Win32 API 日本語リファレンス
ホーム › System.Search › SQLGetDescRecA

SQLGetDescRecA

関数
記述子レコードの複数フィールド値をまとめて取得する(ANSI)。
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 SQLGetDescRecA(
    void* hdesc,
    SHORT iRecord,
    BYTE* szName,   // optional
    SHORT cbNameMax,
    SHORT* pcbName,   // optional
    SHORT* pfType,   // optional
    SHORT* pfSubType,   // optional
    INT* pLength,   // optional
    SHORT* pPrecision,   // optional
    SHORT* pScale,   // optional
    SHORT* pNullable   // optional
);

パラメーター

名前型方向説明
hdescvoid*inoutODBCの記述子ハンドル。レコード取得対象。
iRecordSHORTin対象レコード番号。1始まりで指定する。
szNameBYTE*outoptional列名やパラメータ名を受け取るバッファ。出力用。
cbNameMaxSHORTinszNameバッファのバイト長。
pcbNameSHORT*outoptional実際に返された名前のバイト長を受け取るポインタ。
pfTypeSHORT*outoptionalデータ型(SQL_*)を受け取るポインタ。
pfSubTypeSHORT*outoptional日時/区間型の場合のサブタイプを受け取るポインタ。
pLengthINT*outoptionalデータ長を受け取るポインタ。
pPrecisionSHORT*outoptional精度を受け取るポインタ。
pScaleSHORT*outoptionalスケール(小数桁数)を受け取るポインタ。
pNullableSHORT*outoptionalNULL許容性(SQL_NULLABLE等)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 SQLGetDescRecA(
    void* hdesc,
    SHORT iRecord,
    BYTE* szName,   // optional
    SHORT cbNameMax,
    SHORT* pcbName,   // optional
    SHORT* pfType,   // optional
    SHORT* pfSubType,   // optional
    INT* pLength,   // optional
    SHORT* pPrecision,   // optional
    SHORT* pScale,   // optional
    SHORT* pNullable   // optional
);
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern short SQLGetDescRecA(
    IntPtr hdesc,   // void* in/out
    short iRecord,   // SHORT
    IntPtr szName,   // BYTE* optional, out
    short cbNameMax,   // SHORT
    IntPtr pcbName,   // SHORT* optional, out
    IntPtr pfType,   // SHORT* optional, out
    IntPtr pfSubType,   // SHORT* optional, out
    IntPtr pLength,   // INT* optional, out
    IntPtr pPrecision,   // SHORT* optional, out
    IntPtr pScale,   // SHORT* optional, out
    IntPtr pNullable   // SHORT* optional, out
);
<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLGetDescRecA(
    hdesc As IntPtr,   ' void* in/out
    iRecord As Short,   ' SHORT
    szName As IntPtr,   ' BYTE* optional, out
    cbNameMax As Short,   ' SHORT
    pcbName As IntPtr,   ' SHORT* optional, out
    pfType As IntPtr,   ' SHORT* optional, out
    pfSubType As IntPtr,   ' SHORT* optional, out
    pLength As IntPtr,   ' INT* optional, out
    pPrecision As IntPtr,   ' SHORT* optional, out
    pScale As IntPtr,   ' SHORT* optional, out
    pNullable As IntPtr   ' SHORT* optional, out
) As Short
End Function
' hdesc : void* in/out
' iRecord : SHORT
' szName : BYTE* optional, out
' cbNameMax : SHORT
' pcbName : SHORT* optional, out
' pfType : SHORT* optional, out
' pfSubType : SHORT* optional, out
' pLength : INT* optional, out
' pPrecision : SHORT* optional, out
' pScale : SHORT* optional, out
' pNullable : SHORT* optional, out
Declare PtrSafe Function SQLGetDescRecA Lib "odbc32" ( _
    ByVal hdesc As LongPtr, _
    ByVal iRecord As Integer, _
    ByVal szName As LongPtr, _
    ByVal cbNameMax As Integer, _
    ByVal pcbName As LongPtr, _
    ByVal pfType As LongPtr, _
    ByVal pfSubType As LongPtr, _
    ByVal pLength As LongPtr, _
    ByVal pPrecision As LongPtr, _
    ByVal pScale As LongPtr, _
    ByVal pNullable 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

SQLGetDescRecA = ctypes.windll.odbc32.SQLGetDescRecA
SQLGetDescRecA.restype = ctypes.c_short
SQLGetDescRecA.argtypes = [
    ctypes.POINTER(None),  # hdesc : void* in/out
    ctypes.c_short,  # iRecord : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # szName : BYTE* optional, out
    ctypes.c_short,  # cbNameMax : SHORT
