ucnv_openPackage

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

UConverter* ucnv_openPackage(
    LPCSTR packageName,
    LPCSTR converterName,
    UErrorCode* err
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucnv_openPackage(
    <MarshalAs(UnmanagedType.LPStr)> packageName As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> converterName As String,   ' LPCSTR
    ByRef err As Integer   ' UErrorCode* in/out
) As IntPtr
End Function

' packageName : LPCSTR
' converterName : LPCSTR
' err : UErrorCode* in/out
Declare PtrSafe Function ucnv_openPackage Lib "icuuc" ( _
    ByVal packageName As String, _
    ByVal converterName As String, _
    ByRef err 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

ucnv_openPackage = ctypes.cdll.icuuc.ucnv_openPackage
ucnv_openPackage.restype = ctypes.c_void_p
ucnv_openPackage.argtypes = [
    wintypes.LPCSTR,  # packageName : LPCSTR
    wintypes.LPCSTR,  # converterName : LPCSTR
    ctypes.c_void_p,  # err : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
ucnv_openPackage = Fiddle::Function.new(
  lib['ucnv_openPackage'],
  [
    Fiddle::TYPE_VOIDP,  # packageName : LPCSTR
    Fiddle::TYPE_VOIDP,  # converterName : LPCSTR
    Fiddle::TYPE_VOIDP,  # err : UErrorCode* in/out
  ],
  Fiddle::TYPE_VOIDP, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn ucnv_openPackage(
        packageName: *const u8,  // LPCSTR
        converterName: *const u8,  // LPCSTR
        err: *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 ucnv_openPackage([MarshalAs(UnmanagedType.LPStr)] string packageName, [MarshalAs(UnmanagedType.LPStr)] string converterName, ref int err);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_ucnv_openPackage' -Namespace Win32 -PassThru
# $api::ucnv_openPackage(packageName, converterName, err)

#uselib "icuuc.dll"
#func global ucnv_openPackage "ucnv_openPackage" sptr, sptr, sptr
; ucnv_openPackage packageName, converterName, varptr(err)   ; 戻り値は stat
; packageName : LPCSTR -> "sptr"
; converterName : LPCSTR -> "sptr"
; err : 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")
	procucnv_openPackage = icuuc.NewProc("ucnv_openPackage")
)

// packageName (LPCSTR), converterName (LPCSTR), err (UErrorCode* in/out)
r1, _, err := procucnv_openPackage.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(packageName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(converterName))),
	uintptr(err),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // UConverter*

function ucnv_openPackage(
  packageName: PAnsiChar;   // LPCSTR
  converterName: PAnsiChar;   // LPCSTR
  err: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'ucnv_openPackage';

result := DllCall("icuuc\ucnv_openPackage"
    , "AStr", packageName   ; LPCSTR
    , "AStr", converterName   ; LPCSTR
    , "Ptr", err   ; UErrorCode* in/out
    , "Cdecl Ptr")   ; return: UConverter*

●ucnv_openPackage(packageName, converterName, err) = DLL("icuuc.dll", "void* ucnv_openPackage(char*, char*, void*)")
# 呼び出し: ucnv_openPackage(packageName, converterName, err)
# packageName : LPCSTR -> "char*"
# converterName : LPCSTR -> "char*"
# err : 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 ucnv_openPackage(
    packageName: [*c]const u8, // LPCSTR
    converterName: [*c]const u8, // LPCSTR
    err: [*c]i32 // UErrorCode* in/out
) callconv(.c) [*c]isize;

proc ucnv_openPackage(
    packageName: cstring,  # LPCSTR
    converterName: cstring,  # LPCSTR
    err: ptr int32  # UErrorCode* in/out
): ptr int {.importc: "ucnv_openPackage", cdecl, dynlib: "icuuc.dll".}

pragma(lib, "icuuc");
extern(C)
ptrdiff_t* ucnv_openPackage(
    const(char)* packageName,   // LPCSTR
    const(char)* converterName,   // LPCSTR
    int* err   // UErrorCode* in/out
);

