nl_tokens: Sets a range of characters to 1s in the masks .
pl_tokens: ASCIIBits set ( int <mask> , int max ) { // There are faster bit-twiddling tricks to accomplish the same // thing as below.  Minor optimization for later. int i = min ; for ( int n = Math . min ( max , 63 ) ; i <= n ; ++ i ) { _lowerMask |= ( 1L << i ) ; } for ( ; i <= max ; ++ i ) { _upperMask |= ( 1L << i ) ; } return this ; }