Hackers Delight

"This is the first book that promises to tell the deep, dark secrets of computer arithmetic, and it delivers in spades. It contains every trick I knew plus many, many more. A godsend for library developers, compiler writers, and lovers of elegant hacks, it deserves a spot on your shelf right next to Knuth." --Josh Bloch (Praise for the first edition) In Hacker’s Delight, Second Edition, Hank Warren once again compiles an irresistible collection of programming hacks: timesaving techniques, algorithms, and tricks that help programmers build more elegant and efficient software, while also gaining deeper insights into their craft. Warren’s hacks are eminently practical, but they’re also intrinsically interesting, and sometimes unexpected, much like the solution to a great puzzle. They are, in a word, a delight to any programmer who is excited by the opportunity to improve. Extensive additions in this edition include A new chapter on cyclic redundancy checking (CRC), including routines for the commonly used CRC-32 code A new chapter on error correcting codes (ECC), including routines for the Hamming code More coverage of integer division by constants, including methods using only shifts and adds Computing remainders without computing a quotient More coverage of population count and counting leading zeros Array population count New algorithms for compress and expand An LRU algorithm Floating-point to/from integer conversions Approximate floating-point reciprocal square root routine A gallery of graphs of discrete functions Now with exercises and answers

A primer on the underlying technologies that allow computer programs to work. Covers topics like computer hardware, combinatorial logic, sequential logic, computer architecture, computer anatomy, and Input/Output. Many coders are unfamiliar with the underlying technologies that make their programs run. But why should you care when your code appears to work? Because you want it to run well and not be riddled with hard-to-find bugs. You don't want to be in the news because your code had a security problem. Lots of technical detail is available online but it's not organized or collected into a convenient place. In The Secret Life of Programs, veteran engineer Jonathan E. Steinhart explores--in depth--the foundational concepts that underlie the machine. Subjects like computer hardware, how software behaves on hardware, as well as how people have solved problems using technology over time. You'll learn: How the real world is converted into a form that computers understand, like bits, logic, numbers, text, and colors The fundamental building blocks that make up a computer including logic gates, adders, decoders, registers, and memory Why designing programs to match computer hardware, especially memory, improves performance How programs are converted into machine language that computers understand How software building blocks are combined to create programs like web browsers Clever tricks for making programs more efficient, like loop invariance, strength reduction, and recursive subdivision The fundamentals of computer security and machine intelligence Project design, documentation, scheduling, portability, maintenance, and other practical programming realities. Learn what really happens when your code runs on the machine and you'll learn to craft better, more efficient code.

Who are computer hackers? What is free software? And what does the emergence of a community dedicated to the production of free and open source software--and to hacking as a technical, aesthetic, and moral project--reveal about the values of contemporary liberalism? Exploring the rise and political significance of the free and open source software (F/OSS) movement in the United States and Europe, Coding Freedom details the ethics behind hackers' devotion to F/OSS, the social codes that guide its production, and the political struggles through which hackers question the scope and direction of copyright and patent law. In telling the story of the F/OSS movement, the book unfolds a broader narrative involving computing, the politics of access, and intellectual property. E. Gabriella Coleman tracks the ways in which hackers collaborate and examines passionate manifestos, hacker humor, free software project governance, and festive hacker conferences. Looking at the ways that hackers sustain their productive freedom, Coleman shows that these activists, driven by a commitment to their work, reformulate key ideals including free speech, transparency, and meritocracy, and refuse restrictive intellectual protections. Coleman demonstrates how hacking, so often marginalized or misunderstood, sheds light on the continuing relevance of liberalism in online collaboration.

Describes how computer viruses are created and spred, and discusses computer harassment, online con artists, protection data with encryption, and general computer security issues.

