ucnvsel_selectForUTF8

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

UEnumeration* ucnvsel_selectForUTF8(
    const UConverterSelector* sel,
    LPCSTR s,
    INT length,
    UErrorCode* status
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucnvsel_selectForUTF8(
    ByRef sel As IntPtr,   ' UConverterSelector*
    <MarshalAs(UnmanagedType.LPStr)> s As String,   ' LPCSTR
    length As Integer,   ' INT
    ByRef status As Integer   ' UErrorCode* in/out
) As IntPtr
End Function

' sel : UConverterSelector*
' s : LPCSTR
' length : INT
' status : UErrorCode* in/out
Declare PtrSafe Function ucnvsel_selectForUTF8 Lib "icuuc" ( _
    ByRef sel As LongPtr, _
    ByVal s As String, _
    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_selectForUTF8 = ctypes.cdll.icuuc.ucnvsel_selectForUTF8
ucnvsel_selectForUTF8.restype = ctypes.c_void_p
ucnvsel_selectForUTF8.argtypes = [
    ctypes.c_void_p,  # sel : UConverterSelector*
    wintypes.LPCSTR,  # s : LPCSTR
    ctypes.c_int,  # length : INT
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
ucnvsel_selectForUTF8 = Fiddle::Function.new(
  lib['ucnvsel_selectForUTF8'],
  [
    Fiddle::TYPE_VOIDP,  # sel : UConverterSelector*
    Fiddle::TYPE_VOIDP,  # s : LPCSTR
    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_selectForUTF8(
        sel: *const isize,  // UConverterSelector*
        s: *const u8,  // LPCSTR
        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_selectForUTF8(ref IntPtr sel, [MarshalAs(UnmanagedType.LPStr)] string s, int length, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_ucnvsel_selectForUTF8' -Namespace Win32 -PassThru
# $api::ucnvsel_selectForUTF8(sel, s, length, status)

#uselib "icuuc.dll"
#func global ucnvsel_selectForUTF8 "ucnvsel_selectForUTF8" sptr, sptr, sptr, sptr
; ucnvsel_selectForUTF8 varptr(sel), s, length, varptr(status)   ; 戻り値は stat
; sel : UConverterSelector* -> "sptr"
; s : LPCSTR -> "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_selectForUTF8 = icuuc.NewProc("ucnvsel_selectForUTF8")
)

// sel (UConverterSelector*), s (LPCSTR), length (INT), status (UErrorCode* in/out)
r1, _, err := procucnvsel_selectForUTF8.Call(
	uintptr(sel),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(s))),
	uintptr(length),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UEnumeration*

function ucnvsel_selectForUTF8(
  sel: Pointer;   // UConverterSelector*
  s: PAnsiChar;   // LPCSTR
  length: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'ucnvsel_selectForUTF8';

result := DllCall("icuuc\ucnvsel_selectForUTF8"
    , "Ptr", sel   ; UConverterSelector*
    , "AStr", s   ; LPCSTR
    , "Int", length   ; INT
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Ptr")   ; return: UEnumeration*

●ucnvsel_selectForUTF8(sel, s, length, status) = DLL("icuuc.dll", "void* ucnvsel_selectForUTF8(void*, char*, int, void*)")
# 呼び出し: ucnvsel_selectForUTF8(sel, s, length, status)
# sel : UConverterSelector* -> "void*"
# s : LPCSTR -> "char*"
# 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_selectForUTF8(
    sel: [*c]isize, // UConverterSelector*
    s: [*c]const u8, // LPCSTR
    length: i32, // INT
    status: [*c]i32 // UErrorCode* in/out
) callconv(.c) [*c]isize;

proc ucnvsel_selectForUTF8(
    sel: ptr int,  # UConverterSelector*
    s: cstring,  # LPCSTR
    length: int32,  # INT
    status: ptr int32  # UErrorCode* in/out
): ptr int {.importc: "ucnvsel_selectForUTF8", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
ptrdiff_t* ucnvsel_selectForUTF8(
    ptrdiff_t* sel,   // UConverterSelector*
    const(char)* s,   // LPCSTR
    int length,   // INT
    int* status   // UErrorCode* in/out
);

