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ReadLogRecord

関数

CLFSログから指定LSNのレコードを読み取る。

DLLclfsw32.dll呼出規約winapiSetLastErrorあり対応OSWindows Vista 以降

シグネチャ

// clfsw32.dll
#include <windows.h>

BOOL ReadLogRecord(
    void* pvMarshal,
    CLS_LSN* plsnFirst,
    CLFS_CONTEXT_MODE eContextMode,
    void** ppvReadBuffer,
    DWORD* pcbReadBuffer,
    BYTE* peRecordType,
    CLS_LSN* plsnUndoNext,
    CLS_LSN* plsnPrevious,
    void** ppvReadContext,
    OVERLAPPED* pOverlapped
);

パラメーター

名前	型	方向
pvMarshal	void*	inout
plsnFirst	CLS_LSN*	inout
eContextMode	CLFS_CONTEXT_MODE	in
ppvReadBuffer	void**	inout
pcbReadBuffer	DWORD*	inout
peRecordType	BYTE*	inout
plsnUndoNext	CLS_LSN*	inout
plsnPrevious	CLS_LSN*	inout
ppvReadContext	void**	inout
pOverlapped	OVERLAPPED*	inout

戻り値の型: BOOL

各言語での呼び出し定義

// clfsw32.dll
#include <windows.h>

BOOL ReadLogRecord(
    void* pvMarshal,
    CLS_LSN* plsnFirst,
    CLFS_CONTEXT_MODE eContextMode,
    void** ppvReadBuffer,
    DWORD* pcbReadBuffer,
    BYTE* peRecordType,
    CLS_LSN* plsnUndoNext,
    CLS_LSN* plsnPrevious,
    void** ppvReadContext,
    OVERLAPPED* pOverlapped
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("clfsw32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool ReadLogRecord(
    IntPtr pvMarshal,   // void* in/out
    IntPtr plsnFirst,   // CLS_LSN* in/out
    int eContextMode,   // CLFS_CONTEXT_MODE
    IntPtr ppvReadBuffer,   // void** in/out
    ref uint pcbReadBuffer,   // DWORD* in/out
    IntPtr peRecordType,   // BYTE* in/out
    IntPtr plsnUndoNext,   // CLS_LSN* in/out
    IntPtr plsnPrevious,   // CLS_LSN* in/out
    IntPtr ppvReadContext,   // void** in/out
    IntPtr pOverlapped   // OVERLAPPED* in/out
);

<DllImport("clfsw32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ReadLogRecord(
    pvMarshal As IntPtr,   ' void* in/out
    plsnFirst As IntPtr,   ' CLS_LSN* in/out
    eContextMode As Integer,   ' CLFS_CONTEXT_MODE
    ppvReadBuffer As IntPtr,   ' void** in/out
    ByRef pcbReadBuffer As UInteger,   ' DWORD* in/out
    peRecordType As IntPtr,   ' BYTE* in/out
    plsnUndoNext As IntPtr,   ' CLS_LSN* in/out
    plsnPrevious As IntPtr,   ' CLS_LSN* in/out
    ppvReadContext As IntPtr,   ' void** in/out
    pOverlapped As IntPtr   ' OVERLAPPED* in/out
) As Boolean
End Function

' pvMarshal : void* in/out
' plsnFirst : CLS_LSN* in/out
' eContextMode : CLFS_CONTEXT_MODE
' ppvReadBuffer : void** in/out
' pcbReadBuffer : DWORD* in/out
' peRecordType : BYTE* in/out
' plsnUndoNext : CLS_LSN* in/out
' plsnPrevious : CLS_LSN* in/out
' ppvReadContext : void** in/out
' pOverlapped : OVERLAPPED* in/out
Declare PtrSafe Function ReadLogRecord Lib "clfsw32" ( _
    ByVal pvMarshal As LongPtr, _
    ByVal plsnFirst As LongPtr, _
    ByVal eContextMode As Long, _
    ByVal ppvReadBuffer As LongPtr, _
    ByRef pcbReadBuffer As Long, _
    ByVal peRecordType As LongPtr, _
    ByVal plsnUndoNext As LongPtr, _
    ByVal plsnPrevious As LongPtr, _
    ByVal ppvReadContext As LongPtr, _
    ByVal pOverlapped 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

