Ejemplo n.º 1
0
        public IndexNode(IndexNodeSaveFn store, int storeOverhead, Index index, bool isRoot, byte[] buffer, int offset)
        {
            _store               = store;
            _storageOverhead     = storeOverhead;
            _index               = index;
            _isRoot              = isRoot;
            _header              = new IndexHeader(buffer, offset + 0);
            _totalSpaceAvailable = _header.AllocatedSizeOfEntries;

            _entries = new List <IndexEntry>();
            int pos = (int)_header.OffsetToFirstEntry;

            while (pos < _header.TotalSizeOfEntries)
            {
                IndexEntry entry = new IndexEntry(index.IsFileIndex);
                entry.Read(buffer, offset + pos);
                _entries.Add(entry);

                if ((entry.Flags & IndexEntryFlags.End) != 0)
                {
                    break;
                }

                pos += entry.Size;
            }
        }
Ejemplo n.º 2
0
        private bool SelfCheckIndexNode(byte[] buffer, int offset, Bitmap bitmap, IndexRoot root, string fileName, string indexName)
        {
            bool ok = true;

            IndexHeader header = new IndexHeader(buffer, offset);

            IndexEntry lastEntry = null;

            IComparer <byte[]> collator = root.GetCollator(_context.UpperCase);

            int pos = (int)header.OffsetToFirstEntry;

            while (pos < header.TotalSizeOfEntries)
            {
                IndexEntry entry = new IndexEntry(indexName == "$I30");
                entry.Read(buffer, offset + pos);
                pos += entry.Size;

                if ((entry.Flags & IndexEntryFlags.Node) != 0)
                {
                    long bitmapIdx = entry.ChildrenVirtualCluster / Utilities.Ceil(root.IndexAllocationSize, _context.BiosParameterBlock.SectorsPerCluster * _context.BiosParameterBlock.BytesPerSector);
                    if (!bitmap.IsPresent(bitmapIdx))
                    {
                        ReportError("Index entry {0} is non-leaf, but child vcn {1} is not in bitmap at index {2}", Index.EntryAsString(entry, fileName, indexName), entry.ChildrenVirtualCluster, bitmapIdx);
                    }
                }

                if ((entry.Flags & IndexEntryFlags.End) != 0)
                {
                    if (pos != header.TotalSizeOfEntries)
                    {
                        ReportError("Found END index entry {0}, but not at end of node", Index.EntryAsString(entry, fileName, indexName));
                        ok = false;
                    }
                }

                if (lastEntry != null && collator.Compare(lastEntry.KeyBuffer, entry.KeyBuffer) >= 0)
                {
                    ReportError("Found entries out of order {0} was before {1}", Index.EntryAsString(lastEntry, fileName, indexName), Index.EntryAsString(entry, fileName, indexName));
                    ok = false;
                }

                lastEntry = entry;
            }

            return(ok);
        }
Ejemplo n.º 3
0
        public IndexNode(IndexNodeSaveFn store, int storeOverhead, Index index, bool isRoot, uint allocatedSize)
        {
            _store               = store;
            _storageOverhead     = storeOverhead;
            _index               = index;
            _isRoot              = isRoot;
            _header              = new IndexHeader(allocatedSize);
            _totalSpaceAvailable = allocatedSize;

            IndexEntry endEntry = new IndexEntry(_index.IsFileIndex);

            endEntry.Flags |= IndexEntryFlags.End;

            _entries = new List <IndexEntry>();
            _entries.Add(endEntry);

            _header.OffsetToFirstEntry = (uint)(IndexHeader.Size + storeOverhead);
            _header.TotalSizeOfEntries = (uint)(_header.OffsetToFirstEntry + endEntry.Size);
        }