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

   1 #include <tommath.h>
   2 #ifdef BN_MP_TO_SIGNED_BIN_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 /* store in signed [big endian] format */
  19 int mp_to_signed_bin (mp_int * a, unsigned char *b)
  20 {
  21   int     res;
  22
  23   if ((res = mp_to_unsigned_bin (a, b + 1)) != MP_OKAY) {
  24     return res;
  25   }
  26   b[0] = (unsigned char) ((a->sign == MP_ZPOS) ? 0 : 1);
  27   return MP_OKAY;
  28 }
  29 #endif
  30
  31 /* $Source: /cvs/libtom/libtommath/bn_mp_to_signed_bin.c,v $ */
  32 /* $Revision: 1.3 $ */
  33 /* $Date: 2006/03/31 14:18:44 $ */