JsPointerToString

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

JsErrorCode JsPointerToString(
    LPCWSTR stringValue,
    UINT_PTR stringLength,
    void** value
);

<DllImport("chakra.dll", ExactSpelling:=True)>
Public Shared Function JsPointerToString(
    <MarshalAs(UnmanagedType.LPWStr)> stringValue As String,   ' LPCWSTR
    stringLength As UIntPtr,   ' UINT_PTR
    value As IntPtr   ' void** out
) As UInteger
End Function

' stringValue : LPCWSTR
' stringLength : UINT_PTR
' value : void** out
Declare PtrSafe Function JsPointerToString Lib "chakra" ( _
    ByVal stringValue As LongPtr, _
    ByVal stringLength 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

JsPointerToString = ctypes.windll.chakra.JsPointerToString
JsPointerToString.restype = wintypes.DWORD
JsPointerToString.argtypes = [
    wintypes.LPCWSTR,  # stringValue : LPCWSTR
    ctypes.c_size_t,  # stringLength : UINT_PTR
    ctypes.c_void_p,  # value : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('chakra.dll')
JsPointerToString = Fiddle::Function.new(
  lib['JsPointerToString'],
  [
    Fiddle::TYPE_VOIDP,  # stringValue : LPCWSTR
    Fiddle::TYPE_UINTPTR_T,  # stringLength : UINT_PTR
    Fiddle::TYPE_VOIDP,  # value : void** out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "chakra")]
extern "system" {
    fn JsPointerToString(
        stringValue: *const u16,  // LPCWSTR
        stringLength: usize,  // UINT_PTR
        value: *mut *mut ()  // void** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("chakra.dll")]
public static extern uint JsPointerToString([MarshalAs(UnmanagedType.LPWStr)] string stringValue, UIntPtr stringLength, IntPtr value);
"@
$api = Add-Type -MemberDefinition $sig -Name 'chakra_JsPointerToString' -Namespace Win32 -PassThru
# $api::JsPointerToString(stringValue, stringLength, value)

#uselib "chakra.dll"
#func global JsPointerToString "JsPointerToString" sptr, sptr, sptr
; JsPointerToString stringValue, stringLength, value   ; 戻り値は stat
; stringValue : LPCWSTR -> "sptr"
; stringLength : UINT_PTR -> "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。

#uselib "chakra.dll"
#cfunc global JsPointerToString "JsPointerToString" wstr, sptr, sptr
; res = JsPointerToString(stringValue, stringLength, value)
; stringValue : LPCWSTR -> "wstr"
; stringLength : UINT_PTR -> "sptr"
; value : void** out -> "sptr"

; JsErrorCode JsPointerToString(LPCWSTR stringValue, UINT_PTR stringLength, void** value)
#uselib "chakra.dll"
#cfunc global JsPointerToString "JsPointerToString" wstr, intptr, intptr
; res = JsPointerToString(stringValue, stringLength, value)
; stringValue : LPCWSTR -> "wstr"
; stringLength : UINT_PTR -> "intptr"
; value : void** out -> "intptr"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	chakra = windows.NewLazySystemDLL("chakra.dll")
	procJsPointerToString = chakra.NewProc("JsPointerToString")
)

// stringValue (LPCWSTR), stringLength (UINT_PTR), value (void** out)
r1, _, err := procJsPointerToString.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(stringValue))),
	uintptr(stringLength),
	uintptr(value),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // JsErrorCode

function JsPointerToString(
  stringValue: PWideChar;   // LPCWSTR
  stringLength: NativeUInt;   // UINT_PTR
  value: Pointer   // void** out
): DWORD; stdcall;
  external 'chakra.dll' name 'JsPointerToString';

result := DllCall("chakra\JsPointerToString"
    , "WStr", stringValue   ; LPCWSTR
    , "UPtr", stringLength   ; UINT_PTR
    , "Ptr", value   ; void** out
    , "UInt")   ; return: JsErrorCode

