JetGetLogInfoW

関数

外部バックアップ対象のログファイル一覧を取得する(Unicode版)。

DLLESENT.dll文字セットUnicode (-W)呼出規約winapi

シグネチャ

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

INT JetGetLogInfoW(
    WORD* szzLogs,   // optional
    DWORD cbMax,
    DWORD* pcbActual   // optional
);

パラメーター

名前	型	方向
szzLogs	WORD*	outoptional
cbMax	DWORD	in
pcbActual	DWORD*	outoptional

戻り値の型: INT

各言語での呼び出し定義

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

INT JetGetLogInfoW(
    WORD* szzLogs,   // optional
    DWORD cbMax,
    DWORD* pcbActual   // optional
);

[DllImport("ESENT.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
static extern int JetGetLogInfoW(
    IntPtr szzLogs,   // WORD* optional, out
    uint cbMax,   // DWORD
    IntPtr pcbActual   // DWORD* optional, out
);

<DllImport("ESENT.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function JetGetLogInfoW(
    szzLogs As IntPtr,   ' WORD* optional, out
    cbMax As UInteger,   ' DWORD
    pcbActual As IntPtr   ' DWORD* optional, out
) As Integer
End Function

' szzLogs : WORD* optional, out
' cbMax : DWORD
' pcbActual : DWORD* optional, out
Declare PtrSafe Function JetGetLogInfoW Lib "esent" ( _
    ByVal szzLogs As LongPtr, _
    ByVal cbMax As Long, _
    ByVal pcbActual 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

JetGetLogInfoW = ctypes.windll.esent.JetGetLogInfoW
JetGetLogInfoW.restype = ctypes.c_int
JetGetLogInfoW.argtypes = [
    ctypes.POINTER(ctypes.c_ushort),  # szzLogs : WORD* optional, out
    wintypes.DWORD,  # cbMax : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pcbActual : DWORD* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetGetLogInfoW = Fiddle::Function.new(
  lib['JetGetLogInfoW'],
  [
    Fiddle::TYPE_VOIDP,  # szzLogs : WORD* optional, out
    -Fiddle::TYPE_INT,  # cbMax : DWORD
    Fiddle::TYPE_VOIDP,  # pcbActual : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "esent")]
extern "system" {
    fn JetGetLogInfoW(
        szzLogs: *mut u16,  // WORD* optional, out
        cbMax: u32,  // DWORD
        pcbActual: *mut u32  // DWORD* optional, out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ESENT.dll", CharSet = CharSet.Unicode)]
public static extern int JetGetLogInfoW(IntPtr szzLogs, uint cbMax, IntPtr pcbActual);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetGetLogInfoW' -Namespace Win32 -PassThru
# $api::JetGetLogInfoW(szzLogs, cbMax, pcbActual)

#uselib "ESENT.dll"
#func global JetGetLogInfoW "JetGetLogInfoW" wptr, wptr, wptr
; JetGetLogInfoW varptr(szzLogs), cbMax, varptr(pcbActual)   ; 戻り値は stat
; szzLogs : WORD* optional, out -> "wptr"
; cbMax : DWORD -> "wptr"
; pcbActual : DWORD* optional, out -> "wptr"
; ※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 "ESENT.dll"
#cfunc global JetGetLogInfoW "JetGetLogInfoW" var, int, var
; res = JetGetLogInfoW(szzLogs, cbMax, pcbActual)
; szzLogs : WORD* optional, out -> "var"
; cbMax : DWORD -> "int"
; pcbActual : 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 "ESENT.dll"
#cfunc global JetGetLogInfoW "JetGetLogInfoW" sptr, int, sptr
; res = JetGetLogInfoW(varptr(szzLogs), cbMax, varptr(pcbActual))
; szzLogs : WORD* optional, out -> "sptr"
; cbMax : DWORD -> "int"
; pcbActual : 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:

; INT JetGetLogInfoW(WORD* szzLogs, DWORD cbMax, DWORD* pcbActual)
#uselib "ESENT.dll"
#cfunc global JetGetLogInfoW "JetGetLogInfoW" var, int, var
; res = JetGetLogInfoW(szzLogs, cbMax, pcbActual)
; szzLogs : WORD* optional, out -> "var"
; cbMax : DWORD -> "int"
; pcbActual : 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。; INT JetGetLogInfoW(WORD* szzLogs, DWORD cbMax, DWORD* pcbActual)
#uselib "ESENT.dll"
#cfunc global JetGetLogInfoW "JetGetLogInfoW" intptr, int, intptr
; res = JetGetLogInfoW(varptr(szzLogs), cbMax, varptr(pcbActual))
; szzLogs : WORD* optional, out -> "intptr"
; cbMax : DWORD -> "int"
; pcbActual : 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 (
	esent = windows.NewLazySystemDLL("ESENT.dll")
	procJetGetLogInfoW = esent.NewProc("JetGetLogInfoW")
)

// szzLogs (WORD* optional, out), cbMax (DWORD), pcbActual (DWORD* optional, out)
r1, _, err := procJetGetLogInfoW.Call(
	uintptr(szzLogs),
	uintptr(cbMax),
	uintptr(pcbActual),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetGetLogInfoW(
  szzLogs: Pointer;   // WORD* optional, out
  cbMax: DWORD;   // DWORD
  pcbActual: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'ESENT.dll' name 'JetGetLogInfoW';

result := DllCall("ESENT\JetGetLogInfoW"
    , "Ptr", szzLogs   ; WORD* optional, out
    , "UInt", cbMax   ; DWORD
    , "Ptr", pcbActual   ; DWORD* optional, out
    , "Int")   ; return: INT

●JetGetLogInfoW(szzLogs, cbMax, pcbActual) = DLL("ESENT.dll", "int JetGetLogInfoW(void*, dword, void*)")
# 呼び出し: JetGetLogInfoW(szzLogs, cbMax, pcbActual)
# szzLogs : WORD* optional, out -> "void*"
# cbMax : DWORD -> "dword"
# pcbActual : 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。