/** * Repositions this stream to the position at the time the mark() method was * last called on this input stream. If mark() has not been called this * method repositions the stream to its beginning. */ public override void Reset() { // Special case for Reset to the start if (_marked_offset == 0 && _marked_offset_count == 0) { _current_block_count = _marked_offset_count; _current_offset = _marked_offset; _data = _document.GetBlockIterator(); _buffer = null; return; } // Start again, then wind on to the required block _data = _document.GetBlockIterator(); _current_offset = 0; for (int i = 0; i < _marked_offset_count; i++) { _data.MoveNext(); _buffer = _data.Current; _current_offset += _buffer.Remain; } _current_block_count = _marked_offset_count; // Do we need to position within it? if (_current_offset != _marked_offset) { // Grab the right block _data.MoveNext(); _buffer = _data.Current; _current_block_count++; // Skip to the right place in it // (It should be positioned already at the start of the block, // we need to Move further inside the block) int skipBy = _marked_offset - _current_offset; _buffer.Position = (_buffer.Position + skipBy); } // All done _current_offset = _marked_offset; }
/** * Create an InputStream from the specified Document * * @param document the Document to be read */ public NDocumentInputStream(NPOIFSDocument document) { _current_offset = 0; _current_block_count = 0; _marked_offset = 0; _marked_offset_count = 0; _document_size = document.Size; _closed = false; _document = document; _data = _document.GetBlockIterator(); }
/** * Create an InputStream from the specified DocumentEntry * * @param document the DocumentEntry to be read * * @exception IOException if the DocumentEntry cannot be opened (like, maybe it has * been deleted?) */ public NDocumentInputStream(DocumentEntry document) { if (!(document is DocumentNode)) { throw new IOException("Cannot open internal document storage, " + document + " not a Document Node"); } _current_offset = 0; _current_block_count = 0; _marked_offset = 0; _marked_offset_count = 0; _document_size = document.Size; _closed = false; DocumentNode doc = (DocumentNode)document; DocumentProperty property = (DocumentProperty)doc.Property; _document = new NPOIFSDocument( property, ((DirectoryNode)doc.Parent).NFileSystem ); _data = _document.GetBlockIterator(); }
/** * Create an InputStream from the specified Document * * @param document the Document to be read */ public NDocumentInputStream(NPOIFSDocument document) { _current_offset = 0; _current_block_count = 0; _marked_offset = 0; _marked_offset_count = 0; _document_size = document.Size; _closed = false; _document = document; _data = _document.GetBlockIterator(); }
/** * Create an InputStream from the specified DocumentEntry * * @param document the DocumentEntry to be read * * @exception IOException if the DocumentEntry cannot be opened (like, maybe it has * been deleted?) */ public NDocumentInputStream(DocumentEntry document) { if (!(document is DocumentNode)) { throw new IOException("Cannot open internal document storage, " + document + " not a Document Node"); } _current_offset = 0; _current_block_count = 0; _marked_offset = 0; _marked_offset_count = 0; _document_size = document.Size; _closed = false; DocumentNode doc = (DocumentNode)document; DocumentProperty property = (DocumentProperty)doc.Property; _document = new NPOIFSDocument( property, ((DirectoryNode)doc.Parent).NFileSystem ); _data = _document.GetBlockIterator(); }