Created `quick-start.md` to hold the FAQ 0.0 content. Used `sgit(1)` to change: * faq.html#enter ==> quick-start.html#enter * faq.html#enter_questions ==> quick-start.html#enter_questions * faq.html#step_0 ==> quick-start.html#step_0 * faq.html#step_1 ==> quick-start.html#step_1 * faq.html#step_2 ==> quick-start.html#step_2 * faq.html#register ==> quick-start.html#register * faq.html#step_3 ==> quick-start.html#step_3 * faq.html#step_4 ==> quick-start.html#step_4 * faq.html#step_5 ==> quick-start.html#step_5 * faq.html#step_6 ==> quick-start.html#step_6 * faq.html#step_7 ==> quick-start.html#step_7 * faq.html#step_submit ==> quick-start.html#step_submit Via: ```sh sgit -e 's/faq\.html#enter/quick-start.html#enter/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#enter_questions/quick-start.html#enter_questions/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_0/quick-start.html#step_0/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_1/quick-start.html#step_1/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_2/quick-start.html#step_2/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#register/quick-start.html#register/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_3/quick-start.html#step_3/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_4/quick-start.html#step_4/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_5/quick-start.html#step_5/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_6/quick-start.html#step_6/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_7/quick-start.html#step_7/g' '*.md' '*.hdr' 'inc/*.html' sgit -e 's/faq\.html#step_submit/quick-start.html#step_submit/g' '*.md' '*.hdr' 'inc/*.html' ``` The former FAQ 0.0 section in `faq.html` now just refers to `quick-start.html`. Modified menu and non-JS menu so that "Enter the IOCCC" refers to `quick-start.html`. Changed `bin/gen-top-html.sh` VERSION from "1.4.10 2024-11-23" to "1.4.11 2025-01-09". Performed `make www` on macOS to complete the above.
660 lines
26 KiB
HTML
660 lines
26 KiB
HTML
<!DOCTYPE html>
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Winning entries
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<a href="../../authors.html" class="sub-item-link">
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Winning authors
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Updating author info
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News
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Contest status
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Rules and guidelines
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Markdown guidelines
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<span class="item-header">
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FAQ
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<a href="../../faq.html" class="sub-item-link">
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Frequently Asked Questions
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</div>
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<div class="outfit-font">
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<a href="../../quick-start.html#enter" class="sub-item-link">
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Enter the IOCCC
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<a href="../../faq.html#compiling" class="sub-item-link">
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Compiling entries
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<a href="../../faq.html#running_entries" class="sub-item-link">
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Running entries
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About the IOCCC
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Entries
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Winning entries
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Winning authors
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Location of authors
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Bugs and (mis)features
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</a>
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<a class="mobile-submenu-item" href="../../faq.html#fix_an_entry">
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Fixing entries
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</a>
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<a class="mobile-submenu-item" href="../../faq.html#fix_author">
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Updating author info
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</a>
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<a class="mobile-submenu-item" href="../../thanks-for-help.html">
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Thanks for the help
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</a>
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</div>
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</div>
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<div class="mobile-menu-wrapper">
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<div class="mobile-menu-item">
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Status
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</div>
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<div class="mobile-submenu-wrapper">
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<a class="mobile-submenu-item" href="../../news.html">
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News
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</a>
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<a class="mobile-submenu-item" href="../../status.html">
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Contest status
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</a>
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<a class="mobile-submenu-item" href="../../next/index.html">
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Rules and guidelines
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</a>
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<a class="mobile-submenu-item" href="../../markdown.html">
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Markdown guidelines
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</a>
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<a class="mobile-submenu-item" href="../../SECURITY.html">
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Security policy