ReadLogRecord = ctypes.windll.clfsw32.ReadLogRecord
ReadLogRecord.restype = wintypes.BOOL
ReadLogRecord.argtypes = [
    ctypes.POINTER(None),  # pvMarshal : void* in/out
    ctypes.c_void_p,  # plsnFirst : CLS_LSN* in/out
    ctypes.c_int,  # eContextMode : CLFS_CONTEXT_MODE
    ctypes.c_void_p,  # ppvReadBuffer : void** in/out
    ctypes.POINTER(wintypes.DWORD),  # pcbReadBuffer : DWORD* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # peRecordType : BYTE* in/out
    ctypes.c_void_p,  # plsnUndoNext : CLS_LSN* in/out
    ctypes.c_void_p,  # plsnPrevious : CLS_LSN* in/out
    ctypes.c_void_p,  # ppvReadContext : void** in/out
    ctypes.c_void_p,  # pOverlapped : OVERLAPPED* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('clfsw32.dll')
ReadLogRecord = Fiddle::Function.new(
  lib['ReadLogRecord'],
  [
    Fiddle::TYPE_VOIDP,  # pvMarshal : void* in/out
    Fiddle::TYPE_VOIDP,  # plsnFirst : CLS_LSN* in/out
    Fiddle::TYPE_INT,  # eContextMode : CLFS_CONTEXT_MODE
    Fiddle::TYPE_VOIDP,  # ppvReadBuffer : void** in/out
    Fiddle::TYPE_VOIDP,  # pcbReadBuffer : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # peRecordType : BYTE* in/out
    Fiddle::TYPE_VOIDP,  # plsnUndoNext : CLS_LSN* in/out
    Fiddle::TYPE_VOIDP,  # plsnPrevious : CLS_LSN* in/out
    Fiddle::TYPE_VOIDP,  # ppvReadContext : void** in/out
    Fiddle::TYPE_VOIDP,  # pOverlapped : OVERLAPPED* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "clfsw32")]
extern "system" {
    fn ReadLogRecord(
        pvMarshal: *mut (),  // void* in/out
        plsnFirst: *mut CLS_LSN,  // CLS_LSN* in/out
        eContextMode: i32,  // CLFS_CONTEXT_MODE
        ppvReadBuffer: *mut *mut (),  // void** in/out
        pcbReadBuffer: *mut u32,  // DWORD* in/out
        peRecordType: *mut u8,  // BYTE* in/out
        plsnUndoNext: *mut CLS_LSN,  // CLS_LSN* in/out
        plsnPrevious: *mut CLS_LSN,  // CLS_LSN* in/out
        ppvReadContext: *mut *mut (),  // void** in/out
        pOverlapped: *mut OVERLAPPED  // OVERLAPPED* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("clfsw32.dll", SetLastError = true)]
public static extern bool ReadLogRecord(IntPtr pvMarshal, IntPtr plsnFirst, int eContextMode, IntPtr ppvReadBuffer, ref uint pcbReadBuffer, IntPtr peRecordType, IntPtr plsnUndoNext, IntPtr plsnPrevious, IntPtr ppvReadContext, IntPtr pOverlapped);
"@
$api = Add-Type -MemberDefinition $sig -Name 'clfsw32_ReadLogRecord' -Namespace Win32 -PassThru
# $api::ReadLogRecord(pvMarshal, plsnFirst, eContextMode, ppvReadBuffer, pcbReadBuffer, peRecordType, plsnUndoNext, plsnPrevious, ppvReadContext, pOverlapped)

#uselib "clfsw32.dll"
#func global ReadLogRecord "ReadLogRecord" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; ReadLogRecord pvMarshal, varptr(plsnFirst), eContextMode, ppvReadBuffer, varptr(pcbReadBuffer), varptr(peRecordType), varptr(plsnUndoNext), varptr(plsnPrevious), ppvReadContext, varptr(pOverlapped)   ; 戻り値は stat
; pvMarshal : void* in/out -> "sptr"
; plsnFirst : CLS_LSN* in/out -> "sptr"
; eContextMode : CLFS_CONTEXT_MODE -> "sptr"
; ppvReadBuffer : void** in/out -> "sptr"
; pcbReadBuffer : DWORD* in/out -> "sptr"
; peRecordType : BYTE* in/out -> "sptr"
; plsnUndoNext : CLS_LSN* in/out -> "sptr"
; plsnPrevious : CLS_LSN* in/out -> "sptr"
; ppvReadContext : void** in/out -> "sptr"
; pOverlapped : OVERLAPPED* 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。

出力引数:

