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git clean -xfd
git submodule foreach --recursive git clean -xfd
git reset --hard
git submodule foreach --recursive git reset --hard
git submodule update --init --recursive

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Two Fast Methods of Generating True Random Numbers on the Arduino

Arduino true random number generator

B. Peng

December 2017

Abstract

The AVR series microcontrollers are a collection of cheap and versatile chips that are used in many applications ranging from hobbist projects to commercial infrastructure. One major problem for some hobbists is the lack of secure random number generation on the Arduino platform. The included pseudo-random number generator (PRNG) is very easy to defeat and is useless for any crypto-related uses. One recommendation from the Arduino Reference Manual is to use atmospheric noise from the chip's analog sensor pins as seed data^[6].
Unfortunately this method is extremely weak and should not be used to emulate a true random number generator (TRNG). Existing methods such as using the internal timer drift or using a dedicated generator are either too slow, requires extensive external hardware or modifications to the microcontroller's internal mech

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// =============================================================================
// XNU kperf/kpc demo
// Available for 64-bit Intel/Apple Silicon, macOS/iOS, with root privileges
//
//
// Demo 1 (profile a function in current thread):
// 1. Open directory '/usr/share/kpep/', find your CPU PMC database.
//    For M1 (Pro/Max), the database file is '/usr/share/kpep/a14.plist'.
// 2. Select a few events that you are interested in,
//    add their names to the `profile_events` array below.

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;

namespace Interpolation
{
    /// <summary>
    /// Spline interpolation class.

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// ==UserScript==
// @name         微信读书下载
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  下载微信读书的书籍资源
// @author       You
// @match        https://weread.qq.com/web/reader/*
// @grant unsafeWindow
// @grant        GM_setValue
// @grant        GM_getValue

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import cStringIO
import sys

class IOCapture(object):
    def __init__(self, stdout = True, stderr = True):
        self.captured_stdout = None
        self.captured_stderr = None
        if stdout:
            self.captured_stdout = cStringIO.StringIO()
        if stderr:

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// The intent of this class is to display the layout of an object in 
// memory.
// Compile with:
// clang -cc1 -x c++ -v -fdump-record-layouts test.cc -emit-llvm -o /dev/null
//
//
//*** Dumping AST Record Layout
   //0 | struct Top
   //0 |   int a
     //| [sizeof=4, dsize=4, align=4

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# Requirements:
#   clang - The classes/structs you want to dump must be used in code at least once, not just defined.
#   MSVC  - The classes/structs you want to dump must have "MEOW" in the name for "reportSingleClass" to work.
# Usage:
#   $ make dump_vtables file=test.cpp
dump_vtables:
  clang -cc1 -fdump-record-layouts -emit-llvm  $(file) > clang-vtable-layout-$(file).txt
  clang -cc1 -fdump-vtable-layouts -emit-llvm  $(file) > clang-record-layout-$(file).txt
  g++ -fdump-lang-class=$(file).txt $(file)
  cl.exe $(file) /d1reportSingleClassLayoutMEOW > msvc-single-class-vtable-layout-$(file).txt

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REM AST generation from MSVC 
cl /analyze /d1Aprintast %1 > %1.ast

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<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:sys="clr-namespace:System;assembly=mscorlib" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

<Page.Resources>
    <Style x:Key="MyFocusVisual">
      <Setter Property="Control.Template">
        <Setter.Value>
          <ControlTemplate TargetType="{x:Type Control}">
              <Grid Margin="3 2">