uldn_openForContext

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

ULocaleDisplayNames* uldn_openForContext(
    LPCSTR locale,
    UDisplayContext* contexts,
    INT length,
    UErrorCode* pErrorCode
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function uldn_openForContext(
    <MarshalAs(UnmanagedType.LPStr)> locale As String,   ' LPCSTR
    ByRef contexts As Integer,   ' UDisplayContext* in/out
    length As Integer,   ' INT
    ByRef pErrorCode As Integer   ' UErrorCode* in/out
) As IntPtr
End Function

' locale : LPCSTR
' contexts : UDisplayContext* in/out
' length : INT
' pErrorCode : UErrorCode* in/out
Declare PtrSafe Function uldn_openForContext Lib "icuuc" ( _
    ByVal locale As String, _
    ByRef contexts As Long, _
    ByVal length As Long, _
    ByRef pErrorCode As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

uldn_openForContext = ctypes.cdll.icuuc.uldn_openForContext
uldn_openForContext.restype = ctypes.c_void_p
uldn_openForContext.argtypes = [
    wintypes.LPCSTR,  # locale : LPCSTR
    ctypes.c_void_p,  # contexts : UDisplayContext* in/out
    ctypes.c_int,  # length : INT
    ctypes.c_void_p,  # pErrorCode : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
uldn_openForContext = Fiddle::Function.new(
  lib['uldn_openForContext'],
  [
    Fiddle::TYPE_VOIDP,  # locale : LPCSTR
    Fiddle::TYPE_VOIDP,  # contexts : UDisplayContext* in/out
    Fiddle::TYPE_INT,  # length : INT
    Fiddle::TYPE_VOIDP,  # pErrorCode : UErrorCode* in/out
  ],
  Fiddle::TYPE_VOIDP, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn uldn_openForContext(
        locale: *const u8,  // LPCSTR
        contexts: *mut i32,  // UDisplayContext* in/out
        length: i32,  // INT
        pErrorCode: *mut i32  // UErrorCode* in/out
    ) -> *mut isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr uldn_openForContext([MarshalAs(UnmanagedType.LPStr)] string locale, ref int contexts, int length, ref int pErrorCode);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_uldn_openForContext' -Namespace Win32 -PassThru
# $api::uldn_openForContext(locale, contexts, length, pErrorCode)

#uselib "icuuc.dll"
#func global uldn_openForContext "uldn_openForContext" sptr, sptr, sptr, sptr
; uldn_openForContext locale, varptr(contexts), length, varptr(pErrorCode)   ; 戻り値は stat
; locale : LPCSTR -> "sptr"
; contexts : UDisplayContext* in/out -> "sptr"
; length : INT -> "sptr"
; pErrorCode : UErrorCode* 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 (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	proculdn_openForContext = icuuc.NewProc("uldn_openForContext")
)

// locale (LPCSTR), contexts (UDisplayContext* in/out), length (INT), pErrorCode (UErrorCode* in/out)
r1, _, err := proculdn_openForContext.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(locale))),
	uintptr(contexts),
	uintptr(length),
	uintptr(pErrorCode),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // ULocaleDisplayNames*

function uldn_openForContext(
  locale: PAnsiChar;   // LPCSTR
  contexts: Pointer;   // UDisplayContext* in/out
  length: Integer;   // INT
  pErrorCode: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'uldn_openForContext';

result := DllCall("icuuc\uldn_openForContext"
    , "AStr", locale   ; LPCSTR
    , "Ptr", contexts   ; UDisplayContext* in/out
    , "Int", length   ; INT
    , "Ptr", pErrorCode   ; UErrorCode* in/out
    , "Cdecl Ptr")   ; return: ULocaleDisplayNames*

●uldn_openForContext(locale, contexts, length, pErrorCode) = DLL("icuuc.dll", "void* uldn_openForContext(char*, void*, int, void*)")
# 呼び出し: uldn_openForContext(locale, contexts, length, pErrorCode)
# locale : LPCSTR -> "char*"
# contexts : UDisplayContext* in/out -> "void*"
# length : INT -> "int"
# pErrorCode : UErrorCode* 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)。
# ※cdecl関数。DLL()宣言はstdcall前提。cdeclは EXEC_PTR(`cdecl`,…) を使用。

const std = @import("std");

extern "icuuc" fn uldn_openForContext(
    locale: [*c]const u8, // LPCSTR
    contexts: [*c]i32, // UDisplayContext* in/out
    length: i32, // INT
    pErrorCode: [*c]i32 // UErrorCode* in/out
) callconv(.c) [*c]isize;

proc uldn_openForContext(
    locale: cstring,  # LPCSTR
    contexts: ptr int32,  # UDisplayContext* in/out
    length: int32,  # INT
    pErrorCode: ptr int32  # UErrorCode* in/out
): ptr int {.importc: "uldn_openForContext", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
ptrdiff_t* uldn_openForContext(
    const(char)* locale,   // LPCSTR
    int* contexts,   // UDisplayContext* in/out
    int length,   // INT
    int* pErrorCode   // UErrorCode* in/out
);

