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JetGetDatabaseFileInfoA

関数
データベースファイルから情報を取得する(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 JetGetDatabaseFileInfoA(
    CHAR* szDatabaseName,
    void* pvResult,
    DWORD cbMax,
    DWORD InfoLevel
);

パラメーター

名前型方向説明
szDatabaseNameCHAR*in情報取得対象のデータベースファイルのパスを指す終端付きANSI文字列ポインタ。
pvResultvoid*out取得した情報を受け取る出力バッファのポインタ。InfoLevelに応じた型で格納される。
cbMaxDWORDinpvResultバッファのサイズをバイト単位で指定する値。
InfoLevelDWORDin取得する情報の種類を指定する列挙値。ページサイズやバージョン等を選択する。

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 JetGetDatabaseFileInfoA(
    CHAR* szDatabaseName,
    void* pvResult,
    DWORD cbMax,
    DWORD InfoLevel
);
[DllImport("ESENT.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern int JetGetDatabaseFileInfoA(
    IntPtr szDatabaseName,   // CHAR*
    IntPtr pvResult,   // void* out
    uint cbMax,   // DWORD
    uint InfoLevel   // DWORD
);
<DllImport("ESENT.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function JetGetDatabaseFileInfoA(
    szDatabaseName As IntPtr,   ' CHAR*
    pvResult As IntPtr,   ' void* out
    cbMax As UInteger,   ' DWORD
    InfoLevel As UInteger   ' DWORD
) As Integer
End Function
' szDatabaseName : CHAR*
' pvResult : void* out
' cbMax : DWORD
' InfoLevel : DWORD
Declare PtrSafe Function JetGetDatabaseFileInfoA Lib "esent" ( _
    ByVal szDatabaseName As LongPtr, _
    ByVal pvResult As LongPtr, _
    ByVal cbMax As Long, _
    ByVal InfoLevel As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。
import ctypes
from ctypes import wintypes

JetGetDatabaseFileInfoA = ctypes.windll.esent.JetGetDatabaseFileInfoA
JetGetDatabaseFileInfoA.restype = ctypes.c_int
JetGetDatabaseFileInfoA.argtypes = [
    ctypes.POINTER(ctypes.c_byte),  # szDatabaseName : CHAR*
    ctypes.POINTER(None),  # pvResult : void* out
    wintypes.DWORD,  # cbMax : DWORD
    wintypes.DWORD,  # InfoLevel : DWORD
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ESENT.dll')
JetGetDatabaseFileInfoA = Fiddle::Function.new(
  lib['JetGetDatabaseFileInfoA'],
  [
    Fiddle::TYPE_VOIDP,  # szDatabaseName : CHAR*
    Fiddle::TYPE_VOIDP,  # pvResult : void* out
    -Fiddle::TYPE_INT,  # cbMax : DWORD
    -Fiddle::TYPE_INT,  # InfoLevel : DWORD
  ],
  Fiddle::TYPE_INT)
#[link(name = "esent")]
extern "system" {
    fn JetGetDatabaseFileInfoA(
        szDatabaseName: *mut i8,  // CHAR*
        pvResult: *mut (),  // void* out
        cbMax: u32,  // DWORD
        InfoLevel: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("ESENT.dll", CharSet = CharSet.Ansi)]
public static extern int JetGetDatabaseFileInfoA(IntPtr szDatabaseName, IntPtr pvResult, uint cbMax, uint InfoLevel);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ESENT_JetGetDatabaseFileInfoA' -Namespace Win32 -PassThru
# $api::JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel)
#uselib "ESENT.dll"
#func global JetGetDatabaseFileInfoA "JetGetDatabaseFileInfoA" sptr, sptr, sptr, sptr
; JetGetDatabaseFileInfoA varptr(szDatabaseName), pvResult, cbMax, InfoLevel   ; 戻り値は stat
; szDatabaseName : CHAR* -> "sptr"
; pvResult : void* out -> "sptr"
; cbMax : DWORD -> "sptr"
; InfoLevel : DWORD -> "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 JetGetDatabaseFileInfoA "JetGetDatabaseFileInfoA" var, sptr, int, int
; res = JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel)
; szDatabaseName : CHAR* -> "var"
; pvResult : void* out -> "sptr"
; cbMax : DWORD -> "int"
; InfoLevel : DWORD -> "int"
; ※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 JetGetDatabaseFileInfoA(CHAR* szDatabaseName, void* pvResult, DWORD cbMax, DWORD InfoLevel)
#uselib "ESENT.dll"
#cfunc global JetGetDatabaseFileInfoA "JetGetDatabaseFileInfoA" var, intptr, int, int
; res = JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel)
; szDatabaseName : CHAR* -> "var"
; pvResult : void* out -> "intptr"
; cbMax : DWORD -> "int"
; InfoLevel : DWORD -> "int"
; ※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")
	procJetGetDatabaseFileInfoA = esent.NewProc("JetGetDatabaseFileInfoA")
)

