u_strncmp

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

INT u_strncmp(
    const WORD* ucs1,
    const WORD* ucs2,
    INT n
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function u_strncmp(
    ByRef ucs1 As UShort,   ' WORD*
    ByRef ucs2 As UShort,   ' WORD*
    n As Integer   ' INT
) As Integer
End Function

' ucs1 : WORD*
' ucs2 : WORD*
' n : INT
Declare PtrSafe Function u_strncmp Lib "icuuc" ( _
    ByRef ucs1 As Integer, _
    ByRef ucs2 As Integer, _
    ByVal n 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

u_strncmp = ctypes.cdll.icuuc.u_strncmp
u_strncmp.restype = ctypes.c_int
u_strncmp.argtypes = [
    ctypes.POINTER(ctypes.c_ushort),  # ucs1 : WORD*
    ctypes.POINTER(ctypes.c_ushort),  # ucs2 : WORD*
    ctypes.c_int,  # n : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
u_strncmp = Fiddle::Function.new(
  lib['u_strncmp'],
  [
    Fiddle::TYPE_VOIDP,  # ucs1 : WORD*
    Fiddle::TYPE_VOIDP,  # ucs2 : WORD*
    Fiddle::TYPE_INT,  # n : INT
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn u_strncmp(
        ucs1: *const u16,  // WORD*
        ucs2: *const u16,  // WORD*
        n: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int u_strncmp(ref ushort ucs1, ref ushort ucs2, int n);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_u_strncmp' -Namespace Win32 -PassThru
# $api::u_strncmp(ucs1, ucs2, n)

#uselib "icuuc.dll"
#func global u_strncmp "u_strncmp" sptr, sptr, sptr
; u_strncmp varptr(ucs1), varptr(ucs2), n   ; 戻り値は stat
; ucs1 : WORD* -> "sptr"
; ucs2 : WORD* -> "sptr"
; n : INT -> "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")
	procu_strncmp = icuuc.NewProc("u_strncmp")
)

// ucs1 (WORD*), ucs2 (WORD*), n (INT)
r1, _, err := procu_strncmp.Call(
	uintptr(ucs1),
	uintptr(ucs2),
	uintptr(n),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function u_strncmp(
  ucs1: Pointer;   // WORD*
  ucs2: Pointer;   // WORD*
  n: Integer   // INT
): Integer; cdecl;
  external 'icuuc.dll' name 'u_strncmp';

result := DllCall("icuuc\u_strncmp"
    , "Ptr", ucs1   ; WORD*
    , "Ptr", ucs2   ; WORD*
    , "Int", n   ; INT
    , "Cdecl Int")   ; return: INT

●u_strncmp(ucs1, ucs2, n) = DLL("icuuc.dll", "int u_strncmp(void*, void*, int)")
# 呼び出し: u_strncmp(ucs1, ucs2, n)
# ucs1 : WORD* -> "void*"
# ucs2 : WORD* -> "void*"
# n : INT -> "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 "icuuc" fn u_strncmp(
    ucs1: [*c]u16, // WORD*
    ucs2: [*c]u16, // WORD*
    n: i32 // INT
) callconv(.c) i32;

proc u_strncmp(
    ucs1: ptr uint16,  # WORD*
    ucs2: ptr uint16,  # WORD*
    n: int32  # INT
): int32 {.importc: "u_strncmp", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
int u_strncmp(
    ushort* ucs1,   // WORD*
    ushort* ucs2,   // WORD*
    int n   // INT
);

ccall((:u_strncmp, "icuuc.dll"), Int32,
      (Ptr{UInt16}, Ptr{UInt16}, Int32),
      ucs1, ucs2, n)
# ucs1 : WORD* -> Ptr{UInt16}
# ucs2 : WORD* -> Ptr{UInt16}
# n : INT -> Int32

local ffi = require("ffi")
ffi.cdef[[
int32_t u_strncmp(
    uint16_t* ucs1,
    uint16_t* ucs2,
    int32_t n);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.u_strncmp(ucs1, ucs2, n)
-- ucs1 : WORD*
-- ucs2 : WORD*
-- n : INT
-- 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 u_strncmp = lib.func('__cdecl', 'u_strncmp', 'int32_t', ['uint16_t *', 'uint16_t *', 'int32_t']);
// u_strncmp(ucs1, ucs2, n)
// ucs1 : WORD* -> 'uint16_t *'
// ucs2 : WORD* -> 'uint16_t *'
// n : INT -> '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", {
  u_strncmp: { parameters: ["pointer", "pointer", "i32"], result: "i32" },
});
// lib.symbols.u_strncmp(ucs1, ucs2, n)
// ucs1 : WORD* -> "pointer"
// ucs2 : WORD* -> "pointer"
// n : INT -> "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 u_strncmp(
    uint16_t* ucs1,
    uint16_t* ucs2,
    int32_t n);
C, "icuuc.dll");
// $ffi->u_strncmp(ucs1, ucs2, n);
// ucs1 : WORD*
// ucs2 : WORD*
// n : INT
// 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 u_strncmp(
        ShortByReference ucs1,   // WORD*
        ShortByReference ucs2,   // WORD*
        int n   // INT
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun u_strncmp = u_strncmp(
    ucs1 : UInt16*,   # WORD*
    ucs2 : UInt16*,   # WORD*
    n : Int32   # INT
  ) : 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 u_strncmpNative = Int32 Function(Pointer<Uint16>, Pointer<Uint16>, Int32);
typedef u_strncmpDart = int Function(Pointer<Uint16>, Pointer<Uint16>, int);
final u_strncmp = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<u_strncmpNative, u_strncmpDart>('u_strncmp');
// ucs1 : WORD* -> Pointer<Uint16>
// ucs2 : WORD* -> Pointer<Uint16>
// n : INT -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function u_strncmp(
  ucs1: Pointer;   // WORD*
  ucs2: Pointer;   // WORD*
  n: Integer   // INT
): Integer; cdecl;
  external 'icuuc.dll' name 'u_strncmp';

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

foreign import ccall safe "u_strncmp"
  c_u_strncmp :: Ptr Word16 -> Ptr Word16 -> Int32 -> IO Int32
-- ucs1 : WORD* -> Ptr Word16
-- ucs2 : WORD* -> Ptr Word16
-- n : INT -> 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 u_strncmp =
  foreign "u_strncmp"
    ((ptr uint16_t) @-> (ptr uint16_t) @-> int32_t @-> returning int32_t)
(* ucs1 : WORD* -> (ptr uint16_t) *)
(* ucs2 : WORD* -> (ptr uint16_t) *)
(* n : INT -> 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 ("u_strncmp" u-strncmp :convention :cdecl) :int32
  (ucs1 :pointer)   ; WORD*
  (ucs2 :pointer)   ; WORD*
  (n :int32))   ; INT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $u_strncmp = Win32::API::More->new('icuuc',
    'int u_strncmp(LPVOID ucs1, LPVOID ucs2, int n)');
# my $ret = $u_strncmp->Call($ucs1, $ucs2, $n);
# ucs1 : WORD* -> LPVOID
# ucs2 : WORD* -> LPVOID
# n : INT -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。