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PropVariantToDoubleVectorAlloc

関数

PROPVARIANTから倍精度浮動小数点数の配列を取り出し、新しく確保したバッファに格納する。

DLLPROPSYS.dll呼出規約winapi対応OSWindows XP 以降

シグネチャ

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

HRESULT PropVariantToDoubleVectorAlloc(
    const PROPVARIANT* propvar,
    DOUBLE** pprgn,
    DWORD* pcElem
);

パラメーター

名前	型	方向
propvar	PROPVARIANT*	in
pprgn	DOUBLE**	out
pcElem	DWORD*	out

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT PropVariantToDoubleVectorAlloc(
    const PROPVARIANT* propvar,
    DOUBLE** pprgn,
    DWORD* pcElem
);

[DllImport("PROPSYS.dll", ExactSpelling = true)]
static extern int PropVariantToDoubleVectorAlloc(
    IntPtr propvar,   // PROPVARIANT*
    IntPtr pprgn,   // DOUBLE** out
    out uint pcElem   // DWORD* out
);

<DllImport("PROPSYS.dll", ExactSpelling:=True)>
Public Shared Function PropVariantToDoubleVectorAlloc(
    propvar As IntPtr,   ' PROPVARIANT*
    pprgn As IntPtr,   ' DOUBLE** out
    <Out> ByRef pcElem As UInteger   ' DWORD* out
) As Integer
End Function

' propvar : PROPVARIANT*
' pprgn : DOUBLE** out
' pcElem : DWORD* out
Declare PtrSafe Function PropVariantToDoubleVectorAlloc Lib "propsys" ( _
    ByVal propvar As LongPtr, _
    ByVal pprgn As LongPtr, _
    ByRef pcElem As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PropVariantToDoubleVectorAlloc = ctypes.windll.propsys.PropVariantToDoubleVectorAlloc
PropVariantToDoubleVectorAlloc.restype = ctypes.c_int
PropVariantToDoubleVectorAlloc.argtypes = [
    ctypes.c_void_p,  # propvar : PROPVARIANT*
    ctypes.c_void_p,  # pprgn : DOUBLE** out
    ctypes.POINTER(wintypes.DWORD),  # pcElem : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('PROPSYS.dll')
PropVariantToDoubleVectorAlloc = Fiddle::Function.new(
  lib['PropVariantToDoubleVectorAlloc'],
  [
    Fiddle::TYPE_VOIDP,  # propvar : PROPVARIANT*
    Fiddle::TYPE_VOIDP,  # pprgn : DOUBLE** out
    Fiddle::TYPE_VOIDP,  # pcElem : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "propsys")]
extern "system" {
    fn PropVariantToDoubleVectorAlloc(
        propvar: *const PROPVARIANT,  // PROPVARIANT*
        pprgn: *mut *mut f64,  // DOUBLE** out
        pcElem: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("PROPSYS.dll")]
public static extern int PropVariantToDoubleVectorAlloc(IntPtr propvar, IntPtr pprgn, out uint pcElem);
"@
$api = Add-Type -MemberDefinition $sig -Name 'PROPSYS_PropVariantToDoubleVectorAlloc' -Namespace Win32 -PassThru
# $api::PropVariantToDoubleVectorAlloc(propvar, pprgn, pcElem)

#uselib "PROPSYS.dll"
#func global PropVariantToDoubleVectorAlloc "PropVariantToDoubleVectorAlloc" sptr, sptr, sptr
; PropVariantToDoubleVectorAlloc varptr(propvar), varptr(pprgn), varptr(pcElem)   ; 戻り値は stat
; propvar : PROPVARIANT* -> "sptr"
; pprgn : DOUBLE** out -> "sptr"
; pcElem : DWORD* 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 "PROPSYS.dll"
#cfunc global PropVariantToDoubleVectorAlloc "PropVariantToDoubleVectorAlloc" var, var, var
; res = PropVariantToDoubleVectorAlloc(propvar, pprgn, pcElem)
; propvar : PROPVARIANT* -> "var"
; pprgn : DOUBLE** out -> "var"
; pcElem : DWORD* 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 "PROPSYS.dll"
#cfunc global PropVariantToDoubleVectorAlloc "PropVariantToDoubleVectorAlloc" sptr, sptr, sptr
; res = PropVariantToDoubleVectorAlloc(varptr(propvar), varptr(pprgn), varptr(pcElem))
; propvar : PROPVARIANT* -> "sptr"
; pprgn : DOUBLE** out -> "sptr"
; pcElem : DWORD* 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 PropVariantToDoubleVectorAlloc(PROPVARIANT* propvar, DOUBLE** pprgn, DWORD* pcElem)
#uselib "PROPSYS.dll"
#cfunc global PropVariantToDoubleVectorAlloc "PropVariantToDoubleVectorAlloc" var, var, var
; res = PropVariantToDoubleVectorAlloc(propvar, pprgn, pcElem)
; propvar : PROPVARIANT* -> "var"
; pprgn : DOUBLE** out -> "var"
; pcElem : DWORD* 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 PropVariantToDoubleVectorAlloc(PROPVARIANT* propvar, DOUBLE** pprgn, DWORD* pcElem)
#uselib "PROPSYS.dll"
#cfunc global PropVariantToDoubleVectorAlloc "PropVariantToDoubleVectorAlloc" intptr, intptr, intptr
; res = PropVariantToDoubleVectorAlloc(varptr(propvar), varptr(pprgn), varptr(pcElem))
; propvar : PROPVARIANT* -> "intptr"
; pprgn : DOUBLE** out -> "intptr"
; pcElem : DWORD* 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 (
	propsys = windows.NewLazySystemDLL("PROPSYS.dll")
	procPropVariantToDoubleVectorAlloc = propsys.NewProc("PropVariantToDoubleVectorAlloc")
)

// propvar (PROPVARIANT*), pprgn (DOUBLE** out), pcElem (DWORD* out)
r1, _, err := procPropVariantToDoubleVectorAlloc.Call(
	uintptr(propvar),
	uintptr(pprgn),
	uintptr(pcElem),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function PropVariantToDoubleVectorAlloc(
  propvar: Pointer;   // PROPVARIANT*
  pprgn: Pointer;   // DOUBLE** out
  pcElem: Pointer   // DWORD* out
): Integer; stdcall;
  external 'PROPSYS.dll' name 'PropVariantToDoubleVectorAlloc';

result := DllCall("PROPSYS\PropVariantToDoubleVectorAlloc"
    , "Ptr", propvar   ; PROPVARIANT*
    , "Ptr", pprgn   ; DOUBLE** out
    , "Ptr", pcElem   ; DWORD* out
    , "Int")   ; return: HRESULT

●PropVariantToDoubleVectorAlloc(propvar, pprgn, pcElem) = DLL("PROPSYS.dll", "int PropVariantToDoubleVectorAlloc(void*, void*, void*)")
# 呼び出し: PropVariantToDoubleVectorAlloc(propvar, pprgn, pcElem)
# propvar : PROPVARIANT* -> "void*"
# pprgn : DOUBLE** out -> "void*"
# pcElem : DWORD* 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)。