    ctypes.POINTER(ctypes.c_short),  # pcbName : SHORT* optional, out
    ctypes.POINTER(ctypes.c_short),  # pfType : SHORT* optional, out
    ctypes.POINTER(ctypes.c_short),  # pfSubType : SHORT* optional, out
    ctypes.POINTER(ctypes.c_int),  # pLength : INT* optional, out
    ctypes.POINTER(ctypes.c_short),  # pPrecision : SHORT* optional, out
    ctypes.POINTER(ctypes.c_short),  # pScale : SHORT* optional, out
    ctypes.POINTER(ctypes.c_short),  # pNullable : SHORT* optional, out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLGetDescRecA = Fiddle::Function.new(
  lib['SQLGetDescRecA'],
  [
    Fiddle::TYPE_VOIDP,  # hdesc : void* in/out
    Fiddle::TYPE_SHORT,  # iRecord : SHORT
    Fiddle::TYPE_VOIDP,  # szName : BYTE* optional, out
    Fiddle::TYPE_SHORT,  # cbNameMax : SHORT
    Fiddle::TYPE_VOIDP,  # pcbName : SHORT* optional, out
    Fiddle::TYPE_VOIDP,  # pfType : SHORT* optional, out
    Fiddle::TYPE_VOIDP,  # pfSubType : SHORT* optional, out
    Fiddle::TYPE_VOIDP,  # pLength : INT* optional, out
    Fiddle::TYPE_VOIDP,  # pPrecision : SHORT* optional, out
    Fiddle::TYPE_VOIDP,  # pScale : SHORT* optional, out
    Fiddle::TYPE_VOIDP,  # pNullable : SHORT* optional, out
  ],
  Fiddle::TYPE_SHORT)
#[link(name = "odbc32")]
extern "system" {
    fn SQLGetDescRecA(
        hdesc: *mut (),  // void* in/out
        iRecord: i16,  // SHORT
        szName: *mut u8,  // BYTE* optional, out
        cbNameMax: i16,  // SHORT
        pcbName: *mut i16,  // SHORT* optional, out
        pfType: *mut i16,  // SHORT* optional, out
        pfSubType: *mut i16,  // SHORT* optional, out
        pLength: *mut i32,  // INT* optional, out
        pPrecision: *mut i16,  // SHORT* optional, out
        pScale: *mut i16,  // SHORT* optional, out
        pNullable: *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 SQLGetDescRecA(IntPtr hdesc, short iRecord, IntPtr szName, short cbNameMax, IntPtr pcbName, IntPtr pfType, IntPtr pfSubType, IntPtr pLength, IntPtr pPrecision, IntPtr pScale, IntPtr pNullable);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLGetDescRecA' -Namespace Win32 -PassThru
# $api::SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
#uselib "ODBC32.dll"
#func global SQLGetDescRecA "SQLGetDescRecA" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; SQLGetDescRecA hdesc, iRecord, varptr(szName), cbNameMax, varptr(pcbName), varptr(pfType), varptr(pfSubType), varptr(pLength), varptr(pPrecision), varptr(pScale), varptr(pNullable)   ; 戻り値は stat
; hdesc : void* in/out -> "sptr"
; iRecord : SHORT -> "sptr"
; szName : BYTE* optional, out -> "sptr"
; cbNameMax : SHORT -> "sptr"
; pcbName : SHORT* optional, out -> "sptr"
; pfType : SHORT* optional, out -> "sptr"
; pfSubType : SHORT* optional, out -> "sptr"
; pLength : INT* optional, out -> "sptr"
; pPrecision : SHORT* optional, out -> "sptr"
; pScale : SHORT* optional, out -> "sptr"
; pNullable : 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 SQLGetDescRecA "SQLGetDescRecA" sptr, int, var, int, var, var, var, var, var, var, var
; res = SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
; hdesc : void* in/out -> "sptr"
; iRecord : SHORT -> "int"
; szName : BYTE* optional, out -> "var"
; cbNameMax : SHORT -> "int"
; pcbName : SHORT* optional, out -> "var"
; pfType : SHORT* optional, out -> "var"
; pfSubType : SHORT* optional, out -> "var"
; pLength : INT* optional, out -> "var"
; pPrecision : SHORT* optional, out -> "var"
; pScale : SHORT* optional, out -> "var"
; pNullable : 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。
出力引数: 
