SetPrivateObjectSecurityEx

// ADVAPI32.dll
#include <windows.h>

BOOL SetPrivateObjectSecurityEx(
    OBJECT_SECURITY_INFORMATION SecurityInformation,
    PSECURITY_DESCRIPTOR ModificationDescriptor,
    PSECURITY_DESCRIPTOR* ObjectsSecurityDescriptor,
    SECURITY_AUTO_INHERIT_FLAGS AutoInheritFlags,
    GENERIC_MAPPING* GenericMapping,
    HANDLE Token   // optional
);

<DllImport("ADVAPI32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function SetPrivateObjectSecurityEx(
    SecurityInformation As UInteger,   ' OBJECT_SECURITY_INFORMATION
    ModificationDescriptor As IntPtr,   ' PSECURITY_DESCRIPTOR
    ObjectsSecurityDescriptor As IntPtr,   ' PSECURITY_DESCRIPTOR* in/out
    AutoInheritFlags As UInteger,   ' SECURITY_AUTO_INHERIT_FLAGS
    GenericMapping As IntPtr,   ' GENERIC_MAPPING*
    Token As IntPtr   ' HANDLE optional
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' SecurityInformation : OBJECT_SECURITY_INFORMATION
' ModificationDescriptor : PSECURITY_DESCRIPTOR
' ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out
' AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS
' GenericMapping : GENERIC_MAPPING*
' Token : HANDLE optional
Declare PtrSafe Function SetPrivateObjectSecurityEx Lib "advapi32" ( _
    ByVal SecurityInformation As Long, _
    ByVal ModificationDescriptor As LongPtr, _
    ByVal ObjectsSecurityDescriptor As LongPtr, _
    ByVal AutoInheritFlags As Long, _
    ByVal GenericMapping As LongPtr, _
    ByVal Token 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

SetPrivateObjectSecurityEx = ctypes.windll.advapi32.SetPrivateObjectSecurityEx
SetPrivateObjectSecurityEx.restype = wintypes.BOOL
SetPrivateObjectSecurityEx.argtypes = [
    wintypes.DWORD,  # SecurityInformation : OBJECT_SECURITY_INFORMATION
    wintypes.HANDLE,  # ModificationDescriptor : PSECURITY_DESCRIPTOR
    ctypes.c_void_p,  # ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out
    wintypes.DWORD,  # AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS
    ctypes.c_void_p,  # GenericMapping : GENERIC_MAPPING*
    wintypes.HANDLE,  # Token : HANDLE optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
SetPrivateObjectSecurityEx = Fiddle::Function.new(
  lib['SetPrivateObjectSecurityEx'],
  [
    -Fiddle::TYPE_INT,  # SecurityInformation : OBJECT_SECURITY_INFORMATION
    Fiddle::TYPE_VOIDP,  # ModificationDescriptor : PSECURITY_DESCRIPTOR
    Fiddle::TYPE_VOIDP,  # ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out
    -Fiddle::TYPE_INT,  # AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS
    Fiddle::TYPE_VOIDP,  # GenericMapping : GENERIC_MAPPING*
    Fiddle::TYPE_VOIDP,  # Token : HANDLE optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn SetPrivateObjectSecurityEx(
        SecurityInformation: u32,  // OBJECT_SECURITY_INFORMATION
        ModificationDescriptor: *mut core::ffi::c_void,  // PSECURITY_DESCRIPTOR
        ObjectsSecurityDescriptor: *mut *mut core::ffi::c_void,  // PSECURITY_DESCRIPTOR* in/out
        AutoInheritFlags: u32,  // SECURITY_AUTO_INHERIT_FLAGS
        GenericMapping: *mut GENERIC_MAPPING,  // GENERIC_MAPPING*
        Token: *mut core::ffi::c_void  // HANDLE optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", SetLastError = true)]
public static extern bool SetPrivateObjectSecurityEx(uint SecurityInformation, IntPtr ModificationDescriptor, IntPtr ObjectsSecurityDescriptor, uint AutoInheritFlags, IntPtr GenericMapping, IntPtr Token);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_SetPrivateObjectSecurityEx' -Namespace Win32 -PassThru
# $api::SetPrivateObjectSecurityEx(SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token)

#uselib "ADVAPI32.dll"
#func global SetPrivateObjectSecurityEx "SetPrivateObjectSecurityEx" sptr, sptr, sptr, sptr, sptr, sptr
; SetPrivateObjectSecurityEx SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, varptr(GenericMapping), Token   ; 戻り値は stat
; SecurityInformation : OBJECT_SECURITY_INFORMATION -> "sptr"
; ModificationDescriptor : PSECURITY_DESCRIPTOR -> "sptr"
; ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> "sptr"
; AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> "sptr"
; GenericMapping : GENERIC_MAPPING* -> "sptr"
; Token : HANDLE 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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procSetPrivateObjectSecurityEx = advapi32.NewProc("SetPrivateObjectSecurityEx")
)

