macros.</p>
<p>Now you may observe, while it is running, that some C source code is being
written to a file and then compiled. And yet that compiled code is somehow
executed from <code>main()</code>. But how? How is <code>main()</code> able to call code that was
written and compiled just in time for execution?</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="table-of-contents">TABLE OF CONTENTS</h3>
<ul>
@@ -167,142 +166,117 @@ in time for execution?</p>
<li>Q&amp;A</li>
</ul>
<h3 id="backstory">BACKSTORY</h3>
<p>It was ten yours ago when THE LEMONPEOPLE invaded, juicing all in
their path.</p>
<p>Attempting to free the Earth from their tyranny, you have endured
pulpy and sour battles.</p>
<p>This has now culminated in you reaching the throne room of THE
LEMONLORD.</p>
<p>It was ten yours ago when THE LEMONPEOPLE invaded, juicing all in their path.</p>
<p>Attempting to free the Earth from their tyranny, you have endured pulpy and
sour battles.</p>
<p>This has now culminated in you reaching the throne room of THE LEMONLORD.</p>
<p>Armed with your right-facing curly brace, you charge into battle.</p>
<p>(Use left and right arrow keys and space/enter to select options.
Press Q or Escape to quit.)</p>
<p>(Use left and right arrow keys and space/enter to select options. Press Q or
Escape to quit.)</p>
<h3 id="known-compiler-warnings">KNOWN COMPILER WARNINGS</h3>
<p>Unfortunately, it became very difficult to get this entry to fit
within the size requirements. It’s currently at 2052 according to <a
href="../iocccsize.c">iocccsize</a>, and 3994 according to
<code>wc -c</code>.</p>
<p>The current size is a third to a half of the original size before
compression.</p>
<p>Unfortunately, it became very difficult to get this entry to fit within the
size requirements. It’s currently at 2052 according to
<a href="../iocccsize.c">iocccsize</a>, and 3994 according to <code>wc -c</code>.</p>
<p>The current size is a third to a half of the original size before compression.</p>
<p>Due to this, it does LOTS of things that subtly annoy compilers!</p>
<ul>
<li><ol start="10" type="1">
<li>data argument not used by format string</li>
</ol>
<p>This occurs because some of the <code>fprintf(3)</code> invocations
don’t use all their parameters. The program should still work
fine!</p></li>
<p>This occurs because some of the <code>fprintf(3)</code> invocations don’t use all their
parameters. The program should still work fine!</p></li>
<li><ol type="1">
<li>using the result of an assignment as a condition without
parentheses</li>
<li>using the result of an assignment as a condition without parentheses</li>
</ol>
<p>Somewhere, I needed to set a variable and then branch on the result.
The shortest way was to combine them. Some self-proclaimed “EXPERTS”
think this is a bad programming practice, but what do they know?
:P</p></li>
<p>Somewhere, I needed to set a variable and then branch on the result. The
shortest way was to combine them. Some self-proclaimed “EXPERTS” think this
is a bad programming practice, but what do they know? :P</p></li>
<li><ol type="1">
<li>implicit declaration of function ‘time’ is invalid in C99</li>
</ol>
<p>An <code>#include</code> statement is expensive, and I’m
broke.</p></li>
<p>An <code>#include</code> statement is expensive, and I’m broke.</p></li>
<li><ol type="1">
<li>control may reach end of non-void function</li>
</ol>
<p>Turns out that sometimes, a <code>return</code> statement is too
much. This will never actually occur, but some C compilers think they
know more about my program than I do! :P</p></li>
<li><p>(?) Under some systems, <code>-fPIC</code> is irrelevant for
shared libraries. If so, you should remove it from the
Makefile.</p></li>
<p>Turns out that sometimes, a <code>return</code> statement is too much. This will never
actually occur, but some C compilers think they know more about my program
than I do! :P</p></li>
<li><p>(?) Under some systems, <code>-fPIC</code> is irrelevant for shared libraries. If so,
you should remove it from the Makefile.</p></li>
</ul>
<h2
id="obfuscation-what-obfuscation-this-is-a-perfectly-normal-c-program">OBFUSCATION?
