GetDateFormatEx

// KERNEL32.dll
#include <windows.h>

INT GetDateFormatEx(
    LPCWSTR lpLocaleName,   // optional
    ENUM_DATE_FORMATS_FLAGS dwFlags,
    const SYSTEMTIME* lpDate,   // optional
    LPCWSTR lpFormat,   // optional
    LPWSTR lpDateStr,   // optional
    INT cchDate,
    LPCWSTR lpCalendar   // optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetDateFormatEx(
    <MarshalAs(UnmanagedType.LPWStr)> lpLocaleName As String,   ' LPCWSTR optional
    dwFlags As UInteger,   ' ENUM_DATE_FORMATS_FLAGS
    lpDate As IntPtr,   ' SYSTEMTIME* optional
    <MarshalAs(UnmanagedType.LPWStr)> lpFormat As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpDateStr As System.Text.StringBuilder,   ' LPWSTR optional, out
    cchDate As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPWStr)> lpCalendar As String   ' LPCWSTR optional
) As Integer
End Function

' lpLocaleName : LPCWSTR optional
' dwFlags : ENUM_DATE_FORMATS_FLAGS
' lpDate : SYSTEMTIME* optional
' lpFormat : LPCWSTR optional
' lpDateStr : LPWSTR optional, out
' cchDate : INT
' lpCalendar : LPCWSTR optional
Declare PtrSafe Function GetDateFormatEx Lib "kernel32" ( _
    ByVal lpLocaleName As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal lpDate As LongPtr, _
    ByVal lpFormat As LongPtr, _
    ByVal lpDateStr As LongPtr, _
    ByVal cchDate As Long, _
    ByVal lpCalendar As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetDateFormatEx = ctypes.windll.kernel32.GetDateFormatEx
GetDateFormatEx.restype = ctypes.c_int
GetDateFormatEx.argtypes = [
    wintypes.LPCWSTR,  # lpLocaleName : LPCWSTR optional
    wintypes.DWORD,  # dwFlags : ENUM_DATE_FORMATS_FLAGS
    ctypes.c_void_p,  # lpDate : SYSTEMTIME* optional
    wintypes.LPCWSTR,  # lpFormat : LPCWSTR optional
    wintypes.LPWSTR,  # lpDateStr : LPWSTR optional, out
    ctypes.c_int,  # cchDate : INT
    wintypes.LPCWSTR,  # lpCalendar : LPCWSTR optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetDateFormatEx = Fiddle::Function.new(
  lib['GetDateFormatEx'],
  [
    Fiddle::TYPE_VOIDP,  # lpLocaleName : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwFlags : ENUM_DATE_FORMATS_FLAGS
    Fiddle::TYPE_VOIDP,  # lpDate : SYSTEMTIME* optional
    Fiddle::TYPE_VOIDP,  # lpFormat : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpDateStr : LPWSTR optional, out
    Fiddle::TYPE_INT,  # cchDate : INT
    Fiddle::TYPE_VOIDP,  # lpCalendar : LPCWSTR optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetDateFormatEx(
        lpLocaleName: *const u16,  // LPCWSTR optional
        dwFlags: u32,  // ENUM_DATE_FORMATS_FLAGS
        lpDate: *const SYSTEMTIME,  // SYSTEMTIME* optional
        lpFormat: *const u16,  // LPCWSTR optional
        lpDateStr: *mut u16,  // LPWSTR optional, out
        cchDate: i32,  // INT
        lpCalendar: *const u16  // LPCWSTR optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern int GetDateFormatEx([MarshalAs(UnmanagedType.LPWStr)] string lpLocaleName, uint dwFlags, IntPtr lpDate, [MarshalAs(UnmanagedType.LPWStr)] string lpFormat, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpDateStr, int cchDate, [MarshalAs(UnmanagedType.LPWStr)] string lpCalendar);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetDateFormatEx' -Namespace Win32 -PassThru
# $api::GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)

#uselib "KERNEL32.dll"
#func global GetDateFormatEx "GetDateFormatEx" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; GetDateFormatEx lpLocaleName, dwFlags, varptr(lpDate), lpFormat, varptr(lpDateStr), cchDate, lpCalendar   ; 戻り値は stat
; lpLocaleName : LPCWSTR optional -> "sptr"
; dwFlags : ENUM_DATE_FORMATS_FLAGS -> "sptr"
; lpDate : SYSTEMTIME* optional -> "sptr"
; lpFormat : LPCWSTR optional -> "sptr"
; lpDateStr : LPWSTR optional, out -> "sptr"
; cchDate : INT -> "sptr"
; lpCalendar : LPCWSTR optional -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetDateFormatEx = kernel32.NewProc("GetDateFormatEx")
)

