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improved indentation and whitespace for markdown code blocks

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All code blocks in markdown have been intended by at least 4 spaces.

We add `--tab-stop=8` to all `pandoc(1)` executions in order to set
a better tab stop indentation, especially for tab intended code blocks.

Changed `bin/pandoc-wrapper.sh` VERSION from "1.5.3 2024-03-26"
to "1.6 2024-03-31".

Fixed `1991/brnstnd/sorta.README.md` so that the sorta code
is code blocks.

Removed unneeded paragraph group in copyright in `inc/footer.default.html`.

Fixed excess whitespace after list Author on entry `index.html` page.

Changed `bin/output-index-author.sh` VERSION from "1.5.2 2024-03-26"
to "1.6 2024-03-31".

Performed `make www` to perform the above and test under macOS.

TODO: Fix the problem of the initial line of code being extra intended.
TODO: Fix excess whitespace around code that is inline.
This commit is contained in:
Landon Curt Noll committed 2024-04-01 04:48:48 -07:00
1 parent b84c27ce02
commit a996f8d2b8
734 files changed
+16723 -16963
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2015/README.md
+8 -8
View File
@@ -67,14 +67,14 @@ and 22 (one third of 666).
Rule 22, now known as **Catch 22** states:
```
| 22) Your source code, data files, remarks and program output must NOT
| identify the authors of your code. The judges STRONGLY prefer to
| not know who is submitting entries to the IOCCC.
| 22) Your source code, data files, remarks and program output must NOT
| identify the authors of your code. The judges STRONGLY prefer to
| not know who is submitting entries to the IOCCC.
| The "Peter Honeyman is exempt" guideline also applies to this rule.
| Identifying yourself, in an obvious way in your code, data, remarks
| or program output, unless you are Peter Honeyman or pretending
| to be Peter Honeyman, will be grounds for disqualification of your entry.
| The "Peter Honeyman is exempt" guideline also applies to this rule.
| Identifying yourself, in an obvious way in your code, data, remarks
| or program output, unless you are Peter Honeyman or pretending
| to be Peter Honeyman, will be grounds for disqualification of your entry.
```
A number of other entries were based on [iocccsize.c](iocccsize.c), making
@@ -83,7 +83,7 @@ derivative works rather than original works.
Still other entries were too large, violating the first line of rule 2:
```
2) The size of your program source must be <= 4096 bytes in length.
2) The size of your program source must be <= 4096 bytes in length.
```
While these entries might have passed under the 2053 limit for iocccsize,
2015/burton/README.md
+13 -13
View File
@@ -1,20 +1,20 @@
## To build:
```sh
make
make
```
## To use:
```sh
./prog "expression"
./prog "expression"
```
or:
```sh
./prog
./prog
```
Type in expressions on standard input.
@@ -23,13 +23,13 @@ Type in expressions on standard input.
## Try:
```sh
./try.sh
./try.sh
```
Notice how the script reads in from a file. If you type just:
```sh
./prog
./prog
```
it will prompt you in the same way. Send ctrl-c to exit.
@@ -38,7 +38,7 @@ it will prompt you in the same way. Send ctrl-c to exit.
Finally, if you wish to read the man page:
```sh
man ./calc.1
man ./calc.1
```
@@ -52,7 +52,7 @@ author's remarks below.
### Alternate build:
```sh
make alt
make alt
```
@@ -110,7 +110,7 @@ However, unlike any other calculator source code the author is aware of,
this one contains no digits. At all. Anywhere. As in
```sh
grep '[0-9]' prog.c || echo no digits!
grep '[0-9]' prog.c || echo no digits!
```
Nor are the digits simply obfuscated. There are no character constants. There
@@ -192,8 +192,8 @@ long`. Changing the two `long long` typedefs to `long`, and compiling with `gcc
shifts mod 32:
```
1<<48
65536 0x00010000
1<<48
65536 0x00010000
```
gcc 4.2.1 without arguments compiles cleanly (e.g. `cc prog.c -o prog`).
@@ -203,7 +203,7 @@ clang 3.6.0 lives up to its namesake, resounding on non-problems.
To stifle these complaints:
```
-Wno-return-type -Wno-parentheses -Wno-empty-body
-Wno-return-type -Wno-parentheses -Wno-empty-body
```
When invoked with `-ansi -pedantic`, there are two warnings, which can be ignored:
@@ -223,8 +223,8 @@ If the program name begins with an `e`, it echoes `stdin` to `stdout`.
This allows for a convenient test suite:
```sh
ln -sf prog eprog
PATH=. eprog < test.in | diff - test.out
ln -sf prog eprog
PATH=. eprog < test.in | diff - test.out
```
### Spoilers:
2015/burton/index.html
+14 -15
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Dave_Burton">Dave Burton</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>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,25 +141,25 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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 class="st">&quot;expression&quot;</span></span></code></pre></div>
<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="st">&quot;expression&quot;</span></span></code></pre></div>
<p>or:</p>
<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span></code></pre></div>
<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></span></code></pre></div>
<p>Type in expressions on standard input.</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>
<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>
<p>Notice how the script reads in from a file. If you type just:</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></code></pre></div>
<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></code></pre></div>
<p>it will prompt you in the same way. Send ctrl-c to exit.</p>
<p>Finally, if you wish to read the man page:</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">man</span> ./calc.1</span></code></pre></div>
<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">man</span> ./calc.1</span></code></pre></div>
<h2 id="alternate-code">Alternate code:</h2>
<p>An alternate version of this entry, <a href="prog.alt.c">prog.alt.c</a>, is provided.
This alternate code is discussed in the “prog.c vs prog.alt.c” section of the
author’s remarks below.</p>
<h3 id="alternate-build">Alternate build:</h3>
<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> alt</span></code></pre></div>
<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> 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.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
@@ -190,7 +189,7 @@ corrected by adding <code>-fsigned-char</code> to the compile line.</p>
<p>Yes, this is another calculator program.</p>
<p>However, unlike any other calculator source code the author is aware of,
this one contains no digits. At all. Anywhere. As in</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">grep</span> <span class="st">&#39;[0-9]&#39;</span> prog.c <span class="kw">||</span> <span class="bu">echo</span> no digits!</span></code></pre></div>
<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">grep</span> <span class="st">&#39;[0-9]&#39;</span> prog.c <span class="kw">||</span> <span class="bu">echo</span> no digits!</span></code></pre></div>
<p>Nor are the digits simply obfuscated. There are no character constants. There
is only one single, short string, and it does not contain any obfuscated digits.
And yet the output is in decimal and hexadecimal, and it accepts octal, decimal,
@@ -246,13 +245,13 @@ they are to write.</p></li>
<h3 id="compiler-warnings">Compiler warnings</h3>
<p><code>calc</code> is C99 compliant, and is ANSI/C90 compliant except for wanting 64-bit <code>long long</code>. Changing the two <code>long long</code> typedefs to <code>long</code>, and compiling with <code>gcc -m32</code> yields a program that operates on 32-bit values, with wrap-around of
shifts mod 32:</p>
<pre><code>1&lt;&lt;48
65536 0x00010000</code></pre>
<pre><code> 1&lt;&lt;48
65536 0x00010000</code></pre>
<p>gcc 4.2.1 without arguments compiles cleanly (e.g. <code>cc prog.c -o prog</code>).
This is my workaday compiler. gcc is also clean with <code>-ansi</code>, and <code>-std=c99</code>.</p>
<p>clang 3.6.0 lives up to its namesake, resounding on non-problems.
To stifle these complaints:</p>
<pre><code>-Wno-return-type -Wno-parentheses -Wno-empty-body</code></pre>
<pre><code> -Wno-return-type -Wno-parentheses -Wno-empty-body</code></pre>
<p>When invoked with <code>-ansi -pedantic</code>, there are two warnings, which can be ignored:</p>
<ul>
<li><code>ISO C90 does not support 'long long'</code></li>
@@ -266,8 +265,8 @@ To stifle these complaints:</p>
<h3 id="test-suite">Test Suite:</h3>
<p>If the program name begins with an <code>e</code>, it echoes <code>stdin</code> to <code>stdout</code>.
This allows for a convenient test suite:</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="fu">ln</span> <span class="at">-sf</span> prog eprog</span>
<span id="cb11-2"><a href="#cb11-2" aria-hidden="true" tabindex="-1"></a><span class="va">PATH</span><span class="op">=</span>. <span class="ex">eprog</span> <span class="op">&lt;</span> test.in <span class="kw">|</span> <span class="fu">diff</span> <span class="at">-</span> test.out</span></code></pre></div>
<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="fu">ln</span> <span class="at">-sf</span> prog eprog</span>
<span id="cb11-2"><a href="#cb11-2" aria-hidden="true" tabindex="-1"></a> <span class="va">PATH</span><span class="op">=</span>. <span class="ex">eprog</span> <span class="op">&lt;</span> test.in <span class="kw">|</span> <span class="fu">diff</span> <span class="at">-</span> test.out</span></code></pre></div>
<h3 id="spoilers">Spoilers:</h3>
<p>If you do not want to puzzle out how it works, see <a href="spoilers.html">spoilers.html</a>.</p>
<!--
2015/burton/road.to.obscurity.html
+40 -40
View File
@@ -135,50 +135,50 @@ did the basic four operations, but as a programmer, I needed more, so those
were added over time.</p>
<p><code>calc</code> is a useful, functioning utility. The operators before the obfuscation
dance began (this is called foreshadowing):</p>
<pre><code>() forced precedence
- ~ ? unary minus, compl, byteswap
* / % &amp; &lt;&lt; &gt;&gt; mul, div, mod, bitand, shift: left, right
+ - | ^ add, sub, bitor, xor
NUM 0-9</code></pre>
<pre><code> () forced precedence
- ~ ? unary minus, compl, byteswap
* / % &amp; &lt;&lt; &gt;&gt; mul, div, mod, bitand, shift: left, right
+ - | ^ add, sub, bitor, xor
NUM 0-9</code></pre>
<p>This seemed like a reasonable candidate to experiment with obfuscation; perhaps
it might yield good results.</p>
<h2 id="principle-of-operation">Principle of operation</h2>
<p>The algorithm was and is rather straightforward:</p>
<pre><code>expr() {
n = term()
t = token()
if (t == ADD) return n += expr()
if (t == SUB) return n -= expr()
if (t == BOR) return n |= expr()
if (t == XOR) return n ^= expr()
ungettoken(t)
return n
}
term() {
n = factor()
t = token()
if (t == MUL) return n *= term()
if (t == DIV) return n /= term()
if (t == AND) return n &amp;= term()
if (t == RSH) return n &gt;&gt; term()
if (t == LSH) return n &lt;&lt; term()
ungettoken(t)
return n
}
factor() {
t = token()
if (t == LPAREN) {
n = expr()
if token() == RPAREN
return n
error()
}
if (t == SUB) return -factor()
if (t == CMP) return ~factor()
if (t == QUE) return byteswap(factor())
if (t == DIG) return strtol()
error()
}</code></pre>
<pre><code> expr() {
n = term()
t = token()
if (t == ADD) return n += expr()
if (t == SUB) return n -= expr()
if (t == BOR) return n |= expr()
if (t == XOR) return n ^= expr()
ungettoken(t)
return n
}
term() {
n = factor()
t = token()
if (t == MUL) return n *= term()
if (t == DIV) return n /= term()
if (t == AND) return n &amp;= term()
if (t == RSH) return n &gt;&gt; term()
if (t == LSH) return n &lt;&lt; term()
ungettoken(t)
return n
}
factor() {
t = token()
if (t == LPAREN) {
n = expr()
if token() == RPAREN
return n
error()
}
if (t == SUB) return -factor()
if (t == CMP) return ~factor()
if (t == QUE) return byteswap(factor())
if (t == DIG) return strtol()
error()
}</code></pre>
<h2 id="obfuscation-is-a-process">Obfuscation is a process</h2>
<p>Within the above algorithm, there are many details unmentioned, all ripe for
obfuscation:</p>
2015/burton/road.to.obscurity.md
+40 -40
View File
@@ -17,11 +17,11 @@ were added over time.
dance began (this is called foreshadowing):
```
() forced precedence
- ~ ? unary minus, compl, byteswap
* / % & << >> mul, div, mod, bitand, shift: left, right
+ - | ^ add, sub, bitor, xor
NUM 0-9
() forced precedence
- ~ ? unary minus, compl, byteswap
* / % & << >> mul, div, mod, bitand, shift: left, right
+ - | ^ add, sub, bitor, xor
NUM 0-9
```
This seemed like a reasonable candidate to experiment with obfuscation; perhaps
@@ -33,41 +33,41 @@ it might yield good results.
The algorithm was and is rather straightforward:
```
expr() {
n = term()
t = token()
if (t == ADD) return n += expr()
if (t == SUB) return n -= expr()
if (t == BOR) return n |= expr()
if (t == XOR) return n ^= expr()
ungettoken(t)
return n
}
term() {
n = factor()
t = token()
if (t == MUL) return n *= term()
if (t == DIV) return n /= term()
if (t == AND) return n &= term()
if (t == RSH) return n >> term()
if (t == LSH) return n << term()
ungettoken(t)
return n
}
factor() {
t = token()
if (t == LPAREN) {
n = expr()
if token() == RPAREN
return n
error()
}
if (t == SUB) return -factor()
if (t == CMP) return ~factor()
if (t == QUE) return byteswap(factor())
if (t == DIG) return strtol()
error()
}
expr() {
n = term()
t = token()
if (t == ADD) return n += expr()
if (t == SUB) return n -= expr()
if (t == BOR) return n |= expr()
if (t == XOR) return n ^= expr()
ungettoken(t)
return n
}
term() {
n = factor()
t = token()
if (t == MUL) return n *= term()
if (t == DIV) return n /= term()
if (t == AND) return n &= term()
if (t == RSH) return n >> term()
if (t == LSH) return n << term()
ungettoken(t)
return n
}
factor() {
t = token()
if (t == LPAREN) {
n = expr()
if token() == RPAREN
return n
error()
}
if (t == SUB) return -factor()
if (t == CMP) return ~factor()
if (t == QUE) return byteswap(factor())
if (t == DIG) return strtol()
error()
}
```
## Obfuscation is a process
2015/burton/spoilers.html
+5 -5
View File
@@ -134,11 +134,11 @@ global pointer variable, and the integers from uninitialized global <code>int</c
variables. If <code>x</code> is a global <code>int</code>, then <code>!x</code> is <code>1</code>, and the derivation
proceeds from there, using some identities that are confusingly similar and
interestingly combined (increasing obfuscation):</p>
<pre><code>obc clr
--- ---
-~x x+1
~-x x-1
y-~x y+x+1</code></pre>
<pre><code> obc clr
--- ---
-~x x+1
~-x x-1
y-~x y+x+1</code></pre>
<p>The derived constants are a compromise between simple expressions, maximum utility,
and minimum number of variables used.</p>
<p>Command line arguments are copied into the upper half of the input buffer,
2015/burton/spoilers.md
+5 -5
View File
@@ -14,11 +14,11 @@ proceeds from there, using some identities that are confusingly similar and
interestingly combined (increasing obfuscation):
```
obc clr
--- ---
-~x x+1
~-x x-1
y-~x y+x+1
obc clr
--- ---
-~x x+1
~-x x-1
y-~x y+x+1
```
The derived constants are a compromise between simple expressions, maximum utility,
2015/dogon/README.md
+9 -9
View File
@@ -1,14 +1,14 @@
## To build:
```sh
make
make
```
To change the dimensions you can use the `WIDTH` and `HEIGHT` variables when
compiling (default 1024 x 800):
```sh
make clobber WIDTH=640 HEIGHT=480
make clobber WIDTH=640 HEIGHT=480
```
to make the game 640 x 480. Obviously changing it to non numbers or negative
@@ -23,14 +23,14 @@ code](#alternate-code) below.
## To use:
```sh
./prog
./prog
```
## Try:
```sh
./prog
./prog
```
Press and hold the Left Arrow key until you turn 90-degrees to the left.
@@ -67,9 +67,9 @@ The author suggested that one change `q` to `0x82000820000000` instead of
`0x820008202625a0` to see a bug that they avoided, writing:
```
To see this bug in action change the assignment above
to q=0x82000820000000`, and look towards the negative
direction of the main tunnel.
To see this bug in action change the assignment above
to q=0x82000820000000`, and look towards the negative
direction of the main tunnel.
```
This alt version does this for you.
@@ -78,7 +78,7 @@ This alt version does this for you.
### Alternate build:
```sh
make alt
make alt
```
@@ -175,7 +175,7 @@ size limit, and allows us to use such fun expression for arrow view control as
the following:
```c
*(a&1?&C:&B)-=(.05 -a/2%2*.1)*!(a-1&4092^3920)
*(a&1?&C:&B)-=(.05 -a/2%2*.1)*!(a-1&4092^3920)
```
### Precision issues:
2015/dogon/index.html
+10 -11
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Gil_Dogon">Gil Dogon</a><br>
Location: <a href="../../location.html#IL">IL</a> - <em>State of Israel</em> (<em>Israel</em>)
<br><br></li>
Location: <a href="../../location.html#IL">IL</a> - <em>State of Israel</em> (<em>Israel</em>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,19 +141,19 @@ Location: <a href="../../location.html#IL">IL</a> - <em>State of Israel</em> (<e
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>To change the dimensions you can use the <code>WIDTH</code> and <code>HEIGHT</code> variables when
compiling (default 1024 x 800):</p>
<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="fu">make</span> clobber WIDTH=640 HEIGHT=480</span></code></pre></div>
<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="fu">make</span> clobber WIDTH=640 HEIGHT=480</span></code></pre></div>
<p>to make the game 640 x 480. Obviously changing it to non numbers or negative
numbers or too large numbers will cause problems.</p>
<p>There is an alternate version that is based on the author’s suggestion to change
a value in order to see a bug that they avoided in their entry. See <a href="#alternate-code">Alternate
code</a> below.</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></span></code></pre></div>
<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></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">./prog</span></span></code></pre></div>
<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">./prog</span></span></code></pre></div>
<p>Press and hold the Left Arrow key until you turn 90-degrees to the left.</p>
<p>When you see a long tunnel, press the function key F2.</p>
<p>Use the Up, Down, Left and Right keys to change your path.</p>
@@ -172,12 +171,12 @@ again.</p>
<h2 id="alternate-code">Alternate code:</h2>
<p>The author suggested that one change <code>q</code> to <code>0x82000820000000</code> instead of
<code>0x820008202625a0</code> to see a bug that they avoided, writing:</p>
<pre><code>To see this bug in action change the assignment above
to q=0x82000820000000`, and look towards the negative
direction of the main tunnel.</code></pre>
<pre><code> To see this bug in action change the assignment above
to q=0x82000820000000`, and look towards the negative
direction of the main tunnel.</code></pre>
<p>This alt version does this for you.</p>
<h3 id="alternate-build">Alternate build:</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">make</span> alt</span></code></pre></div>
<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> 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.</p>
<h3 id="alternate-try">Alternate try:</h3>
@@ -247,7 +246,7 @@ important support of up to 32 function keys keyboards without spilling over the
size limit, and allows us to use such fun expression for arrow view control as
the following:</li>
</ul>
<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="op">*(</span>a<span class="op">&amp;</span><span class="dv">1</span><span class="op">?&amp;</span>C<span class="op">:&amp;</span>B<span class="op">)-=(</span><span class="fl">.05</span> <span class="op">-</span>a<span class="op">/</span><span class="dv">2</span><span class="op">%</span><span class="dv">2</span><span class="op">*</span><span class="fl">.1</span><span class="op">)*!(</span>a<span class="op">-</span><span class="dv">1</span><span class="op">&amp;</span><span class="dv">4092</span><span class="op">^</span><span class="dv">3920</span><span class="op">)</span></span></code></pre></div>
<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="op">*(</span>a<span class="op">&amp;</span><span class="dv">1</span><span class="op">?&amp;</span>C<span class="op">:&amp;</span>B<span class="op">)-=(</span><span class="fl">.05</span> <span class="op">-</span>a<span class="op">/</span><span class="dv">2</span><span class="op">%</span><span class="dv">2</span><span class="op">*</span><span class="fl">.1</span><span class="op">)*!(</span>a<span class="op">-</span><span class="dv">1</span><span class="op">&amp;</span><span class="dv">4092</span><span class="op">^</span><span class="dv">3920</span><span class="op">)</span></span></code></pre></div>
<h3 id="precision-issues">Precision issues:</h3>
<p>The entry, on purpose, (see the section about SIMD below) does not use enough
bits of precision, so sometimes the ray will miss the intersection of two voxel
2015/duble/README.md
+17 -17
View File
@@ -1,7 +1,7 @@
## To build:
```sh
make
make
```
There is an alternate version of this entry, discussed in the author's remarks.
@@ -11,14 +11,14 @@ See [Alternate code](#alternate-code) below.
## To use:
```sh
echo Some text | ./prog
echo Some text | ./prog
```
## Try:
```sh
./try.sh
./try.sh
```
As the script says if you want to move to the next command at any point
@@ -35,7 +35,7 @@ author in the '[prog.c](prog.c) vs [prog.alt.c](prog.alt.c)' section of their re
### Alternate build:
```sh
make alt
make alt
```
@@ -85,13 +85,13 @@ been shortened in this file.
If you have `clang`:
```sh
CC=clang make -e
CC=clang make -e
```
Otherwise (gcc):
```sh
make
make
```
(You will get a few warnings in this case.)
@@ -117,21 +117,21 @@ needed in this case).
#### Basic mode:
```sh
$ echo 'I am testing this thing.' | ./prog
[... rendering ...]
$ echo 'I am testing this thing.' | ./prog
[... rendering ...]
$ ./prog < lorem-ipsum.txt
[... rendering ...]
$ ./prog < lorem-ipsum.txt
[... rendering ...]
```
#### Interactive mode:
```sh
$ ./prog
> hello world!!!
[... rendering ...]
>
$ ./prog
> hello world!!!
[... rendering ...]
>
```
@@ -174,7 +174,7 @@ In order to comply with the size rule, I encoded only a part of the visible ASCI
chars:
```
a-z, A-Z, '.' ':' ',' ';' '!' and '?'.
a-z, A-Z, '.' ':' ',' ';' '!' and '?'.
```
Uppercase and lowercase chars are rendered the same. The program also
@@ -207,7 +207,7 @@ simple text documents.
Thus, if you try for example:
```sh
$ ./prog < prog.c
$ ./prog < prog.c
```
You will not get something that looks like C code. (but you can still try, if
@@ -220,7 +220,7 @@ Defining an environment variable called `DRAFT` will enable the 'draft-mode'.
Try for example:
```sh
$ echo 'testing the draft mode' | DRAFT=1 ./prog
$ echo 'testing the draft mode' | DRAFT=1 ./prog
```
The program will run much faster but the rendering will be less precise.
2015/duble/index.html
+18 -19
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Etienne_Duble">Etienne Duble</a><br>
Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<em>France</em>)
<br><br></li>
Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<em>France</em>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,13 +141,13 @@ Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<e
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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 of this entry, discussed in the author’s remarks.
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="bu">echo</span> Some text <span class="kw">|</span> <span class="ex">./prog</span></span></code></pre></div>
<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="bu">echo</span> Some text <span class="kw">|</span> <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>
<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>As the script says if you want to move to the next command at any point
(lorem-ipsum.txt takes a while to print in particular) you may do so by hitting
ctrl-c/sending intr.</p>
@@ -156,7 +155,7 @@ ctrl-c/sending intr.</p>
<p>This alternate code, provided by the author, is discussed in more detail by the
author in the ‘<a href="prog.c">prog.c</a> vs <a href="prog.alt.c">prog.alt.c</a>’ section of their remarks.</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>
<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>
<h3 id="alternate-use">Alternate use:</h3>
<p>Use <code>prog.alt</code> as you would <code>prog</code> above.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
@@ -182,9 +181,9 @@ with other compilers or optimization levels). These have been fixed in
been shortened in this file.</p>
<h3 id="how-to-build">How to build</h3>
<p>If you have <code>clang</code>:</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="va">CC</span><span class="op">=</span>clang <span class="fu">make</span> <span class="at">-e</span></span></code></pre></div>
<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="va">CC</span><span class="op">=</span>clang <span class="fu">make</span> <span class="at">-e</span></span></code></pre></div>
<p>Otherwise (gcc):</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></span></code></pre></div>
<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></span></code></pre></div>
<p>(You will get a few warnings in this case.)</p>
<h3 id="how-to-use-it">How to use it</h3>
<p>You need a terminal configured to handle a <em>UTF-8</em> encoding and a font including
@@ -197,16 +196,16 @@ configuration was needed.</p>
<p>I also tested it on FreeBSD 9.3 32bits (font and encoding configuration was
needed in this case).</p>
<h4 id="basic-mode">Basic mode:</h4>
<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="ex">$</span> echo <span class="st">&#39;I am testing this thing.&#39;</span> <span class="kw">|</span> <span class="ex">./prog</span></span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a><span class="ex">[...</span> rendering ...]</span>
<div class="sourceCode" id="cb7"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> echo <span class="st">&#39;I am testing this thing.&#39;</span> <span class="kw">|</span> <span class="ex">./prog</span></span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">[...</span> rendering ...]</span>
<span id="cb7-3"><a href="#cb7-3" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-4"><a href="#cb7-4" aria-hidden="true" tabindex="-1"></a><span class="ex">$</span> ./prog <span class="op">&lt;</span> lorem-ipsum.txt</span>
<span id="cb7-5"><a href="#cb7-5" aria-hidden="true" tabindex="-1"></a><span class="ex">[...</span> rendering ...]</span></code></pre></div>
<span id="cb7-4"><a href="#cb7-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> ./prog <span class="op">&lt;</span> lorem-ipsum.txt</span>
<span id="cb7-5"><a href="#cb7-5" aria-hidden="true" tabindex="-1"></a> <span class="ex">[...</span> rendering ...]</span></code></pre></div>
<h4 id="interactive-mode">Interactive mode:</h4>
<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">$</span> ./prog</span>
<span id="cb8-2"><a href="#cb8-2" aria-hidden="true" tabindex="-1"></a><span class="op">&gt;</span> hello <span class="ex">world!!!</span></span>
<span id="cb8-3"><a href="#cb8-3" aria-hidden="true" tabindex="-1"></a><span class="ex">[...</span> rendering ...]</span>
<span id="cb8-4"><a href="#cb8-4" aria-hidden="true" tabindex="-1"></a><span class="op">&gt;</span></span></code></pre></div>
<div class="sourceCode" id="cb8"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> ./prog</span>
<span id="cb8-2"><a href="#cb8-2" aria-hidden="true" tabindex="-1"></a> <span class="op">&gt;</span> hello <span class="ex">world!!!</span></span>
<span id="cb8-3"><a href="#cb8-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">[...</span> rendering ...]</span>
<span id="cb8-4"><a href="#cb8-4" aria-hidden="true" tabindex="-1"></a> <span class="op">&gt;</span></span></code></pre></div>
<h3 id="obfuscation">Obfuscation:</h3>
<p>This entry is obfuscated in various ways:</p>
<ul>
@@ -239,7 +238,7 @@ encoded in macro <code>O_o</code> at the top of the source file.</li>
<h4 id="charset">Charset</h4>
<p>In order to comply with the size rule, I encoded only a part of the visible ASCII
chars:</p>
<pre><code>a-z, A-Z, &#39;.&#39; &#39;:&#39; &#39;,&#39; &#39;;&#39; &#39;!&#39; and &#39;?&#39;.</code></pre>
<pre><code> a-z, A-Z, &#39;.&#39; &#39;:&#39; &#39;,&#39; &#39;;&#39; &#39;!&#39; and &#39;?&#39;.</code></pre>
<p>Uppercase and lowercase chars are rendered the same. The program also
understands space and linefeed (<code>\n</code>). Other chars are simply ignored (most of
the time ;)</p>
@@ -256,13 +255,13 @@ could still happen in case of long words.</p>
<p>Given the limited set of characters handled, the program is mostly limited to
simple text documents.</p>
<p>Thus, if you try for example:</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">$</span> ./prog <span class="op">&lt;</span> prog.c</span></code></pre></div>
<div class="sourceCode" id="cb10"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> ./prog <span class="op">&lt;</span> prog.c</span></code></pre></div>
<p>You will not get something that looks like C code. (but you can still try, if
you are curious. :)</p>
<h4 id="a-draft-mode">A ‘draft’ mode</h4>
<p>Defining an environment variable called <code>DRAFT</code> will enable the ‘draft-mode’.
Try for example:</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">$</span> echo <span class="st">&#39;testing the draft mode&#39;</span> <span class="kw">|</span> <span class="va">DRAFT</span><span class="op">=</span>1 <span class="ex">./prog</span></span></code></pre></div>
<div class="sourceCode" id="cb11"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> echo <span class="st">&#39;testing the draft mode&#39;</span> <span class="kw">|</span> <span class="va">DRAFT</span><span class="op">=</span>1 <span class="ex">./prog</span></span></code></pre></div>
<p>The program will run much faster but the rendering will be less precise.</p>
<h4 id="the-subtle-interactive-mode">The subtle interactive mode</h4>
<p>I saved the best for last: usually, programs that handle an “interactive mode”
2015/endoh1/README.md
+26 -26
View File
@@ -1,7 +1,7 @@
## To build:
```sh
make
make
```
NOTE: this program requires the tool `tcpserver` to use. If you do not have this
@@ -12,7 +12,7 @@ require it](../../faq.html#tcpserver).
## To use:
```sh
tcpserver -v 127.0.0.1 10333 ./prog ioccc.txt
tcpserver -v 127.0.0.1 10333 ./prog ioccc.txt
```
Then connect to http://localhost:10333 with your browser.
@@ -45,13 +45,13 @@ his work.
Compile the program as follows:
```sh
cc -O3 -std=c99 \
-Wall -Wextra -pedantic -o prog prog.c \
-Delta_u="Du*laplacian(u)-u*v*v+F*(1-u)" \
-Delta_v="Dv*laplacian(v)+u*v*v-v*(F+K)" \
-DF=0.040 -DK=0.060 -DDu=0.200 -DDv=0.100 \
-DUV_BACKGROUND=1,0 -DUV_DROP=-0.5,0.5 \
-DTIMESTEP=1.0 -DSPEED=2 -DRGB=255:128:192
cc -O3 -std=c99 \
-Wall -Wextra -pedantic -o prog prog.c \
-Delta_u="Du*laplacian(u)-u*v*v+F*(1-u)" \
-Delta_v="Dv*laplacian(v)+u*v*v-v*(F+K)" \
-DF=0.040 -DK=0.060 -DDu=0.200 -DDv=0.100 \
-DUV_BACKGROUND=1,0 -DUV_DROP=-0.5,0.5 \
-DTIMESTEP=1.0 -DSPEED=2 -DRGB=255:128:192
```
Then, run it with the `tcpserver` command in the
@@ -60,7 +60,7 @@ Then, run it with the `tcpserver` command in the
[1991/brndstd](../../1991/brnstnd/index.html) "Best of Show".
```sh
tcpserver -v 127.0.0.1 10333 ./prog ioccc.txt
tcpserver -v 127.0.0.1 10333 ./prog ioccc.txt
```
Finally, open `http://127.0.0.1:10333/` in a modern browser supporting HTML5.
@@ -81,8 +81,8 @@ form non-trivial patterns, such as spots, spiral, dappling, and labyrinths.
The systems are generally formulated as follows:
```
du/dt = F(u, v) + Du * laplacian(u)
dv/dt = G(u, v) + Dv * laplacian(v)
du/dt = F(u, v) + Du * laplacian(u)
dv/dt = G(u, v) + Dv * laplacian(v)
```
The functions `F(u, v)` and `G(u, v)` represent reactions of each substance, and
@@ -113,15 +113,15 @@ model](http://groups.csail.mit.edu/mac/projects/amorphous/GrayScott/) in TeX
notation.
```
\frac{\partial u}{\partial t} = D_u \Delta u - u v^2 + F (1 - u)
\frac{\partial v}{\partial t} = D_v \Delta v + u v^2 - v (F + K)
\frac{\partial u}{\partial t} = D_u \Delta u - u v^2 + F (1 - u)
\frac{\partial v}{\partial t} = D_v \Delta v + u v^2 - v (F + K)
```
You can specify this model as follows:
```
-Delta_u="Du*laplacian(u)-u*v*v+F*(1-u)" \
-Delta_v="Dv*laplacian(v)+u*v*v-v*(F+K)"
-Delta_u="Du*laplacian(u)-u*v*v+F*(1-u)" \
-Delta_v="Dv*laplacian(v)+u*v*v-v*(F+K)"
```
`Du`, `Dv`, `F`, and `K` are parameters of that model.
@@ -159,15 +159,15 @@ Some interesting parameters are included in `Makefile`. Do one of the following
commands and open `http://127.0.0.1:10333`.
```
make gray-scott-1 && tcpserver -v 127.0.0.1 10333 ./gray-scott-1 ioccc.txt
make gray-scott-1 && tcpserver -v 127.0.0.1 10333 ./gray-scott-1 center.txt
make gray-scott-1 && tcpserver -v 127.0.0.1 10333 ./gray-scott-1 line.txt
make gray-scott-2 && tcpserver -v 127.0.0.1 10333 ./gray-scott-2 ioccc.txt
make gray-scott-3 && tcpserver -v 127.0.0.1 10333 ./gray-scott-3 ioccc.txt
make gray-scott-4 && tcpserver -v 127.0.0.1 10333 ./gray-scott-4 ioccc.txt
make fitzhugh-nagumo-1 && tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-1 ioccc.txt
make fitzhugh-nagumo-2 && tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-2 ioccc.txt
make oregonator && tcpserver -v 127.0.0.1 10333 ./oregonator ioccc.txt
make gray-scott-1 && tcpserver -v 127.0.0.1 10333 ./gray-scott-1 ioccc.txt
make gray-scott-1 && tcpserver -v 127.0.0.1 10333 ./gray-scott-1 center.txt
make gray-scott-1 && tcpserver -v 127.0.0.1 10333 ./gray-scott-1 line.txt
make gray-scott-2 && tcpserver -v 127.0.0.1 10333 ./gray-scott-2 ioccc.txt
make gray-scott-3 && tcpserver -v 127.0.0.1 10333 ./gray-scott-3 ioccc.txt
make gray-scott-4 && tcpserver -v 127.0.0.1 10333 ./gray-scott-4 ioccc.txt
make fitzhugh-nagumo-1 && tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-1 ioccc.txt
make fitzhugh-nagumo-2 && tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-2 ioccc.txt
make oregonator && tcpserver -v 127.0.0.1 10333 ./oregonator ioccc.txt
```
These examples are created by drawing (and modifying) the pattern files of
@@ -204,7 +204,7 @@ I think you may use `inetd` and `xinetd` instead of `tcpserver`. Here is an
example `inetd` configuration.
```
10333 stream tcp nowait nobody /path/to/prog /path/to/prog /path/to/initial-pattern.txt
10333 stream tcp nowait nobody /path/to/prog /path/to/prog /path/to/initial-pattern.txt
```
But note that I didn't test well.
2015/endoh1/index.html
+27 -28
View File
@@ -135,8 +135,7 @@
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<br><br></li>
<li>Name: <a href="../../authors.html#Yusuke_Endoh">Yusuke Endoh</a><br>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<br><br></li>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -145,12 +144,12 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>NOTE: this program requires the tool <code>tcpserver</code> to use. If you do not have this
program see <a href="../../faq.html#tcpserver">FAQ 3.14 - How do I compile and install tcpserver for entries that
require it</a>.</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">tcpserver</span> <span class="at">-v</span> 127.0.0.1 10333 ./prog ioccc.txt</span></code></pre></div>
<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">tcpserver</span> <span class="at">-v</span> 127.0.0.1 10333 ./prog ioccc.txt</span></code></pre></div>
<p>Then connect to http://localhost:10333 with your browser.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p><a href="https://www.livescience.com/950-leopard-spots.html">How did the leopard get its
@@ -169,18 +168,18 @@ test</a>? This program is also based on
his work.</p>
<h3 id="whirlwind-tour">Whirlwind tour</h3>
<p>Compile the program as follows:</p>
<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="fu">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c99 <span class="dt">\</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a> <span class="at">-Wall</span> <span class="at">-Wextra</span> <span class="at">-pedantic</span> <span class="at">-o</span> prog prog.c <span class="dt">\</span></span>
<span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a> <span class="at">-Delta_u</span><span class="op">=</span><span class="st">&quot;Du*laplacian(u)-u*v*v+F*(1-u)&quot;</span> <span class="dt">\</span></span>
<span id="cb3-4"><a href="#cb3-4" aria-hidden="true" tabindex="-1"></a> <span class="at">-Delta_v</span><span class="op">=</span><span class="st">&quot;Dv*laplacian(v)+u*v*v-v*(F+K)&quot;</span> <span class="dt">\</span></span>
<span id="cb3-5"><a href="#cb3-5" aria-hidden="true" tabindex="-1"></a> <span class="at">-DF</span><span class="op">=</span>0.040 <span class="at">-DK</span><span class="op">=</span>0.060 <span class="at">-DDu</span><span class="op">=</span>0.200 <span class="at">-DDv</span><span class="op">=</span>0.100 <span class="dt">\</span></span>
<span id="cb3-6"><a href="#cb3-6" aria-hidden="true" tabindex="-1"></a> <span class="at">-DUV_BACKGROUND</span><span class="op">=</span>1,0 <span class="at">-DUV_DROP</span><span class="op">=</span>-0.5,0.5 <span class="dt">\</span></span>
<span id="cb3-7"><a href="#cb3-7" aria-hidden="true" tabindex="-1"></a> <span class="at">-DTIMESTEP</span><span class="op">=</span>1.0 <span class="at">-DSPEED</span><span class="op">=</span>2 <span class="at">-DRGB</span><span class="op">=</span>255:128:192</span></code></pre></div>
<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">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c99 <span class="dt">\</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a> <span class="at">-Wall</span> <span class="at">-Wextra</span> <span class="at">-pedantic</span> <span class="at">-o</span> prog prog.c <span class="dt">\</span></span>
<span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a> <span class="at">-Delta_u</span><span class="op">=</span><span class="st">&quot;Du*laplacian(u)-u*v*v+F*(1-u)&quot;</span> <span class="dt">\</span></span>
<span id="cb3-4"><a href="#cb3-4" aria-hidden="true" tabindex="-1"></a> <span class="at">-Delta_v</span><span class="op">=</span><span class="st">&quot;Dv*laplacian(v)+u*v*v-v*(F+K)&quot;</span> <span class="dt">\</span></span>
<span id="cb3-5"><a href="#cb3-5" aria-hidden="true" tabindex="-1"></a> <span class="at">-DF</span><span class="op">=</span>0.040 <span class="at">-DK</span><span class="op">=</span>0.060 <span class="at">-DDu</span><span class="op">=</span>0.200 <span class="at">-DDv</span><span class="op">=</span>0.100 <span class="dt">\</span></span>
<span id="cb3-6"><a href="#cb3-6" aria-hidden="true" tabindex="-1"></a> <span class="at">-DUV_BACKGROUND</span><span class="op">=</span>1,0 <span class="at">-DUV_DROP</span><span class="op">=</span>-0.5,0.5 <span class="dt">\</span></span>
<span id="cb3-7"><a href="#cb3-7" aria-hidden="true" tabindex="-1"></a> <span class="at">-DTIMESTEP</span><span class="op">=</span>1.0 <span class="at">-DSPEED</span><span class="op">=</span>2 <span class="at">-DRGB</span><span class="op">=</span>255:128:192</span></code></pre></div>
<p>Then, run it with the <code>tcpserver</code> command in the
<a href="http://cr.yp.to/ucspi-tcp.html">ucspi-tcp</a> package, which was created by
<a href="../../authors.html#Daniel_J_Bernstein">Daniel J. Bernstein</a>’s
<a href="../../1991/brnstnd/index.html">1991/brndstd</a> “Best of Show”.</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">tcpserver</span> <span class="at">-v</span> 127.0.0.1 10333 ./prog ioccc.txt</span></code></pre></div>
<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">tcpserver</span> <span class="at">-v</span> 127.0.0.1 10333 ./prog ioccc.txt</span></code></pre></div>
<p>Finally, open <code>http://127.0.0.1:10333/</code> in a modern browser supporting HTML5.
You can use the mouse cursor to place drops into the <a href="https://en.wikipedia.org/wiki/Petri_dish">Petri
dish</a> interactively.</p>
@@ -192,8 +191,8 @@ models in which two chemical substances are transformed into each other (<em>loc
chemical reactions</em>) and spread out (<em>diffusion</em>). Their interactions sometimes
form non-trivial patterns, such as spots, spiral, dappling, and labyrinths.</p>
<p>The systems are generally formulated as follows:</p>
<pre><code>du/dt = F(u, v) + Du * laplacian(u)
dv/dt = G(u, v) + Dv * laplacian(v)</code></pre>
<pre><code> du/dt = F(u, v) + Du * laplacian(u)
dv/dt = G(u, v) + Dv * laplacian(v)</code></pre>
<p>The functions <code>F(u, v)</code> and <code>G(u, v)</code> represent reactions of each substance, and
the parameters <code>Du</code> and <code>Dv</code> are diffusion coefficients. By changing the
functions and parameters, you can see a wide range of behaviors.</p>
@@ -212,11 +211,11 @@ definition.</p>
example, the following is <a href="http://groups.csail.mit.edu/mac/projects/amorphous/GrayScott/">the Gray-Scott
model</a> in TeX
notation.</p>
<pre><code>\frac{\partial u}{\partial t} = D_u \Delta u - u v^2 + F (1 - u)
\frac{\partial v}{\partial t} = D_v \Delta v + u v^2 - v (F + K)</code></pre>
<pre><code> \frac{\partial u}{\partial t} = D_u \Delta u - u v^2 + F (1 - u)
\frac{\partial v}{\partial t} = D_v \Delta v + u v^2 - v (F + K)</code></pre>
<p>You can specify this model as follows:</p>
<pre><code>-Delta_u=&quot;Du*laplacian(u)-u*v*v+F*(1-u)&quot; \
-Delta_v=&quot;Dv*laplacian(v)+u*v*v-v*(F+K)&quot;</code></pre>
<pre><code> -Delta_u=&quot;Du*laplacian(u)-u*v*v+F*(1-u)&quot; \
-Delta_v=&quot;Dv*laplacian(v)+u*v*v-v*(F+K)&quot;</code></pre>
<p><code>Du</code>, <code>Dv</code>, <code>F</code>, and <code>K</code> are parameters of that model.</p>
<h4 id="initial-pattern--duv_backgroundu0v0--duv_dropu1v1">Initial pattern: <code>-DUV_BACKGROUND=&lt;u0&gt;,&lt;v0&gt; -DUV_DROP=&lt;u1&gt;,&lt;v1&gt;</code></h4>
<p>The definitions specifies the initial amount of the two substances <code>u</code> and <code>v</code>.
@@ -235,15 +234,15 @@ added by <code>(u1, v1)</code>.</p>
<h3 id="examples">Examples</h3>
<p>Some interesting parameters are included in <code>Makefile</code>. Do one of the following
commands and open <code>http://127.0.0.1:10333</code>.</p>
<pre><code>make gray-scott-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-1 ioccc.txt
make gray-scott-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-1 center.txt
make gray-scott-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-1 line.txt
make gray-scott-2 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-2 ioccc.txt
make gray-scott-3 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-3 ioccc.txt
make gray-scott-4 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-4 ioccc.txt
make fitzhugh-nagumo-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-1 ioccc.txt
make fitzhugh-nagumo-2 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-2 ioccc.txt
make oregonator &amp;&amp; tcpserver -v 127.0.0.1 10333 ./oregonator ioccc.txt</code></pre>
<pre><code> make gray-scott-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-1 ioccc.txt
make gray-scott-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-1 center.txt
make gray-scott-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-1 line.txt
make gray-scott-2 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-2 ioccc.txt
make gray-scott-3 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-3 ioccc.txt
make gray-scott-4 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./gray-scott-4 ioccc.txt
make fitzhugh-nagumo-1 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-1 ioccc.txt
make fitzhugh-nagumo-2 &amp;&amp; tcpserver -v 127.0.0.1 10333 ./fitzhugh-nagumo-2 ioccc.txt
make oregonator &amp;&amp; tcpserver -v 127.0.0.1 10333 ./oregonator ioccc.txt</code></pre>
<p>These examples are created by drawing (and modifying) the pattern files of
<a href="https://github.com/GollyGang/ready">Ready</a>, a cross-platform implementation of
various reaction-diffusion systems <a href="#fn2" class="footnote-ref" id="fnref2" role="doc-noteref"><sup>2</sup></a>.</p>
@@ -263,7 +262,7 @@ WebSocket <a href="#fn3" class="footnote-ref" id="fnref3" role="doc-noteref"><su
<h4 id="tcpserver-alternatives">tcpserver alternatives</h4>
<p>I think you may use <code>inetd</code> and <code>xinetd</code> instead of <code>tcpserver</code>. Here is an
example <code>inetd</code> configuration.</p>
<pre><code>10333 stream tcp nowait nobody /path/to/prog /path/to/prog /path/to/initial-pattern.txt</code></pre>
<pre><code> 10333 stream tcp nowait nobody /path/to/prog /path/to/prog /path/to/initial-pattern.txt</code></pre>
<p>But note that I didn’t test well.</p>
<h3 id="internal">Internal</h3>
<ol type="1">
2015/endoh2/README.md
+8 -8
View File
@@ -1,21 +1,21 @@
## To build:
```sh
make
make
```
## To use:
```sh
./prog
./prog
```
## Try:
```sh
./try.sh
./try.sh
```
@@ -32,9 +32,9 @@ At this point you might be wondering, [WTF](http://acronyms.thefreedictionary.co
How is this code obfuscated? Well look again:
```sh
less prog.c
less prog.c
more prog.c
more prog.c
```
Where did those underscores come from? Well [RTFS](http://acronyms.thefreedictionary.com/RTFS)!\*\*
@@ -50,9 +50,9 @@ If you are still puzzled, look at [prog.c](prog.c) with your favorite text edito
**Follow these instructions literally!**
```sh
cat prog.c
gcc -w -o prog prog.c
./prog
cat prog.c
gcc -w -o prog prog.c
./prog
```
You will do a double take.
