GetDateFormatEx

関数

ロケール名と暦を指定して日付を文字列へ整形する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// KERNEL32.dll
#include <windows.h>

INT GetDateFormatEx(
    LPCWSTR lpLocaleName,   // optional
    ENUM_DATE_FORMATS_FLAGS dwFlags,
    const SYSTEMTIME* lpDate,   // optional
    LPCWSTR lpFormat,   // optional
    LPWSTR lpDateStr,   // optional
    INT cchDate,
    LPCWSTR lpCalendar   // optional
);

パラメーター

名前	型	方向
lpLocaleName	LPCWSTR	inoptional
dwFlags	ENUM_DATE_FORMATS_FLAGS	in
lpDate	SYSTEMTIME*	inoptional
lpFormat	LPCWSTR	inoptional
lpDateStr	LPWSTR	outoptional
cchDate	INT	in
lpCalendar	LPCWSTR	inoptional

戻り値の型: INT

各言語での呼び出し定義

// KERNEL32.dll
#include <windows.h>

INT GetDateFormatEx(
    LPCWSTR lpLocaleName,   // optional
    ENUM_DATE_FORMATS_FLAGS dwFlags,
    const SYSTEMTIME* lpDate,   // optional
    LPCWSTR lpFormat,   // optional
    LPWSTR lpDateStr,   // optional
    INT cchDate,
    LPCWSTR lpCalendar   // optional
);

[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern int GetDateFormatEx(
    [MarshalAs(UnmanagedType.LPWStr)] string lpLocaleName,   // LPCWSTR optional
    uint dwFlags,   // ENUM_DATE_FORMATS_FLAGS
    IntPtr lpDate,   // SYSTEMTIME* optional
    [MarshalAs(UnmanagedType.LPWStr)] string lpFormat,   // LPCWSTR optional
    [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpDateStr,   // LPWSTR optional, out
    int cchDate,   // INT
    [MarshalAs(UnmanagedType.LPWStr)] string lpCalendar   // LPCWSTR optional
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function GetDateFormatEx(
    <MarshalAs(UnmanagedType.LPWStr)> lpLocaleName As String,   ' LPCWSTR optional
    dwFlags As UInteger,   ' ENUM_DATE_FORMATS_FLAGS
    lpDate As IntPtr,   ' SYSTEMTIME* optional
    <MarshalAs(UnmanagedType.LPWStr)> lpFormat As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpDateStr As System.Text.StringBuilder,   ' LPWSTR optional, out
    cchDate As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPWStr)> lpCalendar As String   ' LPCWSTR optional
) As Integer
End Function

