init_rs_non_canonical — Find a matching or allocate a new rs control
struct rs_control * init_rs_non_canonical
(int symsize, int (*gffunc)
(int), int fcr, int prim, int nroots);
the symbol size (number of bits)
pointer to function to generate the next field element, or the multiplicative identity element if given 0. Used instead of gfpoly if gfpoly is 0
the first consecutive root of the rs code generator polynomial in index form
primitive element to generate polynomial roots
RS code generator polynomial degree (number of roots)
structure, for fields with non-canonical representation