2015/endoh2/index.html
+9 -10
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Yusuke_Endoh">Yusuke Endoh</a><br>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<br><br></li>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,11 +141,11 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>
<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>
<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>At this point you might be wondering, <a href="http://acronyms.thefreedictionary.com/WTF">WTF</a>?*</p>
<ul>
@@ -155,18 +154,18 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<li><p>What the Fish (python form)</p></li>
</ul>
<p>How is this code obfuscated? Well look again:</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">less</span> prog.c</span>
<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">less</span> prog.c</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="fu">more</span> prog.c</span></code></pre></div>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a> <span class="fu">more</span> prog.c</span></code></pre></div>
<p>Where did those underscores come from? Well <a href="http://acronyms.thefreedictionary.com/RTFS">RTFS</a>!**</p>
<p>** Read the Freaking Source (polite form)
** Read The Freaking Screen (polite form)</p>
<p>If you are still puzzled, look at <a href="prog.c">prog.c</a> with your favorite text editor.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p><strong>Follow these instructions literally!</strong></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">cat</span> prog.c</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="fu">gcc</span> <span class="at">-w</span> <span class="at">-o</span> prog prog.c</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span></code></pre></div>
<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">cat</span> prog.c</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a> <span class="fu">gcc</span> <span class="at">-w</span> <span class="at">-o</span> prog prog.c</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span></span></code></pre></div>
<p>You will do a double take.</p>
<p>Hint 1: Do <code>less prog.c</code>. You will see an <strong>emphasized</strong> string if your
terminal supports bold.</p>
2015/endoh3/README.md
+122 -122
View File
@@ -1,14 +1,14 @@
## To build:
```sh
make
make
```
## To use:
```sh
./prog
./prog
```
@@ -17,7 +17,7 @@ make
To see the original [mullender](mullender.c) in action:
```sh
./try.sh
./try.sh
```
Observe what happens when you hit enter or another character! You might even try
@@ -27,9 +27,9 @@ like at the end. Send INTR to end the program.
More generally use:
```sh
cc -o prog prog.c foo.c
./prog
^C # if necessary, where ^C is ctrl-C, interrrupt
cc -o prog prog.c foo.c
./prog
^C # if necessary, where ^C is ctrl-C, interrrupt
```
to compile and run `prog` as whatever foo.c is in the joke PDP-11 emulator.
@@ -72,9 +72,9 @@ Read it upside down.)
You got it? This program is supposed to be used in this way:
```sh
wget https://www.ioccc.org/1984/mullender.c
clang -o prog prog.c mullender.c
./prog
wget https://www.ioccc.org/1984/mullender.c
clang -o prog prog.c mullender.c
./prog
```
You can enjoy the legendary winning entry of the first IOCCC, again.
@@ -118,119 +118,119 @@ register).
Note: this program writes a binary file to `stdout`:
```
short main[]={5568,1,-30460,12,2782,0,-29921,2056,-4864,6873,770,30054,11886,
24948,114,21716,-28851,14043,-8944,32691,-16187,-12247,22692,-9781,-20403,
-11771,16546,18710,17873,9233,31304,-32215,-24382,-28247,-25916,10466,24988,
-3404,-4177,-28528,-531,-3016,17300,-28552,-7708,-26180,-4297,-367,-2312,
-25611,28535,-8533,24004,25421,-1224,-5354,-20807,-21589,-6761,-5203,-1055,
-6715,-26673,-1433,-17732,-24198,14681,-3714,-6660,-14891,-25575,20349,-7701,
-8336,31433,16695,-14773,26819,3096,-12584,-28808,17825,-21200,-32399,15877,
-28890,-3728,-27126,21375,-32630,-7615,32004,-29230,-6611,-5508,-28921,12418,
27204,-5725,9643,3520,26836,-29347,2101,-29311,9320,29287,-29990,-6593,29825,
-29114,16232,25641,20672,-23501,-32127,-6546,-956,10474,-29647,1070,5516,13760,
-27814,-32488,-28006,-17968,-3146,10963,19234,22132,23988,7142,5523,9639,-6888,
-11428,7964,23099,-16822,16518,31109,-12958,10351,2434,3091,3625,2244,27512,
-28559,-10724,-19377,23625,30056,11478,-21176,27660,26517,-29037,-9390,12297,
-11903,5980,-21927,-7483,6671,11249,29638,-23827,-26358,-6856,-1063,-5303,
26636,25797,31818,26798,-4243,-18772,-13266,27472,-12005,-10642,-22524,24373,
-13111,-9062,6274,-20002,24150,22189,-14965,-31249,-13934,-6341,-18384,-32054,
-29246,10622,-9260,19428,-15485,2724,23810,16447,11627,18604,2739,27812,30295,
-21538,-31786,11355,-11308,-9006,-4987,25363,-18927,-21130,-31213,-27411,17231,
-19608,20232,27754,16476,11213,-19803,-24048,30918,-25329,21233,-10160,13519,
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```
<!--
2015/endoh3/index.html
+123 -124
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Yusuke_Endoh">Yusuke Endoh</a><br>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<br><br></li>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,19 +141,19 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>
<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>
<p>To see the original <a href="mullender.c">mullender</a> in action:</p>
<div class="sourceCode" id="cb3"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./try.sh</span></span></code></pre></div>
<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>Observe what happens when you hit enter or another character! You might even try
typing out, one character at a time, <code>1984/mullender</code>, and then see what it looks
like at the end. Send INTR to end the program.</p>
<p>More generally use:</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">cc</span> <span class="at">-o</span> prog prog.c foo.c</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a><span class="ex">^C</span> <span class="co"># if necessary, where ^C is ctrl-C, interrrupt</span></span></code></pre></div>
<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">cc</span> <span class="at">-o</span> prog prog.c foo.c</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span></span>
<span id="cb4-3"><a href="#cb4-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">^C</span> <span class="co"># if necessary, where ^C is ctrl-C, interrrupt</span></span></code></pre></div>
<p>to compile and run <code>prog</code> as whatever foo.c is in the joke PDP-11 emulator.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>Like <a href="https://en.wikipedia.org/wiki/Marty_McFly">Marty</a> and
@@ -182,9 +181,9 @@ the source code from all angles..</li>
<p>This program is a joke PDP-11 emulator. (“ll-dpd” is embedded in the code.
Read it upside down.)</p>
<p>You got it? This program is supposed to be used in this way:</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">wget</span> https://www.ioccc.org/1984/mullender.c</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="fu">clang</span> <span class="at">-o</span> prog prog.c mullender.c</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span></code></pre></div>
<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">wget</span> https://www.ioccc.org/1984/mullender.c</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a> <span class="fu">clang</span> <span class="at">-o</span> prog prog.c mullender.c</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span></span></code></pre></div>
<p>You can enjoy the legendary winning entry of the first IOCCC, again.</p>
<h3 id="internal">Internal</h3>
<p>This program uses <code>__attribute__((constructor))</code>, which is a GCC extension, to
@@ -218,119 +217,119 @@ destination register. Index addressing mode works well only for R7 (PC
register).</p>
<h3 id="one-more-thing">One more thing</h3>
<p>Note: this program writes a binary file to <code>stdout</code>:</p>
<pre><code>short main[]={5568,1,-30460,12,2782,0,-29921,2056,-4864,6873,770,30054,11886,
24948,114,21716,-28851,14043,-8944,32691,-16187,-12247,22692,-9781,-20403,
-11771,16546,18710,17873,9233,31304,-32215,-24382,-28247,-25916,10466,24988,
-3404,-4177,-28528,-531,-3016,17300,-28552,-7708,-26180,-4297,-367,-2312,
-25611,28535,-8533,24004,25421,-1224,-5354,-20807,-21589,-6761,-5203,-1055,
-6715,-26673,-1433,-17732,-24198,14681,-3714,-6660,-14891,-25575,20349,-7701,
-8336,31433,16695,-14773,26819,3096,-12584,-28808,17825,-21200,-32399,15877,
-28890,-3728,-27126,21375,-32630,-7615,32004,-29230,-6611,-5508,-28921,12418,
27204,-5725,9643,3520,26836,-29347,2101,-29311,9320,29287,-29990,-6593,29825,
-29114,16232,25641,20672,-23501,-32127,-6546,-956,10474,-29647,1070,5516,13760,
-27814,-32488,-28006,-17968,-3146,10963,19234,22132,23988,7142,5523,9639,-6888,
-11428,7964,23099,-16822,16518,31109,-12958,10351,2434,3091,3625,2244,27512,
-28559,-10724,-19377,23625,30056,11478,-21176,27660,26517,-29037,-9390,12297,
-11903,5980,-21927,-7483,6671,11249,29638,-23827,-26358,-6856,-1063,-5303,
26636,25797,31818,26798,-4243,-18772,-13266,27472,-12005,-10642,-22524,24373,
-13111,-9062,6274,-20002,24150,22189,-14965,-31249,-13934,-6341,-18384,-32054,
-29246,10622,-9260,19428,-15485,2724,23810,16447,11627,18604,2739,27812,30295,
-21538,-31786,11355,-11308,-9006,-4987,25363,-18927,-21130,-31213,-27411,17231,
-19608,20232,27754,16476,11213,-19803,-24048,30918,-25329,21233,-10160,13519,
11828,26653,-6703,10893,6871,-12417,24471,20310,-12137,-19677,4457,-19530,
10147,17724,533,-10055,27076,10264,11274,-10511,4809,25208,16065,-5105,-19953,
3772,-12124,13475,-27559,-9955,26446,15133,15207,-23640,6425,-11010,28688,
-20064,26353,-889,-25008,10380,-14449,-6894,18920,-23900,16902,-31018,16093,
20875,-19576,4585,13126,18589,24789,19424,31274,-5059,-14538,-3125,-16527,
-25070,-9013,26628,15756,-7652,30841,-1283,17707,25717,-18315,-6342,6880,
-19176,6995,5672,2853,-9044,-3409,-14421,-7522,13108,20582,-25317,1376,-5648,
13821,17300,1220,-29437,-25832,-8332,-15575,-9744,28297,31995,-1217,23852,
14382,31059,9160,-3296,20287,-28357,24449,-10323,-21992,-4655,-32548,13237,
-15083,-25226,-21121,2015,-8996,-20247,-27551,-14771,-16089,-6920,-9645,21578,
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-22186,-6716,18416,1698,-26200,-16231,9821,-10886,-4994,-30527,-9448,-16923,
29549,-11207,-14909,-3643,-27548,17865,28859,29753,17616,16874,-17733,9424,
21435,-31715,24544,8666,30844,25075,-18267,12027,-5346,2717,19615,-4548,-21763,
28514,11691,22268,-2338,1406,-27379,-23568,-24525,13633,11295,-14715,7877,
-27669,3475,20345,7779,-17849,2184,7132,4079,-24937,11585,22740,5810,-10855,
16203,-6371,23235,-7,-24828,-11205,-11006,-10,-17812,-14274,11504,-27517,463,
4498,-32180,-9775,-3190,-22435,-18662,-30146,-31834,-26449,-19374,-12616,
-10596,14341,-10089,-18449,-16535,21439,21191,-1651,7695,-30009,-23339,-8675,
-20774,21588,-2793,8218,-14337,-10866,14060,-15343,31712,25247,-8539,18074,
-28683,-7363,-7663,-3563,-30718,17771,28687,-30495,30584,14022,-28053,5292,
-31576,-32486,-15470,-1330,23551,-2185,-10829,-13216,-4825,-2964,-14668,24559,
-4930,23731,-1152,-11493,-2321,15987,-27073,-20305,-24065,-25048,32750,-27440,
-1169,-25633,-4356,-24993,30439,-17165,-4580,8662,22655,-4588,-6162,-3122,
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-15903,-1930,-28488,31222,31153,17607,-2758,7594,-8868,30434,-2518,27956,
-19424,7370,6199,-17602,17347,-14358,25588,11611,-25209,-23701,-27444,-29788,
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-11696,-31623,-15149,13357,28938,-14048,19490,-19860,-26050,10842,-24922,
-20986,8847,-31184,28519,-29168,32195,10516,25713,-3493,670,31283,-12769,
-17461,11357,13180,26133,15944,18051,-32167,-27990,16813,17676,21787,-17578,
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-14654,-29990,-10707,-12440,21465,5822,26164,-1404,-14303,-26635,-6900,-23611,
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-526,-35,28218,-3214,11965,11263,6633,30719,32400,-29,-3733,24383,32678,-27542,
-4444,6196,5975,-19722,11902,16840,-11680,11146,-26391,-8980,21573,-9043,2349,
-12887,5916,-2996,10410,-23374,26338,11867,-14518,18281,14450,-5815,13842,359,
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-15664,-29001,3365,-12689,10233,23608,24692,12039,15445,18411,-27469,3764,
-10841,22672,23844,2282,-12443,2851,-27163,13651,13738,17201,-29819,27414,
-29764,-5308,-16171,-32427,-26312,-7460,-27376,-6004,25717,29254,-15015,8754,
15493,22232,-28513,-23355,23676,7736,10571,-8120,-16677,7696,32549,-2646,25538,
3498,30960,-28459,24716,12655,-10496,402,26209,482,-16661,-20350,-3403,14015,
32299,11262,-25886,4092,-7843,-100,-1975,-58,-3729,-19269,-23583,-6929,20000,
-6089,17780,-3250,29830,19954,-29277,27896,10330,9277,-25358,31279,-14454,
24203,-30170,12872,-21973,-25773,-10502,-6647,-26143,6394,-13479,-24559,23007,
-21844,1505,24702,-23187,-24364,-20470,20765,-7107,15674,9404,17408,17964,
19820,18952,2154,-26052,30056,-3227,17770,-8557,-31018,-27700,-25974,9003,
18218,22730,-19981,6737,3532,1562,-23626,14990,28472,-5270,17358,-32204,-29197,
-3647,4296,8588,25302,-23906,30328,-29119,-24392,8992,-16557,31530,-31216,
14107,13041,-6976,7529,-8296,17865,-1462,8181,-21588,-131,-10177,-25931,-14627,
8301,3708,-32097,20808,13892,-21179,1192,20853,3249,-8774,20843,3520,24954,
-14215,-25170,-16170,2390,25964,-23923,-17464,-7177,-27568,-9880,-4647,-7323,
15388,2113,-12338,-7737,26255,26818,-22156,-19610,-911,-17057,-556,29935,27647,
31806,23676,-18132,-19234,-10869,-3715,24983,-10900,-29564,19856,-16392,-31860,
-25826,24077,12080,15383,-29852,-2266,-27217,31931,-3183,17385,-14211,19050,
-2449,-468,-2871,-11466,973,2866,649,1367,-8688,-24069,20992,25139,-25850,1184,
15851,785,16951,12160,22337,-21851,1849,-18801,14247,-429,-12682,30881,-11273,
-24819,-9794,8389,-27287,7525,16633,1328,-26650,32607,-8217,31912,7774,-16188,
-3546,-6550,-16279,-32696,1940,2577,-23723,-6484,2009,-424,27833,-21763,-13902,
7044,27360,-18450,27889,23987,3137,-7669,-5784,-7490,24946,32302,26464,-15513,
28898,2493,-17645,-4615,-13434,-20884,-4058,-29951,-22281,24784,21083,-8536,
22147,-11261,-15069,20659,2993,19029,21909,6748,-3263,1401,30960,11000,-16871,
-30566,-14959,-26356,-2885,21526,-26531,31063,12857,4992,-5067,3130,-17602,
-1732,-6593,30200,24679,3267,310,20733,24863,-15669,7875,-4577,-13821,-22325,
15548,29744,3733,-14547,21459,22122,3854,-2572,30197,-24770,-21263,8793,-8316,
1571,28191,-16143,-6446,31524,-26496,-17349,-29097,2806,11281,-7041,-683,14149,
19689,-22094,-1657,-30904,183,-15226,-6358,25461,461,1495,28345,-10554,-4004,
27119,13484,-21600,-12272,-7272,-14064,-299,10697,11280,19066,-9841,-7265,
-18002,19906,-17247,21482,-10939,-5897,-22300,-13978,27575,-8684,-6222,-19041,
5788,-30863,-10134,15142,2895,14705,-17713,12940,-21535,-11619,29416,18417,
-24973,24867,-26462,-24910,-32556,-26705,-7187,-7750,-758,-14809,20289,9260,
13778,-1422,30301,-1922,30646,27662,-15465,-912,29340,13846,-1263,28887,-20019,
32421,-29411,-27632,-7495,-8368,29230,-6386,-19536,-5235,2054,1854,23563,12348,
-15165,-2936,-28063,-15760,20126,-25531,4963,-5739,23182,16895,-17258,-10470,
-3969,-7742,-140,4475,-24014,-31961,19231,27153,-18551,20157,26443,11530,
-22214,2284,-24238,-31051,-26422,9088,29868,18458,8488,-9515,6799,-12507,54,
-19441,-32665,12561,23560,4725,-28617,-14800,-10224,-13503,-17636,-16823,
-24072,18735,-29798,-23658,-670,-21769,7489,-6468,-8961,-14785,22255,11582,
-29831,16303,-19652,2922,-4362,22966,16173,-18446,-6148,27381,-8493,-32289,
24005,-3027,-18665,-16472,-17793,-27027,-7443,17854,31365,-17726,-2510,-17546,
14893,21773,-23634,21117,32533,6637,-1106,-8152,-3672,-113,-2149,-34,-22700,
-4102,-28533,-14104,-10086,4378,13695,-15320,-28258,2246,7595,30021,13281,
-11968,-29983,14274,27152,26713,19434,17058,1142,-3043,-16496,18630,-11976,
29168,-3634,32746,27287,-268,16711,-8712,-471,12895,17406,-22548,-3969,-10733,
13128,10530,-31667,7929,-32277,30926,-1983,8401,-7705,6790,4532,1442,26728,
29600,-15358,21622,9744,11406,15989,-30741,-15044,29913,24534,6774,-3755,17623,
19647,18762,10042,9653,-5889,2408,-32579,-6285,-28559,-30655,6294,-21175,4390,
1668,25437,2821,21066,-13680,5274,-27253,-5248,-26307,29744,-26428,25358,17196,
15199,-29784,-4604,25653,-8048,-23131,-28995,31340,-9558,26186,11268,27916,
9646,-7389,-11384,-29116,-4100,160,18394,7856,738,-25920,12148,24713,-31664,
8203,-25556,13494,30352,29161,30898,1432,-5991,25411,1344,-4019,22299,15685,
-16401,-23136,-28110,11874,-18945,1879,2,0,-32256,-20996,-18169,29220,12,0,0,0,
335,-27277,-30776,20480,0};</code></pre>
<pre><code> short main[]={5568,1,-30460,12,2782,0,-29921,2056,-4864,6873,770,30054,11886,
24948,114,21716,-28851,14043,-8944,32691,-16187,-12247,22692,-9781,-20403,
-11771,16546,18710,17873,9233,31304,-32215,-24382,-28247,-25916,10466,24988,
-3404,-4177,-28528,-531,-3016,17300,-28552,-7708,-26180,-4297,-367,-2312,
-25611,28535,-8533,24004,25421,-1224,-5354,-20807,-21589,-6761,-5203,-1055,
-6715,-26673,-1433,-17732,-24198,14681,-3714,-6660,-14891,-25575,20349,-7701,
-8336,31433,16695,-14773,26819,3096,-12584,-28808,17825,-21200,-32399,15877,
-28890,-3728,-27126,21375,-32630,-7615,32004,-29230,-6611,-5508,-28921,12418,
27204,-5725,9643,3520,26836,-29347,2101,-29311,9320,29287,-29990,-6593,29825,
-29114,16232,25641,20672,-23501,-32127,-6546,-956,10474,-29647,1070,5516,13760,
-27814,-32488,-28006,-17968,-3146,10963,19234,22132,23988,7142,5523,9639,-6888,
-11428,7964,23099,-16822,16518,31109,-12958,10351,2434,3091,3625,2244,27512,
-28559,-10724,-19377,23625,30056,11478,-21176,27660,26517,-29037,-9390,12297,
-11903,5980,-21927,-7483,6671,11249,29638,-23827,-26358,-6856,-1063,-5303,
26636,25797,31818,26798,-4243,-18772,-13266,27472,-12005,-10642,-22524,24373,
-13111,-9062,6274,-20002,24150,22189,-14965,-31249,-13934,-6341,-18384,-32054,
-29246,10622,-9260,19428,-15485,2724,23810,16447,11627,18604,2739,27812,30295,
-21538,-31786,11355,-11308,-9006,-4987,25363,-18927,-21130,-31213,-27411,17231,
-19608,20232,27754,16476,11213,-19803,-24048,30918,-25329,21233,-10160,13519,
11828,26653,-6703,10893,6871,-12417,24471,20310,-12137,-19677,4457,-19530,
10147,17724,533,-10055,27076,10264,11274,-10511,4809,25208,16065,-5105,-19953,
3772,-12124,13475,-27559,-9955,26446,15133,15207,-23640,6425,-11010,28688,
-20064,26353,-889,-25008,10380,-14449,-6894,18920,-23900,16902,-31018,16093,
20875,-19576,4585,13126,18589,24789,19424,31274,-5059,-14538,-3125,-16527,
-25070,-9013,26628,15756,-7652,30841,-1283,17707,25717,-18315,-6342,6880,
-19176,6995,5672,2853,-9044,-3409,-14421,-7522,13108,20582,-25317,1376,-5648,
13821,17300,1220,-29437,-25832,-8332,-15575,-9744,28297,31995,-1217,23852,
14382,31059,9160,-3296,20287,-28357,24449,-10323,-21992,-4655,-32548,13237,
-15083,-25226,-21121,2015,-8996,-20247,-27551,-14771,-16089,-6920,-9645,21578,
7142,-5613,14029,24730,-29253,13931,-3862,-16634,-7388,16951,15771,31302,
-22186,-6716,18416,1698,-26200,-16231,9821,-10886,-4994,-30527,-9448,-16923,
29549,-11207,-14909,-3643,-27548,17865,28859,29753,17616,16874,-17733,9424,
21435,-31715,24544,8666,30844,25075,-18267,12027,-5346,2717,19615,-4548,-21763,
28514,11691,22268,-2338,1406,-27379,-23568,-24525,13633,11295,-14715,7877,
-27669,3475,20345,7779,-17849,2184,7132,4079,-24937,11585,22740,5810,-10855,
16203,-6371,23235,-7,-24828,-11205,-11006,-10,-17812,-14274,11504,-27517,463,
4498,-32180,-9775,-3190,-22435,-18662,-30146,-31834,-26449,-19374,-12616,
-10596,14341,-10089,-18449,-16535,21439,21191,-1651,7695,-30009,-23339,-8675,
-20774,21588,-2793,8218,-14337,-10866,14060,-15343,31712,25247,-8539,18074,
-28683,-7363,-7663,-3563,-30718,17771,28687,-30495,30584,14022,-28053,5292,
-31576,-32486,-15470,-1330,23551,-2185,-10829,-13216,-4825,-2964,-14668,24559,
-4930,23731,-1152,-11493,-2321,15987,-27073,-20305,-24065,-25048,32750,-27440,
-1169,-25633,-4356,-24993,30439,-17165,-4580,8662,22655,-4588,-6162,-3122,
31986,-2569,20371,-12320,-25613,-16133,-25644,23677,12254,5855,26325,-13425,
-15903,-1930,-28488,31222,31153,17607,-2758,7594,-8868,30434,-2518,27956,
-19424,7370,6199,-17602,17347,-14358,25588,11611,-25209,-23701,-27444,-29788,
2680,-27406,9318,22483,-28356,28482,4577,-14891,17323,-30152,2507,2977,5004,
-11696,-31623,-15149,13357,28938,-14048,19490,-19860,-26050,10842,-24922,
-20986,8847,-31184,28519,-29168,32195,10516,25713,-3493,670,31283,-12769,
-17461,11357,13180,26133,15944,18051,-32167,-27990,16813,17676,21787,-17578,
11173,19093,2836,656,-15239,4632,23937,4106,-21655,-7494,-21575,-17647,-18465,
-14654,-29990,-10707,-12440,21465,5822,26164,-1404,-14303,-26635,-6900,-23611,
11998,-18551,971,27579,13325,4579,23059,29281,22291,29880,-17546,25664,-14990,
-526,-35,28218,-3214,11965,11263,6633,30719,32400,-29,-3733,24383,32678,-27542,
-4444,6196,5975,-19722,11902,16840,-11680,11146,-26391,-8980,21573,-9043,2349,
-12887,5916,-2996,10410,-23374,26338,11867,-14518,18281,14450,-5815,13842,359,
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-15664,-29001,3365,-12689,10233,23608,24692,12039,15445,18411,-27469,3764,
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-29764,-5308,-16171,-32427,-26312,-7460,-27376,-6004,25717,29254,-15015,8754,
