question: public void addData ( byte [ ] buf , int off , int len ) { if ( ( skipped + available + len ) > databuf . length ) { int desiredSize = ByteQueue . nextTwoPow ( available + len ) ; if ( desiredSize > databuf . length ) { byte [ ] tmp = new byte [ desiredSize ] ; System . arraycopy ( databuf , skipped , tmp , 0 , available ) ; databuf = tmp ; } else { System . arraycopy ( databuf , skipped , databuf , 0 , available ) ; } skipped = 0 ; } System . arraycopy ( buf , off , databuf , skipped + available , len ) ; available += len ; }
target:  Add some data to our buffer.