' lpLocaleName : LPCWSTR optional
' dwFlags : ENUM_DATE_FORMATS_FLAGS
' lpDate : SYSTEMTIME* optional
' lpFormat : LPCWSTR optional
' lpDateStr : LPWSTR optional, out
' cchDate : INT
' lpCalendar : LPCWSTR optional
Declare PtrSafe Function GetDateFormatEx Lib "kernel32" ( _
    ByVal lpLocaleName As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal lpDate As LongPtr, _
    ByVal lpFormat As LongPtr, _
    ByVal lpDateStr As LongPtr, _
    ByVal cchDate As Long, _
    ByVal lpCalendar As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetDateFormatEx = ctypes.windll.kernel32.GetDateFormatEx
GetDateFormatEx.restype = ctypes.c_int
GetDateFormatEx.argtypes = [
    wintypes.LPCWSTR,  # lpLocaleName : LPCWSTR optional
    wintypes.DWORD,  # dwFlags : ENUM_DATE_FORMATS_FLAGS
    ctypes.c_void_p,  # lpDate : SYSTEMTIME* optional
    wintypes.LPCWSTR,  # lpFormat : LPCWSTR optional
    wintypes.LPWSTR,  # lpDateStr : LPWSTR optional, out
    ctypes.c_int,  # cchDate : INT
    wintypes.LPCWSTR,  # lpCalendar : LPCWSTR optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
GetDateFormatEx = Fiddle::Function.new(
  lib['GetDateFormatEx'],
  [
    Fiddle::TYPE_VOIDP,  # lpLocaleName : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwFlags : ENUM_DATE_FORMATS_FLAGS
    Fiddle::TYPE_VOIDP,  # lpDate : SYSTEMTIME* optional
    Fiddle::TYPE_VOIDP,  # lpFormat : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # lpDateStr : LPWSTR optional, out
    Fiddle::TYPE_INT,  # cchDate : INT
    Fiddle::TYPE_VOIDP,  # lpCalendar : LPCWSTR optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn GetDateFormatEx(
        lpLocaleName: *const u16,  // LPCWSTR optional
        dwFlags: u32,  // ENUM_DATE_FORMATS_FLAGS
        lpDate: *const SYSTEMTIME,  // SYSTEMTIME* optional
        lpFormat: *const u16,  // LPCWSTR optional
        lpDateStr: *mut u16,  // LPWSTR optional, out
        cchDate: i32,  // INT
        lpCalendar: *const u16  // LPCWSTR optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern int GetDateFormatEx([MarshalAs(UnmanagedType.LPWStr)] string lpLocaleName, uint dwFlags, IntPtr lpDate, [MarshalAs(UnmanagedType.LPWStr)] string lpFormat, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder lpDateStr, int cchDate, [MarshalAs(UnmanagedType.LPWStr)] string lpCalendar);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_GetDateFormatEx' -Namespace Win32 -PassThru
# $api::GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)

#uselib "KERNEL32.dll"
#func global GetDateFormatEx "GetDateFormatEx" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; GetDateFormatEx lpLocaleName, dwFlags, varptr(lpDate), lpFormat, varptr(lpDateStr), cchDate, lpCalendar   ; 戻り値は stat
; lpLocaleName : LPCWSTR optional -> "sptr"
; dwFlags : ENUM_DATE_FORMATS_FLAGS -> "sptr"
; lpDate : SYSTEMTIME* optional -> "sptr"
; lpFormat : LPCWSTR optional -> "sptr"
; lpDateStr : LPWSTR optional, out -> "sptr"
; cchDate : INT -> "sptr"
; lpCalendar : LPCWSTR optional -> "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。

出力引数:

#uselib "KERNEL32.dll"
#cfunc global GetDateFormatEx "GetDateFormatEx" wstr, int, var, wstr, var, int, wstr
; res = GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
; lpLocaleName : LPCWSTR optional -> "wstr"
; dwFlags : ENUM_DATE_FORMATS_FLAGS -> "int"
; lpDate : SYSTEMTIME* optional -> "var"
; lpFormat : LPCWSTR optional -> "wstr"
; lpDateStr : LPWSTR optional, out -> "var"
; cchDate : INT -> "int"
; lpCalendar : LPCWSTR optional -> "wstr"
; ※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。#uselib "KERNEL32.dll"
#cfunc global GetDateFormatEx "GetDateFormatEx" wstr, int, sptr, wstr, sptr, int, wstr
; res = GetDateFormatEx(lpLocaleName, dwFlags, varptr(lpDate), lpFormat, varptr(lpDateStr), cchDate, lpCalendar)
; lpLocaleName : LPCWSTR optional -> "wstr"
; dwFlags : ENUM_DATE_FORMATS_FLAGS -> "int"
; lpDate : SYSTEMTIME* optional -> "sptr"
; lpFormat : LPCWSTR optional -> "wstr"
; lpDateStr : LPWSTR optional, out -> "sptr"
; cchDate : INT -> "int"
; lpCalendar : LPCWSTR optional -> "wstr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; INT GetDateFormatEx(LPCWSTR lpLocaleName, ENUM_DATE_FORMATS_FLAGS dwFlags, SYSTEMTIME* lpDate, LPCWSTR lpFormat, LPWSTR lpDateStr, INT cchDate, LPCWSTR lpCalendar)
#uselib "KERNEL32.dll"
#cfunc global GetDateFormatEx "GetDateFormatEx" wstr, int, var, wstr, var, int, wstr
; res = GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
; lpLocaleName : LPCWSTR optional -> "wstr"
; dwFlags : ENUM_DATE_FORMATS_FLAGS -> "int"
; lpDate : SYSTEMTIME* optional -> "var"
; lpFormat : LPCWSTR optional -> "wstr"
; lpDateStr : LPWSTR optional, out -> "var"
; cchDate : INT -> "int"
; lpCalendar : LPCWSTR optional -> "wstr"
; ※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 GetDateFormatEx(LPCWSTR lpLocaleName, ENUM_DATE_FORMATS_FLAGS dwFlags, SYSTEMTIME* lpDate, LPCWSTR lpFormat, LPWSTR lpDateStr, INT cchDate, LPCWSTR lpCalendar)
#uselib "KERNEL32.dll"
#cfunc global GetDateFormatEx "GetDateFormatEx" wstr, int, intptr, wstr, intptr, int, wstr
; res = GetDateFormatEx(lpLocaleName, dwFlags, varptr(lpDate), lpFormat, varptr(lpDateStr), cchDate, lpCalendar)
; lpLocaleName : LPCWSTR optional -> "wstr"
; dwFlags : ENUM_DATE_FORMATS_FLAGS -> "int"
; lpDate : SYSTEMTIME* optional -> "intptr"
; lpFormat : LPCWSTR optional -> "wstr"
; lpDateStr : LPWSTR optional, out -> "intptr"
; cchDate : INT -> "int"
; lpCalendar : LPCWSTR optional -> "wstr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procGetDateFormatEx = kernel32.NewProc("GetDateFormatEx")
)

