Landon Curt Noll
f29b37e49a
Prepare for the winners of **IOCCC28**. > However these are not the 2024 droids you are looking for. :-) The HTML menu (both JavaScript and non-JavaScript) has been updated. The `Status -> Rules and guidelines' have been replaced with two separate menus `Status -> IOCCC rules` and `Status -> IOCCC guidelines`. Added a new top level `social.html` page: built from a new `social.md`. Sorted rules for building specific web pages in the top level `Makefile`. Added `make social` to make the `social.html` page from `social.md`. The `bin/gen-top-html.sh` now is able to process a argument of **social** to process the new top level `social.html` page. Changed `bin/gen-top-html.sh` VERSION from "2.0.0 2025-03-13" to "2.0.1 2025-07-25". Below `About -> Home page` a new `About -> IOCCC social media` menu item as added. Because the menu change touched every HTML file, we changed the general copyright date range for HTML files from "1984-2024" to "1984-2025" due to the extensive changes made for **IOCCC28**. Those markdown files that were modified in 2025 had their copyright date range also changed from "1984-2024" to "1984-2025". Rebuilt tarballs and sitemap due to the extensive HTML rebuilding. Ran `make update` to perform the above.
559 lines
18 KiB
HTML
559 lines
18 KiB
HTML
<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
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<title>The International Obfuscated C Code Contest</title>
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<link rel="icon" type="image/x-icon" href="../../../favicon.ico">
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<meta name="description" content="index.md for 2020/endoh2">
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<meta name="keywords" content="IOCCC, 2020/endoh2, index.md">
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<!-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
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<!-- !!! Do not modify this web page, instead modify the file: 2020/endoh2/obfuscation/index.md !!! -->
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<!-- Markdown content was converted into HTML via the tool: bin/md2html.sh -->
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<body>
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<div class="theader">
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<nav class="topbar">
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<div class="container">
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<div class="logo">
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<a href="../../../index.html" class="logo-link">
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IOCCC
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</a>
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</div>
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<div class="topbar-items">
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<div class="item">
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<span class="item-header">
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Entries
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</span>
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<div class="sub-item">
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<div class="outfit-font">
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<a href="../../../years.html" class="sub-item-link">
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Winning entries
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../authors.html" class="sub-item-link">
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Winning authors
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../location.html" class="sub-item-link">
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Location of authors
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../bugs.html" class="sub-item-link">
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Bugs and (mis)features
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../faq.html#fix_an_entry" class="sub-item-link">
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Fixing entries
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../faq.html#fix_author" class="sub-item-link">
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Updating author info
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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 class="item">
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<span class="item-header">
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Status
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</span>
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<div class="sub-item">
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<div class="outfit-font">
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<a href="../../../news.html" class="sub-item-link">
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News
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../status.html" class="sub-item-link">
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Contest status
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../next/rules.html" class="sub-item-link">
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IOCCC rules
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../next/guidelines.html" class="sub-item-link">
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IOCCC guidelines
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../markdown.html" class="sub-item-link">
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Markdown guidelines
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</div>
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<div class="outfit-font">
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<a href="../../../SECURITY.html" class="sub-item-link">
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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>
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<div class="item">
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<span class="item-header">
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FAQ
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</span>
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<div class="sub-item">
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<div class="outfit-font">
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<a href="../../../faq.html" class="sub-item-link">
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Frequently asked questions
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</a>
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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>
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</div>
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<div class="outfit-font">
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<a href="../../../faq.html#compiling" class="sub-item-link">
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Compiling entries
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../faq.html#running_entries" class="sub-item-link">
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Running entries
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<div class="outfit-font">
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<a href="../../../faq.html#help" class="sub-item-link">
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How to help
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<div class="item">
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<span class="item-header">
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About
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<div class="outfit-font">
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<a href="../../../index.html" class="sub-item-link">
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Home page
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<div class="outfit-font">
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<a href="../../../social.html" class="sub-item-link">
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IOCCC social media
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../about.html" class="sub-item-link">
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About the IOCCC
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../judges.html" class="sub-item-link">
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The judges
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</a>
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</div>
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<div class="outfit-font">
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<a href="../../../thanks-for-help.html" class="sub-item-link">
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Thanks for the help
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<div class="outfit-font">
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<a href="../../../contact.html" class="sub-item-link">
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Contact us
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</nav>
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<div class="header-mobile-menu">
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<noscript>
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<a href="../../../nojs-menu.html" class="topbar-js-label">
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Please Enable JavaScript
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<button id="header-open-menu-button" class="topbar-mobile-menu">
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<img
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src="../../../png/hamburger-icon-open.png"
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alt="hamburger style menu icon - open state"
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width=48
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height=48>
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</button>
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<button id="header-close-menu-button" class="hide-content">
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<img
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src="../../../png/hamburger-icon-closed.png"
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alt="hamburger style menu icon - closed state"
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width=48