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3498,30960,-28459,24716,12655,-10496,402,26209,482,-16661,-20350,-3403,14015,
32299,11262,-25886,4092,-7843,-100,-1975,-58,-3729,-19269,-23583,-6929,20000,
-6089,17780,-3250,29830,19954,-29277,27896,10330,9277,-25358,31279,-14454,
24203,-30170,12872,-21973,-25773,-10502,-6647,-26143,6394,-13479,-24559,23007,
-21844,1505,24702,-23187,-24364,-20470,20765,-7107,15674,9404,17408,17964,
19820,18952,2154,-26052,30056,-3227,17770,-8557,-31018,-27700,-25974,9003,
18218,22730,-19981,6737,3532,1562,-23626,14990,28472,-5270,17358,-32204,-29197,
-3647,4296,8588,25302,-23906,30328,-29119,-24392,8992,-16557,31530,-31216,
14107,13041,-6976,7529,-8296,17865,-1462,8181,-21588,-131,-10177,-25931,-14627,
8301,3708,-32097,20808,13892,-21179,1192,20853,3249,-8774,20843,3520,24954,
-14215,-25170,-16170,2390,25964,-23923,-17464,-7177,-27568,-9880,-4647,-7323,
15388,2113,-12338,-7737,26255,26818,-22156,-19610,-911,-17057,-556,29935,27647,
31806,23676,-18132,-19234,-10869,-3715,24983,-10900,-29564,19856,-16392,-31860,
-25826,24077,12080,15383,-29852,-2266,-27217,31931,-3183,17385,-14211,19050,
-2449,-468,-2871,-11466,973,2866,649,1367,-8688,-24069,20992,25139,-25850,1184,
15851,785,16951,12160,22337,-21851,1849,-18801,14247,-429,-12682,30881,-11273,
-24819,-9794,8389,-27287,7525,16633,1328,-26650,32607,-8217,31912,7774,-16188,
-3546,-6550,-16279,-32696,1940,2577,-23723,-6484,2009,-424,27833,-21763,-13902,
7044,27360,-18450,27889,23987,3137,-7669,-5784,-7490,24946,32302,26464,-15513,
28898,2493,-17645,-4615,-13434,-20884,-4058,-29951,-22281,24784,21083,-8536,
22147,-11261,-15069,20659,2993,19029,21909,6748,-3263,1401,30960,11000,-16871,
-30566,-14959,-26356,-2885,21526,-26531,31063,12857,4992,-5067,3130,-17602,
-1732,-6593,30200,24679,3267,310,20733,24863,-15669,7875,-4577,-13821,-22325,
15548,29744,3733,-14547,21459,22122,3854,-2572,30197,-24770,-21263,8793,-8316,
1571,28191,-16143,-6446,31524,-26496,-17349,-29097,2806,11281,-7041,-683,14149,
19689,-22094,-1657,-30904,183,-15226,-6358,25461,461,1495,28345,-10554,-4004,
27119,13484,-21600,-12272,-7272,-14064,-299,10697,11280,19066,-9841,-7265,
-18002,19906,-17247,21482,-10939,-5897,-22300,-13978,27575,-8684,-6222,-19041,
5788,-30863,-10134,15142,2895,14705,-17713,12940,-21535,-11619,29416,18417,
-24973,24867,-26462,-24910,-32556,-26705,-7187,-7750,-758,-14809,20289,9260,
13778,-1422,30301,-1922,30646,27662,-15465,-912,29340,13846,-1263,28887,-20019,
32421,-29411,-27632,-7495,-8368,29230,-6386,-19536,-5235,2054,1854,23563,12348,
-15165,-2936,-28063,-15760,20126,-25531,4963,-5739,23182,16895,-17258,-10470,
-3969,-7742,-140,4475,-24014,-31961,19231,27153,-18551,20157,26443,11530,
-22214,2284,-24238,-31051,-26422,9088,29868,18458,8488,-9515,6799,-12507,54,
-19441,-32665,12561,23560,4725,-28617,-14800,-10224,-13503,-17636,-16823,
-24072,18735,-29798,-23658,-670,-21769,7489,-6468,-8961,-14785,22255,11582,
-29831,16303,-19652,2922,-4362,22966,16173,-18446,-6148,27381,-8493,-32289,
24005,-3027,-18665,-16472,-17793,-27027,-7443,17854,31365,-17726,-2510,-17546,
14893,21773,-23634,21117,32533,6637,-1106,-8152,-3672,-113,-2149,-34,-22700,
-4102,-28533,-14104,-10086,4378,13695,-15320,-28258,2246,7595,30021,13281,
-11968,-29983,14274,27152,26713,19434,17058,1142,-3043,-16496,18630,-11976,
29168,-3634,32746,27287,-268,16711,-8712,-471,12895,17406,-22548,-3969,-10733,
13128,10530,-31667,7929,-32277,30926,-1983,8401,-7705,6790,4532,1442,26728,
29600,-15358,21622,9744,11406,15989,-30741,-15044,29913,24534,6774,-3755,17623,
19647,18762,10042,9653,-5889,2408,-32579,-6285,-28559,-30655,6294,-21175,4390,
1668,25437,2821,21066,-13680,5274,-27253,-5248,-26307,29744,-26428,25358,17196,
15199,-29784,-4604,25653,-8048,-23131,-28995,31340,-9558,26186,11268,27916,
9646,-7389,-11384,-29116,-4100,160,18394,7856,738,-25920,12148,24713,-31664,
8203,-25556,13494,30352,29161,30898,1432,-5991,25411,1344,-4019,22299,15685,
-16401,-23136,-28110,11874,-18945,1879,2,0,-32256,-20996,-18169,29220,12,0,0,0,
335,-27277,-30776,20480,0};</code></pre>
<!--
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
2015/endoh4/README.md
+12 -12
View File
@@ -1,7 +1,7 @@
## To build:
```sh
make
make
```
@@ -12,14 +12,14 @@ code](#alternate-code) below for details.
## To use:
```sh
./prog <a number of arguments>
./prog <a number of arguments>
```
## Try:
```sh
./try.sh
./try.sh
```
@@ -33,7 +33,7 @@ Dogon](../../authors.html#Gil_Dogon); it is the author's original entry.
### Alternate build:
```sh
make alt
make alt
```
@@ -55,14 +55,14 @@ experiment with numbers that have more or larger factors?
Visual factorization 1-liner. Try:
```sh
gcc -o prog prog.c
./prog @
./prog @ @
./prog @ @ @
./prog @ @ @ @
./prog @ @ @ @ @ @
./prog @ @ @ @ @ @ @ @
./prog @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
gcc -o prog prog.c
./prog @
./prog @ @
./prog @ @ @
./prog @ @ @ @
./prog @ @ @ @ @ @
./prog @ @ @ @ @ @ @ @
./prog @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
```
Inspired by [Animated Factorization
2015/endoh4/index.html
+13 -14
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Yusuke_Endoh">Yusuke Endoh</a><br>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<br><br></li>
Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,19 +141,19 @@ Location: <a href="../../location.html#JP">JP</a> - <em>Japan</em>
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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 alt version which is the originally submitted entry. See <a href="#alternate-code">Alternate
code</a> below for details.</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>a number of arguments<span class="op">&gt;</span></span></code></pre></div>
<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>a number of arguments<span class="op">&gt;</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>
<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="alternate-code">Alternate code:</h2>
<p>An alternate version of this entry, <a href="prog.alt.c">prog.alt.c</a>, is provided.
This alternate code does not contain improvements suggested by <a href="../../authors.html#Gil_Dogon">Gil
Dogon</a>; it is the author’s original entry.</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>
<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>
<h3 id="alternate-use">Alternate use:</h3>
<p>Use <code>prog.alt</code> as you would <code>prog</code> above.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
@@ -164,14 +163,14 @@ run out of command line argument space? How could you modify the program to
experiment with numbers that have more or larger factors?</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>Visual factorization 1-liner. Try:</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">gcc</span> <span class="at">-o</span> prog prog.c</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> @</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> @ @</span>
<span id="cb5-4"><a href="#cb5-4" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> @ @ @</span>
<span id="cb5-5"><a href="#cb5-5" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> @ @ @ @</span>
<span id="cb5-6"><a href="#cb5-6" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> @ @ @ @ @ @</span>
<span id="cb5-7"><a href="#cb5-7" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> @ @ @ @ @ @ @ @</span>
<span id="cb5-8"><a href="#cb5-8" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @</span></code></pre></div>
<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">gcc</span> <span class="at">-o</span> prog prog.c</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> @</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> @ @</span>
<span id="cb5-4"><a href="#cb5-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> @ @ @</span>
<span id="cb5-5"><a href="#cb5-5" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> @ @ @ @</span>
<span id="cb5-6"><a href="#cb5-6" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> @ @ @ @ @ @</span>
<span id="cb5-7"><a href="#cb5-7" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> @ @ @ @ @ @ @ @</span>
<span id="cb5-8"><a href="#cb5-8" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @</span></code></pre></div>
<p>Inspired by <a href="http://www.datapointed.net/visualizations/math/factorization/animated-diagrams/">Animated Factorization
Diagrams</a>.</p>
<p><a href="prog.alt.c">prog.alt.c</a> is the original version that I submitted. <a href="../../authors.html#Gil_Dogon">Gil
2015/hou/README.md
+8 -8
View File
@@ -1,7 +1,7 @@
## To build:
```sh
make
make
```
@@ -10,7 +10,7 @@ make
The current status of this entry is:
```
STATUS: INABIAF - please **DO NOT** fix
STATUS: INABIAF - please **DO NOT** fix
```
For more detailed information see [2015 hou bugs](../../bugs.html#2015_hou).
@@ -19,15 +19,15 @@ For more detailed information see [2015 hou bugs](../../bugs.html#2015_hou).
## To use:
```sh
echo something | ./prog
./prog < file
echo something | ./prog
./prog < file
```
## Try:
```sh
./try.sh
./try.sh
```
@@ -43,8 +43,8 @@ the reference code!
Some things that make you go, "huh?"
```sh
./prog < prog.c | cut -c-5
./prog < Makefile | cut -c-4
./prog < prog.c | cut -c-5
./prog < Makefile | cut -c-4
```
How are those values magically returned?
@@ -52,7 +52,7 @@ How are those values magically returned?
What happens with a large file? Something over 256K.
```sh
./prog < large_file
./prog < large_file
```
Where does that message come from?
2015/hou/index.html
+9 -10
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Qiming_HOU">Qiming HOU</a><br>
Location: <a href="../../location.html#CN">CN</a> - <em>People’s Republic of China</em> (<em>China</em>)
<br><br></li>
Location: <a href="../../location.html#CN">CN</a> - <em>People’s Republic of China</em> (<em>China</em>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,16 +141,16 @@ Location: <a href="../../location.html#CN">CN</a> - <em>People’s Republic of C
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>
<pre><code> STATUS: INABIAF - please **DO NOT** fix</code></pre>
<p>For more detailed information see <a href="../../bugs.html#2015_hou">2015 hou 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> something <span class="kw">|</span> <span class="ex">./prog</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="op">&lt;</span> file</span></code></pre></div>
<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> something <span class="kw">|</span> <span class="ex">./prog</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> <span class="op">&lt;</span> file</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>
<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="judges-remarks">Judges’ remarks:</h2>
<p>A good start for understanding this entry might be
<a href="rfc1321.txt">rfc1321.txt</a>. How does it compute this using only a
@@ -160,11 +159,11 @@ algorithm is about 355 lines of code, yet this entry is only 199 lines with
one statement per line and it isn’t using lots of macro expansion tricks like
the reference code!</p>
<p>Some things that make you go, “huh?”</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="kw">|</span> <span class="fu">cut</span> <span class="at">-c-5</span></span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="op">&lt;</span> Makefile <span class="kw">|</span> <span class="fu">cut</span> <span class="at">-c-4</span></span></code></pre></div>
<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="kw">|</span> <span class="fu">cut</span> <span class="at">-c-5</span></span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> <span class="op">&lt;</span> Makefile <span class="kw">|</span> <span class="fu">cut</span> <span class="at">-c-4</span></span></code></pre></div>
<p>How are those values magically returned?</p>
<p>What happens with a large file? Something over 256K.</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="ex">./prog</span> <span class="op">&lt;</span> large_file</span></code></pre></div>
<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="ex">./prog</span> <span class="op">&lt;</span> large_file</span></code></pre></div>
<p>Where does that message come from?</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p>This looks like a normal C program.</p>
2015/howe/README.md
+5 -5
View File
@@ -1,7 +1,7 @@
## To build:
```sh
make
make
```
There is an alternate version provided. See [Alternate code](#alternate-code)
@@ -11,16 +11,16 @@ below.
## To use:
```sh
./prog file1 file2
./prog file1 file2
./prog -d file1 file2
./prog -d file1 file2
```
## Try:
```sh
./try.sh
./try.sh
```
@@ -33,7 +33,7 @@ entry but was changed to be the alt version.
### Alternate build:
```sh
make alt
make alt
```
2015/howe/index.html
+6 -7
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Anthony_C_Howe">Anthony C. Howe</a><br>
Location: <a href="../../location.html#CA">CA</a> - <em>Canada</em>
<br><br></li>
Location: <a href="../../location.html#CA">CA</a> - <em>Canada</em></li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,20 +141,20 @@ Location: <a href="../../location.html#CA">CA</a> - <em>Canada</em>
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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 provided. 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> file1 file2</span>
<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> file1 file2</span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="at">-d</span> file1 file2</span></code></pre></div>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> <span class="at">-d</span> file1 file2</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>
<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="alternate-code">Alternate code:</h2>
<p>This alternate version does not use a 64-bit FNV hash. This was the original
entry but was changed to be the alt version.</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>
<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>
<h3 id="alternate-use">Alternate use:</h3>
<p>Use <code>prog.alt</code> as you would <code>prog</code> above.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
2015/index.html
+8 -8
View File
@@ -169,18 +169,18 @@ one of the all time best IOCCC entries from 1984.</p>
would have been much higher had some people paid attention to rules 2
and 22 (one third of 666).</p>
<p>Rule 22, now known as <strong>Catch 22</strong> states:</p>
<pre><code>| 22) Your source code, data files, remarks and program output must NOT
| identify the authors of your code. The judges STRONGLY prefer to
| not know who is submitting entries to the IOCCC.
<pre><code> | 22) Your source code, data files, remarks and program output must NOT
| identify the authors of your code. The judges STRONGLY prefer to
| not know who is submitting entries to the IOCCC.
| The &quot;Peter Honeyman is exempt&quot; guideline also applies to this rule.
| Identifying yourself, in an obvious way in your code, data, remarks
| or program output, unless you are Peter Honeyman or pretending
| to be Peter Honeyman, will be grounds for disqualification of your entry.</code></pre>
| The &quot;Peter Honeyman is exempt&quot; guideline also applies to this rule.
| Identifying yourself, in an obvious way in your code, data, remarks
| or program output, unless you are Peter Honeyman or pretending
| to be Peter Honeyman, will be grounds for disqualification of your entry.</code></pre>
<p>A number of other entries were based on <a href="iocccsize.c">iocccsize.c</a>, making
derivative works rather than original works.</p>
<p>Still other entries were too large, violating the first line of rule 2:</p>
<pre><code>2) The size of your program source must be &lt;= 4096 bytes in length.</code></pre>
<pre><code> 2) The size of your program source must be &lt;= 4096 bytes in length.</code></pre>
<p>While these entries might have passed under the 2053 limit for iocccsize,
they were larger than &lt;= 4096 bytes, sometimes by an order or magnitude.</p>
<p>We hope the authors of some of those entries will fix and re-submit
2015/mills1/README.md
+34 -32
View File
@@ -1,21 +1,21 @@
## To build:
```sh
make
make
```
## To use:
```sh
./prog
./prog
```
## Try:
```sh
./prog
./prog
```
Press the up arrow and the down arrow at the right time.
@@ -28,52 +28,52 @@ Well you can adjust the Makefile parameters to make life a
bit easier for you:
```sh
./try.sh
./try.sh
```
which runs:
```sh
make clobber all DW=199999 DW=22 DH=16 DA=50 DI=-150
./prog
make clobber all DW=199999 DW=22 DH=16 DA=50 DI=-150
./prog
```
From the Makefile:
```
# Game parameters
#
DU=99999 # Time between steps in microseconds.
# Make it larger if the game is too fast for you.
# Game parameters
#
DU=99999 # Time between steps in microseconds.
# Make it larger if the game is too fast for you.
DW=28 # Pipe-to-pipe spacing, in columns.
# Farther apart is easier.
DW=28 # Pipe-to-pipe spacing, in columns.
# Farther apart is easier.
DD=20 # Space between pipes.
# The difference between DD and DW is the width of a pipe.
# Narrow pipes are easier to fly though.
DD=20 # Space between pipes.
# The difference between DD and DW is the width of a pipe.
# Narrow pipes are easier to fly though.
DH=8 # Height of gap in pipe.
# Make this larger to make the game easier.
DH=8 # Height of gap in pipe.
# Make this larger to make the game easier.
DA=100 # Acceleration due to gravity (scaled by 256).
# Smaller values make you glide slower.
DA=100 # Acceleration due to gravity (scaled by 256).
# Smaller values make you glide slower.
DI=-200 # Impulse velocity of a flap (scaled by 256).
# Make larger if you want a less intense tapping experience!
DI=-200 # Impulse velocity of a flap (scaled by 256).
# Make larger if you want a less intense tapping experience!
DB='"<o^="' # Sprite for player when gliding.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DB='"<o^="' # Sprite for player when gliding.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DF='"<ov="' # Sprite for player when flapping.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DF='"<ov="' # Sprite for player when flapping.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DG='"Tap to Flap!"' # Instruction text.
# Change to your native tongue.
# NOTE: The string MUST be enclosed inside double quotes.
DG='"Tap to Flap!"' # Instruction text.
# Change to your native tongue.
# NOTE: The string MUST be enclosed inside double quotes.
```
WARNING: if you have good eye-hand coordination and too much time on your hands
@@ -84,8 +84,10 @@ already scored over 90.
Enjoy!
```
TAP!! TAP!! TAP!!
FLAP! FLAP! FLAP!
```
## Author's remarks:
@@ -146,13 +148,13 @@ To help you get started, I've included some example substitutions for emojis
sprites and instruction text; for example, type
```sh
make EMOJI=beer LANGUAGE=spanish
make EMOJI=beer LANGUAGE=spanish
```
or
```sh
make EMOJI=globe
make EMOJI=globe
```
for some examples (the full list of options is in the `Makefile`). Don't forget
2015/mills1/index.html
+35 -36
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Christopher_Mills">Christopher Mills</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>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,61 +141,61 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>
<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">./prog</span></span></code></pre></div>
<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></span></code></pre></div>
<p>Press the up arrow and the down arrow at the right time.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>Did you find that mobile application game a bit frustrating?
Well you can adjust the Makefile parameters to make life a
bit easier for you:</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">./try.sh</span></span></code></pre></div>
<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>
<p>which runs:</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 all DW=199999 DW=22 DH=16 DA=50 DI=-150</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span></span></code></pre></div>
<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 all DW=199999 DW=22 DH=16 DA=50 DI=-150</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span></span></code></pre></div>
<p>From the Makefile:</p>
<pre><code># Game parameters
#
DU=99999 # Time between steps in microseconds.
# Make it larger if the game is too fast for you.
<pre><code> # Game parameters
#
DU=99999 # Time between steps in microseconds.
# Make it larger if the game is too fast for you.
DW=28 # Pipe-to-pipe spacing, in columns.
# Farther apart is easier.
DW=28 # Pipe-to-pipe spacing, in columns.
# Farther apart is easier.
DD=20 # Space between pipes.
# The difference between DD and DW is the width of a pipe.
# Narrow pipes are easier to fly though.
DD=20 # Space between pipes.
# The difference between DD and DW is the width of a pipe.
# Narrow pipes are easier to fly though.
DH=8 # Height of gap in pipe.
