JetExternalRestoreA

関数

ログ世代を指定して外部バックアップから復元する(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 JetExternalRestoreA(
    CHAR* szCheckpointFilePath,
    CHAR* szLogPath,
    JET_RSTMAP_A* rgrstmap,   // optional
    INT crstfilemap,
    CHAR* szBackupLogPath,
    INT genLow,
    INT genHigh,
    JET_PFNSTATUS pfn
);

パラメーター

名前	型	方向	説明
szCheckpointFilePath	CHAR*	in	復元時に使用するチェックポイントファイルのパスを指す終端付きANSI文字列ポインタ。
szLogPath	CHAR*	in	復元に使用するログファイルが格納されたディレクトリのパスを指す終端付きANSI文字列ポインタ。
rgrstmap	JET_RSTMAP_A*	inoptional	バックアップ元と復元先のデータベースパス対応を保持するJET_RSTMAP_A配列のポインタ。
crstfilemap	INT	in	rgrstmap配列の要素数を指定する値。
szBackupLogPath	CHAR*	in	バックアップ時のログが格納されたディレクトリのパスを指す終端付きANSI文字列ポインタ。
genLow	INT	in	復元に適用するログ世代の下限番号を指定する値。
genHigh	INT	in	復元に適用するログ世代の上限番号を指定する値。
pfn	JET_PFNSTATUS	in	進捗通知を受け取るステータスコールバック関数(JET_PFNSTATUS)。NULL可。

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 JetExternalRestoreA(
    CHAR* szCheckpointFilePath,
    CHAR* szLogPath,
    JET_RSTMAP_A* rgrstmap,   // optional
    INT crstfilemap,
    CHAR* szBackupLogPath,
    INT genLow,
    INT genHigh,
    JET_PFNSTATUS pfn
);

[DllImport("ESENT.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern int JetExternalRestoreA(
    IntPtr szCheckpointFilePath,   // CHAR*
    IntPtr szLogPath,   // CHAR*
    IntPtr rgrstmap,   // JET_RSTMAP_A* optional
    int crstfilemap,   // INT
    IntPtr szBackupLogPath,   // CHAR*
    int genLow,   // INT
    int genHigh,   // INT
    IntPtr pfn   // JET_PFNSTATUS
);

<DllImport("ESENT.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function JetExternalRestoreA(
    szCheckpointFilePath As IntPtr,   ' CHAR*
    szLogPath As IntPtr,   ' CHAR*
    rgrstmap As IntPtr,   ' JET_RSTMAP_A* optional
    crstfilemap As Integer,   ' INT
    szBackupLogPath As IntPtr,   ' CHAR*
    genLow As Integer,   ' INT
    genHigh As Integer,   ' INT
    pfn As IntPtr   ' JET_PFNSTATUS
) As Integer
End Function

' szCheckpointFilePath : CHAR*
' szLogPath : CHAR*
' rgrstmap : JET_RSTMAP_A* optional
' crstfilemap : INT
' szBackupLogPath : CHAR*
' genLow : INT
' genHigh : INT
' pfn : JET_PFNSTATUS
Declare PtrSafe Function JetExternalRestoreA Lib "esent" ( _
    ByVal szCheckpointFilePath As LongPtr, _
    ByVal szLogPath As LongPtr, _
    ByVal rgrstmap As LongPtr, _
    ByVal crstfilemap As Long, _
    ByVal szBackupLogPath As LongPtr, _
    ByVal genLow As Long, _
    ByVal genHigh As Long, _
    ByVal pfn 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

