// there is nothing to dispose
//public void Dispose()
//{
// Dispose(true);
// GC.SuppressFinalize(this);
//}
//protected virtual void Dispose(bool disposing)
//{
// if (disposing)
// {
// }
//}
/// <summary>
/// Initializes a new instance of the <see cref="POIFSFileSystem"/> class. intended for writing
/// </summary>
public POIFSFileSystem()
{
HeaderBlock headerBlock = new HeaderBlock(bigBlockSize);
_property_table = new PropertyTable(headerBlock);
_documents = new ArrayList();
_root = null;
}
/// <summary>
/// Read from an InputStream and Process the documents we Get
/// </summary>
/// <param name="stream">the InputStream from which to Read the data</param>
/// <returns>POIFSDocument list</returns>
public List<DocumentDescriptor> Read(Stream stream)
{
registryClosed = true;
// Read the header block from the stream
HeaderBlock header_block = new HeaderBlock(stream);
// Read the rest of the stream into blocks
RawDataBlockList data_blocks = new RawDataBlockList(stream, header_block.BigBlockSize);
// Set up the block allocation table (necessary for the
// data_blocks to be manageable
new BlockAllocationTableReader(header_block.BigBlockSize,
header_block.BATCount,
header_block.BATArray,
header_block.XBATCount,
header_block.XBATIndex,
data_blocks);
// Get property table from the document
PropertyTable properties = new PropertyTable(header_block, data_blocks);
// Process documents
return ProcessProperties(SmallBlockTableReader.GetSmallDocumentBlocks
(header_block.BigBlockSize, data_blocks,
properties.Root,
header_block.SBATStart),
data_blocks, properties.Root.Children, new POIFSDocumentPath()
);
}
/// <summary>
/// Create a POIFSFileSystem from an Stream. Normally the stream is Read until
/// EOF. The stream is always Closed. In the unlikely case that the caller has such a stream and
/// needs to use it after this constructor completes, a work around is to wrap the
/// stream in order to trap the Close() call.
/// </summary>
/// <param name="stream">the Streamfrom which to Read the data</param>
public POIFSFileSystem(Stream stream)
: this()
{
bool success = false;
HeaderBlock header_block_reader;
RawDataBlockList data_blocks;
try
{
// Read the header block from the stream
header_block_reader = new HeaderBlock(stream);
bigBlockSize = header_block_reader.BigBlockSize;
// Read the rest of the stream into blocks
data_blocks = new RawDataBlockList(stream, bigBlockSize);
success = true;
}
finally
{
CloseInputStream(stream, success);
}
// Set up the block allocation table (necessary for the
// data_blocks to be manageable
new BlockAllocationTableReader(header_block_reader.BigBlockSize,
header_block_reader.BATCount,
header_block_reader.BATArray,
header_block_reader.XBATCount,
header_block_reader.XBATIndex,
data_blocks);
// Get property table from the document
PropertyTable properties = new PropertyTable(header_block_reader, data_blocks);
// init documents
ProcessProperties(SmallBlockTableReader.GetSmallDocumentBlocks(bigBlockSize, data_blocks, properties.Root, header_block_reader.SBATStart),
data_blocks, properties.Root.Children, null, header_block_reader.PropertyStart);
// For whatever reason CLSID of root is always 0.
Root.StorageClsid = (properties.Root.StorageClsid);
}
