you are right,in text he is talking about a "p" which is pointing to data, I havn't noticed it, sorry.

I got very confused first , still I cant see any P in this artical http://www.repairfaq.org/filipg/LI...c_v33.html

is the snippet mistyped there?

In C, the algorithm main loop looks like this:

   r=0;
   while (len--)
     {
      byte t = (r >> 24) & 0xFF;
      r = (r << 8) | *++;
      r^=table[t];
     }

where len is the length of the augmented message in bytes, p points to the augmented message, r is the register, t is a temporary, and table is the computed table. This code can be made even more unreadable as follows:

   r=0;
   while (len--)
          r = ((r << 8) | *++) ^ t[(r >> 24) & 0xFF];