File: bn_mp_neg.c

package info (click to toggle)
tcl9.0 9.0.1%2Bdfsg-2
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 35,828 kB
  • sloc: ansic: 216,761; tcl: 24,169; makefile: 3,524; sh: 2,553; ada: 1,681; pascal: 1,139; cpp: 1,001; cs: 879; yacc: 833; asm: 468; perl: 420; xml: 95
file content (24 lines) | stat: -rw-r--r-- 482 bytes parent folder | download | duplicates (19) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
#include "tommath_private.h"
#ifdef BN_MP_NEG_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */

/* b = -a */
mp_err mp_neg(const mp_int *a, mp_int *b)
{
   mp_err err;
   if (a != b) {
      if ((err = mp_copy(a, b)) != MP_OKAY) {
         return err;
      }
   }

   if (!MP_IS_ZERO(b)) {
      b->sign = (a->sign == MP_ZPOS) ? MP_NEG : MP_ZPOS;
   } else {
      b->sign = MP_ZPOS;
   }

   return MP_OKAY;
}
#endif