// lpLocaleName (LPCWSTR optional), dwFlags (ENUM_DATE_FORMATS_FLAGS), lpDate (SYSTEMTIME* optional), lpFormat (LPCWSTR optional), lpDateStr (LPWSTR optional, out), cchDate (INT), lpCalendar (LPCWSTR optional)
r1, _, err := procGetDateFormatEx.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpLocaleName))),
	uintptr(dwFlags),
	uintptr(lpDate),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFormat))),
	uintptr(lpDateStr),
	uintptr(cchDate),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpCalendar))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetDateFormatEx(
  lpLocaleName: PWideChar;   // LPCWSTR optional
  dwFlags: DWORD;   // ENUM_DATE_FORMATS_FLAGS
  lpDate: Pointer;   // SYSTEMTIME* optional
  lpFormat: PWideChar;   // LPCWSTR optional
  lpDateStr: PWideChar;   // LPWSTR optional, out
  cchDate: Integer;   // INT
  lpCalendar: PWideChar   // LPCWSTR optional
): Integer; stdcall;
  external 'KERNEL32.dll' name 'GetDateFormatEx';

result := DllCall("KERNEL32\GetDateFormatEx"
    , "WStr", lpLocaleName   ; LPCWSTR optional
    , "UInt", dwFlags   ; ENUM_DATE_FORMATS_FLAGS
    , "Ptr", lpDate   ; SYSTEMTIME* optional
    , "WStr", lpFormat   ; LPCWSTR optional
    , "Ptr", lpDateStr   ; LPWSTR optional, out
    , "Int", cchDate   ; INT
    , "WStr", lpCalendar   ; LPCWSTR optional
    , "Int")   ; return: INT

●GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar) = DLL("KERNEL32.dll", "int GetDateFormatEx(char*, dword, void*, char*, char*, int, char*)")
# 呼び出し: GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
# lpLocaleName : LPCWSTR optional -> "char*"
# dwFlags : ENUM_DATE_FORMATS_FLAGS -> "dword"
# lpDate : SYSTEMTIME* optional -> "void*"
# lpFormat : LPCWSTR optional -> "char*"
# lpDateStr : LPWSTR optional, out -> "char*"
# cchDate : INT -> "int"
# lpCalendar : LPCWSTR optional -> "char*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。

const std = @import("std");

extern "kernel32" fn GetDateFormatEx(
    lpLocaleName: [*c]const u16, // LPCWSTR optional
    dwFlags: u32, // ENUM_DATE_FORMATS_FLAGS
    lpDate: [*c]SYSTEMTIME, // SYSTEMTIME* optional
    lpFormat: [*c]const u16, // LPCWSTR optional
    lpDateStr: [*c]u16, // LPWSTR optional, out
    cchDate: i32, // INT
    lpCalendar: [*c]const u16 // LPCWSTR optional
) callconv(std.os.windows.WINAPI) i32;

proc GetDateFormatEx(
    lpLocaleName: WideCString,  # LPCWSTR optional
    dwFlags: uint32,  # ENUM_DATE_FORMATS_FLAGS
    lpDate: ptr SYSTEMTIME,  # SYSTEMTIME* optional
    lpFormat: WideCString,  # LPCWSTR optional
    lpDateStr: ptr uint16,  # LPWSTR optional, out
    cchDate: int32,  # INT
    lpCalendar: WideCString  # LPCWSTR optional
): int32 {.importc: "GetDateFormatEx", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int GetDateFormatEx(
    const(wchar)* lpLocaleName,   // LPCWSTR optional
    uint dwFlags,   // ENUM_DATE_FORMATS_FLAGS
    SYSTEMTIME* lpDate,   // SYSTEMTIME* optional
    const(wchar)* lpFormat,   // LPCWSTR optional
    wchar* lpDateStr,   // LPWSTR optional, out
    int cchDate,   // INT
    const(wchar)* lpCalendar   // LPCWSTR optional
);