// SecurityInformation (OBJECT_SECURITY_INFORMATION), ModificationDescriptor (PSECURITY_DESCRIPTOR), ObjectsSecurityDescriptor (PSECURITY_DESCRIPTOR* in/out), AutoInheritFlags (SECURITY_AUTO_INHERIT_FLAGS), GenericMapping (GENERIC_MAPPING*), Token (HANDLE optional)
r1, _, err := procSetPrivateObjectSecurityEx.Call(
	uintptr(SecurityInformation),
	uintptr(ModificationDescriptor),
	uintptr(ObjectsSecurityDescriptor),
	uintptr(AutoInheritFlags),
	uintptr(GenericMapping),
	uintptr(Token),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function SetPrivateObjectSecurityEx(
  SecurityInformation: DWORD;   // OBJECT_SECURITY_INFORMATION
  ModificationDescriptor: THandle;   // PSECURITY_DESCRIPTOR
  ObjectsSecurityDescriptor: Pointer;   // PSECURITY_DESCRIPTOR* in/out
  AutoInheritFlags: DWORD;   // SECURITY_AUTO_INHERIT_FLAGS
  GenericMapping: Pointer;   // GENERIC_MAPPING*
  Token: THandle   // HANDLE optional
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'SetPrivateObjectSecurityEx';

result := DllCall("ADVAPI32\SetPrivateObjectSecurityEx"
    , "UInt", SecurityInformation   ; OBJECT_SECURITY_INFORMATION
    , "Ptr", ModificationDescriptor   ; PSECURITY_DESCRIPTOR
    , "Ptr", ObjectsSecurityDescriptor   ; PSECURITY_DESCRIPTOR* in/out
    , "UInt", AutoInheritFlags   ; SECURITY_AUTO_INHERIT_FLAGS
    , "Ptr", GenericMapping   ; GENERIC_MAPPING*
    , "Ptr", Token   ; HANDLE optional
    , "Int")   ; return: BOOL

●SetPrivateObjectSecurityEx(SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token) = DLL("ADVAPI32.dll", "bool SetPrivateObjectSecurityEx(dword, void*, void*, dword, void*, void*)")
# 呼び出し: SetPrivateObjectSecurityEx(SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token)
# SecurityInformation : OBJECT_SECURITY_INFORMATION -> "dword"
# ModificationDescriptor : PSECURITY_DESCRIPTOR -> "void*"
# ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> "void*"
# AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> "dword"
# GenericMapping : GENERIC_MAPPING* -> "void*"
# Token : HANDLE optional -> "void*"
# 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 "advapi32" fn SetPrivateObjectSecurityEx(
    SecurityInformation: u32, // OBJECT_SECURITY_INFORMATION
    ModificationDescriptor: ?*anyopaque, // PSECURITY_DESCRIPTOR
    ObjectsSecurityDescriptor: ?*anyopaque, // PSECURITY_DESCRIPTOR* in/out
    AutoInheritFlags: u32, // SECURITY_AUTO_INHERIT_FLAGS
    GenericMapping: [*c]GENERIC_MAPPING, // GENERIC_MAPPING*
    Token: ?*anyopaque // HANDLE optional
) callconv(std.os.windows.WINAPI) i32;

proc SetPrivateObjectSecurityEx(
    SecurityInformation: uint32,  # OBJECT_SECURITY_INFORMATION
    ModificationDescriptor: pointer,  # PSECURITY_DESCRIPTOR
    ObjectsSecurityDescriptor: pointer,  # PSECURITY_DESCRIPTOR* in/out
    AutoInheritFlags: uint32,  # SECURITY_AUTO_INHERIT_FLAGS
    GenericMapping: ptr GENERIC_MAPPING,  # GENERIC_MAPPING*
    Token: pointer  # HANDLE optional
): int32 {.importc: "SetPrivateObjectSecurityEx", stdcall, dynlib: "ADVAPI32.dll".}

pragma(lib, "advapi32");
extern(Windows)
int SetPrivateObjectSecurityEx(
    uint SecurityInformation,   // OBJECT_SECURITY_INFORMATION
    void* ModificationDescriptor,   // PSECURITY_DESCRIPTOR
    void* ObjectsSecurityDescriptor,   // PSECURITY_DESCRIPTOR* in/out
    uint AutoInheritFlags,   // SECURITY_AUTO_INHERIT_FLAGS
    GENERIC_MAPPING* GenericMapping,   // GENERIC_MAPPING*
    void* Token   // HANDLE optional
);