JetExternalRestoreA = ctypes.windll.esent.JetExternalRestoreA
JetExternalRestoreA.restype = ctypes.c_int
JetExternalRestoreA.argtypes = [
    ctypes.POINTER(ctypes.c_byte),  # szCheckpointFilePath : CHAR*
    ctypes.POINTER(ctypes.c_byte),  # szLogPath : CHAR*
    ctypes.c_void_p,  # rgrstmap : JET_RSTMAP_A* optional
    ctypes.c_int,  # crstfilemap : INT
    ctypes.POINTER(ctypes.c_byte),  # szBackupLogPath : CHAR*
    ctypes.c_int,  # genLow : INT
    ctypes.c_int,  # genHigh : INT
    ctypes.c_void_p,  # pfn : JET_PFNSTATUS
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetExternalRestoreA = Fiddle::Function.new(
  lib['JetExternalRestoreA'],
  [
    Fiddle::TYPE_VOIDP,  # szCheckpointFilePath : CHAR*
    Fiddle::TYPE_VOIDP,  # szLogPath : CHAR*
    Fiddle::TYPE_VOIDP,  # rgrstmap : JET_RSTMAP_A* optional
    Fiddle::TYPE_INT,  # crstfilemap : INT
    Fiddle::TYPE_VOIDP,  # szBackupLogPath : CHAR*
    Fiddle::TYPE_INT,  # genLow : INT
    Fiddle::TYPE_INT,  # genHigh : INT
    Fiddle::TYPE_VOIDP,  # pfn : JET_PFNSTATUS
  ],
  Fiddle::TYPE_INT)

#[link(name = "esent")]
extern "system" {
    fn JetExternalRestoreA(
        szCheckpointFilePath: *mut i8,  // CHAR*
        szLogPath: *mut i8,  // CHAR*
        rgrstmap: *mut JET_RSTMAP_A,  // JET_RSTMAP_A* optional
        crstfilemap: i32,  // INT
        szBackupLogPath: *mut i8,  // CHAR*
        genLow: i32,  // INT
        genHigh: i32,  // INT
        pfn: *const core::ffi::c_void  // JET_PFNSTATUS
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ESENT.dll", CharSet = CharSet.Ansi)]
public static extern int JetExternalRestoreA(IntPtr szCheckpointFilePath, IntPtr szLogPath, IntPtr rgrstmap, int crstfilemap, IntPtr szBackupLogPath, int genLow, int genHigh, IntPtr pfn);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetExternalRestoreA' -Namespace Win32 -PassThru
# $api::JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)

