public ReadWriteBytes(Collections.Sequences.Position first, Collections.Sequences.Position last)
{
(_start, _startIndex) = first.Get <object>();
(_end, _endIndex) = last.Get <object>();
Validate();
}
public ReadWriteBytes Slice(Collections.Sequences.Position start, Collections.Sequences.Position end)
{
var kind = Kind;
switch (kind)
{
case Type.Array:
var(array, index) = start.Get <byte[]>();
return(new ReadWriteBytes(array, index, (int)end - index));
case Type.MemoryList:
var(startList, startIndex) = start.Get <IMemoryList <byte> >();
var(endList, endIndex) = end.Get <IMemoryList <byte> >();
return(new ReadWriteBytes(startList, startIndex, endList, endIndex));
default:
throw new NotImplementedException();
}
}
public ReadWriteBytes Slice(Collections.Sequences.Position position)
{
var kind = Kind;
switch (kind)
{
case Type.Array:
var(array, index) = position.Get <byte[]>();
return(new ReadWriteBytes(array, index, array.Length - index));
case Type.MemoryList:
return(Slice(position, Collections.Sequences.Position.Create((IMemoryList <byte>)_end, _endIndex)));
default: throw new NotImplementedException();
}
}
public bool TryGet(ref Collections.Sequences.Position position, out Memory <byte> item, bool advance = true)
{
if (position == default)
{
item = default;
return(false);
}
var(list, index) = position.Get <MemoryList>();
item = list._data.Slice(index);
if (advance)
{
position = Collections.Sequences.Position.Create(list._next);
}
return(true);
}
public bool TryGet(ref Collections.Sequences.Position position, out Memory <byte> item, bool advance = true)
{
if (position == default)
{
item = default;
return(false);
}
var array = _start as byte[];
if (array != null)
{
var start = _startIndex + (int)position;
var length = _endIndex - _startIndex - (int)position;
item = new Memory <byte>(array, start, length);
if (advance)
{
position = default;
}
return(true);
}
if (Kind == Type.MemoryList)
{
var(node, index) = position.Get <IMemoryList <byte> >();
item = node.Memory.Slice(index);
if (ReferenceEquals(node, _end))
{
item = item.Slice(0, _endIndex - index);
if (advance)
{
position = default;
}
}
else
{
if (advance)
{
position = Collections.Sequences.Position.Create(node.Next);
}
}
return(true);
}
throw new NotImplementedException();
}