WsReadChars

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

HRESULT WsReadChars(
    WS_XML_READER* reader,
    LPWSTR chars,
    DWORD maxCharCount,
    DWORD* actualCharCount,
    WS_ERROR* error   // optional
);

<DllImport("webservices.dll", ExactSpelling:=True)>
Public Shared Function WsReadChars(
    ByRef reader As IntPtr,   ' WS_XML_READER*
    <MarshalAs(UnmanagedType.LPWStr)> chars As System.Text.StringBuilder,   ' LPWSTR out
    maxCharCount As UInteger,   ' DWORD
    <Out> ByRef actualCharCount As UInteger,   ' DWORD* out
    [error] As IntPtr   ' WS_ERROR* optional
) As Integer
End Function

' reader : WS_XML_READER*
' chars : LPWSTR out
' maxCharCount : DWORD
' actualCharCount : DWORD* out
' error : WS_ERROR* optional
Declare PtrSafe Function WsReadChars Lib "webservices" ( _
    ByRef reader As LongPtr, _
    ByVal chars As LongPtr, _
    ByVal maxCharCount As Long, _
    ByRef actualCharCount As Long, _
    ByVal error As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WsReadChars = ctypes.windll.webservices.WsReadChars
WsReadChars.restype = ctypes.c_int
WsReadChars.argtypes = [
    ctypes.c_void_p,  # reader : WS_XML_READER*
    wintypes.LPWSTR,  # chars : LPWSTR out
    wintypes.DWORD,  # maxCharCount : DWORD
    ctypes.POINTER(wintypes.DWORD),  # actualCharCount : DWORD* out
    ctypes.c_void_p,  # error : WS_ERROR* optional
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('webservices.dll')
WsReadChars = Fiddle::Function.new(
  lib['WsReadChars'],
  [
    Fiddle::TYPE_VOIDP,  # reader : WS_XML_READER*
    Fiddle::TYPE_VOIDP,  # chars : LPWSTR out
    -Fiddle::TYPE_INT,  # maxCharCount : DWORD
    Fiddle::TYPE_VOIDP,  # actualCharCount : DWORD* out
    Fiddle::TYPE_VOIDP,  # error : WS_ERROR* optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "webservices")]
extern "system" {
    fn WsReadChars(
        reader: *mut isize,  // WS_XML_READER*
        chars: *mut u16,  // LPWSTR out
        maxCharCount: u32,  // DWORD
        actualCharCount: *mut u32,  // DWORD* out
        error: *mut isize  // WS_ERROR* optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("webservices.dll")]
public static extern int WsReadChars(ref IntPtr reader, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder chars, uint maxCharCount, out uint actualCharCount, IntPtr error);
"@
$api = Add-Type -MemberDefinition $sig -Name 'webservices_WsReadChars' -Namespace Win32 -PassThru
# $api::WsReadChars(reader, chars, maxCharCount, actualCharCount, error)

#uselib "webservices.dll"
#func global WsReadChars "WsReadChars" sptr, sptr, sptr, sptr, sptr
; WsReadChars varptr(reader), varptr(chars), maxCharCount, varptr(actualCharCount), varptr(error)   ; 戻り値は stat
; reader : WS_XML_READER* -> "sptr"
; chars : LPWSTR out -> "sptr"
; maxCharCount : DWORD -> "sptr"
; actualCharCount : DWORD* out -> "sptr"
; error : WS_ERROR* optional -> "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 (
	webservices = windows.NewLazySystemDLL("webservices.dll")
	procWsReadChars = webservices.NewProc("WsReadChars")
)

// reader (WS_XML_READER*), chars (LPWSTR out), maxCharCount (DWORD), actualCharCount (DWORD* out), error (WS_ERROR* optional)
r1, _, err := procWsReadChars.Call(
	uintptr(reader),
	uintptr(chars),
	uintptr(maxCharCount),
	uintptr(actualCharCount),
	uintptr(error),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function WsReadChars(
  reader: Pointer;   // WS_XML_READER*
  chars: PWideChar;   // LPWSTR out
  maxCharCount: DWORD;   // DWORD
  actualCharCount: Pointer;   // DWORD* out
  error: Pointer   // WS_ERROR* optional
): Integer; stdcall;
  external 'webservices.dll' name 'WsReadChars';

result := DllCall("webservices\WsReadChars"
    , "Ptr", reader   ; WS_XML_READER*
    , "Ptr", chars   ; LPWSTR out
    , "UInt", maxCharCount   ; DWORD
    , "Ptr", actualCharCount   ; DWORD* out
    , "Ptr", error   ; WS_ERROR* optional
    , "Int")   ; return: HRESULT