; SHORT SQLGetDescRecA(void* hdesc, SHORT iRecord, BYTE* szName, SHORT cbNameMax, SHORT* pcbName, SHORT* pfType, SHORT* pfSubType, INT* pLength, SHORT* pPrecision, SHORT* pScale, SHORT* pNullable)
#uselib "ODBC32.dll"
#cfunc global SQLGetDescRecA "SQLGetDescRecA" intptr, int, var, int, var, var, var, var, var, var, var
; res = SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
; hdesc : void* in/out -> "intptr"
; iRecord : SHORT -> "int"
; szName : BYTE* optional, out -> "var"
; cbNameMax : SHORT -> "int"
; pcbName : SHORT* optional, out -> "var"
; pfType : SHORT* optional, out -> "var"
; pfSubType : SHORT* optional, out -> "var"
; pLength : INT* optional, out -> "var"
; pPrecision : SHORT* optional, out -> "var"
; pScale : SHORT* optional, out -> "var"
; pNullable : 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。
import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLGetDescRecA = odbc32.NewProc("SQLGetDescRecA")
)

// hdesc (void* in/out), iRecord (SHORT), szName (BYTE* optional, out), cbNameMax (SHORT), pcbName (SHORT* optional, out), pfType (SHORT* optional, out), pfSubType (SHORT* optional, out), pLength (INT* optional, out), pPrecision (SHORT* optional, out), pScale (SHORT* optional, out), pNullable (SHORT* optional, out)
r1, _, err := procSQLGetDescRecA.Call(
	uintptr(hdesc),
	uintptr(iRecord),
	uintptr(szName),
	uintptr(cbNameMax),
	uintptr(pcbName),
	uintptr(pfType),
	uintptr(pfSubType),
	uintptr(pLength),
	uintptr(pPrecision),
	uintptr(pScale),
	uintptr(pNullable),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT
function SQLGetDescRecA(
  hdesc: Pointer;   // void* in/out
  iRecord: Smallint;   // SHORT
  szName: Pointer;   // BYTE* optional, out
  cbNameMax: Smallint;   // SHORT
  pcbName: Pointer;   // SHORT* optional, out
  pfType: Pointer;   // SHORT* optional, out
  pfSubType: Pointer;   // SHORT* optional, out
  pLength: Pointer;   // INT* optional, out
  pPrecision: Pointer;   // SHORT* optional, out
  pScale: Pointer;   // SHORT* optional, out
  pNullable: Pointer   // SHORT* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetDescRecA';
result := DllCall("ODBC32\SQLGetDescRecA"
    , "Ptr", hdesc   ; void* in/out
    , "Short", iRecord   ; SHORT
    , "Ptr", szName   ; BYTE* optional, out
    , "Short", cbNameMax   ; SHORT
    , "Ptr", pcbName   ; SHORT* optional, out
    , "Ptr", pfType   ; SHORT* optional, out
    , "Ptr", pfSubType   ; SHORT* optional, out
    , "Ptr", pLength   ; INT* optional, out
    , "Ptr", pPrecision   ; SHORT* optional, out
    , "Ptr", pScale   ; SHORT* optional, out
    , "Ptr", pNullable   ; SHORT* optional, out
    , "Short")   ; return: SHORT
●SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable) = DLL("ODBC32.dll", "int SQLGetDescRecA(void*, int, void*, int, void*, void*, void*, void*, void*, void*, void*)")
# 呼び出し: SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
# hdesc : void* in/out -> "void*"
# iRecord : SHORT -> "int"
# szName : BYTE* optional, out -> "void*"
# cbNameMax : SHORT -> "int"
# pcbName : SHORT* optional, out -> "void*"
# pfType : SHORT* optional, out -> "void*"
# pfSubType : SHORT* optional, out -> "void*"
# pLength : INT* optional, out -> "void*"
# pPrecision : SHORT* optional, out -> "void*"
# pScale : SHORT* optional, out -> "void*"
# pNullable : 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 SQLGetDescRecA(
    hdesc: ?*anyopaque, // void* in/out
    iRecord: i16, // SHORT
    szName: [*c]u8, // BYTE* optional, out
    cbNameMax: i16, // SHORT
    pcbName: [*c]i16, // SHORT* optional, out
    pfType: [*c]i16, // SHORT* optional, out
    pfSubType: [*c]i16, // SHORT* optional, out
