utext_char32At

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

INT utext_char32At(
    UText* ut,
    LONGLONG nativeIndex
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function utext_char32At(
    ut As IntPtr,   ' UText* in/out
    nativeIndex As Long   ' LONGLONG
) As Integer
End Function

' ut : UText* in/out
' nativeIndex : LONGLONG
Declare PtrSafe Function utext_char32At Lib "icuuc" ( _
    ByVal ut As LongPtr, _
    ByVal nativeIndex As LongLong) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

utext_char32At = ctypes.cdll.icuuc.utext_char32At
utext_char32At.restype = ctypes.c_int
utext_char32At.argtypes = [
    ctypes.c_void_p,  # ut : UText* in/out
    ctypes.c_longlong,  # nativeIndex : LONGLONG
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
utext_char32At = Fiddle::Function.new(
  lib['utext_char32At'],
  [
    Fiddle::TYPE_VOIDP,  # ut : UText* in/out
    Fiddle::TYPE_LONG_LONG,  # nativeIndex : LONGLONG
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn utext_char32At(
        ut: *mut UText,  // UText* in/out
        nativeIndex: i64  // LONGLONG
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int utext_char32At(IntPtr ut, long nativeIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_utext_char32At' -Namespace Win32 -PassThru
# $api::utext_char32At(ut, nativeIndex)

#uselib "icuuc.dll"
#func global utext_char32At "utext_char32At" sptr, sptr
; utext_char32At varptr(ut), nativeIndex   ; 戻り値は stat
; ut : UText* in/out -> "sptr"
; nativeIndex : LONGLONG -> "sptr"
; ※HSP3.7は int64 引数(64bit値渡し)に非対応です。
; ※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")
	procutext_char32At = icuuc.NewProc("utext_char32At")
)

// ut (UText* in/out), nativeIndex (LONGLONG)
r1, _, err := procutext_char32At.Call(
	uintptr(ut),
	uintptr(nativeIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function utext_char32At(
  ut: Pointer;   // UText* in/out
  nativeIndex: Int64   // LONGLONG
): Integer; cdecl;
  external 'icuuc.dll' name 'utext_char32At';

result := DllCall("icuuc\utext_char32At"
    , "Ptr", ut   ; UText* in/out
    , "Int64", nativeIndex   ; LONGLONG
    , "Cdecl Int")   ; return: INT

●utext_char32At(ut, nativeIndex) = DLL("icuuc.dll", "int utext_char32At(void*, int64)")
# 呼び出し: utext_char32At(ut, nativeIndex)
# ut : UText* in/out -> "void*"
# nativeIndex : LONGLONG -> "int64"
# 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 utext_char32At(
    ut: [*c]UText, // UText* in/out
    nativeIndex: i64 // LONGLONG
) callconv(.c) i32;

proc utext_char32At(
    ut: ptr UText,  # UText* in/out
    nativeIndex: int64  # LONGLONG
): int32 {.importc: "utext_char32At", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
int utext_char32At(
    UText* ut,   // UText* in/out
    long nativeIndex   // LONGLONG
);

ccall((:utext_char32At, "icuuc.dll"), Int32,
      (Ptr{UText}, Int64),
      ut, nativeIndex)
# ut : UText* in/out -> Ptr{UText}
# nativeIndex : LONGLONG -> Int64

local ffi = require("ffi")
ffi.cdef[[
int32_t utext_char32At(
    void* ut,
    int64_t nativeIndex);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.utext_char32At(ut, nativeIndex)
-- ut : UText* in/out
-- nativeIndex : LONGLONG
-- 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 utext_char32At = lib.func('__cdecl', 'utext_char32At', 'int32_t', ['void *', 'int64_t']);
// utext_char32At(ut, nativeIndex)
// ut : UText* in/out -> 'void *'
// nativeIndex : LONGLONG -> 'int64_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", {
  utext_char32At: { parameters: ["pointer", "i64"], result: "i32" },
});
// lib.symbols.utext_char32At(ut, nativeIndex)
// ut : UText* in/out -> "pointer"
// nativeIndex : LONGLONG -> "i64"
// 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 utext_char32At(
    void* ut,
    int64_t nativeIndex);
C, "icuuc.dll");
// $ffi->utext_char32At(ut, nativeIndex);
// ut : UText* in/out
// nativeIndex : LONGLONG
// 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 utext_char32At(
        Pointer ut,   // UText* in/out
        long nativeIndex   // LONGLONG
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun utext_char32At = utext_char32At(
    ut : UText*,   # UText* in/out
    nativeIndex : Int64   # LONGLONG
  ) : 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 utext_char32AtNative = Int32 Function(Pointer<Void>, Int64);
typedef utext_char32AtDart = int Function(Pointer<Void>, int);
final utext_char32At = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<utext_char32AtNative, utext_char32AtDart>('utext_char32At');
// ut : UText* in/out -> Pointer<Void>
// nativeIndex : LONGLONG -> Int64
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function utext_char32At(
  ut: Pointer;   // UText* in/out
  nativeIndex: Int64   // LONGLONG
): Integer; cdecl;
  external 'icuuc.dll' name 'utext_char32At';

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

foreign import ccall safe "utext_char32At"
  c_utext_char32At :: Ptr () -> Int64 -> IO Int32
-- ut : UText* in/out -> Ptr ()
-- nativeIndex : LONGLONG -> Int64
-- 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 utext_char32at =
  foreign "utext_char32At"
    ((ptr void) @-> int64_t @-> returning int32_t)
(* ut : UText* in/out -> (ptr void) *)
(* nativeIndex : LONGLONG -> int64_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 ("utext_char32At" utext-char32-at :convention :cdecl) :int32
  (ut :pointer)   ; UText* in/out
  (native-index :int64))   ; LONGLONG
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $utext_char32At = Win32::API::More->new('icuuc',
    'int utext_char32At(LPVOID ut, INT64 nativeIndex)');
# my $ret = $utext_char32At->Call($ut, $nativeIndex);
# ut : UText* in/out -> LPVOID
# nativeIndex : LONGLONG -> INT64
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。