#uselib "ESENT.dll"
#func global JetExternalRestoreA "JetExternalRestoreA" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; JetExternalRestoreA varptr(szCheckpointFilePath), varptr(szLogPath), varptr(rgrstmap), crstfilemap, varptr(szBackupLogPath), genLow, genHigh, pfn   ; 戻り値は stat
; szCheckpointFilePath : CHAR* -> "sptr"
; szLogPath : CHAR* -> "sptr"
; rgrstmap : JET_RSTMAP_A* optional -> "sptr"
; crstfilemap : INT -> "sptr"
; szBackupLogPath : CHAR* -> "sptr"
; genLow : INT -> "sptr"
; genHigh : INT -> "sptr"
; pfn : JET_PFNSTATUS -> "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 JetExternalRestoreA "JetExternalRestoreA" var, var, var, int, var, int, int, sptr
; res = JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)
; szCheckpointFilePath : CHAR* -> "var"
; szLogPath : CHAR* -> "var"
; rgrstmap : JET_RSTMAP_A* optional -> "var"
; crstfilemap : INT -> "int"
; szBackupLogPath : CHAR* -> "var"
; genLow : INT -> "int"
; genHigh : INT -> "int"
; pfn : JET_PFNSTATUS -> "sptr"
; ※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 JetExternalRestoreA "JetExternalRestoreA" sptr, sptr, sptr, int, sptr, int, int, sptr
; res = JetExternalRestoreA(varptr(szCheckpointFilePath), varptr(szLogPath), varptr(rgrstmap), crstfilemap, varptr(szBackupLogPath), genLow, genHigh, pfn)
; szCheckpointFilePath : CHAR* -> "sptr"
; szLogPath : CHAR* -> "sptr"
; rgrstmap : JET_RSTMAP_A* optional -> "sptr"
; crstfilemap : INT -> "int"
; szBackupLogPath : CHAR* -> "sptr"
; genLow : INT -> "int"
; genHigh : INT -> "int"
; pfn : JET_PFNSTATUS -> "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 JetExternalRestoreA(CHAR* szCheckpointFilePath, CHAR* szLogPath, JET_RSTMAP_A* rgrstmap, INT crstfilemap, CHAR* szBackupLogPath, INT genLow, INT genHigh, JET_PFNSTATUS pfn)
#uselib "ESENT.dll"
#cfunc global JetExternalRestoreA "JetExternalRestoreA" var, var, var, int, var, int, int, intptr
; res = JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)
; szCheckpointFilePath : CHAR* -> "var"
; szLogPath : CHAR* -> "var"
; rgrstmap : JET_RSTMAP_A* optional -> "var"
; crstfilemap : INT -> "int"
; szBackupLogPath : CHAR* -> "var"
; genLow : INT -> "int"
; genHigh : INT -> "int"
; pfn : JET_PFNSTATUS -> "intptr"
; ※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 JetExternalRestoreA(CHAR* szCheckpointFilePath, CHAR* szLogPath, JET_RSTMAP_A* rgrstmap, INT crstfilemap, CHAR* szBackupLogPath, INT genLow, INT genHigh, JET_PFNSTATUS pfn)
#uselib "ESENT.dll"
#cfunc global JetExternalRestoreA "JetExternalRestoreA" intptr, intptr, intptr, int, intptr, int, int, intptr
; res = JetExternalRestoreA(varptr(szCheckpointFilePath), varptr(szLogPath), varptr(rgrstmap), crstfilemap, varptr(szBackupLogPath), genLow, genHigh, pfn)
; szCheckpointFilePath : CHAR* -> "intptr"
; szLogPath : CHAR* -> "intptr"
; rgrstmap : JET_RSTMAP_A* optional -> "intptr"
; crstfilemap : INT -> "int"
; szBackupLogPath : CHAR* -> "intptr"
; genLow : INT -> "int"
; genHigh : INT -> "int"
; pfn : JET_PFNSTATUS -> "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")
	procJetExternalRestoreA = esent.NewProc("JetExternalRestoreA")
)

// szCheckpointFilePath (CHAR*), szLogPath (CHAR*), rgrstmap (JET_RSTMAP_A* optional), crstfilemap (INT), szBackupLogPath (CHAR*), genLow (INT), genHigh (INT), pfn (JET_PFNSTATUS)
r1, _, err := procJetExternalRestoreA.Call(
	uintptr(szCheckpointFilePath),
	uintptr(szLogPath),
	uintptr(rgrstmap),
	uintptr(crstfilemap),
	uintptr(szBackupLogPath),
	uintptr(genLow),
	uintptr(genHigh),
	uintptr(pfn),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function JetExternalRestoreA(
  szCheckpointFilePath: Pointer;   // CHAR*
  szLogPath: Pointer;   // CHAR*
  rgrstmap: Pointer;   // JET_RSTMAP_A* optional
  crstfilemap: Integer;   // INT
  szBackupLogPath: Pointer;   // CHAR*
  genLow: Integer;   // INT
  genHigh: Integer;   // INT
  pfn: Pointer   // JET_PFNSTATUS
): Integer; stdcall;
  external 'ESENT.dll' name 'JetExternalRestoreA';

result := DllCall("ESENT\JetExternalRestoreA"
    , "Ptr", szCheckpointFilePath   ; CHAR*
    , "Ptr", szLogPath   ; CHAR*
    , "Ptr", rgrstmap   ; JET_RSTMAP_A* optional
    , "Int", crstfilemap   ; INT
    , "Ptr", szBackupLogPath   ; CHAR*
    , "Int", genLow   ; INT
    , "Int", genHigh   ; INT
    , "Ptr", pfn   ; JET_PFNSTATUS
    , "Int")   ; return: INT

●JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn) = DLL("ESENT.dll", "int JetExternalRestoreA(void*, void*, void*, int, void*, int, int, void*)")
# 呼び出し: JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)
# szCheckpointFilePath : CHAR* -> "void*"
# szLogPath : CHAR* -> "void*"
# rgrstmap : JET_RSTMAP_A* optional -> "void*"
# crstfilemap : INT -> "int"
# szBackupLogPath : CHAR* -> "void*"
# genLow : INT -> "int"
# genHigh : INT -> "int"
# pfn : JET_PFNSTATUS -> "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)。

const std = @import("std");

extern "esent" fn JetExternalRestoreA(
    szCheckpointFilePath: [*c]i8, // CHAR*
    szLogPath: [*c]i8, // CHAR*
    rgrstmap: [*c]JET_RSTMAP_A, // JET_RSTMAP_A* optional
    crstfilemap: i32, // INT
    szBackupLogPath: [*c]i8, // CHAR*
    genLow: i32, // INT
    genHigh: i32, // INT
    pfn: ?*anyopaque // JET_PFNSTATUS
) callconv(std.os.windows.WINAPI) i32;

proc JetExternalRestoreA(
    szCheckpointFilePath: ptr int8,  # CHAR*
    szLogPath: ptr int8,  # CHAR*
    rgrstmap: ptr JET_RSTMAP_A,  # JET_RSTMAP_A* optional
    crstfilemap: int32,  # INT
    szBackupLogPath: ptr int8,  # CHAR*
    genLow: int32,  # INT
    genHigh: int32,  # INT
    pfn: pointer  # JET_PFNSTATUS
): int32 {.importc: "JetExternalRestoreA", stdcall, dynlib: "ESENT.dll".}

pragma(lib, "esent");
extern(Windows)
int JetExternalRestoreA(
    byte* szCheckpointFilePath,   // CHAR*
    byte* szLogPath,   // CHAR*
    JET_RSTMAP_A* rgrstmap,   // JET_RSTMAP_A* optional
    int crstfilemap,   // INT
    byte* szBackupLogPath,   // CHAR*
    int genLow,   // INT
    int genHigh,   // INT
    void* pfn   // JET_PFNSTATUS
);

ccall((:JetExternalRestoreA, "ESENT.dll"), stdcall, Int32,
      (Ptr{Int8}, Ptr{Int8}, Ptr{JET_RSTMAP_A}, Int32, Ptr{Int8}, Int32, Int32, Ptr{Cvoid}),
      szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)
# szCheckpointFilePath : CHAR* -> Ptr{Int8}
# szLogPath : CHAR* -> Ptr{Int8}
# rgrstmap : JET_RSTMAP_A* optional -> Ptr{JET_RSTMAP_A}
# crstfilemap : INT -> Int32
# szBackupLogPath : CHAR* -> Ptr{Int8}
# genLow : INT -> Int32
# genHigh : INT -> Int32
# pfn : JET_PFNSTATUS -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t JetExternalRestoreA(
    int8_t* szCheckpointFilePath,
    int8_t* szLogPath,
    void* rgrstmap,
    int32_t crstfilemap,
    int8_t* szBackupLogPath,
    int32_t genLow,
    int32_t genHigh,
    void* pfn);
]]
local esent = ffi.load("esent")
-- esent.JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)
-- szCheckpointFilePath : CHAR*
-- szLogPath : CHAR*
-- rgrstmap : JET_RSTMAP_A* optional
-- crstfilemap : INT
-- szBackupLogPath : CHAR*
-- genLow : INT
-- genHigh : INT
-- pfn : JET_PFNSTATUS
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('ESENT.dll');
const JetExternalRestoreA = lib.func('__stdcall', 'JetExternalRestoreA', 'int32_t', ['int8_t *', 'int8_t *', 'void *', 'int32_t', 'int8_t *', 'int32_t', 'int32_t', 'void *']);
// JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)
// szCheckpointFilePath : CHAR* -> 'int8_t *'
// szLogPath : CHAR* -> 'int8_t *'
// rgrstmap : JET_RSTMAP_A* optional -> 'void *'
// crstfilemap : INT -> 'int32_t'
// szBackupLogPath : CHAR* -> 'int8_t *'
// genLow : INT -> 'int32_t'
// genHigh : INT -> 'int32_t'
// pfn : JET_PFNSTATUS -> 'void *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。
// コールバック(関数ポインタ)は koffi.proto/koffi.register で型を定義して渡す(素の void* では JS 関数を渡せない)。

