CreateDeltaW

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

BOOL CreateDeltaW(
    LONGLONG FileTypeSet,
    LONGLONG SetFlags,
    LONGLONG ResetFlags,
    LPCWSTR lpSourceName,
    LPCWSTR lpTargetName,
    LPCWSTR lpSourceOptionsName,   // optional
    LPCWSTR lpTargetOptionsName,   // optional
    DELTA_INPUT GlobalOptions,
    const FILETIME* lpTargetFileTime,   // optional
    ALG_ID HashAlgId,
    LPCWSTR lpDeltaName
);

<DllImport("msdelta.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function CreateDeltaW(
    FileTypeSet As Long,   ' LONGLONG
    SetFlags As Long,   ' LONGLONG
    ResetFlags As Long,   ' LONGLONG
    <MarshalAs(UnmanagedType.LPWStr)> lpSourceName As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpTargetName As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpSourceOptionsName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpTargetOptionsName As String,   ' LPCWSTR optional
    GlobalOptions As DELTA_INPUT,   ' DELTA_INPUT
    lpTargetFileTime As IntPtr,   ' FILETIME* optional
    HashAlgId As UInteger,   ' ALG_ID
    <MarshalAs(UnmanagedType.LPWStr)> lpDeltaName As String   ' LPCWSTR
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' FileTypeSet : LONGLONG
' SetFlags : LONGLONG
' ResetFlags : LONGLONG
' lpSourceName : LPCWSTR
' lpTargetName : LPCWSTR
' lpSourceOptionsName : LPCWSTR optional
' lpTargetOptionsName : LPCWSTR optional
' GlobalOptions : DELTA_INPUT
' lpTargetFileTime : FILETIME* optional
' HashAlgId : ALG_ID
' lpDeltaName : LPCWSTR
Declare PtrSafe Function CreateDeltaW Lib "msdelta" ( _
    ByVal FileTypeSet As LongLong, _
    ByVal SetFlags As LongLong, _
    ByVal ResetFlags As LongLong, _
    ByVal lpSourceName As LongPtr, _
    ByVal lpTargetName As LongPtr, _
    ByVal lpSourceOptionsName As LongPtr, _
    ByVal lpTargetOptionsName As LongPtr, _
    ByVal GlobalOptions As LongPtr, _
    ByVal lpTargetFileTime As LongPtr, _
    ByVal HashAlgId As Long, _
    ByVal lpDeltaName As LongPtr) 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

CreateDeltaW = ctypes.windll.msdelta.CreateDeltaW
CreateDeltaW.restype = wintypes.BOOL
CreateDeltaW.argtypes = [
    ctypes.c_longlong,  # FileTypeSet : LONGLONG
    ctypes.c_longlong,  # SetFlags : LONGLONG
    ctypes.c_longlong,  # ResetFlags : LONGLONG
    wintypes.LPCWSTR,  # lpSourceName : LPCWSTR
    wintypes.LPCWSTR,  # lpTargetName : LPCWSTR
    wintypes.LPCWSTR,  # lpSourceOptionsName : LPCWSTR optional
    wintypes.LPCWSTR,  # lpTargetOptionsName : LPCWSTR optional
    DELTA_INPUT,  # GlobalOptions : DELTA_INPUT
    ctypes.c_void_p,  # lpTargetFileTime : FILETIME* optional
    wintypes.DWORD,  # HashAlgId : ALG_ID
    wintypes.LPCWSTR,  # lpDeltaName : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('msdelta.dll')
CreateDeltaW = Fiddle::Function.new(
  lib['CreateDeltaW'],
  [
    Fiddle::TYPE_LONG_LONG,  # FileTypeSet : LONGLONG
    Fiddle::TYPE_LONG_LONG,  # SetFlags : LONGLONG
    Fiddle::TYPE_LONG_LONG,  # ResetFlags : LONGLONG
    Fiddle::TYPE_VOIDP,  # lpSourceName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpTargetName : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpSourceOptionsName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpTargetOptionsName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # GlobalOptions : DELTA_INPUT
    Fiddle::TYPE_VOIDP,  # lpTargetFileTime : FILETIME* optional
    -Fiddle::TYPE_INT,  # HashAlgId : ALG_ID
    Fiddle::TYPE_VOIDP,  # lpDeltaName : LPCWSTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "msdelta")]
extern "system" {
    fn CreateDeltaW(
        FileTypeSet: i64,  // LONGLONG
        SetFlags: i64,  // LONGLONG
        ResetFlags: i64,  // LONGLONG
        lpSourceName: *const u16,  // LPCWSTR
        lpTargetName: *const u16,  // LPCWSTR
        lpSourceOptionsName: *const u16,  // LPCWSTR optional
        lpTargetOptionsName: *const u16,  // LPCWSTR optional
        GlobalOptions: DELTA_INPUT,  // DELTA_INPUT
        lpTargetFileTime: *const FILETIME,  // FILETIME* optional
        HashAlgId: u32,  // ALG_ID
        lpDeltaName: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("msdelta.dll", CharSet = CharSet.Unicode)]
public static extern bool CreateDeltaW(long FileTypeSet, long SetFlags, long ResetFlags, [MarshalAs(UnmanagedType.LPWStr)] string lpSourceName, [MarshalAs(UnmanagedType.LPWStr)] string lpTargetName, [MarshalAs(UnmanagedType.LPWStr)] string lpSourceOptionsName, [MarshalAs(UnmanagedType.LPWStr)] string lpTargetOptionsName, DELTA_INPUT GlobalOptions, IntPtr lpTargetFileTime, uint HashAlgId, [MarshalAs(UnmanagedType.LPWStr)] string lpDeltaName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'msdelta_CreateDeltaW' -Namespace Win32 -PassThru
# $api::CreateDeltaW(FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName)

