/// <summary>
/// Read new DataBlock from filled page segment
/// </summary>
public DataBlock(DataPage page, byte index, BufferSlice segment)
{
_page = page;
_segment = segment;
this.Position = new PageAddress(page.PageID, index);
// byte 00: Extend
this.Extend = segment.ReadBool(P_EXTEND);
// byte 01-05: NextBlock (PageID, Index)
this.NextBlock = segment.ReadPageAddress(P_NEXT_BLOCK);
// byte 06-EOL: Buffer
this.Buffer = segment.Slice(P_BUFFER, segment.Count - P_BUFFER);
}
/// <summary>
/// Create new DataBlock and fill into buffer
/// </summary>
public DataBlock(DataPage page, byte index, BufferSlice segment, bool extend, PageAddress nextBlock)
{
_page = page;
_segment = segment;
this.Position = new PageAddress(page.PageID, index);
this.NextBlock = nextBlock;
this.Extend = extend;
// byte 00: Data Index
segment.Write(extend, P_EXTEND);
// byte 01-05 (can be updated in "UpdateNextBlock")
segment.Write(nextBlock, P_NEXT_BLOCK);
// byte 06-EOL: Buffer
this.Buffer = segment.Slice(P_BUFFER, segment.Count - P_BUFFER);
page.IsDirty = true;
}
