JetGetLogInfoA

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(ANSI版)。

DLLESENT.dll文字セットANSI (-A)呼出規約winapi

シグネチャ

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

INT JetGetLogInfoA(
    CHAR* szzLogs,   // optional
    DWORD cbMax,
    DWORD* pcbActual   // optional
);

パラメーター

名前	型	方向
szzLogs	CHAR*	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  (ANSI / -A)
#include <windows.h>

INT JetGetLogInfoA(
    CHAR* szzLogs,   // optional
    DWORD cbMax,
    DWORD* pcbActual   // optional
);

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

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

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

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

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetGetLogInfoA = Fiddle::Function.new(
  lib['JetGetLogInfoA'],
  [
    Fiddle::TYPE_VOIDP,  # szzLogs : CHAR* optional, out
    -Fiddle::TYPE_INT,  # cbMax : DWORD
    Fiddle::TYPE_VOIDP,  # pcbActual : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)

#[link(name = "esent")]
extern "system" {
    fn JetGetLogInfoA(
        szzLogs: *mut i8,  // CHAR* 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.Ansi)]
public static extern int JetGetLogInfoA(IntPtr szzLogs, uint cbMax, IntPtr pcbActual);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetGetLogInfoA' -Namespace Win32 -PassThru
# $api::JetGetLogInfoA(szzLogs, cbMax, pcbActual)

#uselib "ESENT.dll"
#func global JetGetLogInfoA "JetGetLogInfoA" sptr, sptr, sptr
; JetGetLogInfoA varptr(szzLogs), cbMax, varptr(pcbActual)   ; 戻り値は stat
; szzLogs : CHAR* optional, out -> "sptr"
; cbMax : DWORD -> "sptr"
; pcbActual : 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 "ESENT.dll"
#cfunc global JetGetLogInfoA "JetGetLogInfoA" var, int, var
; res = JetGetLogInfoA(szzLogs, cbMax, pcbActual)
; szzLogs : CHAR* 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 JetGetLogInfoA "JetGetLogInfoA" sptr, int, sptr
; res = JetGetLogInfoA(varptr(szzLogs), cbMax, varptr(pcbActual))
; szzLogs : CHAR* 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 JetGetLogInfoA(CHAR* szzLogs, DWORD cbMax, DWORD* pcbActual)
#uselib "ESENT.dll"
#cfunc global JetGetLogInfoA "JetGetLogInfoA" var, int, var
; res = JetGetLogInfoA(szzLogs, cbMax, pcbActual)
; szzLogs : CHAR* 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 JetGetLogInfoA(CHAR* szzLogs, DWORD cbMax, DWORD* pcbActual)
#uselib "ESENT.dll"
#cfunc global JetGetLogInfoA "JetGetLogInfoA" intptr, int, intptr
; res = JetGetLogInfoA(varptr(szzLogs), cbMax, varptr(pcbActual))
; szzLogs : CHAR* 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")
	procJetGetLogInfoA = esent.NewProc("JetGetLogInfoA")
)

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

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

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

●JetGetLogInfoA(szzLogs, cbMax, pcbActual) = DLL("ESENT.dll", "int JetGetLogInfoA(void*, dword, void*)")
# 呼び出し: JetGetLogInfoA(szzLogs, cbMax, pcbActual)
# szzLogs : CHAR* 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)。