udat_getContext

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

UDisplayContext udat_getContext(
    const void** fmt,
    UDisplayContextType type,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udat_getContext(
    fmt As IntPtr,   ' void**
    type As Integer,   ' UDisplayContextType
    ByRef status As Integer   ' UErrorCode* in/out
) As Integer
End Function

' fmt : void**
' type : UDisplayContextType
' status : UErrorCode* in/out
Declare PtrSafe Function udat_getContext Lib "icuin" ( _
    ByVal fmt As LongPtr, _
    ByVal type As Long, _
    ByRef status 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

udat_getContext = ctypes.cdll.icuin.udat_getContext
udat_getContext.restype = ctypes.c_int
udat_getContext.argtypes = [
    ctypes.c_void_p,  # fmt : void**
    ctypes.c_int,  # type : UDisplayContextType
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_getContext = Fiddle::Function.new(
  lib['udat_getContext'],
  [
    Fiddle::TYPE_VOIDP,  # fmt : void**
    Fiddle::TYPE_INT,  # type : UDisplayContextType
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udat_getContext(
        fmt: *const *const (),  // void**
        type: i32,  // UDisplayContextType
        status: *mut i32  // UErrorCode* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int udat_getContext(IntPtr fmt, int type, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udat_getContext' -Namespace Win32 -PassThru
# $api::udat_getContext(fmt, type, status)

#uselib "icuin.dll"
#func global udat_getContext "udat_getContext" sptr, sptr, sptr
; udat_getContext fmt, type, varptr(status)   ; 戻り値は stat
; fmt : void** -> "sptr"
; type : UDisplayContextType -> "sptr"
; status : 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 (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procudat_getContext = icuin.NewProc("udat_getContext")
)

// fmt (void**), type (UDisplayContextType), status (UErrorCode* in/out)
r1, _, err := procudat_getContext.Call(
	uintptr(fmt),
	uintptr(type),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UDisplayContext

function udat_getContext(
  fmt: Pointer;   // void**
  type: Integer;   // UDisplayContextType
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuin.dll' name 'udat_getContext';

result := DllCall("icuin\udat_getContext"
    , "Ptr", fmt   ; void**
    , "Int", type   ; UDisplayContextType
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: UDisplayContext

●udat_getContext(fmt, type, status) = DLL("icuin.dll", "int udat_getContext(void*, int, void*)")
# 呼び出し: udat_getContext(fmt, type, status)
# fmt : void** -> "void*"
# type : UDisplayContextType -> "int"
# status : 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 "icuin" fn udat_getContext(
    fmt: ?*anyopaque, // void**
    type: i32, // UDisplayContextType
    status: [*c]i32 // UErrorCode* in/out
) callconv(.c) i32;

proc udat_getContext(
    fmt: pointer,  # void**
    `type`: int32,  # UDisplayContextType
    status: ptr int32  # UErrorCode* in/out
): int32 {.importc: "udat_getContext", cdecl, dynlib: "icuin.dll".}

pragma(lib, "icuin");
extern(C)
int udat_getContext(
    void** fmt,   // void**
    int type,   // UDisplayContextType
    int* status   // UErrorCode* in/out
);

ccall((:udat_getContext, "icuin.dll"), Int32,
      (Ptr{Cvoid}, Int32, Ptr{Int32}),
      fmt, type, status)
# fmt : void** -> Ptr{Cvoid}
# type : UDisplayContextType -> Int32
# status : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
int32_t udat_getContext(
    void** fmt,
    int32_t type,
    int32_t* status);
]]
local icuin = ffi.load("icuin")
-- icuin.udat_getContext(fmt, type, status)
-- fmt : void**
-- type : UDisplayContextType
-- status : 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('icuin.dll');
const udat_getContext = lib.func('__cdecl', 'udat_getContext', 'int32_t', ['void *', 'int32_t', 'int32_t *']);
// udat_getContext(fmt, type, status)
// fmt : void** -> 'void *'
// type : UDisplayContextType -> 'int32_t'
// status : 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("icuin.dll", {
  udat_getContext: { parameters: ["pointer", "i32", "pointer"], result: "i32" },
});
// lib.symbols.udat_getContext(fmt, type, status)
// fmt : void** -> "pointer"
// type : UDisplayContextType -> "i32"
// status : 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
int32_t udat_getContext(
    void** fmt,
    int32_t type,
    int32_t* status);
C, "icuin.dll");
// $ffi->udat_getContext(fmt, type, status);
// fmt : void**
// type : UDisplayContextType
// status : 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 Icuin extends Library {
    Icuin INSTANCE = Native.load("icuin", Icuin.class);
    int udat_getContext(
        Pointer fmt,   // void**
        int type,   // UDisplayContextType
        IntByReference status   // UErrorCode* in/out
    );
}

@[Link("icuin")]
lib Libicuin
  fun udat_getContext = udat_getContext(
    fmt : Void**,   # void**
    type_ : Int32,   # UDisplayContextType
    status : Int32*   # UErrorCode* in/out
  ) : Int32
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 udat_getContextNative = Int32 Function(Pointer<Void>, Int32, Pointer<Int32>);
typedef udat_getContextDart = int Function(Pointer<Void>, int, Pointer<Int32>);
final udat_getContext = DynamicLibrary.open('icuin.dll')
    .lookupFunction<udat_getContextNative, udat_getContextDart>('udat_getContext');
// fmt : void** -> Pointer<Void>
// type : UDisplayContextType -> Int32
// status : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function udat_getContext(
  fmt: Pointer;   // void**
  type: Integer;   // UDisplayContextType
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuin.dll' name 'udat_getContext';

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

foreign import ccall safe "udat_getContext"
  c_udat_getContext :: Ptr () -> Int32 -> Ptr Int32 -> IO Int32
-- fmt : void** -> Ptr ()
-- type : UDisplayContextType -> Int32
-- status : 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 udat_getcontext =
  foreign "udat_getContext"
    ((ptr void) @-> int32_t @-> (ptr int32_t) @-> returning int32_t)
(* fmt : void** -> (ptr void) *)
(* type : UDisplayContextType -> int32_t *)
(* status : 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 icuin (t "icuin.dll"))
(cffi:use-foreign-library icuin)

(cffi:defcfun ("udat_getContext" udat-get-context :convention :cdecl) :int32
  (fmt :pointer)   ; void**
  (type :int32)   ; UDisplayContextType
  (status :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 $udat_getContext = Win32::API::More->new('icuin',
    'int udat_getContext(LPVOID fmt, int type, LPVOID status)');
# my $ret = $udat_getContext->Call($fmt, $type, $status);
# fmt : void** -> LPVOID
# type : UDisplayContextType -> int
# status : 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。