ucnvsel_selectForString

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

UEnumeration* ucnvsel_selectForString(
    const UConverterSelector* sel,
    const WORD* s,
    INT length,
    UErrorCode* status
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucnvsel_selectForString(
    ByRef sel As IntPtr,   ' UConverterSelector*
    ByRef s As UShort,   ' WORD*
    length As Integer,   ' INT
    ByRef status As Integer   ' UErrorCode* in/out
) As IntPtr
End Function

' sel : UConverterSelector*
' s : WORD*
' length : INT
' status : UErrorCode* in/out
Declare PtrSafe Function ucnvsel_selectForString Lib "icuuc" ( _
    ByRef sel As LongPtr, _
    ByRef s As Integer, _
    ByVal length As Long, _
    ByRef status As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ucnvsel_selectForString = ctypes.cdll.icuuc.ucnvsel_selectForString
ucnvsel_selectForString.restype = ctypes.c_void_p
ucnvsel_selectForString.argtypes = [
    ctypes.c_void_p,  # sel : UConverterSelector*
    ctypes.POINTER(ctypes.c_ushort),  # s : WORD*
    ctypes.c_int,  # length : INT
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
ucnvsel_selectForString = Fiddle::Function.new(
  lib['ucnvsel_selectForString'],
  [
    Fiddle::TYPE_VOIDP,  # sel : UConverterSelector*
    Fiddle::TYPE_VOIDP,  # s : WORD*
    Fiddle::TYPE_INT,  # length : INT
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_VOIDP, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn ucnvsel_selectForString(
        sel: *const isize,  // UConverterSelector*
        s: *const u16,  // WORD*
        length: i32,  // INT
        status: *mut i32  // UErrorCode* in/out
    ) -> *mut isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr ucnvsel_selectForString(ref IntPtr sel, ref ushort s, int length, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_ucnvsel_selectForString' -Namespace Win32 -PassThru
# $api::ucnvsel_selectForString(sel, s, length, status)

#uselib "icuuc.dll"
#func global ucnvsel_selectForString "ucnvsel_selectForString" sptr, sptr, sptr, sptr
; ucnvsel_selectForString varptr(sel), varptr(s), length, varptr(status)   ; 戻り値は stat
; sel : UConverterSelector* -> "sptr"
; s : WORD* -> "sptr"
; length : 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")
	procucnvsel_selectForString = icuuc.NewProc("ucnvsel_selectForString")
)

// sel (UConverterSelector*), s (WORD*), length (INT), status (UErrorCode* in/out)
r1, _, err := procucnvsel_selectForString.Call(
	uintptr(sel),
	uintptr(s),
	uintptr(length),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UEnumeration*

function ucnvsel_selectForString(
  sel: Pointer;   // UConverterSelector*
  s: Pointer;   // WORD*
  length: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'ucnvsel_selectForString';

result := DllCall("icuuc\ucnvsel_selectForString"
    , "Ptr", sel   ; UConverterSelector*
    , "Ptr", s   ; WORD*
    , "Int", length   ; INT
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Ptr")   ; return: UEnumeration*

●ucnvsel_selectForString(sel, s, length, status) = DLL("icuuc.dll", "void* ucnvsel_selectForString(void*, void*, int, void*)")
# 呼び出し: ucnvsel_selectForString(sel, s, length, status)
# sel : UConverterSelector* -> "void*"
# s : WORD* -> "void*"
# length : 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 ucnvsel_selectForString(
    sel: [*c]isize, // UConverterSelector*
    s: [*c]u16, // WORD*
    length: i32, // INT
    status: [*c]i32 // UErrorCode* in/out
) callconv(.c) [*c]isize;

proc ucnvsel_selectForString(
    sel: ptr int,  # UConverterSelector*
    s: ptr uint16,  # WORD*
    length: int32,  # INT
    status: ptr int32  # UErrorCode* in/out
): ptr int {.importc: "ucnvsel_selectForString", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
ptrdiff_t* ucnvsel_selectForString(
    ptrdiff_t* sel,   // UConverterSelector*
    ushort* s,   // WORD*
    int length,   // INT
    int* status   // UErrorCode* in/out
);

