DokanError IDokanOperations.ReadFile(string fileName, byte[] buffer, out int bytesRead, long offset,
DokanFileInfo info)
{
Log("ReadFile:{0}:{1}|lenght:[{2}]|offset:[{3}]", fileName,
info.Context, buffer.Length, offset);
if (info.Context == null)
{
//called when file is read as memory memory mapeded file usualy notepad and stuff
var handle = _sftpSession.RequestOpen(GetUnixPath(fileName), Flags.Read);
var data = _sftpSession.RequestRead(handle, (ulong)offset, (uint)buffer.Length);
_sftpSession.RequestClose(handle);
Buffer.BlockCopy(data, 0, buffer, 0, data.Length);
bytesRead = data.Length;
}
else
{
// var watch = Stopwatch.StartNew();
var stream = (info.Context as SftpContext).Stream;
lock (stream)
{
stream.Position = offset;
bytesRead = stream.Read(buffer, 0, buffer.Length);
}
// watch.Stop();
// Log("{0}",watch.ElapsedMilliseconds);
}
Log("END READ:{0},{1}", offset, info.Context);
return(DokanError.ErrorSuccess);
}
public override int Read(byte[] buffer, int offset, int count)
{
int readLen = 0;
// Lock down the file stream while we do this.
// Set up for the read operation.
SetupRead();
// Read data into the caller's buffer.
while (count > 0)
{
// How much data do we have available in the buffer?
int tempLen = _readBuffer.Length - _readBufferPosition;
if (tempLen <= 0)
{
_readBufferPosition = 0;
_readBuffer = _session.RequestRead(_handle, (ulong)_position, READ_BUFFER_SIZE);
if (_readBuffer.Length > 0)
{
tempLen = _readBuffer.Length;
}
else
{
break;
}
}
// Don't read more than the caller wants.
if (tempLen > count)
{
tempLen = count;
}
// Copy stream data to the caller's buffer.
Debug.WriteLine("Copy:{0},{1},{2},{3},{4}", _readBuffer, _readBufferPosition, buffer, offset, tempLen);
Buffer.BlockCopy(_readBuffer, _readBufferPosition, buffer, offset, tempLen);
// Advance to the next buffer positions.
readLen += tempLen;
offset += tempLen;
count -= tempLen;
_readBufferPosition += tempLen;
_position += tempLen;
}
// Return the number of bytes that were read to the caller.
return(readLen);
}
protected void Act()
{
_actual = _sftpSession.RequestRead(_handle, _offset, _length);
}
protected void Act()
{
_actual = _sftpSession.RequestRead(new byte[0], 0, 200);
}