#uselib "msdelta.dll"
#func global CreateDeltaW "CreateDeltaW" wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr, wptr
; CreateDeltaW FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, varptr(lpTargetFileTime), HashAlgId, lpDeltaName   ; 戻り値は stat
; FileTypeSet : LONGLONG -> "wptr"
; SetFlags : LONGLONG -> "wptr"
; ResetFlags : LONGLONG -> "wptr"
; lpSourceName : LPCWSTR -> "wptr"
; lpTargetName : LPCWSTR -> "wptr"
; lpSourceOptionsName : LPCWSTR optional -> "wptr"
; lpTargetOptionsName : LPCWSTR optional -> "wptr"
; GlobalOptions : DELTA_INPUT -> "wptr"
; lpTargetFileTime : FILETIME* optional -> "wptr"
; HashAlgId : ALG_ID -> "wptr"
; lpDeltaName : LPCWSTR -> "wptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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 (
	msdelta = windows.NewLazySystemDLL("msdelta.dll")
	procCreateDeltaW = msdelta.NewProc("CreateDeltaW")
)

// FileTypeSet (LONGLONG), SetFlags (LONGLONG), ResetFlags (LONGLONG), lpSourceName (LPCWSTR), lpTargetName (LPCWSTR), lpSourceOptionsName (LPCWSTR optional), lpTargetOptionsName (LPCWSTR optional), GlobalOptions (DELTA_INPUT), lpTargetFileTime (FILETIME* optional), HashAlgId (ALG_ID), lpDeltaName (LPCWSTR)
r1, _, err := procCreateDeltaW.Call(
	uintptr(FileTypeSet),
	uintptr(SetFlags),
	uintptr(ResetFlags),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpSourceName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpTargetName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpSourceOptionsName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpTargetOptionsName))),
	uintptr(GlobalOptions),
	uintptr(lpTargetFileTime),
	uintptr(HashAlgId),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpDeltaName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function CreateDeltaW(
  FileTypeSet: Int64;   // LONGLONG
  SetFlags: Int64;   // LONGLONG
  ResetFlags: Int64;   // LONGLONG
  lpSourceName: PWideChar;   // LPCWSTR
  lpTargetName: PWideChar;   // LPCWSTR
  lpSourceOptionsName: PWideChar;   // LPCWSTR optional
  lpTargetOptionsName: PWideChar;   // LPCWSTR optional
  GlobalOptions: DELTA_INPUT;   // DELTA_INPUT
  lpTargetFileTime: Pointer;   // FILETIME* optional
  HashAlgId: DWORD;   // ALG_ID
  lpDeltaName: PWideChar   // LPCWSTR
): BOOL; stdcall;
  external 'msdelta.dll' name 'CreateDeltaW';

result := DllCall("msdelta\CreateDeltaW"
    , "Int64", FileTypeSet   ; LONGLONG
    , "Int64", SetFlags   ; LONGLONG
    , "Int64", ResetFlags   ; LONGLONG
    , "WStr", lpSourceName   ; LPCWSTR
    , "WStr", lpTargetName   ; LPCWSTR
    , "WStr", lpSourceOptionsName   ; LPCWSTR optional
    , "WStr", lpTargetOptionsName   ; LPCWSTR optional
    , "Ptr", GlobalOptions   ; DELTA_INPUT
    , "Ptr", lpTargetFileTime   ; FILETIME* optional
    , "UInt", HashAlgId   ; ALG_ID
    , "WStr", lpDeltaName   ; LPCWSTR
    , "Int")   ; return: BOOL

