ucurr_forLocale

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

INT ucurr_forLocale(
    LPCSTR locale,
    WORD* buff,
    INT buffCapacity,
    UErrorCode* ec
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucurr_forLocale(
    <MarshalAs(UnmanagedType.LPStr)> locale As String,   ' LPCSTR
    ByRef buff As UShort,   ' WORD* in/out
    buffCapacity As Integer,   ' INT
    ByRef ec As Integer   ' UErrorCode* in/out
) As Integer
End Function

' locale : LPCSTR
' buff : WORD* in/out
' buffCapacity : INT
' ec : UErrorCode* in/out
Declare PtrSafe Function ucurr_forLocale Lib "icuuc" ( _
    ByVal locale As String, _
    ByRef buff As Integer, _
    ByVal buffCapacity As Long, _
    ByRef ec 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

ucurr_forLocale = ctypes.cdll.icuuc.ucurr_forLocale
ucurr_forLocale.restype = ctypes.c_int
ucurr_forLocale.argtypes = [
    wintypes.LPCSTR,  # locale : LPCSTR
    ctypes.POINTER(ctypes.c_ushort),  # buff : WORD* in/out
    ctypes.c_int,  # buffCapacity : INT
    ctypes.c_void_p,  # ec : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
ucurr_forLocale = Fiddle::Function.new(
  lib['ucurr_forLocale'],
  [
    Fiddle::TYPE_VOIDP,  # locale : LPCSTR
    Fiddle::TYPE_VOIDP,  # buff : WORD* in/out
    Fiddle::TYPE_INT,  # buffCapacity : INT
    Fiddle::TYPE_VOIDP,  # ec : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn ucurr_forLocale(
        locale: *const u8,  // LPCSTR
        buff: *mut u16,  // WORD* in/out
        buffCapacity: i32,  // INT
        ec: *mut i32  // UErrorCode* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int ucurr_forLocale([MarshalAs(UnmanagedType.LPStr)] string locale, ref ushort buff, int buffCapacity, ref int ec);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_ucurr_forLocale' -Namespace Win32 -PassThru
# $api::ucurr_forLocale(locale, buff, buffCapacity, ec)

#uselib "icuuc.dll"
#func global ucurr_forLocale "ucurr_forLocale" sptr, sptr, sptr, sptr
; ucurr_forLocale locale, varptr(buff), buffCapacity, varptr(ec)   ; 戻り値は stat
; locale : LPCSTR -> "sptr"
; buff : WORD* in/out -> "sptr"
; buffCapacity : INT -> "sptr"
; ec : 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 (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	procucurr_forLocale = icuuc.NewProc("ucurr_forLocale")
)

// locale (LPCSTR), buff (WORD* in/out), buffCapacity (INT), ec (UErrorCode* in/out)
r1, _, err := procucurr_forLocale.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(locale))),
	uintptr(buff),
	uintptr(buffCapacity),
	uintptr(ec),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function ucurr_forLocale(
  locale: PAnsiChar;   // LPCSTR
  buff: Pointer;   // WORD* in/out
  buffCapacity: Integer;   // INT
  ec: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'ucurr_forLocale';

result := DllCall("icuuc\ucurr_forLocale"
    , "AStr", locale   ; LPCSTR
    , "Ptr", buff   ; WORD* in/out
    , "Int", buffCapacity   ; INT
    , "Ptr", ec   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

●ucurr_forLocale(locale, buff, buffCapacity, ec) = DLL("icuuc.dll", "int ucurr_forLocale(char*, void*, int, void*)")
# 呼び出し: ucurr_forLocale(locale, buff, buffCapacity, ec)
# locale : LPCSTR -> "char*"
# buff : WORD* in/out -> "void*"
# buffCapacity : INT -> "int"
# ec : 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 "icuuc" fn ucurr_forLocale(
    locale: [*c]const u8, // LPCSTR
    buff: [*c]u16, // WORD* in/out
    buffCapacity: i32, // INT
    ec: [*c]i32 // UErrorCode* in/out
) callconv(.c) i32;

proc ucurr_forLocale(
    locale: cstring,  # LPCSTR
    buff: ptr uint16,  # WORD* in/out
    buffCapacity: int32,  # INT
    ec: ptr int32  # UErrorCode* in/out
): int32 {.importc: "ucurr_forLocale", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
int ucurr_forLocale(
    const(char)* locale,   // LPCSTR
    ushort* buff,   // WORD* in/out
    int buffCapacity,   // INT
    int* ec   // UErrorCode* in/out
);

