ucal_getTimeZoneTransitionDate

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

CHAR ucal_getTimeZoneTransitionDate(
    const void** cal,
    UTimeZoneTransitionType type,
    DOUBLE* transition,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucal_getTimeZoneTransitionDate(
    cal As IntPtr,   ' void**
    type As Integer,   ' UTimeZoneTransitionType
    ByRef transition As Double,   ' DOUBLE* in/out
    ByRef status As Integer   ' UErrorCode* in/out
) As SByte
End Function

' cal : void**
' type : UTimeZoneTransitionType
' transition : DOUBLE* in/out
' status : UErrorCode* in/out
Declare PtrSafe Function ucal_getTimeZoneTransitionDate Lib "icuin" ( _
    ByVal cal As LongPtr, _
    ByVal type As Long, _
    ByRef transition As Double, _
    ByRef status As Long) As Byte
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ucal_getTimeZoneTransitionDate = ctypes.cdll.icuin.ucal_getTimeZoneTransitionDate
ucal_getTimeZoneTransitionDate.restype = ctypes.c_byte
ucal_getTimeZoneTransitionDate.argtypes = [
    ctypes.c_void_p,  # cal : void**
    ctypes.c_int,  # type : UTimeZoneTransitionType
    ctypes.POINTER(ctypes.c_double),  # transition : DOUBLE* in/out
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
ucal_getTimeZoneTransitionDate = Fiddle::Function.new(
  lib['ucal_getTimeZoneTransitionDate'],
  [
    Fiddle::TYPE_VOIDP,  # cal : void**
    Fiddle::TYPE_INT,  # type : UTimeZoneTransitionType
    Fiddle::TYPE_VOIDP,  # transition : DOUBLE* in/out
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_CHAR, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn ucal_getTimeZoneTransitionDate(
        cal: *const *const (),  // void**
        type: i32,  // UTimeZoneTransitionType
        transition: *mut f64,  // DOUBLE* in/out
        status: *mut i32  // UErrorCode* in/out
    ) -> i8;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern sbyte ucal_getTimeZoneTransitionDate(IntPtr cal, int type, ref double transition, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_ucal_getTimeZoneTransitionDate' -Namespace Win32 -PassThru
# $api::ucal_getTimeZoneTransitionDate(cal, type, transition, status)

#uselib "icuin.dll"
#func global ucal_getTimeZoneTransitionDate "ucal_getTimeZoneTransitionDate" sptr, sptr, sptr, sptr
; ucal_getTimeZoneTransitionDate cal, type, varptr(transition), varptr(status)   ; 戻り値は stat
; cal : void** -> "sptr"
; type : UTimeZoneTransitionType -> "sptr"
; transition : DOUBLE* in/out -> "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 (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procucal_getTimeZoneTransitionDate = icuin.NewProc("ucal_getTimeZoneTransitionDate")
)

// cal (void**), type (UTimeZoneTransitionType), transition (DOUBLE* in/out), status (UErrorCode* in/out)
r1, _, err := procucal_getTimeZoneTransitionDate.Call(
	uintptr(cal),
	uintptr(type),
	uintptr(transition),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // CHAR

function ucal_getTimeZoneTransitionDate(
  cal: Pointer;   // void**
  type: Integer;   // UTimeZoneTransitionType
  transition: Pointer;   // DOUBLE* in/out
  status: Pointer   // UErrorCode* in/out
): Shortint; cdecl;
  external 'icuin.dll' name 'ucal_getTimeZoneTransitionDate';

result := DllCall("icuin\ucal_getTimeZoneTransitionDate"
    , "Ptr", cal   ; void**
    , "Int", type   ; UTimeZoneTransitionType
    , "Ptr", transition   ; DOUBLE* in/out
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Char")   ; return: CHAR

●ucal_getTimeZoneTransitionDate(cal, type, transition, status) = DLL("icuin.dll", "char ucal_getTimeZoneTransitionDate(void*, int, void*, void*)")
# 呼び出し: ucal_getTimeZoneTransitionDate(cal, type, transition, status)
# cal : void** -> "void*"
# type : UTimeZoneTransitionType -> "int"
# transition : DOUBLE* in/out -> "void*"
# 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 "icuin" fn ucal_getTimeZoneTransitionDate(
    cal: ?*anyopaque, // void**
    type: i32, // UTimeZoneTransitionType
    transition: [*c]f64, // DOUBLE* in/out
    status: [*c]i32 // UErrorCode* in/out
) callconv(.c) i8;

proc ucal_getTimeZoneTransitionDate(
    cal: pointer,  # void**
    `type`: int32,  # UTimeZoneTransitionType
    transition: ptr float64,  # DOUBLE* in/out
    status: ptr int32  # UErrorCode* in/out
): int8 {.importc: "ucal_getTimeZoneTransitionDate", cdecl, dynlib: "icuin.dll".}

pragma(lib, "icuin");
extern(C)
byte ucal_getTimeZoneTransitionDate(
    void** cal,   // void**
    int type,   // UTimeZoneTransitionType
    double* transition,   // DOUBLE* in/out
    int* status   // UErrorCode* in/out
);

ccall((:ucal_getTimeZoneTransitionDate, "icuin.dll"), Int8,
      (Ptr{Cvoid}, Int32, Ptr{Float64}, Ptr{Int32}),
      cal, type, transition, status)
# cal : void** -> Ptr{Cvoid}
# type : UTimeZoneTransitionType -> Int32
# transition : DOUBLE* in/out -> Ptr{Float64}
# status : UErrorCode* in/out -> Ptr{Int32}

