SQLDriversA

関数

インストール済みのODBCドライバとその属性を列挙する。

DLLODBC32.dll文字セットANSI (-A)呼出規約winapi

シグネチャ

// ODBC32.dll  (ANSI / -A)
#include <windows.h>

SHORT SQLDriversA(
    void* henv,
    WORD fDirection,
    BYTE* szDriverDesc,   // optional
    SHORT cbDriverDescMax,
    SHORT* pcbDriverDesc,   // optional
    BYTE* szDriverAttributes,   // optional
    SHORT cbDrvrAttrMax,
    SHORT* pcbDrvrAttr   // optional
);

パラメーター

名前	型	方向	説明
henv	void*	inout	ODBCの環境ハンドル。インストール済みドライバの列挙対象。
fDirection	WORD	in	取得方向。SQL_FETCH_FIRSTまたはSQL_FETCH_NEXTを指定する。
szDriverDesc	BYTE*	outoptional	ドライバ記述を受け取るバッファ。出力用。
cbDriverDescMax	SHORT	in	szDriverDescバッファのバイト長。
pcbDriverDesc	SHORT*	outoptional	実際に返されたドライバ記述のバイト長を受け取るポインタ。
szDriverAttributes	BYTE*	outoptional	ドライバ属性(key=value;...)を受け取るバッファ。出力用。
cbDrvrAttrMax	SHORT	in	szDriverAttributesバッファのバイト長。
pcbDrvrAttr	SHORT*	outoptional	実際に返された属性文字列のバイト長を受け取るポインタ。

戻り値の型: SHORT

各言語での呼び出し定義

// ODBC32.dll  (ANSI / -A)
#include <windows.h>

SHORT SQLDriversA(
    void* henv,
    WORD fDirection,
    BYTE* szDriverDesc,   // optional
    SHORT cbDriverDescMax,
    SHORT* pcbDriverDesc,   // optional
    BYTE* szDriverAttributes,   // optional
    SHORT cbDrvrAttrMax,
    SHORT* pcbDrvrAttr   // optional
);

[DllImport("ODBC32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern short SQLDriversA(
    IntPtr henv,   // void* in/out
    ushort fDirection,   // WORD
    IntPtr szDriverDesc,   // BYTE* optional, out
    short cbDriverDescMax,   // SHORT
    IntPtr pcbDriverDesc,   // SHORT* optional, out
    IntPtr szDriverAttributes,   // BYTE* optional, out
    short cbDrvrAttrMax,   // SHORT
    IntPtr pcbDrvrAttr   // SHORT* optional, out
);

<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLDriversA(
    henv As IntPtr,   ' void* in/out
    fDirection As UShort,   ' WORD
    szDriverDesc As IntPtr,   ' BYTE* optional, out
    cbDriverDescMax As Short,   ' SHORT
    pcbDriverDesc As IntPtr,   ' SHORT* optional, out
    szDriverAttributes As IntPtr,   ' BYTE* optional, out
    cbDrvrAttrMax As Short,   ' SHORT
    pcbDrvrAttr As IntPtr   ' SHORT* optional, out
) As Short
End Function