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</button>
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<div id="mobile-menu-panel" class="hide-content">
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<div class="mobile-menu-container">
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<div class="mobile-menu-wrapper">
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<div class="mobile-menu-item">
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Entries
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</div>
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<div class="mobile-submenu-wrapper">
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<a class="mobile-submenu-item" href="../../../years.html">
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Winning entries
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</a>
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<a class="mobile-submenu-item" href="../../../authors.html">
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Winning authors
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</a>
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<a class="mobile-submenu-item" href="../../../location.html">
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Location of authors
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</a>
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<a class="mobile-submenu-item" href="../../../bugs.html">
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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/rules.html">
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IOCCC rules
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</a>
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<a class="mobile-submenu-item" href="../../../next/guidelines.html">
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IOCCC 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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<div class="mobile-menu-item">
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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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<div class="mobile-submenu-wrapper">
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<a class="mobile-submenu-item" href="../../../index.html">
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Home page
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</a>
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<a class="mobile-submenu-item" href="../../../social.html">
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IOCCC social media
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</a>
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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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<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>index.html for 2020/endoh2</h2>
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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.up2index.html -->
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<div class="navbar">
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<a class="Left" href="../index.html">↑ jump to 2020/endoh2/index.html ↑</a>
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<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2020%2Fendoh2%2Fobfuscation%2Findex.html">✓</a>
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</div>
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<!-- END: this line ends content from: inc/navbar.up2index.html -->
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<!-- START: this line starts content from: inc/before-content.default.html -->
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<div class="content" id="content">
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<!-- END: this line ends content from: inc/before-content.default.html -->
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<!-- START: this line starts content for HTML phase 21 by: bin/pandoc-wrapper.sh via bin/md2html.sh -->
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<!-- BEFORE: 1st line of markdown file: 2020/endoh2/obfuscation/index.md -->
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<h1 id="opening-crawl-rot13-decoder">Opening crawl ROT13 decoder</h1>
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<p>The program contains dedicated font data for all uppercase alphabet letters.</p>
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<p>The source code of the font is <a href="glyphs.txt">glyphs.txt</a>, which is a sequence of
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chunks that is a ASCII code (65-90) followed by points data: <code>x,y,ctrl</code>.</p>
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<p>If <code>ctrl</code> is 1, the point is used as control point for quadratic <a href="https://en.wikipedia.org/wiki/Bézier_curve">bézier
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curve</a>.</p>
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<p><a href="https://github.com/ioccc-src/winner/blob/master/2020/endoh2/obfuscation/code.c">code.c</a> is the main logic for the program, which has some placeholders
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for font data and something else.</p>
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<p>It decompresses the font data and renders a given text by projection. It
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exploits <code>C99</code>’s <code>double complex</code> type to represent 2D points, but carefully
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coded so that it does not require any <code>math.h</code> functions; you don’t have to pass
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<code>-lm</code> to <code>cc</code>.</p>
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<p><a href="tmpl.txt">tmpl.txt</a> is a template for the program. <a href="https://github.com/ioccc-src/winner/blob/master/2020/endoh2/obfuscation/gen.rb">gen.rb</a> composes
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the all items and generates <a href="https://github.com/ioccc-src/winner/blob/master/2020/endoh2/prog.c">prog.c</a>.</p>
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<hr style="width:10%;text-align:left;margin-left:0">
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<p>Jump to: <a href="#">top</a></p>
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||
<!--
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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For more information, see:
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https://creativecommons.org/licenses/by-sa/4.0/
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-->
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<!--
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Copyright © 1984-2025 by Landon Curt Noll. All Rights Reserved.
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You are free to share and adapt this file under the terms of this license:
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Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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For more information, see:
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https://creativecommons.org/licenses/by-sa/4.0/
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<div id="copyright"><h3>Copyright © 1984-2025 by Landon Curt Noll:
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<a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean"
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target="_blank"
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rel="license noopener noreferrer">Some Rights Reserved</a></h3>
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<p>
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This work is <b>licensed by Landon Curt Noll</b> under
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<b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
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target="_blank"
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rel="license noopener noreferrer"
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style="display:inline-block;">CC BY-SA 4.0</a></b>.
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<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
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src="../../../png/cc.png"
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alt="cc inside circle symbol">
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<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
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src="../../../png/by.png"
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alt="person inside circle symbol">
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<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
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src="../../../png/sa.png"
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alt="arrow looping back on itself inside circle symbol"><br>
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You should <b>carefully review</b> the
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<b><a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en"
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target="_blank"
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rel="license noopener noreferrer">CC BY-SA 4.0 LEGAL CODE</a></b>
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before using the licensed material.<br>
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You may wish to review the
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<b><a href="../../../license.html"
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target="_blank"
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rel="license noopener noreferrer">highlights of some of the key features and terms</a></b>
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of <b>CC BY-SA 4.0</b>.<br>
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<div id="coda"><h3>Coda</h3>
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<p>
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<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fwww.ioccc.org%2F2020%2Fendoh2%2Fobfuscation%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
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