udat_countSymbols

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

INT udat_countSymbols(
    const void** fmt,
    UDateFormatSymbolType type
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function udat_countSymbols(
    fmt As IntPtr,   ' void**
    type As Integer   ' UDateFormatSymbolType
) As Integer
End Function

' fmt : void**
' type : UDateFormatSymbolType
Declare PtrSafe Function udat_countSymbols Lib "icuin" ( _
    ByVal fmt As LongPtr, _
    ByVal type 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_countSymbols = ctypes.cdll.icuin.udat_countSymbols
udat_countSymbols.restype = ctypes.c_int
udat_countSymbols.argtypes = [
    ctypes.c_void_p,  # fmt : void**
    ctypes.c_int,  # type : UDateFormatSymbolType
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
udat_countSymbols = Fiddle::Function.new(
  lib['udat_countSymbols'],
  [
    Fiddle::TYPE_VOIDP,  # fmt : void**
    Fiddle::TYPE_INT,  # type : UDateFormatSymbolType
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

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

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

#uselib "icuin.dll"
#func global udat_countSymbols "udat_countSymbols" sptr, sptr
; udat_countSymbols fmt, type   ; 戻り値は stat
; fmt : void** -> "sptr"
; type : UDateFormatSymbolType -> "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_countSymbols "udat_countSymbols" sptr, int
; res = udat_countSymbols(fmt, type)
; fmt : void** -> "sptr"
; type : UDateFormatSymbolType -> "int"

; INT udat_countSymbols(void** fmt, UDateFormatSymbolType type)
#uselib "icuin.dll"
#cfunc global udat_countSymbols "udat_countSymbols" intptr, int
; res = udat_countSymbols(fmt, type)
; fmt : void** -> "intptr"
; type : UDateFormatSymbolType -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procudat_countSymbols = icuin.NewProc("udat_countSymbols")
)

// fmt (void**), type (UDateFormatSymbolType)
r1, _, err := procudat_countSymbols.Call(
	uintptr(fmt),
	uintptr(type),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function udat_countSymbols(
  fmt: Pointer;   // void**
  type: Integer   // UDateFormatSymbolType
): Integer; cdecl;
  external 'icuin.dll' name 'udat_countSymbols';

result := DllCall("icuin\udat_countSymbols"
    , "Ptr", fmt   ; void**
    , "Int", type   ; UDateFormatSymbolType
    , "Cdecl Int")   ; return: INT

●udat_countSymbols(fmt, type) = DLL("icuin.dll", "int udat_countSymbols(void*, int)")
# 呼び出し: udat_countSymbols(fmt, type)
# fmt : void** -> "void*"
# type : UDateFormatSymbolType -> "int"
# 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_countSymbols(
    fmt: ?*anyopaque, // void**
    type: i32 // UDateFormatSymbolType
) callconv(.c) i32;

proc udat_countSymbols(
    fmt: pointer,  # void**
    `type`: int32  # UDateFormatSymbolType
): int32 {.importc: "udat_countSymbols", cdecl, dynlib: "icuin.dll".}

pragma(lib, "icuin");
extern(C)
int udat_countSymbols(
    void** fmt,   // void**
    int type   // UDateFormatSymbolType
);

ccall((:udat_countSymbols, "icuin.dll"), Int32,
      (Ptr{Cvoid}, Int32),
      fmt, type)
# fmt : void** -> Ptr{Cvoid}
# type : UDateFormatSymbolType -> Int32

local ffi = require("ffi")
ffi.cdef[[
int32_t udat_countSymbols(
    void** fmt,
    int32_t type);
]]
local icuin = ffi.load("icuin")
-- icuin.udat_countSymbols(fmt, type)
-- fmt : void**
-- type : UDateFormatSymbolType
-- 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_countSymbols = lib.func('__cdecl', 'udat_countSymbols', 'int32_t', ['void *', 'int32_t']);
// udat_countSymbols(fmt, type)
// fmt : void** -> 'void *'
// type : UDateFormatSymbolType -> '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_countSymbols: { parameters: ["pointer", "i32"], result: "i32" },
});
// lib.symbols.udat_countSymbols(fmt, type)
// fmt : void** -> "pointer"
// type : UDateFormatSymbolType -> "i32"
// 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_countSymbols(
    void** fmt,
    int32_t type);
C, "icuin.dll");
// $ffi->udat_countSymbols(fmt, type);
// fmt : void**
// type : UDateFormatSymbolType
// 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_countSymbols(
        Pointer fmt,   // void**
        int type   // UDateFormatSymbolType
    );
}

@[Link("icuin")]
lib Libicuin
  fun udat_countSymbols = udat_countSymbols(
    fmt : Void**,   # void**
    type_ : Int32   # UDateFormatSymbolType
  ) : 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_countSymbolsNative = Int32 Function(Pointer<Void>, Int32);
typedef udat_countSymbolsDart = int Function(Pointer<Void>, int);
final udat_countSymbols = DynamicLibrary.open('icuin.dll')
    .lookupFunction<udat_countSymbolsNative, udat_countSymbolsDart>('udat_countSymbols');
// fmt : void** -> Pointer<Void>
// type : UDateFormatSymbolType -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function udat_countSymbols(
  fmt: Pointer;   // void**
  type: Integer   // UDateFormatSymbolType
): Integer; cdecl;
  external 'icuin.dll' name 'udat_countSymbols';

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

foreign import ccall safe "udat_countSymbols"
  c_udat_countSymbols :: Ptr () -> Int32 -> IO Int32
-- fmt : void** -> Ptr ()
-- type : UDateFormatSymbolType -> 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_countsymbols =
  foreign "udat_countSymbols"
    ((ptr void) @-> int32_t @-> returning int32_t)
(* fmt : void** -> (ptr void) *)
(* type : UDateFormatSymbolType -> 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_countSymbols" udat-count-symbols :convention :cdecl) :int32
  (fmt :pointer)   ; void**
  (type :int32))   ; UDateFormatSymbolType
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $udat_countSymbols = Win32::API::More->new('icuin',
    'int udat_countSymbols(LPVOID fmt, int type)');
# my $ret = $udat_countSymbols->Call($fmt, $type);
# fmt : void** -> LPVOID
# type : UDateFormatSymbolType -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。