public LogPageRstr(byte[] rawBytes, int offset)
{
var index = 0x0;
var sigCheck = BitConverter.ToInt32(rawBytes, index);
if (sigCheck != RstrSig && sigCheck != ChkdSig)
{
{
throw new Exception("Invalid signature! Expected 'RSTR|CHKD' signature.");
}
}
Offset = offset;
index += 4;
var fixupOffset = BitConverter.ToInt16(rawBytes, index);
index += 2;
var numFixupPairs = BitConverter.ToInt16(rawBytes, index);
index += 2;
CheckDiskLsn = BitConverter.ToInt64(rawBytes, index);
index += 8;
SystemPageSize = BitConverter.ToInt32(rawBytes, index);
index += 4;
LogPageSize = BitConverter.ToInt32(rawBytes, index);
index += 4;
RestartOffset = BitConverter.ToInt16(rawBytes, index);
index += 2;
MinorFormatVersion = BitConverter.ToInt16(rawBytes, index);
index += 2;
MajorFormatVersion = BitConverter.ToInt16(rawBytes, index);
index += 2;
var fixupTotalLength = numFixupPairs * 2;
var fixupBuffer = new byte[fixupTotalLength];
Buffer.BlockCopy(rawBytes, fixupOffset, fixupBuffer, 0, fixupTotalLength);
var fixupData = new FixupData(fixupBuffer);
var fixupOk = true;
//fixup verification
var counter = 512;
foreach (var bytese in fixupData.FixupActual)
{
//adjust the offset to where we need to check
var fixupOffset1 = counter - 2;
var expected = BitConverter.ToInt16(rawBytes, fixupOffset1);
if (expected != fixupData.FixupExpected)
{
fixupOk = false;
_logger.Warn($"Fixup values do not match at 0x{fixupOffset1:X}. Expected: 0x{fixupData.FixupExpected:X2}, actual: 0x{expected:X2}");
}
//replace fixup expected with actual bytes. bytese has actual replacement values in it.
Buffer.BlockCopy(bytese, 0, rawBytes, fixupOffset1, 2);
counter += 512;
}
index += fixupTotalLength;
while (index % 8 != 0)
{
index += 1;
}
CurrentLsn = BitConverter.ToInt64(rawBytes, index);
index += 8;
LogClientCount = BitConverter.ToInt16(rawBytes, index);
index += 2;
ClientFreeList = BitConverter.ToInt16(rawBytes, index);
index += 2;
ClientInUseList = BitConverter.ToInt16(rawBytes, index);
index += 2;
Flags = (RestartFlag)BitConverter.ToInt16(rawBytes, index);
index += 2;
SeqNumBits = BitConverter.ToInt32(rawBytes, index);
index += 4;
RestartAreaLen = BitConverter.ToInt16(rawBytes, index);
index += 2;
ClientArrayOffset = BitConverter.ToInt16(rawBytes, index);
index += 2;
LogFileSize = BitConverter.ToInt64(rawBytes, index);
index += 8;
LastLsnDataLen = BitConverter.ToInt32(rawBytes, index);
index += 4;
RecordHeaderLen = BitConverter.ToInt16(rawBytes, index);
index += 2;
LogPageDataOffset = BitConverter.ToInt16(rawBytes, index);
index += 2;
RevisionNumber = BitConverter.ToInt32(rawBytes, index);
index = 0x30 + ClientArrayOffset;
ClientRecords = new List <ClientRecord>();
for (var i = 0; i < LogClientCount; i++)
{
var buff = new byte[160]; //len of clientRecord
Buffer.BlockCopy(rawBytes, index, buff, 0, 160);
var cr = new ClientRecord(buff);
ClientRecords.Add(cr);
index += 160;
}
}
public LogPageRcrd(byte[] rawBytes, int offset)
{
var index = 0x0;
var sigCheck = BitConverter.ToInt32(rawBytes, index);
