VariantTimeToDosDateTime

// OLEAUT32.dll
#include <windows.h>

INT VariantTimeToDosDateTime(
    DOUBLE vtime,
    WORD* pwDosDate,
    WORD* pwDosTime
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VariantTimeToDosDateTime(
    vtime As Double,   ' DOUBLE
    <Out> ByRef pwDosDate As UShort,   ' WORD* out
    <Out> ByRef pwDosTime As UShort   ' WORD* out
) As Integer
End Function

' vtime : DOUBLE
' pwDosDate : WORD* out
' pwDosTime : WORD* out
Declare PtrSafe Function VariantTimeToDosDateTime Lib "oleaut32" ( _
    ByVal vtime As Double, _
    ByRef pwDosDate As Integer, _
    ByRef pwDosTime As Integer) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VariantTimeToDosDateTime = ctypes.windll.oleaut32.VariantTimeToDosDateTime
VariantTimeToDosDateTime.restype = ctypes.c_int
VariantTimeToDosDateTime.argtypes = [
    ctypes.c_double,  # vtime : DOUBLE
    ctypes.POINTER(ctypes.c_ushort),  # pwDosDate : WORD* out
    ctypes.POINTER(ctypes.c_ushort),  # pwDosTime : WORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VariantTimeToDosDateTime = Fiddle::Function.new(
  lib['VariantTimeToDosDateTime'],
  [
    Fiddle::TYPE_DOUBLE,  # vtime : DOUBLE
    Fiddle::TYPE_VOIDP,  # pwDosDate : WORD* out
    Fiddle::TYPE_VOIDP,  # pwDosTime : WORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VariantTimeToDosDateTime(
        vtime: f64,  // DOUBLE
        pwDosDate: *mut u16,  // WORD* out
        pwDosTime: *mut u16  // WORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VariantTimeToDosDateTime(double vtime, out ushort pwDosDate, out ushort pwDosTime);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VariantTimeToDosDateTime' -Namespace Win32 -PassThru
# $api::VariantTimeToDosDateTime(vtime, pwDosDate, pwDosTime)

#uselib "OLEAUT32.dll"
#func global VariantTimeToDosDateTime "VariantTimeToDosDateTime" double, sptr, sptr
; VariantTimeToDosDateTime vtime, varptr(pwDosDate), varptr(pwDosTime)   ; 戻り値は stat
; vtime : DOUBLE -> "double"
; pwDosDate : WORD* out -> "sptr"
; pwDosTime : WORD* out -> "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 (
	"math"
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVariantTimeToDosDateTime = oleaut32.NewProc("VariantTimeToDosDateTime")
)

// vtime (DOUBLE), pwDosDate (WORD* out), pwDosTime (WORD* out)
r1, _, err := procVariantTimeToDosDateTime.Call(
	uintptr(math.Float64bits(vtime)),
	uintptr(pwDosDate),
	uintptr(pwDosTime),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT
// 注意: float/double 引数は proc.Call では XMM レジスタに渡せません。
// windows.SyscallN(proc.Addr(), math.Float64bits(x), ...) もしくは cgo を使用してください。

function VariantTimeToDosDateTime(
  vtime: Double;   // DOUBLE
  pwDosDate: Pointer;   // WORD* out
  pwDosTime: Pointer   // WORD* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VariantTimeToDosDateTime';

result := DllCall("OLEAUT32\VariantTimeToDosDateTime"
    , "Double", vtime   ; DOUBLE
    , "Ptr", pwDosDate   ; WORD* out
    , "Ptr", pwDosTime   ; WORD* out
    , "Int")   ; return: INT

●VariantTimeToDosDateTime(vtime, pwDosDate, pwDosTime) = DLL("OLEAUT32.dll", "int VariantTimeToDosDateTime(double, void*, void*)")
# 呼び出し: VariantTimeToDosDateTime(vtime, pwDosDate, pwDosTime)
# vtime : DOUBLE -> "double"
# pwDosDate : WORD* out -> "void*"
# pwDosTime : WORD* out -> "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 "oleaut32" fn VariantTimeToDosDateTime(
    vtime: f64, // DOUBLE
    pwDosDate: [*c]u16, // WORD* out
    pwDosTime: [*c]u16 // WORD* out
) callconv(std.os.windows.WINAPI) i32;

proc VariantTimeToDosDateTime(
    vtime: float64,  # DOUBLE
    pwDosDate: ptr uint16,  # WORD* out
    pwDosTime: ptr uint16  # WORD* out
): int32 {.importc: "VariantTimeToDosDateTime", stdcall, dynlib: "OLEAUT32.dll".}

pragma(lib, "oleaut32");
extern(Windows)
int VariantTimeToDosDateTime(
    double vtime,   // DOUBLE
    ushort* pwDosDate,   // WORD* out
    ushort* pwDosTime   // WORD* out
);

