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VMDK to VHDX

Follow [steps][1]:

Download: http://download.microsoft.com/download/9/1/E/91E9F42C-3F1F-4AD9-92B7-8DD65DA3B0C2/mvmc_setup.msi (thanks @xavery)
Open Powershell as administrator and run Import-Module 'C:\Program Files\Microsoft Virtual Machine Converter\MvmcCmdlet.psd1'
And after ConvertTo-MvmcVirtualHardDisk -SourceLiteralPath d:\scratch\vmx\VM-disk1.vmdk -VhdType DynamicHardDisk -VhdFormat vhdx -destination c:\vm-disk1

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

Docker Hub 镜像加速器

国内从 Docker Hub 拉取镜像有时会遇到困难，此时可以配置镜像加速器。

Dockerized 实践 https://github.com/y0ngb1n/dockerized

1️⃣ Docker daemon 配置代理（推荐）

参考 Docker daemon 配置代理

	#include <cstring>
	#include <fstream>

	using namespace std;

	/* vxor_streambuf class ****************************************/

	class vxor_streambuf: public streambuf
	{
	public:

	// c - __attribute__((constructor)) equivalent in VC? - Stack Overflow
	// http://stackoverflow.com/questions/1113409/attribute-constructor-equivalent-in-vc/2390626#2390626
	// Rev.5

	// Initializer/finalizer sample for MSVC and GCC/Clang.
	// 2010-2016 Joe Lowe. Released into the public domain.
	#include <stdio.h>
	#include <stdlib.h>

	#ifdef __cplusplus

	/** A fragment shader to convert NV12 to RGB.
	* Input textures Y - is a block of size w*h.
	* texture UV is of size w*h/2.
	* Remember, both U and V are individually of size w/2*h/2, but they are interleaved.
	* The layout looks like this :
	* ----------
	* \| \|
	* \| Y \| size = w*h
	* \| \|
	* \|________\|

	#!/bin/bash
	# script that creates clang/llvm cross toolchain for aarch64 android target
	# compile a hello world program that runs on AOSP Android:
	# test with: adb push hello /data/cache && adb shell /data/cache/hello
	# GCC:
	# C: aarch64-linux-android-gcc hello.c -o hello -pie
	# C++: aarch64-linux-android-g++ hello.cc -o hello -pie -fPIC -static-libgcc \
	# -nostdlib -L/usr/local/aarch64-linux-android/lib -lc++ -lc -nostdinc++ \
	# -I/usr/local/aarch64-linux-android/include/c++/v1 -std=c++11
	# Clang/LLVM:

	#!/bin/sh

	ENABLED=yes
	PROCS=v2ray
	ARGS="-config /opt/etc/v2ray/config.pb -format=pb"
	PREARGS=""
	DESC=$PROCS
	PATH=/opt/sbin:/opt/bin:/opt/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

	SRC_BYPASS_IP_FILE=/opt/etc/v2ray/src_bypass_ip.txt

	#version 330 core
	out vec4 FragColor;
	in vec2 texCoord;
	uniform sampler2D textureY;
	uniform sampler2D textureVU;
	void main()
	{
	vec3 yuv, rgb;
	vec3 yuv2r = vec3(1.164, 0.0, 1.596);
	vec3 yuv2g = vec3(1.164, -0.391, -0.813);