ynkdir

import ctypes


def __getattr__(key):
    if key not in apiset:
        raise AttributeError(f"cannot find {key}")
    dllname = apiset[key]
    if dllname not in dlls:
        dlls[dllname] = ctypes.CDLL(dllname)
    return dlls[dllname][key]

ynkdir

# ZoneInfo implementation using icu.
#
# NOTE: The built-in ICU version on Windows 11 25H2 is 72.1.0.4 and the bundled tzdata version is 2022g.
#
# https://github.com/microsoft/icu
#
# Windows has shipped icu.dll since Windows10.
# https://learn.microsoft.com/en-us/windows/win32/intl/international-components-for-unicode--icu-
#
# time zone data

ynkdir

// Test SystemTimeToTzSpecificLocalTime() behavior.
// Does SystemTimeToTzSpecificLocalTime() calculate Daylight Saving Time (DST) with dynamic time zone information?
//
// Test with "Eastern Standard Time"
// 2006: DST start at first Sunday in April
// 2007: DST start at second Sunday in March
//
// tzutil.exe /s "Eastern Standard Time"
// .\a.exe
//

ynkdir

# Cancel input() with CancelIoEx().
#
# There is known problem: https://github.com/microsoft/terminal/issues/12143

import msvcrt
import sys
import threading

from win32more import UInt32
from win32more.Windows.Win32.Foundation import TRUE

ynkdir

import sys
from ctypes import sizeof

from win32more import WinError
from win32more.Windows.Win32.Foundation import CloseHandle
from win32more.Windows.Win32.System.Threading import INFINITE, WaitForSingleObject
from win32more.Windows.Win32.UI.Shell import (
    SEE_MASK_NOCLOSEPROCESS,
    SHELLEXECUTEINFOW,
    ShellExecuteExW,

ynkdir

# /// script
# dependencies = ["win32more"]
# ///

import sys
from ctypes import Structure, cast, memoryview_at, pointer, wstring_at

from win32more import WINFUNCTYPE, Char, IntPtr, UInt16, WinError
from win32more.Windows.Win32.Foundation import (
    BOOL,

ynkdir

# /// script
# dependencies = ["win32more"]
# ///
from ctypes import POINTER

from win32more import FAILED, Byte, List, UInt32, WinError
from win32more.Microsoft.UI.Xaml.Media.Imaging import WriteableBitmap
from win32more.Microsoft.Windows.Storage.Pickers import FileOpenPicker
from win32more.Windows.Win32.Graphics.Imaging import (
    CLSID_WICImagingFactory,

ynkdir

# /// script
# dependencies = ["win32more"]
# ///
#
# Ntfs preserves file names as is.
# Windows API compares them using NFC normalization and case-insensitive matching.
#
# Directory has case sensitive flag.
# With the flag enabled, the directory can contain file names that differ only by case.
# fsutil.exe file setCaseSensitiveInfo <dir>

ynkdir

# calculate dst offset with icu api
#
# /// script
# dependencies = ["win32more"]
# ///

from win32more import String
from win32more.Windows.Win32.Globalization import (
    UCAL_DEFAULT,
    UCAL_DST_OFFSET,

ynkdir

Windows Time Zone API / Data Specification

Specification of the Win32 time zone APIs and their registry data. Based on writing wintz.py / wintz.c (reimplementations of SystemTimeToTzSpecificLocalTimeEx / TzSpecificLocalTimeToSystemTimeEx) and brute-force comparing them against the real API output.

Figures are measured on this machine (Windows 11, 141 zones / 714 rule entries).