Introduction - If you have any usage issues, please Google them yourself
You should not need to change anything beyond this point.
* The first part of the file implements linear algebra in GF.
* gf is the type used to store an element of the Galois Field.
* Must contain at least GF_BITS bits.
*
* Note: unsigned char will work up to GF(256) but int seems to run
* faster on the Pentium. We use int whenever have to deal with an
* index, since they are generally faster.