Decompress

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

BOOL Decompress(
    DECOMPRESSOR_HANDLE DecompressorHandle,
    const void* CompressedData,   // optional
    UINT_PTR CompressedDataSize,
    void* UncompressedBuffer,   // optional
    UINT_PTR UncompressedBufferSize,
    UINT_PTR* UncompressedDataSize   // optional
);

<DllImport("Cabinet.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function Decompress(
    DecompressorHandle As IntPtr,   ' DECOMPRESSOR_HANDLE
    CompressedData As IntPtr,   ' void* optional
    CompressedDataSize As UIntPtr,   ' UINT_PTR
    UncompressedBuffer As IntPtr,   ' void* optional, out
    UncompressedBufferSize As UIntPtr,   ' UINT_PTR
    UncompressedDataSize As IntPtr   ' UINT_PTR* optional, out
) As Boolean
End Function

' DecompressorHandle : DECOMPRESSOR_HANDLE
' CompressedData : void* optional
' CompressedDataSize : UINT_PTR
' UncompressedBuffer : void* optional, out
' UncompressedBufferSize : UINT_PTR
' UncompressedDataSize : UINT_PTR* optional, out
Declare PtrSafe Function Decompress Lib "cabinet" ( _
    ByVal DecompressorHandle As LongPtr, _
    ByVal CompressedData As LongPtr, _
    ByVal CompressedDataSize As LongPtr, _
    ByVal UncompressedBuffer As LongPtr, _
    ByVal UncompressedBufferSize As LongPtr, _
    ByVal UncompressedDataSize 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

Decompress = ctypes.windll.cabinet.Decompress
Decompress.restype = wintypes.BOOL
Decompress.argtypes = [
    wintypes.HANDLE,  # DecompressorHandle : DECOMPRESSOR_HANDLE
    ctypes.POINTER(None),  # CompressedData : void* optional
    ctypes.c_size_t,  # CompressedDataSize : UINT_PTR
    ctypes.POINTER(None),  # UncompressedBuffer : void* optional, out
    ctypes.c_size_t,  # UncompressedBufferSize : UINT_PTR
    ctypes.POINTER(ctypes.c_size_t),  # UncompressedDataSize : UINT_PTR* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('Cabinet.dll')
Decompress = Fiddle::Function.new(
  lib['Decompress'],
  [
    Fiddle::TYPE_VOIDP,  # DecompressorHandle : DECOMPRESSOR_HANDLE
    Fiddle::TYPE_VOIDP,  # CompressedData : void* optional
    Fiddle::TYPE_UINTPTR_T,  # CompressedDataSize : UINT_PTR
    Fiddle::TYPE_VOIDP,  # UncompressedBuffer : void* optional, out
    Fiddle::TYPE_UINTPTR_T,  # UncompressedBufferSize : UINT_PTR
    Fiddle::TYPE_VOIDP,  # UncompressedDataSize : UINT_PTR* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "cabinet")]
extern "system" {
    fn Decompress(
        DecompressorHandle: *mut core::ffi::c_void,  // DECOMPRESSOR_HANDLE
        CompressedData: *const (),  // void* optional
        CompressedDataSize: usize,  // UINT_PTR
        UncompressedBuffer: *mut (),  // void* optional, out
        UncompressedBufferSize: usize,  // UINT_PTR
        UncompressedDataSize: *mut usize  // UINT_PTR* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("Cabinet.dll", SetLastError = true)]
public static extern bool Decompress(IntPtr DecompressorHandle, IntPtr CompressedData, UIntPtr CompressedDataSize, IntPtr UncompressedBuffer, UIntPtr UncompressedBufferSize, IntPtr UncompressedDataSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'Cabinet_Decompress' -Namespace Win32 -PassThru
# $api::Decompress(DecompressorHandle, CompressedData, CompressedDataSize, UncompressedBuffer, UncompressedBufferSize, UncompressedDataSize)

#uselib "Cabinet.dll"
#func global Decompress "Decompress" sptr, sptr, sptr, sptr, sptr, sptr
; Decompress DecompressorHandle, CompressedData, CompressedDataSize, UncompressedBuffer, UncompressedBufferSize, varptr(UncompressedDataSize)   ; 戻り値は stat
; DecompressorHandle : DECOMPRESSOR_HANDLE -> "sptr"
; CompressedData : void* optional -> "sptr"
; CompressedDataSize : UINT_PTR -> "sptr"
; UncompressedBuffer : void* optional, out -> "sptr"
; UncompressedBufferSize : UINT_PTR -> "sptr"
; UncompressedDataSize : UINT_PTR* 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。

