| #include <tommath.h> |
| #ifdef BN_MP_CMP_MAG_C |
| /* LibTomMath, multiple-precision integer library -- Tom St Denis |
| * |
| * LibTomMath is a library that provides multiple-precision |
| * integer arithmetic as well as number theoretic functionality. |
| * |
| * The library was designed directly after the MPI library by |
| * Michael Fromberger but has been written from scratch with |
| * additional optimizations in place. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org |
| */ |
| |
| /* compare maginitude of two ints (unsigned) */ |
| int mp_cmp_mag (mp_int * a, mp_int * b) |
| { |
| int n; |
| mp_digit *tmpa, *tmpb; |
| |
| /* compare based on # of non-zero digits */ |
| if (a->used > b->used) { |
| return MP_GT; |
| } |
| |
| if (a->used < b->used) { |
| return MP_LT; |
| } |
| |
| /* alias for a */ |
| tmpa = a->dp + (a->used - 1); |
| |
| /* alias for b */ |
| tmpb = b->dp + (a->used - 1); |
| |
| /* compare based on digits */ |
| for (n = 0; n < a->used; ++n, --tmpa, --tmpb) { |
| if (*tmpa > *tmpb) { |
| return MP_GT; |
| } |
| |
| if (*tmpa < *tmpb) { |
| return MP_LT; |
| } |
| } |
| return MP_EQ; |
| } |
| #endif |