WHAT OBFUSCATION? THIS IS A PERFECTLY NORMAL C PROGRAM!</h2>
<h2 id="obfuscation-what-obfuscation-this-is-a-perfectly-normal-c-program">OBFUSCATION? WHAT OBFUSCATION? THIS IS A PERFECTLY NORMAL C PROGRAM!</h2>
<h1 id="the-cool-part">THE COOL PART</h1>
<p>Take a close look at how it works. Notice that it’s passing C code to
certain macros…</p>
<p>Guess what? It’s a very simple kind of JIT compiler, though not used
as deeply as would be cool.</p>
<p>Essentially, it generates C code at runtime, dumps it to a file, and
then runs a C compiler on that file, telling the C compiler to generate
a shared library. Then it loads the shared library with
<code>dlopen(3)</code>, and…</p>
<p>Take a close look at how it works. Notice that it’s passing C code to certain
macros…</p>
<p>Guess what? It’s a very simple kind of JIT compiler, though not used as deeply
as would be cool.</p>
<p>Essentially, it generates C code at runtime, dumps it to a file, and then runs
a C compiler on that file, telling the C compiler to generate a shared library.
Then it loads the shared library with <code>dlopen(3)</code>, and…</p>
<p>Ignores the result?</p>
<p>That can’t be right.</p>
<p>Well, it is. Instead of using <code>dlsym(3)</code> like a normal
programmer, I mark one of the generated functions with
<code>__attribute__((constructor))</code>. This means that it gets
called immediately on load, so it can make its functions available.</p>
<p>But wait - how can it link into the main program, either? It has no
way to reference anything in the main executable!</p>
<p>But it does: I’m injecting certain addresses into the generated code,
which it then casts to pointers and accesses! It uses this to make
certain functions available to the main program, so the main program’s
generated code will then enter itself where it’s needed.</p>
<p>Well, it is. Instead of using <code>dlsym(3)</code> like a normal programmer, I mark one of the
generated functions with <code>__attribute__((constructor))</code>. This means that it
gets called immediately on load, so it can make its functions available.</p>
<p>But wait - how can it link into the main program, either? It has no way to
reference anything in the main executable!</p>
<p>But it does: I’m injecting certain addresses into the generated code, which it
then casts to pointers and accesses! It uses this to make certain functions
available to the main program, so the main program’s generated code will then
enter itself where it’s needed.</p>
<h1 id="the-not-so-cool-part">THE NOT-SO-COOL PART</h1>
<p>There are also lots of <code>#defines</code>.</p>
<p>No, these are not obfuscation. These are compression.</p>
<p>There is a little bit of obfuscation gained from using the
stringification operator. (I can never remember what it’s actually
called, but it’s the <code>#</code> operator in a preprocessor macro) -
this allows me to pass C code in arguments to the macros, meaning that
it gets interpreted as C code instead of a string by the <a
href="../iocccsize.c">iocccsize</a> tool, so it gets counted as smaller!
