question: public static long generate ( long crc , String value ) { if ( value == null ) { return crc ; } int len = value . length ( ) ; for ( int i = 0 ; i < len ; i ++ ) { char ch = value . charAt ( i ) ; if ( ch > 0xff ) { crc = next ( crc , ( ch > > 8 ) ) ; } crc = next ( crc , ch ) ; } return crc ; }
target:  Calculates CRC from a string.