udat_getSymbols

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

INT udat_getSymbols(
    const void** fmt,
    UDateFormatSymbolType type,
    INT symbolIndex,
    WORD* result,
    INT resultLength,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udat_getSymbols(
    fmt As IntPtr,   ' void**
    type As Integer,   ' UDateFormatSymbolType
    symbolIndex As Integer,   ' INT
    ByRef result As UShort,   ' WORD* in/out
    resultLength As Integer,   ' INT
    ByRef status As Integer   ' UErrorCode* in/out
) As Integer
End Function

' fmt : void**
' type : UDateFormatSymbolType
' symbolIndex : INT
' result : WORD* in/out
' resultLength : INT
' status : UErrorCode* in/out
Declare PtrSafe Function udat_getSymbols Lib "icuin" ( _
    ByVal fmt As LongPtr, _
    ByVal type As Long, _
    ByVal symbolIndex As Long, _
    ByRef result As Integer, _
    ByVal resultLength 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_getSymbols = ctypes.cdll.icuin.udat_getSymbols
udat_getSymbols.restype = ctypes.c_int
udat_getSymbols.argtypes = [
    ctypes.c_void_p,  # fmt : void**
    ctypes.c_int,  # type : UDateFormatSymbolType
    ctypes.c_int,  # symbolIndex : INT
    ctypes.POINTER(ctypes.c_ushort),  # result : WORD* in/out
    ctypes.c_int,  # resultLength : INT
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_getSymbols = Fiddle::Function.new(
  lib['udat_getSymbols'],
  [
    Fiddle::TYPE_VOIDP,  # fmt : void**
    Fiddle::TYPE_INT,  # type : UDateFormatSymbolType
    Fiddle::TYPE_INT,  # symbolIndex : INT
    Fiddle::TYPE_VOIDP,  # result : WORD* in/out
    Fiddle::TYPE_INT,  # resultLength : INT
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn udat_getSymbols(
        fmt: *const *const (),  // void**
        type: i32,  // UDateFormatSymbolType
        symbolIndex: i32,  // INT
        result: *mut u16,  // WORD* in/out
        resultLength: i32,  // INT
        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_getSymbols(IntPtr fmt, int type, int symbolIndex, ref ushort result, int resultLength, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_udat_getSymbols' -Namespace Win32 -PassThru
# $api::udat_getSymbols(fmt, type, symbolIndex, result, resultLength, status)

#uselib "icuin.dll"
#func global udat_getSymbols "udat_getSymbols" sptr, sptr, sptr, sptr, sptr, sptr
; udat_getSymbols fmt, type, symbolIndex, varptr(result), resultLength, varptr(status)   ; 戻り値は stat
; fmt : void** -> "sptr"
; type : UDateFormatSymbolType -> "sptr"
; symbolIndex : INT -> "sptr"
; result : WORD* in/out -> "sptr"
; resultLength : INT -> "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_getSymbols = icuin.NewProc("udat_getSymbols")
)

// fmt (void**), type (UDateFormatSymbolType), symbolIndex (INT), result (WORD* in/out), resultLength (INT), status (UErrorCode* in/out)
r1, _, err := procudat_getSymbols.Call(
	uintptr(fmt),
	uintptr(type),
	uintptr(symbolIndex),
	uintptr(result),
	uintptr(resultLength),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function udat_getSymbols(
  fmt: Pointer;   // void**
  type: Integer;   // UDateFormatSymbolType
  symbolIndex: Integer;   // INT
  result: Pointer;   // WORD* in/out
  resultLength: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuin.dll' name 'udat_getSymbols';

result := DllCall("icuin\udat_getSymbols"
    , "Ptr", fmt   ; void**
    , "Int", type   ; UDateFormatSymbolType
    , "Int", symbolIndex   ; INT
    , "Ptr", result   ; WORD* in/out
    , "Int", resultLength   ; INT
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

●udat_getSymbols(fmt, type, symbolIndex, result, resultLength, status) = DLL("icuin.dll", "int udat_getSymbols(void*, int, int, void*, int, void*)")
# 呼び出し: udat_getSymbols(fmt, type, symbolIndex, result, resultLength, status)
# fmt : void** -> "void*"
# type : UDateFormatSymbolType -> "int"
# symbolIndex : INT -> "int"
# result : WORD* in/out -> "void*"
# resultLength : INT -> "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_getSymbols(
    fmt: ?*anyopaque, // void**
    type: i32, // UDateFormatSymbolType
    symbolIndex: i32, // INT
    result: [*c]u16, // WORD* in/out
    resultLength: i32, // INT
    status: [*c]i32 // UErrorCode* in/out
) callconv(.c) i32;

proc udat_getSymbols(
    fmt: pointer,  # void**
    `type`: int32,  # UDateFormatSymbolType
    symbolIndex: int32,  # INT
    result: ptr uint16,  # WORD* in/out
    resultLength: int32,  # INT
    status: ptr int32  # UErrorCode* in/out
): int32 {.importc: "udat_getSymbols", cdecl, dynlib: "icuin.dll".}

pragma(lib, "icuin");
extern(C)
int udat_getSymbols(
    void** fmt,   // void**
    int type,   // UDateFormatSymbolType
    int symbolIndex,   // INT
    ushort* result,   // WORD* in/out
    int resultLength,   // INT
    int* status   // UErrorCode* in/out
);