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</a>
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</div>
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</div>
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<div class="mobile-menu-wrapper">
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FAQ
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</div>
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<div class="mobile-submenu-wrapper">
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<a class="mobile-submenu-item" href="../../faq.html">
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Frequently Asked Questions
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</a>
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<a class="mobile-submenu-item" href="../../quick-start.html#enter">
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Enter the IOCCC
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</a>
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<a class="mobile-submenu-item" href="../../faq.html#compiling">
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Compiling entries
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</a>
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<a class="mobile-submenu-item" href="../../faq.html#running_entries">
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Running entries
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</a>
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<a class="mobile-submenu-item" href="../../faq.html#help">
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How to help
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</a>
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</div>
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</div>
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<div class="mobile-menu-wrapper">
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<div class="mobile-menu-item">
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About
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</div>
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<a class="mobile-submenu-item" href="../../index.html">
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Home page
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<a class="mobile-submenu-item" href="../../about.html">
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About the IOCCC
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</a>
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<a class="mobile-submenu-item" href="../../judges.html">
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The Judges
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</a>
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<a class="mobile-submenu-item" href="../../contact.html">
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Contact us
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</a>
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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<script>
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var headerOpenMenuButton = document.getElementById("header-open-menu-button");
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var headerCloseMenuButton = document.getElementById("header-close-menu-button");
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var mobileMenuPanel = document.getElementById("mobile-menu-panel");
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headerOpenMenuButton.addEventListener("click", () => {
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headerOpenMenuButton.classList.remove("topbar-mobile-menu");
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headerOpenMenuButton.classList.add("hide-content");
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headerCloseMenuButton.classList.remove("hide-content");
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headerCloseMenuButton.classList.add("topbar-mobile-menu");
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mobileMenuPanel.classList.remove("hide-content");
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mobileMenuPanel.classList.add("topbar-mobile-panel");
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});
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headerCloseMenuButton.addEventListener("click", () => {
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headerCloseMenuButton.classList.remove("topbar-mobile-menu");
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headerCloseMenuButton.classList.add("hide-content");
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mobileMenuPanel.classList.add("hide-content");
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mobileMenuPanel.classList.remove("topbar-mobile-panel");
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headerOpenMenuButton.classList.add("topbar-mobile-menu");
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headerOpenMenuButton.classList.remove("hide-content");
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});
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</script>
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<!-- END: this line ends content from: inc/topbar.default.html -->
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<!-- START: this line starts content from: inc/header.default.html -->
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<div class="header">
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<a href="../../2011/zucker/index.html">
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<img src="../../png/ioccc.png"
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alt="IOCCC image by Matt Zucker"
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width=300
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height=110>
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</a>
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<h1>The International Obfuscated C Code Contest</h1>
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<h2>2012/hou - Most useful obfuscation</h2>
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<h3>Syntax highlighter</h3>
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</div>
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<!-- END: this line ends content from: inc/header.default.html -->