●CreateDeltaW(FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName) = DLL("msdelta.dll", "bool CreateDeltaW(int64, int64, int64, char*, char*, char*, char*, void*, void*, dword, char*)")
# 呼び出し: CreateDeltaW(FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName)
# FileTypeSet : LONGLONG -> "int64"
# SetFlags : LONGLONG -> "int64"
# ResetFlags : LONGLONG -> "int64"
# lpSourceName : LPCWSTR -> "char*"
# lpTargetName : LPCWSTR -> "char*"
# lpSourceOptionsName : LPCWSTR optional -> "char*"
# lpTargetOptionsName : LPCWSTR optional -> "char*"
# GlobalOptions : DELTA_INPUT -> "void*"
# lpTargetFileTime : FILETIME* optional -> "void*"
# HashAlgId : ALG_ID -> "dword"
# lpDeltaName : LPCWSTR -> "char*"
# 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 "msdelta" fn CreateDeltaW(
    FileTypeSet: i64, // LONGLONG
    SetFlags: i64, // LONGLONG
    ResetFlags: i64, // LONGLONG
    lpSourceName: [*c]const u16, // LPCWSTR
    lpTargetName: [*c]const u16, // LPCWSTR
    lpSourceOptionsName: [*c]const u16, // LPCWSTR optional
    lpTargetOptionsName: [*c]const u16, // LPCWSTR optional
    GlobalOptions: DELTA_INPUT, // DELTA_INPUT
    lpTargetFileTime: [*c]FILETIME, // FILETIME* optional
    HashAlgId: u32, // ALG_ID
    lpDeltaName: [*c]const u16 // LPCWSTR
) 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 CreateDeltaW(
    FileTypeSet: int64,  # LONGLONG
    SetFlags: int64,  # LONGLONG
    ResetFlags: int64,  # LONGLONG
    lpSourceName: WideCString,  # LPCWSTR
    lpTargetName: WideCString,  # LPCWSTR
    lpSourceOptionsName: WideCString,  # LPCWSTR optional
    lpTargetOptionsName: WideCString,  # LPCWSTR optional
    GlobalOptions: DELTA_INPUT,  # DELTA_INPUT
    lpTargetFileTime: ptr FILETIME,  # FILETIME* optional
    HashAlgId: uint32,  # ALG_ID
    lpDeltaName: WideCString  # LPCWSTR
): int32 {.importc: "CreateDeltaW", stdcall, dynlib: "msdelta.dll".}
# Unicode(-W): WideCString は newWideCString("...") で生成。

pragma(lib, "msdelta");
extern(Windows)
int CreateDeltaW(
    long FileTypeSet,   // LONGLONG
    long SetFlags,   // LONGLONG
    long ResetFlags,   // LONGLONG
    const(wchar)* lpSourceName,   // LPCWSTR
    const(wchar)* lpTargetName,   // LPCWSTR
    const(wchar)* lpSourceOptionsName,   // LPCWSTR optional
    const(wchar)* lpTargetOptionsName,   // LPCWSTR optional
    DELTA_INPUT GlobalOptions,   // DELTA_INPUT
    FILETIME* lpTargetFileTime,   // FILETIME* optional
    uint HashAlgId,   // ALG_ID
    const(wchar)* lpDeltaName   // LPCWSTR
);

