// SHLWAPI.dll  (Unicode / -W)
#include <windows.h>

HRESULT UrlUnescapeW(
    LPWSTR pszUrl,
    LPWSTR pszUnescaped,   // optional
    DWORD* pcchUnescaped,   // optional
    DWORD dwFlags
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function UrlUnescapeW(
    <MarshalAs(UnmanagedType.LPWStr)> pszUrl As System.Text.StringBuilder,   ' LPWSTR in/out
    <MarshalAs(UnmanagedType.LPWStr)> pszUnescaped As System.Text.StringBuilder,   ' LPWSTR optional, out
    pcchUnescaped As IntPtr,   ' DWORD* optional, in/out
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' pszUrl : LPWSTR in/out
' pszUnescaped : LPWSTR optional, out
' pcchUnescaped : DWORD* optional, in/out
' dwFlags : DWORD
Declare PtrSafe Function UrlUnescapeW Lib "shlwapi" ( _
    ByVal pszUrl As LongPtr, _
    ByVal pszUnescaped As LongPtr, _
    ByVal pcchUnescaped As LongPtr, _
    ByVal dwFlags As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

UrlUnescapeW = ctypes.windll.shlwapi.UrlUnescapeW
UrlUnescapeW.restype = ctypes.c_int
UrlUnescapeW.argtypes = [
    wintypes.LPWSTR,  # pszUrl : LPWSTR in/out
    wintypes.LPWSTR,  # pszUnescaped : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchUnescaped : DWORD* optional, in/out
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
UrlUnescapeW = Fiddle::Function.new(
  lib['UrlUnescapeW'],
  [
    Fiddle::TYPE_VOIDP,  # pszUrl : LPWSTR in/out
    Fiddle::TYPE_VOIDP,  # pszUnescaped : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchUnescaped : DWORD* optional, in/out
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn UrlUnescapeW(
        pszUrl: *mut u16,  // LPWSTR in/out
        pszUnescaped: *mut u16,  // LPWSTR optional, out
        pcchUnescaped: *mut u32,  // DWORD* optional, in/out
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern int UrlUnescapeW([MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszUrl, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszUnescaped, IntPtr pcchUnescaped, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_UrlUnescapeW' -Namespace Win32 -PassThru
# $api::UrlUnescapeW(pszUrl, pszUnescaped, pcchUnescaped, dwFlags)

#uselib "SHLWAPI.dll"
#func global UrlUnescapeW "UrlUnescapeW" wptr, wptr, wptr, wptr
; UrlUnescapeW varptr(pszUrl), varptr(pszUnescaped), varptr(pcchUnescaped), dwFlags   ; 戻り値は stat
; pszUrl : LPWSTR in/out -> "wptr"
; pszUnescaped : LPWSTR optional, out -> "wptr"
; pcchUnescaped : DWORD* optional, in/out -> "wptr"
; dwFlags : DWORD -> "wptr"
; ※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 (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procUrlUnescapeW = shlwapi.NewProc("UrlUnescapeW")
)

// pszUrl (LPWSTR in/out), pszUnescaped (LPWSTR optional, out), pcchUnescaped (DWORD* optional, in/out), dwFlags (DWORD)
r1, _, err := procUrlUnescapeW.Call(
	uintptr(pszUrl),
	uintptr(pszUnescaped),
	uintptr(pcchUnescaped),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function UrlUnescapeW(
  pszUrl: PWideChar;   // LPWSTR in/out
  pszUnescaped: PWideChar;   // LPWSTR optional, out
  pcchUnescaped: Pointer;   // DWORD* optional, in/out
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'UrlUnescapeW';

result := DllCall("SHLWAPI\UrlUnescapeW"
    , "Ptr", pszUrl   ; LPWSTR in/out
    , "Ptr", pszUnescaped   ; LPWSTR optional, out
    , "Ptr", pcchUnescaped   ; DWORD* optional, in/out
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●UrlUnescapeW(pszUrl, pszUnescaped, pcchUnescaped, dwFlags) = DLL("SHLWAPI.dll", "int UrlUnescapeW(char*, char*, void*, dword)")
# 呼び出し: UrlUnescapeW(pszUrl, pszUnescaped, pcchUnescaped, dwFlags)
# pszUrl : LPWSTR in/out -> "char*"
# pszUnescaped : LPWSTR optional, out -> "char*"
# pcchUnescaped : DWORD* optional, in/out -> "void*"
# dwFlags : DWORD -> "dword"
# 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。

