private void FindLastLinesInStream(Stream stream)
{
if (_lastLinesProcessed ||
Configs.LinesStartFrom != NumLinesStart.End)
{
return;
}
if (_startFromNum != 0)
{
var logicalLinesHistory = new LogicalLinesHistoryQueue(
_startFromNum * (Configs.ContextLines + 1));
if (stream.CanSeek)
{
if (!ProcessStreamInPages(stream, logicalLinesHistory))
{
// optimization is not working, try without optimization
ResetCounters();
logicalLinesHistory.Clear();
ProcessStreamFromLastPosToEnd(stream, logicalLinesHistory);
}
}
else
{
ProcessStreamFromLastPosToEnd(stream, logicalLinesHistory);
}
FlushLogicalLine(logicalLinesHistory);
while (logicalLinesHistory.Any())
{
var forPrinting = new LogicalLinesHistoryQueue();
PrepareLogicalLineForPrinting(logicalLinesHistory.Dequeue(), forPrinting);
PrintLogicalLines(forPrinting);
}
}
LastPos = FileSize;
_lastLinesProcessed = true;
}
private void PrintLogicalLines(LogicalLinesHistoryQueue logicalLines)
{
lock (_bl.PrintLock)
{
PrintFileName();
while (logicalLines.Any())
{
var logicalLine = logicalLines.Dequeue();
if (!logicalLine.IsPrinted)
{
if (Configs.IsContextUsed &&
Math.Abs(logicalLine.LineNumber - _lastPrintedLine) > 1)
{
_bl.PrintLogicalLine(TailPbl.GetContextDelimiter(), _fileIndex);
}
_bl.PrintLogicalLine(logicalLine, _fileIndex);
_lastPrintedLine = logicalLine.LineNumber;
}
}
}
}