ccall((:ucnvsel_selectForString, "icuuc.dll"), Ptr{Int},
      (Ptr{Int}, Ptr{UInt16}, Int32, Ptr{Int32}),
      sel, s, length, status)
# sel : UConverterSelector* -> Ptr{Int}
# s : WORD* -> Ptr{UInt16}
# length : INT -> Int32
# status : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
intptr_t* ucnvsel_selectForString(
    intptr_t* sel,
    uint16_t* s,
    int32_t length,
    int32_t* status);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.ucnvsel_selectForString(sel, s, length, status)
-- sel : UConverterSelector*
-- s : WORD*
-- length : 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 ucnvsel_selectForString = lib.func('__cdecl', 'ucnvsel_selectForString', 'intptr_t *', ['intptr_t *', 'uint16_t *', 'int32_t', 'int32_t *']);
// ucnvsel_selectForString(sel, s, length, status)
// sel : UConverterSelector* -> 'intptr_t *'
// s : WORD* -> 'uint16_t *'
// length : 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", {
  ucnvsel_selectForString: { parameters: ["pointer", "pointer", "i32", "pointer"], result: "pointer" },
});
// lib.symbols.ucnvsel_selectForString(sel, s, length, status)
// sel : UConverterSelector* -> "pointer"
// s : WORD* -> "pointer"
// length : 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
intptr_t* ucnvsel_selectForString(
    intptr_t* sel,
    uint16_t* s,
    int32_t length,
    int32_t* status);
C, "icuuc.dll");
// $ffi->ucnvsel_selectForString(sel, s, length, status);
// sel : UConverterSelector*
// s : WORD*
// length : 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);
    Pointer ucnvsel_selectForString(
        LongByReference sel,   // UConverterSelector*
        ShortByReference s,   // WORD*
        int length,   // INT
        IntByReference status   // UErrorCode* in/out
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun ucnvsel_selectForString = ucnvsel_selectForString(
    sel : LibC::SSizeT*,   # UConverterSelector*
    s : UInt16*,   # WORD*
    length : Int32,   # INT
    status : Int32*   # UErrorCode* in/out
  ) : LibC::SSizeT*
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 ucnvsel_selectForStringNative = Pointer<IntPtr> Function(Pointer<IntPtr>, Pointer<Uint16>, Int32, Pointer<Int32>);
typedef ucnvsel_selectForStringDart = Pointer<IntPtr> Function(Pointer<IntPtr>, Pointer<Uint16>, int, Pointer<Int32>);
final ucnvsel_selectForString = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<ucnvsel_selectForStringNative, ucnvsel_selectForStringDart>('ucnvsel_selectForString');
// sel : UConverterSelector* -> Pointer<IntPtr>
// s : WORD* -> Pointer<Uint16>
// length : INT -> Int32
// status : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function ucnvsel_selectForString(
  sel: Pointer;   // UConverterSelector*
  s: Pointer;   // WORD*
  length: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'ucnvsel_selectForString';

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

foreign import ccall safe "ucnvsel_selectForString"
  c_ucnvsel_selectForString :: Ptr CIntPtr -> Ptr Word16 -> Int32 -> Ptr Int32 -> IO (Ptr CIntPtr)
-- sel : UConverterSelector* -> Ptr CIntPtr
-- s : WORD* -> Ptr Word16
-- length : 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 ucnvsel_selectforstring =
  foreign "ucnvsel_selectForString"
    ((ptr intptr_t) @-> (ptr uint16_t) @-> int32_t @-> (ptr int32_t) @-> returning (ptr intptr_t))
(* sel : UConverterSelector* -> (ptr intptr_t) *)
(* s : WORD* -> (ptr uint16_t) *)
(* length : 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 ("ucnvsel_selectForString" ucnvsel-select-for-string :convention :cdecl) :pointer
  (sel :pointer)   ; UConverterSelector*
  (s :pointer)   ; WORD*
  (length :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 $ucnvsel_selectForString = Win32::API::More->new('icuuc',
    'LPVOID ucnvsel_selectForString(LPVOID sel, LPVOID s, int length, LPVOID status)');
# my $ret = $ucnvsel_selectForString->Call($sel, $s, $length, $status);
# sel : UConverterSelector* -> LPVOID
# s : WORD* -> LPVOID
# length : 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。