// szDatabaseName (CHAR*), pvResult (void* out), cbMax (DWORD), InfoLevel (DWORD)
r1, _, err := procJetGetDatabaseFileInfoA.Call(
	uintptr(szDatabaseName),
	uintptr(pvResult),
	uintptr(cbMax),
	uintptr(InfoLevel),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT
function JetGetDatabaseFileInfoA(
  szDatabaseName: Pointer;   // CHAR*
  pvResult: Pointer;   // void* out
  cbMax: DWORD;   // DWORD
  InfoLevel: DWORD   // DWORD
): Integer; stdcall;
  external 'ESENT.dll' name 'JetGetDatabaseFileInfoA';
result := DllCall("ESENT\JetGetDatabaseFileInfoA"
    , "Ptr", szDatabaseName   ; CHAR*
    , "Ptr", pvResult   ; void* out
    , "UInt", cbMax   ; DWORD
    , "UInt", InfoLevel   ; DWORD
    , "Int")   ; return: INT
●JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel) = DLL("ESENT.dll", "int JetGetDatabaseFileInfoA(void*, void*, dword, dword)")
# 呼び出し: JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel)
# szDatabaseName : CHAR* -> "void*"
# pvResult : void* out -> "void*"
# cbMax : DWORD -> "dword"
# InfoLevel : DWORD -> "dword"
# 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 JetGetDatabaseFileInfoA(
    szDatabaseName: [*c]i8, // CHAR*
    pvResult: ?*anyopaque, // void* out
    cbMax: u32, // DWORD
    InfoLevel: u32 // DWORD
) callconv(std.os.windows.WINAPI) i32;
proc JetGetDatabaseFileInfoA(
    szDatabaseName: ptr int8,  # CHAR*
    pvResult: pointer,  # void* out
    cbMax: uint32,  # DWORD
    InfoLevel: uint32  # DWORD
): int32 {.importc: "JetGetDatabaseFileInfoA", stdcall, dynlib: "ESENT.dll".}
pragma(lib, "esent");
extern(Windows)
int JetGetDatabaseFileInfoA(
    byte* szDatabaseName,   // CHAR*
    void* pvResult,   // void* out
    uint cbMax,   // DWORD
    uint InfoLevel   // DWORD
);
ccall((:JetGetDatabaseFileInfoA, "ESENT.dll"), stdcall, Int32,
      (Ptr{Int8}, Ptr{Cvoid}, UInt32, UInt32),
      szDatabaseName, pvResult, cbMax, InfoLevel)
# szDatabaseName : CHAR* -> Ptr{Int8}
# pvResult : void* out -> Ptr{Cvoid}
# cbMax : DWORD -> UInt32
# InfoLevel : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int32_t JetGetDatabaseFileInfoA(
    int8_t* szDatabaseName,
    void* pvResult,
    uint32_t cbMax,
    uint32_t InfoLevel);
]]
local esent = ffi.load("esent")
-- esent.JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel)
-- szDatabaseName : CHAR*
-- pvResult : void* out
-- cbMax : DWORD
-- InfoLevel : DWORD
-- 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 JetGetDatabaseFileInfoA = lib.func('__stdcall', 'JetGetDatabaseFileInfoA', 'int32_t', ['int8_t *', 'void *', 'uint32_t', 'uint32_t']);
// JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel)
// szDatabaseName : CHAR* -> 'int8_t *'
// pvResult : void* out -> 'void *'
// cbMax : DWORD -> 'uint32_t'
// InfoLevel : DWORD -> '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", {
  JetGetDatabaseFileInfoA: { parameters: ["pointer", "pointer", "u32", "u32"], result: "i32" },
});
// lib.symbols.JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel)
// szDatabaseName : CHAR* -> "pointer"
// pvResult : void* out -> "pointer"
// cbMax : DWORD -> "u32"
