GetCurrentPackageInfo

// KERNEL32.dll
#include <windows.h>

WIN32_ERROR GetCurrentPackageInfo(
    DWORD flags,
    DWORD* bufferLength,
    BYTE* buffer,   // optional
    DWORD* count   // optional
);

<DllImport("KERNEL32.dll", ExactSpelling:=True)>
Public Shared Function GetCurrentPackageInfo(
    flags As UInteger,   ' DWORD
    ByRef bufferLength As UInteger,   ' DWORD* in/out
    buffer As IntPtr,   ' BYTE* optional, out
    count As IntPtr   ' DWORD* optional, out
) As UInteger
End Function

' flags : DWORD
' bufferLength : DWORD* in/out
' buffer : BYTE* optional, out
' count : DWORD* optional, out
Declare PtrSafe Function GetCurrentPackageInfo Lib "kernel32" ( _
    ByVal flags As Long, _
    ByRef bufferLength As Long, _
    ByVal buffer As LongPtr, _
    ByVal count 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

GetCurrentPackageInfo = ctypes.windll.kernel32.GetCurrentPackageInfo
GetCurrentPackageInfo.restype = wintypes.DWORD
GetCurrentPackageInfo.argtypes = [
    wintypes.DWORD,  # flags : DWORD
    ctypes.POINTER(wintypes.DWORD),  # bufferLength : DWORD* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # buffer : BYTE* optional, out
    ctypes.POINTER(wintypes.DWORD),  # count : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetCurrentPackageInfo = Fiddle::Function.new(
  lib['GetCurrentPackageInfo'],
  [
    -Fiddle::TYPE_INT,  # flags : DWORD
    Fiddle::TYPE_VOIDP,  # bufferLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # buffer : BYTE* optional, out
    Fiddle::TYPE_VOIDP,  # count : DWORD* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetCurrentPackageInfo(
        flags: u32,  // DWORD
        bufferLength: *mut u32,  // DWORD* in/out
        buffer: *mut u8,  // BYTE* optional, out
        count: *mut u32  // DWORD* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll")]
public static extern uint GetCurrentPackageInfo(uint flags, ref uint bufferLength, IntPtr buffer, IntPtr count);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetCurrentPackageInfo' -Namespace Win32 -PassThru
# $api::GetCurrentPackageInfo(flags, bufferLength, buffer, count)

#uselib "KERNEL32.dll"
#func global GetCurrentPackageInfo "GetCurrentPackageInfo" sptr, sptr, sptr, sptr
; GetCurrentPackageInfo flags, varptr(bufferLength), varptr(buffer), varptr(count)   ; 戻り値は stat
; flags : DWORD -> "sptr"
; bufferLength : DWORD* in/out -> "sptr"
; buffer : BYTE* optional, out -> "sptr"
; count : DWORD* optional, 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 (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetCurrentPackageInfo = kernel32.NewProc("GetCurrentPackageInfo")
)

// flags (DWORD), bufferLength (DWORD* in/out), buffer (BYTE* optional, out), count (DWORD* optional, out)
r1, _, err := procGetCurrentPackageInfo.Call(
	uintptr(flags),
	uintptr(bufferLength),
	uintptr(buffer),
	uintptr(count),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function GetCurrentPackageInfo(
  flags: DWORD;   // DWORD
  bufferLength: Pointer;   // DWORD* in/out
  buffer: Pointer;   // BYTE* optional, out
  count: Pointer   // DWORD* optional, out
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'GetCurrentPackageInfo';

result := DllCall("KERNEL32\GetCurrentPackageInfo"
    , "UInt", flags   ; DWORD
    , "Ptr", bufferLength   ; DWORD* in/out
    , "Ptr", buffer   ; BYTE* optional, out
    , "Ptr", count   ; DWORD* optional, out
    , "UInt")   ; return: WIN32_ERROR

●GetCurrentPackageInfo(flags, bufferLength, buffer, count) = DLL("KERNEL32.dll", "dword GetCurrentPackageInfo(dword, void*, void*, void*)")
# 呼び出し: GetCurrentPackageInfo(flags, bufferLength, buffer, count)
# flags : DWORD -> "dword"
# bufferLength : DWORD* in/out -> "void*"
# buffer : BYTE* optional, out -> "void*"
# count : DWORD* optional, 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 "kernel32" fn GetCurrentPackageInfo(
    flags: u32, // DWORD
    bufferLength: [*c]u32, // DWORD* in/out
    buffer: [*c]u8, // BYTE* optional, out
    count: [*c]u32 // DWORD* optional, out
) callconv(std.os.windows.WINAPI) u32;

proc GetCurrentPackageInfo(
    flags: uint32,  # DWORD
    bufferLength: ptr uint32,  # DWORD* in/out
    buffer: ptr uint8,  # BYTE* optional, out
    count: ptr uint32  # DWORD* optional, out
): uint32 {.importc: "GetCurrentPackageInfo", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
uint GetCurrentPackageInfo(
    uint flags,   // DWORD
    uint* bufferLength,   // DWORD* in/out
    ubyte* buffer,   // BYTE* optional, out
    uint* count   // DWORD* optional, out
);

