JsStringToPointer

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

JsErrorCode JsStringToPointer(
    void* value,
    const WORD** stringValue,
    UINT_PTR* stringLength
);

<DllImport("chakra.dll", ExactSpelling:=True)>
Public Shared Function JsStringToPointer(
    value As IntPtr,   ' void*
    stringValue As IntPtr,   ' WORD** out
    <Out> ByRef stringLength As UIntPtr   ' UINT_PTR* out
) As UInteger
End Function

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

JsStringToPointer = ctypes.windll.chakra.JsStringToPointer
JsStringToPointer.restype = wintypes.DWORD
JsStringToPointer.argtypes = [
    ctypes.POINTER(None),  # value : void*
    ctypes.c_void_p,  # stringValue : WORD** out
    ctypes.POINTER(ctypes.c_size_t),  # stringLength : UINT_PTR* out
]

require 'fiddle'
require 'fiddle/import'

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

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

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

#uselib "chakra.dll"
#func global JsStringToPointer "JsStringToPointer" sptr, sptr, sptr
; JsStringToPointer value, varptr(stringValue), varptr(stringLength)   ; 戻り値は stat
; value : void* -> "sptr"
; stringValue : WORD** out -> "sptr"
; stringLength : UINT_PTR* 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。

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

var (
	chakra = windows.NewLazySystemDLL("chakra.dll")
	procJsStringToPointer = chakra.NewProc("JsStringToPointer")
)

// value (void*), stringValue (WORD** out), stringLength (UINT_PTR* out)
r1, _, err := procJsStringToPointer.Call(
	uintptr(value),
	uintptr(stringValue),
	uintptr(stringLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // JsErrorCode

function JsStringToPointer(
  value: Pointer;   // void*
  stringValue: Pointer;   // WORD** out
  stringLength: Pointer   // UINT_PTR* out
): DWORD; stdcall;
  external 'chakra.dll' name 'JsStringToPointer';

result := DllCall("chakra\JsStringToPointer"
    , "Ptr", value   ; void*
    , "Ptr", stringValue   ; WORD** out
    , "Ptr", stringLength   ; UINT_PTR* out
    , "UInt")   ; return: JsErrorCode

●JsStringToPointer(value, stringValue, stringLength) = DLL("chakra.dll", "dword JsStringToPointer(void*, void*, void*)")
# 呼び出し: JsStringToPointer(value, stringValue, stringLength)
# value : void* -> "void*"
# stringValue : WORD** out -> "void*"
# stringLength : UINT_PTR* 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 JsStringToPointer(
    value: ?*anyopaque, // void*
    stringValue: [*c][*c]u16, // WORD** out
    stringLength: [*c]usize // UINT_PTR* out
) callconv(std.os.windows.WINAPI) u32;

proc JsStringToPointer(
    value: pointer,  # void*
    stringValue: ptr uint16,  # WORD** out
    stringLength: ptr uint  # UINT_PTR* out
): uint32 {.importc: "JsStringToPointer", stdcall, dynlib: "chakra.dll".}

pragma(lib, "chakra");
extern(Windows)
uint JsStringToPointer(
    void* value,   // void*
    ushort** stringValue,   // WORD** out
    size_t* stringLength   // UINT_PTR* out
);

ccall((:JsStringToPointer, "chakra.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, Ptr{UInt16}, Ptr{Csize_t}),
      value, stringValue, stringLength)
# value : void* -> Ptr{Cvoid}
# stringValue : WORD** out -> Ptr{UInt16}
# stringLength : UINT_PTR* out -> Ptr{Csize_t}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t JsStringToPointer(
    void* value,
    uint16_t** stringValue,
    uintptr_t* stringLength);
]]
local chakra = ffi.load("chakra")
-- chakra.JsStringToPointer(value, stringValue, stringLength)
-- value : void*
-- stringValue : WORD** out
-- stringLength : UINT_PTR* 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 JsStringToPointer = lib.func('__stdcall', 'JsStringToPointer', 'uint32_t', ['void *', 'uint16_t *', 'uintptr_t *']);
// JsStringToPointer(value, stringValue, stringLength)
// value : void* -> 'void *'
// stringValue : WORD** out -> 'uint16_t *'
// stringLength : UINT_PTR* out -> 'uintptr_t *'
// 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", {
  JsStringToPointer: { parameters: ["pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.JsStringToPointer(value, stringValue, stringLength)
// value : void* -> "pointer"
// stringValue : WORD** out -> "pointer"
// stringLength : UINT_PTR* 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 JsStringToPointer(
    void* value,
    uint16_t** stringValue,
    size_t* stringLength);
C, "chakra.dll");
// $ffi->JsStringToPointer(value, stringValue, stringLength);
// value : void*
// stringValue : WORD** out
// stringLength : UINT_PTR* 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 JsStringToPointer(
        Pointer value,   // void*
        Pointer stringValue,   // WORD** out
        LongByReference stringLength   // UINT_PTR* out
    );
}

@[Link("chakra")]
lib Libchakra
  fun JsStringToPointer = JsStringToPointer(
    value : Void*,   # void*
    stringValue : UInt16**,   # WORD** out
    stringLength : LibC::SizeT*   # UINT_PTR* 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 JsStringToPointerNative = Uint32 Function(Pointer<Void>, Pointer<Uint16>, Pointer<UintPtr>);
typedef JsStringToPointerDart = int Function(Pointer<Void>, Pointer<Uint16>, Pointer<UintPtr>);
final JsStringToPointer = DynamicLibrary.open('chakra.dll')
    .lookupFunction<JsStringToPointerNative, JsStringToPointerDart>('JsStringToPointer');
// value : void* -> Pointer<Void>
// stringValue : WORD** out -> Pointer<Uint16>
// stringLength : UINT_PTR* out -> Pointer<UintPtr>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

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

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

foreign import stdcall safe "JsStringToPointer"
  c_JsStringToPointer :: Ptr () -> Ptr Word16 -> Ptr CUIntPtr -> IO Word32
-- value : void* -> Ptr ()
-- stringValue : WORD** out -> Ptr Word16
-- stringLength : UINT_PTR* out -> Ptr CUIntPtr
-- 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 jsstringtopointer =
  foreign "JsStringToPointer"
    ((ptr void) @-> (ptr uint16_t) @-> (ptr size_t) @-> returning uint32_t)
(* value : void* -> (ptr void) *)
(* stringValue : WORD** out -> (ptr uint16_t) *)
(* stringLength : UINT_PTR* out -> (ptr size_t) *)
(* 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 ("JsStringToPointer" js-string-to-pointer :convention :stdcall) :uint32
  (value :pointer)   ; void*
  (string-value :pointer)   ; WORD** out
  (string-length :pointer))   ; UINT_PTR* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

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