ccall((:CreateDeltaW, "msdelta.dll"), stdcall, Int32,
      (Int64, Int64, Int64, Cwstring, Cwstring, Cwstring, Cwstring, DELTA_INPUT, Ptr{FILETIME}, UInt32, Cwstring),
      FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName)
# FileTypeSet : LONGLONG -> Int64
# SetFlags : LONGLONG -> Int64
# ResetFlags : LONGLONG -> Int64
# lpSourceName : LPCWSTR -> Cwstring
# lpTargetName : LPCWSTR -> Cwstring
# lpSourceOptionsName : LPCWSTR optional -> Cwstring
# lpTargetOptionsName : LPCWSTR optional -> Cwstring
# GlobalOptions : DELTA_INPUT -> DELTA_INPUT
# lpTargetFileTime : FILETIME* optional -> Ptr{FILETIME}
# HashAlgId : ALG_ID -> UInt32
# lpDeltaName : LPCWSTR -> Cwstring
# 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 CreateDeltaW(
    int64_t FileTypeSet,
    int64_t SetFlags,
    int64_t ResetFlags,
    const uint16_t* lpSourceName,
    const uint16_t* lpTargetName,
    const uint16_t* lpSourceOptionsName,
    const uint16_t* lpTargetOptionsName,
    DELTA_INPUT GlobalOptions,
    void* lpTargetFileTime,
    uint32_t HashAlgId,
    const uint16_t* lpDeltaName);
]]
local msdelta = ffi.load("msdelta")
-- msdelta.CreateDeltaW(FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName)
-- FileTypeSet : LONGLONG
-- SetFlags : LONGLONG
-- ResetFlags : LONGLONG
-- lpSourceName : LPCWSTR
-- lpTargetName : LPCWSTR
-- lpSourceOptionsName : LPCWSTR optional
-- lpTargetOptionsName : LPCWSTR optional
-- GlobalOptions : DELTA_INPUT
-- lpTargetFileTime : FILETIME* optional
-- HashAlgId : ALG_ID
-- lpDeltaName : LPCWSTR
-- 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('msdelta.dll');
const CreateDeltaW = lib.func('__stdcall', 'CreateDeltaW', 'int32_t', ['int64_t', 'int64_t', 'int64_t', 'str16', 'str16', 'str16', 'str16', 'DELTA_INPUT', 'void *', 'uint32_t', 'str16']);
// CreateDeltaW(FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName)
// FileTypeSet : LONGLONG -> 'int64_t'
// SetFlags : LONGLONG -> 'int64_t'
// ResetFlags : LONGLONG -> 'int64_t'
// lpSourceName : LPCWSTR -> 'str16'
// lpTargetName : LPCWSTR -> 'str16'
// lpSourceOptionsName : LPCWSTR optional -> 'str16'
// lpTargetOptionsName : LPCWSTR optional -> 'str16'
// GlobalOptions : DELTA_INPUT -> 'DELTA_INPUT'
// lpTargetFileTime : FILETIME* optional -> 'void *'
// HashAlgId : ALG_ID -> 'uint32_t'
// lpDeltaName : LPCWSTR -> 'str16'
// 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("msdelta.dll", {
  CreateDeltaW: { parameters: ["i64", "i64", "i64", "buffer", "buffer", "buffer", "buffer", "buffer", "pointer", "u32", "buffer"], result: "i32" },
});
// lib.symbols.CreateDeltaW(FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName)
// FileTypeSet : LONGLONG -> "i64"
// SetFlags : LONGLONG -> "i64"
// ResetFlags : LONGLONG -> "i64"
// lpSourceName : LPCWSTR -> "buffer"
// lpTargetName : LPCWSTR -> "buffer"
// lpSourceOptionsName : LPCWSTR optional -> "buffer"
// lpTargetOptionsName : LPCWSTR optional -> "buffer"
// GlobalOptions : DELTA_INPUT -> "buffer"
// lpTargetFileTime : FILETIME* optional -> "pointer"
// HashAlgId : ALG_ID -> "u32"
// lpDeltaName : LPCWSTR -> "buffer"
// 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 CreateDeltaW(
    int64_t FileTypeSet,
    int64_t SetFlags,
    int64_t ResetFlags,
    const uint16_t* lpSourceName,
    const uint16_t* lpTargetName,
    const uint16_t* lpSourceOptionsName,
    const uint16_t* lpTargetOptionsName,
    DELTA_INPUT GlobalOptions,
    void* lpTargetFileTime,
    uint32_t HashAlgId,
    const uint16_t* lpDeltaName);
C, "msdelta.dll");
// $ffi->CreateDeltaW(FileTypeSet, SetFlags, ResetFlags, lpSourceName, lpTargetName, lpSourceOptionsName, lpTargetOptionsName, GlobalOptions, lpTargetFileTime, HashAlgId, lpDeltaName);
// FileTypeSet : LONGLONG
// SetFlags : LONGLONG
// ResetFlags : LONGLONG
// lpSourceName : LPCWSTR
// lpTargetName : LPCWSTR
// lpSourceOptionsName : LPCWSTR optional
// lpTargetOptionsName : LPCWSTR optional
// GlobalOptions : DELTA_INPUT
// lpTargetFileTime : FILETIME* optional
// HashAlgId : ALG_ID
// lpDeltaName : LPCWSTR
// 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 Msdelta extends StdCallLibrary {
    Msdelta INSTANCE = Native.load("msdelta", Msdelta.class, W32APIOptions.UNICODE_OPTIONS);
    boolean CreateDeltaW(
        long FileTypeSet,   // LONGLONG
        long SetFlags,   // LONGLONG
        long ResetFlags,   // LONGLONG
        WString lpSourceName,   // LPCWSTR
        WString lpTargetName,   // LPCWSTR
        WString lpSourceOptionsName,   // LPCWSTR optional
        WString lpTargetOptionsName,   // LPCWSTR optional
        DELTA_INPUT /* extends Structure (by value) */ GlobalOptions,   // DELTA_INPUT
        Pointer lpTargetFileTime,   // FILETIME* optional
        int HashAlgId,   // ALG_ID
        WString lpDeltaName   // LPCWSTR
    );
}
// Unicode(-W): WString(入力)/char[](出力)で UTF-16 をマーシャリング。