●WsReadChars(reader, chars, maxCharCount, actualCharCount, error) = DLL("webservices.dll", "int WsReadChars(void*, char*, dword, void*, void*)")
# 呼び出し: WsReadChars(reader, chars, maxCharCount, actualCharCount, error)
# reader : WS_XML_READER* -> "void*"
# chars : LPWSTR out -> "char*"
# maxCharCount : DWORD -> "dword"
# actualCharCount : DWORD* out -> "void*"
# error : WS_ERROR* optional -> "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 "webservices" fn WsReadChars(
    reader: [*c]isize, // WS_XML_READER*
    chars: [*c]u16, // LPWSTR out
    maxCharCount: u32, // DWORD
    actualCharCount: [*c]u32, // DWORD* out
    error: [*c]isize // WS_ERROR* optional
) callconv(std.os.windows.WINAPI) i32;

proc WsReadChars(
    reader: ptr int,  # WS_XML_READER*
    chars: ptr uint16,  # LPWSTR out
    maxCharCount: uint32,  # DWORD
    actualCharCount: ptr uint32,  # DWORD* out
    error: ptr int  # WS_ERROR* optional
): int32 {.importc: "WsReadChars", stdcall, dynlib: "webservices.dll".}

pragma(lib, "webservices");
extern(Windows)
int WsReadChars(
    ptrdiff_t* reader,   // WS_XML_READER*
    wchar* chars,   // LPWSTR out
    uint maxCharCount,   // DWORD
    uint* actualCharCount,   // DWORD* out
    ptrdiff_t* error   // WS_ERROR* optional
);

ccall((:WsReadChars, "webservices.dll"), stdcall, Int32,
      (Ptr{Int}, Ptr{UInt16}, UInt32, Ptr{UInt32}, Ptr{Int}),
      reader, chars, maxCharCount, actualCharCount, error)
# reader : WS_XML_READER* -> Ptr{Int}
# chars : LPWSTR out -> Ptr{UInt16}
# maxCharCount : DWORD -> UInt32
# actualCharCount : DWORD* out -> Ptr{UInt32}
# error : WS_ERROR* optional -> Ptr{Int}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t WsReadChars(
    intptr_t* reader,
    uint16_t* chars,
    uint32_t maxCharCount,
    uint32_t* actualCharCount,
    intptr_t* error);
]]
local webservices = ffi.load("webservices")
-- webservices.WsReadChars(reader, chars, maxCharCount, actualCharCount, error)
-- reader : WS_XML_READER*
-- chars : LPWSTR out
-- maxCharCount : DWORD
-- actualCharCount : DWORD* out
-- error : WS_ERROR* optional
-- 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('webservices.dll');
const WsReadChars = lib.func('__stdcall', 'WsReadChars', 'int32_t', ['intptr_t *', 'uint16_t *', 'uint32_t', 'uint32_t *', 'intptr_t *']);
// WsReadChars(reader, chars, maxCharCount, actualCharCount, error)
// reader : WS_XML_READER* -> 'intptr_t *'
// chars : LPWSTR out -> 'uint16_t *'
// maxCharCount : DWORD -> 'uint32_t'
// actualCharCount : DWORD* out -> 'uint32_t *'
// error : WS_ERROR* optional -> 'intptr_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("webservices.dll", {
  WsReadChars: { parameters: ["pointer", "buffer", "u32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.WsReadChars(reader, chars, maxCharCount, actualCharCount, error)
// reader : WS_XML_READER* -> "pointer"
// chars : LPWSTR out -> "buffer"
// maxCharCount : DWORD -> "u32"
// actualCharCount : DWORD* out -> "pointer"
// error : WS_ERROR* optional -> "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 WsReadChars(
    intptr_t* reader,
    uint16_t* chars,
    uint32_t maxCharCount,
    uint32_t* actualCharCount,
    intptr_t* error);
C, "webservices.dll");
// $ffi->WsReadChars(reader, chars, maxCharCount, actualCharCount, error);
// reader : WS_XML_READER*
// chars : LPWSTR out
// maxCharCount : DWORD
// actualCharCount : DWORD* out
// error : WS_ERROR* optional
// 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 Webservices extends StdCallLibrary {
    Webservices INSTANCE = Native.load("webservices", Webservices.class);
    int WsReadChars(
        LongByReference reader,   // WS_XML_READER*
        char[] chars,   // LPWSTR out
        int maxCharCount,   // DWORD
        IntByReference actualCharCount,   // DWORD* out
        LongByReference error   // WS_ERROR* optional
    );
}