:D</p>
<p>There is a little bit of obfuscation gained from using the stringification
operator. (I can never remember what it’s actually called, but it’s the <code>#</code>
operator in a preprocessor macro) - this allows me to pass C code in arguments
to the macros, meaning that it gets interpreted as C code instead of a string
by the <a href="../iocccsize.c">iocccsize</a> tool, so it gets counted as smaller! :D</p>
<h1 id="a-slightly-cool-part">A SLIGHTLY COOL PART</h1>
<p>As part of the JIT compiling, the program hides the fact that it
needs ncurses: it just links ncurses with one of the generated shared
libraries, and then can access the contents of the ncurses library!</p>
<p>As part of the JIT compiling, the program hides the fact that it needs ncurses:
it just links ncurses with one of the generated shared libraries, and then can
access the contents of the ncurses library!</p>
<h1 id="wait-what">WAIT WHAT</h1>
<p>Also, note where functions start and end…</p>
<p>I’ve messed with the syntax so that it’s not actually formatted
properly. It almost looks like it is, but it isn’t.</p>
<p>This isn’t significant obfuscation as long as you run it through a C
source code beautifier.</p>
<p>I’ve messed with the syntax so that it’s not actually formatted properly. It
almost looks like it is, but it isn’t.</p>
<p>This isn’t significant obfuscation as long as you run it through a C source
code beautifier.</p>
<p>But wait… if you aren’t careful, running it through a C source code
beautifier won’t work. Remember how I’m interlacing generated C code
with actual C code? Note that this WRECKS some beautifiers. I hope you
have a good one!</p>
<p>(There’s an obvious way around this but I’m not going to spell it out
for you. That’d be too easy!)</p>
beautifier won’t work. Remember how I’m interlacing generated C code with
actual C code? Note that this WRECKS some beautifiers. I hope you have a good
one!</p>
<p>(There’s an obvious way around this but I’m not going to spell it out for you.
That’d be too easy!)</p>
<h3 id="miscellaneous-stuff">MISCELLANEOUS STUFF</h3>
<p>Do note that there are some other miscellaneous obfuscations, but
they should be easy to understand once you figure out the ones
above.</p>
<p>Do note that there are some other miscellaneous obfuscations, but they should
be easy to understand once you figure out the ones above.</p>
<h3 id="troubleshooting-guide">TROUBLESHOOTING GUIDE</h3>
<p>This program is a very easy program to cause to fail!</p>
<p>Some things to check</p>
<ul>
<li><p>On line 16, where it says <code>%cinclude "prog.c"</code>, is
<code>prog.c</code> the name of the original source code file?</p></li>
<li><p>On line 16, where it says <code>%cinclude "prog.c"</code>, is <code>prog.c</code> the name of the
original source code file?</p></li>
<li><p>Do you have ncurses installed?</p></li>
<li><p>Does your system have <code>ncurses.h</code> (like a nice system)
or <code>ncurses/ncurses.h</code> (like a rude system) ?</p>
<p>If it’s the latter (or some other path), you’ll need to update line
97.</p>
<li><p>Does your system have <code>ncurses.h</code> (like a nice system) or
<code>ncurses/ncurses.h</code> (like a rude system) ?</p>
<p>If it’s the latter (or some other path), you’ll need to update line 97.</p>
<p>(I had to do this under Cygwin.)</p></li>
<li><p>Does your system need <code>-fPIC</code> (or other arcane
invocations) to compile a shared library? If so, make sure that you
include it in the <code>-DCC</code> argument in the build
script.</p></li>
<li><p>Does your system have a vague dislike for <code>-fPIC</code>?
(Like Cygwin.) You might need to remove it from the build
script.</p></li>
<li><p>Does your system support
<code>__attribute__((constructor))</code>? It needs to.</p></li>
<li><p>Check the file <code>err</code>. Maybe it will help you figure
out why a runtime- generated program failed. The failing program should
be found in <code>t.c</code>.</p></li>
<li><p>Can’t run a beautifier on the source code? I’m not going to help
you there.</p></li>
<li><p>Does your system need <code>-fPIC</code> (or other arcane invocations) to compile a
shared library? If so, make sure that you include it in the <code>-DCC</code> argument in
the build script.</p></li>
<li><p>Does your system have a vague dislike for <code>-fPIC</code>? (Like Cygwin.) You might
need to remove it from the build script.</p></li>
<li><p>Does your system support <code>__attribute__((constructor))</code>? It needs to.</p></li>
<li><p>Check the file <code>err</code>. Maybe it will help you figure out why a runtime-
generated program failed. The failing program should be found in <code>t.c</code>.</p></li>
<li><p>Can’t run a beautifier on the source code? I’m not going to help you there.</p></li>
</ul>
<p>I’ve tested it on the following platforms, in case you need to try it