ccall((:SetPrivateObjectSecurityEx, "ADVAPI32.dll"), stdcall, Int32,
      (UInt32, Ptr{Cvoid}, Ptr{Cvoid}, UInt32, Ptr{GENERIC_MAPPING}, Ptr{Cvoid}),
      SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token)
# SecurityInformation : OBJECT_SECURITY_INFORMATION -> UInt32
# ModificationDescriptor : PSECURITY_DESCRIPTOR -> Ptr{Cvoid}
# ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> Ptr{Cvoid}
# AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> UInt32
# GenericMapping : GENERIC_MAPPING* -> Ptr{GENERIC_MAPPING}
# Token : HANDLE optional -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t SetPrivateObjectSecurityEx(
    uint32_t SecurityInformation,
    void* ModificationDescriptor,
    void* ObjectsSecurityDescriptor,
    uint32_t AutoInheritFlags,
    void* GenericMapping,
    void* Token);
]]
local advapi32 = ffi.load("advapi32")
-- advapi32.SetPrivateObjectSecurityEx(SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token)
-- SecurityInformation : OBJECT_SECURITY_INFORMATION
-- ModificationDescriptor : PSECURITY_DESCRIPTOR
-- ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out
-- AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS
-- GenericMapping : GENERIC_MAPPING*
-- Token : HANDLE 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('ADVAPI32.dll');
const SetPrivateObjectSecurityEx = lib.func('__stdcall', 'SetPrivateObjectSecurityEx', 'int32_t', ['uint32_t', 'void *', 'void *', 'uint32_t', 'void *', 'void *']);
// SetPrivateObjectSecurityEx(SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token)
// SecurityInformation : OBJECT_SECURITY_INFORMATION -> 'uint32_t'
// ModificationDescriptor : PSECURITY_DESCRIPTOR -> 'void *'
// ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> 'void *'
// AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> 'uint32_t'
// GenericMapping : GENERIC_MAPPING* -> 'void *'
// Token : HANDLE optional -> 'void *'
// 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("ADVAPI32.dll", {
  SetPrivateObjectSecurityEx: { parameters: ["u32", "pointer", "pointer", "u32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.SetPrivateObjectSecurityEx(SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token)
// SecurityInformation : OBJECT_SECURITY_INFORMATION -> "u32"
// ModificationDescriptor : PSECURITY_DESCRIPTOR -> "pointer"
// ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> "pointer"
// AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> "u32"
// GenericMapping : GENERIC_MAPPING* -> "pointer"
// Token : HANDLE optional -> "pointer"
// 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 SetPrivateObjectSecurityEx(
    uint32_t SecurityInformation,
    void* ModificationDescriptor,
    void* ObjectsSecurityDescriptor,
    uint32_t AutoInheritFlags,
    void* GenericMapping,
    void* Token);
C, "ADVAPI32.dll");
// $ffi->SetPrivateObjectSecurityEx(SecurityInformation, ModificationDescriptor, ObjectsSecurityDescriptor, AutoInheritFlags, GenericMapping, Token);
// SecurityInformation : OBJECT_SECURITY_INFORMATION
// ModificationDescriptor : PSECURITY_DESCRIPTOR
// ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out
// AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS
// GenericMapping : GENERIC_MAPPING*
// Token : HANDLE 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 Advapi32 extends StdCallLibrary {
    Advapi32 INSTANCE = Native.load("advapi32", Advapi32.class);
    boolean SetPrivateObjectSecurityEx(
        int SecurityInformation,   // OBJECT_SECURITY_INFORMATION
        Pointer ModificationDescriptor,   // PSECURITY_DESCRIPTOR
        Pointer ObjectsSecurityDescriptor,   // PSECURITY_DESCRIPTOR* in/out
        int AutoInheritFlags,   // SECURITY_AUTO_INHERIT_FLAGS
        Pointer GenericMapping,   // GENERIC_MAPPING*
        Pointer Token   // HANDLE optional
    );
}