const std = @import("std");

extern "shlwapi" fn UrlUnescapeW(
    pszUrl: [*c]u16, // LPWSTR in/out
    pszUnescaped: [*c]u16, // LPWSTR optional, out
    pcchUnescaped: [*c]u32, // DWORD* optional, in/out
    dwFlags: u32 // DWORD
) callconv(std.os.windows.WINAPI) i32;
// Unicode(-W): UTF-16LE のヌル終端バッファ([*c]const u16)を渡す。

proc UrlUnescapeW(
    pszUrl: ptr uint16,  # LPWSTR in/out
    pszUnescaped: ptr uint16,  # LPWSTR optional, out
    pcchUnescaped: ptr uint32,  # DWORD* optional, in/out
    dwFlags: uint32  # DWORD
): int32 {.importc: "UrlUnescapeW", stdcall, dynlib: "SHLWAPI.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "shlwapi");
extern(Windows)
int UrlUnescapeW(
    wchar* pszUrl,   // LPWSTR in/out
    wchar* pszUnescaped,   // LPWSTR optional, out
    uint* pcchUnescaped,   // DWORD* optional, in/out
    uint dwFlags   // DWORD
);

ccall((:UrlUnescapeW, "SHLWAPI.dll"), stdcall, Int32,
      (Ptr{UInt16}, Ptr{UInt16}, Ptr{UInt32}, UInt32),
      pszUrl, pszUnescaped, pcchUnescaped, dwFlags)
# pszUrl : LPWSTR in/out -> Ptr{UInt16}
# pszUnescaped : LPWSTR optional, out -> Ptr{UInt16}
# pcchUnescaped : DWORD* optional, in/out -> Ptr{UInt32}
# dwFlags : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
# Unicode(-W): Cwstring には transcode(UInt16, "...") 等で UTF-16 を渡す。

local ffi = require("ffi")
ffi.cdef[[
int32_t UrlUnescapeW(
    uint16_t* pszUrl,
    uint16_t* pszUnescaped,
    uint32_t* pcchUnescaped,
    uint32_t dwFlags);
]]
local shlwapi = ffi.load("shlwapi")
-- shlwapi.UrlUnescapeW(pszUrl, pszUnescaped, pcchUnescaped, dwFlags)
-- pszUrl : LPWSTR in/out
-- pszUnescaped : LPWSTR optional, out
-- pcchUnescaped : DWORD* optional, in/out
-- dwFlags : DWORD
-- 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。
-- Unicode(-W): uint16_t* には UTF-16LE のバッファ(ffi.new("uint16_t[?]", ...))を渡す。