on one:</p>
<p>I’ve tested it on the following platforms, in case you need to try it on one:</p>
<ul>
<li>64-bit Windows 7 32-bit Cygwin with gcc 4.8.2 and standards c89,
c90, c99, and c11. Note that the program ran as 32-bit due to the
version of cygwin.</li>
<li>64-bit Arch Linux with gcc 4.9.1 and standards c89, c90, c99,
c11.</li>
<li>64-bit Windows 7 32-bit Cygwin with gcc 4.8.2 and standards c89, c90, c99,
and c11. Note that the program ran as 32-bit due to the version of cygwin.</li>
<li>64-bit Arch Linux with gcc 4.9.1 and standards c89, c90, c99, c11.</li>
<li>64-bit Arch Linux with clang 3.5.0 and standards c89 and c11.</li>
</ul>
<p>I ran out of time to test it on more systems.</p>
@@ -311,60 +285,44 @@ c11.</li>
<li><p>Who am I?</p>
<p>Yes.</p></li>
<li><p>Why doesn’t your program require a pet fish license?</p>
<p>THE LEMONLORD’s pet LEMONFISH was not rendered in the game, and so
does not require a pet fish license.</p></li>
<p>THE LEMONLORD’s pet LEMONFISH was not rendered in the game, and so does not
require a pet fish license.</p></li>
<li><p>Was this inspired by anything?</p>
<p>Yes, this was inspired by a minigame from an open-source codebase of
Space Station 13. I didn’t, however, look at the minigame at all during
the development of this entry.</p></li>
<li><p>What’s the length of this README file according to the <a
href="../iocccsize.c">iocccsize</a> tool?</p>
<p>$ ./iocccsize -i &lt; README.md 6057</p></li>
<p>Yes, this was inspired by a minigame from an open-source codebase of Space
Station 13. I didn’t, however, look at the minigame at all during the
development of this entry.</p></li>
<li><p>What’s the length of this README file according to the
<a href="../iocccsize.c">iocccsize</a> tool?</p>
<p>$ ./iocccsize -i &lt; README.md
6057</p></li>
</ul>
<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>
<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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014skeggs"><a name="inventory"></a>Inventory for
2014/skeggs</h1>
<h1 id="inventory-for-2014skeggs"><a name="inventory"></a>Inventory for 2014/skeggs</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/2014/skeggs/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a href="2014_skeggs.tar.bz2">2014_skeggs.tar.bz2</a> - download
entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="2014_skeggs.tar.bz2">2014_skeggs.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/2014/skeggs/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/.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/2014/skeggs/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/.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/2014/skeggs/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/skeggs/README.md">README.md</a> - markdown source for index.html</li>
</ul>
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2014/vik/index.html
+46 -76
View File
@@ -130,8 +130,8 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Daniel_Vik">Daniel Vik</a><br>
Location: <a href="../../location.html#US">US</a> - <em>United States of
America</em> (<em>United States</em>) <br><br></li>
Location: <a href="../../location.html#US">US</a> - <em>United States of America</em> (<em>United States</em>)
<br><br></li>
</ul>
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@@ -141,14 +141,13 @@ America</em> (<em>United States</em>) <br><br></li>
<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></span></code></pre></div>
<p>There is an alternate version that will theoretically work with
Windows compilers (if anything in Windows works :-) ). See the <a
href="#alternate-code">Alternate code</a> section below.</p>
<p>There is an alternate version that will theoretically work with Windows
compilers (if anything in Windows works :-) ). See the <a href="#alternate-code">Alternate
code</a> section below.</p>
<h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
<p>The current status of this entry is:</p>
<pre><code>STATUS: known bug - please help us fix</code></pre>
<p>For more detailed information see <a
href="../../bugs.html#2014_vik">2014 vik bugs</a>.</p>
<p>For more detailed information see <a href="../../bugs.html#2014_vik">2014 vik bugs</a>.</p>
<h2 id="to-use">To use:</h2>
<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="bu">echo</span> foo <span class="kw">|</span> <span class="ex">./prog</span> <span class="op">&gt;</span> audio_file.raw</span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a></span>
@@ -156,13 +155,12 @@ href="../../bugs.html#2014_vik">2014 vik bugs</a>.</p>
<h2 id="try">Try:</h2>
<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="ex">./try.sh</span></span></code></pre></div>
<h2 id="alternate-code">Alternate code:</h2>
<p>The alternate code, <a href="prog.alt.c">prog.alt.c</a>, is based on
