HttpGetExtension

// HTTPAPI.dll
#include <windows.h>

DWORD HttpGetExtension(
    HTTPAPI_VERSION Version,
    DWORD Extension,
    void* Buffer,
    DWORD BufferSize
);

<DllImport("HTTPAPI.dll", ExactSpelling:=True)>
Public Shared Function HttpGetExtension(
    Version As HTTPAPI_VERSION,   ' HTTPAPI_VERSION
    Extension As UInteger,   ' DWORD
    Buffer As IntPtr,   ' void* out
    BufferSize As UInteger   ' DWORD
) As UInteger
End Function

' Version : HTTPAPI_VERSION
' Extension : DWORD
' Buffer : void* out
' BufferSize : DWORD
Declare PtrSafe Function HttpGetExtension Lib "httpapi" ( _
    ByVal Version As LongPtr, _
    ByVal Extension As Long, _
    ByVal Buffer As LongPtr, _
    ByVal BufferSize 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

HttpGetExtension = ctypes.windll.httpapi.HttpGetExtension
HttpGetExtension.restype = wintypes.DWORD
HttpGetExtension.argtypes = [
    HTTPAPI_VERSION,  # Version : HTTPAPI_VERSION
    wintypes.DWORD,  # Extension : DWORD
    ctypes.POINTER(None),  # Buffer : void* out
    wintypes.DWORD,  # BufferSize : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('HTTPAPI.dll')
HttpGetExtension = Fiddle::Function.new(
  lib['HttpGetExtension'],
  [
    Fiddle::TYPE_VOIDP,  # Version : HTTPAPI_VERSION
    -Fiddle::TYPE_INT,  # Extension : DWORD
    Fiddle::TYPE_VOIDP,  # Buffer : void* out
    -Fiddle::TYPE_INT,  # BufferSize : DWORD
  ],
  -Fiddle::TYPE_INT)

#[link(name = "httpapi")]
extern "system" {
    fn HttpGetExtension(
        Version: HTTPAPI_VERSION,  // HTTPAPI_VERSION
        Extension: u32,  // DWORD
        Buffer: *mut (),  // void* out
        BufferSize: u32  // DWORD
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("HTTPAPI.dll")]
public static extern uint HttpGetExtension(HTTPAPI_VERSION Version, uint Extension, IntPtr Buffer, uint BufferSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'HTTPAPI_HttpGetExtension' -Namespace Win32 -PassThru
# $api::HttpGetExtension(Version, Extension, Buffer, BufferSize)

#uselib "HTTPAPI.dll"
#func global HttpGetExtension "HttpGetExtension" sptr, sptr, sptr, sptr
; HttpGetExtension Version, Extension, Buffer, BufferSize   ; 戻り値は stat
; Version : HTTPAPI_VERSION -> "sptr"
; Extension : DWORD -> "sptr"
; Buffer : void* out -> "sptr"
; BufferSize : DWORD -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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。

#uselib "HTTPAPI.dll"
#cfunc global HttpGetExtension "HttpGetExtension" int, int, sptr, int
; res = HttpGetExtension(Version, Extension, Buffer, BufferSize)
; Version : HTTPAPI_VERSION -> "int"
; Extension : DWORD -> "int"
; Buffer : void* out -> "sptr"
; BufferSize : DWORD -> "int"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。

; DWORD HttpGetExtension(HTTPAPI_VERSION Version, DWORD Extension, void* Buffer, DWORD BufferSize)
#uselib "HTTPAPI.dll"
#cfunc global HttpGetExtension "HttpGetExtension" int, int, intptr, int
; res = HttpGetExtension(Version, Extension, Buffer, BufferSize)
; Version : HTTPAPI_VERSION -> "int"
; Extension : DWORD -> "int"
; Buffer : void* out -> "intptr"
; BufferSize : DWORD -> "int"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	httpapi = windows.NewLazySystemDLL("HTTPAPI.dll")
	procHttpGetExtension = httpapi.NewProc("HttpGetExtension")
)