#uselib "clfsw32.dll"
#cfunc global ReadLogRecord "ReadLogRecord" sptr, var, int, sptr, var, var, var, var, sptr, var
; res = ReadLogRecord(pvMarshal, plsnFirst, eContextMode, ppvReadBuffer, pcbReadBuffer, peRecordType, plsnUndoNext, plsnPrevious, ppvReadContext, pOverlapped)
; pvMarshal : void* in/out -> "sptr"
; plsnFirst : CLS_LSN* in/out -> "var"
; eContextMode : CLFS_CONTEXT_MODE -> "int"
; ppvReadBuffer : void** in/out -> "sptr"
; pcbReadBuffer : DWORD* in/out -> "var"
; peRecordType : BYTE* in/out -> "var"
; plsnUndoNext : CLS_LSN* in/out -> "var"
; plsnPrevious : CLS_LSN* in/out -> "var"
; ppvReadContext : void** in/out -> "sptr"
; pOverlapped : OVERLAPPED* in/out -> "var"
; ※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 "clfsw32.dll"
#cfunc global ReadLogRecord "ReadLogRecord" sptr, sptr, int, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; res = ReadLogRecord(pvMarshal, varptr(plsnFirst), eContextMode, ppvReadBuffer, varptr(pcbReadBuffer), varptr(peRecordType), varptr(plsnUndoNext), varptr(plsnPrevious), ppvReadContext, varptr(pOverlapped))
; pvMarshal : void* in/out -> "sptr"
; plsnFirst : CLS_LSN* in/out -> "sptr"
; eContextMode : CLFS_CONTEXT_MODE -> "int"
; ppvReadBuffer : void** in/out -> "sptr"
; pcbReadBuffer : DWORD* in/out -> "sptr"
; peRecordType : BYTE* in/out -> "sptr"
; plsnUndoNext : CLS_LSN* in/out -> "sptr"
; plsnPrevious : CLS_LSN* in/out -> "sptr"
; ppvReadContext : void** in/out -> "sptr"
; pOverlapped : OVERLAPPED* in/out -> "sptr"
; ※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:

; BOOL ReadLogRecord(void* pvMarshal, CLS_LSN* plsnFirst, CLFS_CONTEXT_MODE eContextMode, void** ppvReadBuffer, DWORD* pcbReadBuffer, BYTE* peRecordType, CLS_LSN* plsnUndoNext, CLS_LSN* plsnPrevious, void** ppvReadContext, OVERLAPPED* pOverlapped)
#uselib "clfsw32.dll"
#cfunc global ReadLogRecord "ReadLogRecord" intptr, var, int, intptr, var, var, var, var, intptr, var
; res = ReadLogRecord(pvMarshal, plsnFirst, eContextMode, ppvReadBuffer, pcbReadBuffer, peRecordType, plsnUndoNext, plsnPrevious, ppvReadContext, pOverlapped)
; pvMarshal : void* in/out -> "intptr"
; plsnFirst : CLS_LSN* in/out -> "var"
; eContextMode : CLFS_CONTEXT_MODE -> "int"
; ppvReadBuffer : void** in/out -> "intptr"
; pcbReadBuffer : DWORD* in/out -> "var"
; peRecordType : BYTE* in/out -> "var"
; plsnUndoNext : CLS_LSN* in/out -> "var"
; plsnPrevious : CLS_LSN* in/out -> "var"
; ppvReadContext : void** in/out -> "intptr"
; pOverlapped : OVERLAPPED* in/out -> "var"
; ※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。; BOOL ReadLogRecord(void* pvMarshal, CLS_LSN* plsnFirst, CLFS_CONTEXT_MODE eContextMode, void** ppvReadBuffer, DWORD* pcbReadBuffer, BYTE* peRecordType, CLS_LSN* plsnUndoNext, CLS_LSN* plsnPrevious, void** ppvReadContext, OVERLAPPED* pOverlapped)
#uselib "clfsw32.dll"
#cfunc global ReadLogRecord "ReadLogRecord" intptr, intptr, int, intptr, intptr, intptr, intptr, intptr, intptr, intptr
; res = ReadLogRecord(pvMarshal, varptr(plsnFirst), eContextMode, ppvReadBuffer, varptr(pcbReadBuffer), varptr(peRecordType), varptr(plsnUndoNext), varptr(plsnPrevious), ppvReadContext, varptr(pOverlapped))
; pvMarshal : void* in/out -> "intptr"
; plsnFirst : CLS_LSN* in/out -> "intptr"
; eContextMode : CLFS_CONTEXT_MODE -> "int"
; ppvReadBuffer : void** in/out -> "intptr"
; pcbReadBuffer : DWORD* in/out -> "intptr"
; peRecordType : BYTE* in/out -> "intptr"
; plsnUndoNext : CLS_LSN* in/out -> "intptr"
; plsnPrevious : CLS_LSN* in/out -> "intptr"
; ppvReadContext : void** in/out -> "intptr"
; pOverlapped : OVERLAPPED* in/out -> "intptr"
; ※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 (
	clfsw32 = windows.NewLazySystemDLL("clfsw32.dll")
	procReadLogRecord = clfsw32.NewProc("ReadLogRecord")
)