the author’s instructions on how to get it to work with Windows.</p>
<p>The alternate code, <a href="prog.alt.c">prog.alt.c</a>, is based on the author’s
instructions on how to get it to work with Windows.</p>
<h3 id="alternate-build">Alternate build:</h3>
<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="fu">make</span> alt</span></code></pre></div>
<h3 id="alternate-use">Alternate use:</h3>
<p>Use <code>prog.alt</code> as you would <code>prog</code> above as
well as below.</p>
<p>Use <code>prog.alt</code> as you would <code>prog</code> above as well as below.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>This program sets a new tone for obfuscation. But do you understand
what it says about obfuscation? Perhaps:</p>
@@ -172,92 +170,64 @@ what it says about obfuscation? Perhaps:</p>
<p>might help? :-)</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="remarks">Remarks</h3>
<p>This program converts ASCII text to Morse audio file and vice versa.
As far as I can tell, there are at least six chocolate references in
this program.</p>
<p>This program can convert text to Morse to a raw 44.1kHz stereo audio
file. Via streaming to <code>mplayer(1)</code>, you can listen to the
Morse audio.</p>
<p>Don’t forget the last ‘<code>-</code>’ as it makes
<code>mplayer(1)</code> read from <code>stdin</code>.</p>
<h2 id="convert-audio-file-with-morse-signals-to-text">Convert audio
file with Morse signals to text</h2>
<p>This program converts ASCII text to Morse audio file and vice versa. As far as
I can tell, there are at least six chocolate references in this program.</p>
<p>This program can convert text to Morse to a raw 44.1kHz stereo audio file.
Via streaming to <code>mplayer(1)</code>, you can listen to the Morse audio.</p>
<p>Don’t forget the last ‘<code>-</code>’ as it makes <code>mplayer(1)</code> read from <code>stdin</code>.</p>
<h2 id="convert-audio-file-with-morse-signals-to-text">Convert audio file with Morse signals to text</h2>
<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> e <span class="op">&lt;</span> audio_file.raw</span></code></pre></div>
<p>or alternatively pass a .wav file as input.</p>
<p>The preferred input format 44.1kHz stereo, but it does a decent job
on mono input and different frequencies as well.</p>
<p>The preferred input format 44.1kHz stereo, but it does a decent job on mono
input and different frequencies as well.</p>
<h3 id="portability">Portability</h3>
<p>The program is portable to most platforms. The only system dependency
is that the program relies on writing binary data to
<code>stdout</code>.</p>
<p>Microsoft compilers add a carriage return to newlines, and to compile
the program with this platform, the following line can be added to
<code>main()</code> before any code in order for the program to run
correctly:</p>
<p>The program is portable to most platforms. The only system dependency is that
the program relies on writing binary data to <code>stdout</code>.</p>
<p>Microsoft compilers add a carriage return to newlines, and to compile the
program with this platform, the following line can be added to <code>main()</code> before
any code in order for the program to run correctly:</p>
<div class="sourceCode" id="cb9"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a>_setmode<span class="op">(</span>_fileno<span class="op">(</span>stdout<span class="op">),</span> <span class="bn">0x8000</span><span class="op">);</span></span></code></pre></div>
<p>NOTE: see the <a href="prog.alt.c">alternate code</a> for this.</p>
<h3 id="known-issues">Known Issues</h3>
<p>The program uses a quite simple algorithm for detecting tone on and
off events in the Morse signal. Hence the program does not work well
with noisy input signals. I have tested it with several samples of man
made Morse recordings as well as computer generated ones.</p>
<p>Generally, any recording from ham radio transmissions does not decode
due to noise and echoes. Other man made recordings may decode, but some
characters can be incorrect due to too big variation in length of tones
and pauses. However I found some man made recordings on that decode
reasonable well.</p>
<p>If a recording doesn’t decode, you could try to pre-process the input
with a narrow bandpass filter on the frequency of the transmission.</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>
<p>The program uses a quite simple algorithm for detecting tone on and off events
in the Morse signal. Hence the program does not work well with noisy input
signals. I have tested it with several samples of man made Morse recordings as
well as computer generated ones.</p>
<p>Generally, any recording from ham radio transmissions does not decode due to
noise and echoes. Other man made recordings may decode, but some characters
can be incorrect due to too big variation in length of tones and pauses.