// InfoLevel : DWORD -> "u32"
// 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 JetGetDatabaseFileInfoA(
    int8_t* szDatabaseName,
    void* pvResult,
    uint32_t cbMax,
    uint32_t InfoLevel);
C, "ESENT.dll");
// $ffi->JetGetDatabaseFileInfoA(szDatabaseName, pvResult, cbMax, InfoLevel);
// szDatabaseName : CHAR*
// pvResult : void* out
// cbMax : DWORD
// InfoLevel : DWORD
// 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 JetGetDatabaseFileInfoA(
        byte[] szDatabaseName,   // CHAR*
        Pointer pvResult,   // void* out
        int cbMax,   // DWORD
        int InfoLevel   // DWORD
    );
}
@[Link("esent")]
lib LibESENT
  fun JetGetDatabaseFileInfoA = JetGetDatabaseFileInfoA(
    szDatabaseName : Int8*,   # CHAR*
    pvResult : Void*,   # void* out
    cbMax : UInt32,   # DWORD
    InfoLevel : UInt32   # DWORD
  ) : 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 JetGetDatabaseFileInfoANative = Int32 Function(Pointer<Int8>, Pointer<Void>, Uint32, Uint32);
typedef JetGetDatabaseFileInfoADart = int Function(Pointer<Int8>, Pointer<Void>, int, int);
final JetGetDatabaseFileInfoA = DynamicLibrary.open('ESENT.dll')
    .lookupFunction<JetGetDatabaseFileInfoANative, JetGetDatabaseFileInfoADart>('JetGetDatabaseFileInfoA');
// szDatabaseName : CHAR* -> Pointer<Int8>
// pvResult : void* out -> Pointer<Void>
// cbMax : DWORD -> Uint32
// InfoLevel : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function JetGetDatabaseFileInfoA(
  szDatabaseName: Pointer;   // CHAR*
  pvResult: Pointer;   // void* out
  cbMax: DWORD;   // DWORD
  InfoLevel: DWORD   // DWORD
): Integer; stdcall;
  external 'ESENT.dll' name 'JetGetDatabaseFileInfoA';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "JetGetDatabaseFileInfoA"
  c_JetGetDatabaseFileInfoA :: Ptr Int8 -> Ptr () -> Word32 -> Word32 -> IO Int32
-- szDatabaseName : CHAR* -> Ptr Int8
-- pvResult : void* out -> Ptr ()
-- cbMax : DWORD -> Word32
-- InfoLevel : DWORD -> 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 jetgetdatabasefileinfoa =
  foreign "JetGetDatabaseFileInfoA"
    ((ptr int8_t) @-> (ptr void) @-> uint32_t @-> uint32_t @-> returning int32_t)
(* szDatabaseName : CHAR* -> (ptr int8_t) *)
(* pvResult : void* out -> (ptr void) *)
(* cbMax : DWORD -> uint32_t *)
(* InfoLevel : DWORD -> 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 ("JetGetDatabaseFileInfoA" jet-get-database-file-info-a :convention :stdcall) :int32
  (sz-database-name :pointer)   ; CHAR*
  (pv-result :pointer)   ; void* out
  (cb-max :uint32)   ; DWORD
  (info-level :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $JetGetDatabaseFileInfoA = Win32::API::More->new('ESENT',
    'int JetGetDatabaseFileInfoA(LPVOID szDatabaseName, LPVOID pvResult, DWORD cbMax, DWORD InfoLevel)');
# my $ret = $JetGetDatabaseFileInfoA->Call($szDatabaseName, $pvResult, $cbMax, $InfoLevel);
# szDatabaseName : CHAR* -> LPVOID
# pvResult : void* out -> LPVOID
# cbMax : DWORD -> DWORD
# InfoLevel : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

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