sailfish009

sailfish009 / binary_gcd.cpp

Created April 21, 2019 05:44 — forked from cslarsen/binary_gcd.cpp

Binary gcd algorithm in C++ using iteration and bit shifts

	/*
	* The binary gcd algorithm using iteration.
	* Should be fairly fast.
	*
	* Put in the public domain by the author:
	*
	* Christian Stigen Larsen
	* http://csl.sublevel3.org
	*/
	int binary_gcd(int u, int v)

sailfish009 / ctz_clz.cpp

Created April 20, 2019 08:22 — forked from pps83/ctz_clz.cpp

__builtin_ctz (ctzl, ctzll) and __builtin_clz (clzl, clzll) for Visual Studio

	#ifdef _MSC_VER
	#include <intrin.h>

	static inline int __builtin_ctz(uint32_t x) {
	unsigned long ret;
	_BitScanForward(&ret, x);
	return (int)ret;
	}

	static inline int __builtin_ctzll(unsigned long long x) {

sailfish009 / GCD.txt

Created April 17, 2019 02:03

	// https://stackoverflow.com/questions/10956543/gcd-function-in-c-sans-cmath-library
	template <typename Number>
	Number GCD(Number u, Number v)
	{
	while (v != 0)
	{
	Number r = u % v;
	u = v;
	v = r;
	}

sailfish009 / currentTimeMillis.txt

Created April 16, 2019 01:25

	https://stackoverflow.com/questions/290227/java-system-currenttimemillis-equivalent-in-c-sharp

	private static readonly DateTime Jan1st1970 =
	new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);

	public static long currentTimeMillis()
	{
	return (long)(DateTime.UtcNow - Jan1st1970).TotalMilliseconds;
	}

sailfish009 / opencv.txt

Last active April 14, 2019 02:40

	findContours:

	https://docs.opencv.org/2.4.13.4/doc/tutorials/imgproc/shapedescriptors/find_contours/find_contours.html

	approxPolyDP:

	http://answers.opencv.org/question/71309/how-to-get-the-corners-of-rectangle-shapes/

	#include <opencv2/opencv.hpp>
	#include "opencv2/core/core.hpp"

sailfish009 / cvShowImageHWND.txt

Created April 2, 2019 08:46

	https://gudanrkim.blogspot.com/2014/11/how-to-display-opencv-cvmat-to-mfc.html?_escaped_fragment_

	void cvShowImageHWND(HWND hwnd, const CvArr* arr)

	{

	SIZE size = { 0, 0 };

	int channels = 0;

sailfish009 / c#_dll_expose_to_COM_interface.txt

Last active March 22, 2019 07:34

	// COM Data Types:
	// https://docs.microsoft.com/en-us/previous-versions/visualstudio/visual-studio-2008/sak564ww(v=vs.90)

	using System.Runtime.InteropServices;

	namespace COMDLL
	{
	[Guid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]
	[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	public interface IMyclass

sailfish009 / c2nasm.bash

Created March 21, 2019 05:47 — forked from abcdabcd987/c2nasm.bash

C to NASM Assembly

	#!/bin/bash
	# thanks to http://stackoverflow.com/a/20743090
	# thanks to https://github.com/diogovk/c2nasm
	# install objconv: https://github.com/vertis/objconv
	#
	# $1: source code

	set -e
	C_FILE="$1"
	BASE_NAME="${C_FILE%.*}"

sailfish009 / x86-64_calling_convention.txt

Last active March 21, 2019 03:59

https://aaronbloomfield.github.io/pdr/book/x86-64bit-ccc-chapter.pdf

sailfish009 / string_view.txt

Created March 20, 2019 05:00

http://www.modernescpp.com/index.php/c-17-avoid-copying-with-std-string-view