local ffi = require("ffi")
ffi.cdef[[
int8_t ucal_getTimeZoneTransitionDate(
    void** cal,
    int32_t type,
    double* transition,
    int32_t* status);
]]
local icuin = ffi.load("icuin")
-- icuin.ucal_getTimeZoneTransitionDate(cal, type, transition, status)
-- cal : void**
-- type : UTimeZoneTransitionType
-- transition : DOUBLE* in/out
-- 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('icuin.dll');
const ucal_getTimeZoneTransitionDate = lib.func('__cdecl', 'ucal_getTimeZoneTransitionDate', 'int8_t', ['void *', 'int32_t', 'double *', 'int32_t *']);
// ucal_getTimeZoneTransitionDate(cal, type, transition, status)
// cal : void** -> 'void *'
// type : UTimeZoneTransitionType -> 'int32_t'
// transition : DOUBLE* in/out -> 'double *'
// 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("icuin.dll", {
  ucal_getTimeZoneTransitionDate: { parameters: ["pointer", "i32", "pointer", "pointer"], result: "i8" },
});
// lib.symbols.ucal_getTimeZoneTransitionDate(cal, type, transition, status)
// cal : void** -> "pointer"
// type : UTimeZoneTransitionType -> "i32"
// transition : DOUBLE* in/out -> "pointer"
// 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
int8_t ucal_getTimeZoneTransitionDate(
    void** cal,
    int32_t type,
    double* transition,
    int32_t* status);
C, "icuin.dll");
// $ffi->ucal_getTimeZoneTransitionDate(cal, type, transition, status);
// cal : void**
// type : UTimeZoneTransitionType
// transition : DOUBLE* in/out
// 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 Icuin extends Library {
    Icuin INSTANCE = Native.load("icuin", Icuin.class);
    byte ucal_getTimeZoneTransitionDate(
        Pointer cal,   // void**
        int type,   // UTimeZoneTransitionType
        DoubleByReference transition,   // DOUBLE* in/out
        IntByReference status   // UErrorCode* in/out
    );
}

@[Link("icuin")]
lib Libicuin
  fun ucal_getTimeZoneTransitionDate = ucal_getTimeZoneTransitionDate(
    cal : Void**,   # void**
    type_ : Int32,   # UTimeZoneTransitionType
    transition : Float64*,   # DOUBLE* in/out
    status : Int32*   # UErrorCode* in/out
  ) : Int8
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 ucal_getTimeZoneTransitionDateNative = Int8 Function(Pointer<Void>, Int32, Pointer<Double>, Pointer<Int32>);
typedef ucal_getTimeZoneTransitionDateDart = int Function(Pointer<Void>, int, Pointer<Double>, Pointer<Int32>);
final ucal_getTimeZoneTransitionDate = DynamicLibrary.open('icuin.dll')
    .lookupFunction<ucal_getTimeZoneTransitionDateNative, ucal_getTimeZoneTransitionDateDart>('ucal_getTimeZoneTransitionDate');
// cal : void** -> Pointer<Void>
// type : UTimeZoneTransitionType -> Int32
// transition : DOUBLE* in/out -> Pointer<Double>
// status : UErrorCode* in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function ucal_getTimeZoneTransitionDate(
  cal: Pointer;   // void**
  type: Integer;   // UTimeZoneTransitionType
  transition: Pointer;   // DOUBLE* in/out
  status: Pointer   // UErrorCode* in/out
): Shortint; cdecl;
  external 'icuin.dll' name 'ucal_getTimeZoneTransitionDate';

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

foreign import ccall safe "ucal_getTimeZoneTransitionDate"
  c_ucal_getTimeZoneTransitionDate :: Ptr () -> Int32 -> Ptr CDouble -> Ptr Int32 -> IO Int8
-- cal : void** -> Ptr ()
-- type : UTimeZoneTransitionType -> Int32
-- transition : DOUBLE* in/out -> Ptr CDouble
-- 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 ucal_gettimezonetransitiondate =
  foreign "ucal_getTimeZoneTransitionDate"
    ((ptr void) @-> int32_t @-> (ptr double) @-> (ptr int32_t) @-> returning int8_t)
(* cal : void** -> (ptr void) *)
(* type : UTimeZoneTransitionType -> int32_t *)
(* transition : DOUBLE* in/out -> (ptr double) *)
(* 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 icuin (t "icuin.dll"))
(cffi:use-foreign-library icuin)

(cffi:defcfun ("ucal_getTimeZoneTransitionDate" ucal-get-time-zone-transition-date :convention :cdecl) :int8
  (cal :pointer)   ; void**
  (type :int32)   ; UTimeZoneTransitionType
  (transition :pointer)   ; DOUBLE* in/out
  (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 $ucal_getTimeZoneTransitionDate = Win32::API::More->new('icuin',
    'char ucal_getTimeZoneTransitionDate(LPVOID cal, int type, LPVOID transition, LPVOID status)');
# my $ret = $ucal_getTimeZoneTransitionDate->Call($cal, $type, $transition, $status);
# cal : void** -> LPVOID
# type : UTimeZoneTransitionType -> int
# transition : DOUBLE* in/out -> LPVOID
# 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。