ccall((:VariantTimeToDosDateTime, "OLEAUT32.dll"), stdcall, Int32,
      (Float64, Ptr{UInt16}, Ptr{UInt16}),
      vtime, pwDosDate, pwDosTime)
# vtime : DOUBLE -> Float64
# pwDosDate : WORD* out -> Ptr{UInt16}
# pwDosTime : WORD* out -> Ptr{UInt16}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t VariantTimeToDosDateTime(
    double vtime,
    uint16_t* pwDosDate,
    uint16_t* pwDosTime);
]]
local oleaut32 = ffi.load("oleaut32")
-- oleaut32.VariantTimeToDosDateTime(vtime, pwDosDate, pwDosTime)
-- vtime : DOUBLE
-- pwDosDate : WORD* out
-- pwDosTime : WORD* out
-- 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('OLEAUT32.dll');
const VariantTimeToDosDateTime = lib.func('__stdcall', 'VariantTimeToDosDateTime', 'int32_t', ['double', 'uint16_t *', 'uint16_t *']);
// VariantTimeToDosDateTime(vtime, pwDosDate, pwDosTime)
// vtime : DOUBLE -> 'double'
// pwDosDate : WORD* out -> 'uint16_t *'
// pwDosTime : WORD* out -> 'uint16_t *'
// 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("OLEAUT32.dll", {
  VariantTimeToDosDateTime: { parameters: ["f64", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.VariantTimeToDosDateTime(vtime, pwDosDate, pwDosTime)
// vtime : DOUBLE -> "f64"
// pwDosDate : WORD* out -> "pointer"
// pwDosTime : WORD* out -> "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 VariantTimeToDosDateTime(
    double vtime,
    uint16_t* pwDosDate,
    uint16_t* pwDosTime);
C, "OLEAUT32.dll");
// $ffi->VariantTimeToDosDateTime(vtime, pwDosDate, pwDosTime);
// vtime : DOUBLE
// pwDosDate : WORD* out
// pwDosTime : WORD* out
// 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 Oleaut32 extends StdCallLibrary {
    Oleaut32 INSTANCE = Native.load("oleaut32", Oleaut32.class);
    int VariantTimeToDosDateTime(
        double vtime,   // DOUBLE
        ShortByReference pwDosDate,   // WORD* out
        ShortByReference pwDosTime   // WORD* out
    );
}

@[Link("oleaut32")]
lib LibOLEAUT32
  fun VariantTimeToDosDateTime = VariantTimeToDosDateTime(
    vtime : Float64,   # DOUBLE
    pwDosDate : UInt16*,   # WORD* out
    pwDosTime : UInt16*   # WORD* out
  ) : 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 VariantTimeToDosDateTimeNative = Int32 Function(Double, Pointer<Uint16>, Pointer<Uint16>);
typedef VariantTimeToDosDateTimeDart = int Function(double, Pointer<Uint16>, Pointer<Uint16>);
final VariantTimeToDosDateTime = DynamicLibrary.open('OLEAUT32.dll')
    .lookupFunction<VariantTimeToDosDateTimeNative, VariantTimeToDosDateTimeDart>('VariantTimeToDosDateTime');
// vtime : DOUBLE -> Double
// pwDosDate : WORD* out -> Pointer<Uint16>
// pwDosTime : WORD* out -> Pointer<Uint16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function VariantTimeToDosDateTime(
  vtime: Double;   // DOUBLE
  pwDosDate: Pointer;   // WORD* out
  pwDosTime: Pointer   // WORD* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VariantTimeToDosDateTime';

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

foreign import stdcall safe "VariantTimeToDosDateTime"
  c_VariantTimeToDosDateTime :: CDouble -> Ptr Word16 -> Ptr Word16 -> IO Int32
-- vtime : DOUBLE -> CDouble
-- pwDosDate : WORD* out -> Ptr Word16
-- pwDosTime : WORD* out -> Ptr Word16
-- 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 varianttimetodosdatetime =
  foreign "VariantTimeToDosDateTime"
    (double @-> (ptr uint16_t) @-> (ptr uint16_t) @-> returning int32_t)
(* vtime : DOUBLE -> double *)
(* pwDosDate : WORD* out -> (ptr uint16_t) *)
(* pwDosTime : WORD* out -> (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 oleaut32 (t "OLEAUT32.dll"))
(cffi:use-foreign-library oleaut32)

(cffi:defcfun ("VariantTimeToDosDateTime" variant-time-to-dos-date-time :convention :stdcall) :int32
  (vtime :double)   ; DOUBLE
  (pw-dos-date :pointer)   ; WORD* out
  (pw-dos-time :pointer))   ; WORD* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $VariantTimeToDosDateTime = Win32::API::More->new('OLEAUT32',
    'int VariantTimeToDosDateTime(double vtime, LPVOID pwDosDate, LPVOID pwDosTime)');
# my $ret = $VariantTimeToDosDateTime->Call($vtime, $pwDosDate, $pwDosTime);
# vtime : DOUBLE -> double
# pwDosDate : WORD* out -> LPVOID
# pwDosTime : WORD* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。