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PropVariantToDoubleWithDefault

関数

PROPVARIANTを倍精度浮動小数点へ変換し失敗時は既定値を返す。

DLLPROPSYS.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

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

DOUBLE PropVariantToDoubleWithDefault(
    const PROPVARIANT* propvarIn,
    DOUBLE dblDefault
);

パラメーター

名前	型	方向
propvarIn	PROPVARIANT*	in
dblDefault	DOUBLE	in

戻り値の型: DOUBLE

各言語での呼び出し定義

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

DOUBLE PropVariantToDoubleWithDefault(
    const PROPVARIANT* propvarIn,
    DOUBLE dblDefault
);

[DllImport("PROPSYS.dll", ExactSpelling = true)]
static extern double PropVariantToDoubleWithDefault(
    IntPtr propvarIn,   // PROPVARIANT*
    double dblDefault   // DOUBLE
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function PropVariantToDoubleWithDefault(
    propvarIn As IntPtr,   ' PROPVARIANT*
    dblDefault As Double   ' DOUBLE
) As Double
End Function

' propvarIn : PROPVARIANT*
' dblDefault : DOUBLE
Declare PtrSafe Function PropVariantToDoubleWithDefault Lib "propsys" ( _
    ByVal propvarIn As LongPtr, _
    ByVal dblDefault As Double) As Double
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PropVariantToDoubleWithDefault = ctypes.windll.propsys.PropVariantToDoubleWithDefault
PropVariantToDoubleWithDefault.restype = ctypes.c_double
PropVariantToDoubleWithDefault.argtypes = [
    ctypes.c_void_p,  # propvarIn : PROPVARIANT*
    ctypes.c_double,  # dblDefault : DOUBLE
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
PropVariantToDoubleWithDefault = Fiddle::Function.new(
  lib['PropVariantToDoubleWithDefault'],
  [
    Fiddle::TYPE_VOIDP,  # propvarIn : PROPVARIANT*
    Fiddle::TYPE_DOUBLE,  # dblDefault : DOUBLE
  ],
  Fiddle::TYPE_DOUBLE)

#[link(name = "propsys")]
extern "system" {
    fn PropVariantToDoubleWithDefault(
        propvarIn: *const PROPVARIANT,  // PROPVARIANT*
        dblDefault: f64  // DOUBLE
    ) -> f64;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern double PropVariantToDoubleWithDefault(IntPtr propvarIn, double dblDefault);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_PropVariantToDoubleWithDefault' -Namespace Win32 -PassThru
# $api::PropVariantToDoubleWithDefault(propvarIn, dblDefault)

#uselib "PROPSYS.dll"
#func global PropVariantToDoubleWithDefault "PropVariantToDoubleWithDefault" sptr, double
; PropVariantToDoubleWithDefault varptr(propvarIn), dblDefault   ; 戻り値は stat
; propvarIn : PROPVARIANT* -> "sptr"
; dblDefault : DOUBLE -> "double"
; ※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 "PROPSYS.dll"
#cfunc global PropVariantToDoubleWithDefault "PropVariantToDoubleWithDefault" var, double
; res = PropVariantToDoubleWithDefault(propvarIn, dblDefault)
; propvarIn : PROPVARIANT* -> "var"
; dblDefault : DOUBLE -> "double"
; ※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 "PROPSYS.dll"
#cfunc global PropVariantToDoubleWithDefault "PropVariantToDoubleWithDefault" sptr, double
; res = PropVariantToDoubleWithDefault(varptr(propvarIn), dblDefault)
; propvarIn : PROPVARIANT* -> "sptr"
; dblDefault : DOUBLE -> "double"
; ※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:

; DOUBLE PropVariantToDoubleWithDefault(PROPVARIANT* propvarIn, DOUBLE dblDefault)
#uselib "PROPSYS.dll"
#cfunc global PropVariantToDoubleWithDefault "PropVariantToDoubleWithDefault" var, double
; res = PropVariantToDoubleWithDefault(propvarIn, dblDefault)
; propvarIn : PROPVARIANT* -> "var"
; dblDefault : DOUBLE -> "double"
; ※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。; DOUBLE PropVariantToDoubleWithDefault(PROPVARIANT* propvarIn, DOUBLE dblDefault)
#uselib "PROPSYS.dll"
#cfunc global PropVariantToDoubleWithDefault "PropVariantToDoubleWithDefault" intptr, double
; res = PropVariantToDoubleWithDefault(varptr(propvarIn), dblDefault)
; propvarIn : PROPVARIANT* -> "intptr"
; dblDefault : DOUBLE -> "double"
; ※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 (
	"math"
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	propsys = windows.NewLazySystemDLL("PROPSYS.dll")
	procPropVariantToDoubleWithDefault = propsys.NewProc("PropVariantToDoubleWithDefault")
)

// propvarIn (PROPVARIANT*), dblDefault (DOUBLE)
r1, _, err := procPropVariantToDoubleWithDefault.Call(
	uintptr(propvarIn),
	uintptr(math.Float64bits(dblDefault)),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DOUBLE
// 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 PropVariantToDoubleWithDefault(
  propvarIn: Pointer;   // PROPVARIANT*
  dblDefault: Double   // DOUBLE
): Double; stdcall;
  external 'PROPSYS.dll' name 'PropVariantToDoubleWithDefault';

result := DllCall("PROPSYS\PropVariantToDoubleWithDefault"
    , "Ptr", propvarIn   ; PROPVARIANT*
    , "Double", dblDefault   ; DOUBLE
    , "Double")   ; return: DOUBLE

●PropVariantToDoubleWithDefault(propvarIn, dblDefault) = DLL("PROPSYS.dll", "double PropVariantToDoubleWithDefault(void*, double)")
# 呼び出し: PropVariantToDoubleWithDefault(propvarIn, dblDefault)
# propvarIn : PROPVARIANT* -> "void*"
# dblDefault : DOUBLE -> "double"
# 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)。