bn_mp_abs.c 959 Bytes
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#include "tommath_private.h"
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#ifdef BN_MP_ABS_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.
 *
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 * SPDX-License-Identifier: Unlicense
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 */

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/* b = |a|
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 *
 * Simple function copies the input and fixes the sign to positive
 */
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int mp_abs(const mp_int *a, mp_int *b)
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{
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   int     res;
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   /* copy a to b */
   if (a != b) {
      if ((res = mp_copy(a, b)) != MP_OKAY) {
         return res;
      }
   }
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   /* force the sign of b to positive */
   b->sign = MP_ZPOS;
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   return MP_OKAY;
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}
#endif

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/* ref:         HEAD -> master, tag: v1.1.0 */
/* git commit:  08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
/* commit time: 2019-01-28 20:32:32 +0100 */