' henv : void* in/out
' fDirection : WORD
' szDriverDesc : BYTE* optional, out
' cbDriverDescMax : SHORT
' pcbDriverDesc : SHORT* optional, out
' szDriverAttributes : BYTE* optional, out
' cbDrvrAttrMax : SHORT
' pcbDrvrAttr : SHORT* optional, out
Declare PtrSafe Function SQLDriversA Lib "odbc32" ( _
    ByVal henv As LongPtr, _
    ByVal fDirection As Integer, _
    ByVal szDriverDesc As LongPtr, _
    ByVal cbDriverDescMax As Integer, _
    ByVal pcbDriverDesc As LongPtr, _
    ByVal szDriverAttributes As LongPtr, _
    ByVal cbDrvrAttrMax As Integer, _
    ByVal pcbDrvrAttr As LongPtr) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLDriversA = ctypes.windll.odbc32.SQLDriversA
SQLDriversA.restype = ctypes.c_short
SQLDriversA.argtypes = [
    ctypes.POINTER(None),  # henv : void* in/out
    ctypes.c_ushort,  # fDirection : WORD
    ctypes.POINTER(ctypes.c_ubyte),  # szDriverDesc : BYTE* optional, out
    ctypes.c_short,  # cbDriverDescMax : SHORT
    ctypes.POINTER(ctypes.c_short),  # pcbDriverDesc : SHORT* optional, out
    ctypes.POINTER(ctypes.c_ubyte),  # szDriverAttributes : BYTE* optional, out
    ctypes.c_short,  # cbDrvrAttrMax : SHORT
    ctypes.POINTER(ctypes.c_short),  # pcbDrvrAttr : SHORT* optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLDriversA = Fiddle::Function.new(
  lib['SQLDriversA'],
  [
    Fiddle::TYPE_VOIDP,  # henv : void* in/out
    -Fiddle::TYPE_SHORT,  # fDirection : WORD
    Fiddle::TYPE_VOIDP,  # szDriverDesc : BYTE* optional, out
    Fiddle::TYPE_SHORT,  # cbDriverDescMax : SHORT
    Fiddle::TYPE_VOIDP,  # pcbDriverDesc : SHORT* optional, out
    Fiddle::TYPE_VOIDP,  # szDriverAttributes : BYTE* optional, out
    Fiddle::TYPE_SHORT,  # cbDrvrAttrMax : SHORT
    Fiddle::TYPE_VOIDP,  # pcbDrvrAttr : SHORT* optional, out
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLDriversA(
        henv: *mut (),  // void* in/out
        fDirection: u16,  // WORD
        szDriverDesc: *mut u8,  // BYTE* optional, out
        cbDriverDescMax: i16,  // SHORT
        pcbDriverDesc: *mut i16,  // SHORT* optional, out
        szDriverAttributes: *mut u8,  // BYTE* optional, out
        cbDrvrAttrMax: i16,  // SHORT
        pcbDrvrAttr: *mut i16  // SHORT* optional, out
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLDriversA(IntPtr henv, ushort fDirection, IntPtr szDriverDesc, short cbDriverDescMax, IntPtr pcbDriverDesc, IntPtr szDriverAttributes, short cbDrvrAttrMax, IntPtr pcbDrvrAttr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLDriversA' -Namespace Win32 -PassThru
# $api::SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)

#uselib "ODBC32.dll"
#func global SQLDriversA "SQLDriversA" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; SQLDriversA henv, fDirection, varptr(szDriverDesc), cbDriverDescMax, varptr(pcbDriverDesc), varptr(szDriverAttributes), cbDrvrAttrMax, varptr(pcbDrvrAttr)   ; 戻り値は stat
; henv : void* in/out -> "sptr"
; fDirection : WORD -> "sptr"
; szDriverDesc : BYTE* optional, out -> "sptr"
; cbDriverDescMax : SHORT -> "sptr"
; pcbDriverDesc : SHORT* optional, out -> "sptr"
; szDriverAttributes : BYTE* optional, out -> "sptr"
; cbDrvrAttrMax : SHORT -> "sptr"
; pcbDrvrAttr : SHORT* 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 "ODBC32.dll"
#cfunc global SQLDriversA "SQLDriversA" sptr, int, var, int, var, var, int, var
; res = SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)
; henv : void* in/out -> "sptr"
; fDirection : WORD -> "int"
; szDriverDesc : BYTE* optional, out -> "var"
; cbDriverDescMax : SHORT -> "int"
; pcbDriverDesc : SHORT* optional, out -> "var"
; szDriverAttributes : BYTE* optional, out -> "var"
; cbDrvrAttrMax : SHORT -> "int"
; pcbDrvrAttr : SHORT* 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 "ODBC32.dll"
#cfunc global SQLDriversA "SQLDriversA" sptr, int, sptr, int, sptr, sptr, int, sptr
; res = SQLDriversA(henv, fDirection, varptr(szDriverDesc), cbDriverDescMax, varptr(pcbDriverDesc), varptr(szDriverAttributes), cbDrvrAttrMax, varptr(pcbDrvrAttr))
; henv : void* in/out -> "sptr"
; fDirection : WORD -> "int"
; szDriverDesc : BYTE* optional, out -> "sptr"
; cbDriverDescMax : SHORT -> "int"
; pcbDriverDesc : SHORT* optional, out -> "sptr"
; szDriverAttributes : BYTE* optional, out -> "sptr"
; cbDrvrAttrMax : SHORT -> "int"
; pcbDrvrAttr : SHORT* 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:

; SHORT SQLDriversA(void* henv, WORD fDirection, BYTE* szDriverDesc, SHORT cbDriverDescMax, SHORT* pcbDriverDesc, BYTE* szDriverAttributes, SHORT cbDrvrAttrMax, SHORT* pcbDrvrAttr)
#uselib "ODBC32.dll"
#cfunc global SQLDriversA "SQLDriversA" intptr, int, var, int, var, var, int, var
; res = SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)
; henv : void* in/out -> "intptr"
; fDirection : WORD -> "int"
; szDriverDesc : BYTE* optional, out -> "var"
; cbDriverDescMax : SHORT -> "int"
; pcbDriverDesc : SHORT* optional, out -> "var"
; szDriverAttributes : BYTE* optional, out -> "var"
; cbDrvrAttrMax : SHORT -> "int"
; pcbDrvrAttr : SHORT* 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。; SHORT SQLDriversA(void* henv, WORD fDirection, BYTE* szDriverDesc, SHORT cbDriverDescMax, SHORT* pcbDriverDesc, BYTE* szDriverAttributes, SHORT cbDrvrAttrMax, SHORT* pcbDrvrAttr)
#uselib "ODBC32.dll"
#cfunc global SQLDriversA "SQLDriversA" intptr, int, intptr, int, intptr, intptr, int, intptr
; res = SQLDriversA(henv, fDirection, varptr(szDriverDesc), cbDriverDescMax, varptr(pcbDriverDesc), varptr(szDriverAttributes), cbDrvrAttrMax, varptr(pcbDrvrAttr))
; henv : void* in/out -> "intptr"
; fDirection : WORD -> "int"
; szDriverDesc : BYTE* optional, out -> "intptr"
; cbDriverDescMax : SHORT -> "int"
; pcbDriverDesc : SHORT* optional, out -> "intptr"
; szDriverAttributes : BYTE* optional, out -> "intptr"
; cbDrvrAttrMax : SHORT -> "int"
; pcbDrvrAttr : SHORT* 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 (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLDriversA = odbc32.NewProc("SQLDriversA")
)

// henv (void* in/out), fDirection (WORD), szDriverDesc (BYTE* optional, out), cbDriverDescMax (SHORT), pcbDriverDesc (SHORT* optional, out), szDriverAttributes (BYTE* optional, out), cbDrvrAttrMax (SHORT), pcbDrvrAttr (SHORT* optional, out)
r1, _, err := procSQLDriversA.Call(
	uintptr(henv),
	uintptr(fDirection),
	uintptr(szDriverDesc),
	uintptr(cbDriverDescMax),
	uintptr(pcbDriverDesc),
	uintptr(szDriverAttributes),
	uintptr(cbDrvrAttrMax),
	uintptr(pcbDrvrAttr),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLDriversA(
  henv: Pointer;   // void* in/out
  fDirection: Word;   // WORD
  szDriverDesc: Pointer;   // BYTE* optional, out
  cbDriverDescMax: Smallint;   // SHORT
  pcbDriverDesc: Pointer;   // SHORT* optional, out
  szDriverAttributes: Pointer;   // BYTE* optional, out
  cbDrvrAttrMax: Smallint;   // SHORT
  pcbDrvrAttr: Pointer   // SHORT* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLDriversA';

result := DllCall("ODBC32\SQLDriversA"
    , "Ptr", henv   ; void* in/out
    , "UShort", fDirection   ; WORD
    , "Ptr", szDriverDesc   ; BYTE* optional, out
    , "Short", cbDriverDescMax   ; SHORT
    , "Ptr", pcbDriverDesc   ; SHORT* optional, out
    , "Ptr", szDriverAttributes   ; BYTE* optional, out
    , "Short", cbDrvrAttrMax   ; SHORT
    , "Ptr", pcbDrvrAttr   ; SHORT* optional, out
    , "Short")   ; return: SHORT

●SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr) = DLL("ODBC32.dll", "int SQLDriversA(void*, int, void*, int, void*, void*, int, void*)")
# 呼び出し: SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)
# henv : void* in/out -> "void*"
# fDirection : WORD -> "int"
# szDriverDesc : BYTE* optional, out -> "void*"
# cbDriverDescMax : SHORT -> "int"
# pcbDriverDesc : SHORT* optional, out -> "void*"
# szDriverAttributes : BYTE* optional, out -> "void*"
# cbDrvrAttrMax : SHORT -> "int"
# pcbDrvrAttr : SHORT* 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 "odbc32" fn SQLDriversA(
    henv: ?*anyopaque, // void* in/out
    fDirection: u16, // WORD
    szDriverDesc: [*c]u8, // BYTE* optional, out
    cbDriverDescMax: i16, // SHORT
    pcbDriverDesc: [*c]i16, // SHORT* optional, out
    szDriverAttributes: [*c]u8, // BYTE* optional, out
    cbDrvrAttrMax: i16, // SHORT
    pcbDrvrAttr: [*c]i16 // SHORT* optional, out
) callconv(std.os.windows.WINAPI) i16;

proc SQLDriversA(
    henv: pointer,  # void* in/out
    fDirection: uint16,  # WORD
    szDriverDesc: ptr uint8,  # BYTE* optional, out
    cbDriverDescMax: int16,  # SHORT
    pcbDriverDesc: ptr int16,  # SHORT* optional, out
    szDriverAttributes: ptr uint8,  # BYTE* optional, out
    cbDrvrAttrMax: int16,  # SHORT
    pcbDrvrAttr: ptr int16  # SHORT* optional, out
): int16 {.importc: "SQLDriversA", stdcall, dynlib: "ODBC32.dll".}

pragma(lib, "odbc32");
extern(Windows)
short SQLDriversA(
    void* henv,   // void* in/out
    ushort fDirection,   // WORD
    ubyte* szDriverDesc,   // BYTE* optional, out
    short cbDriverDescMax,   // SHORT
    short* pcbDriverDesc,   // SHORT* optional, out
    ubyte* szDriverAttributes,   // BYTE* optional, out
    short cbDrvrAttrMax,   // SHORT
    short* pcbDrvrAttr   // SHORT* optional, out
);

