示例#1
0
        /// <summary>
        /// Initializes a new instance of the <see cref="SmallBlockTableWriter"/> class.
        /// </summary>
        /// <param name="bigBlockSize">the poifs bigBlockSize</param>
        /// <param name="documents">a IList of POIFSDocument instances</param>
        /// <param name="root">the Filesystem's root property</param>
        public SmallBlockTableWriter(POIFSBigBlockSize bigBlockSize, IList <object> documents,
                                     RootProperty root)
        {
            _sbat         = new BlockAllocationTableWriter(bigBlockSize);
            _small_blocks = new List <object>();
            _root         = root;
            IEnumerator iter = documents.GetEnumerator();

            while (iter.MoveNext())
            {
                POIFSDocument   doc    = ( POIFSDocument )iter.Current;
                BlockWritable[] blocks = doc.SmallBlocks;

                if (blocks.Length != 0)
                {
                    doc.StartBlock = _sbat.AllocateSpace(blocks.Length);
                    for (int j = 0; j < blocks.Length; j++)
                    {
                        _small_blocks.Add(blocks[j]);
                    }
                }
                else
                {
                    doc.StartBlock = POIFSConstants.END_OF_CHAIN;
                }
            }
            _sbat.SimpleCreateBlocks();
            _root.Size       = _small_blocks.Count;
            _big_block_count = SmallDocumentBlock.Fill(bigBlockSize, _small_blocks);
        }
示例#2
0
        /// <summary>
        /// convert a single long array into an array of SmallDocumentBlock
        /// instances
        /// </summary>
        /// <param name="bigBlockSize">the poifs bigBlockSize</param>
        /// <param name="array">the byte array to be converted</param>
        /// <param name="size">the intended size of the array (which may be smaller)</param>
        /// <returns>an array of SmallDocumentBlock instances, filled from
        /// the array</returns>
        public static SmallDocumentBlock [] Convert(POIFSBigBlockSize bigBlockSize,
                                                    byte [] array,
                                                    int size)
        {
            SmallDocumentBlock[] rval = new SmallDocumentBlock[(size + _block_size - 1) / _block_size];
            int offset = 0;

            for (int k = 0; k < rval.Length; k++)
            {
                rval[k] = new SmallDocumentBlock(bigBlockSize);
                if (offset < array.Length)
                {
                    int length = Math.Min(_block_size, array.Length - offset);

                    Array.Copy(array, offset, rval[k]._data, 0, length);
                    if (length != _block_size)
                    {
                        for (int i = length; i < _block_size; i++)
                        {
                            rval[k]._data[i] = _default_fill;
                        }
                    }
                }
                else
                {
                    for (int j = 0; j < rval[k]._data.Length; j++)
                    {
                        rval[k]._data[j] = _default_fill;
                    }
                }
                offset += _block_size;
            }
            return(rval);
        }
示例#3
0
        /// <summary>
        /// Makes the empty small document block.
        /// </summary>
        /// <returns></returns>
        private static SmallDocumentBlock MakeEmptySmallDocumentBlock(POIFSBigBlockSize bigBlockSize)
        {
            SmallDocumentBlock block = new SmallDocumentBlock(bigBlockSize);

            for (int i = 0; i < block._data.Length; i++)
            {
                block._data[i] = _default_fill;
            }
            return(block);
        }
示例#4
0
        /// <summary>
        /// fetch the small document block list from an existing file
        /// </summary>
        /// <param name="bigBlockSize">the poifs bigBlockSize</param>
        /// <param name="blockList">the raw data from which the small block table will be extracted</param>
        /// <param name="root">the root property (which contains the start block and small block table size)</param>
        /// <param name="sbatStart">the start block of the SBAT</param>
        /// <returns>the small document block list</returns>
        public static BlockList GetSmallDocumentBlocks(POIFSBigBlockSize bigBlockSize,
                                                       RawDataBlockList blockList, RootProperty root,
                                                       int sbatStart)
        {
            BlockList list =
                new SmallDocumentBlockList(
                    SmallDocumentBlock.Extract(bigBlockSize, blockList.FetchBlocks(root.StartBlock, -1)));

            new BlockAllocationTableReader(bigBlockSize, blockList.FetchBlocks(sbatStart, -1), list);
            return(list);
        }
示例#5
0
        /// <summary>
        /// Factory for creating SmallDocumentBlocks from DocumentBlocks
        /// </summary>
        /// <param name="bigBlocksSize"></param>
        /// <param name="store">the original DocumentBlocks</param>
        /// <param name="size">the total document size</param>
        /// <returns>an array of new SmallDocumentBlocks instances</returns>
        public static SmallDocumentBlock [] Convert(POIFSBigBlockSize bigBlocksSize,
                                                    BlockWritable [] store,
                                                    int size)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                for (int j = 0; j < store.Length; j++)
                {
                    store[j].WriteBlocks(stream);
                }
                byte[] data = stream.ToArray();
                SmallDocumentBlock[] rval = new SmallDocumentBlock[ConvertToBlockCount(size)];

                for (int index = 0; index < rval.Length; index++)
                {
                    rval[index] = new SmallDocumentBlock(bigBlocksSize, data, index);
                }
                return(rval);
            }
        }