const lib = Deno.dlopen("ESENT.dll", {
  JetExternalRestoreA: { parameters: ["pointer", "pointer", "pointer", "i32", "pointer", "i32", "i32", "pointer"], result: "i32" },
});
// lib.symbols.JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn)
// szCheckpointFilePath : CHAR* -> "pointer"
// szLogPath : CHAR* -> "pointer"
// rgrstmap : JET_RSTMAP_A* optional -> "pointer"
// crstfilemap : INT -> "i32"
// szBackupLogPath : CHAR* -> "pointer"
// genLow : INT -> "i32"
// genHigh : INT -> "i32"
// pfn : JET_PFNSTATUS -> "pointer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t JetExternalRestoreA(
    int8_t* szCheckpointFilePath,
    int8_t* szLogPath,
    void* rgrstmap,
    int32_t crstfilemap,
    int8_t* szBackupLogPath,
    int32_t genLow,
    int32_t genHigh,
    void* pfn);
C, "ESENT.dll");
// $ffi->JetExternalRestoreA(szCheckpointFilePath, szLogPath, rgrstmap, crstfilemap, szBackupLogPath, genLow, genHigh, pfn);
// szCheckpointFilePath : CHAR*
// szLogPath : CHAR*
// rgrstmap : JET_RSTMAP_A* optional
// crstfilemap : INT
// szBackupLogPath : CHAR*
// genLow : INT
// genHigh : INT
// pfn : JET_PFNSTATUS
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Esent extends StdCallLibrary {
    Esent INSTANCE = Native.load("esent", Esent.class, W32APIOptions.ASCII_OPTIONS);
    int JetExternalRestoreA(
        byte[] szCheckpointFilePath,   // CHAR*
        byte[] szLogPath,   // CHAR*
        Pointer rgrstmap,   // JET_RSTMAP_A* optional
        int crstfilemap,   // INT
        byte[] szBackupLogPath,   // CHAR*
        int genLow,   // INT
        int genHigh,   // INT
        Callback pfn   // JET_PFNSTATUS
    );
}