ccall((:SQLDriversA, "ODBC32.dll"), stdcall, Int16,
      (Ptr{Cvoid}, UInt16, Ptr{UInt8}, Int16, Ptr{Int16}, Ptr{UInt8}, Int16, Ptr{Int16}),
      henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)
# henv : void* in/out -> Ptr{Cvoid}
# fDirection : WORD -> UInt16
# szDriverDesc : BYTE* optional, out -> Ptr{UInt8}
# cbDriverDescMax : SHORT -> Int16
# pcbDriverDesc : SHORT* optional, out -> Ptr{Int16}
# szDriverAttributes : BYTE* optional, out -> Ptr{UInt8}
# cbDrvrAttrMax : SHORT -> Int16
# pcbDrvrAttr : SHORT* optional, out -> Ptr{Int16}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int16_t SQLDriversA(
    void* henv,
    uint16_t fDirection,
    uint8_t* szDriverDesc,
    int16_t cbDriverDescMax,
    int16_t* pcbDriverDesc,
    uint8_t* szDriverAttributes,
    int16_t cbDrvrAttrMax,
    int16_t* pcbDrvrAttr);
]]
local odbc32 = ffi.load("odbc32")
-- odbc32.SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)
-- henv : void* in/out
-- fDirection : WORD
-- szDriverDesc : BYTE* optional, out
-- cbDriverDescMax : SHORT
-- pcbDriverDesc : SHORT* optional, out
-- szDriverAttributes : BYTE* optional, out
-- cbDrvrAttrMax : SHORT
-- pcbDrvrAttr : SHORT* 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('ODBC32.dll');
const SQLDriversA = lib.func('__stdcall', 'SQLDriversA', 'int16_t', ['void *', 'uint16_t', 'uint8_t *', 'int16_t', 'int16_t *', 'uint8_t *', 'int16_t', 'int16_t *']);
// SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)
// henv : void* in/out -> 'void *'
// fDirection : WORD -> 'uint16_t'
// szDriverDesc : BYTE* optional, out -> 'uint8_t *'
// cbDriverDescMax : SHORT -> 'int16_t'
// pcbDriverDesc : SHORT* optional, out -> 'int16_t *'
// szDriverAttributes : BYTE* optional, out -> 'uint8_t *'
// cbDrvrAttrMax : SHORT -> 'int16_t'
// pcbDrvrAttr : SHORT* optional, out -> 'int16_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("ODBC32.dll", {
  SQLDriversA: { parameters: ["pointer", "u16", "pointer", "i16", "pointer", "pointer", "i16", "pointer"], result: "i16" },
});
// lib.symbols.SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr)
// henv : void* in/out -> "pointer"
// fDirection : WORD -> "u16"
// szDriverDesc : BYTE* optional, out -> "pointer"
// cbDriverDescMax : SHORT -> "i16"
// pcbDriverDesc : SHORT* optional, out -> "pointer"
// szDriverAttributes : BYTE* optional, out -> "pointer"
// cbDrvrAttrMax : SHORT -> "i16"
// pcbDrvrAttr : SHORT* 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
int16_t SQLDriversA(
    void* henv,
    uint16_t fDirection,
    uint8_t* szDriverDesc,
    int16_t cbDriverDescMax,
    int16_t* pcbDriverDesc,
    uint8_t* szDriverAttributes,
    int16_t cbDrvrAttrMax,
    int16_t* pcbDrvrAttr);
C, "ODBC32.dll");
// $ffi->SQLDriversA(henv, fDirection, szDriverDesc, cbDriverDescMax, pcbDriverDesc, szDriverAttributes, cbDrvrAttrMax, pcbDrvrAttr);
// henv : void* in/out
// fDirection : WORD
// szDriverDesc : BYTE* optional, out
// cbDriverDescMax : SHORT
// pcbDriverDesc : SHORT* optional, out
// szDriverAttributes : BYTE* optional, out
// cbDrvrAttrMax : SHORT
// pcbDrvrAttr : SHORT* 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 Odbc32 extends StdCallLibrary {
    Odbc32 INSTANCE = Native.load("odbc32", Odbc32.class, W32APIOptions.ASCII_OPTIONS);
    short SQLDriversA(
        Pointer henv,   // void* in/out
        short fDirection,   // WORD
        byte[] szDriverDesc,   // BYTE* optional, out
        short cbDriverDescMax,   // SHORT
        ShortByReference pcbDriverDesc,   // SHORT* optional, out
        byte[] szDriverAttributes,   // BYTE* optional, out
        short cbDrvrAttrMax,   // SHORT
        ShortByReference pcbDrvrAttr   // SHORT* optional, out
    );
}

@[Link("odbc32")]
lib LibODBC32
  fun SQLDriversA = SQLDriversA(
    henv : Void*,   # void* in/out
    fDirection : UInt16,   # WORD
    szDriverDesc : UInt8*,   # BYTE* optional, out
    cbDriverDescMax : Int16,   # SHORT
    pcbDriverDesc : Int16*,   # SHORT* optional, out
    szDriverAttributes : UInt8*,   # BYTE* optional, out
    cbDrvrAttrMax : Int16,   # SHORT
    pcbDrvrAttr : Int16*   # SHORT* optional, out
  ) : Int16
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 SQLDriversANative = Int16 Function(Pointer<Void>, Uint16, Pointer<Uint8>, Int16, Pointer<Int16>, Pointer<Uint8>, Int16, Pointer<Int16>);
typedef SQLDriversADart = int Function(Pointer<Void>, int, Pointer<Uint8>, int, Pointer<Int16>, Pointer<Uint8>, int, Pointer<Int16>);
final SQLDriversA = DynamicLibrary.open('ODBC32.dll')
    .lookupFunction<SQLDriversANative, SQLDriversADart>('SQLDriversA');
// henv : void* in/out -> Pointer<Void>
// fDirection : WORD -> Uint16
// szDriverDesc : BYTE* optional, out -> Pointer<Uint8>
// cbDriverDescMax : SHORT -> Int16
// pcbDriverDesc : SHORT* optional, out -> Pointer<Int16>
// szDriverAttributes : BYTE* optional, out -> Pointer<Uint8>
// cbDrvrAttrMax : SHORT -> Int16
// pcbDrvrAttr : SHORT* optional, out -> Pointer<Int16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SQLDriversA(
  henv: Pointer;   // void* in/out
  fDirection: Word;   // WORD
  szDriverDesc: Pointer;   // BYTE* optional, out
  cbDriverDescMax: Smallint;   // SHORT
  pcbDriverDesc: Pointer;   // SHORT* optional, out
  szDriverAttributes: Pointer;   // BYTE* optional, out
  cbDrvrAttrMax: Smallint;   // SHORT
  pcbDrvrAttr: Pointer   // SHORT* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLDriversA';

