byte[] _Read(uint count)
{
byte[] data = Reader.ReadBytes((int)count);
for (int i = 0; i < data.Length; i++)
{
Key = CryptedDtbStream.XorKey(Key);
data[i] ^= (byte)Key;
}
Offset += (uint)data.Length;
return(data);
}
void _Write(byte[] buffer, uint offset, uint count)
{
byte[] buf = new byte[count];
for (int i = 0; i < count; i++)
{
Key = CryptedDtbStream.XorKey(Key);
buf[i] = (byte)(buffer[i + offset] ^ Key);
}
Stream.Write(buf, 0, (int)count);
Offset += count;
}
public ChunkedDtbStream(EndianReader reader)
{
Mode = ChunkedMode.Chunk;
Stream = reader.Base;
Reader = reader;
uint i, j;
Stream.Position = 4;
Key = Reader.ReadInt32();
ChunkMap = new int[Chunks + 1];
Seeds = new int[SeedIndexCount];
ChunkMap[0] = -8;
for (i = 1; i <= Chunks; i++)
{
int pos;
Stream.Position = (i - 1) * ChunkSize;
byte[] buffer = Reader.ReadBytes(ChunkSize);
for (pos = ChunkSize; pos > 0; pos--)
{
if (buffer[pos - 1] != 0)
{
break;
}
}
ChunkMap[i] = ChunkMap[i - 1] + pos;
}
length = (uint)ChunkMap[ChunkMap.Length - 1];
//Length = ChunkMap[(sizeof(ChunkMap)/sizeof(ChunkMap[0]))-1];
// calculate seeds for faster seeking
for (i = 0; i < length; i += SeedLength)
{
Seeds[i / SeedLength] = Key;
for (j = 0; j < SeedLength; j++)
{
Key = CryptedDtbStream.XorKey(Key);
}
}
Offset = 0;
Key = Seeds[0];
Stream.Position = 8;
}