However I found some man made recordings on that decode reasonable well.</p>
<p>If a recording doesn’t decode, you could try to pre-process the input with a
narrow bandpass filter on the frequency of the transmission.</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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014vik"><a name="inventory"></a>Inventory for
2014/vik</h1>
<h1 id="inventory-for-2014vik"><a name="inventory"></a>Inventory for 2014/vik</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/2014/vik/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/prog.alt.c">prog.alt.c</a>
- alternative source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/try.sh">try.sh</a>
- how to run</li>
<li><a href="2014_vik.tar.bz2">2014_vik.tar.bz2</a> - download entry
source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/prog.alt.c">prog.alt.c</a> - alternative source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/try.sh">try.sh</a> - how to run</li>
<li><a href="2014_vik.tar.bz2">2014_vik.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/2014/vik/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/.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/2014/vik/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/.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/2014/vik/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/vik/README.md">README.md</a> - markdown source for index.html</li>
</ul>
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2014/wiedijk/index.html
+38 -69
View File
@@ -129,9 +129,9 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Freek_Wiedijk">Freek
Wiedijk</a><br> Location: <a href="../../location.html#NL">NL</a> -
<em>Kingdom of the Netherlands</em> (<em>Netherlands</em>) <br><br></li>
<li>Name: <a href="../../authors.html#Freek_Wiedijk">Freek Wiedijk</a><br>
Location: <a href="../../location.html#NL">NL</a> - <em>Kingdom of the Netherlands</em> (<em>Netherlands</em>)
<br><br></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -145,103 +145,72 @@ Wiedijk</a><br> Location: <a href="../../location.html#NL">NL</a> -
<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">./prog</span></span></code></pre></div>
<h2 id="try">Try:</h2>
<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>
<p>By default that will use <code>indent(1)</code> found by the shell
<code>type -P indent</code> and <code>sed(1)</code> found by the shell
<code>type -P sed</code> but if you want to change these, say to try a
different beautifier, you can do it like:</p>
<p>By default that will use <code>indent(1)</code> found by the shell <code>type -P indent</code> and
<code>sed(1)</code> found by the shell <code>type -P sed</code> but if you want to change these, say
to try a different beautifier, you can do it like:</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="va">INDENT</span><span class="op">=</span>bcpp <span class="ex">./try.sh</span></span></code></pre></div>
<p>which would change it to use <code>bcpp(1)</code> instead of
<code>indent(1)</code>. Do similar for <code>sed(1)</code> only use the
name <code>SED</code>.</p>
<p>which would change it to use <code>bcpp(1)</code> instead of <code>indent(1)</code>. Do similar for
<code>sed(1)</code> only use the name <code>SED</code>.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>C11 features definitely help this entry to be as concise as it
is.</p>
<p>The judges would like to think that they had almost understood how
this entry works.</p>
<p>C11 features definitely help this entry to be as concise as it is.</p>
<p>The judges would like to think that they had almost understood how this entry works.</p>
<p>If you win a bet by demonstrating this entry, please let us know.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="remarks">Remarks</h3>
<ul>
<li>Computes the factorial function.</li>
<li>No loops, no explicit recursion.</li>
<li>Untyped C without any casts, using a <code>w</code> word
datatype.</li>
<li>Varargs not essential, <code>w(*)(w,w*)</code> works just as
well.</li>
<li>Untyped C without any casts, using a <code>w</code> word datatype.</li>