// lpLocaleName (LPCWSTR optional), dwFlags (ENUM_DATE_FORMATS_FLAGS), lpDate (SYSTEMTIME* optional), lpFormat (LPCWSTR optional), lpDateStr (LPWSTR optional, out), cchDate (INT), lpCalendar (LPCWSTR optional)
r1, _, err := procGetDateFormatEx.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpLocaleName))),
	uintptr(dwFlags),
	uintptr(lpDate),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFormat))),
	uintptr(lpDateStr),
	uintptr(cchDate),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpCalendar))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function GetDateFormatEx(
  lpLocaleName: PWideChar;   // LPCWSTR optional
  dwFlags: DWORD;   // ENUM_DATE_FORMATS_FLAGS
  lpDate: Pointer;   // SYSTEMTIME* optional
  lpFormat: PWideChar;   // LPCWSTR optional
  lpDateStr: PWideChar;   // LPWSTR optional, out
  cchDate: Integer;   // INT
  lpCalendar: PWideChar   // LPCWSTR optional
): Integer; stdcall;
  external 'KERNEL32.dll' name 'GetDateFormatEx';

result := DllCall("KERNEL32\GetDateFormatEx"
    , "WStr", lpLocaleName   ; LPCWSTR optional
    , "UInt", dwFlags   ; ENUM_DATE_FORMATS_FLAGS
    , "Ptr", lpDate   ; SYSTEMTIME* optional
    , "WStr", lpFormat   ; LPCWSTR optional
    , "Ptr", lpDateStr   ; LPWSTR optional, out
    , "Int", cchDate   ; INT
    , "WStr", lpCalendar   ; LPCWSTR optional
    , "Int")   ; return: INT

●GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar) = DLL("KERNEL32.dll", "int GetDateFormatEx(char*, dword, void*, char*, char*, int, char*)")
# 呼び出し: GetDateFormatEx(lpLocaleName, dwFlags, lpDate, lpFormat, lpDateStr, cchDate, lpCalendar)
# lpLocaleName : LPCWSTR optional -> "char*"
# dwFlags : ENUM_DATE_FORMATS_FLAGS -> "dword"
# lpDate : SYSTEMTIME* optional -> "void*"
# lpFormat : LPCWSTR optional -> "char*"
# lpDateStr : LPWSTR optional, out -> "char*"
# cchDate : INT -> "int"
# lpCalendar : LPCWSTR optional -> "char*"
# 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)。