ttaubert

#include <stdint.h>

// 0xff if MSB(x) = 1 else 0x00
uint8_t msb(uint8_t x) {
  return 0 - (x >> (8 * sizeof(x) - 1));
}

// 0xff if a >= b else 0x00
uint8_t nz(uint8_t x) {
  return ~msb(~x & (x - 1));

ttaubert

#include <stdint.h>

uint8_t add(uint8_t a, uint8_t b) {
  uint8_t sum = a + b;
  return sum < a ? UINT8_MAX : sum;
}

ttaubert

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

/*
 * thirty-two
 * https://github.com/chrisumbel/thirty-two
 *

ttaubert

function*r(k){t=x=>(y=x%n)in s?s[y]:y;w=_=>t((s[i%n]=t(j+=f=t(i++)))+(s[j%n]=f));for(n=256,s=[i=j=0];i<n;)w(j+=k[i%k.length]);for(j=0,i=1;;)yield w()}

// A raw RC4 stream.
// Works in Firefox only (needs lots of ES6).
// 150 chars

// Usage:
for (var b of r([65,65,65])) {
  console.log(b);
}

ttaubert

Keybase proof

I hereby claim:

• I am ttaubert on github.
• I am ttaubert (https://keybase.io/ttaubert) on keybase.
• I have a public key whose fingerprint is B1CB F850 F25E 7B7B 8C91 9AA6 4DD9 6198 4B92 E4F2

To claim this, I am signing this object: