ucurr_countCurrencies

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

INT ucurr_countCurrencies(
    LPCSTR locale,
    DOUBLE date,
    UErrorCode* ec
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function ucurr_countCurrencies(
    <MarshalAs(UnmanagedType.LPStr)> locale As String,   ' LPCSTR
    [date] As Double,   ' DOUBLE
    ByRef ec As Integer   ' UErrorCode* in/out
) As Integer
End Function

' locale : LPCSTR
' date : DOUBLE
' ec : UErrorCode* in/out
Declare PtrSafe Function ucurr_countCurrencies Lib "icuuc" ( _
    ByVal locale As String, _
    ByVal date As Double, _
    ByRef ec As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

ucurr_countCurrencies = ctypes.cdll.icuuc.ucurr_countCurrencies
ucurr_countCurrencies.restype = ctypes.c_int
ucurr_countCurrencies.argtypes = [
    wintypes.LPCSTR,  # locale : LPCSTR
    ctypes.c_double,  # date : DOUBLE
    ctypes.c_void_p,  # ec : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
ucurr_countCurrencies = Fiddle::Function.new(
  lib['ucurr_countCurrencies'],
  [
    Fiddle::TYPE_VOIDP,  # locale : LPCSTR
    Fiddle::TYPE_DOUBLE,  # date : DOUBLE
    Fiddle::TYPE_VOIDP,  # ec : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn ucurr_countCurrencies(
        locale: *const u8,  // LPCSTR
        date: f64,  // DOUBLE
        ec: *mut i32  // UErrorCode* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("icuuc.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern int ucurr_countCurrencies([MarshalAs(UnmanagedType.LPStr)] string locale, double date, ref int ec);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_ucurr_countCurrencies' -Namespace Win32 -PassThru
# $api::ucurr_countCurrencies(locale, date, ec)

#uselib "icuuc.dll"
#func global ucurr_countCurrencies "ucurr_countCurrencies" sptr, double, sptr
; ucurr_countCurrencies locale, date, ec   ; 戻り値は stat
; locale : LPCSTR -> "sptr"
; date : DOUBLE -> "double"
; ec : 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。

#uselib "icuuc.dll"
#cfunc global ucurr_countCurrencies "ucurr_countCurrencies" str, double, int
; res = ucurr_countCurrencies(locale, date, ec)
; locale : LPCSTR -> "str"
; date : DOUBLE -> "double"
; ec : UErrorCode* in/out -> "int"

; INT ucurr_countCurrencies(LPCSTR locale, DOUBLE date, UErrorCode* ec)
#uselib "icuuc.dll"
#cfunc global ucurr_countCurrencies "ucurr_countCurrencies" str, double, int
; res = ucurr_countCurrencies(locale, date, ec)
; locale : LPCSTR -> "str"
; date : DOUBLE -> "double"
; ec : UErrorCode* in/out -> "int"

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	procucurr_countCurrencies = icuuc.NewProc("ucurr_countCurrencies")
)

// locale (LPCSTR), date (DOUBLE), ec (UErrorCode* in/out)
r1, _, err := procucurr_countCurrencies.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(locale))),
	uintptr(math.Float64bits(date)),
	uintptr(ec),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT
// 注意: float/double 引数は proc.Call では XMM レジスタに渡せません。
// windows.SyscallN(proc.Addr(), math.Float64bits(x), ...) もしくは cgo を使用してください。

function ucurr_countCurrencies(
  locale: PAnsiChar;   // LPCSTR
  date: Double;   // DOUBLE
  ec: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'ucurr_countCurrencies';

result := DllCall("icuuc\ucurr_countCurrencies"
    , "AStr", locale   ; LPCSTR
    , "Double", date   ; DOUBLE
    , "Ptr", ec   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

●ucurr_countCurrencies(locale, date, ec) = DLL("icuuc.dll", "int ucurr_countCurrencies(char*, double, void*)")
# 呼び出し: ucurr_countCurrencies(locale, date, ec)
# locale : LPCSTR -> "char*"
# date : DOUBLE -> "double"
# ec : 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。