udat_formatCalendar

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

INT udat_formatCalendar(
    const void** format,
    void** calendar,
    WORD* result,
    INT capacity,
    UFieldPosition* position,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udat_formatCalendar(
    format As IntPtr,   ' void**
    calendar As IntPtr,   ' void** in/out
    ByRef result As UShort,   ' WORD* in/out
    capacity As Integer,   ' INT
    position As IntPtr,   ' UFieldPosition* in/out
    ByRef status As Integer   ' UErrorCode* in/out
) As Integer
End Function

' format : void**
' calendar : void** in/out
' result : WORD* in/out
' capacity : INT
' position : UFieldPosition* in/out
' status : UErrorCode* in/out
Declare PtrSafe Function udat_formatCalendar Lib "icuin" ( _
    ByVal format As LongPtr, _
    ByVal calendar As LongPtr, _
    ByRef result As Integer, _
    ByVal capacity As Long, _
    ByVal position As LongPtr, _
    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_formatCalendar = ctypes.cdll.icuin.udat_formatCalendar
udat_formatCalendar.restype = ctypes.c_int
udat_formatCalendar.argtypes = [
    ctypes.c_void_p,  # format : void**
    ctypes.c_void_p,  # calendar : void** in/out
    ctypes.POINTER(ctypes.c_ushort),  # result : WORD* in/out
    ctypes.c_int,  # capacity : INT
    ctypes.c_void_p,  # position : UFieldPosition* in/out
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_formatCalendar = Fiddle::Function.new(
  lib['udat_formatCalendar'],
  [
    Fiddle::TYPE_VOIDP,  # format : void**
    Fiddle::TYPE_VOIDP,  # calendar : void** in/out
    Fiddle::TYPE_VOIDP,  # result : WORD* in/out
    Fiddle::TYPE_INT,  # capacity : INT
    Fiddle::TYPE_VOIDP,  # position : UFieldPosition* in/out
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udat_formatCalendar(
        format: *const *const (),  // void**
        calendar: *mut *mut (),  // void** in/out
        result: *mut u16,  // WORD* in/out
        capacity: i32,  // INT
        position: *mut UFieldPosition,  // UFieldPosition* in/out
        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_formatCalendar(IntPtr format, IntPtr calendar, ref ushort result, int capacity, IntPtr position, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udat_formatCalendar' -Namespace Win32 -PassThru
# $api::udat_formatCalendar(format, calendar, result, capacity, position, status)

#uselib "icuin.dll"
#func global udat_formatCalendar "udat_formatCalendar" sptr, sptr, sptr, sptr, sptr, sptr
; udat_formatCalendar format, calendar, varptr(result), capacity, varptr(position), varptr(status)   ; 戻り値は stat
; format : void** -> "sptr"
; calendar : void** in/out -> "sptr"
; result : WORD* in/out -> "sptr"
; capacity : INT -> "sptr"
; position : UFieldPosition* in/out -> "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_formatCalendar = icuin.NewProc("udat_formatCalendar")
)

// format (void**), calendar (void** in/out), result (WORD* in/out), capacity (INT), position (UFieldPosition* in/out), status (UErrorCode* in/out)
r1, _, err := procudat_formatCalendar.Call(
	uintptr(format),
	uintptr(calendar),
	uintptr(result),
	uintptr(capacity),
	uintptr(position),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function udat_formatCalendar(
  format: Pointer;   // void**
  calendar: Pointer;   // void** in/out
  result: Pointer;   // WORD* in/out
  capacity: Integer;   // INT
  position: Pointer;   // UFieldPosition* in/out
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuin.dll' name 'udat_formatCalendar';

result := DllCall("icuin\udat_formatCalendar"
    , "Ptr", format   ; void**
    , "Ptr", calendar   ; void** in/out
    , "Ptr", result   ; WORD* in/out
    , "Int", capacity   ; INT
    , "Ptr", position   ; UFieldPosition* in/out
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

●udat_formatCalendar(format, calendar, result, capacity, position, status) = DLL("icuin.dll", "int udat_formatCalendar(void*, void*, void*, int, void*, void*)")
# 呼び出し: udat_formatCalendar(format, calendar, result, capacity, position, status)
# format : void** -> "void*"
# calendar : void** in/out -> "void*"
# result : WORD* in/out -> "void*"
# capacity : INT -> "int"
# position : UFieldPosition* in/out -> "void*"
# 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_formatCalendar(
    format: ?*anyopaque, // void**
    calendar: ?*anyopaque, // void** in/out
    result: [*c]u16, // WORD* in/out
    capacity: i32, // INT
    position: [*c]UFieldPosition, // UFieldPosition* in/out
    status: [*c]i32 // UErrorCode* in/out
) callconv(.c) i32;

proc udat_formatCalendar(
    format: pointer,  # void**
    calendar: pointer,  # void** in/out
    result: ptr uint16,  # WORD* in/out
    capacity: int32,  # INT
    position: ptr UFieldPosition,  # UFieldPosition* in/out
    status: ptr int32  # UErrorCode* in/out
): int32 {.importc: "udat_formatCalendar", cdecl, dynlib: "icuin.dll".}

pragma(lib, "icuin");
extern(C)
int udat_formatCalendar(
    void** format,   // void**
    void** calendar,   // void** in/out
    ushort* result,   // WORD* in/out
    int capacity,   // INT
    UFieldPosition* position,   // UFieldPosition* in/out
    int* status   // UErrorCode* in/out
);