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

foreign import stdcall safe "SQLDriversA"
  c_SQLDriversA :: Ptr () -> Word16 -> Ptr Word8 -> Int16 -> Ptr Int16 -> Ptr Word8 -> Int16 -> Ptr Int16 -> IO Int16
-- henv : void* in/out -> Ptr ()
-- fDirection : WORD -> Word16
-- szDriverDesc : BYTE* optional, out -> Ptr Word8
-- cbDriverDescMax : SHORT -> Int16
-- pcbDriverDesc : SHORT* optional, out -> Ptr Int16
-- szDriverAttributes : BYTE* optional, out -> Ptr Word8
-- cbDrvrAttrMax : SHORT -> Int16
-- pcbDrvrAttr : SHORT* optional, out -> Ptr Int16
-- 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 sqldriversa =
  foreign "SQLDriversA"
    ((ptr void) @-> uint16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr int16_t) @-> (ptr uint8_t) @-> int16_t @-> (ptr int16_t) @-> returning int16_t)
(* henv : void* in/out -> (ptr void) *)
(* fDirection : WORD -> uint16_t *)
(* szDriverDesc : BYTE* optional, out -> (ptr uint8_t) *)
(* cbDriverDescMax : SHORT -> int16_t *)
(* pcbDriverDesc : SHORT* optional, out -> (ptr int16_t) *)
(* szDriverAttributes : BYTE* optional, out -> (ptr uint8_t) *)
(* cbDrvrAttrMax : SHORT -> int16_t *)
(* pcbDrvrAttr : SHORT* optional, out -> (ptr int16_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 odbc32 (t "ODBC32.dll"))
(cffi:use-foreign-library odbc32)

(cffi:defcfun ("SQLDriversA" sqldrivers-a :convention :stdcall) :int16
  (henv :pointer)   ; void* in/out
  (f-direction :uint16)   ; WORD
  (sz-driver-desc :pointer)   ; BYTE* optional, out
  (cb-driver-desc-max :int16)   ; SHORT
  (pcb-driver-desc :pointer)   ; SHORT* optional, out
  (sz-driver-attributes :pointer)   ; BYTE* optional, out
  (cb-drvr-attr-max :int16)   ; SHORT
  (pcb-drvr-attr :pointer))   ; SHORT* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SQLDriversA = Win32::API::More->new('ODBC32',
    'short SQLDriversA(LPVOID henv, WORD fDirection, LPVOID szDriverDesc, short cbDriverDescMax, LPVOID pcbDriverDesc, LPVOID szDriverAttributes, short cbDrvrAttrMax, LPVOID pcbDrvrAttr)');
# my $ret = $SQLDriversA->Call($henv, $fDirection, $szDriverDesc, $cbDriverDescMax, $pcbDriverDesc, $szDriverAttributes, $cbDrvrAttrMax, $pcbDrvrAttr);
# henv : void* in/out -> LPVOID
# fDirection : WORD -> WORD
# szDriverDesc : BYTE* optional, out -> LPVOID
# cbDriverDescMax : SHORT -> short
# pcbDriverDesc : SHORT* optional, out -> LPVOID
# szDriverAttributes : BYTE* optional, out -> LPVOID
# cbDrvrAttrMax : SHORT -> short
# pcbDrvrAttr : SHORT* 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。

SQLDriversA

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パラメーター

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