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GetCompressedFileSizeA

関数

圧縮ファイルの実際のディスク使用サイズを取得する(ANSI版)。

DLLKERNEL32.dll文字セットANSI (-A)呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

DWORD GetCompressedFileSizeA(
    LPCSTR lpFileName,
    DWORD* lpFileSizeHigh   // optional
);

パラメーター

名前	型	方向
lpFileName	LPCSTR	in
lpFileSizeHigh	DWORD*	outoptional

戻り値の型: DWORD

各言語での呼び出し定義

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

DWORD GetCompressedFileSizeA(
    LPCSTR lpFileName,
    DWORD* lpFileSizeHigh   // optional
);

[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
static extern uint GetCompressedFileSizeA(
    [MarshalAs(UnmanagedType.LPStr)] string lpFileName,   // LPCSTR
    IntPtr lpFileSizeHigh   // DWORD* optional, out
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetCompressedFileSizeA(
    <MarshalAs(UnmanagedType.LPStr)> lpFileName As String,   ' LPCSTR
    lpFileSizeHigh As IntPtr   ' DWORD* optional, out
) As UInteger
End Function

' lpFileName : LPCSTR
' lpFileSizeHigh : DWORD* optional, out
Declare PtrSafe Function GetCompressedFileSizeA Lib "kernel32" ( _
    ByVal lpFileName As String, _
    ByVal lpFileSizeHigh 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

GetCompressedFileSizeA = ctypes.windll.kernel32.GetCompressedFileSizeA
GetCompressedFileSizeA.restype = wintypes.DWORD
GetCompressedFileSizeA.argtypes = [
    wintypes.LPCSTR,  # lpFileName : LPCSTR
    ctypes.POINTER(wintypes.DWORD),  # lpFileSizeHigh : DWORD* optional, out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetCompressedFileSizeA = Fiddle::Function.new(
  lib['GetCompressedFileSizeA'],
  [
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCSTR
    Fiddle::TYPE_VOIDP,  # lpFileSizeHigh : DWORD* optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetCompressedFileSizeA(
        lpFileName: *const u8,  // LPCSTR
        lpFileSizeHigh: *mut u32  // DWORD* optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern uint GetCompressedFileSizeA([MarshalAs(UnmanagedType.LPStr)] string lpFileName, IntPtr lpFileSizeHigh);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetCompressedFileSizeA' -Namespace Win32 -PassThru
# $api::GetCompressedFileSizeA(lpFileName, lpFileSizeHigh)

#uselib "KERNEL32.dll"
#func global GetCompressedFileSizeA "GetCompressedFileSizeA" sptr, sptr
; GetCompressedFileSizeA lpFileName, varptr(lpFileSizeHigh)   ; 戻り値は stat
; lpFileName : LPCSTR -> "sptr"
; lpFileSizeHigh : 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。

出力引数:

#uselib "KERNEL32.dll"
#cfunc global GetCompressedFileSizeA "GetCompressedFileSizeA" str, var
; res = GetCompressedFileSizeA(lpFileName, lpFileSizeHigh)
; lpFileName : LPCSTR -> "str"
; lpFileSizeHigh : DWORD* 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。#uselib "KERNEL32.dll"
#cfunc global GetCompressedFileSizeA "GetCompressedFileSizeA" str, sptr
; res = GetCompressedFileSizeA(lpFileName, varptr(lpFileSizeHigh))
; lpFileName : LPCSTR -> "str"
; lpFileSizeHigh : DWORD* optional, out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; DWORD GetCompressedFileSizeA(LPCSTR lpFileName, DWORD* lpFileSizeHigh)
#uselib "KERNEL32.dll"
#cfunc global GetCompressedFileSizeA "GetCompressedFileSizeA" str, var
; res = GetCompressedFileSizeA(lpFileName, lpFileSizeHigh)
; lpFileName : LPCSTR -> "str"
; lpFileSizeHigh : DWORD* 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。; DWORD GetCompressedFileSizeA(LPCSTR lpFileName, DWORD* lpFileSizeHigh)
#uselib "KERNEL32.dll"
#cfunc global GetCompressedFileSizeA "GetCompressedFileSizeA" str, intptr
; res = GetCompressedFileSizeA(lpFileName, varptr(lpFileSizeHigh))
; lpFileName : LPCSTR -> "str"
; lpFileSizeHigh : DWORD* optional, out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetCompressedFileSizeA = kernel32.NewProc("GetCompressedFileSizeA")
)

// lpFileName (LPCSTR), lpFileSizeHigh (DWORD* optional, out)
r1, _, err := procGetCompressedFileSizeA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpFileName))),
	uintptr(lpFileSizeHigh),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetCompressedFileSizeA(
  lpFileName: PAnsiChar;   // LPCSTR
  lpFileSizeHigh: Pointer   // DWORD* optional, out
): DWORD; stdcall;
  external 'KERNEL32.dll' name 'GetCompressedFileSizeA';

result := DllCall("KERNEL32\GetCompressedFileSizeA"
    , "AStr", lpFileName   ; LPCSTR
    , "Ptr", lpFileSizeHigh   ; DWORD* optional, out
    , "UInt")   ; return: DWORD

●GetCompressedFileSizeA(lpFileName, lpFileSizeHigh) = DLL("KERNEL32.dll", "dword GetCompressedFileSizeA(char*, void*)")
# 呼び出し: GetCompressedFileSizeA(lpFileName, lpFileSizeHigh)
# lpFileName : LPCSTR -> "char*"
# lpFileSizeHigh : 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)。