/// <summary>
/// Serializes the table of contents and its B-Trees.
/// </summary>
public byte[] Serialize()
{
using var ms = new MemoryStream();
using var bs = new BinaryStream(ms, ByteConverter.Big);
bs.Write(SEGMENT_MAGIC);
bs.Position = 16;
bs.WriteUInt32((uint)Files.Count);
bs.Position += sizeof(uint) * Files.Count;
uint fileNamesOffset = (uint)bs.Position;
FileNames.Serialize(bs);
uint extOffset = (uint)bs.Position;
Extensions.Serialize(bs);
uint fileInfoOffset = (uint)bs.Position;
FileInfos.Serialize(bs);
// The list of file entry btrees mostly consist of the relation between files, folder, extensions and data
// Thus it is writen at the end
// Each tree is a seperate general subdir
const int baseListPos = 20;
for (int i = 0; i < Files.Count; i++)
{
FileEntryBTree f = Files[i];
uint treeOffset = (uint)bs.Position;
bs.Position = baseListPos + (i * sizeof(uint));
bs.WriteUInt32(treeOffset);
bs.Position = treeOffset;
f.Serialize(bs, (uint)FileNames.Entries.Count, (uint)Extensions.Entries.Count);
}
// Go back to write the meta data
bs.Position = 4;
bs.WriteUInt32(fileNamesOffset);
bs.WriteUInt32(extOffset);
bs.WriteUInt32(fileInfoOffset);
return(ms.ToArray());
}