public void GetMeta(META id, ref uint meta)
{
BtShared bt = Bt;
Enter();
Debug.Assert(InTrans > TRANS.NONE);
Debug.Assert(querySharedCacheTableLock(this, MASTER_ROOT, LOCK.READ) == RC.OK);
Debug.Assert(bt.Page1 != null);
Debug.Assert(id >= 0 && (int)id <= 15);
meta = ConvertEx.Get4(bt.Page1.Data, 36 + (int)id * 4);
// If auto-vacuum is disabled in this build and this is an auto-vacuum database, mark the database as read-only.
#if OMIT_AUTOVACUUM
if (idx == META.LARGEST_ROOT_PAGE && meta > 0)
bt.BtsFlags |= BTS.READ_ONLY;
#endif
Leave();
}
public RC UpdateMeta(META id, uint meta)
{
BtShared bt = Bt;
Debug.Assert((int)id >= 1 && (int)id <= 15);
Enter();
Debug.Assert(InTrans == TRANS.WRITE);
Debug.Assert(bt.Page1 != null);
byte[] p1 = bt.Page1.Data;
var rc = Pager.Write(bt.Page1.DBPage);
if (rc == RC.OK)
{
ConvertEx.Put4(p1, 36 + (int)id * 4, meta);
#if !OMIT_AUTOVACUUM
if (id == META.INCR_VACUUM)
{
Debug.Assert(bt.AutoVacuum || meta == 0);
Debug.Assert(meta == 0 || meta == 1);
bt.IncrVacuum = (meta != 0);
}
#endif
}
Leave();
return rc;
}
protected override void ReadFile(byte[] contents)
{
using (MemoryStream file = new MemoryStream(contents))
using (BinaryRobloxFileReader reader = new BinaryRobloxFileReader(this, file))
{
// Verify the signature of the file.
byte[] binSignature = reader.ReadBytes(14);
string signature = Encoding.UTF7.GetString(binSignature);
if (signature != MagicHeader)
{
throw new InvalidDataException("Provided file's signature does not match BinaryRobloxFile.MagicHeader!");
}
// Read header data.
Version = reader.ReadUInt16();
NumClasses = reader.ReadUInt32();
NumInstances = reader.ReadUInt32();
Reserved = reader.ReadInt64();
// Begin reading the file chunks.
bool reading = true;
Classes = new INST[NumClasses];
Instances = new Instance[NumInstances];
while (reading)
{
try
{
var chunk = new BinaryRobloxFileChunk(reader);
IBinaryFileChunk handler = null;
switch (chunk.ChunkType)
{
case "INST":
handler = new INST();
break;
case "PROP":
handler = new PROP();
break;
case "PRNT":
handler = new PRNT();
break;
case "META":
handler = new META();
break;
case "SSTR":
handler = new SSTR();
break;
case "SIGN":
handler = new SIGN();
break;
case "END\0":
ChunksImpl.Add(chunk);
reading = false;
break;
case string unhandled:
Console.Error.WriteLine("BinaryRobloxFile - Unhandled chunk-type: {0}!", unhandled);
break;
default: break;
}
if (handler != null)
{
using (var readBuffer = new MemoryStream(chunk.Data))
{
using (var dataReader = new BinaryRobloxFileReader(this, readBuffer))
{
chunk.Handler = handler;
handler.Load(dataReader);
}
}
ChunksImpl.Add(chunk);
}
}
catch (EndOfStreamException)
{
throw new Exception("Unexpected end of file!");
}
}
}
}