ccall((:GetCurrentPackageInfo, "KERNEL32.dll"), stdcall, UInt32,
      (UInt32, Ptr{UInt32}, Ptr{UInt8}, Ptr{UInt32}),
      flags, bufferLength, buffer, count)
# flags : DWORD -> UInt32
# bufferLength : DWORD* in/out -> Ptr{UInt32}
# buffer : BYTE* optional, out -> Ptr{UInt8}
# count : DWORD* optional, out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t GetCurrentPackageInfo(
    uint32_t flags,
    uint32_t* bufferLength,
    uint8_t* buffer,
    uint32_t* count);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.GetCurrentPackageInfo(flags, bufferLength, buffer, count)
-- flags : DWORD
-- bufferLength : DWORD* in/out
-- buffer : BYTE* optional, out
-- count : DWORD* optional, 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('KERNEL32.dll');
const GetCurrentPackageInfo = lib.func('__stdcall', 'GetCurrentPackageInfo', 'uint32_t', ['uint32_t', 'uint32_t *', 'uint8_t *', 'uint32_t *']);
// GetCurrentPackageInfo(flags, bufferLength, buffer, count)
// flags : DWORD -> 'uint32_t'
// bufferLength : DWORD* in/out -> 'uint32_t *'
// buffer : BYTE* optional, out -> 'uint8_t *'
// count : DWORD* optional, out -> '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("KERNEL32.dll", {
  GetCurrentPackageInfo: { parameters: ["u32", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.GetCurrentPackageInfo(flags, bufferLength, buffer, count)
// flags : DWORD -> "u32"
// bufferLength : DWORD* in/out -> "pointer"
// buffer : BYTE* optional, out -> "pointer"
// count : DWORD* optional, 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 GetCurrentPackageInfo(
    uint32_t flags,
    uint32_t* bufferLength,
    uint8_t* buffer,
    uint32_t* count);
C, "KERNEL32.dll");
// $ffi->GetCurrentPackageInfo(flags, bufferLength, buffer, count);
// flags : DWORD
// bufferLength : DWORD* in/out
// buffer : BYTE* optional, out
// count : DWORD* optional, 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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    int GetCurrentPackageInfo(
        int flags,   // DWORD
        IntByReference bufferLength,   // DWORD* in/out
        byte[] buffer,   // BYTE* optional, out
        IntByReference count   // DWORD* optional, out
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun GetCurrentPackageInfo = GetCurrentPackageInfo(
    flags : UInt32,   # DWORD
    bufferLength : UInt32*,   # DWORD* in/out
    buffer : UInt8*,   # BYTE* optional, out
    count : UInt32*   # DWORD* optional, 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 GetCurrentPackageInfoNative = Uint32 Function(Uint32, Pointer<Uint32>, Pointer<Uint8>, Pointer<Uint32>);
typedef GetCurrentPackageInfoDart = int Function(int, Pointer<Uint32>, Pointer<Uint8>, Pointer<Uint32>);
final GetCurrentPackageInfo = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<GetCurrentPackageInfoNative, GetCurrentPackageInfoDart>('GetCurrentPackageInfo');
// flags : DWORD -> Uint32
// bufferLength : DWORD* in/out -> Pointer<Uint32>
// buffer : BYTE* optional, out -> Pointer<Uint8>
// count : DWORD* optional, out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetCurrentPackageInfo(
  flags: DWORD;   // DWORD
  bufferLength: Pointer;   // DWORD* in/out
  buffer: Pointer;   // BYTE* optional, out
  count: Pointer   // DWORD* optional, out
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'GetCurrentPackageInfo';

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

foreign import stdcall safe "GetCurrentPackageInfo"
  c_GetCurrentPackageInfo :: Word32 -> Ptr Word32 -> Ptr Word8 -> Ptr Word32 -> IO Word32
-- flags : DWORD -> Word32
-- bufferLength : DWORD* in/out -> Ptr Word32
-- buffer : BYTE* optional, out -> Ptr Word8
-- count : DWORD* optional, out -> Ptr 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 getcurrentpackageinfo =
  foreign "GetCurrentPackageInfo"
    (uint32_t @-> (ptr uint32_t) @-> (ptr uint8_t) @-> (ptr uint32_t) @-> returning uint32_t)
(* flags : DWORD -> uint32_t *)
(* bufferLength : DWORD* in/out -> (ptr uint32_t) *)
(* buffer : BYTE* optional, out -> (ptr uint8_t) *)
(* count : DWORD* optional, out -> (ptr 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 kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("GetCurrentPackageInfo" get-current-package-info :convention :stdcall) :uint32
  (flags :uint32)   ; DWORD
  (buffer-length :pointer)   ; DWORD* in/out
  (buffer :pointer)   ; BYTE* optional, out
  (count :pointer))   ; DWORD* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetCurrentPackageInfo = Win32::API::More->new('KERNEL32',
    'DWORD GetCurrentPackageInfo(DWORD flags, LPVOID bufferLength, LPVOID buffer, LPVOID count)');
# my $ret = $GetCurrentPackageInfo->Call($flags, $bufferLength, $buffer, $count);
# flags : DWORD -> DWORD
# bufferLength : DWORD* in/out -> LPVOID
# buffer : BYTE* optional, out -> LPVOID
# count : DWORD* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。