LCOV - code coverage report
Current view: top level - source4/heimdal/lib/hcrypto/libtommath - bn_mp_count_bits.c (source / functions) Hit Total Coverage
Test: coverage report for abartlet/fix-coverage dd10fb34 Lines: 8 9 88.9 %
Date: 2021-09-23 10:06:22 Functions: 1 1 100.0 %

          Line data    Source code
       1             : #include <tommath.h>
       2             : #ifdef BN_MP_COUNT_BITS_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             : /* returns the number of bits in an int */
      19             : int
      20        4962 : mp_count_bits (mp_int * a)
      21             : {
      22             :   int     r;
      23             :   mp_digit q;
      24             : 
      25             :   /* shortcut */
      26        4962 :   if (a->used == 0) {
      27           0 :     return 0;
      28             :   }
      29             : 
      30             :   /* get number of digits and add that */
      31        4962 :   r = (a->used - 1) * DIGIT_BIT;
      32             : 
      33             :   /* take the last digit and count the bits in it */
      34        4962 :   q = a->dp[a->used - 1];
      35       66476 :   while (q > ((mp_digit) 0)) {
      36       56552 :     ++r;
      37       56552 :     q >>= ((mp_digit) 1);
      38             :   }
      39        4768 :   return r;
      40             : }
      41             : #endif
      42             : 
      43             : /* $Source: /cvs/libtom/libtommath/bn_mp_count_bits.c,v $ */
      44             : /* $Revision: 1.4 $ */
      45             : /* $Date: 2006/12/28 01:25:13 $ */

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