VarDateFromI4

関数

INT値をDATE型の日付値に変換する。

DLLOLEAUT32.dll呼出規約winapi

シグネチャ

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

HRESULT VarDateFromI4(
    INT lIn,
    DOUBLE* pdateOut
);

パラメーター

名前	型	方向
lIn	INT	in
pdateOut	DOUBLE*	out

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT VarDateFromI4(
    INT lIn,
    DOUBLE* pdateOut
);

[DllImport("OLEAUT32.dll", ExactSpelling = true)]
static extern int VarDateFromI4(
    int lIn,   // INT
    out double pdateOut   // DOUBLE* out
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarDateFromI4(
    lIn As Integer,   ' INT
    <Out> ByRef pdateOut As Double   ' DOUBLE* out
) As Integer
End Function

' lIn : INT
' pdateOut : DOUBLE* out
Declare PtrSafe Function VarDateFromI4 Lib "oleaut32" ( _
    ByVal lIn As Long, _
    ByRef pdateOut As Double) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarDateFromI4 = ctypes.windll.oleaut32.VarDateFromI4
VarDateFromI4.restype = ctypes.c_int
VarDateFromI4.argtypes = [
    ctypes.c_int,  # lIn : INT
    ctypes.POINTER(ctypes.c_double),  # pdateOut : DOUBLE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarDateFromI4 = Fiddle::Function.new(
  lib['VarDateFromI4'],
  [
    Fiddle::TYPE_INT,  # lIn : INT
    Fiddle::TYPE_VOIDP,  # pdateOut : DOUBLE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarDateFromI4(
        lIn: i32,  // INT
        pdateOut: *mut f64  // DOUBLE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarDateFromI4(int lIn, out double pdateOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarDateFromI4' -Namespace Win32 -PassThru
# $api::VarDateFromI4(lIn, pdateOut)

#uselib "OLEAUT32.dll"
#func global VarDateFromI4 "VarDateFromI4" sptr, sptr
; VarDateFromI4 lIn, varptr(pdateOut)   ; 戻り値は stat
; lIn : INT -> "sptr"
; pdateOut : DOUBLE* 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。

出力引数:

#uselib "OLEAUT32.dll"
#cfunc global VarDateFromI4 "VarDateFromI4" int, var
; res = VarDateFromI4(lIn, pdateOut)
; lIn : INT -> "int"
; pdateOut : DOUBLE* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "OLEAUT32.dll"
#cfunc global VarDateFromI4 "VarDateFromI4" int, sptr
; res = VarDateFromI4(lIn, varptr(pdateOut))
; lIn : INT -> "int"
; pdateOut : DOUBLE* out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HRESULT VarDateFromI4(INT lIn, DOUBLE* pdateOut)
#uselib "OLEAUT32.dll"
#cfunc global VarDateFromI4 "VarDateFromI4" int, var
; res = VarDateFromI4(lIn, pdateOut)
; lIn : INT -> "int"
; pdateOut : DOUBLE* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; HRESULT VarDateFromI4(INT lIn, DOUBLE* pdateOut)
#uselib "OLEAUT32.dll"
#cfunc global VarDateFromI4 "VarDateFromI4" int, intptr
; res = VarDateFromI4(lIn, varptr(pdateOut))
; lIn : INT -> "int"
; pdateOut : DOUBLE* out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarDateFromI4 = oleaut32.NewProc("VarDateFromI4")
)

// lIn (INT), pdateOut (DOUBLE* out)
r1, _, err := procVarDateFromI4.Call(
	uintptr(lIn),
	uintptr(pdateOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarDateFromI4(
  lIn: Integer;   // INT
  pdateOut: Pointer   // DOUBLE* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarDateFromI4';

result := DllCall("OLEAUT32\VarDateFromI4"
    , "Int", lIn   ; INT
    , "Ptr", pdateOut   ; DOUBLE* out
    , "Int")   ; return: HRESULT

●VarDateFromI4(lIn, pdateOut) = DLL("OLEAUT32.dll", "int VarDateFromI4(int, void*)")
# 呼び出し: VarDateFromI4(lIn, pdateOut)
# lIn : INT -> "int"
# pdateOut : DOUBLE* 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)。