if (sigCheck != RcrdSig)
{
throw new Exception("Invalid signature! Expected 'RCRD' signature.");
}
Offset = offset;
index += 4;
var fixupOffset = BitConverter.ToInt16(rawBytes, index);
index += 2;
var numFixupPairs = BitConverter.ToInt16(rawBytes, index);
index += 2;
LastLogFileSequenceNumber = BitConverter.ToInt64(rawBytes, index);
index += 8;
Flags = BitConverter.ToInt32(rawBytes, index);
index += 4;
PageCount = BitConverter.ToInt16(rawBytes, index);
index += 2;
PagePosition = BitConverter.ToInt16(rawBytes, index);
index += 2;
FreeSpaceOffset = BitConverter.ToInt16(rawBytes, index);
index += 2;
var wordAlign = BitConverter.ToInt16(rawBytes, index);
index += 2;
var dwordAlign = BitConverter.ToInt32(rawBytes, index);
index += 4;
LastEndLogFileSequenceNumber = BitConverter.ToInt64(rawBytes, index);
index += 8;
var fixupTotalLength = numFixupPairs * 2;
var fixupBuffer = new byte[fixupTotalLength];
Buffer.BlockCopy(rawBytes, fixupOffset, fixupBuffer, 0, fixupTotalLength);
var fixupData = new FixupData(fixupBuffer);
var fixupOk = true;
//fixup verification
var counter = 512;
foreach (var bytese in fixupData.FixupActual)
{
//adjust the offset to where we need to check
var fixupOffset1 = counter - 2;
var expected = BitConverter.ToInt16(rawBytes, fixupOffset1);
if (expected != fixupData.FixupExpected)
{
fixupOk = false;
_logger.Warn($"Fixup values do not match at 0x{fixupOffset1:X}. Expected: 0x{fixupData.FixupExpected:X2}, actual: 0x{expected:X2}");
}
//replace fixup expected with actual bytes. bytese has actual replacement values in it.
Buffer.BlockCopy(bytese, 0, rawBytes, fixupOffset1, 2);
counter += 512;
}
index += fixupTotalLength;
while (index % 8 != 0)
{
index += 1;
}
//header is 0x58 bytes, so go past it
// index = 0x58;
_logger.Info($" LastLogFileSequenceNumber: 0x{LastLogFileSequenceNumber:X} Flags: {Flags} PageCount: 0x{PageCount:X} PagePosition: 0x{PagePosition:X} Free space offset: 0x{FreeSpaceOffset:X} LastEndLogFileSequenceNumber: 0x{LastEndLogFileSequenceNumber:X} LastLogFileSequenceNumber==LastEndLogFileSequenceNumber: {LastEndLogFileSequenceNumber==LastLogFileSequenceNumber}");
//record is 0x30 + clientDatalen long
Records = new List <Record>();
while (index < rawBytes.Length)
{
var so = index;
var thisLsn = BitConverter.ToInt64(rawBytes, index);
var prevLsn = BitConverter.ToInt64(rawBytes, index + 8);
var clientUndoLsn = BitConverter.ToInt64(rawBytes, index + 16);
// _logger.Info($" this: {thisLsn:X} prev: {prevLsn:X} undo: {clientUndoLsn:X}");
var clientDataLen = BitConverter.ToInt32(rawBytes, index + 24);
var buff = new byte[clientDataLen + 0x30];
Buffer.BlockCopy(rawBytes, index, buff, 0, buff.Length);
var rec = new Record(buff);
Records.Add(rec);
index += buff.Length;
_logger.Info($" Record: {rec}");
if (thisLsn == LastEndLogFileSequenceNumber)
{
_logger.Warn($"At last LSN in this page (0x{thisLsn:X}). found it at offset 0x{so:X}\r\n");
break;
}
}
//Debug.WriteLine($"at abs offset: 0x{(offset+index):X}, RCRD Offset: 0x{Offset:X}");
}