release/src/router/dropbear/libtommath/bn_mp_cmp.c

   1 #include <tommath.h>
   2 #ifdef BN_MP_CMP_C
   3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
   4  *
   5  * LibTomMath is a library that provides multiple-precision
   6  * integer arithmetic as well as number theoretic functionality.
   7  *
   8  * The library was designed directly after the MPI library by
   9  * Michael Fromberger but has been written from scratch with
  10  * additional optimizations in place.
  11  *
  12  * The library is free for all purposes without any express
  13  * guarantee it works.
  14  *
  15  * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
  16  */
  17
  18 /* compare two ints (signed)*/
  19 int
  20 mp_cmp (mp_int * a, mp_int * b)
  21 {
  22   /* compare based on sign */
  23   if (a->sign != b->sign) {
  24      if (a->sign == MP_NEG) {
  25         return MP_LT;
  26      } else {
  27         return MP_GT;
  28      }
  29   }
  30
  31   /* compare digits */
  32   if (a->sign == MP_NEG) {
  33      /* if negative compare opposite direction */
  34      return mp_cmp_mag(b, a);
  35   } else {
  36      return mp_cmp_mag(a, b);
  37   }
  38 }
  39 #endif
  40
  41 /* $Source: /cvs/libtom/libtommath/bn_mp_cmp.c,v $ */
  42 /* $Revision: 1.3 $ */
  43 /* $Date: 2006/03/31 14:18:44 $ */