internal static int ReadBytesFromSocketBuffer(byte[] buffer, int offset, int count, SocketBuffer socketBuffer)
{
int byteToRead = (int)socketBuffer.UnreadBytes > count ? count : (int)socketBuffer.UnreadBytes;
Buffer.BlockCopy(socketBuffer.Buffer, (int)socketBuffer.ReadIndex, buffer, offset, byteToRead);
socketBuffer.BytesRead(byteToRead);
return(byteToRead);
}
internal static byte[] ReadBytesFromSocketBuffer(int count, SocketBuffer socketBuffer)
{
if (count > socketBuffer.UnreadBytes)
{
throw new Exception("Did not find enough data to read.");
}
var retBytes = new byte[count];
Buffer.BlockCopy(socketBuffer.Buffer, (int)socketBuffer.ReadIndex, retBytes, 0, count);
socketBuffer.BytesRead(count);
return(retBytes);
}
public override long Seek(long offset, SeekOrigin origin)
{
switch (origin)
{
case SeekOrigin.Begin:
{
if (offset < 0 || _commandLength < offset)
{
throw new ArgumentOutOfRangeException("offset");
}
_position = offset;
_currBufferIndex = 0;
for (int i = 0; i < _buffers.Count; i++)
{
if (i == 0)
{
_buffers[i].BytesRead(_commandStart - (int)_buffers[i].ReadIndex);
}
else
{
_buffers[i].BytesRead(0 - _buffers[i].ReadIndex);
}
}
while (offset > 0)
{
SocketBuffer currentBuffer = _buffers[_currBufferIndex];
if (currentBuffer.UnreadBytes < offset)
{
offset -= currentBuffer.UnreadBytes;
currentBuffer.BytesRead(currentBuffer.UnreadBytes);
_currBufferIndex++;
}
else
{
currentBuffer.BytesRead(offset);
}
}
break;
}
case SeekOrigin.Current:
{
long tempPosition = unchecked (_position + offset);
if (tempPosition < 0 || tempPosition > _commandLength)
{
throw new IOException("IO.IO_SeekBeforeBegin");
}
_position = tempPosition;
if (offset < 0)
{
while (offset < 0)
{
SocketBuffer currentBuffer = _buffers[_currBufferIndex];
currentBuffer.BytesRead(0 - currentBuffer.ReadIndex);
if (currentBuffer.ReadIndex + offset < 0)
{
offset += currentBuffer.ReadIndex;
currentBuffer.BytesRead(0 - currentBuffer.ReadIndex);
_currBufferIndex--;
}
else
{
currentBuffer.BytesRead(offset);
}
}
}
else
{
while (offset > 0)
{
SocketBuffer currentBuffer = _buffers[_currBufferIndex];
if (currentBuffer.UnreadBytes < offset)
{
offset -= currentBuffer.UnreadBytes;
currentBuffer.BytesRead(currentBuffer.UnreadBytes);
_currBufferIndex++;
}
else
{
currentBuffer.BytesRead(offset);
}
}
}
break;
}
case SeekOrigin.End:
{
if (offset > 0 || _commandLength < -1 * offset)
{
throw new ArgumentOutOfRangeException("offset");
}
_currBufferIndex = _buffers.Count - 1;
_position = _commandLength + offset;
for (int i = _buffers.Count - 1; i >= 0; i--)
{
if (i == _buffers.Count - 1)
{
_buffers[i].BytesRead(_commandEnd - _buffers[i].ReadIndex);
}
else
{
_buffers[i].BytesRead(_buffers[i].UnreadBytes);
}
}
while (offset < 0)
{
SocketBuffer currentBuffer = _buffers[_currBufferIndex];
if (currentBuffer.ReadIndex + offset < 0)
{
offset += currentBuffer.ReadIndex;
currentBuffer.BytesRead(0 - currentBuffer.ReadIndex);
_currBufferIndex--;
}
else
{
currentBuffer.BytesRead(offset);
}
}
break;
}
default: throw new ArgumentException("Argument_InvalidSeekOrigin");
}
return(_position);
}