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<!-- START: this line starts content from: inc/navbar.mid.html -->
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<div class="navbar">
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<a class="Left" href="../hamano/index.html">← 2012/hamano</a>
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<a class="Left" href="../index.html">↑ 2012 ↑</a>
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<a class="Left" href="../kang/index.html">2012/kang →</a>
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<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2012/hou/hou.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/winner/blob/master/2012/hou/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2012%2Fhou%2Findex.html">✓</a>
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</div>
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<!-- END: this line ends content from: inc/navbar.mid.html -->
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<div class="content" id="content">
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<h2 id="author">Author:</h2>
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<ul>
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<li>Name: <a href="../../authors.html#Qiming_HOU">Qiming HOU</a><br>
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Location: <a href="../../location.html#CN">CN</a> - <em>People’s Republic of China</em> (<em>China</em>)</li>
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</ul>
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<!-- BEFORE: 1st line of markdown file: 2012/hou/README.md -->
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<h2 id="to-build">To build:</h2>
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<pre><code> make</code></pre>
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<h2 id="to-use">To use:</h2>
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<pre><code> ./hou syntax-file file-to-process</code></pre>
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<h2 id="try">Try:</h2>
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<pre><code> ./try.sh</code></pre>
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<p>View the <code>remarks.htm</code> file in your web browser.</p>
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<p>The result is best viewed in a 80x25 console with ANSI colors.</p>
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<h2 id="try-windows">Try (Windows):</h2>
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<pre><code> copy header.htm hou.htm /y
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hou html.txt hou.c >> hou.htm
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start hou.htm</code></pre>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<p>What a versatile entry! It can be used to check the size of IOCCC entries <em>and</em>
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to publish them as HTML.</p>
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<p>For extra credit: what is the meaning of the number <code>2321237</code>?</p>
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<h2 id="authors-remarks">Author’s remarks:</h2>
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<h3 id="disclaimer">Disclaimer</h3>
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<p>The reviewer may have already noticed that the 2nd page of this program is a
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||
dense blob, which is discouraged by the contest rules. We wish to point out that
|
||
a majority of state-of-art programming editors support syntax highlighting,
|
||
which should be enabled when reading this entry. Anticipating that the
|
||
reviewer’s preferred color setting may produce a suboptimal visual effect, a few
|
||
syntax files is provided to highlight the source code under an author-provided
|
||
setting, using the submitted program itself. Syntax highlighting would also
|
||
visually improve the 3rd page.</p>
|
||
<p>The code may throw a few warnings due to formatting constraints. The author did
|
||
try to remove warnings under gcc and Visual Studio, though.</p>
|
||
<p>The author does not own the original anime series where the embedded ASCII arts
|
||
come from. For comparison, original non-ASCII art depictions of the relevant
|
||
characters and objects can be found by googling the embedded text messages.</p>
|
||
<h3 id="syntax-files">Syntax files</h3>
|
||
<p>The syntax file consists of a number of rewriting rules. Each rule consists of a
|
||
regular expression, a space, a format string, and a newline. All text matching
|
||
the regular expression would be replaced by the format string. In case of a
|
||
conflict, rules appearing earlier would take precedence. One can refer to the
|
||
original text in the format string using <code>%s</code>. Other <code>%</code> characters in the
|
||
format string must be escaped with another <code>%</code>. The space character can be used
|
||
in the regular expression by escaping it with <code>[]</code> or <code>""</code>.</p>
|
||
<p>The following regular expression operators are supported:</p>
|
||
<pre><code> () [] * + ? | ""</code></pre>
|
||
<p>For example, one can use the following expression to match a certain declaration
|
||
statement in <a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/hou.c">hou.c</a>:</p>
|
||
<pre><code> "char"[ *]*[a-zA-Z_][0-9a-zA-Z_]*[ ]*((=[0-9a-zA-Z_ ]+)|(\[[0-9a-zA-Z_ ]*\]))?[ ]*(,[ *]*[a-zA-Z_][0-9a-zA-Z_]*[ ]*((=[0-9a-zA-Z_ ]+)|(\[[0-9a-zA-Z_ ]*\]))?[ ]*)*;</code></pre>
|
||
<p>The regex engine is also algorithmically efficient. To illustrate the point,
|
||
<a href="ansi.txt">ansi.txt</a> contains a pathological expression <a href="#fn1" class="footnote-ref" id="fnref1" role="doc-noteref"><sup>1</sup></a> that guarantees a
|
||
hang for the competing Perl engine while matching itself. Try to compare these
|
||
two engines:</p>
|
||
<pre><code> ./hou ansi.txt ansi.txt
|
||
perl patho.pl < ansi.txt</code></pre>
|
||
<h3 id="limitations">Limitations</h3>
|
||
<p>Finally, there are a few limitations…</p>
|
||
<ul>
|
||
<li>The only escape sequence supported is <code>\n</code> and it doesn’t work in <code>[]</code>.</li>
|
||
<li>The maximum file/rule size is a linear function of the hard-coded constant <code>M</code>.</li>
|
||
<li>Single-character matches at the end of file may be missed.</li>
|
||