    pLength: [*c]i32, // INT* optional, out
    pPrecision: [*c]i16, // SHORT* optional, out
    pScale: [*c]i16, // SHORT* optional, out
    pNullable: [*c]i16 // SHORT* optional, out
) callconv(std.os.windows.WINAPI) i16;
proc SQLGetDescRecA(
    hdesc: pointer,  # void* in/out
    iRecord: int16,  # SHORT
    szName: ptr uint8,  # BYTE* optional, out
    cbNameMax: int16,  # SHORT
    pcbName: ptr int16,  # SHORT* optional, out
    pfType: ptr int16,  # SHORT* optional, out
    pfSubType: ptr int16,  # SHORT* optional, out
    pLength: ptr int32,  # INT* optional, out
    pPrecision: ptr int16,  # SHORT* optional, out
    pScale: ptr int16,  # SHORT* optional, out
    pNullable: ptr int16  # SHORT* optional, out
): int16 {.importc: "SQLGetDescRecA", stdcall, dynlib: "ODBC32.dll".}
pragma(lib, "odbc32");
extern(Windows)
short SQLGetDescRecA(
    void* hdesc,   // void* in/out
    short iRecord,   // SHORT
    ubyte* szName,   // BYTE* optional, out
    short cbNameMax,   // SHORT
    short* pcbName,   // SHORT* optional, out
    short* pfType,   // SHORT* optional, out
    short* pfSubType,   // SHORT* optional, out
    int* pLength,   // INT* optional, out
    short* pPrecision,   // SHORT* optional, out
    short* pScale,   // SHORT* optional, out
    short* pNullable   // SHORT* optional, out
);
ccall((:SQLGetDescRecA, "ODBC32.dll"), stdcall, Int16,
      (Ptr{Cvoid}, Int16, Ptr{UInt8}, Int16, Ptr{Int16}, Ptr{Int16}, Ptr{Int16}, Ptr{Int32}, Ptr{Int16}, Ptr{Int16}, Ptr{Int16}),
      hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
# hdesc : void* in/out -> Ptr{Cvoid}
# iRecord : SHORT -> Int16
# szName : BYTE* optional, out -> Ptr{UInt8}
# cbNameMax : SHORT -> Int16
# pcbName : SHORT* optional, out -> Ptr{Int16}
# pfType : SHORT* optional, out -> Ptr{Int16}
# pfSubType : SHORT* optional, out -> Ptr{Int16}
# pLength : INT* optional, out -> Ptr{Int32}
# pPrecision : SHORT* optional, out -> Ptr{Int16}
# pScale : SHORT* optional, out -> Ptr{Int16}
# pNullable : 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 SQLGetDescRecA(
    void* hdesc,
    int16_t iRecord,
    uint8_t* szName,
    int16_t cbNameMax,
    int16_t* pcbName,
    int16_t* pfType,
    int16_t* pfSubType,
    int32_t* pLength,
    int16_t* pPrecision,
    int16_t* pScale,
    int16_t* pNullable);
]]
local odbc32 = ffi.load("odbc32")
-- odbc32.SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
-- hdesc : void* in/out
-- iRecord : SHORT
-- szName : BYTE* optional, out
-- cbNameMax : SHORT
-- pcbName : SHORT* optional, out
-- pfType : SHORT* optional, out
-- pfSubType : SHORT* optional, out
-- pLength : INT* optional, out
-- pPrecision : SHORT* optional, out
-- pScale : SHORT* optional, out
-- pNullable : 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 SQLGetDescRecA = lib.func('__stdcall', 'SQLGetDescRecA', 'int16_t', ['void *', 'int16_t', 'uint8_t *', 'int16_t', 'int16_t *', 'int16_t *', 'int16_t *', 'int32_t *', 'int16_t *', 'int16_t *', 'int16_t *']);
// SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
// hdesc : void* in/out -> 'void *'
// iRecord : SHORT -> 'int16_t'
// szName : BYTE* optional, out -> 'uint8_t *'
// cbNameMax : SHORT -> 'int16_t'
// pcbName : SHORT* optional, out -> 'int16_t *'
// pfType : SHORT* optional, out -> 'int16_t *'
// pfSubType : SHORT* optional, out -> 'int16_t *'
// pLength : INT* optional, out -> 'int32_t *'
// pPrecision : SHORT* optional, out -> 'int16_t *'
// pScale : SHORT* optional, out -> 'int16_t *'
// pNullable : 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", {