@[Link("msdelta")]
lib Libmsdelta
  fun CreateDeltaW = CreateDeltaW(
    FileTypeSet : Int64,   # LONGLONG
    SetFlags : Int64,   # LONGLONG
    ResetFlags : Int64,   # LONGLONG
    lpSourceName : UInt16*,   # LPCWSTR
    lpTargetName : UInt16*,   # LPCWSTR
    lpSourceOptionsName : UInt16*,   # LPCWSTR optional
    lpTargetOptionsName : UInt16*,   # LPCWSTR optional
    GlobalOptions : DELTA_INPUT,   # DELTA_INPUT
    lpTargetFileTime : FILETIME*,   # FILETIME* optional
    HashAlgId : UInt32,   # ALG_ID
    lpDeltaName : UInt16*   # LPCWSTR
  ) : 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 CreateDeltaWNative = Int32 Function(Int64, Int64, Int64, Pointer<Utf16>, Pointer<Utf16>, Pointer<Utf16>, Pointer<Utf16>, DELTA_INPUT, Pointer<Void>, Uint32, Pointer<Utf16>);
typedef CreateDeltaWDart = int Function(int, int, int, Pointer<Utf16>, Pointer<Utf16>, Pointer<Utf16>, Pointer<Utf16>, int, Pointer<Void>, int, Pointer<Utf16>);
final CreateDeltaW = DynamicLibrary.open('msdelta.dll')
    .lookupFunction<CreateDeltaWNative, CreateDeltaWDart>('CreateDeltaW');
// FileTypeSet : LONGLONG -> Int64
// SetFlags : LONGLONG -> Int64
// ResetFlags : LONGLONG -> Int64
// lpSourceName : LPCWSTR -> Pointer<Utf16>
// lpTargetName : LPCWSTR -> Pointer<Utf16>
// lpSourceOptionsName : LPCWSTR optional -> Pointer<Utf16>
// lpTargetOptionsName : LPCWSTR optional -> Pointer<Utf16>
// GlobalOptions : DELTA_INPUT -> DELTA_INPUT
// lpTargetFileTime : FILETIME* optional -> Pointer<Void>
// HashAlgId : ALG_ID -> Uint32
// lpDeltaName : LPCWSTR -> Pointer<Utf16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function CreateDeltaW(
  FileTypeSet: Int64;   // LONGLONG
  SetFlags: Int64;   // LONGLONG
  ResetFlags: Int64;   // LONGLONG
  lpSourceName: PWideChar;   // LPCWSTR
  lpTargetName: PWideChar;   // LPCWSTR
  lpSourceOptionsName: PWideChar;   // LPCWSTR optional
  lpTargetOptionsName: PWideChar;   // LPCWSTR optional
  GlobalOptions: DELTA_INPUT;   // DELTA_INPUT
  lpTargetFileTime: Pointer;   // FILETIME* optional
  HashAlgId: DWORD;   // ALG_ID
  lpDeltaName: PWideChar   // LPCWSTR
): BOOL; stdcall;
  external 'msdelta.dll' name 'CreateDeltaW';

