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

   1 #include <tommath.h>
   2 #ifdef BN_MP_ABS_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 /* b = |a|
  19  *
  20  * Simple function copies the input and fixes the sign to positive
  21  */
  22 int
  23 mp_abs (mp_int * a, mp_int * b)
  24 {
  25   int     res;
  26
  27   /* copy a to b */
  28   if (a != b) {
  29      if ((res = mp_copy (a, b)) != MP_OKAY) {
  30        return res;
  31      }
  32   }
  33
  34   /* force the sign of b to positive */
  35   b->sign = MP_ZPOS;
  36
  37   return MP_OKAY;
  38 }
  39 #endif
  40
  41 /* $Source: /cvs/libtom/libtommath/bn_mp_abs.c,v $ */
  42 /* $Revision: 1.3 $ */
  43 /* $Date: 2006/03/31 14:18:44 $ */