public void Close()
{
if (_isDouble4CJob)
{
FileStream1.Close();
FileStream2.Close();
}
else
{
FileStream1.Close();
}
}
public long Seek(long offset, SeekOrigin origin)
{
try
{
switch (origin)
{
case SeekOrigin.Begin:
{
_curPos = offset;
break;
}
case SeekOrigin.Current:
{
_curPos += offset;
break;
}
case SeekOrigin.End:
{
_curPos -= offset;
break;
}
}
if (_isDouble4CJob)
{
long maxstep1 = 0;
long maxstep2 = 0;
long maxStep = GetMaxStep(ref maxstep1, ref maxstep2);
if (_curPos > HEADERSIZE)
{
bool bReadFile1 = ((_curPos - HEADERSIZE) % maxStep) < maxstep1;
int stepNum = (int)((_curPos - HEADERSIZE) / maxStep);
if (bReadFile1)
{
FileStream1.Seek((long)stepNum * (long)maxstep1 + (long)(_curPos - HEADERSIZE) % stepNum + HEADERSIZE, SeekOrigin.Begin);
FileStream2.Seek((long)stepNum * (long)maxstep2 + HEADERSIZE, SeekOrigin.Begin);
}
else
{
FileStream1.Seek((long)(stepNum + 1) * (long)maxstep1 + HEADERSIZE, SeekOrigin.Begin);
FileStream2.Seek((long)stepNum * (long)maxstep2 + ((long)(_curPos - HEADERSIZE) % stepNum - maxstep1) + HEADERSIZE, SeekOrigin.Begin);
}
}
else
{
FileStream1.Seek(_curPos, SeekOrigin.Begin);
FileStream2.Seek(HEADERSIZE, SeekOrigin.Begin);
}
}
else
{
FileStream1.Seek(_curPos, origin);
}
return(_curPos);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return(_curPos);
}
}
public int Read(byte[] array, int offset, int count)
{
int ret = 0;
if (_isDouble4CJob)
{
long maxstep1 = 0;
long maxstep2 = 0;
long maxStep = GetMaxStep(ref maxstep1, ref maxstep2);
int readedCount = 0;
int suboffset = 0;
int allcount = count;
while (allcount > readedCount)
{
if (_curPos == 0 && count >= HEADERSIZE)
{
ReadHeader(array);
_curPos += HEADERSIZE;
count -= HEADERSIZE;
readedCount += HEADERSIZE;
suboffset += HEADERSIZE;
FileStream1.Seek(HEADERSIZE, SeekOrigin.Begin);
}
int len = 0;
bool bReadFile1 = ((_curPos - HEADERSIZE) % maxStep) < maxstep1;
if (bReadFile1)
{
int readlen = (int)Math.Min(maxstep1 - (_curPos - HEADERSIZE) % maxStep, allcount - readedCount);
len = FileStream1.Read(array, suboffset, readlen);
LogWriter.SaveOptionLog(string.Format("FileStream1.Read pos={0},readlen={1},retlen={2}", FileStream1.Position, readlen, len));
if (len != readlen && FileStream1.Position != FileStream1.Length)
{
MessageBox.Show("Read file error!!");
}
}
else
{
int readlen =
(int)
Math.Min(maxstep2 - ((_curPos - HEADERSIZE) % maxStep - maxstep1), allcount - readedCount);
len = FileStream2.Read(array, suboffset, readlen);
LogWriter.SaveOptionLog(string.Format("FileStream2.Read pos={0},readlen={1},retlen={2}", FileStream2.Position, readlen, len));
if (len != readlen && FileStream1.Position != FileStream1.Length)
{
MessageBox.Show("Read file error!!");
}
}
if (len > 0)
{
readedCount += len;
suboffset += len;
_curPos += len;
}
if (fileStream1.Position == fileStream1.Length ||
fileStream2.Position == fileStream2.Length)
{
break;
}
//bReadFile1 = !bReadFile1;
}
ret = readedCount;
}
else
{
ret = FileStream1.Read(array, offset, count);
LogWriter.SaveOptionLog(string.Format("FileStream1.Read pos={0},readlen={1},retlen={2}", FileStream1.Position, count, ret));
if (ret != count && FileStream1.Position != FileStream1.Length)
{
MessageBox.Show("Read file error!!");
}
}
return(ret);
}