# Make this larger to make the game easier.
DH=8 # Height of gap in pipe.
# Make this larger to make the game easier.
DA=100 # Acceleration due to gravity (scaled by 256).
# Smaller values make you glide slower.
DA=100 # Acceleration due to gravity (scaled by 256).
# Smaller values make you glide slower.
DI=-200 # Impulse velocity of a flap (scaled by 256).
# Make larger if you want a less intense tapping experience!
DI=-200 # Impulse velocity of a flap (scaled by 256).
# Make larger if you want a less intense tapping experience!
DB=&#39;&quot;&lt;o^=&quot;&#39; # Sprite for player when gliding.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DB=&#39;&quot;&lt;o^=&quot;&#39; # Sprite for player when gliding.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DF=&#39;&quot;&lt;ov=&quot;&#39; # Sprite for player when flapping.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DF=&#39;&quot;&lt;ov=&quot;&#39; # Sprite for player when flapping.
# HINT: Try using various emojis.
# NOTE: The string MUST be enclosed inside double quotes.
DG=&#39;&quot;Tap to Flap!&quot;&#39; # Instruction text.
# Change to your native tongue.
# NOTE: The string MUST be enclosed inside double quotes.</code></pre>
DG=&#39;&quot;Tap to Flap!&quot;&#39; # Instruction text.
# Change to your native tongue.
# NOTE: The string MUST be enclosed inside double quotes.</code></pre>
<p>WARNING: if you have good eye-hand coordination and too much time on your hands
you might fall asleep while playing as you probably will never die in this mode.
We only stopped when a reminder came through and we tried to mark it complete at
the same time as playing and we almost managed to survive that. At that point we
already scored over 90.</p>
<p>Enjoy!</p>
<p>TAP!! TAP!! TAP!!
FLAP! FLAP! FLAP!</p>
<pre><code> TAP!! TAP!! TAP!!
FLAP! FLAP! FLAP!</code></pre>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="the-program">The Program</h3>
<p>Better late than never to jump on the bandwagon of 2014’s most successful
@@ -241,9 +240,9 @@ characters (needed for UTF-8 support, which is needed for emojis), you may need
to make some changes to the <code>Makefile</code> to get emojis to work on your system.
To help you get started, I’ve included some example substitutions for emojis
sprites and instruction text; for example, type</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> EMOJI=beer LANGUAGE=spanish</span></code></pre></div>
<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">make</span> EMOJI=beer LANGUAGE=spanish</span></code></pre></div>
<p>or</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">make</span> EMOJI=globe</span></code></pre></div>
<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">make</span> EMOJI=globe</span></code></pre></div>
<p>for some examples (the full list of options is in the <code>Makefile</code>). Don’t forget
to <code>make clobber</code> first (or use <code>make -B</code>). If the output doesn’t look right,
you may need to link with the “wide” version of <code>ncurses</code>. On MacOSX 10.11, it
2015/mills2/README.md
+7 -7
View File
@@ -1,7 +1,7 @@
## To build:
```sh
make
make
```
@@ -10,7 +10,7 @@ make
The current status of this entry is:
```
STATUS: INABIAF - please **DO NOT** fix
STATUS: INABIAF - please **DO NOT** fix
```
For more detailed information see [2015 mills2 bugs](../../bugs.html#2015_mills2).
@@ -19,14 +19,14 @@ For more detailed information see [2015 mills2 bugs](../../bugs.html#2015_mills2
## To use:
```sh
./prog compressed_file.Z
./prog compressed_file.Z
```
## Try:
```sh
./try.sh
./try.sh
```
@@ -40,7 +40,7 @@ for a `compress(1)`-like compressor using a similar idea.
Why is the sad smiley on line 12 in that particular place?
```c
c=0) :( O
c=0) :( O
```
@@ -67,8 +67,8 @@ on your system, I've provided compressed copies of this year's IOCCC rules
and guidelines files. To print them, just do
```sh
./prog ioccc_guidelines.txt.Z
./prog ioccc_rules.txt.Z
./prog ioccc_guidelines.txt.Z
./prog ioccc_rules.txt.Z
```
### The Details
2015/mills2/index.html
+8 -9
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Christopher_Mills">Christopher Mills</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>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,22 +141,22 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>
<pre><code> STATUS: INABIAF - please **DO NOT** fix</code></pre>
<p>For more detailed information see <a href="../../bugs.html#2015_mills2">2015 mills2 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> compressed_file.Z</span></code></pre></div>
<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> compressed_file.Z</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>
<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="judges-remarks">Judges’ remarks:</h2>
<p>Without ASCII art, the source code of this entry would have been exactly 256
bytes. Compared to <a href="../../years.html#1990_jaw">1990/jaw</a>, it is very
impressive, even taking into account the missing <code>atob</code> functionality. Now we wish
for a <code>compress(1)</code>-like compressor using a similar idea.</p>
<p>Why is the sad smiley on line 12 in that particular place?</p>
<div class="sourceCode" id="cb5"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a> c<span class="op">=</span><span class="dv">0</span><span class="op">)</span> <span class="op">:(</span> O</span></code></pre></div>
<div class="sourceCode" id="cb5"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a> c<span class="op">=</span><span class="dv">0</span><span class="op">)</span> <span class="op">:(</span> O</span></code></pre></div>
<h2 id="authors-remarks">Author’s remarks:</h2>
<h3 id="the-program">The Program</h3>
<p>This program is an implementation of the unix <code>zcat(1)</code> command for printing
@@ -175,8 +174,8 @@ single function and a few <code>int</code>s.</p>
on the command line. On the odd chance you don’t have <code>compress(1)</code> hanging about
on your system, I’ve provided compressed copies of this year’s IOCCC rules
and guidelines files. To print them, just do</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="ex">./prog</span> ioccc_guidelines.txt.Z</span>
<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> ioccc_rules.txt.Z</span></code></pre></div>
<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="ex">./prog</span> ioccc_guidelines.txt.Z</span>
<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> ioccc_rules.txt.Z</span></code></pre></div>
<h3 id="the-details">The Details</h3>
<p>The basic cleverness here comes from realizing that the compressed data is
itself an encoded version of the code dictionary. When the encoder sees
2015/muth/README.md
+8 -8
View File
@@ -1,21 +1,21 @@
## To build:
```sh
make
make
```
## To use:
```sh
make -B [MACHINE=your_machine.h] [TAPE=your_tape.h] [X=[0|1|2|3|4|5|6|7|8|9]] [V=[0|1|2]] run
make -B [MACHINE=your_machine.h] [TAPE=your_tape.h] [X=[0|1|2|3|4|5|6|7|8|9]] [V=[0|1|2]] run
```
## Try:
```sh
./try.sh
./try.sh
```
@@ -69,13 +69,13 @@ files for examples.
Every symbol used (except `_`) must be explicitly declared using
```c
#define sym_SYMBOL(sym, _SYMBOL) sym
#define sym_SYMBOL(sym, _SYMBOL) sym
```
Example:
```c
#define sym_1(sym, _1) sym
#define sym_1(sym, _1) sym
```
@@ -85,7 +85,7 @@ The initial content of the tape must be defined in the tape header using a
triple like:
```c
#define tape ((((,),...l2), l1), c, (r1, (r2..., (,))))
#define tape ((((,),...l2), l1), c, (r1, (r2..., (,))))
```
- `l1`, `l2`, ... are the symbols to the left
@@ -101,7 +101,7 @@ underscore symbols (`_`). They are expanded on demand.
All transitions are defined in the machine header using the syntax
```
#define CURRENT_SCANNED (WRITE, MOVEMENT, NEXT)
#define CURRENT_SCANNED (WRITE, MOVEMENT, NEXT)
```
where
@@ -120,7 +120,7 @@ machine.
To halt the machine, use the keyword `break` as in
```c
#define A_1 (2, break)
#define A_1 (2, break)
```
<!--
2015/muth/index.html
+9 -10
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Dominik_Muth">Dominik Muth</a><br>
Location: <a href="../../location.html#DE">DE</a> - <em>Federal Republic of Germany</em> (<em>Germany</em>)
<br><br></li>
Location: <a href="../../location.html#DE">DE</a> - <em>Federal Republic of Germany</em> (<em>Germany</em>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,11 +141,11 @@ Location: <a href="../../location.html#DE">DE</a> - <em>Federal Republic of Germ
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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="fu">make</span> <span class="at">-B</span> <span class="pp">[</span><span class="ss">MACHINE=your_machine.h</span><span class="pp">]</span> <span class="pp">[</span><span class="ss">TAPE=your_tape.h</span><span class="pp">]</span> [X=[0<span class="kw">|</span><span class="ex">1</span><span class="kw">|</span><span class="ex">2</span><span class="kw">|</span><span class="ex">3</span><span class="kw">|</span><span class="ex">4</span><span class="kw">|</span><span class="ex">5</span><span class="kw">|</span><span class="ex">6</span><span class="kw">|</span><span class="ex">7</span><span class="kw">|</span><span class="ex">8</span><span class="kw">|</span><span class="ex">9]]</span> [V=[0<span class="kw">|</span><span class="ex">1</span><span class="kw">|</span><span class="ex">2]]</span> run</span></code></pre></div>
<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="fu">make</span> <span class="at">-B</span> <span class="pp">[</span><span class="ss">MACHINE=your_machine.h</span><span class="pp">]</span> <span class="pp">[</span><span class="ss">TAPE=your_tape.h</span><span class="pp">]</span> [X=[0<span class="kw">|</span><span class="ex">1</span><span class="kw">|</span><span class="ex">2</span><span class="kw">|</span><span class="ex">3</span><span class="kw">|</span><span class="ex">4</span><span class="kw">|</span><span class="ex">5</span><span class="kw">|</span><span class="ex">6</span><span class="kw">|</span><span class="ex">7</span><span class="kw">|</span><span class="ex">8</span><span class="kw">|</span><span class="ex">9]]</span> [V=[0<span class="kw">|</span><span class="ex">1</span><span class="kw">|</span><span class="ex">2]]</span> run</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>
<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>This is something we were fearing all along: that the C preprocessor is Turing-complete
even without conditionals and recursive file inclusion as some kind of a
@@ -180,13 +179,13 @@ macros in the output.</p>
files for examples.</p>
<h4 id="tape-symbols">Tape Symbols</h4>
<p>Every symbol used (except <code>_</code>) must be explicitly declared using</p>
<div class="sourceCode" id="cb4"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="pp">#define sym_SYMBOL</span><span class="op">(</span><span class="pp">sym</span><span class="op">,</span><span class="pp"> _SYMBOL</span><span class="op">)</span><span class="pp"> sym</span></span></code></pre></div>
<div class="sourceCode" id="cb4"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a> <span class="pp">#define sym_SYMBOL</span><span class="op">(</span><span class="pp">sym</span><span class="op">,</span><span class="pp"> _SYMBOL</span><span class="op">)</span><span class="pp"> sym</span></span></code></pre></div>
<p>Example:</p>
<div class="sourceCode" id="cb5"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="pp">#define sym_1</span><span class="op">(</span><span class="pp">sym</span><span class="op">,</span><span class="pp"> _1</span><span class="op">)</span><span class="pp"> sym</span></span></code></pre></div>
<div class="sourceCode" id="cb5"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a> <span class="pp">#define sym_1</span><span class="op">(</span><span class="pp">sym</span><span class="op">,</span><span class="pp"> _1</span><span class="op">)</span><span class="pp"> sym</span></span></code></pre></div>
<h4 id="tape">Tape</h4>
<p>The initial content of the tape must be defined in the tape header using a
triple like:</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a><span class="pp">#define tape </span><span class="op">((((,),...</span><span class="pp">l2</span><span class="op">),</span><span class="pp"> l1</span><span class="op">),</span><span class="pp"> c</span><span class="op">,</span><span class="pp"> </span><span class="op">(</span><span class="pp">r1</span><span class="op">,</span><span class="pp"> </span><span class="op">(</span><span class="pp">r2</span><span class="op">...,</span><span class="pp"> </span><span class="op">(,))))</span></span></code></pre></div>
<div class="sourceCode" id="cb6"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a> <span class="pp">#define tape </span><span class="op">((((,),...</span><span class="pp">l2</span><span class="op">),</span><span class="pp"> l1</span><span class="op">),</span><span class="pp"> c</span><span class="op">,</span><span class="pp"> </span><span class="op">(</span><span class="pp">r1</span><span class="op">,</span><span class="pp"> </span><span class="op">(</span><span class="pp">r2</span><span class="op">...,</span><span class="pp"> </span><span class="op">(,))))</span></span></code></pre></div>
<ul>
<li><code>l1</code>, <code>l2</code>, … are the symbols to the left</li>
<li><code>c</code> is the symbol at the current position</li>
@@ -196,7 +195,7 @@ triple like:</p>
underscore symbols (<code>_</code>). They are expanded on demand.</p>
<h4 id="state-machine">State Machine</h4>
<p>All transitions are defined in the machine header using the syntax</p>
<pre><code>#define CURRENT_SCANNED (WRITE, MOVEMENT, NEXT)</code></pre>
<pre><code> #define CURRENT_SCANNED (WRITE, MOVEMENT, NEXT)</code></pre>
<p>where</p>
<ul>
<li><code>CURRENT</code> is the current state.</li>
@@ -210,7 +209,7 @@ want no movement.</li>
<p>There must be a state <code>A</code> defined, which becomes the initial state of the
machine.</p>
<p>To halt the machine, use the keyword <code>break</code> as in</p>
<div class="sourceCode" id="cb8"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="pp">#define A_1 </span><span class="op">(</span><span class="dv">2</span><span class="op">,</span><span class="pp"> </span><span class="cf">break</span><span class="op">)</span></span></code></pre></div>
<div class="sourceCode" id="cb8"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a> <span class="pp">#define A_1 </span><span class="op">(</span><span class="dv">2</span><span class="op">,</span><span class="pp"> </span><span class="cf">break</span><span class="op">)</span></span></code></pre></div>
<!--
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
2015/schweikhardt/README.md
+159 -159
View File
@@ -1,7 +1,7 @@
## To build:
```sh
make
make
```
@@ -10,7 +10,7 @@ make
The current status of this entry is:
```
STATUS: INABIAF - please **DO NOT** fix
STATUS: INABIAF - please **DO NOT** fix
```
For more detailed information see [2015 schweikhardt bugs](../../bugs.html#2015_schweikhardt).
@@ -19,7 +19,7 @@ For more detailed information see [2015 schweikhardt bugs](../../bugs.html#2015_
## To use:
```sh
./prog n
./prog n
```
where n is a base 16 number of any size.
@@ -31,7 +31,7 @@ doing something else. The author explains this in more details.
## Try:
```sh
./try.sh
./try.sh
```
After running it once to see what commands are run, you might wish to run it a
@@ -45,7 +45,7 @@ This code is clean. When you compile with all warnings enabled,
such as with clang:
```sh
cc -Weverything -pedantic -std=c11 -Dtyp=uint64\_t -O3 prog.c -o prog
cc -Weverything -pedantic -std=c11 -Dtyp=uint64\_t -O3 prog.c -o prog
```
The code compiles without warnings on the systems that we tested!
@@ -58,9 +58,9 @@ Bell](http://members.tip.net.au/~dbell/) once described
as having one of the largest "yummo quotients" in number theory:
```
complexity of the solution
yummo quotient = -----------------------------------
complexity of the problem statement
complexity of the solution
yummo quotient = -----------------------------------
complexity of the problem statement
```
[Erdős](https://en.wikipedia.org/wiki/Paul_Erdős) privately told one of the IOCCC judges:
@@ -74,15 +74,15 @@ the [Collatz conjecture](https://en.wikipedia.org/wiki/Collatz_conjecture).
You may explore this famous conjecture using this entry:
```sh
./prog 2410
./prog abfff
./prog 27f8cebf
./prog 246f8fddf
./prog 2e95ab51ffea9de
./prog e6a5c22fd7bde9f
./prog 1b7dd73a937485bf
./prog 7d3237680d190a77e53751b
./prog 302ab3d052fb87c06228d249581be0e4
./prog 2410
./prog abfff
./prog 27f8cebf
./prog 246f8fddf
./prog 2e95ab51ffea9de
./prog e6a5c22fd7bde9f
./prog 1b7dd73a937485bf
./prog 7d3237680d190a77e53751b
./prog 302ab3d052fb87c06228d249581be0e4
```
NOTE: [try.sh](try.sh) runs these for you, filtered through `less(1)`.
@@ -142,13 +142,13 @@ Interesting factoid: if you allow *negative* start values, there are
a few more cycles, each of different length:
```
−1, −2, −1
−1, −2, −1
−5, −14, −7, −20, −10, −5
−5, −14, −7, −20, −10, −5
−17, −50, −25, −74, −37, −110, −55, −164,
−82, −41, −122, −61, −182, −91, −272, −136,
−68, −34, −17
−17, −50, −25, −74, −37, −110, −55, −164,
−82, −41, −122, −61, −182, −91, −272, −136,
−68, −34, −17
```
@@ -159,16 +159,16 @@ zero-padded hex and each iteration along with a line count in decimal.
The example above looks like this (compiled with 64 bit word size):
```sh
$ ./prog 6
0000000000000006
0000000000000003 1
000000000000000A 2
0000000000000005 3
0000000000000010 4
0000000000000008 5
0000000000000004 6
0000000000000002 7
0000000000000001 8
$ ./prog 6
0000000000000006
0000000000000003 1
000000000000000A 2
0000000000000005 3
0000000000000010 4
0000000000000008 5
0000000000000004 6
0000000000000002 7
0000000000000001 8
```
The size of `n` is only limited by the argument size limit of your
@@ -176,8 +176,8 @@ shell/OS (the program implements arbitrary size `bignum`s).
To query this on your POSIX system, run
```sh
$ getconf ARG_MAX
262144
$ getconf ARG_MAX
262144
```
which reports the limit in bytes, here 256KB. This allows to test
@@ -188,12 +188,12 @@ Fear not,
to the rescue:
```sh
$ printf 'obase=16;10^100\n' | bc
1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F1000000000\
0000000000000000
$ ./prog 1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F10000000000000000000000000 \
| less
[...]
$ printf 'obase=16;10^100\n' | bc
1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F1000000000\
0000000000000000
$ ./prog 1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F10000000000000000000000000 \
| less
[...]
```
Observe how the first 100 iterations melt the zeros to the right. Can you explain
@@ -293,10 +293,10 @@ the rule "[No original
research](https://en.wikipedia.org/wiki/Wikipedia:No_original_research)"):
```
and Androgynine
xor Xenoricine
not Notanamine
tla Triletramine
and Androgynine
xor Xenoricine
not Notanamine
tla Triletramine
```
Interestingly, the TLI are the perfect mnemonics for C language source.
@@ -334,24 +334,24 @@ Another identity operation. I've done it for you already. Use this
`.indent.pro` with FreeBSD indent:
```sh
$ cat .indent.pro
-bad /* blank line after decls */
-bap /* blank line after functions */
-br /* braces on if line */
-i8 /* indent */
-l999 /* line length */
-npcs /* no space after function call names */
-npsl /* don't break procedure type */
-ut /* use tabs */
-ce /* cuddle else */
-nip /* no parameter indentation */
-di1 /* declaration indent */
-Tand
-Tmet
-Tthr
-Tpro
-Tser
-Tala
$ cat .indent.pro
-bad /* blank line after decls */
-bap /* blank line after functions */
-br /* braces on if line */
-i8 /* indent */
-l999 /* line length */
-npcs /* no space after function call names */
-npsl /* don't break procedure type */
-ut /* use tabs */
-ce /* cuddle else */
-nip /* no parameter indentation */
-di1 /* declaration indent */
-Tand
-Tmet
-Tthr
-Tpro
-Tser
-Tala
```
It looks like a perfect program should have:
@@ -384,31 +384,31 @@ Spoilers ahead. Duh!
Pseudocode, with comments matching those in the C source:
```c
/* run */
if (non-NULL and nonempty argv[1]) {
n = convert(argv[1])
print n /* 2hx */
while (n != 1) { /* one */
if (n is odd) { /* odd */
m = deep copy of n /* cpy */
n <<= 1 /* shl */
n += m /* add */
increment n /* inc */
} else { /* eve */
n >>= 1 /* shr */
/* run */
if (non-NULL and nonempty argv[1]) {
n = convert(argv[1])
print n /* 2hx */
while (n != 1) { /* one */
if (n is odd) { /* odd */
m = deep copy of n /* cpy */
n <<= 1 /* shl */
n += m /* add */
increment n /* inc */
} else { /* eve */
n >>= 1 /* shr */
}
print n /* 2hx */
}
print n /* 2hx */
}
}
}
```
`Bignum`s are represented as the two member `struct`s:
```c
typedef struct {
size_t places; /* number of places in base 2 to the power of (8*sizeof(type)) */
type *number; /* dynamically allocated memory for number */
} bignum
typedef struct {
size_t places; /* number of places in base 2 to the power of (8*sizeof(type)) */
type *number; /* dynamically allocated memory for number */
} bignum
```
@@ -439,9 +439,9 @@ crunching. Nothing stops you from executing
```sh
./prog "$(cat prog.c)" # Kind of quine?
./prog "$(cat rules guidelines)" # A jackpot? Maybe next year...
./prog "$(cat /bin/ls)" # Number cut short at first NUL byte.
./prog "$(cat prog.c)" # Kind of quine?
./prog "$(cat rules guidelines)" # A jackpot? Maybe next year...
./prog "$(cat /bin/ls)" # Number cut short at first NUL byte.
```
In a certain way, the program is character set and encoding agnostic.
@@ -474,7 +474,7 @@ checks various problems with respect to style, performance, portability
and general fishiness. To enable all checks, run
```sh
cppcheck --enable=all --force -I/usr/include -Dtyp=uint32_t prog.c
cppcheck --enable=all --force -I/usr/include -Dtyp=uint32_t prog.c
```
No issues found.
@@ -487,13 +487,13 @@ function arguments to known troublemaker functions and more. It doesn't need to
pre-process code, so can be run without the `typ` macro being defined:
```sh
$ flawfinder prog.c
Flawfinder version 1.31, (C) 2001-2014 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 169
Examining prog.c
FINAL RESULTS:
ANALYSIS SUMMARY:
No hits found.
$ flawfinder prog.c
Flawfinder version 1.31, (C) 2001-2014 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 169
Examining prog.c
FINAL RESULTS:
ANALYSIS SUMMARY:
No hits found.
```
#### valgrind
@@ -505,31 +505,31 @@ execution paths, even when it must bail out, valgrind should be happy. An early
version of my program however reported this:
```
valgrind --leak-check=full --show-leak-kinds=all ./prog 6
[...]
