ucal_add

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

void ucal_add(
    void** cal,
    UCalendarDateFields field,
    INT amount,
    UErrorCode* status
);

<DllImport("icuin.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Sub ucal_add(
    cal As IntPtr,   ' void** in/out
    field As Integer,   ' UCalendarDateFields
    amount As Integer,   ' INT
    ByRef status As Integer   ' UErrorCode* in/out
)
End Sub

' cal : void** in/out
' field : UCalendarDateFields
' amount : INT
' status : UErrorCode* in/out
Declare PtrSafe Sub ucal_add Lib "icuin" ( _
    ByVal cal As LongPtr, _
    ByVal field As Long, _
    ByVal amount As Long, _
    ByRef status As Long)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ucal_add = ctypes.cdll.icuin.ucal_add
ucal_add.restype = None
ucal_add.argtypes = [
    ctypes.c_void_p,  # cal : void** in/out
    ctypes.c_int,  # field : UCalendarDateFields
    ctypes.c_int,  # amount : INT
    ctypes.c_void_p,  # status : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuin.dll')
ucal_add = Fiddle::Function.new(
  lib['ucal_add'],
  [
    Fiddle::TYPE_VOIDP,  # cal : void** in/out
    Fiddle::TYPE_INT,  # field : UCalendarDateFields
    Fiddle::TYPE_INT,  # amount : INT
    Fiddle::TYPE_VOIDP,  # status : UErrorCode* in/out
  ],
  Fiddle::TYPE_VOID, Fiddle::Function::CDECL)

#[link(name = "icuin")]
extern "C" {
    fn ucal_add(
        cal: *mut *mut (),  // void** in/out
        field: i32,  // UCalendarDateFields
        amount: i32,  // INT
        status: *mut i32  // UErrorCode* in/out
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuin.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void ucal_add(IntPtr cal, int field, int amount, ref int status);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuin_ucal_add' -Namespace Win32 -PassThru
# $api::ucal_add(cal, field, amount, status)

#uselib "icuin.dll"
#func global ucal_add "ucal_add" sptr, sptr, sptr, sptr
; ucal_add cal, field, amount, status
; cal : void** in/out -> "sptr"
; field : UCalendarDateFields -> "sptr"
; amount : INT -> "sptr"
; status : UErrorCode* in/out -> "sptr"

#uselib "icuin.dll"
#func global ucal_add "ucal_add" sptr, int, int, int
; ucal_add cal, field, amount, status
; cal : void** in/out -> "sptr"
; field : UCalendarDateFields -> "int"
; amount : INT -> "int"
; status : UErrorCode* in/out -> "int"

; void ucal_add(void** cal, UCalendarDateFields field, INT amount, UErrorCode* status)
#uselib "icuin.dll"
#func global ucal_add "ucal_add" intptr, int, int, int
; ucal_add cal, field, amount, status
; cal : void** in/out -> "intptr"
; field : UCalendarDateFields -> "int"
; amount : INT -> "int"
; status : UErrorCode* in/out -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	icuin = windows.NewLazySystemDLL("icuin.dll")
	procucal_add = icuin.NewProc("ucal_add")
)

// cal (void** in/out), field (UCalendarDateFields), amount (INT), status (UErrorCode* in/out)
r1, _, err := procucal_add.Call(
	uintptr(cal),
	uintptr(field),
	uintptr(amount),
	uintptr(status),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure ucal_add(
  cal: Pointer;   // void** in/out
  field: Integer;   // UCalendarDateFields
  amount: Integer;   // INT
  status: Pointer   // UErrorCode* in/out
); cdecl;
  external 'icuin.dll' name 'ucal_add';

result := DllCall("icuin\ucal_add"
    , "Ptr", cal   ; void** in/out
    , "Int", field   ; UCalendarDateFields
    , "Int", amount   ; INT
    , "Ptr", status   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: void

●ucal_add(cal, field, amount, status) = DLL("icuin.dll", "int ucal_add(void*, int, int, void*)")
# 呼び出し: ucal_add(cal, field, amount, status)
# cal : void** in/out -> "void*"
# field : UCalendarDateFields -> "int"
# amount : 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。