VarR4FromBool

関数

VARIANT_BOOL値をFLOAT（単精度浮動小数点数）に変換する。

DLLOLEAUT32.dll呼出規約winapi

シグネチャ

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

HRESULT VarR4FromBool(
    VARIANT_BOOL boolIn,
    FLOAT* pfltOut
);

パラメーター

名前	型	方向	説明
boolIn	VARIANT_BOOL	in	変換元のVARIANT_BOOL値(TRUE=-1, FALSE=0)。
pfltOut	FLOAT*	out	変換後のFLOAT(R4)値を受け取る出力ポインタ。NULL不可。

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT VarR4FromBool(
    VARIANT_BOOL boolIn,
    FLOAT* pfltOut
);

[DllImport("OLEAUT32.dll", ExactSpelling = true)]
static extern int VarR4FromBool(
    short boolIn,   // VARIANT_BOOL
    out float pfltOut   // FLOAT* out
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarR4FromBool(
    boolIn As Short,   ' VARIANT_BOOL
    <Out> ByRef pfltOut As Single   ' FLOAT* out
) As Integer
End Function

' boolIn : VARIANT_BOOL
' pfltOut : FLOAT* out
Declare PtrSafe Function VarR4FromBool Lib "oleaut32" ( _
    ByVal boolIn As Integer, _
    ByRef pfltOut As Single) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarR4FromBool = ctypes.windll.oleaut32.VarR4FromBool
VarR4FromBool.restype = ctypes.c_int
VarR4FromBool.argtypes = [
    ctypes.c_short,  # boolIn : VARIANT_BOOL
    ctypes.POINTER(ctypes.c_float),  # pfltOut : FLOAT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarR4FromBool = Fiddle::Function.new(
  lib['VarR4FromBool'],
  [
    Fiddle::TYPE_SHORT,  # boolIn : VARIANT_BOOL
    Fiddle::TYPE_VOIDP,  # pfltOut : FLOAT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarR4FromBool(
        boolIn: i16,  // VARIANT_BOOL
        pfltOut: *mut f32  // FLOAT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarR4FromBool(short boolIn, out float pfltOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarR4FromBool' -Namespace Win32 -PassThru
# $api::VarR4FromBool(boolIn, pfltOut)

#uselib "OLEAUT32.dll"
#func global VarR4FromBool "VarR4FromBool" sptr, sptr
; VarR4FromBool boolIn, varptr(pfltOut)   ; 戻り値は stat
; boolIn : VARIANT_BOOL -> "sptr"
; pfltOut : FLOAT* 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 VarR4FromBool "VarR4FromBool" int, var
; res = VarR4FromBool(boolIn, pfltOut)
; boolIn : VARIANT_BOOL -> "int"
; pfltOut : FLOAT* 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 VarR4FromBool "VarR4FromBool" int, sptr
; res = VarR4FromBool(boolIn, varptr(pfltOut))
; boolIn : VARIANT_BOOL -> "int"
; pfltOut : FLOAT* 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 VarR4FromBool(VARIANT_BOOL boolIn, FLOAT* pfltOut)
#uselib "OLEAUT32.dll"
#cfunc global VarR4FromBool "VarR4FromBool" int, var
; res = VarR4FromBool(boolIn, pfltOut)
; boolIn : VARIANT_BOOL -> "int"
; pfltOut : FLOAT* 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 VarR4FromBool(VARIANT_BOOL boolIn, FLOAT* pfltOut)
#uselib "OLEAUT32.dll"
#cfunc global VarR4FromBool "VarR4FromBool" int, intptr
; res = VarR4FromBool(boolIn, varptr(pfltOut))
; boolIn : VARIANT_BOOL -> "int"
; pfltOut : FLOAT* 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")
	procVarR4FromBool = oleaut32.NewProc("VarR4FromBool")
)

// boolIn (VARIANT_BOOL), pfltOut (FLOAT* out)
r1, _, err := procVarR4FromBool.Call(
	uintptr(boolIn),
	uintptr(pfltOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarR4FromBool(
  boolIn: Smallint;   // VARIANT_BOOL
  pfltOut: Pointer   // FLOAT* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarR4FromBool';

result := DllCall("OLEAUT32\VarR4FromBool"
    , "Short", boolIn   ; VARIANT_BOOL
    , "Ptr", pfltOut   ; FLOAT* out
    , "Int")   ; return: HRESULT

●VarR4FromBool(boolIn, pfltOut) = DLL("OLEAUT32.dll", "int VarR4FromBool(int, void*)")
# 呼び出し: VarR4FromBool(boolIn, pfltOut)
# boolIn : VARIANT_BOOL -> "int"
# pfltOut : FLOAT* 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)。