public HFSFile(BinaryReader reader, bool slim = false)
{
if (reader.ReadInt32() != HFHeader)
{
throw new HFSException(HFSError.HFSFileMismatch);
}
ExtractVersion = reader.ReadInt16();
BitFlag = reader.ReadInt16();
Contract.Assert(BitFlag == 0, "BitFlag == 0");
CompressionMethod = (HFSCompressionMethod)reader.ReadInt16();
Contract.Assert(CompressionMethod == HFSCompressionMethod.Store, "CompressionMethod == Store");
ModFileTime = reader.ReadInt16();
ModFileDate = reader.ReadInt16();
int position;
if (!slim)
{
Checksum = reader.ReadInt32();
CompressedSize = reader.ReadInt32();
DecompressedSize = reader.ReadInt32();
var filenameLength = reader.ReadInt16();
var extraLength = reader.ReadInt16();
position = (int)reader.BaseStream.Position;
Filename = HFS.XorStringWithKey(reader.ReadBytes(filenameLength), HFSXorTruths.KeyTable, position);
position = (int)reader.BaseStream.Position;
Extra = HFS.XorStringWithKey(reader.ReadBytes(extraLength), HFSXorTruths.KeyTable, position);
}
else
{
CompressedSize = DecompressedSize = (int)(reader.BaseStream.Length - reader.BaseStream.Position);
Filename = "unknown.bin";
}
position = (int)reader.BaseStream.Position;
Data = HFS.XorBlockWithKey(reader.ReadBytes(CompressedSize), HFSXorTruths.KeyTable, position);
if (Filename.EndsWith(".comp"))
{
using (var ms = new MemoryStream(Data))
using (var msReader = new BinaryReader(ms))
{
ms.Position = 0;
var compressionHeader = msReader.ReadInt32();
var compressionSize = msReader.ReadInt32();
if (compressionHeader == CompHeader)
{
ms.Position += 2;
DecompressedSize = compressionSize;
Filename = Path.GetFileNameWithoutExtension(Filename);
using (var zip = new DeflateStream(ms, CompressionMode.Decompress))
{
Data = new byte[compressionSize];
zip.Read(Data, 0, compressionSize);
}
}
}
}
}
public HFSIndex(BinaryReader reader)
{
if (reader.ReadInt32() != HFIndexHeader)
{
throw new HFSException(HFSError.HFSIndexMismatch);
}
IndexNumber = reader.ReadInt16();
PartitionNumber = reader.ReadInt16();
Contract.Assert(IndexNumber == PartitionNumber, "IndexNumber == DirectoryIndex");
DirectoryCount = reader.ReadInt16();
DirectoryPartition = reader.ReadInt16();
Contract.Assert(DirectoryCount == DirectoryPartition, "DirectoryCount == DirectoryNumber");
DirectoryBlockSize = reader.ReadInt32();
DirectoryOffset = reader.ReadInt32();
var length = reader.ReadInt16();
var position = (int)reader.BaseStream.Position;
Comment = HFS.XorStringWithKey(reader.ReadBytes(length), HFSXorTruths.KeyTable, position);
}
public HFSDirectory(BinaryReader reader)
{
if (reader.ReadInt32() != HFSFile.HFHeader)
{
throw new HFSException(HFSError.HFSDirectoryMismatch);
}
Version = reader.ReadInt16();
ExtractVersion = reader.ReadInt16();
BitFlag = reader.ReadInt16();
CompressionMethod = (HFSCompressionMethod)reader.ReadInt16();
Contract.Assert(CompressionMethod == HFSCompressionMethod.Store, "CompressionMethod == Store");
ModFileTime = reader.ReadInt16();
ModFileDate = reader.ReadInt16();
Checksum = reader.ReadInt32();
CompressedSize = reader.ReadInt32();
DecompressedSize = reader.ReadInt32();
var filenameLength = reader.ReadInt16();
var extraLength = reader.ReadInt16();
var commentLength = reader.ReadInt16();
PartitionNumber = reader.ReadInt16();
InternalAttributes = reader.ReadInt16();
Attributes = reader.ReadInt32();
DataOffset = reader.ReadInt32();
var position = (int)reader.BaseStream.Position;
Filename = HFS.XorStringWithKey(reader.ReadBytes(filenameLength), HFSXorTruths.KeyTable, position);
position = (int)reader.BaseStream.Position;
Extra = HFS.XorStringWithKey(reader.ReadBytes(extraLength), HFSXorTruths.KeyTable, position);
position = (int)reader.BaseStream.Position;
Comment = HFS.XorStringWithKey(reader.ReadBytes(commentLength), HFSXorTruths.KeyTable, position);
position = (int)reader.BaseStream.Position;
reader.BaseStream.Position = DataOffset;
File = new HFSFile(reader);
reader.BaseStream.Position = position;
}