  SQLGetDescRecA: { parameters: ["pointer", "i16", "pointer", "i16", "pointer", "pointer", "pointer", "pointer", "pointer", "pointer", "pointer"], result: "i16" },
});
// lib.symbols.SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable)
// hdesc : void* in/out -> "pointer"
// iRecord : SHORT -> "i16"
// szName : BYTE* optional, out -> "pointer"
// cbNameMax : SHORT -> "i16"
// pcbName : SHORT* optional, out -> "pointer"
// pfType : SHORT* optional, out -> "pointer"
// pfSubType : SHORT* optional, out -> "pointer"
// pLength : INT* optional, out -> "pointer"
// pPrecision : SHORT* optional, out -> "pointer"
// pScale : SHORT* optional, out -> "pointer"
// pNullable : 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 SQLGetDescRecA(
    void* hdesc,
    int16_t iRecord,
    uint8_t* szName,
    int16_t cbNameMax,
    int16_t* pcbName,
    int16_t* pfType,
    int16_t* pfSubType,
    int32_t* pLength,
    int16_t* pPrecision,
    int16_t* pScale,
    int16_t* pNullable);
C, "ODBC32.dll");
// $ffi->SQLGetDescRecA(hdesc, iRecord, szName, cbNameMax, pcbName, pfType, pfSubType, pLength, pPrecision, pScale, pNullable);
// hdesc : void* in/out
// iRecord : SHORT
// szName : BYTE* optional, out
// cbNameMax : SHORT
// pcbName : SHORT* optional, out
// pfType : SHORT* optional, out
// pfSubType : SHORT* optional, out
// pLength : INT* optional, out
// pPrecision : SHORT* optional, out
// pScale : SHORT* optional, out
// pNullable : 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 SQLGetDescRecA(
        Pointer hdesc,   // void* in/out
        short iRecord,   // SHORT
        byte[] szName,   // BYTE* optional, out
        short cbNameMax,   // SHORT
        ShortByReference pcbName,   // SHORT* optional, out
        ShortByReference pfType,   // SHORT* optional, out
        ShortByReference pfSubType,   // SHORT* optional, out
        IntByReference pLength,   // INT* optional, out
        ShortByReference pPrecision,   // SHORT* optional, out
        ShortByReference pScale,   // SHORT* optional, out
        ShortByReference pNullable   // SHORT* optional, out
    );
}
@[Link("odbc32")]
lib LibODBC32
  fun SQLGetDescRecA = SQLGetDescRecA(
    hdesc : Void*,   # void* in/out
    iRecord : Int16,   # SHORT
    szName : UInt8*,   # BYTE* optional, out
    cbNameMax : Int16,   # SHORT
    pcbName : Int16*,   # SHORT* optional, out
    pfType : Int16*,   # SHORT* optional, out
    pfSubType : Int16*,   # SHORT* optional, out
    pLength : Int32*,   # INT* optional, out
    pPrecision : Int16*,   # SHORT* optional, out
    pScale : Int16*,   # SHORT* optional, out
    pNullable : 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 SQLGetDescRecANative = Int16 Function(Pointer<Void>, Int16, Pointer<Uint8>, Int16, Pointer<Int16>, Pointer<Int16>, Pointer<Int16>, Pointer<Int32>, Pointer<Int16>, Pointer<Int16>, Pointer<Int16>);
typedef SQLGetDescRecADart = int Function(Pointer<Void>, int, Pointer<Uint8>, int, Pointer<Int16>, Pointer<Int16>, Pointer<Int16>, Pointer<Int32>, Pointer<Int16>, Pointer<Int16>, Pointer<Int16>);
final SQLGetDescRecA = DynamicLibrary.open('ODBC32.dll')
    .lookupFunction<SQLGetDescRecANative, SQLGetDescRecADart>('SQLGetDescRecA');
// hdesc : void* in/out -> Pointer<Void>
// iRecord : SHORT -> Int16
// szName : BYTE* optional, out -> Pointer<Uint8>
// cbNameMax : SHORT -> Int16
// pcbName : SHORT* optional, out -> Pointer<Int16>
// pfType : SHORT* optional, out -> Pointer<Int16>
// pfSubType : SHORT* optional, out -> Pointer<Int16>
// pLength : INT* optional, out -> Pointer<Int32>
// pPrecision : SHORT* optional, out -> Pointer<Int16>
// pScale : SHORT* optional, out -> Pointer<Int16>