<li>Varargs not essential, <code>w(*)(w,w*)</code> works just as well.</li>
<li>Conforming to ISO C.</li>
<li>No warnings when compiled with
<code>-std=c99 -Wall -Wextra -pedantic</code>.</li>
<li>No warnings when compiled with <code>-std=c99 -Wall -Wextra -pedantic</code>.</li>
<li>Comments in the code explain what this really is about.</li>
<li>C as a functional programming language: untyped lambda calculus
compiled to executable C functions.</li>
<li>Untagged closures (just a function pointer followed by some
values).</li>
<li>Recursion implemented through Curry’s paradoxical combinator
<code>Y</code>.</li>
<li>The readable implementation of <code>Y</code> is on lines
29-30:</li>
<li>C as a functional programming language: untyped lambda calculus compiled to
executable C functions.</li>
<li>Untagged closures (just a function pointer followed by some values).</li>
<li>Recursion implemented through Curry’s paradoxical combinator <code>Y</code>.</li>
<li>The readable implementation of <code>Y</code> is on lines 29-30:</li>
</ul>
<pre><code>W_f = \x.f(xx)
Y = \f.W_f W_f</code></pre>
<ul>
<li>A mixture of strict and lazy evaluation, with a <code>_</code> force
function (John Tromp notes that if Turing’s fixed-point combinator
<code>(\xy.y\z.xxyz)(\xy.y\z.xxyz)</code> had been used, all
applications could have been strict).</li>
<li>Uses <code>Y</code> to implement factorial on native
<code>int</code>s.</li>
<li>A mixture of strict and lazy evaluation, with a <code>_</code> force function
(John Tromp notes that if Turing’s fixed-point combinator
<code>(\xy.y\z.xxyz)(\xy.y\z.xxyz)</code> had been used,
all applications could have been strict).</li>
<li>Uses <code>Y</code> to implement factorial on native <code>int</code>s.</li>
<li>10! seconds = 6 weeks.</li>
<li>Answers the <a
href="https://hitchhikers.fandom.com/wiki/42">ultimate question of life,
the universe and everything</a>.</li>
<li>Answers the <a href="https://hitchhikers.fandom.com/wiki/42">ultimate question of life, the universe and
everything</a>.</li>
</ul>
<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>
<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>
<p>For more information, see: https://creativecommons.org/licenses/by-sa/4.0/</p>
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<h1 id="inventory-for-2014wiedijk"><a name="inventory"></a>Inventory for
2014/wiedijk</h1>
<h1 id="inventory-for-2014wiedijk"><a name="inventory"></a>Inventory for 2014/wiedijk</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/2014/wiedijk/prog.c">prog.c</a>
- entry source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/Makefile">Makefile</a>
- entry Makefile</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/prog.orig.c">prog.orig.c</a>
- original source</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/try.sh">try.sh</a>
- how to run</li>
<li><a href="2014_wiedijk.tar.bz2">2014_wiedijk.tar.bz2</a> - download
entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/prog.c">prog.c</a> - entry source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/Makefile">Makefile</a> - entry Makefile</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/prog.orig.c">prog.orig.c</a> - original source</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/try.sh">try.sh</a> - how to run</li>
<li><a href="2014_wiedijk.tar.bz2">2014_wiedijk.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/2014/wiedijk/.entry.json">.entry.json</a>
- description of entry in JSON</li>
<li><a
href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/.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/2014/wiedijk/.entry.json">.entry.json</a> - description of entry in JSON</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/.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/2014/wiedijk/README.md">README.md</a>
- markdown source for index.html</li>
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2014/wiedijk/README.md">README.md</a> - markdown source for index.html</li>
</ul>
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