ccall((:ucurr_forLocale, "icuuc.dll"), Int32,
      (Cstring, Ptr{UInt16}, Int32, Ptr{Int32}),
      locale, buff, buffCapacity, ec)
# locale : LPCSTR -> Cstring
# buff : WORD* in/out -> Ptr{UInt16}
# buffCapacity : INT -> Int32
# ec : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
int32_t ucurr_forLocale(
    const char* locale,
    uint16_t* buff,
    int32_t buffCapacity,
    int32_t* ec);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.ucurr_forLocale(locale, buff, buffCapacity, ec)
-- locale : LPCSTR
-- buff : WORD* in/out
-- buffCapacity : INT
-- ec : 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('icuuc.dll');
const ucurr_forLocale = lib.func('__cdecl', 'ucurr_forLocale', 'int32_t', ['str', 'uint16_t *', 'int32_t', 'int32_t *']);
// ucurr_forLocale(locale, buff, buffCapacity, ec)
// locale : LPCSTR -> 'str'
// buff : WORD* in/out -> 'uint16_t *'
// buffCapacity : INT -> 'int32_t'
// ec : 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("icuuc.dll", {
  ucurr_forLocale: { parameters: ["buffer", "pointer", "i32", "pointer"], result: "i32" },
});
// lib.symbols.ucurr_forLocale(locale, buff, buffCapacity, ec)
// locale : LPCSTR -> "buffer"
// buff : WORD* in/out -> "pointer"
// buffCapacity : INT -> "i32"
// ec : 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 ucurr_forLocale(
    const char* locale,
    uint16_t* buff,
    int32_t buffCapacity,
    int32_t* ec);
C, "icuuc.dll");
// $ffi->ucurr_forLocale(locale, buff, buffCapacity, ec);
// locale : LPCSTR
// buff : WORD* in/out
// buffCapacity : INT
// ec : 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 Icuuc extends Library {
    Icuuc INSTANCE = Native.load("icuuc", Icuuc.class);
    int ucurr_forLocale(
        String locale,   // LPCSTR
        ShortByReference buff,   // WORD* in/out
        int buffCapacity,   // INT
        IntByReference ec   // UErrorCode* in/out
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun ucurr_forLocale = ucurr_forLocale(
    locale : UInt8*,   # LPCSTR
    buff : UInt16*,   # WORD* in/out
    buffCapacity : Int32,   # INT
    ec : 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 ucurr_forLocaleNative = Int32 Function(Pointer<Utf8>, Pointer<Uint16>, Int32, Pointer<Int32>);
typedef ucurr_forLocaleDart = int Function(Pointer<Utf8>, Pointer<Uint16>, int, Pointer<Int32>);
final ucurr_forLocale = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<ucurr_forLocaleNative, ucurr_forLocaleDart>('ucurr_forLocale');
// locale : LPCSTR -> Pointer<Utf8>
// buff : WORD* in/out -> Pointer<Uint16>
// buffCapacity : INT -> Int32
// ec : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function ucurr_forLocale(
  locale: PAnsiChar;   // LPCSTR
  buff: Pointer;   // WORD* in/out
  buffCapacity: Integer;   // INT
  ec: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'ucurr_forLocale';

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

foreign import ccall safe "ucurr_forLocale"
  c_ucurr_forLocale :: CString -> Ptr Word16 -> Int32 -> Ptr Int32 -> IO Int32
-- locale : LPCSTR -> CString
-- buff : WORD* in/out -> Ptr Word16
-- buffCapacity : INT -> Int32
-- ec : 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 ucurr_forlocale =
  foreign "ucurr_forLocale"
    (string @-> (ptr uint16_t) @-> int32_t @-> (ptr int32_t) @-> returning int32_t)
(* locale : LPCSTR -> string *)
(* buff : WORD* in/out -> (ptr uint16_t) *)
(* buffCapacity : INT -> int32_t *)
(* ec : 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 icuuc (t "icuuc.dll"))
(cffi:use-foreign-library icuuc)

(cffi:defcfun ("ucurr_forLocale" ucurr-for-locale :convention :cdecl) :int32
  (locale :string)   ; LPCSTR
  (buff :pointer)   ; WORD* in/out
  (buff-capacity :int32)   ; INT
  (ec :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 $ucurr_forLocale = Win32::API::More->new('icuuc',
    'int ucurr_forLocale(LPCSTR locale, LPVOID buff, int buffCapacity, LPVOID ec)');
# my $ret = $ucurr_forLocale->Call($locale, $buff, $buffCapacity, $ec);
# locale : LPCSTR -> LPCSTR
# buff : WORD* in/out -> LPVOID
# buffCapacity : INT -> int
# ec : 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。