// pNullable : SHORT* optional, out -> Pointer<Int16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function SQLGetDescRecA(
  hdesc: Pointer;   // void* in/out
  iRecord: Smallint;   // SHORT
  szName: Pointer;   // BYTE* optional, out
  cbNameMax: Smallint;   // SHORT
  pcbName: Pointer;   // SHORT* optional, out
  pfType: Pointer;   // SHORT* optional, out
  pfSubType: Pointer;   // SHORT* optional, out
  pLength: Pointer;   // INT* optional, out
  pPrecision: Pointer;   // SHORT* optional, out
  pScale: Pointer;   // SHORT* optional, out
  pNullable: Pointer   // SHORT* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetDescRecA';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "SQLGetDescRecA"
  c_SQLGetDescRecA :: Ptr () -> Int16 -> Ptr Word8 -> Int16 -> Ptr Int16 -> Ptr Int16 -> Ptr Int16 -> Ptr Int32 -> Ptr Int16 -> Ptr Int16 -> Ptr Int16 -> IO Int16
-- hdesc : void* in/out -> Ptr ()
-- iRecord : SHORT -> Int16
-- szName : BYTE* optional, out -> Ptr Word8
-- cbNameMax : SHORT -> Int16
-- pcbName : SHORT* optional, out -> Ptr Int16
-- pfType : SHORT* optional, out -> Ptr Int16
-- pfSubType : SHORT* optional, out -> Ptr Int16
-- pLength : INT* optional, out -> Ptr Int32
-- pPrecision : SHORT* optional, out -> Ptr Int16
-- pScale : SHORT* optional, out -> Ptr Int16
-- pNullable : 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 sqlgetdescreca =
  foreign "SQLGetDescRecA"
    ((ptr void) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr int16_t) @-> (ptr int16_t) @-> (ptr int16_t) @-> (ptr int32_t) @-> (ptr int16_t) @-> (ptr int16_t) @-> (ptr int16_t) @-> returning int16_t)
(* hdesc : void* in/out -> (ptr void) *)
(* iRecord : SHORT -> int16_t *)
(* szName : BYTE* optional, out -> (ptr uint8_t) *)
(* cbNameMax : SHORT -> int16_t *)
(* pcbName : SHORT* optional, out -> (ptr int16_t) *)
(* pfType : SHORT* optional, out -> (ptr int16_t) *)
(* pfSubType : SHORT* optional, out -> (ptr int16_t) *)
(* pLength : INT* optional, out -> (ptr int32_t) *)
(* pPrecision : SHORT* optional, out -> (ptr int16_t) *)
(* pScale : SHORT* optional, out -> (ptr int16_t) *)
(* pNullable : 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 ("SQLGetDescRecA" sqlget-desc-rec-a :convention :stdcall) :int16
  (hdesc :pointer)   ; void* in/out
  (i-record :int16)   ; SHORT
  (sz-name :pointer)   ; BYTE* optional, out
  (cb-name-max :int16)   ; SHORT
  (pcb-name :pointer)   ; SHORT* optional, out
  (pf-type :pointer)   ; SHORT* optional, out
  (pf-sub-type :pointer)   ; SHORT* optional, out
  (p-length :pointer)   ; INT* optional, out
  (p-precision :pointer)   ; SHORT* optional, out
  (p-scale :pointer)   ; SHORT* optional, out
  (p-nullable :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 $SQLGetDescRecA = Win32::API::More->new('ODBC32',
    'short SQLGetDescRecA(LPVOID hdesc, short iRecord, LPVOID szName, short cbNameMax, LPVOID pcbName, LPVOID pfType, LPVOID pfSubType, LPVOID pLength, LPVOID pPrecision, LPVOID pScale, LPVOID pNullable)');
# my $ret = $SQLGetDescRecA->Call($hdesc, $iRecord, $szName, $cbNameMax, $pcbName, $pfType, $pfSubType, $pLength, $pPrecision, $pScale, $pNullable);
# hdesc : void* in/out -> LPVOID
# iRecord : SHORT -> short
# szName : BYTE* optional, out -> LPVOID
# cbNameMax : SHORT -> short
# pcbName : SHORT* optional, out -> LPVOID
# pfType : SHORT* optional, out -> LPVOID
# pfSubType : SHORT* optional, out -> LPVOID
# pLength : INT* optional, out -> LPVOID
# pPrecision : SHORT* optional, out -> LPVOID
# pScale : SHORT* optional, out -> LPVOID
# pNullable : 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。

関連項目

文字セット違い