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FindNextFileNameW

関数

ファイルに対する次のハードリンク名を取得する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

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

BOOL FindNextFileNameW(
    HANDLE hFindStream,
    DWORD* StringLength,
    LPWSTR LinkName
);

パラメーター

名前	型	方向
hFindStream	HANDLE	in
StringLength	DWORD*	inout
LinkName	LPWSTR	out

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL FindNextFileNameW(
    HANDLE hFindStream,
    DWORD* StringLength,
    LPWSTR LinkName
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool FindNextFileNameW(
    IntPtr hFindStream,   // HANDLE
    ref uint StringLength,   // DWORD* in/out
    [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder LinkName   // LPWSTR out
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FindNextFileNameW(
    hFindStream As IntPtr,   ' HANDLE
    ByRef StringLength As UInteger,   ' DWORD* in/out
    <MarshalAs(UnmanagedType.LPWStr)> LinkName As System.Text.StringBuilder   ' LPWSTR out
) As Boolean
End Function

' hFindStream : HANDLE
' StringLength : DWORD* in/out
' LinkName : LPWSTR out
Declare PtrSafe Function FindNextFileNameW Lib "kernel32" ( _
    ByVal hFindStream As LongPtr, _
    ByRef StringLength As Long, _
    ByVal LinkName 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

FindNextFileNameW = ctypes.windll.kernel32.FindNextFileNameW
FindNextFileNameW.restype = wintypes.BOOL
FindNextFileNameW.argtypes = [
    wintypes.HANDLE,  # hFindStream : HANDLE
    ctypes.POINTER(wintypes.DWORD),  # StringLength : DWORD* in/out
    wintypes.LPWSTR,  # LinkName : LPWSTR out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
FindNextFileNameW = Fiddle::Function.new(
  lib['FindNextFileNameW'],
  [
    Fiddle::TYPE_VOIDP,  # hFindStream : HANDLE
    Fiddle::TYPE_VOIDP,  # StringLength : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # LinkName : LPWSTR out
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn FindNextFileNameW(
        hFindStream: *mut core::ffi::c_void,  // HANDLE
        StringLength: *mut u32,  // DWORD* in/out
        LinkName: *mut u16  // LPWSTR out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool FindNextFileNameW(IntPtr hFindStream, ref uint StringLength, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder LinkName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_FindNextFileNameW' -Namespace Win32 -PassThru
# $api::FindNextFileNameW(hFindStream, StringLength, LinkName)

#uselib "KERNEL32.dll"
#func global FindNextFileNameW "FindNextFileNameW" sptr, sptr, sptr
; FindNextFileNameW hFindStream, varptr(StringLength), varptr(LinkName)   ; 戻り値は stat
; hFindStream : HANDLE -> "sptr"
; StringLength : DWORD* in/out -> "sptr"
; LinkName : LPWSTR 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 FindNextFileNameW "FindNextFileNameW" sptr, var, var
; res = FindNextFileNameW(hFindStream, StringLength, LinkName)
; hFindStream : HANDLE -> "sptr"
; StringLength : DWORD* in/out -> "var"
; LinkName : LPWSTR 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 FindNextFileNameW "FindNextFileNameW" sptr, sptr, sptr
; res = FindNextFileNameW(hFindStream, varptr(StringLength), varptr(LinkName))
; hFindStream : HANDLE -> "sptr"
; StringLength : DWORD* in/out -> "sptr"
; LinkName : LPWSTR 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:

; BOOL FindNextFileNameW(HANDLE hFindStream, DWORD* StringLength, LPWSTR LinkName)
#uselib "KERNEL32.dll"
#cfunc global FindNextFileNameW "FindNextFileNameW" intptr, var, var
; res = FindNextFileNameW(hFindStream, StringLength, LinkName)
; hFindStream : HANDLE -> "intptr"
; StringLength : DWORD* in/out -> "var"
; LinkName : LPWSTR 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 FindNextFileNameW(HANDLE hFindStream, DWORD* StringLength, LPWSTR LinkName)
#uselib "KERNEL32.dll"
#cfunc global FindNextFileNameW "FindNextFileNameW" intptr, intptr, intptr
; res = FindNextFileNameW(hFindStream, varptr(StringLength), varptr(LinkName))
; hFindStream : HANDLE -> "intptr"
; StringLength : DWORD* in/out -> "intptr"
; LinkName : LPWSTR 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")
	procFindNextFileNameW = kernel32.NewProc("FindNextFileNameW")
)

// hFindStream (HANDLE), StringLength (DWORD* in/out), LinkName (LPWSTR out)
r1, _, err := procFindNextFileNameW.Call(
	uintptr(hFindStream),
	uintptr(StringLength),
	uintptr(LinkName),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FindNextFileNameW(
  hFindStream: THandle;   // HANDLE
  StringLength: Pointer;   // DWORD* in/out
  LinkName: PWideChar   // LPWSTR out
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'FindNextFileNameW';

result := DllCall("KERNEL32\FindNextFileNameW"
    , "Ptr", hFindStream   ; HANDLE
    , "Ptr", StringLength   ; DWORD* in/out
    , "Ptr", LinkName   ; LPWSTR out
    , "Int")   ; return: BOOL

●FindNextFileNameW(hFindStream, StringLength, LinkName) = DLL("KERNEL32.dll", "bool FindNextFileNameW(void*, void*, char*)")
# 呼び出し: FindNextFileNameW(hFindStream, StringLength, LinkName)
# hFindStream : HANDLE -> "void*"
# StringLength : DWORD* in/out -> "void*"
# LinkName : LPWSTR out -> "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)。