WinHttpReadData

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

BOOL WinHttpReadData(
    void* hRequest,
    void* lpBuffer,
    DWORD dwNumberOfBytesToRead,
    DWORD* lpdwNumberOfBytesRead
);

<DllImport("WINHTTP.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WinHttpReadData(
    hRequest As IntPtr,   ' void* in/out
    lpBuffer As IntPtr,   ' void* out
    dwNumberOfBytesToRead As UInteger,   ' DWORD
    ByRef lpdwNumberOfBytesRead As UInteger   ' DWORD* in/out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' hRequest : void* in/out
' lpBuffer : void* out
' dwNumberOfBytesToRead : DWORD
' lpdwNumberOfBytesRead : DWORD* in/out
Declare PtrSafe Function WinHttpReadData Lib "winhttp" ( _
    ByVal hRequest As LongPtr, _
    ByVal lpBuffer As LongPtr, _
    ByVal dwNumberOfBytesToRead As Long, _
    ByRef lpdwNumberOfBytesRead 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

WinHttpReadData = ctypes.windll.winhttp.WinHttpReadData
WinHttpReadData.restype = wintypes.BOOL
WinHttpReadData.argtypes = [
    ctypes.POINTER(None),  # hRequest : void* in/out
    ctypes.POINTER(None),  # lpBuffer : void* out
    wintypes.DWORD,  # dwNumberOfBytesToRead : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lpdwNumberOfBytesRead : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINHTTP.dll')
WinHttpReadData = Fiddle::Function.new(
  lib['WinHttpReadData'],
  [
    Fiddle::TYPE_VOIDP,  # hRequest : void* in/out
    Fiddle::TYPE_VOIDP,  # lpBuffer : void* out
    -Fiddle::TYPE_INT,  # dwNumberOfBytesToRead : DWORD
    Fiddle::TYPE_VOIDP,  # lpdwNumberOfBytesRead : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "winhttp")]
extern "system" {
    fn WinHttpReadData(
        hRequest: *mut (),  // void* in/out
        lpBuffer: *mut (),  // void* out
        dwNumberOfBytesToRead: u32,  // DWORD
        lpdwNumberOfBytesRead: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WINHTTP.dll", SetLastError = true)]
public static extern bool WinHttpReadData(IntPtr hRequest, IntPtr lpBuffer, uint dwNumberOfBytesToRead, ref uint lpdwNumberOfBytesRead);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINHTTP_WinHttpReadData' -Namespace Win32 -PassThru
# $api::WinHttpReadData(hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead)

#uselib "WINHTTP.dll"
#func global WinHttpReadData "WinHttpReadData" sptr, sptr, sptr, sptr
; WinHttpReadData hRequest, lpBuffer, dwNumberOfBytesToRead, varptr(lpdwNumberOfBytesRead)   ; 戻り値は stat
; hRequest : void* in/out -> "sptr"
; lpBuffer : void* out -> "sptr"
; dwNumberOfBytesToRead : DWORD -> "sptr"
; lpdwNumberOfBytesRead : DWORD* in/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。

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

var (
	winhttp = windows.NewLazySystemDLL("WINHTTP.dll")
	procWinHttpReadData = winhttp.NewProc("WinHttpReadData")
)

// hRequest (void* in/out), lpBuffer (void* out), dwNumberOfBytesToRead (DWORD), lpdwNumberOfBytesRead (DWORD* in/out)
r1, _, err := procWinHttpReadData.Call(
	uintptr(hRequest),
	uintptr(lpBuffer),
	uintptr(dwNumberOfBytesToRead),
	uintptr(lpdwNumberOfBytesRead),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function WinHttpReadData(
  hRequest: Pointer;   // void* in/out
  lpBuffer: Pointer;   // void* out
  dwNumberOfBytesToRead: DWORD;   // DWORD
  lpdwNumberOfBytesRead: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WINHTTP.dll' name 'WinHttpReadData';

result := DllCall("WINHTTP\WinHttpReadData"
    , "Ptr", hRequest   ; void* in/out
    , "Ptr", lpBuffer   ; void* out
    , "UInt", dwNumberOfBytesToRead   ; DWORD
    , "Ptr", lpdwNumberOfBytesRead   ; DWORD* in/out
    , "Int")   ; return: BOOL

