public int Seek(int char0)
{
if (IsDefault)
{
return -1;
}
var byte0 = (byte)char0;
var vectorStride = Vector<byte>.Count;
var ch0Vector = new Vector<byte>(byte0);
var block = _block;
var index = _index;
var array = block.Array;
while (true)
{
while (block.End == index)
{
if (block.Next == null)
{
_block = block;
_index = index;
return -1;
}
block = block.Next;
index = block.Start;
array = block.Array;
}
while (block.End != index)
{
var following = block.End - index;
if (following >= vectorStride)
{
var data = new Vector<byte>(array, index);
var ch0Equals = Vector.Equals(data, ch0Vector);
var ch0Count = Vector.Dot(ch0Equals, _dotCount);
if (ch0Count == 0)
{
index += vectorStride;
continue;
}
else if (ch0Count == 1)
{
_block = block;
_index = index + Vector.Dot(ch0Equals, _dotIndex);
return char0;
}
else
{
following = vectorStride;
}
}
while (following > 0)
{
if (block.Array[index] == byte0)
{
_block = block;
_index = index;
return char0;
}
following--;
index++;
}
}
}
}