ccall((:ucnv_openPackage, "icuuc.dll"), Ptr{Int},
      (Cstring, Cstring, Ptr{Int32}),
      packageName, converterName, err)
# packageName : LPCSTR -> Cstring
# converterName : LPCSTR -> Cstring
# err : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
intptr_t* ucnv_openPackage(
    const char* packageName,
    const char* converterName,
    int32_t* err);
]]
local icuuc = ffi.load("icuuc")
-- icuuc.ucnv_openPackage(packageName, converterName, err)
-- packageName : LPCSTR
-- converterName : LPCSTR
-- err : 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 ucnv_openPackage = lib.func('__cdecl', 'ucnv_openPackage', 'intptr_t *', ['str', 'str', 'int32_t *']);
// ucnv_openPackage(packageName, converterName, err)
// packageName : LPCSTR -> 'str'
// converterName : LPCSTR -> 'str'
// err : 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", {
  ucnv_openPackage: { parameters: ["buffer", "buffer", "pointer"], result: "pointer" },
});
// lib.symbols.ucnv_openPackage(packageName, converterName, err)
// packageName : LPCSTR -> "buffer"
// converterName : LPCSTR -> "buffer"
// err : 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* ucnv_openPackage(
    const char* packageName,
    const char* converterName,
    int32_t* err);
C, "icuuc.dll");
// $ffi->ucnv_openPackage(packageName, converterName, err);
// packageName : LPCSTR
// converterName : LPCSTR
// err : 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 ucnv_openPackage(
        String packageName,   // LPCSTR
        String converterName,   // LPCSTR
        IntByReference err   // UErrorCode* in/out
    );
}

@[Link("icuuc")]
lib Libicuuc
  fun ucnv_openPackage = ucnv_openPackage(
    packageName : UInt8*,   # LPCSTR
    converterName : UInt8*,   # LPCSTR
    err : 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 ucnv_openPackageNative = Pointer<IntPtr> Function(Pointer<Utf8>, Pointer<Utf8>, Pointer<Int32>);
typedef ucnv_openPackageDart = Pointer<IntPtr> Function(Pointer<Utf8>, Pointer<Utf8>, Pointer<Int32>);
final ucnv_openPackage = DynamicLibrary.open('icuuc.dll')
    .lookupFunction<ucnv_openPackageNative, ucnv_openPackageDart>('ucnv_openPackage');
// packageName : LPCSTR -> Pointer<Utf8>
// converterName : LPCSTR -> Pointer<Utf8>
// err : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function ucnv_openPackage(
  packageName: PAnsiChar;   // LPCSTR
  converterName: PAnsiChar;   // LPCSTR
  err: Pointer   // UErrorCode* in/out
): Pointer; cdecl;
  external 'icuuc.dll' name 'ucnv_openPackage';

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

foreign import ccall safe "ucnv_openPackage"
  c_ucnv_openPackage :: CString -> CString -> Ptr Int32 -> IO (Ptr CIntPtr)
-- packageName : LPCSTR -> CString
-- converterName : LPCSTR -> CString
-- err : 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 ucnv_openpackage =
  foreign "ucnv_openPackage"
    (string @-> string @-> (ptr int32_t) @-> returning (ptr intptr_t))
(* packageName : LPCSTR -> string *)
(* converterName : LPCSTR -> string *)
(* err : 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 ("ucnv_openPackage" ucnv-open-package :convention :cdecl) :pointer
  (package-name :string)   ; LPCSTR
  (converter-name :string)   ; LPCSTR
  (err :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 $ucnv_openPackage = Win32::API::More->new('icuuc',
    'LPVOID ucnv_openPackage(LPCSTR packageName, LPCSTR converterName, LPVOID err)');
# my $ret = $ucnv_openPackage->Call($packageName, $converterName, $err);
# packageName : LPCSTR -> LPCSTR
# converterName : LPCSTR -> LPCSTR
# err : 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。