private void VerifyHeader()
{
var buffer = new byte[UnicodeHeaderLength];
ReadBytes(buffer, 0, 28);
Validate.Match(buffer.Segment(0, 4), MagicBytes, "Magic value invalid.");
Validate.Match(buffer.Segment(8, 2), MagicClientBytes, "Magic client value invalid.");
_fileVersion = BitConverter.ToUInt16(buffer, 10);
Validate.Any(_fileVersion, SupportedVersions, "Found unsupported version.");
ReadBytes(buffer, 28, (IsAnsi ? AnsiHeaderLength : UnicodeHeaderLength) - 28);
var crcPartial = BitConverter.ToUInt32(buffer, 4);
Validate.Match(crcPartial, Crc32.Calculate(buffer.Segment(8, 471)), "Partial CRC invalid.");
var nbt = new Bref(
BitConverter.ToUInt64(buffer, RootOffset + 36),
BitConverter.ToUInt64(buffer, RootOffset + 44));
var bbt = new Bref(
BitConverter.ToUInt64(buffer, RootOffset + 52),
BitConverter.ToUInt64(buffer, RootOffset + 60));
_nbtReader = new BTreeReader <NbtEntry>(Stream, (long)nbt.Ib, seg => new NbtEntry(seg));
_bbtReader = new BTreeReader <BbtEntry>(Stream, (long)bbt.Ib, seg => new BbtEntry(seg));
_cryptMethod = (CryptMethod)buffer[CryptMethodOffset];
}
public BbtEntry(Bref bref, ushort length, ushort refCount)
{
Bref = bref;
Length = length;
RefCount = refCount;
}
public BbtEntry(Segment <byte> data)
{
Bref = new Bref(data.ToUInt64(0), data.ToUInt64(8));
Length = data.ToUInt16(16);
RefCount = data.ToUInt16(18);
}
