IsBadStringPtrA

関数

ANSI文字列ポインタが読み取り可能かを検証する(非推奨)。

DLLKERNEL32.dll文字セットANSI (-A)呼出規約winapi対応OSWindows XP 以降

シグネチャ

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

BOOL IsBadStringPtrA(
    LPCSTR lpsz,   // optional
    UINT_PTR ucchMax
);

パラメーター

名前	型	方向
lpsz	LPCSTR	inoptional
ucchMax	UINT_PTR	in

戻り値の型: BOOL

各言語での呼び出し定義

// KERNEL32.dll  (ANSI / -A)
#include <windows.h>

BOOL IsBadStringPtrA(
    LPCSTR lpsz,   // optional
    UINT_PTR ucchMax
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern bool IsBadStringPtrA(
    [MarshalAs(UnmanagedType.LPStr)] string lpsz,   // LPCSTR optional
    UIntPtr ucchMax   // UINT_PTR
);

<DllImport("KERNEL32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function IsBadStringPtrA(
    <MarshalAs(UnmanagedType.LPStr)> lpsz As String,   ' LPCSTR optional
    ucchMax As UIntPtr   ' UINT_PTR
) As Boolean
End Function

' lpsz : LPCSTR optional
' ucchMax : UINT_PTR
Declare PtrSafe Function IsBadStringPtrA Lib "kernel32" ( _
    ByVal lpsz As String, _
    ByVal ucchMax 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

IsBadStringPtrA = ctypes.windll.kernel32.IsBadStringPtrA
IsBadStringPtrA.restype = wintypes.BOOL
IsBadStringPtrA.argtypes = [
    wintypes.LPCSTR,  # lpsz : LPCSTR optional
    ctypes.c_size_t,  # ucchMax : UINT_PTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
IsBadStringPtrA = Fiddle::Function.new(
  lib['IsBadStringPtrA'],
  [
    Fiddle::TYPE_VOIDP,  # lpsz : LPCSTR optional
    Fiddle::TYPE_UINTPTR_T,  # ucchMax : UINT_PTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn IsBadStringPtrA(
        lpsz: *const u8,  // LPCSTR optional
        ucchMax: usize  // UINT_PTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("KERNEL32.dll", CharSet = CharSet.Ansi)]
public static extern bool IsBadStringPtrA([MarshalAs(UnmanagedType.LPStr)] string lpsz, UIntPtr ucchMax);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_IsBadStringPtrA' -Namespace Win32 -PassThru
# $api::IsBadStringPtrA(lpsz, ucchMax)

#uselib "KERNEL32.dll"
#func global IsBadStringPtrA "IsBadStringPtrA" sptr, sptr
; IsBadStringPtrA lpsz, ucchMax   ; 戻り値は stat
; lpsz : LPCSTR optional -> "sptr"
; ucchMax : UINT_PTR -> "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 IsBadStringPtrA "IsBadStringPtrA" str, sptr
; res = IsBadStringPtrA(lpsz, ucchMax)
; lpsz : LPCSTR optional -> "str"
; ucchMax : UINT_PTR -> "sptr"

; BOOL IsBadStringPtrA(LPCSTR lpsz, UINT_PTR ucchMax)
#uselib "KERNEL32.dll"
#cfunc global IsBadStringPtrA "IsBadStringPtrA" str, intptr
; res = IsBadStringPtrA(lpsz, ucchMax)
; lpsz : LPCSTR optional -> "str"
; ucchMax : UINT_PTR -> "intptr"

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

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procIsBadStringPtrA = kernel32.NewProc("IsBadStringPtrA")
)

// lpsz (LPCSTR optional), ucchMax (UINT_PTR)
r1, _, err := procIsBadStringPtrA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpsz))),
	uintptr(ucchMax),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function IsBadStringPtrA(
  lpsz: PAnsiChar;   // LPCSTR optional
  ucchMax: NativeUInt   // UINT_PTR
): BOOL; stdcall;
  external 'KERNEL32.dll' name 'IsBadStringPtrA';

result := DllCall("KERNEL32\IsBadStringPtrA"
    , "AStr", lpsz   ; LPCSTR optional
    , "UPtr", ucchMax   ; UINT_PTR
    , "Int")   ; return: BOOL

●IsBadStringPtrA(lpsz, ucchMax) = DLL("KERNEL32.dll", "bool IsBadStringPtrA(char*, int)")
# 呼び出し: IsBadStringPtrA(lpsz, ucchMax)
# lpsz : LPCSTR optional -> "char*"
# ucchMax : UINT_PTR -> "int"
# 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)。