VarR8FromI4

関数

INT値をDOUBLE（倍精度浮動小数点数）に変換する。

DLLOLEAUT32.dll呼出規約winapi

シグネチャ

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

HRESULT VarR8FromI4(
    INT lIn,
    DOUBLE* pdblOut
);

パラメーター

名前	型	方向
lIn	INT	in
pdblOut	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 VarR8FromI4(
    INT lIn,
    DOUBLE* pdblOut
);

[DllImport("OLEAUT32.dll", ExactSpelling = true)]
static extern int VarR8FromI4(
    int lIn,   // INT
    out double pdblOut   // DOUBLE* out
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarR8FromI4(
    lIn As Integer,   ' INT
    <Out> ByRef pdblOut As Double   ' DOUBLE* out
) As Integer
End Function

' lIn : INT
' pdblOut : DOUBLE* out
Declare PtrSafe Function VarR8FromI4 Lib "oleaut32" ( _
    ByVal lIn As Long, _
    ByRef pdblOut 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

VarR8FromI4 = ctypes.windll.oleaut32.VarR8FromI4
VarR8FromI4.restype = ctypes.c_int
VarR8FromI4.argtypes = [
    ctypes.c_int,  # lIn : INT
    ctypes.POINTER(ctypes.c_double),  # pdblOut : DOUBLE* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarR8FromI4 = Fiddle::Function.new(
  lib['VarR8FromI4'],
  [
    Fiddle::TYPE_INT,  # lIn : INT
    Fiddle::TYPE_VOIDP,  # pdblOut : DOUBLE* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarR8FromI4(
        lIn: i32,  // INT
        pdblOut: *mut f64  // DOUBLE* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarR8FromI4(int lIn, out double pdblOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarR8FromI4' -Namespace Win32 -PassThru
# $api::VarR8FromI4(lIn, pdblOut)

#uselib "OLEAUT32.dll"
#func global VarR8FromI4 "VarR8FromI4" sptr, sptr
; VarR8FromI4 lIn, varptr(pdblOut)   ; 戻り値は stat
; lIn : INT -> "sptr"
; pdblOut : 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 VarR8FromI4 "VarR8FromI4" int, var
; res = VarR8FromI4(lIn, pdblOut)
; lIn : INT -> "int"
; pdblOut : 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 VarR8FromI4 "VarR8FromI4" int, sptr
; res = VarR8FromI4(lIn, varptr(pdblOut))
; lIn : INT -> "int"
; pdblOut : 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 VarR8FromI4(INT lIn, DOUBLE* pdblOut)
#uselib "OLEAUT32.dll"
#cfunc global VarR8FromI4 "VarR8FromI4" int, var
; res = VarR8FromI4(lIn, pdblOut)
; lIn : INT -> "int"
; pdblOut : 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 VarR8FromI4(INT lIn, DOUBLE* pdblOut)
#uselib "OLEAUT32.dll"
#cfunc global VarR8FromI4 "VarR8FromI4" int, intptr
; res = VarR8FromI4(lIn, varptr(pdblOut))
; lIn : INT -> "int"
; pdblOut : 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")
	procVarR8FromI4 = oleaut32.NewProc("VarR8FromI4")
)

// lIn (INT), pdblOut (DOUBLE* out)
r1, _, err := procVarR8FromI4.Call(
	uintptr(lIn),
	uintptr(pdblOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarR8FromI4(
  lIn: Integer;   // INT
  pdblOut: Pointer   // DOUBLE* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarR8FromI4';

result := DllCall("OLEAUT32\VarR8FromI4"
    , "Int", lIn   ; INT
    , "Ptr", pdblOut   ; DOUBLE* out
    , "Int")   ; return: HRESULT

●VarR8FromI4(lIn, pdblOut) = DLL("OLEAUT32.dll", "int VarR8FromI4(int, void*)")
# 呼び出し: VarR8FromI4(lIn, pdblOut)
# lIn : INT -> "int"
# pdblOut : 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)。