JsValueToVariant

関数

JavaScript値をVARIANT型に変換する。

DLLchakra.dll呼出規約winapi

シグネチャ

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

JsErrorCode JsValueToVariant(
    void* object,
    VARIANT* variant
);

パラメーター

名前	型	方向
object	void*	in
variant	VARIANT*	out

戻り値の型: JsErrorCode

各言語での呼び出し定義

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

JsErrorCode JsValueToVariant(
    void* object,
    VARIANT* variant
);

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

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

' object : void*
' variant : VARIANT* out
Declare PtrSafe Function JsValueToVariant Lib "chakra" ( _
    ByVal object As LongPtr, _
    ByVal variant 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

JsValueToVariant = ctypes.windll.chakra.JsValueToVariant
JsValueToVariant.restype = wintypes.DWORD
JsValueToVariant.argtypes = [
    ctypes.POINTER(None),  # object : void*
    ctypes.c_void_p,  # variant : VARIANT* out
]

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "chakra.dll"
#func global JsValueToVariant "JsValueToVariant" sptr, sptr
; JsValueToVariant object, varptr(variant)   ; 戻り値は stat
; object : void* -> "sptr"
; variant : VARIANT* 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 JsValueToVariant "JsValueToVariant" sptr, var
; res = JsValueToVariant(object, variant)
; object : void* -> "sptr"
; variant : VARIANT* 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 "chakra.dll"
#cfunc global JsValueToVariant "JsValueToVariant" sptr, sptr
; res = JsValueToVariant(object, varptr(variant))
; object : void* -> "sptr"
; variant : VARIANT* 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 JsValueToVariant(void* object, VARIANT* variant)
#uselib "chakra.dll"
#cfunc global JsValueToVariant "JsValueToVariant" intptr, var
; res = JsValueToVariant(object, variant)
; object : void* -> "intptr"
; variant : VARIANT* 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。; JsErrorCode JsValueToVariant(void* object, VARIANT* variant)
#uselib "chakra.dll"
#cfunc global JsValueToVariant "JsValueToVariant" intptr, intptr
; res = JsValueToVariant(object, varptr(variant))
; object : void* -> "intptr"
; variant : VARIANT* 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")
	procJsValueToVariant = chakra.NewProc("JsValueToVariant")
)

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

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

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

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