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JET_COMMIT_ID
構造体サイズ=各フィールドのバイト数(x64/x86 で異なる場合は x64/x86 と併記)。x64/x86 列=フィールドのバイトオフセット(HSPで dupptr / lpoke / wpoke 等に使用)。
フィールド
| フィールド | 型 | サイズ | x64 | x86 | 説明 |
|---|---|---|---|---|---|
| signLog | JET_SIGNATURE | 44/36 | +0 | +0 | ログストリームを識別する署名JET_SIGNATURE。 |
| reserved | INT | 4 | +44 | +36 | 予約フィールド。アラインメント用で未使用。 |
| commitId | LONGLONG | 8 | +48 | +40 | コミット順序を示す単調増加のコミット識別子(64ビット)。 |
各言語での定義
#include <windows.h>
// JET_LOGTIME (x64 24 / x86 16 バイト)
typedef struct JET_LOGTIME {
CHAR bSeconds;
CHAR bMinutes;
CHAR bHours;
CHAR bDay;
CHAR bMonth;
CHAR bYear;
_Anonymous1_e__Union Anonymous1;
_Anonymous2_e__Union Anonymous2;
} JET_LOGTIME;
// JET_SIGNATURE (x64 44 / x86 36 バイト)
#pragma pack(push, 1)
typedef struct JET_SIGNATURE {
DWORD ulRandom;
JET_LOGTIME logtimeCreate;
CHAR szComputerName[16];
} JET_SIGNATURE;
#pragma pack(pop)
// JET_COMMIT_ID (x64 56 / x86 48 バイト)
#pragma pack(push, 4)
typedef struct JET_COMMIT_ID {
JET_SIGNATURE signLog;
INT reserved;
LONGLONG commitId;
} JET_COMMIT_ID;
#pragma pack(pop)using System;
using System.Runtime.InteropServices;
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct JET_LOGTIME
{
public sbyte bSeconds;
public sbyte bMinutes;
public sbyte bHours;
public sbyte bDay;
public sbyte bMonth;
public sbyte bYear;
public _Anonymous1_e__Union Anonymous1;
public _Anonymous2_e__Union Anonymous2;
}
[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct JET_SIGNATURE
{
public uint ulRandom;
public JET_LOGTIME logtimeCreate;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)] public sbyte[] szComputerName;
}
[StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Unicode)]
public struct JET_COMMIT_ID
{
public JET_SIGNATURE signLog;
public int reserved;
public long commitId;
}Imports System.Runtime.InteropServices
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure JET_LOGTIME
Public bSeconds As SByte
Public bMinutes As SByte
Public bHours As SByte
Public bDay As SByte
Public bMonth As SByte
Public bYear As SByte
Public Anonymous1 As _Anonymous1_e__Union
Public Anonymous2 As _Anonymous2_e__Union
End Structure
<StructLayout(LayoutKind.Sequential, Pack:=1, CharSet:=CharSet.Unicode)>
Public Structure JET_SIGNATURE
Public ulRandom As UInteger
Public logtimeCreate As JET_LOGTIME
<MarshalAs(UnmanagedType.ByValArray, SizeConst:=16)> Public szComputerName() As SByte
End Structure
<StructLayout(LayoutKind.Sequential, Pack:=4, CharSet:=CharSet.Unicode)>
Public Structure JET_COMMIT_ID
Public signLog As JET_SIGNATURE
Public reserved As Integer
Public commitId As Long
End Structureimport ctypes
from ctypes import wintypes
class JET_LOGTIME(ctypes.Structure):
_fields_ = [
("bSeconds", ctypes.c_byte),
("bMinutes", ctypes.c_byte),
("bHours", ctypes.c_byte),
("bDay", ctypes.c_byte),
("bMonth", ctypes.c_byte),
("bYear", ctypes.c_byte),
("Anonymous1", _Anonymous1_e__Union),
("Anonymous2", _Anonymous2_e__Union),
]
class JET_SIGNATURE(ctypes.Structure):
_pack_ = 1
_fields_ = [
("ulRandom", wintypes.DWORD),
("logtimeCreate", JET_LOGTIME),
("szComputerName", ctypes.c_byte * 16),
]
class JET_COMMIT_ID(ctypes.Structure):
_pack_ = 4
_fields_ = [
("signLog", JET_SIGNATURE),
("reserved", ctypes.c_int),
("commitId", ctypes.c_longlong),
]#[repr(C)]
pub struct JET_LOGTIME {
pub bSeconds: i8,
pub bMinutes: i8,
pub bHours: i8,
pub bDay: i8,
pub bMonth: i8,
pub bYear: i8,
pub Anonymous1: _Anonymous1_e__Union,
pub Anonymous2: _Anonymous2_e__Union,
}
#[repr(C, packed(1))]
pub struct JET_SIGNATURE {
pub ulRandom: u32,
pub logtimeCreate: JET_LOGTIME,
pub szComputerName: [i8; 16],
}
#[repr(C, packed(4))]
pub struct JET_COMMIT_ID {
pub signLog: JET_SIGNATURE,
