question: int appendSlot ( int w0 , int w1 , int w2 , int w3 ) { { final int slotsize = 4 ; int newoffset = ( lastUsed + 1 ) * slotsize ; int chunkpos = newoffset > > lowbits ; int slotpos = ( newoffset & lowmask ) ; if ( chunkpos > chunks . size ( ) - 1 ) chunks . addElement ( new int [ chunkalloc ] ) ; int [ ] chunk = chunks . elementAt ( chunkpos ) ; chunk [ slotpos ] = w0 ; chunk [ slotpos + 1 ] = w1 ; chunk [ slotpos + 2 ] = w2 ; chunk [ slotpos + 3 ] = w3 ; return ++ lastUsed ; } }
target:  Append a 4-integer record to the CIA, starting with record 1. (Since arrays are initialized to all-0, 0 has been reserved as the "unknown" value in DTM.)