ccall((:udat_getSymbols, "icuin.dll"), Int32,
      (Ptr{Cvoid}, Int32, Int32, Ptr{UInt16}, Int32, Ptr{Int32}),
      fmt, type, symbolIndex, result, resultLength, status)
# fmt : void** -> Ptr{Cvoid}
# type : UDateFormatSymbolType -> Int32
# symbolIndex : INT -> Int32
# result : WORD* in/out -> Ptr{UInt16}
# resultLength : INT -> Int32
# status : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
int32_t udat_getSymbols(
    void** fmt,
    int32_t type,
    int32_t symbolIndex,
    uint16_t* result,
    int32_t resultLength,
    int32_t* status);
]]
local icuin = ffi.load("icuin")
-- icuin.udat_getSymbols(fmt, type, symbolIndex, result, resultLength, status)
-- fmt : void**
-- type : UDateFormatSymbolType
-- symbolIndex : INT
-- result : WORD* in/out
-- resultLength : INT
-- 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_getSymbols = lib.func('__cdecl', 'udat_getSymbols', 'int32_t', ['void *', 'int32_t', 'int32_t', 'uint16_t *', 'int32_t', 'int32_t *']);
// udat_getSymbols(fmt, type, symbolIndex, result, resultLength, status)
// fmt : void** -> 'void *'
// type : UDateFormatSymbolType -> 'int32_t'
// symbolIndex : INT -> 'int32_t'
// result : WORD* in/out -> 'uint16_t *'
// resultLength : INT -> '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_getSymbols: { parameters: ["pointer", "i32", "i32", "pointer", "i32", "pointer"], result: "i32" },
});
// lib.symbols.udat_getSymbols(fmt, type, symbolIndex, result, resultLength, status)
// fmt : void** -> "pointer"
// type : UDateFormatSymbolType -> "i32"
// symbolIndex : INT -> "i32"
// result : WORD* in/out -> "pointer"
// resultLength : INT -> "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_getSymbols(
    void** fmt,
    int32_t type,
    int32_t symbolIndex,
    uint16_t* result,
    int32_t resultLength,
    int32_t* status);
C, "icuin.dll");
// $ffi->udat_getSymbols(fmt, type, symbolIndex, result, resultLength, status);
// fmt : void**
// type : UDateFormatSymbolType
// symbolIndex : INT
// result : WORD* in/out
// resultLength : INT
// 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_getSymbols(
        Pointer fmt,   // void**
        int type,   // UDateFormatSymbolType
        int symbolIndex,   // INT
        ShortByReference result,   // WORD* in/out
        int resultLength,   // INT
        IntByReference status   // UErrorCode* in/out
    );
}

@[Link("icuin")]
lib Libicuin
  fun udat_getSymbols = udat_getSymbols(
    fmt : Void**,   # void**
    type_ : Int32,   # UDateFormatSymbolType
    symbolIndex : Int32,   # INT
    result : UInt16*,   # WORD* in/out
    resultLength : Int32,   # INT
    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_getSymbolsNative = Int32 Function(Pointer<Void>, Int32, Int32, Pointer<Uint16>, Int32, Pointer<Int32>);
typedef udat_getSymbolsDart = int Function(Pointer<Void>, int, int, Pointer<Uint16>, int, Pointer<Int32>);
final udat_getSymbols = DynamicLibrary.open('icuin.dll')
    .lookupFunction<udat_getSymbolsNative, udat_getSymbolsDart>('udat_getSymbols');
// fmt : void** -> Pointer<Void>
// type : UDateFormatSymbolType -> Int32
// symbolIndex : INT -> Int32
// result : WORD* in/out -> Pointer<Uint16>
// resultLength : INT -> Int32
// status : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function udat_getSymbols(
  fmt: Pointer;   // void**
  type: Integer;   // UDateFormatSymbolType
  symbolIndex: Integer;   // INT
  result: Pointer;   // WORD* in/out
  resultLength: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuin.dll' name 'udat_getSymbols';

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

foreign import ccall safe "udat_getSymbols"
  c_udat_getSymbols :: Ptr () -> Int32 -> Int32 -> Ptr Word16 -> Int32 -> Ptr Int32 -> IO Int32
-- fmt : void** -> Ptr ()
-- type : UDateFormatSymbolType -> Int32
-- symbolIndex : INT -> Int32
-- result : WORD* in/out -> Ptr Word16
-- resultLength : INT -> 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_getsymbols =
  foreign "udat_getSymbols"
    ((ptr void) @-> int32_t @-> int32_t @-> (ptr uint16_t) @-> int32_t @-> (ptr int32_t) @-> returning int32_t)
(* fmt : void** -> (ptr void) *)
(* type : UDateFormatSymbolType -> int32_t *)
(* symbolIndex : INT -> int32_t *)
(* result : WORD* in/out -> (ptr uint16_t) *)
(* resultLength : INT -> 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_getSymbols" udat-get-symbols :convention :cdecl) :int32
  (fmt :pointer)   ; void**
  (type :int32)   ; UDateFormatSymbolType
  (symbol-index :int32)   ; INT
  (result :pointer)   ; WORD* in/out
  (result-length :int32)   ; INT
  (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_getSymbols = Win32::API::More->new('icuin',
    'int udat_getSymbols(LPVOID fmt, int type, int symbolIndex, LPVOID result, int resultLength, LPVOID status)');
# my $ret = $udat_getSymbols->Call($fmt, $type, $symbolIndex, $result, $resultLength, $status);
# fmt : void** -> LPVOID
# type : UDateFormatSymbolType -> int
# symbolIndex : INT -> int
# result : WORD* in/out -> LPVOID
# resultLength : INT -> 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。