pub reserved: i32,
pub commitId: i64,
}import "golang.org/x/sys/windows"
type JET_LOGTIME struct {
bSeconds int8
bMinutes int8
bHours int8
bDay int8
bMonth int8
bYear int8
Anonymous1 _Anonymous1_e__Union
Anonymous2 _Anonymous2_e__Union
}
type JET_SIGNATURE struct {
ulRandom uint32
logtimeCreate JET_LOGTIME
szComputerName [16]int8
}
type JET_COMMIT_ID struct {
signLog JET_SIGNATURE
reserved int32
commitId int64
}type
JET_LOGTIME = record
bSeconds: Shortint;
bMinutes: Shortint;
bHours: Shortint;
bDay: Shortint;
bMonth: Shortint;
bYear: Shortint;
Anonymous1: _Anonymous1_e__Union;
Anonymous2: _Anonymous2_e__Union;
end;
JET_SIGNATURE = packed record
ulRandom: DWORD;
logtimeCreate: JET_LOGTIME;
szComputerName: array[0..15] of Shortint;
end;
JET_COMMIT_ID = packed record
signLog: JET_SIGNATURE;
reserved: Integer;
commitId: Int64;
end;const JET_LOGTIME = extern struct {
bSeconds: i8,
bMinutes: i8,
bHours: i8,
bDay: i8,
bMonth: i8,
bYear: i8,
Anonymous1: _Anonymous1_e__Union,
Anonymous2: _Anonymous2_e__Union,
};
const JET_SIGNATURE = extern struct {
ulRandom: u32,
logtimeCreate: JET_LOGTIME,
szComputerName: [16]i8,
};
const JET_COMMIT_ID = extern struct {
signLog: JET_SIGNATURE,
reserved: i32,
commitId: i64,
};type
JET_LOGTIME {.bycopy.} = object
bSeconds: int8
bMinutes: int8
bHours: int8
bDay: int8
bMonth: int8
bYear: int8
Anonymous1: _Anonymous1_e__Union
Anonymous2: _Anonymous2_e__Union
JET_SIGNATURE {.packed.} = object
ulRandom: uint32
logtimeCreate: JET_LOGTIME
szComputerName: array[16, int8]
JET_COMMIT_ID {.packed.} = object
signLog: JET_SIGNATURE
reserved: int32
commitId: int64struct JET_LOGTIME
{
byte bSeconds;
byte bMinutes;
byte bHours;
byte bDay;
byte bMonth;
byte bYear;
_Anonymous1_e__Union Anonymous1;
_Anonymous2_e__Union Anonymous2;
}
align(1)
struct JET_SIGNATURE
{
uint ulRandom;
JET_LOGTIME logtimeCreate;
byte[16] szComputerName;
}
align(4)
struct JET_COMMIT_ID
{
JET_SIGNATURE signLog;
int reserved;
long commitId;
}HSP用 定義
HSP3.7/3.8 は構造体機能が無いため4byte整数配列(dim)+peek/poke で操作(32/64bitでサイズ・位置が異なる場合はタブで分割)。IronHSP は NSTRUCT(#defstruct/stdim/->)で32/64bit共通。
; HSP3.7/3.8 は構造体機能が無いため、4byte整数の配列変数で操作します。(x86 レイアウト)
; JET_COMMIT_ID サイズ: 48 バイト(x86)
dim st, 12 ; 4byte整数×12(構造体サイズ 48 / 4 切り上げ)
; signLog : JET_SIGNATURE (+0, 36byte) varptr(st)+0 を基点に操作(36byte:入れ子/配列)
; reserved : INT (+36, 4byte) st.9 = 値 / 値 = st.9 (lpoke/lpeek も可)
; commitId : LONGLONG (+40, 8byte) qpoke st,40,値 / qpeek(st,40) ※IronHSPのみ。3.7/3.8は lpoke st,40,下位 : lpoke st,44,上位
; ※4byte境界の整数は添字 st.N(N=オフセット/4)で読み書き可。それ以外は peek/poke 系を使用。; HSP3.7/3.8 は構造体機能が無いため、4byte整数の配列変数で操作します。(x64 レイアウト)
; JET_COMMIT_ID サイズ: 56 バイト(x64)
dim st, 14 ; 4byte整数×14(構造体サイズ 56 / 4 切り上げ)
; signLog : JET_SIGNATURE (+0, 44byte) varptr(st)+0 を基点に操作(44byte:入れ子/配列)
; reserved : INT (+44, 4byte) st.11 = 値 / 値 = st.11 (lpoke/lpeek も可)
; commitId : LONGLONG (+48, 8byte) qpoke st,48,値 / qpeek(st,48) ※IronHSPのみ。3.7/3.8は lpoke st,48,下位 : lpoke st,52,上位
; ※4byte境界の整数は添字 st.N(N=オフセット/4)で読み書き可。それ以外は peek/poke 系を使用。; IronHSP は NSTRUCT(構造体)をサポート。32bit/64bit どちらでも同じコードで動作します。
; ※GUID・入れ子構造体はデフォルト型でないため、依存する #defstruct を先に定義(下記に同梱)。
#defstruct global JET_LOGTIME
#field byte bSeconds
#field byte bMinutes
#field byte bHours
#field byte bDay
#field byte bMonth
#field byte bYear
#field byte Anonymous1 8
#field byte Anonymous2 8
#endstruct
#defstruct global JET_SIGNATURE, pack=1
#field int ulRandom
#field JET_LOGTIME logtimeCreate
#field char szComputerName 16
#endstruct
#defstruct global JET_COMMIT_ID, pack=4
#field JET_SIGNATURE signLog
#field int reserved
#field int64 commitId
#endstruct
stdim st, JET_COMMIT_ID ; NSTRUCT 変数を確保
st->reserved = 100
mes "reserved=" + st->reserved