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JetGetAttachInfoInstanceA

関数
指定インスタンスのアタッチ済みデータベース一覧を取得する(ANSI版)。
DLLESENT.dll文字セットANSI (-A)呼出規約winapi
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シグネチャ

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

INT JetGetAttachInfoInstanceA(
    JET_INSTANCE instance,
    CHAR* szzDatabases,   // optional
    DWORD cbMax,
    DWORD* pcbActual   // optional
);

パラメーター

名前型方向説明
instanceJET_INSTANCEin情報取得対象のインスタンスを識別するJET_INSTANCEハンドル。
szzDatabasesCHAR*outoptionalアタッチ中データベースのパス一覧を受け取る出力ANSI文字列バッファポインタ。NUL区切りの多重文字列となる。
cbMaxDWORDinszzDatabasesバッファのサイズをバイト単位で指定する値。
pcbActualDWORD*outoptional実際に必要/書き込まれたバイト数を受け取る出力ポインタ。

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 JetGetAttachInfoInstanceA(
    JET_INSTANCE instance,
    CHAR* szzDatabases,   // optional
    DWORD cbMax,
    DWORD* pcbActual   // optional
);
[DllImport("ESENT.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern int JetGetAttachInfoInstanceA(
    UIntPtr instance,   // JET_INSTANCE
    IntPtr szzDatabases,   // CHAR* optional, out
    uint cbMax,   // DWORD
    IntPtr pcbActual   // DWORD* optional, out
);
<DllImport("ESENT.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function JetGetAttachInfoInstanceA(
    instance As UIntPtr,   ' JET_INSTANCE
    szzDatabases As IntPtr,   ' CHAR* optional, out
    cbMax As UInteger,   ' DWORD
    pcbActual As IntPtr   ' DWORD* optional, out
) As Integer
End Function
' instance : JET_INSTANCE
' szzDatabases : CHAR* optional, out
' cbMax : DWORD
' pcbActual : DWORD* optional, out
Declare PtrSafe Function JetGetAttachInfoInstanceA Lib "esent" ( _
    ByVal instance As LongPtr, _
    ByVal szzDatabases 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

JetGetAttachInfoInstanceA = ctypes.windll.esent.JetGetAttachInfoInstanceA
JetGetAttachInfoInstanceA.restype = ctypes.c_int
JetGetAttachInfoInstanceA.argtypes = [
    ctypes.c_size_t,  # instance : JET_INSTANCE
    ctypes.POINTER(ctypes.c_byte),  # szzDatabases : 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')
JetGetAttachInfoInstanceA = Fiddle::Function.new(
  lib['JetGetAttachInfoInstanceA'],
  [
    Fiddle::TYPE_UINTPTR_T,  # instance : JET_INSTANCE
    Fiddle::TYPE_VOIDP,  # szzDatabases : CHAR* optional, out
    -Fiddle::TYPE_INT,  # cbMax : DWORD
    Fiddle::TYPE_VOIDP,  # pcbActual : DWORD* optional, out
  ],
  Fiddle::TYPE_INT)
#[link(name = "esent")]
extern "system" {
    fn JetGetAttachInfoInstanceA(
        instance: usize,  // JET_INSTANCE
        szzDatabases: *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 JetGetAttachInfoInstanceA(UIntPtr instance, IntPtr szzDatabases, uint cbMax, IntPtr pcbActual);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetGetAttachInfoInstanceA' -Namespace Win32 -PassThru
# $api::JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual)
#uselib "ESENT.dll"
#func global JetGetAttachInfoInstanceA "JetGetAttachInfoInstanceA" sptr, sptr, sptr, sptr
; JetGetAttachInfoInstanceA instance, varptr(szzDatabases), cbMax, varptr(pcbActual)   ; 戻り値は stat
; instance : JET_INSTANCE -> "sptr"
; szzDatabases : 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 JetGetAttachInfoInstanceA "JetGetAttachInfoInstanceA" sptr, var, int, var
; res = JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual)
; instance : JET_INSTANCE -> "sptr"
; szzDatabases : 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。
出力引数: 
; INT JetGetAttachInfoInstanceA(JET_INSTANCE instance, CHAR* szzDatabases, DWORD cbMax, DWORD* pcbActual)
#uselib "ESENT.dll"
#cfunc global JetGetAttachInfoInstanceA "JetGetAttachInfoInstanceA" intptr, var, int, var
; res = JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual)
; instance : JET_INSTANCE -> "intptr"
; szzDatabases : 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。
import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	esent = windows.NewLazySystemDLL("ESENT.dll")
	procJetGetAttachInfoInstanceA = esent.NewProc("JetGetAttachInfoInstanceA")
)

