protected override sealed void FillBuffer()
{
if (_ofs == _valueSize)
{
Pos = -1;
End = -1;
return;
}
End = _stream.Read(Buf, 0, Buf.Length, _ofs);
_ofs += (ulong)End;
Pos = 0;
}
protected sealed override void FillBuffer()
{
if (_ofs == _valueSize)
{
Pos = -1;
End = -1;
return;
}
End = _stream.Read(Buf.AsSpan(), _ofs);
_ofs += (ulong)End;
Pos = 0;
}
public void Init(ref SpanReader spanReader)
{
if (_usedLen == 0)
{
var read = _stream.Read(_buf, _ofs);
spanReader.Buf = _buf.AsSpan(0, read);
_usedOfs = 0;
_usedLen = (uint)read;
_ofs += (uint)read;
return;
}
spanReader.Buf = _buf.AsSpan((int)_usedOfs, (int)_usedLen);
}
public int Read(Span <byte> data, ulong pos)
{
int res = _positionLessStream.Read(data, pos);
Log("read size:{2}/{0} pos:{1}", data.Length, pos, res);
int i = 0;
int j = 0;
var sb = new StringBuilder(8 + 16 * 3);
while (i < res)
{
if (j == 16)
{
Log(sb.ToString());
sb.Length = 0;
j = 0;
}
if (j == 0)
{
sb.AppendFormat("{0:X8}", pos + (uint)i);
}
sb.AppendFormat(" {0:X2}", data[i]);
j++;
i++;
}
if (j > 0)
{
Log(sb.ToString());
}
return(res);
}
public int Read(byte[] data, int offset, int size, ulong pos)
{
int res = _positionLessStream.Read(data, offset, size, pos);
Log("read size:{2}/{0} pos:{1} datalen:{3} dataofs:{4}", size, pos, res, data.Length, offset);
int i = 0;
int j = 0;
var sb = new StringBuilder(8 + 16 * 3);
while (i < res)
{
if (j == 16)
{
Log(sb.ToString());
sb.Length = 0;
j = 0;
}
if (j == 0)
{
sb.AppendFormat("{0:X8}", pos + (uint)i);
}
sb.AppendFormat(" {0:X2}", data[offset + i]);
j++;
i++;
}
if (j > 0)
{
Log(sb.ToString());
}
return(res);
}
public bool Open(IPositionLessStream positionLessStream, bool dispose)
{
lock (_log)
{
_log.WriteUInt8((byte)KVReplayOperation.Open);
ulong size = positionLessStream.GetSize();
_log.WriteVUInt64(size);
ulong pos = 0;
var buf = new byte[4096];
while (pos < size)
{
var read = positionLessStream.Read(buf, 0, buf.Length, pos);
// Next 2 conditions should not happen or file is mutated when it should not
if (read == 0)
{
break;
}
if ((ulong)read > size - pos)
{
read = (int)(size - pos);
}
_log.WriteBlock(buf, 0, read);
pos += (ulong)read;
}
while (pos < size)
{
_log.WriteUInt8(0);
pos++;
}
_log.FlushBuffer();
}
return(_db.Open(positionLessStream, dispose));
}
public bool Open(IPositionLessStream positionLessStream, bool dispose)
{
lock (_log)
{
_log.WriteUInt8((byte)KVReplayOperation.Open);
ulong size = positionLessStream.GetSize();
_log.WriteVUInt64(size);
ulong pos = 0;
var buf = new byte[4096];
while (pos < size)
{
var read = positionLessStream.Read(buf, 0, buf.Length, pos);
// Next 2 conditions should not happen or file is mutated when it should not
if (read == 0) break;
if ((ulong)read > size - pos) read = (int)(size - pos);
_log.WriteBlock(buf, 0, read);
pos += (ulong)read;
}
while (pos < size)
{
_log.WriteUInt8(0);
pos++;
}
_log.FlushBuffer();
}
return _db.Open(positionLessStream, dispose);
}
public bool Open(IPositionLessStream positionLessStream, bool dispose)
{
if (positionLessStream == null) throw new ArgumentNullException("positionLessStream");
_positionLessStream = positionLessStream;
_disposeStream = dispose;
_spaceSoonReusable = null;
_freeSpaceAllocatorOptimizer.GlobalInvalidate();
_wasAnyCommits = false;
bool newDB = false;
if (positionLessStream.GetSize() == 0)
{
InitEmptyDB();
newDB = true;
}
else
{
if (_positionLessStream.Read(_headerData, 0, TotalHeaderSize, 0) != TotalHeaderSize)
{
throw new BTDBException("Too short header");
}
_totalBytesRead += TotalHeaderSize;
if (_headerData[0] != (byte)'B' || _headerData[1] != (byte)'T' || _headerData[2] != (byte)'D'
|| _headerData[3] != (byte)'B' || _headerData[4] != (byte)'1' || _headerData[5] != (byte)'0'
|| _headerData[6] != (byte)'0' || _headerData[7] != (byte)'2')
{
throw new BTDBException("Wrong header");
}
}
_newState.Position = FirstRootOffset;
_currentState.Position = SecondRootOffset;
if (RetrieveStateFromHeaderBuffer(_newState))
{
if (RetrieveStateFromHeaderBuffer(_currentState))
{
if (_currentState.TransactionCounter != _newState.TransactionCounter)
{
if (_currentState.TransactionCounter > _newState.TransactionCounter)
{
SwapCurrentAndNewState();
}
if (!CheckDB(_newState))
{
if (CheckDB(_currentState))
{
SwapCurrentAndNewState();
}
else
{
ThrowDatabaseCorrupted();
}
}
}
}
else
{
if (!CheckDB(_newState))
{
ThrowDatabaseCorrupted();
}
}
}
else
{
SwapCurrentAndNewState();
if (RetrieveStateFromHeaderBuffer(_newState) == false)
{
throw new BTDBException("Both root headers corrupted");
}
if (!CheckDB(_newState))
{
ThrowDatabaseCorrupted();
}
}
TransferNewStateToCurrentState();
if (_currentState.TransactionAllocSize > 0)
{
throw new BTDBException("TransactionLog is not supported");
}
return newDB;
}
