public void Commit(EndianWriterEx writer)
{
if (!hasChanged)
{
return;
}
if (BlockRef != null && EntryCount != BlockRef.Count)
{
stream.ResizeTagBlock(writer, ref blockRef, EntrySize, EntryCount);
//we dont know if our parent has already been written (or even will be)
//just to be sure, we need to go back and update it with the new reference
var refOffset = ParentBlock.EntrySize * ParentEntryIndex + OffsetInParent;
writer.Seek(ParentBlock.PhysicalAddress + refOffset, SeekOrigin.Begin);
BlockRef.Write(writer, null);
}
var rootAddress = BlockRef?.Pointer.Address ?? OffsetInParent;
if (EntryCount > 0)
{
writer.Seek(rootAddress, SeekOrigin.Begin);
writer.Write(data); //this writes our virtual pointers to disk (fix them below)
}
//the block references in our data array currently use virtual pointers
//this restores the original pointers that got overwritten above
foreach (var child in ChildBlocks)
{
writer.Seek(rootAddress + EntrySize * child.ParentEntryIndex + child.OffsetInParent + 4, SeekOrigin.Begin);
writer.Write(child.BlockRef.Pointer.Value);
}
hasChanged = false;
}
