private bool CanReadString()
{
if (_ftPage.IsLastPage)
return false;
byte[] buffer = _ftPage.GetNextPageBuffer();
if (_reader != null)
{
_reader.Dispose();
}
_reader = new FTStreamReader(buffer);
return true;
}
private bool CanReadData(int length)
{
if(_reader == null || _reader.Position + length > _reader.Length)
{
if (_ftPage.IsLastPage)
{
return false;
}
else
{
int reading = 0;
if(_reader == null)
reading = length;
else
{
reading = length - (int)(_reader.Length - _reader.Position);
}
List<byte[]> bufferList = new List<byte[]>(2);
int readedCount = 0;
do
{
LogWriter.Instance.WriteLine("---------------------------------------------------------------------------------------------------");
LogWriter.Instance.WriteLine("current page is end. will read next page");
LogWriter.Instance.WriteLine("---------------------------------------------------------------------------------------------------");
byte[] bufferTemp = _ftPage.GetNextPageBuffer();
bufferList.Add(bufferTemp);
reading -= bufferTemp.Length;
readedCount += bufferTemp.Length;
LogWriter.Instance.WriteLine("---------------------------------------------------------------------------------------------------");
LogWriter.Instance.Write("next page bytes index is :");
LogWriter.Instance.Write(_ftPage.CurrentPageIndex.ToString());
LogWriter.Instance.Write(". Length is :");
LogWriter.Instance.WriteLine(bufferTemp.Length.ToString());
LogWriter.Instance.WriteLine("---------------------------------------------------------------------------------------------------");
} while (reading > 0);
byte[] buffer = new byte[readedCount];
reading = 0;
foreach (byte[] eachBuffer in bufferList)
{
Array.Copy(eachBuffer, 0, buffer, reading, eachBuffer.Length);
reading += eachBuffer.Length;
}
if (_reader == null)
{
_reader = new FTStreamReader(buffer);
}
else if (_reader.Position == _reader.Length)
{
_reader.Dispose();
_reader = new FTStreamReader(buffer);
}
else
{
byte[] lastBuffer = _reader.ReadBytes((int)(_reader.Length - _reader.Position));
byte[] allBuffer = new byte[lastBuffer.Length + buffer.Length];
Array.Copy(lastBuffer, 0, allBuffer, 0, lastBuffer.Length);
Array.Copy(buffer, 0, allBuffer, lastBuffer.Length, buffer.Length);
_reader.Dispose();
_reader = new FTStreamReader(allBuffer);
}
}
}
return true;
}