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

foreign import stdcall safe "CreateDeltaW"
  c_CreateDeltaW :: Int64 -> Int64 -> Int64 -> CWString -> CWString -> CWString -> CWString -> DELTA_INPUT -> Ptr () -> Word32 -> CWString -> IO CInt
-- FileTypeSet : LONGLONG -> Int64
-- SetFlags : LONGLONG -> Int64
-- ResetFlags : LONGLONG -> Int64
-- lpSourceName : LPCWSTR -> CWString
-- lpTargetName : LPCWSTR -> CWString
-- lpSourceOptionsName : LPCWSTR optional -> CWString
-- lpTargetOptionsName : LPCWSTR optional -> CWString
-- GlobalOptions : DELTA_INPUT -> DELTA_INPUT
-- lpTargetFileTime : FILETIME* optional -> Ptr ()
-- HashAlgId : ALG_ID -> Word32
-- lpDeltaName : LPCWSTR -> CWString
-- 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。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let createdeltaw =
  foreign "CreateDeltaW"
    (int64_t @-> int64_t @-> int64_t @-> (ptr uint16_t) @-> (ptr uint16_t) @-> (ptr uint16_t) @-> (ptr uint16_t) @-> DELTA_INPUT @-> (ptr void) @-> uint32_t @-> (ptr uint16_t) @-> returning int32_t)
(* FileTypeSet : LONGLONG -> int64_t *)
(* SetFlags : LONGLONG -> int64_t *)
(* ResetFlags : LONGLONG -> int64_t *)
(* lpSourceName : LPCWSTR -> (ptr uint16_t) *)
(* lpTargetName : LPCWSTR -> (ptr uint16_t) *)
(* lpSourceOptionsName : LPCWSTR optional -> (ptr uint16_t) *)
(* lpTargetOptionsName : LPCWSTR optional -> (ptr uint16_t) *)
(* GlobalOptions : DELTA_INPUT -> DELTA_INPUT *)
(* lpTargetFileTime : FILETIME* optional -> (ptr void) *)
(* HashAlgId : ALG_ID -> uint32_t *)
(* lpDeltaName : LPCWSTR -> (ptr uint16_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 msdelta (t "msdelta.dll"))
(cffi:use-foreign-library msdelta)

(cffi:defcfun ("CreateDeltaW" create-delta-w :convention :stdcall) :int32
  (file-type-set :int64)   ; LONGLONG
  (set-flags :int64)   ; LONGLONG
  (reset-flags :int64)   ; LONGLONG
  (lp-source-name (:string :encoding :utf-16le))   ; LPCWSTR
  (lp-target-name (:string :encoding :utf-16le))   ; LPCWSTR
  (lp-source-options-name (:string :encoding :utf-16le))   ; LPCWSTR optional
  (lp-target-options-name (:string :encoding :utf-16le))   ; LPCWSTR optional
  (global-options (:struct delta-input))   ; DELTA_INPUT
  (lp-target-file-time :pointer)   ; FILETIME* optional
  (hash-alg-id :uint32)   ; ALG_ID
  (lp-delta-name (:string :encoding :utf-16le)))   ; LPCWSTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $CreateDeltaW = Win32::API::More->new('msdelta',
    'BOOL CreateDeltaW(INT64 FileTypeSet, INT64 SetFlags, INT64 ResetFlags, LPCWSTR lpSourceName, LPCWSTR lpTargetName, LPCWSTR lpSourceOptionsName, LPCWSTR lpTargetOptionsName, LPVOID GlobalOptions, LPVOID lpTargetFileTime, DWORD HashAlgId, LPCWSTR lpDeltaName)');
# my $ret = $CreateDeltaW->Call($FileTypeSet, $SetFlags, $ResetFlags, $lpSourceName, $lpTargetName, $lpSourceOptionsName, $lpTargetOptionsName, $GlobalOptions, $lpTargetFileTime, $HashAlgId, $lpDeltaName);
# FileTypeSet : LONGLONG -> INT64
# SetFlags : LONGLONG -> INT64
# ResetFlags : LONGLONG -> INT64
# lpSourceName : LPCWSTR -> LPCWSTR
# lpTargetName : LPCWSTR -> LPCWSTR
# lpSourceOptionsName : LPCWSTR optional -> LPCWSTR
# lpTargetOptionsName : LPCWSTR optional -> LPCWSTR
# GlobalOptions : DELTA_INPUT -> LPVOID
# lpTargetFileTime : FILETIME* optional -> LPVOID
# HashAlgId : ALG_ID -> DWORD
# lpDeltaName : LPCWSTR -> LPCWSTR
# 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。