protected override IEnumerable <UndoFormatEntry> GetEntries(Stream s, UndoFormatArgs args)
{
List <ChunkHeader> list = new List <ChunkHeader>();
UndoFormatEntry pos;
UndoCacheItem item = default(UndoCacheItem);
bool super = Player.IsSuper(args.Player);
DateTime start = args.Start;
ReadHeaders(list, s);
for (int i = list.Count - 1; i >= 0; i--)
{
ChunkHeader chunk = list[i];
// Can we safely discard the entire chunk?
bool inRange = chunk.BaseTime.AddTicks((65536 >> 2) * TimeSpan.TicksPerSecond) >= start;
if (!inRange)
{
args.Stop = true; yield break;
}
if (!super && !args.Player.level.name.CaselessEq(chunk.LevelName))
{
continue;
}
pos.LevelName = chunk.LevelName;
s.Seek(chunk.DataPosition, SeekOrigin.Begin);
if (args.Temp == null)
{
args.Temp = new byte[ushort.MaxValue * entrySize];
}
s.Read(args.Temp, 0, chunk.Entries * entrySize);
byte[] temp = args.Temp;
for (int j = chunk.Entries - 1; j >= 0; j--)
{
int offset = j * entrySize;
item.Flags = U16(temp, offset + 0);
pos.Time = chunk.BaseTime.AddTicks((item.Flags & 0x3FFF) * TimeSpan.TicksPerSecond);
if (pos.Time < start)
{
args.Stop = true; yield break;
}
int index = I32(temp, offset + 2);
pos.X = (ushort)(index % chunk.Width);
pos.Y = (ushort)((index / chunk.Width) / chunk.Length);
pos.Z = (ushort)((index / chunk.Width) % chunk.Length);
item.Type = temp[offset + 6];
item.NewType = temp[offset + 7];
item.GetBlock(out pos.Block, out pos.ExtBlock);
item.GetNewBlock(out pos.NewBlock, out pos.NewExtBlock);
yield return(pos);
}
}
}
protected override IEnumerable <UndoFormatEntry> GetEntries(Stream s, UndoFormatArgs args)
{
UndoCacheNode node = cache.Tail;
if (node == null)
{
yield break;
}
UndoFormatEntry pos;
bool super = Player.IsSuper(args.Player);
DateTime start = args.Start;
while (node != null)
{
Level lvl = LevelInfo.FindExact(node.MapName);
if (!super && !args.Player.level.name.CaselessEq(node.MapName))
{
node = node.Prev; continue;
}
List <UndoCacheItem> items = node.Items;
pos.LevelName = node.MapName;
for (int i = items.Count - 1; i >= 0; i--)
{
UndoCacheItem item = items[i];
DateTime time = node.BaseTime.AddTicks(item.TimeDelta * TimeSpan.TicksPerSecond);
if (time < start)
{
args.Stop = true; yield break;
}
pos.Time = time;
node.Unpack(item.Index, out pos.X, out pos.Y, out pos.Z);
item.GetBlock(out pos.Block, out pos.ExtBlock);
item.GetNewBlock(out pos.NewBlock, out pos.NewExtBlock);
yield return(pos);
}
node = node.Prev;
}
}