IsDBCSLeadByteEx

関数

指定コードページでバイトがDBCS先頭バイトか判定する。

DLLKERNEL32.dll呼出規約winapiSetLastErrorあり対応OSWindows 2000 以降

シグネチャ

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

BOOL IsDBCSLeadByteEx(
    DWORD CodePage,
    BYTE TestChar
);

パラメーター

名前	型	方向
CodePage	DWORD	in
TestChar	BYTE	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL IsDBCSLeadByteEx(
    DWORD CodePage,
    BYTE TestChar
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool IsDBCSLeadByteEx(
    uint CodePage,   // DWORD
    byte TestChar   // BYTE
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function IsDBCSLeadByteEx(
    CodePage As UInteger,   ' DWORD
    TestChar As Byte   ' BYTE
) As Boolean
End Function

' CodePage : DWORD
' TestChar : BYTE
Declare PtrSafe Function IsDBCSLeadByteEx Lib "kernel32" ( _
    ByVal CodePage As Long, _
    ByVal TestChar As Byte) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

IsDBCSLeadByteEx = ctypes.windll.kernel32.IsDBCSLeadByteEx
IsDBCSLeadByteEx.restype = wintypes.BOOL
IsDBCSLeadByteEx.argtypes = [
    wintypes.DWORD,  # CodePage : DWORD
    ctypes.c_ubyte,  # TestChar : BYTE
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
IsDBCSLeadByteEx = Fiddle::Function.new(
  lib['IsDBCSLeadByteEx'],
  [
    -Fiddle::TYPE_INT,  # CodePage : DWORD
    -Fiddle::TYPE_CHAR,  # TestChar : BYTE
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn IsDBCSLeadByteEx(
        CodePage: u32,  // DWORD
        TestChar: u8  // BYTE
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern bool IsDBCSLeadByteEx(uint CodePage, byte TestChar);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_IsDBCSLeadByteEx' -Namespace Win32 -PassThru
# $api::IsDBCSLeadByteEx(CodePage, TestChar)

#uselib "KERNEL32.dll"
#func global IsDBCSLeadByteEx "IsDBCSLeadByteEx" sptr, sptr
; IsDBCSLeadByteEx CodePage, TestChar   ; 戻り値は stat
; CodePage : DWORD -> "sptr"
; TestChar : BYTE -> "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 "KERNEL32.dll"
#cfunc global IsDBCSLeadByteEx "IsDBCSLeadByteEx" int, int
; res = IsDBCSLeadByteEx(CodePage, TestChar)
; CodePage : DWORD -> "int"
; TestChar : BYTE -> "int"

; BOOL IsDBCSLeadByteEx(DWORD CodePage, BYTE TestChar)
#uselib "KERNEL32.dll"
#cfunc global IsDBCSLeadByteEx "IsDBCSLeadByteEx" int, int
; res = IsDBCSLeadByteEx(CodePage, TestChar)
; CodePage : DWORD -> "int"
; TestChar : BYTE -> "int"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procIsDBCSLeadByteEx = kernel32.NewProc("IsDBCSLeadByteEx")
)

// CodePage (DWORD), TestChar (BYTE)
r1, _, err := procIsDBCSLeadByteEx.Call(
	uintptr(CodePage),
	uintptr(TestChar),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function IsDBCSLeadByteEx(
  CodePage: DWORD;   // DWORD
  TestChar: Byte   // BYTE
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'IsDBCSLeadByteEx';

result := DllCall("KERNEL32\IsDBCSLeadByteEx"
    , "UInt", CodePage   ; DWORD
    , "UChar", TestChar   ; BYTE
    , "Int")   ; return: BOOL

●IsDBCSLeadByteEx(CodePage, TestChar) = DLL("KERNEL32.dll", "bool IsDBCSLeadByteEx(dword, byte)")
# 呼び出し: IsDBCSLeadByteEx(CodePage, TestChar)
# CodePage : DWORD -> "dword"
# TestChar : BYTE -> "byte"
# 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)。