@[Link("esent")]
lib LibESENT
  fun JetExternalRestoreA = JetExternalRestoreA(
    szCheckpointFilePath : Int8*,   # CHAR*
    szLogPath : Int8*,   # CHAR*
    rgrstmap : JET_RSTMAP_A*,   # JET_RSTMAP_A* optional
    crstfilemap : Int32,   # INT
    szBackupLogPath : Int8*,   # CHAR*
    genLow : Int32,   # INT
    genHigh : Int32,   # INT
    pfn : Void*   # JET_PFNSTATUS
  ) : Int32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef JetExternalRestoreANative = Int32 Function(Pointer<Int8>, Pointer<Int8>, Pointer<Void>, Int32, Pointer<Int8>, Int32, Int32, Pointer<Void>);
typedef JetExternalRestoreADart = int Function(Pointer<Int8>, Pointer<Int8>, Pointer<Void>, int, Pointer<Int8>, int, int, Pointer<Void>);
final JetExternalRestoreA = DynamicLibrary.open('ESENT.dll')
    .lookupFunction<JetExternalRestoreANative, JetExternalRestoreADart>('JetExternalRestoreA');
// szCheckpointFilePath : CHAR* -> Pointer<Int8>
// szLogPath : CHAR* -> Pointer<Int8>
// rgrstmap : JET_RSTMAP_A* optional -> Pointer<Void>
// crstfilemap : INT -> Int32
// szBackupLogPath : CHAR* -> Pointer<Int8>
// genLow : INT -> Int32
// genHigh : INT -> Int32
// pfn : JET_PFNSTATUS -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function JetExternalRestoreA(
  szCheckpointFilePath: Pointer;   // CHAR*
  szLogPath: Pointer;   // CHAR*
  rgrstmap: Pointer;   // JET_RSTMAP_A* optional
  crstfilemap: Integer;   // INT
  szBackupLogPath: Pointer;   // CHAR*
  genLow: Integer;   // INT
  genHigh: Integer;   // INT
  pfn: Pointer   // JET_PFNSTATUS
): Integer; stdcall;
  external 'ESENT.dll' name 'JetExternalRestoreA';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "JetExternalRestoreA"
  c_JetExternalRestoreA :: Ptr Int8 -> Ptr Int8 -> Ptr () -> Int32 -> Ptr Int8 -> Int32 -> Int32 -> Ptr () -> IO Int32
-- szCheckpointFilePath : CHAR* -> Ptr Int8
-- szLogPath : CHAR* -> Ptr Int8
-- rgrstmap : JET_RSTMAP_A* optional -> Ptr ()
-- crstfilemap : INT -> Int32
-- szBackupLogPath : CHAR* -> Ptr Int8
-- genLow : INT -> Int32
-- genHigh : INT -> Int32
-- pfn : JET_PFNSTATUS -> Ptr ()
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let jetexternalrestorea =
  foreign "JetExternalRestoreA"
    ((ptr int8_t) @-> (ptr int8_t) @-> (ptr void) @-> int32_t @-> (ptr int8_t) @-> int32_t @-> int32_t @-> (ptr void) @-> returning int32_t)
(* szCheckpointFilePath : CHAR* -> (ptr int8_t) *)
(* szLogPath : CHAR* -> (ptr int8_t) *)
(* rgrstmap : JET_RSTMAP_A* optional -> (ptr void) *)
(* crstfilemap : INT -> int32_t *)
(* szBackupLogPath : CHAR* -> (ptr int8_t) *)
(* genLow : INT -> int32_t *)
(* genHigh : INT -> int32_t *)
(* pfn : JET_PFNSTATUS -> (ptr void) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library esent (t "ESENT.dll"))
(cffi:use-foreign-library esent)

(cffi:defcfun ("JetExternalRestoreA" jet-external-restore-a :convention :stdcall) :int32
  (sz-checkpoint-file-path :pointer)   ; CHAR*
  (sz-log-path :pointer)   ; CHAR*
  (rgrstmap :pointer)   ; JET_RSTMAP_A* optional
  (crstfilemap :int32)   ; INT
  (sz-backup-log-path :pointer)   ; CHAR*
  (gen-low :int32)   ; INT
  (gen-high :int32)   ; INT
  (pfn :pointer))   ; JET_PFNSTATUS
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $JetExternalRestoreA = Win32::API::More->new('ESENT',
    'int JetExternalRestoreA(LPVOID szCheckpointFilePath, LPVOID szLogPath, LPVOID rgrstmap, int crstfilemap, LPVOID szBackupLogPath, int genLow, int genHigh, LPVOID pfn)');
# my $ret = $JetExternalRestoreA->Call($szCheckpointFilePath, $szLogPath, $rgrstmap, $crstfilemap, $szBackupLogPath, $genLow, $genHigh, $pfn);
# szCheckpointFilePath : CHAR* -> LPVOID
# szLogPath : CHAR* -> LPVOID
# rgrstmap : JET_RSTMAP_A* optional -> LPVOID
# crstfilemap : INT -> int
# szBackupLogPath : CHAR* -> LPVOID
# genLow : INT -> int
# genHigh : INT -> int
# pfn : JET_PFNSTATUS -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。
# コールバック(関数ポインタ)は Perl sub を直接渡せません。Win32::API::Callback を使用してください。

JetExternalRestoreA

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