●JsPointerToString(stringValue, stringLength, value) = DLL("chakra.dll", "dword JsPointerToString(char*, int, void*)")
# 呼び出し: JsPointerToString(stringValue, stringLength, value)
# stringValue : LPCWSTR -> "char*"
# stringLength : UINT_PTR -> "int"
# 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)。

const std = @import("std");

extern "chakra" fn JsPointerToString(
    stringValue: [*c]const u16, // LPCWSTR
    stringLength: usize, // UINT_PTR
    value: ?*anyopaque // void** out
) callconv(std.os.windows.WINAPI) u32;

proc JsPointerToString(
    stringValue: WideCString,  # LPCWSTR
    stringLength: uint,  # UINT_PTR
    value: pointer  # void** out
): uint32 {.importc: "JsPointerToString", stdcall, dynlib: "chakra.dll".}

pragma(lib, "chakra");
extern(Windows)
uint JsPointerToString(
    const(wchar)* stringValue,   // LPCWSTR
    size_t stringLength,   // UINT_PTR
    void** value   // void** out
);

ccall((:JsPointerToString, "chakra.dll"), stdcall, UInt32,
      (Cwstring, Csize_t, Ptr{Cvoid}),
      stringValue, stringLength, value)
# stringValue : LPCWSTR -> Cwstring
# stringLength : UINT_PTR -> Csize_t
# value : void** out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t JsPointerToString(
    const uint16_t* stringValue,
    uintptr_t stringLength,
    void** value);
]]
local chakra = ffi.load("chakra")
-- chakra.JsPointerToString(stringValue, stringLength, value)
-- stringValue : LPCWSTR
-- stringLength : UINT_PTR
-- value : void** out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('chakra.dll');
const JsPointerToString = lib.func('__stdcall', 'JsPointerToString', 'uint32_t', ['str16', 'uintptr_t', 'void *']);
// JsPointerToString(stringValue, stringLength, value)
// stringValue : LPCWSTR -> 'str16'
// stringLength : UINT_PTR -> 'uintptr_t'
// value : void** out -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("chakra.dll", {
  JsPointerToString: { parameters: ["buffer", "usize", "pointer"], result: "u32" },
});
// lib.symbols.JsPointerToString(stringValue, stringLength, value)
// stringValue : LPCWSTR -> "buffer"
// stringLength : UINT_PTR -> "usize"
// value : void** out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t JsPointerToString(
    const uint16_t* stringValue,
    size_t stringLength,
    void** value);
C, "chakra.dll");
// $ffi->JsPointerToString(stringValue, stringLength, value);
// stringValue : LPCWSTR
// stringLength : UINT_PTR
// value : void** out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Chakra extends StdCallLibrary {
    Chakra INSTANCE = Native.load("chakra", Chakra.class);
    int JsPointerToString(
        WString stringValue,   // LPCWSTR
        long stringLength,   // UINT_PTR
        Pointer value   // void** out
    );
}

@[Link("chakra")]
lib Libchakra
  fun JsPointerToString = JsPointerToString(
    stringValue : UInt16*,   # LPCWSTR
    stringLength : LibC::SizeT,   # UINT_PTR
    value : Void**   # void** out
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef JsPointerToStringNative = Uint32 Function(Pointer<Utf16>, UintPtr, Pointer<Void>);
typedef JsPointerToStringDart = int Function(Pointer<Utf16>, int, Pointer<Void>);
final JsPointerToString = DynamicLibrary.open('chakra.dll')
    .lookupFunction<JsPointerToStringNative, JsPointerToStringDart>('JsPointerToString');
// stringValue : LPCWSTR -> Pointer<Utf16>
// stringLength : UINT_PTR -> UintPtr
// value : void** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function JsPointerToString(
  stringValue: PWideChar;   // LPCWSTR
  stringLength: NativeUInt;   // UINT_PTR
  value: Pointer   // void** out
): DWORD; stdcall;
  external 'chakra.dll' name 'JsPointerToString';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "JsPointerToString"
  c_JsPointerToString :: CWString -> CUIntPtr -> Ptr () -> IO Word32
-- stringValue : LPCWSTR -> CWString
-- stringLength : UINT_PTR -> CUIntPtr
-- value : void** out -> Ptr ()
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let jspointertostring =
  foreign "JsPointerToString"
    ((ptr uint16_t) @-> size_t @-> (ptr void) @-> returning uint32_t)
(* stringValue : LPCWSTR -> (ptr uint16_t) *)
(* stringLength : UINT_PTR -> size_t *)
(* value : void** out -> (ptr void) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library chakra (t "chakra.dll"))
(cffi:use-foreign-library chakra)

(cffi:defcfun ("JsPointerToString" js-pointer-to-string :convention :stdcall) :uint32
  (string-value (:string :encoding :utf-16le))   ; LPCWSTR
  (string-length :uint64)   ; UINT_PTR
  (value :pointer))   ; void** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $JsPointerToString = Win32::API::More->new('chakra',
    'DWORD JsPointerToString(LPCWSTR stringValue, WPARAM stringLength, LPVOID value)');
# my $ret = $JsPointerToString->Call($stringValue, $stringLength, $value);
# stringValue : LPCWSTR -> LPCWSTR
# stringLength : UINT_PTR -> WPARAM
# value : void** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。