const koffi = require('koffi');
const lib = koffi.load('SHLWAPI.dll');
const UrlUnescapeW = lib.func('__stdcall', 'UrlUnescapeW', 'int32_t', ['uint16_t *', 'uint16_t *', 'uint32_t *', 'uint32_t']);
// UrlUnescapeW(pszUrl, pszUnescaped, pcchUnescaped, dwFlags)
// pszUrl : LPWSTR in/out -> 'uint16_t *'
// pszUnescaped : LPWSTR optional, out -> 'uint16_t *'
// pcchUnescaped : DWORD* optional, in/out -> 'uint32_t *'
// dwFlags : DWORD -> 'uint32_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("SHLWAPI.dll", {
  UrlUnescapeW: { parameters: ["buffer", "buffer", "pointer", "u32"], result: "i32" },
});
// lib.symbols.UrlUnescapeW(pszUrl, pszUnescaped, pcchUnescaped, dwFlags)
// pszUrl : LPWSTR in/out -> "buffer"
// pszUnescaped : LPWSTR optional, out -> "buffer"
// pcchUnescaped : DWORD* optional, in/out -> "pointer"
// dwFlags : DWORD -> "u32"
// 文字列は "buffer"。Unicode(-W) は new TextEncoder() ではなく UTF-16LE のバイト列(末尾に \x00\x00)を Uint8Array で渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t UrlUnescapeW(
    uint16_t* pszUrl,
    uint16_t* pszUnescaped,
    uint32_t* pcchUnescaped,
    uint32_t dwFlags);
C, "SHLWAPI.dll");
// $ffi->UrlUnescapeW(pszUrl, pszUnescaped, pcchUnescaped, dwFlags);
// pszUrl : LPWSTR in/out
// pszUnescaped : LPWSTR optional, out
// pcchUnescaped : DWORD* optional, in/out
// dwFlags : DWORD
// 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 Shlwapi extends StdCallLibrary {
    Shlwapi INSTANCE = Native.load("shlwapi", Shlwapi.class, W32APIOptions.UNICODE_OPTIONS);
    int UrlUnescapeW(
        char[] pszUrl,   // LPWSTR in/out
        char[] pszUnescaped,   // LPWSTR optional, out
        IntByReference pcchUnescaped,   // DWORD* optional, in/out
        int dwFlags   // DWORD
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("shlwapi")]
lib LibSHLWAPI
  fun UrlUnescapeW = UrlUnescapeW(
    pszUrl : UInt16*,   # LPWSTR in/out
    pszUnescaped : UInt16*,   # LPWSTR optional, out
    pcchUnescaped : UInt32*,   # DWORD* optional, in/out
    dwFlags : UInt32   # DWORD
  ) : Int32
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 UrlUnescapeWNative = Int32 Function(Pointer<Utf16>, Pointer<Utf16>, Pointer<Uint32>, Uint32);
typedef UrlUnescapeWDart = int Function(Pointer<Utf16>, Pointer<Utf16>, Pointer<Uint32>, int);
final UrlUnescapeW = DynamicLibrary.open('SHLWAPI.dll')
    .lookupFunction<UrlUnescapeWNative, UrlUnescapeWDart>('UrlUnescapeW');
// pszUrl : LPWSTR in/out -> Pointer<Utf16>
// pszUnescaped : LPWSTR optional, out -> Pointer<Utf16>
// pcchUnescaped : DWORD* optional, in/out -> Pointer<Uint32>
// dwFlags : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function UrlUnescapeW(
  pszUrl: PWideChar;   // LPWSTR in/out
  pszUnescaped: PWideChar;   // LPWSTR optional, out
  pcchUnescaped: Pointer;   // DWORD* optional, in/out
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'UrlUnescapeW';

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

foreign import stdcall safe "UrlUnescapeW"
  c_UrlUnescapeW :: CWString -> CWString -> Ptr Word32 -> Word32 -> IO Int32
-- pszUrl : LPWSTR in/out -> CWString
-- pszUnescaped : LPWSTR optional, out -> CWString
-- pcchUnescaped : DWORD* optional, in/out -> Ptr Word32
-- dwFlags : DWORD -> Word32
-- 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 urlunescapew =
  foreign "UrlUnescapeW"
    ((ptr uint16_t) @-> (ptr uint16_t) @-> (ptr uint32_t) @-> uint32_t @-> returning int32_t)
(* pszUrl : LPWSTR in/out -> (ptr uint16_t) *)
(* pszUnescaped : LPWSTR optional, out -> (ptr uint16_t) *)
(* pcchUnescaped : DWORD* optional, in/out -> (ptr uint32_t) *)
(* dwFlags : DWORD -> uint32_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 shlwapi (t "SHLWAPI.dll"))
(cffi:use-foreign-library shlwapi)

(cffi:defcfun ("UrlUnescapeW" url-unescape-w :convention :stdcall) :int32
  (psz-url :pointer)   ; LPWSTR in/out
  (psz-unescaped :pointer)   ; LPWSTR optional, out
  (pcch-unescaped :pointer)   ; DWORD* optional, in/out
  (dw-flags :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $UrlUnescapeW = Win32::API::More->new('SHLWAPI',
    'int UrlUnescapeW(LPWSTR pszUrl, LPWSTR pszUnescaped, LPVOID pcchUnescaped, DWORD dwFlags)');
# my $ret = $UrlUnescapeW->Call($pszUrl, $pszUnescaped, $pcchUnescaped, $dwFlags);
# pszUrl : LPWSTR in/out -> LPWSTR
# pszUnescaped : LPWSTR optional, out -> LPWSTR
# pcchUnescaped : DWORD* optional, in/out -> LPVOID
# dwFlags : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# Unicode(-W): LPCWSTR/LPWSTR は Win32::API が UTF-16 変換を行う。