uloc_forLanguageTag

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

INT uloc_forLanguageTag(
    LPCSTR langtag,
    LPSTR localeID,
    INT localeIDCapacity,
    INT* parsedLength,
    UErrorCode* err
);

<DllImport("icuuc.dll", ExactSpelling:=True, CallingConvention:=CallingConvention.Cdecl)>
Public Shared Function uloc_forLanguageTag(
    <MarshalAs(UnmanagedType.LPStr)> langtag As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> localeID As String,   ' LPSTR
    localeIDCapacity As Integer,   ' INT
    ByRef parsedLength As Integer,   ' INT* in/out
    ByRef err As Integer   ' UErrorCode* in/out
) As Integer
End Function

' langtag : LPCSTR
' localeID : LPSTR
' localeIDCapacity : INT
' parsedLength : INT* in/out
' err : UErrorCode* in/out
Declare PtrSafe Function uloc_forLanguageTag Lib "icuuc" ( _
    ByVal langtag As String, _
    ByVal localeID As String, _
    ByVal localeIDCapacity As Long, _
    ByRef parsedLength As Long, _
    ByRef err 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

uloc_forLanguageTag = ctypes.cdll.icuuc.uloc_forLanguageTag
uloc_forLanguageTag.restype = ctypes.c_int
uloc_forLanguageTag.argtypes = [
    wintypes.LPCSTR,  # langtag : LPCSTR
    wintypes.LPCSTR,  # localeID : LPSTR
    ctypes.c_int,  # localeIDCapacity : INT
    ctypes.POINTER(ctypes.c_int),  # parsedLength : INT* in/out
    ctypes.c_void_p,  # err : UErrorCode* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('icuuc.dll')
uloc_forLanguageTag = Fiddle::Function.new(
  lib['uloc_forLanguageTag'],
  [
    Fiddle::TYPE_VOIDP,  # langtag : LPCSTR
    Fiddle::TYPE_VOIDP,  # localeID : LPSTR
    Fiddle::TYPE_INT,  # localeIDCapacity : INT
    Fiddle::TYPE_VOIDP,  # parsedLength : INT* in/out
    Fiddle::TYPE_VOIDP,  # err : UErrorCode* in/out
  ],
  Fiddle::TYPE_INT, Fiddle::Function::CDECL)

#[link(name = "icuuc")]
extern "C" {
    fn uloc_forLanguageTag(
        langtag: *const u8,  // LPCSTR
        localeID: *mut u8,  // LPSTR
        localeIDCapacity: i32,  // INT
        parsedLength: *mut i32,  // INT* in/out
        err: *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 uloc_forLanguageTag([MarshalAs(UnmanagedType.LPStr)] string langtag, [MarshalAs(UnmanagedType.LPStr)] string localeID, int localeIDCapacity, ref int parsedLength, ref int err);
"@
$api = Add-Type -MemberDefinition $sig -Name 'icuuc_uloc_forLanguageTag' -Namespace Win32 -PassThru
# $api::uloc_forLanguageTag(langtag, localeID, localeIDCapacity, parsedLength, err)

#uselib "icuuc.dll"
#func global uloc_forLanguageTag "uloc_forLanguageTag" sptr, sptr, sptr, sptr, sptr
; uloc_forLanguageTag langtag, localeID, localeIDCapacity, varptr(parsedLength), err   ; 戻り値は stat
; langtag : LPCSTR -> "sptr"
; localeID : LPSTR -> "sptr"
; localeIDCapacity : INT -> "sptr"
; parsedLength : INT* in/out -> "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。

#uselib "icuuc.dll"
#cfunc global uloc_forLanguageTag "uloc_forLanguageTag" str, str, int, var, int
; res = uloc_forLanguageTag(langtag, localeID, localeIDCapacity, parsedLength, err)
; langtag : LPCSTR -> "str"
; localeID : LPSTR -> "str"
; localeIDCapacity : INT -> "int"
; parsedLength : INT* in/out -> "var"
; err : UErrorCode* in/out -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; INT uloc_forLanguageTag(LPCSTR langtag, LPSTR localeID, INT localeIDCapacity, INT* parsedLength, UErrorCode* err)
#uselib "icuuc.dll"
#cfunc global uloc_forLanguageTag "uloc_forLanguageTag" str, str, int, var, int
; res = uloc_forLanguageTag(langtag, localeID, localeIDCapacity, parsedLength, err)
; langtag : LPCSTR -> "str"
; localeID : LPSTR -> "str"
; localeIDCapacity : INT -> "int"
; parsedLength : INT* in/out -> "var"
; err : UErrorCode* in/out -> "int"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	icuuc = windows.NewLazySystemDLL("icuuc.dll")
	proculoc_forLanguageTag = icuuc.NewProc("uloc_forLanguageTag")
)

// langtag (LPCSTR), localeID (LPSTR), localeIDCapacity (INT), parsedLength (INT* in/out), err (UErrorCode* in/out)
r1, _, err := proculoc_forLanguageTag.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(langtag))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(localeID))),
	uintptr(localeIDCapacity),
	uintptr(parsedLength),
	uintptr(err),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function uloc_forLanguageTag(
  langtag: PAnsiChar;   // LPCSTR
  localeID: PAnsiChar;   // LPSTR
  localeIDCapacity: Integer;   // INT
  parsedLength: Pointer;   // INT* in/out
  err: Pointer   // UErrorCode* in/out
): Integer; cdecl;
  external 'icuuc.dll' name 'uloc_forLanguageTag';

result := DllCall("icuuc\uloc_forLanguageTag"
    , "AStr", langtag   ; LPCSTR
    , "AStr", localeID   ; LPSTR
    , "Int", localeIDCapacity   ; INT
    , "Ptr", parsedLength   ; INT* in/out
    , "Ptr", err   ; UErrorCode* in/out
    , "Cdecl Int")   ; return: INT

●uloc_forLanguageTag(langtag, localeID, localeIDCapacity, parsedLength, err) = DLL("icuuc.dll", "int uloc_forLanguageTag(char*, char*, int, void*, void*)")
# 呼び出し: uloc_forLanguageTag(langtag, localeID, localeIDCapacity, parsedLength, err)
# langtag : LPCSTR -> "char*"
# localeID : LPSTR -> "char*"
# localeIDCapacity : INT -> "int"
# parsedLength : INT* in/out -> "void*"
# 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。