<li>The operator <code>|</code> doesn’t obey precedence rules and some extra <code>()</code>s may be required.</li>
|
||
<li>Incorrect syntax files are not tolerated.</li>
|
||
<li>The program relies on ASCII.</li>
|
||
</ul>
|
||
<h3 id="why-obfuscated">Why obfuscated</h3>
|
||
<p>The first layer of obfuscation comes from the challenge of embedding a large
|
||
ASCII art in a dense blob. The entire art is composed using only keywords,
|
||
strings and character constants. That results in a number of otherwise useless
|
||
<code>#define</code>s and quite a number of unconventionally written constants. While the
|
||
preprocessor may remove the former, the later would remain regardless of
|
||
beautification and preprocessing.</p>
|
||
<p>The second layer of obfuscation comes from the need to squeeze a reasonably
|
||
powerful regex engine into the remaining area that isn’t occupied by excessive
|
||
keywords and useless constants. To achieve this, the regex compiler is written
|
||
using the same threaded virtual machine <a href="#fn2" class="footnote-ref" id="fnref2" role="doc-noteref"><sup>2</sup></a> that parses the regex. Due to
|
||
compiler limitations, the generated VM code also ends up obscured by a large
|
||
amount of spaghetti branches and virtual thread creations. Finally, the VM in
|
||
<a href="#fn3" class="footnote-ref" id="fnref3" role="doc-noteref"><sup>3</sup></a> is extended to track multiple expression matches for the actual formatting.</p>
|
||
<p>As an extra tweak, the text message actually does something useful. Remove the
|
||
“Make a contract with me” catch line and the program would cease to function.</p>
|
||
<h3 id="references">References</h3>
|
||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
<!-- AFTER: last line of markdown file: 2012/hou/README.md -->
|
||
<hr style="width:10%;text-align:left;margin-left:0">
|
||
<section id="footnotes" class="footnotes footnotes-end-of-document" role="doc-endnotes">
|
||
<h5>Footnotes</h5>
|
||
<ol>
|
||
<li id="fn1"><p><a href="http://swtch.com/~rsc/regexp/regexp1.html">Regular Expression Matching Can Be Simple And Fast (but is slow in Java, Perl, PHP, Python, Ruby, …)</a><a href="#fnref1" class="footnote-back" role="doc-backlink">↩︎</a></p></li>
|
||
<li id="fn2"><p><a href="http://swtch.com/~rsc/regexp/regexp2.html">Russ Cox, Regular Expression Matching: the Virtual Machine Approach</a><a href="#fnref2" class="footnote-back" role="doc-backlink">↩︎</a></p></li>
|
||
<li id="fn3"><p><a href="http://swtch.com/~rsc/regexp/regexp2.html">Russ Cox, Regular Expression Matching: the Virtual Machine Approach</a><a href="#fnref3" class="footnote-back" role="doc-backlink">↩︎</a></p></li>
|
||
</ol>
|
||
</section>
|
||
|
||
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|
||
|
||
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||
|
||
<div id="inventory">
|
||
<h1 id="inventory-for-2012hou">Inventory for 2012/hou</h1>
|
||
</div>
|
||
<h2 id="primary-files">Primary files</h2>
|
||
<ul>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/hou.c">hou.c</a> - entry source code</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/Makefile">Makefile</a> - entry Makefile</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/hou.orig.c">hou.orig.c</a> - original source code</li>
|
||
<li><a href="ansi.txt">ansi.txt</a> - sample input with a pathological expression</li>
|
||
<li><a href="chk.txt">chk.txt</a> - sample input</li>
|
||
<li><a href="hint.html">hint.html</a> - hint document</li>
|
||
<li><a href="html.txt">html.txt</a> - sample input</li>
|
||
<li><a href="markdown.txt">markdown.txt</a> - sample input</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/patho.pl">patho.pl</a> - perl program - takes a long time to process ansi.txt</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/try.sh">try.sh</a> - script to try entry</li>
|
||
<li><a href="header.htm">header.htm</a> - HTML header</li>
|
||
<li><a href="perl-notes.txt">perl-notes.txt</a> - time command diff of patho.pl and prog</li>
|
||
</ul>
|
||
<h2 id="secondary-files">Secondary files</h2>
|
||
<ul>
|
||
<li><a href="2012_hou.tar.bz2">2012_hou.tar.bz2</a> - download entry tarball</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/README.md">README.md</a> - markdown source for this web page</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/hint.md">hint.md</a> - markdown source for hint.html</li>
|
||
<li><a href="https://github.com/ioccc-src/winner/blob/master/2012/hou/.path">.path</a> - directory path from top level directory</li>
|
||
<li><a href="index.html">index.html</a> - this web page</li>
|
||
</ul>
|
||
<hr style="width:10%;text-align:left;margin-left:0">
|
||
<h4>
|
||
Jump to: <a href="#">top</a>
|
||
</h4>
|
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</div>
|
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|
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|
||
|
||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
|
||
<div class="footer">
|
||
|
||
<div id="copyright"><h3>Copyright © 1984-2024 by Landon Curt Noll:
|
||
<a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">Some Rights Reserved</a></h3>
|
||
<p>
|
||
This work is <b>licensed by Landon Curt Noll</b> under
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
|
||
target="_blank"
|
||
rel="license noopener noreferrer"
|
||
style="display:inline-block;">CC BY-SA 4.0</a></b>.
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/cc.png"
|
||
alt="cc inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/by.png"
|
||
alt="person inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/sa.png"
|
||
alt="arrow looping back on itself inside circle symbol"><br>
|
||
You should <b>carefully review</b> the
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">CC BY-SA 4.0 LEGAL CODE</a></b>
|
||
before using the licensed material.<br>
|
||
You may wish to review the
|
||
<b><a href="../../license.html"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">highlights of some of the key features and terms</a></b>
|
||
of <b>CC BY-SA 4.0</b>.<br>
|
||
</p>
|
||
</div>
|
||
|
||
<div id="coda"><h3>Coda</h3>
|
||
<p>
|
||
<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2012%2Fhou%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
|
||
<a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a><br>
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</p>
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</div>
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