/// XXX Patch 

        // The read() of java.io.InputStream does not guarantee to provide

        // the full amount of requested bytes. It is necessary to repeat the reading

        // until the full block is read or eof occured. 

        // The original source worked fine up to the point of reading Excel-files 

        // contained in a ZIP-file.

        while (byte_count!=-1 && byte_count < POIFSConstants.BIG_BLOCK_SIZE) {

        	int k = stream.read(_data, byte_count, POIFSConstants.BIG_BLOCK_SIZE-byte_count);

        	if (k==-1) {

        		break;

        	} else {

        		byte_count += k;

        	}

        }

        /// XXX Patch