// instance (JET_INSTANCE), szzDatabases (CHAR* optional, out), cbMax (DWORD), pcbActual (DWORD* optional, out)
r1, _, err := procJetGetAttachInfoInstanceA.Call(
	uintptr(instance),
	uintptr(szzDatabases),
	uintptr(cbMax),
	uintptr(pcbActual),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT
function JetGetAttachInfoInstanceA(
  instance: NativeUInt;   // JET_INSTANCE
  szzDatabases: Pointer;   // CHAR* optional, out
  cbMax: DWORD;   // DWORD
  pcbActual: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'ESENT.dll' name 'JetGetAttachInfoInstanceA';
result := DllCall("ESENT\JetGetAttachInfoInstanceA"
    , "UPtr", instance   ; JET_INSTANCE
    , "Ptr", szzDatabases   ; CHAR* optional, out
    , "UInt", cbMax   ; DWORD
    , "Ptr", pcbActual   ; DWORD* optional, out
    , "Int")   ; return: INT
●JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual) = DLL("ESENT.dll", "int JetGetAttachInfoInstanceA(int, void*, dword, void*)")
# 呼び出し: JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual)
# instance : JET_INSTANCE -> "int"
# szzDatabases : 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)。
const std = @import("std");

extern "esent" fn JetGetAttachInfoInstanceA(
    instance: usize, // JET_INSTANCE
    szzDatabases: [*c]i8, // CHAR* optional, out
    cbMax: u32, // DWORD
    pcbActual: [*c]u32 // DWORD* optional, out
) callconv(std.os.windows.WINAPI) i32;
proc JetGetAttachInfoInstanceA(
    instance: uint,  # JET_INSTANCE
    szzDatabases: ptr int8,  # CHAR* optional, out
    cbMax: uint32,  # DWORD
    pcbActual: ptr uint32  # DWORD* optional, out
): int32 {.importc: "JetGetAttachInfoInstanceA", stdcall, dynlib: "ESENT.dll".}
pragma(lib, "esent");
extern(Windows)
int JetGetAttachInfoInstanceA(
    size_t instance,   // JET_INSTANCE
    byte* szzDatabases,   // CHAR* optional, out
    uint cbMax,   // DWORD
    uint* pcbActual   // DWORD* optional, out
);
ccall((:JetGetAttachInfoInstanceA, "ESENT.dll"), stdcall, Int32,
      (Csize_t, Ptr{Int8}, UInt32, Ptr{UInt32}),
      instance, szzDatabases, cbMax, pcbActual)
# instance : JET_INSTANCE -> Csize_t
# szzDatabases : CHAR* optional, out -> Ptr{Int8}
# cbMax : DWORD -> UInt32
# pcbActual : DWORD* optional, out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int32_t JetGetAttachInfoInstanceA(
    uintptr_t instance,
    int8_t* szzDatabases,
    uint32_t cbMax,
    uint32_t* pcbActual);
]]
local esent = ffi.load("esent")
-- esent.JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual)
-- instance : JET_INSTANCE
-- szzDatabases : CHAR* optional, out
-- cbMax : DWORD
-- pcbActual : DWORD* optional, out
-- 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 JetGetAttachInfoInstanceA = lib.func('__stdcall', 'JetGetAttachInfoInstanceA', 'int32_t', ['uintptr_t', 'int8_t *', 'uint32_t', 'uint32_t *']);
// JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual)
// instance : JET_INSTANCE -> 'uintptr_t'
// szzDatabases : CHAR* optional, out -> 'int8_t *'
// cbMax : DWORD -> 'uint32_t'
// pcbActual : DWORD* optional, out -> 'uint32_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。
const lib = Deno.dlopen("ESENT.dll", {
  JetGetAttachInfoInstanceA: { parameters: ["usize", "pointer", "u32", "pointer"], result: "i32" },
});
// lib.symbols.JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual)
// instance : JET_INSTANCE -> "usize"
// szzDatabases : CHAR* optional, out -> "pointer"
// cbMax : DWORD -> "u32"