==14615== HEAP SUMMARY:
==14615== in use at exit: 4,096 bytes in 1 blocks
==14615== total heap usage: 4 allocs, 3 frees, 4,108 bytes allocated
==14615==
==14615== 4,096 bytes in 1 blocks are still reachable in loss record 1 of 1
==14615== at 0x4C236C0: malloc (in /usr/local/lib/valgrind/vgpreload_memcheck-amd64-freebsd.so)
==14615== by 0x4F62175: ??? (in /lib/libc.so.7)
==14615== by 0x4F62073: ??? (in /lib/libc.so.7)
==14615== by 0x4F514EE: ??? (in /lib/libc.so.7)
==14615== by 0x4F51265: vfprintf_l (in /lib/libc.so.7)
==14615== by 0x4F3E001: printf (in /lib/libc.so.7)
==14615== by 0x40101E: phe (in ./prog)
==14615== by 0x400A9F: main (in ./prog)
==14615==
==14615== LEAK SUMMARY:
==14615== definitely lost: 0 bytes in 0 blocks
==14615== indirectly lost: 0 bytes in 0 blocks
==14615== possibly lost: 0 bytes in 0 blocks
==14615== still reachable: 4,096 bytes in 1 blocks
==14615== suppressed: 0 bytes in 0 blocks
==14615==
==14615== For counts of detected and suppressed errors, rerun with: -v
==14615== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
valgrind --leak-check=full --show-leak-kinds=all ./prog 6
[...]
==14615== HEAP SUMMARY:
==14615== in use at exit: 4,096 bytes in 1 blocks
==14615== total heap usage: 4 allocs, 3 frees, 4,108 bytes allocated
==14615==
==14615== 4,096 bytes in 1 blocks are still reachable in loss record 1 of 1
==14615== at 0x4C236C0: malloc (in /usr/local/lib/valgrind/vgpreload_memcheck-amd64-freebsd.so)
==14615== by 0x4F62175: ??? (in /lib/libc.so.7)
==14615== by 0x4F62073: ??? (in /lib/libc.so.7)
==14615== by 0x4F514EE: ??? (in /lib/libc.so.7)
==14615== by 0x4F51265: vfprintf_l (in /lib/libc.so.7)
==14615== by 0x4F3E001: printf (in /lib/libc.so.7)
==14615== by 0x40101E: phe (in ./prog)
==14615== by 0x400A9F: main (in ./prog)
==14615==
==14615== LEAK SUMMARY:
==14615== definitely lost: 0 bytes in 0 blocks
==14615== indirectly lost: 0 bytes in 0 blocks
==14615== possibly lost: 0 bytes in 0 blocks
==14615== still reachable: 4,096 bytes in 1 blocks
==14615== suppressed: 0 bytes in 0 blocks
==14615==
==14615== For counts of detected and suppressed errors, rerun with: -v
==14615== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
```
From which I concluded that `printf(3)` allocated a single 4K block for
@@ -546,30 +546,30 @@ of C99 7.19.5.1, "The fclose function", was encouraging:
So I `fclose(stdout)` before returning and now:
```
valgrind --leak-check=full --show-leak-kinds=all ./prog 6
==14571== Memcheck, a memory error detector
==14571== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==14571== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==14571== Command: ./prog 6
==14571==
0000000000000006
0000000000000003 1
000000000000000A 2
0000000000000005 3
0000000000000010 4
0000000000000008 5
0000000000000004 6
0000000000000002 7
0000000000000001 8
==14571==
==14571== HEAP SUMMARY:
==14571== in use at exit: 0 bytes in 0 blocks
==14571== total heap usage: 4 allocs, 4 frees, 4,120 bytes allocated
==14571==
==14571== All heap blocks were freed -- no leaks are possible
==14571==
==14571== For counts of detected and suppressed errors, rerun with: -v
==14571== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
valgrind --leak-check=full --show-leak-kinds=all ./prog 6
==14571== Memcheck, a memory error detector
==14571== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==14571== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==14571== Command: ./prog 6
==14571==
0000000000000006
0000000000000003 1
000000000000000A 2
0000000000000005 3
0000000000000010 4
0000000000000008 5
0000000000000004 6
0000000000000002 7
0000000000000001 8
==14571==
==14571== HEAP SUMMARY:
==14571== in use at exit: 0 bytes in 0 blocks
==14571== total heap usage: 4 allocs, 4 frees, 4,120 bytes allocated
==14571==
==14571== All heap blocks were freed -- no leaks are possible
==14571==
==14571== For counts of detected and suppressed errors, rerun with: -v
==14571== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
```
A squeaky clean valgrind result!
@@ -706,7 +706,7 @@ that printing digits with `'0' + digit` is not allowed (even though
`'0'` is technically an `int`!) so I am forced to output hex digits with
```c
printf("%c", (met)tyr + 32 + 16 + ((8 + EOF) * ((met)tyr / (8 + 2))));
printf("%c", (met)tyr + 32 + 16 + ((8 + EOF) * ((met)tyr / (8 + 2))));
```
because of the "no magic numbers other than powers of two" rule. How is this
@@ -731,8 +731,8 @@ all expressions involving more than one operator, especially those for which
a cast is required, leading to hard to understand expressions such as
```c
const ser glx = (ser)((asx > (ser)64u) ? (ser)((ser)asx + (ser)8u + (ser)1u) : (ser)asx);
not.not[leu] = (and)((and)not.not[leu] | (and)(((and)glx % (and)16u) << (and)lys));
const ser glx = (ser)((asx > (ser)64u) ? (ser)((ser)asx + (ser)8u + (ser)1u) : (ser)asx);
not.not[leu] = (and)((and)not.not[leu] | (and)(((and)glx % (and)16u) << (and)lys));
```
MISRA 14.7: "A function shall have a single point of exit at the end of
@@ -748,17 +748,17 @@ information shall be tested." A cast to `void` would draw a lint warning, so
I use the `printf(3)` result in expressions,
```c
lys -= 4 * printf("%c", (met)tyr + 32 + 16 + ((8 + EOF) * ((met)tyr / (8 + 2))));
val += printf("\n") / ((__LINE__ * L_tmpnam) + TMP_MAX);
val -= (printf(" %d\n", val) > BUFSIZ) ? FILENAME_MAX : EOF;
lys -= 4 * printf("%c", (met)tyr + 32 + 16 + ((8 + EOF) * ((met)tyr / (8 + 2))));
val += printf("\n") / ((__LINE__ * L_tmpnam) + TMP_MAX);
val -= (printf(" %d\n", val) > BUFSIZ) ? FILENAME_MAX : EOF;
```
which are, in the absence of errors, equivalent to
```c
lys -= 4;
/*nop*/
++val;
lys -= 4;
/*nop*/
++val;
```
@@ -773,9 +773,9 @@ addressed object." in conjunction with lint's "Note 952: Parameter could
be declared `const`" causes `const`-poisoning for all functions,
```c
static void phe(const ala not);
static void gly(ala *const not, const and his);
met main(met val, const pro *const his[]);
static void phe(const ala not);
static void gly(ala *const not, const and his);
met main(met val, const pro *const his[]);
```
and quite a number of automatic variables.
@@ -793,17 +793,17 @@ If your compiler supports a 128 bit wide type (e.g. clang, gcc) then
you can use it via the `typ` macro:
```sh
clang -Dtyp=__uint128_t -o prog prog.c
clang -Dtyp=__uint128_t -o prog prog.c
```
Indeed, the program can use (and lints clean for) all of
```sh
clang -Dtyp=uint8_t -o prog8 prog.c
clang -Dtyp=uint16_t -o prog16 prog.c
clang -Dtyp=uint32_t -o prog32 prog.c
clang -Dtyp=uint64_t -o prog64 prog.c
clang -std=c89 -Dtyp="unsigned long" -o prog89 prog.c
clang -Dtyp=uint8_t -o prog8 prog.c
clang -Dtyp=uint16_t -o prog16 prog.c
clang -Dtyp=uint32_t -o prog32 prog.c
clang -Dtyp=uint64_t -o prog64 prog.c
clang -std=c89 -Dtyp="unsigned long" -o prog89 prog.c
```
This works because the program has no need for corresponding `SCN` or `PRI`
2015/schweikhardt/index.html
+161 -162
View File
@@ -132,8 +132,7 @@
<h2 id="author"><a name="author"></a>Author:</h2>
<ul>
<li>Name: <a href="../../authors.html#Jens_Schweikhardt">Jens Schweikhardt</a><br>
Location: <a href="../../location.html#DE">DE</a> - <em>Federal Republic of Germany</em> (<em>Germany</em>)
<br><br></li>
Location: <a href="../../location.html#DE">DE</a> - <em>Federal Republic of Germany</em> (<em>Germany</em>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,34 +141,34 @@ Location: <a href="../../location.html#DE">DE</a> - <em>Federal Republic of Germ
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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>
<pre><code> STATUS: INABIAF - please **DO NOT** fix</code></pre>
<p>For more detailed information see <a href="../../bugs.html#2015_schweikhardt">2015 schweikhardt 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> n</span></code></pre></div>
<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> n</span></code></pre></div>
<p>where n is a base 16 number of any size.</p>
<p>NOTE: although it’s supposed to be a base 16 number nothing will stop you from
doing something else. The author explains this in more details.</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>
<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>
<p>After running it once to see what commands are run, you might wish to run it a
second time and just hold down space to see a fun scroll of numbers especially
where zeroes move to the right.</p>
<h2 id="judges-remarks">Judges’ remarks:</h2>
<p>This code is clean. When you compile with all warnings enabled,
such as with clang:</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">cc</span> <span class="at">-Weverything</span> <span class="at">-pedantic</span> <span class="at">-std</span><span class="op">=</span>c11 <span class="at">-Dtyp</span><span class="op">=</span>uint64<span class="dt">\_</span>t <span class="at">-O3</span> prog.c <span class="at">-o</span> prog</span></code></pre></div>
<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">cc</span> <span class="at">-Weverything</span> <span class="at">-pedantic</span> <span class="at">-std</span><span class="op">=</span>c11 <span class="at">-Dtyp</span><span class="op">=</span>uint64<span class="dt">\_</span>t <span class="at">-O3</span> prog.c <span class="at">-o</span> prog</span></code></pre></div>
<p>The code compiles without warnings on the systems that we tested!</p>
<p>Even more, the code was 100% clean when we ran it against various
static source checkers.</p>
<p>This tool references a problem that <a href="http://members.tip.net.au/~dbell/">David I.
Bell</a> once described
as having one of the largest “yummo quotients” in number theory:</p>
<pre><code> complexity of the solution
yummo quotient = -----------------------------------
complexity of the problem statement</code></pre>
<pre><code> complexity of the solution
yummo quotient = -----------------------------------
complexity of the problem statement</code></pre>
<p><a href="https://en.wikipedia.org/wiki/Paul_Erdős">Erdős</a> privately told one of the IOCCC judges:</p>
<blockquote>
<p>Solving the <a href="https://en.wikipedia.org/wiki/Generalized_Riemann_hypothesis#Extended_Riemann_hypothesis_.28ERH.29">Generalized Riemann
@@ -178,15 +177,15 @@ would be a good warm-up exercise for someone to get ready to begin to work on
the <a href="https://en.wikipedia.org/wiki/Collatz_conjecture">Collatz conjecture</a>.</p>
</blockquote>
<p>You may explore this famous conjecture using this entry:</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="ex">./prog</span> 2410</span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> abfff</span>
<span id="cb7-3"><a href="#cb7-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> 27f8cebf</span>
<span id="cb7-4"><a href="#cb7-4" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> 246f8fddf</span>
<span id="cb7-5"><a href="#cb7-5" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> 2e95ab51ffea9de</span>
<span id="cb7-6"><a href="#cb7-6" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> e6a5c22fd7bde9f</span>
<span id="cb7-7"><a href="#cb7-7" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> 1b7dd73a937485bf</span>
<span id="cb7-8"><a href="#cb7-8" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> 7d3237680d190a77e53751b</span>
<span id="cb7-9"><a href="#cb7-9" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> 302ab3d052fb87c06228d249581be0e4</span></code></pre></div>
<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="ex">./prog</span> 2410</span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> abfff</span>
<span id="cb7-3"><a href="#cb7-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> 27f8cebf</span>
<span id="cb7-4"><a href="#cb7-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> 246f8fddf</span>
<span id="cb7-5"><a href="#cb7-5" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> 2e95ab51ffea9de</span>
<span id="cb7-6"><a href="#cb7-6" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> e6a5c22fd7bde9f</span>
<span id="cb7-7"><a href="#cb7-7" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> 1b7dd73a937485bf</span>
<span id="cb7-8"><a href="#cb7-8" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> 7d3237680d190a77e53751b</span>
<span id="cb7-9"><a href="#cb7-9" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> 302ab3d052fb87c06228d249581be0e4</span></code></pre></div>
<p>NOTE: <a href="try.sh">try.sh</a> runs these for you, filtered through <code>less(1)</code>.</p>
<p>When you first look at the source, the code looks fairly straightforward.
But look again. Like the Collatz conjecture, simplicity is deceptive!
@@ -227,45 +226,45 @@ you eventually reach <code>1</code>.</p>
<p>Continuing past one leads to the <em>cycle</em> 1, 4, 2, 1, 4, 2, 1, …
Interesting factoid: if you allow <em>negative</em> start values, there are
a few more cycles, each of different length:</p>
<pre><code>−1, −2, −1
<pre><code> −1, −2, −1
−5, −14, −7, −20, −10, −5
−5, −14, −7, −20, −10, −5
−17, −50, −25, −74, −37, −110, −55, −164,
−82, −41, −122, −61, −182, −91, −272, −136,
−68, −34, −17</code></pre>
−17, −50, −25, −74, −37, −110, −55, −164,
−82, −41, −122, −61, −182, −91, −272, −136,
−68, −34, −17</code></pre>
<p>The program computes the sequence for a given positive natural number
and stops at <code>1</code>. The number <code>n</code> is specified in hexadecimal (without <code>0x</code>
prefix) as the first argument. The program prints the given number in
zero-padded hex and each iteration along with a line count in decimal.
The example above looks like this (compiled with 64 bit word size):</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">$</span> ./prog 6</span>
<span id="cb9-2"><a href="#cb9-2" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000006</span></span>
<span id="cb9-3"><a href="#cb9-3" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000003</span> 1</span>
<span id="cb9-4"><a href="#cb9-4" aria-hidden="true" tabindex="-1"></a><span class="ex">000000000000000A</span> 2</span>
<span id="cb9-5"><a href="#cb9-5" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000005</span> 3</span>
<span id="cb9-6"><a href="#cb9-6" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000010</span> 4</span>
<span id="cb9-7"><a href="#cb9-7" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000008</span> 5</span>
<span id="cb9-8"><a href="#cb9-8" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000004</span> 6</span>
<span id="cb9-9"><a href="#cb9-9" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000002</span> 7</span>
<span id="cb9-10"><a href="#cb9-10" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000001</span> 8</span></code></pre></div>
<div class="sourceCode" id="cb9"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb9-1"><a href="#cb9-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> ./prog 6</span>
<span id="cb9-2"><a href="#cb9-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000006</span></span>
<span id="cb9-3"><a href="#cb9-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000003</span> 1</span>
<span id="cb9-4"><a href="#cb9-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">000000000000000A</span> 2</span>
<span id="cb9-5"><a href="#cb9-5" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000005</span> 3</span>
<span id="cb9-6"><a href="#cb9-6" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000010</span> 4</span>
<span id="cb9-7"><a href="#cb9-7" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000008</span> 5</span>
<span id="cb9-8"><a href="#cb9-8" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000004</span> 6</span>
<span id="cb9-9"><a href="#cb9-9" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000002</span> 7</span>
<span id="cb9-10"><a href="#cb9-10" aria-hidden="true" tabindex="-1"></a> <span class="ex">0000000000000001</span> 8</span></code></pre></div>
<p>The size of <code>n</code> is only limited by the argument size limit of your
shell/OS (the program implements arbitrary size <code>bignum</code>s).
To query this on your POSIX system, run</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">$</span> getconf ARG_MAX</span>
<span id="cb10-2"><a href="#cb10-2" aria-hidden="true" tabindex="-1"></a><span class="ex">262144</span></span></code></pre></div>
<div class="sourceCode" id="cb10"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb10-1"><a href="#cb10-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> getconf ARG_MAX</span>
<span id="cb10-2"><a href="#cb10-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">262144</span></span></code></pre></div>
<p>which reports the limit in bytes, here 256KB. This allows to test
whether a <a href="https://en.wikipedia.org/wiki/Googol">Googol</a>, which is
10<sup>100</sup>, satisfies the conjecture. But what is a googol in hex?
Fear not,
<a href="http://pubs.opengroup.org/onlinepubs/9699919799/utilities/bc.html">bc(1)</a>
to the rescue:</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">$</span> printf <span class="st">&#39;obase=16;10^100\n&#39;</span> <span class="kw">|</span> <span class="fu">bc</span></span>
<span id="cb11-2"><a href="#cb11-2" aria-hidden="true" tabindex="-1"></a><span class="ex">1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F1000000000</span><span class="dt">\</span></span>
<span id="cb11-3"><a href="#cb11-3" aria-hidden="true" tabindex="-1"></a><span class="ex">0000000000000000</span></span>
<span id="cb11-4"><a href="#cb11-4" aria-hidden="true" tabindex="-1"></a><span class="ex">$</span> ./prog 1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F10000000000000000000000000 <span class="dt">\</span></span>
<span id="cb11-5"><a href="#cb11-5" aria-hidden="true" tabindex="-1"></a><span class="kw">|</span> <span class="fu">less</span></span>
<span id="cb11-6"><a href="#cb11-6" aria-hidden="true" tabindex="-1"></a><span class="ex">[...]</span></span></code></pre></div>
<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">$</span> printf <span class="st">&#39;obase=16;10^100\n&#39;</span> <span class="kw">|</span> <span class="fu">bc</span></span>
<span id="cb11-2"><a href="#cb11-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F1000000000</span><span class="dt">\</span></span>
<span id="cb11-3"><a href="#cb11-3" aria-hidden="true" tabindex="-1"></a> 0000000000000000</span>
<span id="cb11-4"><a href="#cb11-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> ./prog 1249AD2594C37CEB0B2784C4CE0BF38ACE408E211A7CAAB24308A82E8F10000000000000000000000000 <span class="dt">\</span></span>
<span id="cb11-5"><a href="#cb11-5" aria-hidden="true" tabindex="-1"></a> <span class="kw">|</span> <span class="fu">less</span></span>
<span id="cb11-6"><a href="#cb11-6" aria-hidden="true" tabindex="-1"></a> <span class="ex">[...]</span></span></code></pre></div>
<p>Observe how the first 100 iterations melt the zeros to the right. Can you explain
why?</p>
<p>For a given <code>n</code> the program behavior is one of the following 3:</p>
@@ -350,10 +349,10 @@ acid</a>):</p>
<p>My own research results complete this list (not yet in Wikipedia due to
the rule “<a href="https://en.wikipedia.org/wiki/Wikipedia:No_original_research">No original
research</a>”):</p>
<pre><code>and Androgynine
xor Xenoricine
not Notanamine
tla Triletramine</code></pre>
<pre><code> and Androgynine
xor Xenoricine
not Notanamine
tla Triletramine</code></pre>
<p>Interestingly, the TLI are the perfect mnemonics for C language source.