// Version (HTTPAPI_VERSION), Extension (DWORD), Buffer (void* out), BufferSize (DWORD)
r1, _, err := procHttpGetExtension.Call(
	uintptr(Version),
	uintptr(Extension),
	uintptr(Buffer),
	uintptr(BufferSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function HttpGetExtension(
  Version: HTTPAPI_VERSION;   // HTTPAPI_VERSION
  Extension: DWORD;   // DWORD
  Buffer: Pointer;   // void* out
  BufferSize: DWORD   // DWORD
): DWORD; stdcall;
  external 'HTTPAPI.dll' name 'HttpGetExtension';

result := DllCall("HTTPAPI\HttpGetExtension"
    , "Ptr", Version   ; HTTPAPI_VERSION
    , "UInt", Extension   ; DWORD
    , "Ptr", Buffer   ; void* out
    , "UInt", BufferSize   ; DWORD
    , "UInt")   ; return: DWORD

●HttpGetExtension(Version, Extension, Buffer, BufferSize) = DLL("HTTPAPI.dll", "dword HttpGetExtension(void*, dword, void*, dword)")
# 呼び出し: HttpGetExtension(Version, Extension, Buffer, BufferSize)
# Version : HTTPAPI_VERSION -> "void*"
# Extension : DWORD -> "dword"
# Buffer : void* out -> "void*"
# BufferSize : 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 "httpapi" fn HttpGetExtension(
    Version: HTTPAPI_VERSION, // HTTPAPI_VERSION
    Extension: u32, // DWORD
    Buffer: ?*anyopaque, // void* out
    BufferSize: u32 // DWORD
) callconv(std.os.windows.WINAPI) u32;

proc HttpGetExtension(
    Version: HTTPAPI_VERSION,  # HTTPAPI_VERSION
    Extension: uint32,  # DWORD
    Buffer: pointer,  # void* out
    BufferSize: uint32  # DWORD
): uint32 {.importc: "HttpGetExtension", stdcall, dynlib: "HTTPAPI.dll".}

pragma(lib, "httpapi");
extern(Windows)
uint HttpGetExtension(
    HTTPAPI_VERSION Version,   // HTTPAPI_VERSION
    uint Extension,   // DWORD
    void* Buffer,   // void* out
    uint BufferSize   // DWORD
);

ccall((:HttpGetExtension, "HTTPAPI.dll"), stdcall, UInt32,
      (HTTPAPI_VERSION, UInt32, Ptr{Cvoid}, UInt32),
      Version, Extension, Buffer, BufferSize)
# Version : HTTPAPI_VERSION -> HTTPAPI_VERSION
# Extension : DWORD -> UInt32
# Buffer : void* out -> Ptr{Cvoid}
# BufferSize : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t HttpGetExtension(
    HTTPAPI_VERSION Version,
    uint32_t Extension,
    void* Buffer,
    uint32_t BufferSize);
]]
local httpapi = ffi.load("httpapi")
-- httpapi.HttpGetExtension(Version, Extension, Buffer, BufferSize)
-- Version : HTTPAPI_VERSION
-- Extension : DWORD
-- Buffer : void* out
-- BufferSize : 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('HTTPAPI.dll');
const HttpGetExtension = lib.func('__stdcall', 'HttpGetExtension', 'uint32_t', ['HTTPAPI_VERSION', 'uint32_t', 'void *', 'uint32_t']);
// HttpGetExtension(Version, Extension, Buffer, BufferSize)
// Version : HTTPAPI_VERSION -> 'HTTPAPI_VERSION'
// Extension : DWORD -> 'uint32_t'
// Buffer : void* out -> 'void *'
// BufferSize : 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("HTTPAPI.dll", {
  HttpGetExtension: { parameters: ["buffer", "u32", "pointer", "u32"], result: "u32" },
});
// lib.symbols.HttpGetExtension(Version, Extension, Buffer, BufferSize)
// Version : HTTPAPI_VERSION -> "buffer"
// Extension : DWORD -> "u32"
// Buffer : void* out -> "pointer"
// BufferSize : DWORD -> "u32"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t HttpGetExtension(
    HTTPAPI_VERSION Version,
    uint32_t Extension,
    void* Buffer,
    uint32_t BufferSize);
C, "HTTPAPI.dll");
// $ffi->HttpGetExtension(Version, Extension, Buffer, BufferSize);
// Version : HTTPAPI_VERSION
// Extension : DWORD
// Buffer : void* out
// BufferSize : 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 Httpapi extends StdCallLibrary {
    Httpapi INSTANCE = Native.load("httpapi", Httpapi.class);
    int HttpGetExtension(
        HTTPAPI_VERSION /* extends Structure (by value) */ Version,   // HTTPAPI_VERSION
        int Extension,   // DWORD
        Pointer Buffer,   // void* out
        int BufferSize   // DWORD
    );
}

