LCOV - code coverage report
Current view: top level - source4/heimdal/lib/hcrypto/libtommath - bn_mp_copy.c (source / functions) Hit Total Coverage
Test: coverage report for abartlet/fix-coverage dd10fb34 Lines: 13 15 86.7 %
Date: 2021-09-23 10:06:22 Functions: 1 1 100.0 %

          Line data    Source code
       1             : #include <tommath.h>
       2             : #ifdef BN_MP_COPY_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://libtom.org
      16             :  */
      17             : 
      18             : /* copy, b = a */
      19             : int
      20      266218 : mp_copy (mp_int * a, mp_int * b)
      21             : {
      22             :   int     res, n;
      23             : 
      24             :   /* if dst == src do nothing */
      25      266218 :   if (a == b) {
      26      252430 :     return MP_OKAY;
      27             :   }
      28             : 
      29             :   /* grow dest */
      30        5530 :   if (b->alloc < a->used) {
      31        4616 :      if ((res = mp_grow (b, a->used)) != MP_OKAY) {
      32           0 :         return res;
      33             :      }
      34             :   }
      35             : 
      36             :   /* zero b and copy the parameters over */
      37             :   {
      38             :     register mp_digit *tmpa, *tmpb;
      39             : 
      40             :     /* pointer aliases */
      41             : 
      42             :     /* source */
      43        5530 :     tmpa = a->dp;
      44             : 
      45             :     /* destination */
      46        5530 :     tmpb = b->dp;
      47             : 
      48             :     /* copy all the digits */
      49      341395 :     for (n = 0; n < a->used; n++) {
      50      335865 :       *tmpb++ = *tmpa++;
      51             :     }
      52             : 
      53             :     /* clear high digits */
      54        5296 :     for (; n < b->used; n++) {
      55           0 :       *tmpb++ = 0;
      56             :     }
      57             :   }
      58             : 
      59             :   /* copy used count and sign */
      60        5530 :   b->used = a->used;
      61        5530 :   b->sign = a->sign;
      62        5530 :   return MP_OKAY;
      63             : }
      64             : #endif
      65             : 
      66             : /* $Source: /cvs/libtom/libtommath/bn_mp_copy.c,v $ */
      67             : /* $Revision: 1.4 $ */
      68             : /* $Date: 2006/12/28 01:25:13 $ */

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