ccall((:GetDateFormatEx, "KERNEL32.dll"), stdcall, Int32,
      (Cwstring, UInt32, Ptr{SYSTEMTIME}, Cwstring, Ptr{UInt16}, Int32, Cwstring),
      lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
# lpLocaleName : LPCWSTR optional -> Cwstring
# dwFlags : ENUM_DATE_FORMATS_FLAGS -> UInt32
# lpDate : SYSTEMTIME* optional -> Ptr{SYSTEMTIME}
# lpFormat : LPCWSTR optional -> Cwstring
# lpDateStr : LPWSTR optional, out -> Ptr{UInt16}
# cchDate : INT -> Int32
# lpCalendar : LPCWSTR optional -> Cwstring
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GetDateFormatEx(
    const uint16_t* lpLocaleName,
    uint32_t dwFlags,
    void* lpDate,
    const uint16_t* lpFormat,
    uint16_t* lpDateStr,
    int32_t cchDate,
    const uint16_t* lpCalendar);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
-- lpLocaleName : LPCWSTR optional
-- dwFlags : ENUM_DATE_FORMATS_FLAGS
-- lpDate : SYSTEMTIME* optional
-- lpFormat : LPCWSTR optional
-- lpDateStr : LPWSTR optional, out
-- cchDate : INT
-- lpCalendar : LPCWSTR optional
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('KERNEL32.dll');
const GetDateFormatEx = lib.func('__stdcall', 'GetDateFormatEx', 'int32_t', ['str16', 'uint32_t', 'void *', 'str16', 'uint16_t *', 'int32_t', 'str16']);
// GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
// lpLocaleName : LPCWSTR optional -> 'str16'
// dwFlags : ENUM_DATE_FORMATS_FLAGS -> 'uint32_t'
// lpDate : SYSTEMTIME* optional -> 'void *'
// lpFormat : LPCWSTR optional -> 'str16'
// lpDateStr : LPWSTR optional, out -> 'uint16_t *'
// cchDate : INT -> 'int32_t'
// lpCalendar : LPCWSTR optional -> 'str16'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("KERNEL32.dll", {
  GetDateFormatEx: { parameters: ["buffer", "u32", "pointer", "buffer", "buffer", "i32", "buffer"], result: "i32" },
});
// lib.symbols.GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
// lpLocaleName : LPCWSTR optional -> "buffer"
// dwFlags : ENUM_DATE_FORMATS_FLAGS -> "u32"
// lpDate : SYSTEMTIME* optional -> "pointer"
// lpFormat : LPCWSTR optional -> "buffer"
// lpDateStr : LPWSTR optional, out -> "buffer"
// cchDate : INT -> "i32"
// lpCalendar : LPCWSTR optional -> "buffer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t GetDateFormatEx(
    const uint16_t* lpLocaleName,
    uint32_t dwFlags,
    void* lpDate,
    const uint16_t* lpFormat,
    uint16_t* lpDateStr,
    int32_t cchDate,
    const uint16_t* lpCalendar);
C, "KERNEL32.dll");
// $ffi->GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar);
// lpLocaleName : LPCWSTR optional
// dwFlags : ENUM_DATE_FORMATS_FLAGS
// lpDate : SYSTEMTIME* optional
// lpFormat : LPCWSTR optional
// lpDateStr : LPWSTR optional, out
// cchDate : INT
// lpCalendar : LPCWSTR optional
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    int GetDateFormatEx(
        WString lpLocaleName,   // LPCWSTR optional
        int dwFlags,   // ENUM_DATE_FORMATS_FLAGS
        Pointer lpDate,   // SYSTEMTIME* optional
        WString lpFormat,   // LPCWSTR optional
        char[] lpDateStr,   // LPWSTR optional, out
        int cchDate,   // INT
        WString lpCalendar   // LPCWSTR optional
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun GetDateFormatEx = GetDateFormatEx(
    lpLocaleName : UInt16*,   # LPCWSTR optional
    dwFlags : UInt32,   # ENUM_DATE_FORMATS_FLAGS
    lpDate : SYSTEMTIME*,   # SYSTEMTIME* optional
    lpFormat : UInt16*,   # LPCWSTR optional
    lpDateStr : UInt16*,   # LPWSTR optional, out
    cchDate : Int32,   # INT
