public Index(File file, string name, BiosParameterBlock bpb, UpperCase upCase)
{
_file = file;
_name = name;
_bpb = bpb;
_isFileIndex = name == "$I30";
_blockCache = new ObjectCache <long, IndexBlock>();
_root = _file.GetStream(AttributeType.IndexRoot, _name).GetContent <IndexRoot>();
_comparer = _root.GetCollator(upCase);
using (Stream s = _file.OpenStream(AttributeType.IndexRoot, _name, FileAccess.Read))
{
byte[] buffer = Utilities.ReadFully(s, (int)s.Length);
_rootNode = new IndexNode(WriteRootNodeToDisk, 0, this, true, buffer, IndexRoot.HeaderOffset);
// Give the attribute some room to breathe, so long as it doesn't squeeze others out
// BROKEN, BROKEN, BROKEN - how to figure this out? Query at the point of adding entries to the root node?
_rootNode.TotalSpaceAvailable += _file.MftRecordFreeSpace(AttributeType.IndexRoot, _name) - 100;
}
if (_file.StreamExists(AttributeType.IndexAllocation, _name))
{
_indexStream = _file.OpenStream(AttributeType.IndexAllocation, _name, FileAccess.ReadWrite);
}
if (_file.StreamExists(AttributeType.Bitmap, _name))
{
_indexBitmap = new Bitmap(_file.OpenStream(AttributeType.Bitmap, _name, FileAccess.ReadWrite), long.MaxValue);
}
}
public IComparer <byte[]> GetCollator(UpperCase upCase)
{
switch (_collationRule)
{
case AttributeCollationRule.Filename:
return(new FileNameComparer(upCase));
case AttributeCollationRule.SecurityHash:
return(new SecurityHashComparer());
case AttributeCollationRule.UnsignedLong:
return(new UnsignedLongComparer());
case AttributeCollationRule.MultipleUnsignedLongs:
return(new MultipleUnsignedLongComparer());
case AttributeCollationRule.Sid:
return(new SidComparer());
default:
throw new NotImplementedException();
}
}
public FileNameComparer(UpperCase upCase)
{
_stringComparer = upCase;
}
public FileNameQuery(string query, UpperCase upperCase)
{
_query = Encoding.Unicode.GetBytes(query);
_upperCase = upperCase;
}