ccall((:uldn_openForContext, "icuuc.dll"), Ptr{Int},
      (Cstring, Ptr{Int32}, Int32, Ptr{Int32}),
      locale, contexts, length, pErrorCode)
# locale : LPCSTR -> Cstring
# contexts : UDisplayContext* in/out -> Ptr{Int32}
# length : INT -> Int32
# pErrorCode : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
intptr_t* uldn_openForContext(
    const char* locale,
    int32_t* contexts,
    int32_t length,
    int32_t* pErrorCode);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.uldn_openForContext(locale, contexts, length, pErrorCode)
-- locale : LPCSTR
-- contexts : UDisplayContext* in/out
-- length : INT
-- pErrorCode : UErrorCode* 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('icuuc.dll');
const uldn_openForContext = lib.func('__cdecl', 'uldn_openForContext', 'intptr_t *', ['str', 'int32_t *', 'int32_t', 'int32_t *']);
// uldn_openForContext(locale, contexts, length, pErrorCode)
// locale : LPCSTR -> 'str'
// contexts : UDisplayContext* in/out -> 'int32_t *'
// length : INT -> 'int32_t'
// pErrorCode : UErrorCode* in/out -> 'int32_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("icuuc.dll", {
  uldn_openForContext: { parameters: ["buffer", "pointer", "i32", "pointer"], result: "pointer" },
});
// lib.symbols.uldn_openForContext(locale, contexts, length, pErrorCode)
// locale : LPCSTR -> "buffer"
// contexts : UDisplayContext* in/out -> "pointer"
// length : INT -> "i32"
// pErrorCode : UErrorCode* 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
intptr_t* uldn_openForContext(
    const char* locale,
    int32_t* contexts,
    int32_t length,
    int32_t* pErrorCode);
C, "icuuc.dll");
// $ffi->uldn_openForContext(locale, contexts, length, pErrorCode);
// locale : LPCSTR
// contexts : UDisplayContext* in/out
// length : INT
// pErrorCode : UErrorCode* 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。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Icuuc extends Library {
    Icuuc INSTANCE = Native.load("icuuc", Icuuc.class);
    Pointer uldn_openForContext(
        String locale,   // LPCSTR
        IntByReference contexts,   // UDisplayContext* in/out
        int length,   // INT
        IntByReference pErrorCode   // UErrorCode* in/out
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun uldn_openForContext = uldn_openForContext(
    locale : UInt8*,   # LPCSTR
    contexts : Int32*,   # UDisplayContext* in/out
    length : Int32,   # INT
    pErrorCode : Int32*   # UErrorCode* in/out
  ) : LibC::SSizeT*
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef uldn_openForContextNative = Pointer<IntPtr> Function(Pointer<Utf8>, Pointer<Int32>, Int32, Pointer<Int32>);
typedef uldn_openForContextDart = Pointer<IntPtr> Function(Pointer<Utf8>, Pointer<Int32>, int, Pointer<Int32>);
final uldn_openForContext = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<uldn_openForContextNative, uldn_openForContextDart>('uldn_openForContext');
// locale : LPCSTR -> Pointer<Utf8>
// contexts : UDisplayContext* in/out -> Pointer<Int32>
// length : INT -> Int32
// pErrorCode : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function uldn_openForContext(
  locale: PAnsiChar;   // LPCSTR
  contexts: Pointer;   // UDisplayContext* in/out
  length: Integer;   // INT
  pErrorCode: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'uldn_openForContext';

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

foreign import ccall safe "uldn_openForContext"
  c_uldn_openForContext :: CString -> Ptr Int32 -> Int32 -> Ptr Int32 -> IO (Ptr CIntPtr)
-- locale : LPCSTR -> CString
-- contexts : UDisplayContext* in/out -> Ptr Int32
-- length : INT -> Int32
-- pErrorCode : UErrorCode* in/out -> Ptr Int32
-- 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 uldn_openforcontext =
  foreign "uldn_openForContext"
    (string @-> (ptr int32_t) @-> int32_t @-> (ptr int32_t) @-> returning (ptr intptr_t))
(* locale : LPCSTR -> string *)
(* contexts : UDisplayContext* in/out -> (ptr int32_t) *)
(* length : INT -> int32_t *)
(* pErrorCode : UErrorCode* in/out -> (ptr int32_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 icuuc (t "icuuc.dll"))
(cffi:use-foreign-library icuuc)

(cffi:defcfun ("uldn_openForContext" uldn-open-for-context :convention :cdecl) :pointer
  (locale :string)   ; LPCSTR
  (contexts :pointer)   ; UDisplayContext* in/out
  (length :int32)   ; INT
  (p-error-code :pointer))   ; UErrorCode* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $uldn_openForContext = Win32::API::More->new('icuuc',
    'LPVOID uldn_openForContext(LPCSTR locale, LPVOID contexts, int length, LPVOID pErrorCode)');
# my $ret = $uldn_openForContext->Call($locale, $contexts, $length, $pErrorCode);
# locale : LPCSTR -> LPCSTR
# contexts : UDisplayContext* in/out -> LPVOID
# length : INT -> int
# pErrorCode : UErrorCode* 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。