JsVariantToValue

関数

VARIANT型をJavaScript値に変換する。

DLLchakra.dll呼出規約winapi

シグネチャ

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

JsErrorCode JsVariantToValue(
    VARIANT* variant,
    void** value
);

パラメーター

名前	型	方向
variant	VARIANT*	in
value	void**	out

戻り値の型: JsErrorCode

各言語での呼び出し定義

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

JsErrorCode JsVariantToValue(
    VARIANT* variant,
    void** value
);

[DllImport("chakra.dll", ExactSpelling = true)]
static extern uint JsVariantToValue(
    IntPtr variant,   // VARIANT*
    IntPtr value   // void** out
);

<DllImport("chakra.dll", ExactSpelling:=True)>
Public Shared Function JsVariantToValue(
    [variant] As IntPtr,   ' VARIANT*
    value As IntPtr   ' void** out
) As UInteger
End Function

' variant : VARIANT*
' value : void** out
Declare PtrSafe Function JsVariantToValue Lib "chakra" ( _
    ByVal variant As LongPtr, _
    ByVal value As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

JsVariantToValue = ctypes.windll.chakra.JsVariantToValue
JsVariantToValue.restype = wintypes.DWORD
JsVariantToValue.argtypes = [
    ctypes.c_void_p,  # variant : VARIANT*
    ctypes.c_void_p,  # value : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('chakra.dll')
JsVariantToValue = Fiddle::Function.new(
  lib['JsVariantToValue'],
  [
    Fiddle::TYPE_VOIDP,  # variant : VARIANT*
    Fiddle::TYPE_VOIDP,  # value : void** out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "chakra")]
extern "system" {
    fn JsVariantToValue(
        variant: *mut VARIANT,  // VARIANT*
        value: *mut *mut ()  // void** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("chakra.dll")]
public static extern uint JsVariantToValue(IntPtr variant, IntPtr value);
"@
$api = Add-Type -MemberDefinition $sig -Name 'chakra_JsVariantToValue' -Namespace Win32 -PassThru
# $api::JsVariantToValue(variant, value)

#uselib "chakra.dll"
#func global JsVariantToValue "JsVariantToValue" sptr, sptr
; JsVariantToValue varptr(variant), value   ; 戻り値は stat
; variant : VARIANT* -> "sptr"
; value : void** 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 "chakra.dll"
#cfunc global JsVariantToValue "JsVariantToValue" var, sptr
; res = JsVariantToValue(variant, value)
; variant : VARIANT* -> "var"
; value : void** out -> "sptr"
; ※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 "chakra.dll"
#cfunc global JsVariantToValue "JsVariantToValue" sptr, sptr
; res = JsVariantToValue(varptr(variant), value)
; variant : VARIANT* -> "sptr"
; value : void** 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:

; JsErrorCode JsVariantToValue(VARIANT* variant, void** value)
#uselib "chakra.dll"
#cfunc global JsVariantToValue "JsVariantToValue" var, intptr
; res = JsVariantToValue(variant, value)
; variant : VARIANT* -> "var"
; value : void** out -> "intptr"
; ※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。; JsErrorCode JsVariantToValue(VARIANT* variant, void** value)
#uselib "chakra.dll"
#cfunc global JsVariantToValue "JsVariantToValue" intptr, intptr
; res = JsVariantToValue(varptr(variant), value)
; variant : VARIANT* -> "intptr"
; value : void** 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 (
	chakra = windows.NewLazySystemDLL("chakra.dll")
	procJsVariantToValue = chakra.NewProc("JsVariantToValue")
)

// variant (VARIANT*), value (void** out)
r1, _, err := procJsVariantToValue.Call(
	uintptr(variant),
	uintptr(value),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // JsErrorCode

function JsVariantToValue(
  variant: Pointer;   // VARIANT*
  value: Pointer   // void** out
): DWORD; stdcall;
  external 'chakra.dll' name 'JsVariantToValue';

result := DllCall("chakra\JsVariantToValue"
    , "Ptr", variant   ; VARIANT*
    , "Ptr", value   ; void** out
    , "UInt")   ; return: JsErrorCode

●JsVariantToValue(variant, value) = DLL("chakra.dll", "dword JsVariantToValue(void*, void*)")
# 呼び出し: JsVariantToValue(variant, value)
# variant : VARIANT* -> "void*"
# value : void** 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)。