float Q_rsqrt( float number ) { long i; float x2, y; const float threehalfs = 1.5F; x2 = number * 0.5F; y = number; i = * ( long * ) &y; // evil floating point bit level hacking i = 0x5f3759df - ( i >> 1 ); // what the fuck?| y = * ( float * ) &i; y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration // y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed return y; }

Links

GitHub Twitter Last.fm Reddit

Git Repository
Shitty File Host

Library

Shhhh!

The Aggregate Magic Algorithms - Dr. Hank G. Dietz, c. 2015 The Bastard Operator From Hell (Complete) - Simon Travaglia, 1995-2005. Beej's Guide to Network Programming - Brian "Beej" Hall. Filesystem deduplication is a sidechannel - Matthew Garrett, 2020. Functional Programming in C++ - John Carmack, 2012. Hacking Passion - Katrina Owen via the Internet Archive, 2013 archived 2016.
How is GNU `yes` so fast? - Me! 2017. How you average numbers matters - A. Sinan Unur, 2015. Infinite versions of minesweeper are Turing complete - Richard Kaye, 2000, revised 2007. Judging Books by Their Covers via the Internet Archive - Richard Feynman, 1985, extended 1999, archived 2018. No Deadlines For You! Software Dev Without Estimates, Specs, or Other Lies - Dan Milstein, 2013. Making Crash Bandicoot - Andy Gavin, 2011. Steal Everything, Kill Everyone, Cause Total Financial Ruin! [video] - Jayson E. Street at DEFCON 19, 2011. Time on Unix - Patrick Louis, 2020. Using Make - writing less Makefile - june@casual.agency, 2018. Van Eck phreaking on Wikipedia The Website is Down [videos] - Josh Weinberg, 2008-?. x86 assembly doesn't have to be scary - Ben Cox, 2018.

Networking

There's no place like 127.0.0.0/8!

JMAP - 2019-current. MX Toolbox, Inc. - 2004-current. Netgate - Rubicon Communications, LLC. OPNsense - 2015-current. pfSense - c. 2006-current. Weaponizing Middleboxes for TCP Reflected Amplification - August 2021. YouGetSignal.com - Kirk Ouimet, 2009-current.

Programming Projects

printf("Hello, world!\n");

CNCF Cloud Native Interactive Landscape - The Cloud Native Computing Foundation (Linux Foundation) - 2015-current. FreeIPA - Red Hat, Inc., 2007-current. HeavyThing - 2 Ton Digital, c. 2017. lol-qwop - various contributors, 2016-2020. Mimikatz - Benjamin Delpy, c. 2014-current. neo8ball - Anthony DeDominic, c. 2016-current ONLYOFFICE - Ascensio System SIA, c. 2012-current OpenMW - The OpenMW Project, 2008-current. Perl::Critic sandsifter - domas, 2017. SerenityOS - Andreas King et al., 2018-current. Sortix - Jonas 'Sortie' Termansen et al., 2011-current.

Telecommunications

You get signal!

Asterisk PBX - Sangoma Technologies Corporation (formerly Digium, Inc.) FiberNinja on YouTube, 2012-2019 Sandman.com Sangoma Technologies Corporation (formerly Digium, Inc.)

Miscellania

Et cetera!

ControlByWeb - Xytronix Research & Design, Inc. Diversatech Incorporated Let's Encrypt - The Electronic Frontier Foundation. OnLogic, Inc. (formerly LogicSupply) PC Engines GmbH. pgrmr.com, Inc. - Alan Post et al, 2005-current Rossmann Repair Group World Intellectual Property Organization