For example, <code>met</code> is “<code>main()'s Exit Type</code>” (<code>int</code>), <code>ala</code> is “<code>A Large Algebraic</code>” (<code>bignum</code>), <code>ile</code> an “<code>Incremented Local Entity</code>” (index
counter), <code>gly</code> means “<code>Grow Larger memorY</code>”, <code>gln</code> is “<code>Grown Larger Now</code>”
@@ -374,24 +373,24 @@ hard, I could use <code>__LINE__</code> and <code>stdio.h</code> macros <code>EO
<h3 id="run-it-through-a-c-beautifier">Run it through a C beautifier</h3>
<p>Another identity operation. I’ve done it for you already. Use this
<code>.indent.pro</code> with FreeBSD indent:</p>
<div class="sourceCode" id="cb14"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb14-1"><a href="#cb14-1" aria-hidden="true" tabindex="-1"></a><span class="ex">$</span> cat .indent.pro</span>
<span id="cb14-2"><a href="#cb14-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">-bad</span> /<span class="pp">*</span> blank line after decls <span class="pp">*</span>/</span>
<span id="cb14-3"><a href="#cb14-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">-bap</span> /<span class="pp">*</span> blank line after functions <span class="pp">*</span>/</span>
<span id="cb14-4"><a href="#cb14-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">-br</span> /<span class="pp">*</span> braces on if line <span class="pp">*</span>/</span>
<span id="cb14-5"><a href="#cb14-5" aria-hidden="true" tabindex="-1"></a> <span class="ex">-i8</span> /<span class="pp">*</span> indent <span class="pp">*</span>/</span>
<span id="cb14-6"><a href="#cb14-6" aria-hidden="true" tabindex="-1"></a> <span class="ex">-l999</span> /<span class="pp">*</span> line length <span class="pp">*</span>/</span>
<span id="cb14-7"><a href="#cb14-7" aria-hidden="true" tabindex="-1"></a> <span class="ex">-npcs</span> /<span class="pp">*</span> no space after function call names <span class="pp">*</span>/</span>
<span id="cb14-8"><a href="#cb14-8" aria-hidden="true" tabindex="-1"></a> <span class="ex">-npsl</span> /<span class="pp">*</span> don<span class="st">&#39;t break procedure type */</span></span>
<span id="cb14-9"><a href="#cb14-9" aria-hidden="true" tabindex="-1"></a><span class="st"> -ut /* use tabs */</span></span>
<span id="cb14-10"><a href="#cb14-10" aria-hidden="true" tabindex="-1"></a><span class="st"> -ce /* cuddle else */</span></span>
<span id="cb14-11"><a href="#cb14-11" aria-hidden="true" tabindex="-1"></a><span class="st"> -nip /* no parameter indentation */</span></span>
<span id="cb14-12"><a href="#cb14-12" aria-hidden="true" tabindex="-1"></a><span class="st"> -di1 /* declaration indent */</span></span>
<span id="cb14-13"><a href="#cb14-13" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tand</span></span>
<span id="cb14-14"><a href="#cb14-14" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tmet</span></span>
<span id="cb14-15"><a href="#cb14-15" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tthr</span></span>
<span id="cb14-16"><a href="#cb14-16" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tpro</span></span>
<span id="cb14-17"><a href="#cb14-17" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tser</span></span>
<span id="cb14-18"><a href="#cb14-18" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tala</span></span></code></pre></div>
<div class="sourceCode" id="cb14"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb14-1"><a href="#cb14-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> cat .indent.pro</span>
<span id="cb14-2"><a href="#cb14-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">-bad</span> /<span class="pp">*</span> blank line after decls <span class="pp">*</span>/</span>
<span id="cb14-3"><a href="#cb14-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">-bap</span> /<span class="pp">*</span> blank line after functions <span class="pp">*</span>/</span>
<span id="cb14-4"><a href="#cb14-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">-br</span> /<span class="pp">*</span> braces on if line <span class="pp">*</span>/</span>
<span id="cb14-5"><a href="#cb14-5" aria-hidden="true" tabindex="-1"></a> <span class="ex">-i8</span> /<span class="pp">*</span> indent <span class="pp">*</span>/</span>
<span id="cb14-6"><a href="#cb14-6" aria-hidden="true" tabindex="-1"></a> <span class="ex">-l999</span> /<span class="pp">*</span> line length <span class="pp">*</span>/</span>
<span id="cb14-7"><a href="#cb14-7" aria-hidden="true" tabindex="-1"></a> <span class="ex">-npcs</span> /<span class="pp">*</span> no space after function call names <span class="pp">*</span>/</span>
<span id="cb14-8"><a href="#cb14-8" aria-hidden="true" tabindex="-1"></a> <span class="ex">-npsl</span> /<span class="pp">*</span> don<span class="st">&#39;t break procedure type */</span></span>
<span id="cb14-9"><a href="#cb14-9" aria-hidden="true" tabindex="-1"></a><span class="st"> -ut /* use tabs */</span></span>
<span id="cb14-10"><a href="#cb14-10" aria-hidden="true" tabindex="-1"></a><span class="st"> -ce /* cuddle else */</span></span>
<span id="cb14-11"><a href="#cb14-11" aria-hidden="true" tabindex="-1"></a><span class="st"> -nip /* no parameter indentation */</span></span>
<span id="cb14-12"><a href="#cb14-12" aria-hidden="true" tabindex="-1"></a><span class="st"> -di1 /* declaration indent */</span></span>
<span id="cb14-13"><a href="#cb14-13" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tand</span></span>
<span id="cb14-14"><a href="#cb14-14" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tmet</span></span>
<span id="cb14-15"><a href="#cb14-15" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tthr</span></span>
<span id="cb14-16"><a href="#cb14-16" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tpro</span></span>
<span id="cb14-17"><a href="#cb14-17" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tser</span></span>
<span id="cb14-18"><a href="#cb14-18" aria-hidden="true" tabindex="-1"></a><span class="st"> -Tala</span></span></code></pre></div>
<p>It looks like a perfect program should have:</p>
<ul>
<li>two and a half <code>#include</code>s of non-suspicious standard headers</li>
@@ -416,27 +415,27 @@ to be.</p>
<h3 id="examine-the-algorithm">Examine the algorithm</h3>
<p>Spoilers ahead. Duh!</p>
<p>Pseudocode, with comments matching those in the C source:</p>
<div class="sourceCode" id="cb15"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb15-1"><a href="#cb15-1" aria-hidden="true" tabindex="-1"></a><span class="co">/* run */</span></span>
<span id="cb15-2"><a href="#cb15-2" aria-hidden="true" tabindex="-1"></a><span class="cf">if</span> <span class="op">(</span>non<span class="op">-</span>NULL and nonempty argv<span class="op">[</span><span class="dv">1</span><span class="op">])</span> <span class="op">{</span></span>
<span id="cb15-3"><a href="#cb15-3" aria-hidden="true" tabindex="-1"></a> n <span class="op">=</span> convert<span class="op">(</span>argv<span class="op">[</span><span class="dv">1</span><span class="op">])</span></span>
<span id="cb15-4"><a href="#cb15-4" aria-hidden="true" tabindex="-1"></a> print n <span class="co">/* 2hx */</span></span>
<span id="cb15-5"><a href="#cb15-5" aria-hidden="true" tabindex="-1"></a> <span class="cf">while</span> <span class="op">(</span>n <span class="op">!=</span> <span class="dv">1</span><span class="op">)</span> <span class="op">{</span> <span class="co">/* one */</span></span>
<span id="cb15-6"><a href="#cb15-6" aria-hidden="true" tabindex="-1"></a> <span class="cf">if</span> <span class="op">(</span>n is odd<span class="op">)</span> <span class="op">{</span> <span class="co">/* odd */</span></span>
<span id="cb15-7"><a href="#cb15-7" aria-hidden="true" tabindex="-1"></a> m <span class="op">=</span> deep copy of n <span class="co">/* cpy */</span></span>
<span id="cb15-8"><a href="#cb15-8" aria-hidden="true" tabindex="-1"></a> n <span class="op">&lt;&lt;=</span> <span class="dv">1</span> <span class="co">/* shl */</span></span>
<span id="cb15-9"><a href="#cb15-9" aria-hidden="true" tabindex="-1"></a> n <span class="op">+=</span> m <span class="co">/* add */</span></span>
<span id="cb15-10"><a href="#cb15-10" aria-hidden="true" tabindex="-1"></a> increment n <span class="co">/* inc */</span></span>
<span id="cb15-11"><a href="#cb15-11" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span> <span class="cf">else</span> <span class="op">{</span> <span class="co">/* eve */</span></span>
<span id="cb15-12"><a href="#cb15-12" aria-hidden="true" tabindex="-1"></a> n <span class="op">&gt;&gt;=</span> <span class="dv">1</span> <span class="co">/* shr */</span></span>
<span id="cb15-13"><a href="#cb15-13" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span></span>
<span id="cb15-14"><a href="#cb15-14" aria-hidden="true" tabindex="-1"></a> print n <span class="co">/* 2hx */</span></span>
<span id="cb15-15"><a href="#cb15-15" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span></span>
<span id="cb15-16"><a href="#cb15-16" aria-hidden="true" tabindex="-1"></a><span class="op">}</span></span></code></pre></div>
<div class="sourceCode" id="cb15"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb15-1"><a href="#cb15-1" aria-hidden="true" tabindex="-1"></a> <span class="co">/* run */</span></span>
<span id="cb15-2"><a href="#cb15-2" aria-hidden="true" tabindex="-1"></a> <span class="cf">if</span> <span class="op">(</span>non<span class="op">-</span>NULL and nonempty argv<span class="op">[</span><span class="dv">1</span><span class="op">])</span> <span class="op">{</span></span>
<span id="cb15-3"><a href="#cb15-3" aria-hidden="true" tabindex="-1"></a> n <span class="op">=</span> convert<span class="op">(</span>argv<span class="op">[</span><span class="dv">1</span><span class="op">])</span></span>
<span id="cb15-4"><a href="#cb15-4" aria-hidden="true" tabindex="-1"></a> print n <span class="co">/* 2hx */</span></span>
<span id="cb15-5"><a href="#cb15-5" aria-hidden="true" tabindex="-1"></a> <span class="cf">while</span> <span class="op">(</span>n <span class="op">!=</span> <span class="dv">1</span><span class="op">)</span> <span class="op">{</span> <span class="co">/* one */</span></span>
<span id="cb15-6"><a href="#cb15-6" aria-hidden="true" tabindex="-1"></a> <span class="cf">if</span> <span class="op">(</span>n is odd<span class="op">)</span> <span class="op">{</span> <span class="co">/* odd */</span></span>
<span id="cb15-7"><a href="#cb15-7" aria-hidden="true" tabindex="-1"></a> m <span class="op">=</span> deep copy of n <span class="co">/* cpy */</span></span>
<span id="cb15-8"><a href="#cb15-8" aria-hidden="true" tabindex="-1"></a> n <span class="op">&lt;&lt;=</span> <span class="dv">1</span> <span class="co">/* shl */</span></span>
<span id="cb15-9"><a href="#cb15-9" aria-hidden="true" tabindex="-1"></a> n <span class="op">+=</span> m <span class="co">/* add */</span></span>
<span id="cb15-10"><a href="#cb15-10" aria-hidden="true" tabindex="-1"></a> increment n <span class="co">/* inc */</span></span>
<span id="cb15-11"><a href="#cb15-11" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span> <span class="cf">else</span> <span class="op">{</span> <span class="co">/* eve */</span></span>
<span id="cb15-12"><a href="#cb15-12" aria-hidden="true" tabindex="-1"></a> n <span class="op">&gt;&gt;=</span> <span class="dv">1</span> <span class="co">/* shr */</span></span>
<span id="cb15-13"><a href="#cb15-13" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span></span>
<span id="cb15-14"><a href="#cb15-14" aria-hidden="true" tabindex="-1"></a> print n <span class="co">/* 2hx */</span></span>
<span id="cb15-15"><a href="#cb15-15" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span></span>
<span id="cb15-16"><a href="#cb15-16" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span></span></code></pre></div>
<p><code>Bignum</code>s are represented as the two member <code>struct</code>s:</p>
<div class="sourceCode" id="cb16"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb16-1"><a href="#cb16-1" aria-hidden="true" tabindex="-1"></a><span class="kw">typedef</span> <span class="kw">struct</span> <span class="op">{</span></span>
<span id="cb16-2"><a href="#cb16-2" aria-hidden="true" tabindex="-1"></a> <span class="dt">size_t</span> places<span class="op">;</span> <span class="co">/* number of places in base 2 to the power of (8*sizeof(type)) */</span></span>
<span id="cb16-3"><a href="#cb16-3" aria-hidden="true" tabindex="-1"></a> type <span class="op">*</span>number<span class="op">;</span> <span class="co">/* dynamically allocated memory for number */</span></span>
<span id="cb16-4"><a href="#cb16-4" aria-hidden="true" tabindex="-1"></a><span class="op">}</span> bignum</span></code></pre></div>
<div class="sourceCode" id="cb16"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb16-1"><a href="#cb16-1" aria-hidden="true" tabindex="-1"></a> <span class="kw">typedef</span> <span class="kw">struct</span> <span class="op">{</span></span>
<span id="cb16-2"><a href="#cb16-2" aria-hidden="true" tabindex="-1"></a> <span class="dt">size_t</span> places<span class="op">;</span> <span class="co">/* number of places in base 2 to the power of (8*sizeof(type)) */</span></span>
<span id="cb16-3"><a href="#cb16-3" aria-hidden="true" tabindex="-1"></a> type <span class="op">*</span>number<span class="op">;</span> <span class="co">/* dynamically allocated memory for number */</span></span>
<span id="cb16-4"><a href="#cb16-4" aria-hidden="true" tabindex="-1"></a> <span class="op">}</span> bignum</span></code></pre></div>
<h3 id="compile-it-with-flags-to-enable-all-warnings">Compile it (with flags to enable all warnings)</h3>
<p>Here’s where the program shines brighter than a <a href="https://en.wikipedia.org/wiki/Gamma-ray_burst">gamma-ray
burst</a>!</p>
@@ -453,9 +452,9 @@ expected.</p>
<p>This means however, that the program accepts <strong>any string</strong>, turns it
into a starting number (which is output as the first line), and starts
crunching. Nothing stops you from executing</p>
<div class="sourceCode" id="cb17"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb17-1"><a href="#cb17-1" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot;</span><span class="va">$(</span><span class="fu">cat</span> prog.c<span class="va">)</span><span class="st">&quot;</span> <span class="co"># Kind of quine?</span></span>
<span id="cb17-2"><a href="#cb17-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot;</span><span class="va">$(</span><span class="fu">cat</span> rules guidelines<span class="va">)</span><span class="st">&quot;</span> <span class="co"># A jackpot? Maybe next year...</span></span>
<span id="cb17-3"><a href="#cb17-3" aria-hidden="true" tabindex="-1"></a><span class="ex">./prog</span> <span class="st">&quot;</span><span class="va">$(</span><span class="fu">cat</span> /bin/ls<span class="va">)</span><span class="st">&quot;</span> <span class="co"># Number cut short at first NUL byte.</span></span></code></pre></div>
<div class="sourceCode" id="cb17"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb17-1"><a href="#cb17-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> <span class="st">&quot;</span><span class="va">$(</span><span class="fu">cat</span> prog.c<span class="va">)</span><span class="st">&quot;</span> <span class="co"># Kind of quine?</span></span>
<span id="cb17-2"><a href="#cb17-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> <span class="st">&quot;</span><span class="va">$(</span><span class="fu">cat</span> rules guidelines<span class="va">)</span><span class="st">&quot;</span> <span class="co"># A jackpot? Maybe next year...</span></span>
<span id="cb17-3"><a href="#cb17-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">./prog</span> <span class="st">&quot;</span><span class="va">$(</span><span class="fu">cat</span> /bin/ls<span class="va">)</span><span class="st">&quot;</span> <span class="co"># Number cut short at first NUL byte.</span></span></code></pre></div>
<p>In a certain way, the program is character set and encoding agnostic.</p>
<h3 id="assumptions-made">Assumptions made</h3>
<ul>
@@ -476,51 +475,51 @@ use <code>8 * sizeof(typ)</code> bits per place. It does not work when <code>CHA
<p>The open source static checker <a href="http://cppcheck.sourceforge.net/">cppcheck</a>
checks various problems with respect to style, performance, portability
and general fishiness. To enable all checks, run</p>
<div class="sourceCode" id="cb18"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb18-1"><a href="#cb18-1" aria-hidden="true" tabindex="-1"></a><span class="ex">cppcheck</span> <span class="at">--enable</span><span class="op">=</span>all <span class="at">--force</span> <span class="at">-I</span>/usr/include <span class="at">-Dtyp</span><span class="op">=</span>uint32_t prog.c</span></code></pre></div>
<div class="sourceCode" id="cb18"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb18-1"><a href="#cb18-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">cppcheck</span> <span class="at">--enable</span><span class="op">=</span>all <span class="at">--force</span> <span class="at">-I</span>/usr/include <span class="at">-Dtyp</span><span class="op">=</span>uint32_t prog.c</span></code></pre></div>
<p>No issues found.</p>
<h3 id="flawfinder">flawfinder</h3>
<p>The open source static checker <a href="http://www.dwheeler.com/flawfinder/">flawfinder</a>
checks various problems with respect to security like buffer overflows,
function arguments to known troublemaker functions and more. It doesn’t need to
pre-process code, so can be run without the <code>typ</code> macro being defined:</p>
<div class="sourceCode" id="cb19"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb19-1"><a href="#cb19-1" aria-hidden="true" tabindex="-1"></a><span class="ex">$</span> flawfinder prog.c</span>
<span id="cb19-2"><a href="#cb19-2" aria-hidden="true" tabindex="-1"></a><span class="ex">Flawfinder</span> version 1.31, <span class="er">(</span><span class="ex">C</span><span class="kw">)</span> <span class="ex">2001-2014</span> David A. Wheeler.</span>
<span id="cb19-3"><a href="#cb19-3" aria-hidden="true" tabindex="-1"></a><span class="ex">Number</span> of rules <span class="er">(</span><span class="ex">primarily</span> dangerous function names<span class="kw">)</span> <span class="er">in</span> <span class="ex">C/C++</span> ruleset: 169</span>
<span id="cb19-4"><a href="#cb19-4" aria-hidden="true" tabindex="-1"></a><span class="ex">Examining</span> prog.c</span>
<span id="cb19-5"><a href="#cb19-5" aria-hidden="true" tabindex="-1"></a><span class="ex">FINAL</span> RESULTS:</span>
<span id="cb19-6"><a href="#cb19-6" aria-hidden="true" tabindex="-1"></a><span class="ex">ANALYSIS</span> SUMMARY:</span>
<span id="cb19-7"><a href="#cb19-7" aria-hidden="true" tabindex="-1"></a><span class="ex">No</span> hits found.</span></code></pre></div>
<div class="sourceCode" id="cb19"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb19-1"><a href="#cb19-1" aria-hidden="true" tabindex="-1"></a> <span class="ex">$</span> flawfinder prog.c</span>
<span id="cb19-2"><a href="#cb19-2" aria-hidden="true" tabindex="-1"></a> <span class="ex">Flawfinder</span> version 1.31, <span class="er">(</span><span class="ex">C</span><span class="kw">)</span> <span class="ex">2001-2014</span> David A. Wheeler.</span>
<span id="cb19-3"><a href="#cb19-3" aria-hidden="true" tabindex="-1"></a> <span class="ex">Number</span> of rules <span class="er">(</span><span class="ex">primarily</span> dangerous function names<span class="kw">)</span> <span class="er">in</span> <span class="ex">C/C++</span> ruleset: 169</span>
<span id="cb19-4"><a href="#cb19-4" aria-hidden="true" tabindex="-1"></a> <span class="ex">Examining</span> prog.c</span>
<span id="cb19-5"><a href="#cb19-5" aria-hidden="true" tabindex="-1"></a> <span class="ex">FINAL</span> RESULTS:</span>
<span id="cb19-6"><a href="#cb19-6" aria-hidden="true" tabindex="-1"></a> <span class="ex">ANALYSIS</span> SUMMARY:</span>
<span id="cb19-7"><a href="#cb19-7" aria-hidden="true" tabindex="-1"></a> <span class="ex">No</span> hits found.</span></code></pre></div>
<h4 id="valgrind">valgrind</h4>
<p>The open source dynamic checker <a href="http://valgrind.org/">valgrind</a> runs an
executable and verifies all memory accesses and (de)allocations for proper
bounds and memory leaks. Since the program frees all memory in all possible
execution paths, even when it must bail out, valgrind should be happy. An early
version of my program however reported this:</p>
<pre><code>valgrind --leak-check=full --show-leak-kinds=all ./prog 6
[...]
==14615== HEAP SUMMARY:
==14615== in use at exit: 4,096 bytes in 1 blocks
==14615== total heap usage: 4 allocs, 3 frees, 4,108 bytes allocated
==14615==
==14615== 4,096 bytes in 1 blocks are still reachable in loss record 1 of 1
==14615== at 0x4C236C0: malloc (in /usr/local/lib/valgrind/vgpreload_memcheck-amd64-freebsd.so)
==14615== by 0x4F62175: ??? (in /lib/libc.so.7)
==14615== by 0x4F62073: ??? (in /lib/libc.so.7)
==14615== by 0x4F514EE: ??? (in /lib/libc.so.7)
==14615== by 0x4F51265: vfprintf_l (in /lib/libc.so.7)
==14615== by 0x4F3E001: printf (in /lib/libc.so.7)
==14615== by 0x40101E: phe (in ./prog)
==14615== by 0x400A9F: main (in ./prog)
==14615==
==14615== LEAK SUMMARY:
==14615== definitely lost: 0 bytes in 0 blocks
==14615== indirectly lost: 0 bytes in 0 blocks
==14615== possibly lost: 0 bytes in 0 blocks
==14615== still reachable: 4,096 bytes in 1 blocks
==14615== suppressed: 0 bytes in 0 blocks
==14615==
==14615== For counts of detected and suppressed errors, rerun with: -v
==14615== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)</code></pre>
<pre><code> valgrind --leak-check=full --show-leak-kinds=all ./prog 6
[...]
==14615== HEAP SUMMARY:
==14615== in use at exit: 4,096 bytes in 1 blocks
==14615== total heap usage: 4 allocs, 3 frees, 4,108 bytes allocated
==14615==
==14615== 4,096 bytes in 1 blocks are still reachable in loss record 1 of 1
==14615== at 0x4C236C0: malloc (in /usr/local/lib/valgrind/vgpreload_memcheck-amd64-freebsd.so)
==14615== by 0x4F62175: ??? (in /lib/libc.so.7)
==14615== by 0x4F62073: ??? (in /lib/libc.so.7)
==14615== by 0x4F514EE: ??? (in /lib/libc.so.7)
==14615== by 0x4F51265: vfprintf_l (in /lib/libc.so.7)
==14615== by 0x4F3E001: printf (in /lib/libc.so.7)
==14615== by 0x40101E: phe (in ./prog)
==14615== by 0x400A9F: main (in ./prog)
==14615==
==14615== LEAK SUMMARY:
==14615== definitely lost: 0 bytes in 0 blocks
==14615== indirectly lost: 0 bytes in 0 blocks
==14615== possibly lost: 0 bytes in 0 blocks
==14615== still reachable: 4,096 bytes in 1 blocks
==14615== suppressed: 0 bytes in 0 blocks
==14615==
==14615== For counts of detected and suppressed errors, rerun with: -v
==14615== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)</code></pre>
<p>From which I concluded that <code>printf(3)</code> allocated a single 4K block for
which no matching <code>free(3)</code> existed. But how to free memory allocated deep
down in the guts of the Standard I/O library? After some serious head
@@ -533,30 +532,30 @@ and any buffer set by the <code>setbuf</code> or <code>setvbuf</code> function i
(and deallocated if it was automatically allocated).</p>
</blockquote>
<p>So I <code>fclose(stdout)</code> before returning and now:</p>
<pre><code>valgrind --leak-check=full --show-leak-kinds=all ./prog 6
==14571== Memcheck, a memory error detector
==14571== Copyright (C) 2002-2013, and GNU GPL&#39;d, by Julian Seward et al.
==14571== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==14571== Command: ./prog 6
==14571==
0000000000000006
0000000000000003 1
000000000000000A 2
0000000000000005 3
0000000000000010 4
0000000000000008 5
0000000000000004 6
0000000000000002 7
0000000000000001 8
==14571==
==14571== HEAP SUMMARY:
==14571== in use at exit: 0 bytes in 0 blocks
==14571== total heap usage: 4 allocs, 4 frees, 4,120 bytes allocated
==14571==
==14571== All heap blocks were freed -- no leaks are possible
==14571==
==14571== For counts of detected and suppressed errors, rerun with: -v
==14571== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)</code></pre>
<pre><code> valgrind --leak-check=full --show-leak-kinds=all ./prog 6
==14571== Memcheck, a memory error detector
==14571== Copyright (C) 2002-2013, and GNU GPL&#39;d, by Julian Seward et al.
