view libtommath/bn_mp_cmp.c @ 1702:8f93f37c01de

Allow DH to be completely disabled (#97) Reduces binary size by ~2kB by default and by 21kB with no other libtommath functions users, ex. with curve25519 kex and ed25519 key only.
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Thu, 28 May 2020 20:01:48 +0500
parents 1051e4eea25a
children
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#include "tommath_private.h"
#ifdef BN_MP_CMP_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */

/* compare two ints (signed)*/
mp_ord mp_cmp(const mp_int *a, const mp_int *b)
{
   /* compare based on sign */
   if (a->sign != b->sign) {
      if (a->sign == MP_NEG) {
         return MP_LT;
      } else {
         return MP_GT;
      }
   }

   /* compare digits */
   if (a->sign == MP_NEG) {
      /* if negative compare opposite direction */
      return mp_cmp_mag(b, a);
   } else {
      return mp_cmp_mag(a, b);
   }
}
#endif