private void SkipAttribute(DataReader mReader)
{
ulong size = mReader.ReadPackedUInt64();
if(size > (ulong)mReader.Remaining)
throw new InvalidDataException();
mReader.Skip((long)size);
}
private void ReadUnpackInfo(DataReader mReader, out FolderInfo[] folders)
{
WaitAttribute(mReader, BlockType.Folder);
{
int numFolders = mReader.ReadPackedUInt31();
folders = new FolderInfo[numFolders];
for(int i = 0; i < folders.Length; i++)
folders[i] = GetNextFolderItem(mReader);
}
WaitAttribute(mReader, BlockType.CodersUnpackSize);
{
for(int i = 0; i < folders.Length; i++)
{
var folder = folders[i];
folder.UnpackSizes = new ulong[folder.GetNumOutStreams()];
for(int j = 0; j < folder.UnpackSizes.Length; j++)
folder.UnpackSizes[j] = mReader.ReadPackedUInt64();
}
}
for(; ; )
{
var type = ReadBlockType(mReader);
if(type == BlockType.End)
break;
if(type == BlockType.CRC)
{
BitVector defined;
uint[] crcs;
ReadHashDigests(mReader, folders.Length, out defined, out crcs);
for(int i = 0; i < folders.Length; i++)
if(defined[i])
folders[i].UnpackCRC = crcs[i];
continue;
}
SkipAttribute(mReader);
}
}
private void ReadPackInfo(DataReader mReader, out ulong[] packSizes, out BitVector packCRCsDefined, out uint[] packCRCs)
{
packCRCsDefined = null;
packCRCs = null;
ulong dataOffset = mReader.ReadPackedUInt64();
int numPackStreams = mReader.ReadPackedUInt31();
WaitAttribute(mReader, BlockType.Size);
{
packSizes = new ulong[numPackStreams];
for(int i = 0; i < numPackStreams; i++)
packSizes[i] = mReader.ReadPackedUInt64();
}
for(; ; )
{
var type = ReadBlockType(mReader);
if(type == BlockType.End)
break;
if(type == BlockType.CRC)
ReadHashDigests(mReader, numPackStreams, out packCRCsDefined, out packCRCs);
else
SkipAttribute(mReader);
}
if(packCRCsDefined == null)
{
packCRCsDefined = new BitVector(numPackStreams);
packCRCs = new uint[numPackStreams];
}
}
private void ReadSubStreamsInfo(DataReader mReader, FolderInfo[] folders, out int[] numUnpackStreamsInFolders, out List<ulong> unpackSizes, out BitVector crcDefined, out uint[] crcs)
{
numUnpackStreamsInFolders = new int[folders.Length];
for(int i = 0; i < numUnpackStreamsInFolders.Length; i++)
numUnpackStreamsInFolders[i] = 1;
BlockType? type;
for(; ; )
{
type = ReadBlockType(mReader);
if(type == BlockType.NumUnpackStream)
{
for(int i = 0; i < numUnpackStreamsInFolders.Length; i++)
numUnpackStreamsInFolders[i] = mReader.ReadPackedUInt31();
continue;
}
if(type == BlockType.End || type == BlockType.CRC || type == BlockType.Size)
break;
SkipAttribute(mReader);
}
for(int i = 0; i < numUnpackStreamsInFolders.Length; i++)
{
int numSubstreams = numUnpackStreamsInFolders[i];
if(numSubstreams == 0)
continue;
ulong sum = 0;
if(type == BlockType.Size)
{
for(int j = 1; j < numSubstreams; j++)
{
ulong size = mReader.ReadPackedUInt64();
unpackSizes.Add(size);
sum += size;
}
}
unpackSizes.Add(folders[i].GetUnpackSize() - sum);
}
if(type == BlockType.Size)
type = ReadBlockType(mReader);
int numCRCs = 0;
int numCRCsTotal = 0;
for(int i = 0; i < folders.Length; i++)
{
int numSubstreams = numUnpackStreamsInFolders[i];
if(numSubstreams != 1 || folders[i].UnpackCRC == null)
numCRCs += numSubstreams;
numCRCsTotal += numSubstreams;
}
for(; ; )
{
if(type == BlockType.CRC)
{
BitVector defined2;
uint[] crcs2;
ReadHashDigests(mReader, numCRCs, out defined2, out crcs2);
}
else if(type == BlockType.End)
break;
else
SkipAttribute(mReader);
type = ReadBlockType(mReader);
}
if(crcDefined == null)
{
throw new NotImplementedException();
}
}
private BlockType? ReadBlockType(DataReader mReader)
{
ulong value = mReader.ReadPackedUInt64();
if(value > 25)
return null;
else
return (BlockType)value;
}