private void WriteImpl(ref ByteSlice slice)
{
var offset = 0;
var bytesLeft = _capacity - _position;
var bytesToAlloc = slice.Count - bytesLeft;
if (bytesToAlloc > 0)
{
var numberOfSegments = Calculator.GetSegmentIndex(bytesToAlloc) + 1;
AddSegments(numberOfSegments);
}
// find initial segment to write
var index = Calculator.GetSegmentIndex(_position);
var currentSegment = FindSegment(index);
// intial segment selected, do writing
var toWrite = slice.Count;
do
{
var currentSegmentIndex = Calculator.GetIndexInSegment(_position);
var segmentBuffer = currentSegment->Buffer;
var spaceToWrite = currentSegment->Length - currentSegmentIndex;
spaceToWrite = spaceToWrite > toWrite ? toWrite : spaceToWrite;
if (spaceToWrite > 0)
{
slice.CopyTo(segmentBuffer, currentSegmentIndex, spaceToWrite, offset);
}
toWrite -= spaceToWrite;
_position += spaceToWrite;
offset += spaceToWrite;
currentSegment = currentSegment->Next;
} while (toWrite > 0);
if (_position > _length)
{
_length = _position;
}
}
public void Write(ByteChunk chunk)
{
var slice = new ByteSlice(chunk);
WriteImpl(ref slice);
}
public override void Write(byte[] buffer, int offset, int count)
{
var slice = new ByteSlice(buffer, offset, count);
WriteImpl(ref slice);
}
private void WriteImpl(ref ByteSlice slice)
{
var offset = 0;
var bytesLeft = _capacity - _position;
var bytesToAlloc = slice.Count - bytesLeft;
if (bytesToAlloc > 0)
{
var numberOfSegments = Calculator.GetSegmentIndex(bytesToAlloc) + 1;
AddSegments(numberOfSegments);
}
// find initial segment to write
var index = Calculator.GetSegmentIndex(_position);
var currentSegment = FindSegment(index);
// intial segment selected, do writing
var toWrite = slice.Count;
do
{
var currentSegmentIndex = Calculator.GetIndexInSegment(_position);
var segmentBuffer = currentSegment->Buffer;
var spaceToWrite = currentSegment->Length - currentSegmentIndex;
spaceToWrite = spaceToWrite > toWrite ? toWrite : spaceToWrite;
if (spaceToWrite > 0)
{
slice.CopyTo(segmentBuffer, currentSegmentIndex, spaceToWrite, offset);
}
toWrite -= spaceToWrite;
_position += spaceToWrite;
offset += spaceToWrite;
currentSegment = currentSegment->Next;
} while (toWrite > 0);
if (_position > _length)
{
_length = _position;
}
}
public int Read(ByteChunk chunk)
{
var slice = new ByteSlice(chunk);
return ReadImpl(ref slice);
}
public override int Read(byte[] buffer, int offset, int count)
{
var slice = new ByteSlice(buffer, offset, count);
return ReadImpl(ref slice);
}
private int ReadImpl(ref ByteSlice slice)
{
if (_position >= _length)
return 0;
var alreadyCopied = 0;
var toCopy = Math.Min(slice.Count, _length - _position);
while (toCopy > 0)
{
var index = Calculator.GetSegmentIndex(_position);
var indexInSegment = Calculator.GetIndexInSegment(_position);
var segment = FindSegment(index);
var bytesToRead = Math.Min(segment->Length - indexInSegment, toCopy);
if (bytesToRead > 0)
{
var segmentBuffer = segment->Buffer;
slice.CopyFrom(alreadyCopied, segmentBuffer, indexInSegment, bytesToRead);
alreadyCopied += bytesToRead;
toCopy -= bytesToRead;
_position += bytesToRead;
}
}
return alreadyCopied;
}
public void Write(ByteChunk chunk)
{
var slice = new ByteSlice(chunk);
WriteImpl(ref slice);
}
public override void Write(byte[] buffer, int offset, int count)
{
var slice = new ByteSlice(buffer, offset, count);
WriteImpl(ref slice);
}
public int Read(ByteChunk chunk)
{
var slice = new ByteSlice(chunk);
return(ReadImpl(ref slice));
}
public override int Read(byte[] buffer, int offset, int count)
{
var slice = new ByteSlice(buffer, offset, count);
return(ReadImpl(ref slice));
}