#uselib "Cabinet.dll"
#cfunc global Decompress "Decompress" sptr, sptr, sptr, sptr, sptr, var
; res = Decompress(DecompressorHandle, CompressedData, CompressedDataSize, UncompressedBuffer, UncompressedBufferSize, UncompressedDataSize)
; DecompressorHandle : DECOMPRESSOR_HANDLE -> "sptr"
; CompressedData : void* optional -> "sptr"
; CompressedDataSize : UINT_PTR -> "sptr"
; UncompressedBuffer : void* optional, out -> "sptr"
; UncompressedBufferSize : UINT_PTR -> "sptr"
; UncompressedDataSize : UINT_PTR* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL Decompress(DECOMPRESSOR_HANDLE DecompressorHandle, void* CompressedData, UINT_PTR CompressedDataSize, void* UncompressedBuffer, UINT_PTR UncompressedBufferSize, UINT_PTR* UncompressedDataSize)
#uselib "Cabinet.dll"
#cfunc global Decompress "Decompress" intptr, intptr, intptr, intptr, intptr, var
; res = Decompress(DecompressorHandle, CompressedData, CompressedDataSize, UncompressedBuffer, UncompressedBufferSize, UncompressedDataSize)
; DecompressorHandle : DECOMPRESSOR_HANDLE -> "intptr"
; CompressedData : void* optional -> "intptr"
; CompressedDataSize : UINT_PTR -> "intptr"
; UncompressedBuffer : void* optional, out -> "intptr"
; UncompressedBufferSize : UINT_PTR -> "intptr"
; UncompressedDataSize : UINT_PTR* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	cabinet = windows.NewLazySystemDLL("Cabinet.dll")
	procDecompress = cabinet.NewProc("Decompress")
)

// DecompressorHandle (DECOMPRESSOR_HANDLE), CompressedData (void* optional), CompressedDataSize (UINT_PTR), UncompressedBuffer (void* optional, out), UncompressedBufferSize (UINT_PTR), UncompressedDataSize (UINT_PTR* optional, out)
r1, _, err := procDecompress.Call(
	uintptr(DecompressorHandle),
	uintptr(CompressedData),
	uintptr(CompressedDataSize),
	uintptr(UncompressedBuffer),
	uintptr(UncompressedBufferSize),
	uintptr(UncompressedDataSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function Decompress(
  DecompressorHandle: THandle;   // DECOMPRESSOR_HANDLE
  CompressedData: Pointer;   // void* optional
  CompressedDataSize: NativeUInt;   // UINT_PTR
  UncompressedBuffer: Pointer;   // void* optional, out
  UncompressedBufferSize: NativeUInt;   // UINT_PTR
  UncompressedDataSize: Pointer   // UINT_PTR* optional, out
): BOOL; stdcall;
  external 'Cabinet.dll' name 'Decompress';

result := DllCall("Cabinet\Decompress"
    , "Ptr", DecompressorHandle   ; DECOMPRESSOR_HANDLE
    , "Ptr", CompressedData   ; void* optional
    , "UPtr", CompressedDataSize   ; UINT_PTR
    , "Ptr", UncompressedBuffer   ; void* optional, out
    , "UPtr", UncompressedBufferSize   ; UINT_PTR
    , "Ptr", UncompressedDataSize   ; UINT_PTR* optional, out
    , "Int")   ; return: BOOL

●Decompress(DecompressorHandle, CompressedData, CompressedDataSize, UncompressedBuffer, UncompressedBufferSize, UncompressedDataSize) = DLL("Cabinet.dll", "bool Decompress(void*, void*, int, void*, int, void*)")
# 呼び出し: Decompress(DecompressorHandle, CompressedData, CompressedDataSize, UncompressedBuffer, UncompressedBufferSize, UncompressedDataSize)
# DecompressorHandle : DECOMPRESSOR_HANDLE -> "void*"
# CompressedData : void* optional -> "void*"
# CompressedDataSize : UINT_PTR -> "int"
# UncompressedBuffer : void* optional, out -> "void*"
# UncompressedBufferSize : UINT_PTR -> "int"
# UncompressedDataSize : UINT_PTR* 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)。