pb_cmp.c

   1 /* LibTomPoly, Polynomial Basis Math -- Tom St Denis
   2  *
   3  * LibTomPoly is a public domain library that provides
   4  * polynomial basis arithmetic support.  It relies on
   5  * LibTomMath for large integer support.
   6  *
   7  * This library is free for all purposes without any
   8  * express guarantee that it works.
   9  *
  10  * Tom St Denis, tomstdenis@iahu.ca, http://poly.libtomcrypt.org
  11  */
  12 #include <tompoly.h>
  13
  14 int pb_cmp(pb_poly *a, pb_poly *b)
  15 {
  16    int x;
  17
  18    if (a->used > b->used) {
  19       return PB_DEG_GT;
  20    } else if (a->used < b->used) {
  21       return PB_DEG_LT;
  22    }
  23
  24    for (x = 0; x < a->used; x++) {
  25        if (mp_cmp(&(a->terms[x]), &(b->terms[x])) != MP_EQ) {
  26           return PB_DEG_EQ;
  27        }
  28    }
  29    return PB_EQ;
  30 }
  31
  32