/// <summary>
/// HashDB manager
/// MUST BE A POWER OF 2
/// </summary>
/// <param name="minBlockSize">POWER of 2</param>
/// <param name="DB">Primary DB</param>
/// <param name="relocFolder">Relocation data</param>
/// <param name="Size">POWER OF 2!</param>
public HashDB(int minBlockSize, string DB, string relocFolder, long Size = 0)
{
HashDBFile = DB;
HashDBBitMap = DB + ".bin";
if (Size != 0)
{
DBSize = (long)FractHashTree.RoundUpPow2(Size);
}
if (!File.Exists(HashDBFile))
{
if (!FractHashTree.IsPow2(DBSize))
{
throw new InternalBufferOverflowException($"DB SIZE not a power of 2!");
}
using (var fileStream = new FileStream(HashDBFile, FileMode.Create, FileAccess.Write, FileShare.None))
fileStream.SetLength(DBSize + (DB_READ_SIZE));
}
else
{
DBSize = (long)FractHashTree.RoundDownPow2(new FileInfo(HashDBFile).Length);
}
// Divide by HASH size
DBEntries = (ulong)DBSize >> HASH_SHIFT;
DBEntriesMask = (ulong)DBEntries - 1;
MinBlockSize = minBlockSize;
ReRe = new ReReDB(relocFolder);
HDBBitMap = new UnsafeHelp(HashDBBitMap, (long)DBEntries);
}
public MetaDB(string WorkingDir, int minHashSize = 256, long DBSize = 0, int loadBufferCount = 50000000, string NewInfoString = null)
{
RootFolder = WorkingDir;
if (!Directory.Exists(RootFolder))
{
Directory.CreateDirectory(RootFolder);
}
MDBName = Path.Combine(RootFolder, mdbName);
HDBName = Path.Combine(RootFolder, hdbName);
BDBName = Path.Combine(RootFolder, bdbName);
RelocName = Path.Combine(RootFolder, relocFolder);
LoadBufferCount = loadBufferCount;
if (File.Exists(MDBName))
{
xDoc = XDocument.Load(MDBName);
}
else
{
xDoc = new XDocument(new XDeclaration("1.0", Encoding.Default.WebName, "yes"), new XElement(ElementNames.xRoot));
}
mData = xDoc.Root;
var currID = ((Int32?)mData.Attribute(AttributeNames.xNextHashID) ?? 0);
if (currID == 0)
{
mData.SetAttributeValue(AttributeNames.xNextHashID, 1);
currHID = 1;
}
else
{
currHID = currID;
}
if (mData.Element(ElementNames.xRecords) != null)
{
mRecords = mData.Element(ElementNames.xRecords);
}
else
{
mRecords = new XElement(ElementNames.xRecords);
mData.Add(mRecords);
}
if (mData.Element(ElementNames.xMetaInfoStrings) != null)
{
infoStrings = mData.Element(ElementNames.xMetaInfoStrings);
}
else
{
infoStrings = new XElement(ElementNames.xMetaInfoStrings);
mData.Add(infoStrings);
}
infoString = NewInfoString;
MinHashSize = minHashSize;
ReRe = new ReReDB(RelocName);
HDB = new HashDB(MinHashSize, HDBName, RelocName, DBSize);
HDB.ReRe = ReRe;
Loader = new FileLoader(this, LoadBufferCount, infoString);
cLoader = new CloudLoader(Loader, MinHashSize, RelocName);
cLoader.InfoString = infoString;
ReRe.AzureCnx = cLoader;
}