==14571== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==14571== Command: ./prog 6
==14571==
0000000000000006
0000000000000003 1
000000000000000A 2
0000000000000005 3
0000000000000010 4
0000000000000008 5
0000000000000004 6
0000000000000002 7
0000000000000001 8
==14571==
==14571== HEAP SUMMARY:
==14571== in use at exit: 0 bytes in 0 blocks
==14571== total heap usage: 4 allocs, 4 frees, 4,120 bytes allocated
==14571==
==14571== All heap blocks were freed -- no leaks are possible
==14571==
==14571== For counts of detected and suppressed errors, rerun with: -v
==14571== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)</code></pre>
<p>A squeaky clean valgrind result!</p>
<h4 id="flexelint">FlexeLint</h4>
<p>FlexeLint is a commercial lint tool by <a href="http://www.gimpel.com/html/index.htm">Gimpel
@@ -676,7 +675,7 @@ use of character values.” This forbids using character constants in
expressions other than assignments to <code>char</code> objects. A consequence is
that printing digits with <code>'0' + digit</code> is not allowed (even though
<code>'0'</code> is technically an <code>int</code>!) so I am forced to output hex digits with</p>
<div class="sourceCode" id="cb24"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb24-1"><a href="#cb24-1" aria-hidden="true" tabindex="-1"></a>printf<span class="op">(</span><span class="st">&quot;</span><span class="sc">%c</span><span class="st">&quot;</span><span class="op">,</span> <span class="op">(</span>met<span class="op">)</span>tyr <span class="op">+</span> <span class="dv">32</span> <span class="op">+</span> <span class="dv">16</span> <span class="op">+</span> <span class="op">((</span><span class="dv">8</span> <span class="op">+</span> EOF<span class="op">)</span> <span class="op">*</span> <span class="op">((</span>met<span class="op">)</span>tyr <span class="op">/</span> <span class="op">(</span><span class="dv">8</span> <span class="op">+</span> <span class="dv">2</span><span class="op">))));</span></span></code></pre></div>
<div class="sourceCode" id="cb24"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb24-1"><a href="#cb24-1" aria-hidden="true" tabindex="-1"></a> printf<span class="op">(</span><span class="st">&quot;</span><span class="sc">%c</span><span class="st">&quot;</span><span class="op">,</span> <span class="op">(</span>met<span class="op">)</span>tyr <span class="op">+</span> <span class="dv">32</span> <span class="op">+</span> <span class="dv">16</span> <span class="op">+</span> <span class="op">((</span><span class="dv">8</span> <span class="op">+</span> EOF<span class="op">)</span> <span class="op">*</span> <span class="op">((</span>met<span class="op">)</span>tyr <span class="op">/</span> <span class="op">(</span><span class="dv">8</span> <span class="op">+</span> <span class="dv">2</span><span class="op">))));</span></span></code></pre></div>
<p>because of the “no magic numbers other than powers of two” rule. How is this
an improvement over <code>printf("%c", '0' + tyr + 7 * (tyr / 10)</code>, MISRA?</p>
<p>MISRA 6.3: “<code>typedef</code>s that indicate size and signedness should be used in
@@ -692,8 +691,8 @@ redundant casting ensues. It gets worse with the next rule…</p>
precedence rules in expressions.” This requires parentheses for almost
all expressions involving more than one operator, especially those for which
a cast is required, leading to hard to understand expressions such as</p>
<div class="sourceCode" id="cb25"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb25-1"><a href="#cb25-1" aria-hidden="true" tabindex="-1"></a><span class="dt">const</span> ser glx <span class="op">=</span> <span class="op">(</span>ser<span class="op">)((</span>asx <span class="op">&gt;</span> <span class="op">(</span>ser<span class="op">)</span><span class="dv">64</span><span class="bu">u</span><span class="op">)</span> <span class="op">?</span> <span class="op">(</span>ser<span class="op">)((</span>ser<span class="op">)</span>asx <span class="op">+</span> <span class="op">(</span>ser<span class="op">)</span><span class="dv">8</span><span class="bu">u</span> <span class="op">+</span> <span class="op">(</span>ser<span class="op">)</span><span class="dv">1</span><span class="bu">u</span><span class="op">)</span> <span class="op">:</span> <span class="op">(</span>ser<span class="op">)</span>asx<span class="op">);</span></span>
<span id="cb25-2"><a href="#cb25-2" aria-hidden="true" tabindex="-1"></a>not<span class="op">.</span>not<span class="op">[</span>leu<span class="op">]</span> <span class="op">=</span> <span class="op">(</span>and<span class="op">)((</span>and<span class="op">)</span>not<span class="op">.</span>not<span class="op">[</span>leu<span class="op">]</span> <span class="op">|</span> <span class="op">(</span>and<span class="op">)(((</span>and<span class="op">)</span>glx <span class="op">%</span> <span class="op">(</span>and<span class="op">)</span><span class="dv">16</span><span class="bu">u</span><span class="op">)</span> <span class="op">&lt;&lt;</span> <span class="op">(</span>and<span class="op">)</span>lys<span class="op">));</span></span></code></pre></div>
<div class="sourceCode" id="cb25"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb25-1"><a href="#cb25-1" aria-hidden="true" tabindex="-1"></a> <span class="dt">const</span> ser glx <span class="op">=</span> <span class="op">(</span>ser<span class="op">)((</span>asx <span class="op">&gt;</span> <span class="op">(</span>ser<span class="op">)</span><span class="dv">64</span><span class="bu">u</span><span class="op">)</span> <span class="op">?</span> <span class="op">(</span>ser<span class="op">)((</span>ser<span class="op">)</span>asx <span class="op">+</span> <span class="op">(</span>ser<span class="op">)</span><span class="dv">8</span><span class="bu">u</span> <span class="op">+</span> <span class="op">(</span>ser<span class="op">)</span><span class="dv">1</span><span class="bu">u</span><span class="op">)</span> <span class="op">:</span> <span class="op">(</span>ser<span class="op">)</span>asx<span class="op">);</span></span>
<span id="cb25-2"><a href="#cb25-2" aria-hidden="true" tabindex="-1"></a> not<span class="op">.</span>not<span class="op">[</span>leu<span class="op">]</span> <span class="op">=</span> <span class="op">(</span>and<span class="op">)((</span>and<span class="op">)</span>not<span class="op">.</span>not<span class="op">[</span>leu<span class="op">]</span> <span class="op">|</span> <span class="op">(</span>and<span class="op">)(((</span>and<span class="op">)</span>glx <span class="op">%</span> <span class="op">(</span>and<span class="op">)</span><span class="dv">16</span><span class="bu">u</span><span class="op">)</span> <span class="op">&lt;&lt;</span> <span class="op">(</span>and<span class="op">)</span>lys<span class="op">));</span></span></code></pre></div>
<p>MISRA 14.7: “A function shall have a single point of exit at the end of
the function.” Sigh. Since I must use eloquent prototypes (8.1, 16.3,
16.4) and static functions (8.10, 8.11), I can only use a few functions.
@@ -704,22 +703,22 @@ too high for a sane function.</p>
<p>MISRA 16.10: “If a function returns error information, then that error
information shall be tested.” A cast to <code>void</code> would draw a lint warning, so
I use the <code>printf(3)</code> result in expressions,</p>
<div class="sourceCode" id="cb26"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb26-1"><a href="#cb26-1" aria-hidden="true" tabindex="-1"></a>lys <span class="op">-=</span> <span class="dv">4</span> <span class="op">*</span> printf<span class="op">(</span><span class="st">&quot;</span><span class="sc">%c</span><span class="st">&quot;</span><span class="op">,</span> <span class="op">(</span>met<span class="op">)</span>tyr <span class="op">+</span> <span class="dv">32</span> <span class="op">+</span> <span class="dv">16</span> <span class="op">+</span> <span class="op">((</span><span class="dv">8</span> <span class="op">+</span> EOF<span class="op">)</span> <span class="op">*</span> <span class="op">((</span>met<span class="op">)</span>tyr <span class="op">/</span> <span class="op">(</span><span class="dv">8</span> <span class="op">+</span> <span class="dv">2</span><span class="op">))));</span></span>
<span id="cb26-2"><a href="#cb26-2" aria-hidden="true" tabindex="-1"></a>val <span class="op">+=</span> printf<span class="op">(</span><span class="st">&quot;</span><span class="sc">\n</span><span class="st">&quot;</span><span class="op">)</span> <span class="op">/</span> <span class="op">((</span>__LINE__ <span class="op">*</span> L_tmpnam<span class="op">)</span> <span class="op">+</span> TMP_MAX<span class="op">);</span></span>
<span id="cb26-3"><a href="#cb26-3" aria-hidden="true" tabindex="-1"></a>val <span class="op">-=</span> <span class="op">(</span>printf<span class="op">(</span><span class="st">&quot; </span><span class="sc">%d\n</span><span class="st">&quot;</span><span class="op">,</span> val<span class="op">)</span> <span class="op">&gt;</span> BUFSIZ<span class="op">)</span> <span class="op">?</span> FILENAME_MAX <span class="op">:</span> EOF<span class="op">;</span></span></code></pre></div>
<div class="sourceCode" id="cb26"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb26-1"><a href="#cb26-1" aria-hidden="true" tabindex="-1"></a> lys <span class="op">-=</span> <span class="dv">4</span> <span class="op">*</span> printf<span class="op">(</span><span class="st">&quot;</span><span class="sc">%c</span><span class="st">&quot;</span><span class="op">,</span> <span class="op">(</span>met<span class="op">)</span>tyr <span class="op">+</span> <span class="dv">32</span> <span class="op">+</span> <span class="dv">16</span> <span class="op">+</span> <span class="op">((</span><span class="dv">8</span> <span class="op">+</span> EOF<span class="op">)</span> <span class="op">*</span> <span class="op">((</span>met<span class="op">)</span>tyr <span class="op">/</span> <span class="op">(</span><span class="dv">8</span> <span class="op">+</span> <span class="dv">2</span><span class="op">))));</span></span>
<span id="cb26-2"><a href="#cb26-2" aria-hidden="true" tabindex="-1"></a> val <span class="op">+=</span> printf<span class="op">(</span><span class="st">&quot;</span><span class="sc">\n</span><span class="st">&quot;</span><span class="op">)</span> <span class="op">/</span> <span class="op">((</span>__LINE__ <span class="op">*</span> L_tmpnam<span class="op">)</span> <span class="op">+</span> TMP_MAX<span class="op">);</span></span>
<span id="cb26-3"><a href="#cb26-3" aria-hidden="true" tabindex="-1"></a> val <span class="op">-=</span> <span class="op">(</span>printf<span class="op">(</span><span class="st">&quot; </span><span class="sc">%d\n</span><span class="st">&quot;</span><span class="op">,</span> val<span class="op">)</span> <span class="op">&gt;</span> BUFSIZ<span class="op">)</span> <span class="op">?</span> FILENAME_MAX <span class="op">:</span> EOF<span class="op">;</span></span></code></pre></div>
<p>which are, in the absence of errors, equivalent to</p>
<div class="sourceCode" id="cb27"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb27-1"><a href="#cb27-1" aria-hidden="true" tabindex="-1"></a>lys <span class="op">-=</span> <span class="dv">4</span><span class="op">;</span></span>
<span id="cb27-2"><a href="#cb27-2" aria-hidden="true" tabindex="-1"></a><span class="co">/*nop*/</span></span>
<span id="cb27-3"><a href="#cb27-3" aria-hidden="true" tabindex="-1"></a><span class="op">++</span>val<span class="op">;</span></span></code></pre></div>
<div class="sourceCode" id="cb27"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb27-1"><a href="#cb27-1" aria-hidden="true" tabindex="-1"></a> lys <span class="op">-=</span> <span class="dv">4</span><span class="op">;</span></span>
<span id="cb27-2"><a href="#cb27-2" aria-hidden="true" tabindex="-1"></a> <span class="co">/*nop*/</span></span>
<span id="cb27-3"><a href="#cb27-3" aria-hidden="true" tabindex="-1"></a> <span class="op">++</span>val<span class="op">;</span></span></code></pre></div>
<p>MISRA 13.1: “Assignment operators shall not be used in expressions that
yield a Boolean value.” Forbids the idiomatic <code>if ((p = malloc(n)) == NULL)</code> and requires separate statements, in other words, bloat.</p>
<p>MISRA 16.7: “A pointer parameter in a function prototype should be
declared as pointer to <code>const</code> if the pointer is not used to modify the
addressed object.” in conjunction with lint’s “Note 952: Parameter could
be declared <code>const</code>” causes <code>const</code>-poisoning for all functions,</p>
<div class="sourceCode" id="cb28"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb28-1"><a href="#cb28-1" aria-hidden="true" tabindex="-1"></a><span class="dt">static</span> <span class="dt">void</span> phe<span class="op">(</span><span class="dt">const</span> ala not<span class="op">);</span></span>
<span id="cb28-2"><a href="#cb28-2" aria-hidden="true" tabindex="-1"></a><span class="dt">static</span> <span class="dt">void</span> gly<span class="op">(</span>ala <span class="op">*</span><span class="dt">const</span> not<span class="op">,</span> <span class="dt">const</span> and his<span class="op">);</span></span>
<span id="cb28-3"><a href="#cb28-3" aria-hidden="true" tabindex="-1"></a>met main<span class="op">(</span>met val<span class="op">,</span> <span class="dt">const</span> pro <span class="op">*</span><span class="dt">const</span> his<span class="op">[]);</span></span></code></pre></div>
<div class="sourceCode" id="cb28"><pre class="sourceCode c"><code class="sourceCode c"><span id="cb28-1"><a href="#cb28-1" aria-hidden="true" tabindex="-1"></a> <span class="dt">static</span> <span class="dt">void</span> phe<span class="op">(</span><span class="dt">const</span> ala not<span class="op">);</span></span>
<span id="cb28-2"><a href="#cb28-2" aria-hidden="true" tabindex="-1"></a> <span class="dt">static</span> <span class="dt">void</span> gly<span class="op">(</span>ala <span class="op">*</span><span class="dt">const</span> not<span class="op">,</span> <span class="dt">const</span> and his<span class="op">);</span></span>
<span id="cb28-3"><a href="#cb28-3" aria-hidden="true" tabindex="-1"></a> met main<span class="op">(</span>met val<span class="op">,</span> <span class="dt">const</span> pro <span class="op">*</span><span class="dt">const</span> his<span class="op">[]);</span></span></code></pre></div>
<p>and quite a number of automatic variables.</p>
<h3 id="why-the-laugh-and-throw-up-messages">Why the “laugh” and “throw up” messages?</h3>
<p>The guidelines state “We like programs that: make us laugh and/or throw
@@ -727,13 +726,13 @@ up :-) (humor really helps!)”</p>
<h3 id="if-you-have-a-128-bit-type">If you have a 128 bit type</h3>
<p>If your compiler supports a 128 bit wide type (e.g. clang, gcc) then
you can use it via the <code>typ</code> macro:</p>
<div class="sourceCode" id="cb29"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb29-1"><a href="#cb29-1" aria-hidden="true" tabindex="-1"></a><span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>__uint128_t <span class="at">-o</span> prog prog.c</span></code></pre></div>
<div class="sourceCode" id="cb29"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb29-1"><a href="#cb29-1" aria-hidden="true" tabindex="-1"></a> <span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>__uint128_t <span class="at">-o</span> prog prog.c</span></code></pre></div>
<p>Indeed, the program can use (and lints clean for) all of</p>
<div class="sourceCode" id="cb30"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb30-1"><a href="#cb30-1" aria-hidden="true" tabindex="-1"></a><span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint8_t <span class="at">-o</span> prog8 prog.c</span>
<span id="cb30-2"><a href="#cb30-2" aria-hidden="true" tabindex="-1"></a><span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint16_t <span class="at">-o</span> prog16 prog.c</span>
<span id="cb30-3"><a href="#cb30-3" aria-hidden="true" tabindex="-1"></a><span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint32_t <span class="at">-o</span> prog32 prog.c</span>
<span id="cb30-4"><a href="#cb30-4" aria-hidden="true" tabindex="-1"></a><span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint64_t <span class="at">-o</span> prog64 prog.c</span>
<span id="cb30-5"><a href="#cb30-5" aria-hidden="true" tabindex="-1"></a><span class="fu">clang</span> <span class="at">-std</span><span class="op">=</span>c89 <span class="at">-Dtyp</span><span class="op">=</span><span class="st">&quot;unsigned long&quot;</span> <span class="at">-o</span> prog89 prog.c</span></code></pre></div>
<div class="sourceCode" id="cb30"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb30-1"><a href="#cb30-1" aria-hidden="true" tabindex="-1"></a> <span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint8_t <span class="at">-o</span> prog8 prog.c</span>
<span id="cb30-2"><a href="#cb30-2" aria-hidden="true" tabindex="-1"></a> <span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint16_t <span class="at">-o</span> prog16 prog.c</span>
<span id="cb30-3"><a href="#cb30-3" aria-hidden="true" tabindex="-1"></a> <span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint32_t <span class="at">-o</span> prog32 prog.c</span>
<span id="cb30-4"><a href="#cb30-4" aria-hidden="true" tabindex="-1"></a> <span class="fu">clang</span> <span class="at">-Dtyp</span><span class="op">=</span>uint64_t <span class="at">-o</span> prog64 prog.c</span>
<span id="cb30-5"><a href="#cb30-5" aria-hidden="true" tabindex="-1"></a> <span class="fu">clang</span> <span class="at">-std</span><span class="op">=</span>c89 <span class="at">-Dtyp</span><span class="op">=</span><span class="st">&quot;unsigned long&quot;</span> <span class="at">-o</span> prog89 prog.c</span></code></pre></div>
<p>This works because the program has no need for corresponding <code>SCN</code> or <code>PRI</code>
macros to do the scanning and printing of variables of these types. With a 128
bit type the program can represent numbers up to
2015/yang/README.md
+13 -13
View File
@@ -1,21 +1,21 @@
## To build:
```sh
make
make
```
## To use:
```sh
echo Some text | ./prog
echo Some text | ./prog
```
## Try:
```sh
./try.sh
./try.sh
```
@@ -38,24 +38,24 @@ so you need not worry about this.
her some input through `stdin` to get lots of sea star patterns on `stdout`.
```sh
cc -O3 -std=c90 fuuko.c -lm -o fuuko_c90
echo IOCCC | ./fuuko_c90 > output_c90.c
cc -O3 -std=c90 fuuko.c -lm -o fuuko_c90
echo IOCCC | ./fuuko_c90 > output_c90.c
```
If you compile with a C99 compiler instead of C90, the sea stars will
have eyes.
```sh
cc -O3 -std=c99 fuuko.c -lm -o fuuko_c99
echo IOCCC | ./fuuko_c99 > output_c99.c
cc -O3 -std=c99 fuuko.c -lm -o fuuko_c99
echo IOCCC | ./fuuko_c99 > output_c99.c
```
Don't like [sea stars](https://en.wikipedia.org/wiki/Starfish)? Use a C++98
compiler to get a [dango](https://en.wikipedia.org/wiki/Dango) instead.
```sh
g++ -O3 -std=c++98 fuuko.c -lm -o fuuko_cpp98
echo IOCCC | ./fuuko_cpp98 > output_cpp98.c
g++ -O3 -std=c++98 fuuko.c -lm -o fuuko_cpp98
echo IOCCC | ./fuuko_cpp98 > output_cpp98.c
```
Don't like [dango](https://en.wikipedia.org/wiki/Dango) either? Use a C++11
@@ -64,16 +64,16 @@ cheese](https://en.wikipedia.org/wiki/Swiss_cheeses_and_dairy_products), if you
prefer that).
```sh
g++ -O3 -std=c++11 fuuko.c -lm -o fuuko_cpp11
echo IOCCC | ./fuuko_cpp11 > output_cpp11.c
g++ -O3 -std=c++11 fuuko.c -lm -o fuuko_cpp11
echo IOCCC | ./fuuko_cpp11 > output_cpp11.c
```
Don't like any of these patterns? Use a C11 compiler and there will be
no extra pattern.
```sh
cc -O3 -std=c11 fuuko.c -lm -o fuuko_c11
echo IOCCC | ./fuuko_c11 > output_c11.c
cc -O3 -std=c11 fuuko.c -lm -o fuuko_c11
echo IOCCC | ./fuuko_c11 > output_c11.c
```
Regardless of which of these C/C++ dialects you choose, the output
2015/yang/index.html
+14 -15
View File
@@ -132,8 +132,7 @@
<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>)</li>
</ul>
<!-- END: next line ends content generated by: bin/output-index-author.sh -->
@@ -142,11 +141,11 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
<h2 id="to-build">To build:</h2>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="fu">make</span></span></code></pre></div>
<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="bu">echo</span> Some text <span class="kw">|</span> <span class="ex">./prog</span></span></code></pre></div>
<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="bu">echo</span> Some text <span class="kw">|</span> <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>
<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>Before analysing the code in detail we were able to guess two out of four tests
this entry uses to tell the 5 languages/flavors apart. Can you find all four?</p>
@@ -158,26 +157,26 @@ so you need not worry about this.</p>
<h2 id="authors-remarks">Author’s remarks:</h2>
<p><code>Fuuko</code> is a <a href="https://en.wikipedia.org/wiki/Starfish">sea star</a> generator. Feed
her some input through <code>stdin</code> to get lots of sea star patterns on <code>stdout</code>.</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">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c90 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_c90</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_c90</span> <span class="op">&gt;</span> output_c90.c</span></code></pre></div>
<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">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c90 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_c90</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a> <span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_c90</span> <span class="op">&gt;</span> output_c90.c</span></code></pre></div>
<p>If you compile with a C99 compiler instead of C90, the sea stars will
have eyes.</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">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c99 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_c99</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_c99</span> <span class="op">&gt;</span> output_c99.c</span></code></pre></div>
<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">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c99 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_c99</span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a> <span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_c99</span> <span class="op">&gt;</span> output_c99.c</span></code></pre></div>
<p>Don’t like <a href="https://en.wikipedia.org/wiki/Starfish">sea stars</a>? Use a C++98
compiler to get a <a href="https://en.wikipedia.org/wiki/Dango">dango</a> instead.</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="ex">g++</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c++98 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_cpp98</span>
<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_cpp98</span> <span class="op">&gt;</span> output_cpp98.c</span></code></pre></div>
<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="ex">g++</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c++98 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_cpp98</span>
<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a> <span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_cpp98</span> <span class="op">&gt;</span> output_cpp98.c</span></code></pre></div>
<p>Don’t like <a href="https://en.wikipedia.org/wiki/Dango">dango</a> either? Use a C++11
compiler to get just <a href="https://en.wikipedia.org/wiki/Circle">circles</a> (or <a href="https://en.wikipedia.org/wiki/Swiss_cheeses_and_dairy_products">Swiss
cheese</a>, if you
prefer that).</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="ex">g++</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c++11 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_cpp11</span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_cpp11</span> <span class="op">&gt;</span> output_cpp11.c</span></code></pre></div>
<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="ex">g++</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c++11 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_cpp11</span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a> <span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_cpp11</span> <span class="op">&gt;</span> output_cpp11.c</span></code></pre></div>
<p>Don’t like any of these patterns? Use a C11 compiler and there will be
no extra pattern.</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">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c11 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_c11</span>
<span id="cb8-2"><a href="#cb8-2" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_c11</span> <span class="op">&gt;</span> output_c11.c</span></code></pre></div>
<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">cc</span> <span class="at">-O3</span> <span class="at">-std</span><span class="op">=</span>c11 fuuko.c <span class="at">-lm</span> <span class="at">-o</span> fuuko_c11</span>
<span id="cb8-2"><a href="#cb8-2" aria-hidden="true" tabindex="-1"></a> <span class="bu">echo</span> IOCCC <span class="kw">|</span> <span class="ex">./fuuko_c11</span> <span class="op">&gt;</span> output_c11.c</span></code></pre></div>
<p>Regardless of which of these C/C++ dialects you choose, the output
will all be valid C90 code that reproduces original input on <code>stdout</code>,
filled with pointer dereferences (C stars).</p>