ccall((:udat_formatCalendar, "icuin.dll"), Int32,
      (Ptr{Cvoid}, Ptr{Cvoid}, Ptr{UInt16}, Int32, Ptr{UFieldPosition}, Ptr{Int32}),
      format, calendar, result, capacity, position, status)
# format : void** -> Ptr{Cvoid}
# calendar : void** in/out -> Ptr{Cvoid}
# result : WORD* in/out -> Ptr{UInt16}
# capacity : INT -> Int32
# position : UFieldPosition* in/out -> Ptr{UFieldPosition}
# status : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
int32_t udat_formatCalendar(
    void** format,
    void** calendar,
    uint16_t* result,
    int32_t capacity,
    void* position,
    int32_t* status);
]]
local icuin = ffi.load("icuin")
-- icuin.udat_formatCalendar(format, calendar, result, capacity, position, status)
-- format : void**
-- calendar : void** in/out
-- result : WORD* in/out
-- capacity : INT
-- position : UFieldPosition* in/out
-- 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_formatCalendar = lib.func('__cdecl', 'udat_formatCalendar', 'int32_t', ['void *', 'void *', 'uint16_t *', 'int32_t', 'void *', 'int32_t *']);
// udat_formatCalendar(format, calendar, result, capacity, position, status)
// format : void** -> 'void *'
// calendar : void** in/out -> 'void *'
// result : WORD* in/out -> 'uint16_t *'
// capacity : INT -> 'int32_t'
// position : UFieldPosition* in/out -> 'void *'
// 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_formatCalendar: { parameters: ["pointer", "pointer", "pointer", "i32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.udat_formatCalendar(format, calendar, result, capacity, position, status)
// format : void** -> "pointer"
// calendar : void** in/out -> "pointer"
// result : WORD* in/out -> "pointer"
// capacity : INT -> "i32"
// position : UFieldPosition* in/out -> "pointer"
// 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_formatCalendar(
    void** format,
    void** calendar,
    uint16_t* result,
    int32_t capacity,
    void* position,
    int32_t* status);
C, "icuin.dll");
// $ffi->udat_formatCalendar(format, calendar, result, capacity, position, status);
// format : void**
// calendar : void** in/out
// result : WORD* in/out
// capacity : INT
// position : UFieldPosition* in/out
// 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_formatCalendar(
        Pointer format,   // void**
        Pointer calendar,   // void** in/out
        ShortByReference result,   // WORD* in/out
        int capacity,   // INT
        Pointer position,   // UFieldPosition* in/out
        IntByReference status   // UErrorCode* in/out
    );
}

@[Link("icuin")]
lib Libicuin
  fun udat_formatCalendar = udat_formatCalendar(
    format : Void**,   # void**
    calendar : Void**,   # void** in/out
    result : UInt16*,   # WORD* in/out
    capacity : Int32,   # INT
    position : UFieldPosition*,   # UFieldPosition* in/out
    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_formatCalendarNative = Int32 Function(Pointer<Void>, Pointer<Void>, Pointer<Uint16>, Int32, Pointer<Void>, Pointer<Int32>);
typedef udat_formatCalendarDart = int Function(Pointer<Void>, Pointer<Void>, Pointer<Uint16>, int, Pointer<Void>, Pointer<Int32>);
final udat_formatCalendar = DynamicLibrary.open('icuin.dll')
    .lookupFunction<udat_formatCalendarNative, udat_formatCalendarDart>('udat_formatCalendar');
// format : void** -> Pointer<Void>
// calendar : void** in/out -> Pointer<Void>
// result : WORD* in/out -> Pointer<Uint16>
// capacity : INT -> Int32
// position : UFieldPosition* in/out -> Pointer<Void>
// status : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function udat_formatCalendar(
  format: Pointer;   // void**
  calendar: Pointer;   // void** in/out
  result: Pointer;   // WORD* in/out
  capacity: Integer;   // INT
  position: Pointer;   // UFieldPosition* in/out
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuin.dll' name 'udat_formatCalendar';

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

foreign import ccall safe "udat_formatCalendar"
  c_udat_formatCalendar :: Ptr () -> Ptr () -> Ptr Word16 -> Int32 -> Ptr () -> Ptr Int32 -> IO Int32
-- format : void** -> Ptr ()
-- calendar : void** in/out -> Ptr ()
-- result : WORD* in/out -> Ptr Word16
-- capacity : INT -> Int32
-- position : UFieldPosition* in/out -> Ptr ()
-- 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_formatcalendar =
  foreign "udat_formatCalendar"
    ((ptr void) @-> (ptr void) @-> (ptr uint16_t) @-> int32_t @-> (ptr void) @-> (ptr int32_t) @-> returning int32_t)
(* format : void** -> (ptr void) *)
(* calendar : void** in/out -> (ptr void) *)
(* result : WORD* in/out -> (ptr uint16_t) *)
(* capacity : INT -> int32_t *)
(* position : UFieldPosition* in/out -> (ptr void) *)
(* 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_formatCalendar" udat-format-calendar :convention :cdecl) :int32
  (format :pointer)   ; void**
  (calendar :pointer)   ; void** in/out
  (result :pointer)   ; WORD* in/out
  (capacity :int32)   ; INT
  (position :pointer)   ; UFieldPosition* in/out
  (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_formatCalendar = Win32::API::More->new('icuin',
    'int udat_formatCalendar(LPVOID format, LPVOID calendar, LPVOID result, int capacity, LPVOID position, LPVOID status)');
# my $ret = $udat_formatCalendar->Call($format, $calendar, $result, $capacity, $position, $status);
# format : void** -> LPVOID
# calendar : void** in/out -> LPVOID
# result : WORD* in/out -> LPVOID
# capacity : INT -> int
# position : UFieldPosition* in/out -> LPVOID
# 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。