●WinHttpReadData(hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead) = DLL("WINHTTP.dll", "bool WinHttpReadData(void*, void*, dword, void*)")
# 呼び出し: WinHttpReadData(hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead)
# hRequest : void* in/out -> "void*"
# lpBuffer : void* out -> "void*"
# dwNumberOfBytesToRead : DWORD -> "dword"
# lpdwNumberOfBytesRead : DWORD* in/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 "winhttp" fn WinHttpReadData(
    hRequest: ?*anyopaque, // void* in/out
    lpBuffer: ?*anyopaque, // void* out
    dwNumberOfBytesToRead: u32, // DWORD
    lpdwNumberOfBytesRead: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) i32;

proc WinHttpReadData(
    hRequest: pointer,  # void* in/out
    lpBuffer: pointer,  # void* out
    dwNumberOfBytesToRead: uint32,  # DWORD
    lpdwNumberOfBytesRead: ptr uint32  # DWORD* in/out
): int32 {.importc: "WinHttpReadData", stdcall, dynlib: "WINHTTP.dll".}

pragma(lib, "winhttp");
extern(Windows)
int WinHttpReadData(
    void* hRequest,   // void* in/out
    void* lpBuffer,   // void* out
    uint dwNumberOfBytesToRead,   // DWORD
    uint* lpdwNumberOfBytesRead   // DWORD* in/out
);

ccall((:WinHttpReadData, "WINHTTP.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{Cvoid}, UInt32, Ptr{UInt32}),
      hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead)
# hRequest : void* in/out -> Ptr{Cvoid}
# lpBuffer : void* out -> Ptr{Cvoid}
# dwNumberOfBytesToRead : DWORD -> UInt32
# lpdwNumberOfBytesRead : DWORD* in/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 WinHttpReadData(
    void* hRequest,
    void* lpBuffer,
    uint32_t dwNumberOfBytesToRead,
    uint32_t* lpdwNumberOfBytesRead);
]]
local winhttp = ffi.load("winhttp")
-- winhttp.WinHttpReadData(hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead)
-- hRequest : void* in/out
-- lpBuffer : void* out
-- dwNumberOfBytesToRead : DWORD
-- lpdwNumberOfBytesRead : DWORD* in/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('WINHTTP.dll');
const WinHttpReadData = lib.func('__stdcall', 'WinHttpReadData', 'int32_t', ['void *', 'void *', 'uint32_t', 'uint32_t *']);
// WinHttpReadData(hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead)
// hRequest : void* in/out -> 'void *'
// lpBuffer : void* out -> 'void *'
// dwNumberOfBytesToRead : DWORD -> 'uint32_t'
// lpdwNumberOfBytesRead : DWORD* in/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("WINHTTP.dll", {
  WinHttpReadData: { parameters: ["pointer", "pointer", "u32", "pointer"], result: "i32" },
});
// lib.symbols.WinHttpReadData(hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead)
// hRequest : void* in/out -> "pointer"
// lpBuffer : void* out -> "pointer"
// dwNumberOfBytesToRead : DWORD -> "u32"
// lpdwNumberOfBytesRead : DWORD* in/out -> "pointer"
// 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
int32_t WinHttpReadData(
    void* hRequest,
    void* lpBuffer,
    uint32_t dwNumberOfBytesToRead,
    uint32_t* lpdwNumberOfBytesRead);
C, "WINHTTP.dll");
// $ffi->WinHttpReadData(hRequest, lpBuffer, dwNumberOfBytesToRead, lpdwNumberOfBytesRead);
// hRequest : void* in/out
// lpBuffer : void* out
// dwNumberOfBytesToRead : DWORD
// lpdwNumberOfBytesRead : DWORD* in/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 Winhttp extends StdCallLibrary {
    Winhttp INSTANCE = Native.load("winhttp", Winhttp.class);
    boolean WinHttpReadData(
        Pointer hRequest,   // void* in/out
        Pointer lpBuffer,   // void* out
        int dwNumberOfBytesToRead,   // DWORD
        IntByReference lpdwNumberOfBytesRead   // DWORD* in/out
    );
}

