Dmitry Loginov qrealka

Effective Modern CMake

Getting Started

For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.

After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft

What is the Strict Aliasing Rule and Why do we care?

(OR Type Punning, Undefined Behavior and Alignment, Oh My!)

What is strict aliasing? First we will describe what is aliasing and then we can learn what being strict about it means.

In C and C++ aliasing has to do with what expression types we are allowed to access stored values through. In both C and C++ the standard specifies which expression types are allowed to alias which types. The compiler and optimizer are allowed to assume we follow the aliasing rules strictly, hence the term strict aliasing rule. If we attempt to access a value using a type not allowed it is classified as undefined behavior(UB). Once we have undefined behavior all bets are off, the results of our program are no longer reliable.

Unfortunately with strict aliasing violations, we will often obtain the results we expect, leaving the possibility the a future version of a compiler with a new optimization will break code we th

Error and Exception Handling Techniques

http://lambda-the-ultimate.org/node/3896#comment-58374

Reposting here for safe keeping.

Error Codes

One of the return values is the error. Use when the goal is to cover-your-ass by ensuring that error handling is possible, even though you know any error handling or recovery would clutter the happy-path and thus ensure programmers are reluctant to admit to their existence at all.

C++ source code snippets

Represent one byte

using Byte = std::uint8_t;

Represent a dynamic number of bytes

#include <vector>

	#include "gtest/gtest.h"

	using namespace testing;

	class ConfigurableEventListener : public TestEventListener
	{

	protected:
	TestEventListener* eventListener;

	//
	// Ref = src
	// https://www.blackhat.com/docs/eu-17/materials/eu-17-Liberman-Lost-In-Transaction-Process-Doppelganging.pdf
	//
	// Credits:
	// Vyacheslav Rusakov @swwwolf
	// Tom Bonner @thomas_bonner
	//

	#include <Windows.h>

	//
	// Copyright (c) 2018 Kris Jusiak (kris at jusiak dot net)
	//
	// Distributed under the Boost Software License, Version 1.0.
	// (See accompanying file LICENSE_1_0.txt or copy at
	// http://www.boost.org/LICENSE_1_0.txt)
	//
	#pragma once
	#if not defined(__cpp_variadic_templates) or \
	not defined(__cpp_rvalue_references) or not defined(__cpp_decltype) or \

	/*
	* Random-Number Utilities (randutil)
	* Addresses common issues with C++11 random number generation.
	* Makes good seeding easier, and makes using RNGs easy while retaining
	* all the power.
	*
	* The MIT License (MIT)
	*
	* Copyright (c) 2015 Melissa E. O'Neill
	*

	#include <windows.h>
	#include <winternl.h>
	#include <stdio.h>

	#pragma comment(lib, "user32")
	#pragma comment(lib, "gdi32")

	typedef struct _LARGE_STRING {
	ULONG Length;
	ULONG MaximumLength:31;

	/* SMBLoris attack proof-of-concept
	*
	* Copyright 2017 Hector Martin "marcan" <[email protected]>
	*
	* Licensed under the terms of the 2-clause BSD license.
	*
	* This is a proof of concept of a publicly disclosed vulnerability.
	* Please do not go around randomly DoSing people with it.
	*
	* Tips: do not use your local IP as source, or if you do, use iptables to block