u_memcmp

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

INT u_memcmp(
    const WORD* buf1,
    const WORD* buf2,
    INT count
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function u_memcmp(
    ByRef buf1 As UShort,   ' WORD*
    ByRef buf2 As UShort,   ' WORD*
    count As Integer   ' INT
) As Integer
End Function

' buf1 : WORD*
' buf2 : WORD*
' count : INT
Declare PtrSafe Function u_memcmp Lib "icuuc" ( _
    ByRef buf1 As Integer, _
    ByRef buf2 As Integer, _
    ByVal count 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_memcmp = ctypes.cdll.icuuc.u_memcmp
u_memcmp.restype = ctypes.c_int
u_memcmp.argtypes = [
    ctypes.POINTER(ctypes.c_ushort),  # buf1 : WORD*
    ctypes.POINTER(ctypes.c_ushort),  # buf2 : WORD*
    ctypes.c_int,  # count : INT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
u_memcmp = Fiddle::Function.new(
  lib['u_memcmp'],
  [
    Fiddle::TYPE_VOIDP,  # buf1 : WORD*
    Fiddle::TYPE_VOIDP,  # buf2 : WORD*
    Fiddle::TYPE_INT,  # count : INT
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn u_memcmp(
        buf1: *const u16,  // WORD*
        buf2: *const u16,  // WORD*
        count: 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_memcmp(ref ushort buf1, ref ushort buf2, int count);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_u_memcmp' -Namespace Win32 -PassThru
# $api::u_memcmp(buf1, buf2, count)

#uselib "icuuc.dll"
#func global u_memcmp "u_memcmp" sptr, sptr, sptr
; u_memcmp varptr(buf1), varptr(buf2), count   ; 戻り値は stat
; buf1 : WORD* -> "sptr"
; buf2 : WORD* -> "sptr"
; count : 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。

#uselib "icuuc.dll"
#cfunc global u_memcmp "u_memcmp" var, var, int
; res = u_memcmp(buf1, buf2, count)
; buf1 : WORD* -> "var"
; buf2 : WORD* -> "var"
; count : INT -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; INT u_memcmp(WORD* buf1, WORD* buf2, INT count)
#uselib "icuuc.dll"
#cfunc global u_memcmp "u_memcmp" var, var, int
; res = u_memcmp(buf1, buf2, count)
; buf1 : WORD* -> "var"
; buf2 : WORD* -> "var"
; count : INT -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	procu_memcmp = icuuc.NewProc("u_memcmp")
)

// buf1 (WORD*), buf2 (WORD*), count (INT)
r1, _, err := procu_memcmp.Call(
	uintptr(buf1),
	uintptr(buf2),
	uintptr(count),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function u_memcmp(
  buf1: Pointer;   // WORD*
  buf2: Pointer;   // WORD*
  count: Integer   // INT
): Integer; cdecl;
  external 'icuuc.dll' name 'u_memcmp';

result := DllCall("icuuc\u_memcmp"
    , "Ptr", buf1   ; WORD*
    , "Ptr", buf2   ; WORD*
    , "Int", count   ; INT
    , "Cdecl Int")   ; return: INT

●u_memcmp(buf1, buf2, count) = DLL("icuuc.dll", "int u_memcmp(void*, void*, int)")
# 呼び出し: u_memcmp(buf1, buf2, count)
# buf1 : WORD* -> "void*"
# buf2 : WORD* -> "void*"
# count : 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。