uloc_getDisplayVariant

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

INT uloc_getDisplayVariant(
    LPCSTR locale,
    LPCSTR displayLocale,
    WORD* variant,
    INT variantCapacity,
    UErrorCode* status
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function uloc_getDisplayVariant(
    <MarshalAs(UnmanagedType.LPStr)> locale As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> displayLocale As String,   ' LPCSTR
    ByRef [variant] As UShort,   ' WORD* in/out
    variantCapacity As Integer,   ' INT
    ByRef status As Integer   ' UErrorCode* in/out
) As Integer
End Function

' locale : LPCSTR
' displayLocale : LPCSTR
' variant : WORD* in/out
' variantCapacity : INT
' status : UErrorCode* in/out
Declare PtrSafe Function uloc_getDisplayVariant Lib "icuuc" ( _
    ByVal locale As String, _
    ByVal displayLocale As String, _
    ByRef variant As Integer, _
    ByVal variantCapacity 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

uloc_getDisplayVariant = ctypes.cdll.icuuc.uloc_getDisplayVariant
uloc_getDisplayVariant.restype = ctypes.c_int
uloc_getDisplayVariant.argtypes = [
    wintypes.LPCSTR,  # locale : LPCSTR
    wintypes.LPCSTR,  # displayLocale : LPCSTR
    ctypes.POINTER(ctypes.c_ushort),  # variant : WORD* in/out
    ctypes.c_int,  # variantCapacity : INT
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
uloc_getDisplayVariant = Fiddle::Function.new(
  lib['uloc_getDisplayVariant'],
  [
    Fiddle::TYPE_VOIDP,  # locale : LPCSTR
    Fiddle::TYPE_VOIDP,  # displayLocale : LPCSTR
    Fiddle::TYPE_VOIDP,  # variant : WORD* in/out
    Fiddle::TYPE_INT,  # variantCapacity : INT
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn uloc_getDisplayVariant(
        locale: *const u8,  // LPCSTR
        displayLocale: *const u8,  // LPCSTR
        variant: *mut u16,  // WORD* in/out
        variantCapacity: i32,  // INT
        status: *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 uloc_getDisplayVariant([MarshalAs(UnmanagedType.LPStr)] string locale, [MarshalAs(UnmanagedType.LPStr)] string displayLocale, ref ushort variant, int variantCapacity, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_uloc_getDisplayVariant' -Namespace Win32 -PassThru
# $api::uloc_getDisplayVariant(locale, displayLocale, variant, variantCapacity, status)

#uselib "icuuc.dll"
#func global uloc_getDisplayVariant "uloc_getDisplayVariant" sptr, sptr, sptr, sptr, sptr
; uloc_getDisplayVariant locale, displayLocale, varptr(variant), variantCapacity, varptr(status)   ; 戻り値は stat
; locale : LPCSTR -> "sptr"
; displayLocale : LPCSTR -> "sptr"
; variant : WORD* in/out -> "sptr"
; variantCapacity : 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 (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	proculoc_getDisplayVariant = icuuc.NewProc("uloc_getDisplayVariant")
)

// locale (LPCSTR), displayLocale (LPCSTR), variant (WORD* in/out), variantCapacity (INT), status (UErrorCode* in/out)
r1, _, err := proculoc_getDisplayVariant.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(locale))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(displayLocale))),
	uintptr(variant),
	uintptr(variantCapacity),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function uloc_getDisplayVariant(
  locale: PAnsiChar;   // LPCSTR
  displayLocale: PAnsiChar;   // LPCSTR
  variant: Pointer;   // WORD* in/out
  variantCapacity: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'uloc_getDisplayVariant';

result := DllCall("icuuc\uloc_getDisplayVariant"
    , "AStr", locale   ; LPCSTR
    , "AStr", displayLocale   ; LPCSTR
    , "Ptr", variant   ; WORD* in/out
    , "Int", variantCapacity   ; INT
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

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

proc uloc_getDisplayVariant(
    locale: cstring,  # LPCSTR
    displayLocale: cstring,  # LPCSTR
    variant: ptr uint16,  # WORD* in/out
    variantCapacity: int32,  # INT
    status: ptr int32  # UErrorCode* in/out
): int32 {.importc: "uloc_getDisplayVariant", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
int uloc_getDisplayVariant(
    const(char)* locale,   // LPCSTR
    const(char)* displayLocale,   // LPCSTR
    ushort* variant,   // WORD* in/out
    int variantCapacity,   // INT
    int* status   // UErrorCode* in/out
);

ccall((:uloc_getDisplayVariant, "icuuc.dll"), Int32,
      (Cstring, Cstring, Ptr{UInt16}, Int32, Ptr{Int32}),
      locale, displayLocale, variant, variantCapacity, status)
# locale : LPCSTR -> Cstring
# displayLocale : LPCSTR -> Cstring
# variant : WORD* in/out -> Ptr{UInt16}
# variantCapacity : INT -> Int32
# status : UErrorCode* in/out -> Ptr{Int32}

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

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

{$mode objfpc}{$H+}
function uloc_getDisplayVariant(
  locale: PAnsiChar;   // LPCSTR
  displayLocale: PAnsiChar;   // LPCSTR
  variant: Pointer;   // WORD* in/out
  variantCapacity: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'uloc_getDisplayVariant';

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

foreign import ccall safe "uloc_getDisplayVariant"
  c_uloc_getDisplayVariant :: CString -> CString -> Ptr Word16 -> Int32 -> Ptr Int32 -> IO Int32
-- locale : LPCSTR -> CString
-- displayLocale : LPCSTR -> CString
-- variant : WORD* in/out -> Ptr Word16
-- variantCapacity : 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 uloc_getdisplayvariant =
  foreign "uloc_getDisplayVariant"
    (string @-> string @-> (ptr uint16_t) @-> int32_t @-> (ptr int32_t) @-> returning int32_t)
(* locale : LPCSTR -> string *)
(* displayLocale : LPCSTR -> string *)
(* variant : WORD* in/out -> (ptr uint16_t) *)
(* variantCapacity : 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 icuuc (t "icuuc.dll"))
(cffi:use-foreign-library icuuc)

(cffi:defcfun ("uloc_getDisplayVariant" uloc-get-display-variant :convention :cdecl) :int32
  (locale :string)   ; LPCSTR
  (display-locale :string)   ; LPCSTR
  (variant :pointer)   ; WORD* in/out
  (variant-capacity :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 $uloc_getDisplayVariant = Win32::API::More->new('icuuc',
    'int uloc_getDisplayVariant(LPCSTR locale, LPCSTR displayLocale, LPVOID variant, int variantCapacity, LPVOID status)');
# my $ret = $uloc_getDisplayVariant->Call($locale, $displayLocale, $variant, $variantCapacity, $status);
# locale : LPCSTR -> LPCSTR
# displayLocale : LPCSTR -> LPCSTR
# variant : WORD* in/out -> LPVOID
# variantCapacity : 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。