public static ContentDatabaseSession OpenDatabase(string path)
{
//Open file
DatabaseFile file = DatabaseFile.LoadFile(path);
//Open DB
var db = new ContentDatabaseSession(file);
//Read TOC
if (db.tocPage != -1)
{
//Read blob
byte[] tocBytes = file.ReadBlob(db.tocPage);
int count = tocBytes.Length / TOC_ENTRY_LENGTH;
BufferBinaryTool reader = new BufferBinaryTool(tocBytes);
//Add all
for (int i = 0; i < count; i++)
{
int offset = TOC_ENTRY_LENGTH * i;
DatabaseObjectHeader entry = new DatabaseObjectHeader();
entry.object_id = reader.ReadUInt64(offset + 0);
entry.page_id = reader.ReadUInt64(offset + 8);
entry.commit_id = reader.ReadUInt64(offset + 16);
entry.group_id = reader.ReadInt32(offset + 24);
entry.commit_type = tocBytes[offset + 28];
entry.flags = tocBytes[offset + 29];
entry.reserved = reader.ReadUInt16(offset + 30);
db.objects.Add(entry);
}
}
//Read Name Table
if (db.nameTablePage != -1)
{
//Read blob
byte[] ntBytes = file.ReadBlob(db.nameTablePage);
BufferBinaryTool reader = new BufferBinaryTool(ntBytes);
//Begin reading
int index = 0;
while (index < ntBytes.Length)
{
//Read length
int length = reader.ReadInt32(index);
//Read string
db.nameTable.Add(Encoding.ASCII.GetString(ntBytes, index + 4, length));
//Update
index += length + 4;
}
}
return(db);
}
/// <summary>
/// Finds blobs matching the expression. This method is fast, but you need to deserialize it elsewhere. Run this from the worker thread.
/// </summary>
/// <param name="expression"></param>
/// <param name="skip"></param>
/// <param name="limit"></param>
/// <returns></returns>
private FindCommitResults Find(Expression <Func <DatabaseObjectHeader, bool> > expression, int skip = 0, int limit = int.MaxValue)
{
//Compile
var expressionCompiled = expression.Compile();
//Search for objects matching
List <DatabaseObjectHeader> matchingHeaders = new List <DatabaseObjectHeader>();
int found = 0;
for (int i = 0; i < objects.Count; i++)
{
//Check
if (expressionCompiled(objects[i]))
{
//Count. This might have to go before the check
found++;
//Check if we should add
if (found > skip)
{
matchingHeaders.Add(objects[i]);
}
//Check if we've hit the limit
if (matchingHeaders.Count == limit)
{
break;
}
}
}
//Load all
FindCommitResults pack = new FindCommitResults();
foreach (var h in matchingHeaders)
{
//Load blob
byte[] blob = file.ReadBlob((long)h.page_id);
//Pack
FindCommitResultsObject obj = new FindCommitResultsObject
{
blob = blob,
commit_id = h.commit_id,
commit_type = h.commit_type,
group_id = h.group_id,
object_id = h.object_id,
nameTable = this
};
pack.results.Add(obj);
}
return(pack);
}