// pcbActual : DWORD* optional, out -> "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 JetGetAttachInfoInstanceA(
    size_t instance,
    int8_t* szzDatabases,
    uint32_t cbMax,
    uint32_t* pcbActual);
C, "ESENT.dll");
// $ffi->JetGetAttachInfoInstanceA(instance, szzDatabases, cbMax, pcbActual);
// instance : JET_INSTANCE
// szzDatabases : CHAR* optional, out
// cbMax : DWORD
// pcbActual : DWORD* optional, out
// 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 JetGetAttachInfoInstanceA(
        long instance,   // JET_INSTANCE
        byte[] szzDatabases,   // CHAR* optional, out
        int cbMax,   // DWORD
        IntByReference pcbActual   // DWORD* optional, out
    );
}
@[Link("esent")]
lib LibESENT
  fun JetGetAttachInfoInstanceA = JetGetAttachInfoInstanceA(
    instance : LibC::SizeT,   # JET_INSTANCE
    szzDatabases : Int8*,   # CHAR* optional, out
    cbMax : UInt32,   # DWORD
    pcbActual : UInt32*   # DWORD* optional, out
  ) : 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 JetGetAttachInfoInstanceANative = Int32 Function(UintPtr, Pointer<Int8>, Uint32, Pointer<Uint32>);
typedef JetGetAttachInfoInstanceADart = int Function(int, Pointer<Int8>, int, Pointer<Uint32>);
final JetGetAttachInfoInstanceA = DynamicLibrary.open('ESENT.dll')
    .lookupFunction<JetGetAttachInfoInstanceANative, JetGetAttachInfoInstanceADart>('JetGetAttachInfoInstanceA');
// instance : JET_INSTANCE -> UintPtr
// szzDatabases : CHAR* optional, out -> Pointer<Int8>
// cbMax : DWORD -> Uint32
// pcbActual : DWORD* optional, out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function JetGetAttachInfoInstanceA(
  instance: NativeUInt;   // JET_INSTANCE
  szzDatabases: Pointer;   // CHAR* optional, out
  cbMax: DWORD;   // DWORD
  pcbActual: Pointer   // DWORD* optional, out
): Integer; stdcall;
  external 'ESENT.dll' name 'JetGetAttachInfoInstanceA';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "JetGetAttachInfoInstanceA"
  c_JetGetAttachInfoInstanceA :: CUIntPtr -> Ptr Int8 -> Word32 -> Ptr Word32 -> IO Int32
-- instance : JET_INSTANCE -> CUIntPtr
-- szzDatabases : CHAR* optional, out -> Ptr Int8
-- cbMax : DWORD -> Word32
-- pcbActual : DWORD* optional, out -> Ptr Word32
-- 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 jetgetattachinfoinstancea =
  foreign "JetGetAttachInfoInstanceA"
    (size_t @-> (ptr int8_t) @-> uint32_t @-> (ptr uint32_t) @-> returning int32_t)
(* instance : JET_INSTANCE -> size_t *)
(* szzDatabases : CHAR* optional, out -> (ptr int8_t) *)
(* cbMax : DWORD -> uint32_t *)
(* pcbActual : DWORD* optional, out -> (ptr uint32_t) *)
(* 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 ("JetGetAttachInfoInstanceA" jet-get-attach-info-instance-a :convention :stdcall) :int32
  (instance :uint64)   ; JET_INSTANCE
  (szz-databases :pointer)   ; CHAR* optional, out
  (cb-max :uint32)   ; DWORD
  (pcb-actual :pointer))   ; DWORD* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $JetGetAttachInfoInstanceA = Win32::API::More->new('ESENT',
    'int JetGetAttachInfoInstanceA(WPARAM instance, LPVOID szzDatabases, DWORD cbMax, LPVOID pcbActual)');
# my $ret = $JetGetAttachInfoInstanceA->Call($instance, $szzDatabases, $cbMax, $pcbActual);
# instance : JET_INSTANCE -> WPARAM
# szzDatabases : CHAR* optional, out -> LPVOID
# cbMax : DWORD -> DWORD
# pcbActual : DWORD* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

関連項目

文字セット違い