Exemplo n.º 1
0
        public void Write(int index, byte[] data)
        {
            if (mSector.Type != SECTOR.SectorType.FILE_NODE)
            {
                throw new Exception("Cannot write data to node type " + mSector.Type.ToString());
            }

            //load blocks
            LoadBlocks();


            // extend file with more sectors if needed
            FILE_NODE fileSector     = mSector as FILE_NODE;
            int       fileFileLength = Math.Max(fileSector.FileSize, index + data.Length);

            VirtualBlock.ExtendBlocks(mDrive, mBlocks, fileSector.FileSize, fileFileLength);

            //write data to the blocks
            VirtualBlock.WriteBlockData(mDrive, mBlocks, index, data);

            //wrte out data
            CommitBlocks();

            // write out new file size to disk
            if (fileFileLength != fileSector.FileSize)
            {
                fileSector.FileSize = fileFileLength;
                Drive.Disk.WriteSector(mNodeSector, fileSector.RawBytes);
            }
        }
Exemplo n.º 2
0
        public byte[] Read(int index, int length)
        {
            if (mSector.Type != SECTOR.SectorType.FILE_NODE)
            {
                throw new Exception("Cannot read data to node type " + mSector.Type.ToString());
            }

            LoadBlocks();
            return(VirtualBlock.ReadBlockData(mDrive, mBlocks, index, length));
        }