@[Link("advapi32")]
lib LibADVAPI32
  fun SetPrivateObjectSecurityEx = SetPrivateObjectSecurityEx(
    SecurityInformation : UInt32,   # OBJECT_SECURITY_INFORMATION
    ModificationDescriptor : Void*,   # PSECURITY_DESCRIPTOR
    ObjectsSecurityDescriptor : Void*,   # PSECURITY_DESCRIPTOR* in/out
    AutoInheritFlags : UInt32,   # SECURITY_AUTO_INHERIT_FLAGS
    GenericMapping : GENERIC_MAPPING*,   # GENERIC_MAPPING*
    Token : Void*   # HANDLE 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 SetPrivateObjectSecurityExNative = Int32 Function(Uint32, Pointer<Void>, Pointer<Void>, Uint32, Pointer<Void>, Pointer<Void>);
typedef SetPrivateObjectSecurityExDart = int Function(int, Pointer<Void>, Pointer<Void>, int, Pointer<Void>, Pointer<Void>);
final SetPrivateObjectSecurityEx = DynamicLibrary.open('ADVAPI32.dll')
    .lookupFunction<SetPrivateObjectSecurityExNative, SetPrivateObjectSecurityExDart>('SetPrivateObjectSecurityEx');
// SecurityInformation : OBJECT_SECURITY_INFORMATION -> Uint32
// ModificationDescriptor : PSECURITY_DESCRIPTOR -> Pointer<Void>
// ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> Pointer<Void>
// AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> Uint32
// GenericMapping : GENERIC_MAPPING* -> Pointer<Void>
// Token : HANDLE optional -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SetPrivateObjectSecurityEx(
  SecurityInformation: DWORD;   // OBJECT_SECURITY_INFORMATION
  ModificationDescriptor: THandle;   // PSECURITY_DESCRIPTOR
  ObjectsSecurityDescriptor: Pointer;   // PSECURITY_DESCRIPTOR* in/out
  AutoInheritFlags: DWORD;   // SECURITY_AUTO_INHERIT_FLAGS
  GenericMapping: Pointer;   // GENERIC_MAPPING*
  Token: THandle   // HANDLE optional
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'SetPrivateObjectSecurityEx';

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

foreign import stdcall safe "SetPrivateObjectSecurityEx"
  c_SetPrivateObjectSecurityEx :: Word32 -> Ptr () -> Ptr () -> Word32 -> Ptr () -> Ptr () -> IO CInt
-- SecurityInformation : OBJECT_SECURITY_INFORMATION -> Word32
-- ModificationDescriptor : PSECURITY_DESCRIPTOR -> Ptr ()
-- ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> Ptr ()
-- AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> Word32
-- GenericMapping : GENERIC_MAPPING* -> Ptr ()
-- Token : HANDLE optional -> Ptr ()
-- 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 setprivateobjectsecurityex =
  foreign "SetPrivateObjectSecurityEx"
    (uint32_t @-> (ptr void) @-> (ptr void) @-> uint32_t @-> (ptr void) @-> (ptr void) @-> returning int32_t)
(* SecurityInformation : OBJECT_SECURITY_INFORMATION -> uint32_t *)
(* ModificationDescriptor : PSECURITY_DESCRIPTOR -> (ptr void) *)
(* ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> (ptr void) *)
(* AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> uint32_t *)
(* GenericMapping : GENERIC_MAPPING* -> (ptr void) *)
(* Token : HANDLE optional -> (ptr void) *)
(* 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 advapi32 (t "ADVAPI32.dll"))
(cffi:use-foreign-library advapi32)

(cffi:defcfun ("SetPrivateObjectSecurityEx" set-private-object-security-ex :convention :stdcall) :int32
  (security-information :uint32)   ; OBJECT_SECURITY_INFORMATION
  (modification-descriptor :pointer)   ; PSECURITY_DESCRIPTOR
  (objects-security-descriptor :pointer)   ; PSECURITY_DESCRIPTOR* in/out
  (auto-inherit-flags :uint32)   ; SECURITY_AUTO_INHERIT_FLAGS
  (generic-mapping :pointer)   ; GENERIC_MAPPING*
  (token :pointer))   ; HANDLE optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SetPrivateObjectSecurityEx = Win32::API::More->new('ADVAPI32',
    'BOOL SetPrivateObjectSecurityEx(DWORD SecurityInformation, HANDLE ModificationDescriptor, HANDLE ObjectsSecurityDescriptor, DWORD AutoInheritFlags, LPVOID GenericMapping, HANDLE Token)');
# my $ret = $SetPrivateObjectSecurityEx->Call($SecurityInformation, $ModificationDescriptor, $ObjectsSecurityDescriptor, $AutoInheritFlags, $GenericMapping, $Token);
# SecurityInformation : OBJECT_SECURITY_INFORMATION -> DWORD
# ModificationDescriptor : PSECURITY_DESCRIPTOR -> HANDLE
# ObjectsSecurityDescriptor : PSECURITY_DESCRIPTOR* in/out -> HANDLE
# AutoInheritFlags : SECURITY_AUTO_INHERIT_FLAGS -> DWORD
# GenericMapping : GENERIC_MAPPING* -> LPVOID
# Token : HANDLE optional -> HANDLE
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。