@[Link("winhttp")]
lib LibWINHTTP
  fun WinHttpReadData = WinHttpReadData(
    hRequest : Void*,   # void* in/out
    lpBuffer : Void*,   # void* out
    dwNumberOfBytesToRead : UInt32,   # DWORD
    lpdwNumberOfBytesRead : UInt32*   # DWORD* in/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 WinHttpReadDataNative = Int32 Function(Pointer<Void>, Pointer<Void>, Uint32, Pointer<Uint32>);
typedef WinHttpReadDataDart = int Function(Pointer<Void>, Pointer<Void>, int, Pointer<Uint32>);
final WinHttpReadData = DynamicLibrary.open('WINHTTP.dll')
    .lookupFunction<WinHttpReadDataNative, WinHttpReadDataDart>('WinHttpReadData');
// hRequest : void* in/out -> Pointer<Void>
// lpBuffer : void* out -> Pointer<Void>
// dwNumberOfBytesToRead : DWORD -> Uint32
// lpdwNumberOfBytesRead : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WinHttpReadData(
  hRequest: Pointer;   // void* in/out
  lpBuffer: Pointer;   // void* out
  dwNumberOfBytesToRead: DWORD;   // DWORD
  lpdwNumberOfBytesRead: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WINHTTP.dll' name 'WinHttpReadData';

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

foreign import stdcall safe "WinHttpReadData"
  c_WinHttpReadData :: Ptr () -> Ptr () -> Word32 -> Ptr Word32 -> IO CInt
-- hRequest : void* in/out -> Ptr ()
-- lpBuffer : void* out -> Ptr ()
-- dwNumberOfBytesToRead : DWORD -> Word32
-- lpdwNumberOfBytesRead : DWORD* in/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 winhttpreaddata =
  foreign "WinHttpReadData"
    ((ptr void) @-> (ptr void) @-> uint32_t @-> (ptr uint32_t) @-> returning int32_t)
(* hRequest : void* in/out -> (ptr void) *)
(* lpBuffer : void* out -> (ptr void) *)
(* dwNumberOfBytesToRead : DWORD -> uint32_t *)
(* lpdwNumberOfBytesRead : DWORD* in/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 winhttp (t "WINHTTP.dll"))
(cffi:use-foreign-library winhttp)

(cffi:defcfun ("WinHttpReadData" win-http-read-data :convention :stdcall) :int32
  (h-request :pointer)   ; void* in/out
  (lp-buffer :pointer)   ; void* out
  (dw-number-of-bytes-to-read :uint32)   ; DWORD
  (lpdw-number-of-bytes-read :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WinHttpReadData = Win32::API::More->new('WINHTTP',
    'BOOL WinHttpReadData(LPVOID hRequest, LPVOID lpBuffer, DWORD dwNumberOfBytesToRead, LPVOID lpdwNumberOfBytesRead)');
# my $ret = $WinHttpReadData->Call($hRequest, $lpBuffer, $dwNumberOfBytesToRead, $lpdwNumberOfBytesRead);
# hRequest : void* in/out -> LPVOID
# lpBuffer : void* out -> LPVOID
# dwNumberOfBytesToRead : DWORD -> DWORD
# lpdwNumberOfBytesRead : DWORD* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。