@[Link("webservices")]
lib Libwebservices
  fun WsReadChars = WsReadChars(
    reader : LibC::SSizeT*,   # WS_XML_READER*
    chars : UInt16*,   # LPWSTR out
    maxCharCount : UInt32,   # DWORD
    actualCharCount : UInt32*,   # DWORD* out
    error : LibC::SSizeT*   # WS_ERROR* optional
  ) : 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 WsReadCharsNative = Int32 Function(Pointer<IntPtr>, Pointer<Utf16>, Uint32, Pointer<Uint32>, Pointer<IntPtr>);
typedef WsReadCharsDart = int Function(Pointer<IntPtr>, Pointer<Utf16>, int, Pointer<Uint32>, Pointer<IntPtr>);
final WsReadChars = DynamicLibrary.open('webservices.dll')
    .lookupFunction<WsReadCharsNative, WsReadCharsDart>('WsReadChars');
// reader : WS_XML_READER* -> Pointer<IntPtr>
// chars : LPWSTR out -> Pointer<Utf16>
// maxCharCount : DWORD -> Uint32
// actualCharCount : DWORD* out -> Pointer<Uint32>
// error : WS_ERROR* optional -> Pointer<IntPtr>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WsReadChars(
  reader: Pointer;   // WS_XML_READER*
  chars: PWideChar;   // LPWSTR out
  maxCharCount: DWORD;   // DWORD
  actualCharCount: Pointer;   // DWORD* out
  error: Pointer   // WS_ERROR* optional
): Integer; stdcall;
  external 'webservices.dll' name 'WsReadChars';

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

foreign import stdcall safe "WsReadChars"
  c_WsReadChars :: Ptr CIntPtr -> CWString -> Word32 -> Ptr Word32 -> Ptr CIntPtr -> IO Int32
-- reader : WS_XML_READER* -> Ptr CIntPtr
-- chars : LPWSTR out -> CWString
-- maxCharCount : DWORD -> Word32
-- actualCharCount : DWORD* out -> Ptr Word32
-- error : WS_ERROR* optional -> Ptr CIntPtr
-- 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 wsreadchars =
  foreign "WsReadChars"
    ((ptr intptr_t) @-> (ptr uint16_t) @-> uint32_t @-> (ptr uint32_t) @-> (ptr intptr_t) @-> returning int32_t)
(* reader : WS_XML_READER* -> (ptr intptr_t) *)
(* chars : LPWSTR out -> (ptr uint16_t) *)
(* maxCharCount : DWORD -> uint32_t *)
(* actualCharCount : DWORD* out -> (ptr uint32_t) *)
(* error : WS_ERROR* optional -> (ptr intptr_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 webservices (t "webservices.dll"))
(cffi:use-foreign-library webservices)

(cffi:defcfun ("WsReadChars" ws-read-chars :convention :stdcall) :int32
  (reader :pointer)   ; WS_XML_READER*
  (chars :pointer)   ; LPWSTR out
  (max-char-count :uint32)   ; DWORD
  (actual-char-count :pointer)   ; DWORD* out
  (error :pointer))   ; WS_ERROR* optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WsReadChars = Win32::API::More->new('webservices',
    'int WsReadChars(LPVOID reader, LPWSTR chars, DWORD maxCharCount, LPVOID actualCharCount, LPVOID error)');
# my $ret = $WsReadChars->Call($reader, $chars, $maxCharCount, $actualCharCount, $error);
# reader : WS_XML_READER* -> LPVOID
# chars : LPWSTR out -> LPWSTR
# maxCharCount : DWORD -> DWORD
# actualCharCount : DWORD* out -> LPVOID
# error : WS_ERROR* optional -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。