ccall((:ucnvsel_selectForUTF8, "icuuc.dll"), Ptr{Int},
      (Ptr{Int}, Cstring, Int32, Ptr{Int32}),
      sel, s, length, status)
# sel : UConverterSelector* -> Ptr{Int}
# s : LPCSTR -> Cstring
# length : INT -> Int32
# status : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
intptr_t* ucnvsel_selectForUTF8(
    intptr_t* sel,
    const char* s,
    int32_t length,
    int32_t* status);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.ucnvsel_selectForUTF8(sel, s, length, status)
-- sel : UConverterSelector*
-- s : LPCSTR
-- 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_selectForUTF8 = lib.func('__cdecl', 'ucnvsel_selectForUTF8', 'intptr_t *', ['intptr_t *', 'str', 'int32_t', 'int32_t *']);
// ucnvsel_selectForUTF8(sel, s, length, status)
// sel : UConverterSelector* -> 'intptr_t *'
// s : LPCSTR -> 'str'
// 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_selectForUTF8: { parameters: ["pointer", "buffer", "i32", "pointer"], result: "pointer" },
});
// lib.symbols.ucnvsel_selectForUTF8(sel, s, length, status)
// sel : UConverterSelector* -> "pointer"
// s : LPCSTR -> "buffer"
// 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_selectForUTF8(
    intptr_t* sel,
    const char* s,
    int32_t length,
    int32_t* status);
C, "icuuc.dll");
// $ffi->ucnvsel_selectForUTF8(sel, s, length, status);
// sel : UConverterSelector*
// s : LPCSTR
// 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_selectForUTF8(
        LongByReference sel,   // UConverterSelector*
        String s,   // LPCSTR
        int length,   // INT
        IntByReference status   // UErrorCode* in/out
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun ucnvsel_selectForUTF8 = ucnvsel_selectForUTF8(
    sel : LibC::SSizeT*,   # UConverterSelector*
    s : UInt8*,   # LPCSTR
    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_selectForUTF8Native = Pointer<IntPtr> Function(Pointer<IntPtr>, Pointer<Utf8>, Int32, Pointer<Int32>);
typedef ucnvsel_selectForUTF8Dart = Pointer<IntPtr> Function(Pointer<IntPtr>, Pointer<Utf8>, int, Pointer<Int32>);
final ucnvsel_selectForUTF8 = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<ucnvsel_selectForUTF8Native, ucnvsel_selectForUTF8Dart>('ucnvsel_selectForUTF8');
// sel : UConverterSelector* -> Pointer<IntPtr>
// s : LPCSTR -> Pointer<Utf8>
// 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_selectForUTF8(
  sel: Pointer;   // UConverterSelector*
  s: PAnsiChar;   // LPCSTR
  length: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'ucnvsel_selectForUTF8';

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

foreign import ccall safe "ucnvsel_selectForUTF8"
  c_ucnvsel_selectForUTF8 :: Ptr CIntPtr -> CString -> Int32 -> Ptr Int32 -> IO (Ptr CIntPtr)
-- sel : UConverterSelector* -> Ptr CIntPtr
-- s : LPCSTR -> CString
-- 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_selectforutf8 =
  foreign "ucnvsel_selectForUTF8"
    ((ptr intptr_t) @-> string @-> int32_t @-> (ptr int32_t) @-> returning (ptr intptr_t))
(* sel : UConverterSelector* -> (ptr intptr_t) *)
(* s : LPCSTR -> string *)
(* 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_selectForUTF8" ucnvsel-select-for-utf8 :convention :cdecl) :pointer
  (sel :pointer)   ; UConverterSelector*
  (s :string)   ; LPCSTR
  (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_selectForUTF8 = Win32::API::More->new('icuuc',
    'LPVOID ucnvsel_selectForUTF8(LPVOID sel, LPCSTR s, int length, LPVOID status)');
# my $ret = $ucnvsel_selectForUTF8->Call($sel, $s, $length, $status);
# sel : UConverterSelector* -> LPVOID
# s : LPCSTR -> LPCSTR
# 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。