    lpCalendar : UInt16*   # LPCWSTR optional
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef GetDateFormatExNative = Int32 Function(Pointer<Utf16>, Uint32, Pointer<Void>, Pointer<Utf16>, Pointer<Utf16>, Int32, Pointer<Utf16>);
typedef GetDateFormatExDart = int Function(Pointer<Utf16>, int, Pointer<Void>, Pointer<Utf16>, Pointer<Utf16>, int, Pointer<Utf16>);
final GetDateFormatEx = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<GetDateFormatExNative, GetDateFormatExDart>('GetDateFormatEx');
// lpLocaleName : LPCWSTR optional -> Pointer<Utf16>
// dwFlags : ENUM_DATE_FORMATS_FLAGS -> Uint32
// lpDate : SYSTEMTIME* optional -> Pointer<Void>
// lpFormat : LPCWSTR optional -> Pointer<Utf16>
// lpDateStr : LPWSTR optional, out -> Pointer<Utf16>
// cchDate : INT -> Int32
// lpCalendar : LPCWSTR optional -> Pointer<Utf16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetDateFormatEx(
  lpLocaleName: PWideChar;   // LPCWSTR optional
  dwFlags: DWORD;   // ENUM_DATE_FORMATS_FLAGS
  lpDate: Pointer;   // SYSTEMTIME* optional
  lpFormat: PWideChar;   // LPCWSTR optional
  lpDateStr: PWideChar;   // LPWSTR optional, out
  cchDate: Integer;   // INT
  lpCalendar: PWideChar   // LPCWSTR optional
): Integer; stdcall;
  external 'KERNEL32.dll' name 'GetDateFormatEx';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "GetDateFormatEx"
  c_GetDateFormatEx :: CWString -> Word32 -> Ptr () -> CWString -> CWString -> Int32 -> CWString -> IO Int32
-- lpLocaleName : LPCWSTR optional -> CWString
-- dwFlags : ENUM_DATE_FORMATS_FLAGS -> Word32
-- lpDate : SYSTEMTIME* optional -> Ptr ()
-- lpFormat : LPCWSTR optional -> CWString
-- lpDateStr : LPWSTR optional, out -> CWString
-- cchDate : INT -> Int32
-- lpCalendar : LPCWSTR optional -> CWString
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let getdateformatex =
  foreign "GetDateFormatEx"
    ((ptr uint16_t) @-> uint32_t @-> (ptr void) @-> (ptr uint16_t) @-> (ptr uint16_t) @-> int32_t @-> (ptr uint16_t) @-> returning int32_t)
(* lpLocaleName : LPCWSTR optional -> (ptr uint16_t) *)
(* dwFlags : ENUM_DATE_FORMATS_FLAGS -> uint32_t *)
(* lpDate : SYSTEMTIME* optional -> (ptr void) *)
(* lpFormat : LPCWSTR optional -> (ptr uint16_t) *)
(* lpDateStr : LPWSTR optional, out -> (ptr uint16_t) *)
(* cchDate : INT -> int32_t *)
(* lpCalendar : LPCWSTR optional -> (ptr uint16_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("GetDateFormatEx" get-date-format-ex :convention :stdcall) :int32
  (lp-locale-name (:string :encoding :utf-16le))   ; LPCWSTR optional
  (dw-flags :uint32)   ; ENUM_DATE_FORMATS_FLAGS
  (lp-date :pointer)   ; SYSTEMTIME* optional
  (lp-format (:string :encoding :utf-16le))   ; LPCWSTR optional
  (lp-date-str :pointer)   ; LPWSTR optional, out
  (cch-date :int32)   ; INT
  (lp-calendar (:string :encoding :utf-16le)))   ; LPCWSTR optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetDateFormatEx = Win32::API::More->new('KERNEL32',
    'int GetDateFormatEx(LPCWSTR lpLocaleName, DWORD dwFlags, LPVOID lpDate, LPCWSTR lpFormat, LPWSTR lpDateStr, int cchDate, LPCWSTR lpCalendar)');
# my $ret = $GetDateFormatEx->Call($lpLocaleName, $dwFlags, $lpDate, $lpFormat, $lpDateStr, $cchDate, $lpCalendar);
# lpLocaleName : LPCWSTR optional -> LPCWSTR
# dwFlags : ENUM_DATE_FORMATS_FLAGS -> DWORD
# lpDate : SYSTEMTIME* optional -> LPVOID
# lpFormat : LPCWSTR optional -> LPCWSTR
# lpDateStr : LPWSTR optional, out -> LPWSTR
# cchDate : INT -> int
# lpCalendar : LPCWSTR optional -> LPCWSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。