The ultimate book on the worldwide movement of hackers, pranksters, and activists collectively known as Anonymous—by the writer the Huffington Post says “knows all of Anonymous’ deepest, darkest secrets” “A work of anthropology that sometimes echoes a John le Carré novel.” —Wired Half a dozen years ago, anthropologist Gabriella Coleman set out to study the rise of this global phenomenon just as some of its members were turning to political protest and dangerous disruption (before Anonymous shot to fame as a key player in the battles over WikiLeaks, the Arab Spring, and Occupy Wall Street). She ended up becoming so closely connected to Anonymous that the tricky story of her inside–outside status as Anon confidante, interpreter, and erstwhile mouthpiece forms one of the themes of this witty and entirely engrossing book. The narrative brims with details unearthed from within a notoriously mysterious subculture, whose semi-legendary tricksters—such as Topiary, tflow, Anachaos, and Sabu—emerge as complex, diverse, politically and culturally sophisticated people. Propelled by years of chats and encounters with a multitude of hackers, including imprisoned activist Jeremy Hammond and the double agent who helped put him away, Hector Monsegur, Hacker, Hoaxer, Whistleblower, Spy is filled with insights into the meaning of digital activism and little understood facets of culture in the Internet age, including the history of “trolling,” the ethics and metaphysics of hacking, and the origins and manifold meanings of “the lulz.”

Using the exploits of three international hackers, Cyberpunk explores the world of high-tech computer rebels and the subculture they've created. In a book as exciting as any Ludlum novel, the authors show how these young outlaws have learned to penetrate the most sensitive computer networks and how difficult it is to stop them.

“You’re going to want to share copies of this book with your overbooked friends and colleagues, but before you do, take some time to read it yourself. Funt’s wisdom around making space is priceless.” —Seth Godin, author of The Practice Do you wish you could stop the mayhem of work and life and just take a minute? Do you sense you could contribute more if there were a little more room in the day? Does busyness deprive you and your burnt-out team of the oxygen your talents need to catch fire? Many have felt that way, yet taking a pause has seemed impossible—until now. In A Minute to Think, Juliet Funt, a globally recognized warrior in the battle against busyness, provides a powerful guide that will give you the permission, framework, and specific direction you need to do the following: Regain control of your overloaded, caffeinated, inbox-worshiping workday Liberate yourself and your teams from burnout and busywork Reclaim creativity and focus despite the chaos around you Bring thoughtfulness into designing your next work norms Tame the beast of email and escape the mire of meetings Find your precious minute to think You’re not alone in your yearning for freedom from constant reactivity. The global workforce today is so fried that it belongs in the food court of a county fair. We’re relentlessly behind the curve, dousing fires everywhere, and our 3 a.m. insomnia provides the only unscheduled thinking time of the day. What we need reinserted in our lives is the missing element of white space—short periods of open, unscheduled time that, when recaptured, change the very nature of work. White space is the stepping back, the strategic pause, the oxygen that allows the sparks of our efforts to catch fire. White space has the power to radically—and simply—reinvent the way we approach work in this maxed-out, post-COVID 21st-century world. With Juliet’s memorable stories, easy-to-use tools, and razor-sharp instruction, she carves for us an escape route from the overwhelming amount of low-value tasks and the daily avalanche of e-mails, meetings, decks, and reports. Using research, client stories, and a relatable voice, Juliet shows all of us how to reclaim time for thinking and make room for what truly matters. Whether you are an individual trying to build a more sane and humane flow of daily work, a team that wants new levels of efficiency and effectiveness, or an entire organization changing your culture toward thoughtfulness, this book will lead you there.

; 0x40 assembly riddles "xchg rax, rax" is a collection of assembly gems and riddles I found over many years of reversing and writing assembly code. The book contains 0x40 short assembly snippets, each built to teach you one concept about assembly, math or life in general. Be warned - This book is not for beginners. It doesn't contain anything besides assembly code, and therefore some x86_64 assembly knowledge is required. How to use this book? Get an assembler (Yasm or Nasm is recommended), and obtain the x86_64 instruction set. Then for every snippet, try to understand what it does. Try to run it with different inputs if you don't understand it in the beginning. Look up for instructions you don't fully know in the Instruction sets PDF. Start from the beginning. The order has meaning. As a final note, the full contents of the book could be viewed for free on my website (Just google "xchg rax, rax").