@[Link("httpapi")]
lib LibHTTPAPI
  fun HttpGetExtension = HttpGetExtension(
    Version : HTTPAPI_VERSION,   # HTTPAPI_VERSION
    Extension : UInt32,   # DWORD
    Buffer : Void*,   # void* out
    BufferSize : UInt32   # DWORD
  ) : UInt32
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 HttpGetExtensionNative = Uint32 Function(HTTPAPI_VERSION, Uint32, Pointer<Void>, Uint32);
typedef HttpGetExtensionDart = int Function(int, int, Pointer<Void>, int);
final HttpGetExtension = DynamicLibrary.open('HTTPAPI.dll')
    .lookupFunction<HttpGetExtensionNative, HttpGetExtensionDart>('HttpGetExtension');
// Version : HTTPAPI_VERSION -> HTTPAPI_VERSION
// Extension : DWORD -> Uint32
// Buffer : void* out -> Pointer<Void>
// BufferSize : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function HttpGetExtension(
  Version: HTTPAPI_VERSION;   // HTTPAPI_VERSION
  Extension: DWORD;   // DWORD
  Buffer: Pointer;   // void* out
  BufferSize: DWORD   // DWORD
): DWORD; stdcall;
  external 'HTTPAPI.dll' name 'HttpGetExtension';

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

foreign import stdcall safe "HttpGetExtension"
  c_HttpGetExtension :: HTTPAPI_VERSION -> Word32 -> Ptr () -> Word32 -> IO Word32
-- Version : HTTPAPI_VERSION -> HTTPAPI_VERSION
-- Extension : DWORD -> Word32
-- Buffer : void* out -> Ptr ()
-- BufferSize : 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。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let httpgetextension =
  foreign "HttpGetExtension"
    (HTTPAPI_VERSION @-> uint32_t @-> (ptr void) @-> uint32_t @-> returning uint32_t)
(* Version : HTTPAPI_VERSION -> HTTPAPI_VERSION *)
(* Extension : DWORD -> uint32_t *)
(* Buffer : void* out -> (ptr void) *)
(* BufferSize : 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 httpapi (t "HTTPAPI.dll"))
(cffi:use-foreign-library httpapi)

(cffi:defcfun ("HttpGetExtension" http-get-extension :convention :stdcall) :uint32
  (version (:struct httpapi-version))   ; HTTPAPI_VERSION
  (extension :uint32)   ; DWORD
  (buffer :pointer)   ; void* out
  (buffer-size :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $HttpGetExtension = Win32::API::More->new('HTTPAPI',
    'DWORD HttpGetExtension(LPVOID Version, DWORD Extension, LPVOID Buffer, DWORD BufferSize)');
# my $ret = $HttpGetExtension->Call($Version, $Extension, $Buffer, $BufferSize);
# Version : HTTPAPI_VERSION -> LPVOID
# Extension : DWORD -> DWORD
# Buffer : void* out -> LPVOID
# BufferSize : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。