xv’s gists

xv / CycleEnum.cs

Last active October 28, 2025 03:32

Cycles through an enum upward or downward and clamps the index.

	private static T CycleEnum<T>(T type, int direction) where T : Enum
	{
	var values = (T[])Enum.GetValues(typeof(T));

	var index = Array.IndexOf(values, type);
	var newIndex = Math.Clamp(index + direction, 0, values.Length - 1);

	return values[newIndex];
	}

xv / CursorLoader.cs

Created October 27, 2025 03:52

	using System.ComponentModel;
	using System.Windows.Interop;
	using System.Windows.Input;
	using System.Runtime.InteropServices;
	using System.IO;

	using Windows.Win32.Foundation;
	using Windows.Win32.UI.WindowsAndMessaging;
	using Windows.Win32;

xv / min_max_macros.c

Created June 20, 2025 05:51

	#define MIN(A, B) ((A) < (B) ? (A) : (B))
	#define MAX(A, B) ((A) > (B) ? (A) : (B))
	#define CLAMP(N, LO, HI) (MIN(MAX((LO), (N)), (HI)))

xv / Win32Macros.cs

Last active January 7, 2024 01:23

Common Win32 API macros.

	public static byte LOBYTE(ushort a) =>
	(byte)(a & 0xFF);

	public static byte HIBYTE(ushort a) =>
	(byte)((a >> 8) & 0xFF);

	public static ushort HIWORD(uint a) =>
	(ushort)((a >> 16) & 0xFFFF);

	public static ushort LOWORD(uint a) =>

xv / calc_check_digit.py

Last active June 15, 2025 01:45

Python function to calculate the check digit of a UPC-12 barcode.

	def calc_check_digit(digits):
	digits = [int(i) for i in str(digits)][:-1]

	odd_pos_list = digits[0::2] # 1st, 3rd, 5th, etc
	even_pos_list = digits[1::2] # 2nd, 4th, 6th, etc

	n = (sum(odd_pos_list) * 3) + sum(even_pos_list)
	rmndr = n % 10
	return (10 - rmndr) if rmndr > 0 else 0

xv / clock.ps1

Last active June 15, 2022 19:57

PowerShell script utilizing .NET WinForms to create a GUI with a live clock label.

	Add-Type -AssemblyName System.Windows.Forms

	$Win32_ShowWindow = @'
	[DllImport("user32.dll")]
	public static extern bool ShowWindow(int handle, int nCmdShow);
	'@

	$User32 = Add-Type -MemberDefinition $Win32_ShowWindow `
	-Name 'User32' -Namespace 'Win32' -PassThru

xv / ShellFileIcon.cs

Created November 6, 2020 10:52

Simple method to retrieve the 16x16 shell file icon using SHFILEINFO structure.

	internal const uint FILE_ATTRIBUTE_NORMAL = 0x80;

	[Flags]
	internal enum SHGetFileInfoFlags
	{
	SHGFI_LARGEICON = 0x0,
	SHGFI_SMALLICON = 0x1,
	SHGFI_OPENICON = 0x2,
	SHGFI_SHELLICONSIZE = 0x4,
	SHGFI_PIDL = 0x8,

xv / UndocumentedAcrylic.cs

Created November 5, 2020 20:05

Undocumented API for Windows 10 Acrylic style.

	internal enum WindowCompositionAttribute
	{
	WCA_UNDEFINED = 0,
	WCA_NCRENDERING_ENABLED = 1,
	WCA_NCRENDERING_POLICY = 2,
	WCA_TRANSITIONS_FORCEDISABLED = 3,
	WCA_ALLOW_NCPAINT = 4,
	WCA_CAPTION_BUTTON_BOUNDS = 5,
	WCA_NONCLIENT_RTL_LAYOUT = 6,
	WCA_FORCE_ICONIC_REPRESENTATION = 7,

xv / toggle_disk_space_warning.bat

Last active October 17, 2020 11:56

Tiny script to enbale/disable the "Low Disk Space" warning.

	@echo off

	rem Run this script as administrator
	rem You may need to restart your computer to take effect

	set hKey=HKLM
	for /f "tokens=2 delims==." %%a in ('wmic os get version /value') do (
	if %%a neq 10 set hKey=HKCU
	)

xv / ColorFromHTML.cs

Created May 13, 2020 10:43

A much faster alternative to Microsoft's ColorTranslator.FromHtml() function.

	/// <summary>
	/// Translates an HTML-format color value to a GDI+
	/// <see cref="System.Drawing.Color"/> structure.
	/// </summary>
	///
	/// <param name="htmlVal">
	/// A 3 or 6 digit hexadecimal value to translate. Do not include the
	/// leading "#" sign.
	/// </param>
	///

Jad xv