// pvMarshal (void* in/out), plsnFirst (CLS_LSN* in/out), eContextMode (CLFS_CONTEXT_MODE), ppvReadBuffer (void** in/out), pcbReadBuffer (DWORD* in/out), peRecordType (BYTE* in/out), plsnUndoNext (CLS_LSN* in/out), plsnPrevious (CLS_LSN* in/out), ppvReadContext (void** in/out), pOverlapped (OVERLAPPED* in/out)
r1, _, err := procReadLogRecord.Call(
	uintptr(pvMarshal),
	uintptr(plsnFirst),
	uintptr(eContextMode),
	uintptr(ppvReadBuffer),
	uintptr(pcbReadBuffer),
	uintptr(peRecordType),
	uintptr(plsnUndoNext),
	uintptr(plsnPrevious),
	uintptr(ppvReadContext),
	uintptr(pOverlapped),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ReadLogRecord(
  pvMarshal: Pointer;   // void* in/out
  plsnFirst: Pointer;   // CLS_LSN* in/out
  eContextMode: Integer;   // CLFS_CONTEXT_MODE
  ppvReadBuffer: Pointer;   // void** in/out
  pcbReadBuffer: Pointer;   // DWORD* in/out
  peRecordType: Pointer;   // BYTE* in/out
  plsnUndoNext: Pointer;   // CLS_LSN* in/out
  plsnPrevious: Pointer;   // CLS_LSN* in/out
  ppvReadContext: Pointer;   // void** in/out
  pOverlapped: Pointer   // OVERLAPPED* in/out
): BOOL; stdcall;
  external 'clfsw32.dll' name 'ReadLogRecord';

result := DllCall("clfsw32\ReadLogRecord"
    , "Ptr", pvMarshal   ; void* in/out
    , "Ptr", plsnFirst   ; CLS_LSN* in/out
    , "Int", eContextMode   ; CLFS_CONTEXT_MODE
    , "Ptr", ppvReadBuffer   ; void** in/out
    , "Ptr", pcbReadBuffer   ; DWORD* in/out
    , "Ptr", peRecordType   ; BYTE* in/out
    , "Ptr", plsnUndoNext   ; CLS_LSN* in/out
    , "Ptr", plsnPrevious   ; CLS_LSN* in/out
    , "Ptr", ppvReadContext   ; void** in/out
    , "Ptr", pOverlapped   ; OVERLAPPED* in/out
    , "Int")   ; return: BOOL

●ReadLogRecord(pvMarshal, plsnFirst, eContextMode, ppvReadBuffer, pcbReadBuffer, peRecordType, plsnUndoNext, plsnPrevious, ppvReadContext, pOverlapped) = DLL("clfsw32.dll", "bool ReadLogRecord(void*, void*, int, void*, void*, void*, void*, void*, void*, void*)")
# 呼び出し: ReadLogRecord(pvMarshal, plsnFirst, eContextMode, ppvReadBuffer, pcbReadBuffer, peRecordType, plsnUndoNext, plsnPrevious, ppvReadContext, pOverlapped)
# pvMarshal : void* in/out -> "void*"
# plsnFirst : CLS_LSN* in/out -> "void*"
# eContextMode : CLFS_CONTEXT_MODE -> "int"
# ppvReadBuffer : void** in/out -> "void*"
# pcbReadBuffer : DWORD* in/out -> "void*"
# peRecordType : BYTE* in/out -> "void*"
# plsnUndoNext : CLS_LSN* in/out -> "void*"
# plsnPrevious : CLS_LSN* in/out -> "void*"
# ppvReadContext : void** in/out -> "void*"
# pOverlapped : OVERLAPPED* 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)。