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), 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。

#uselib "icuin.dll"
#cfunc global udat_formatCalendar "udat_formatCalendar" sptr, sptr, var, int, var, int
; res = udat_formatCalendar(format, calendar, result, capacity, position, status)
; format : void** -> "sptr"
; calendar : void** in/out -> "sptr"
; result : WORD* in/out -> "var"
; capacity : INT -> "int"
; position : UFieldPosition* in/out -> "var"
; status : UErrorCode* in/out -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; INT udat_formatCalendar(void** format, void** calendar, WORD* result, INT capacity, UFieldPosition* position, UErrorCode* status)
#uselib "icuin.dll"
#cfunc global udat_formatCalendar "udat_formatCalendar" intptr, intptr, var, int, var, int
; res = udat_formatCalendar(format, calendar, result, capacity, position, status)
; format : void** -> "intptr"
; calendar : void** in/out -> "intptr"
; result : WORD* in/out -> "var"
; capacity : INT -> "int"
; position : UFieldPosition* in/out -> "var"
; status : UErrorCode* in/out -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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。