Mercurial > dropbear
diff libtommath/bn_mp_count_bits.c @ 1692:1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
* update C files
* update other files
* update headers
* update makefiles
* remove mp_set/get_double()
* use ltm 1.2.0 API
* update ltm_desc
* use bundled tommath if system-tommath is too old
* XMALLOC etc. were changed to MP_MALLOC etc.
| author | Steffen Jaeckel <s@jaeckel.eu> |
|---|---|
| date | Tue, 26 May 2020 17:36:47 +0200 |
| parents | f52919ffd3b1 |
| children |
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--- a/libtommath/bn_mp_count_bits.c Tue May 26 23:27:26 2020 +0800 +++ b/libtommath/bn_mp_count_bits.c Tue May 26 17:36:47 2020 +0200 @@ -1,16 +1,7 @@ #include "tommath_private.h" #ifdef BN_MP_COUNT_BITS_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. - * - * SPDX-License-Identifier: Unlicense - */ +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ /* returns the number of bits in an int */ int mp_count_bits(const mp_int *a) @@ -19,23 +10,19 @@ mp_digit q; /* shortcut */ - if (a->used == 0) { + if (MP_IS_ZERO(a)) { return 0; } /* get number of digits and add that */ - r = (a->used - 1) * DIGIT_BIT; + r = (a->used - 1) * MP_DIGIT_BIT; /* take the last digit and count the bits in it */ q = a->dp[a->used - 1]; - while (q > (mp_digit)0) { + while (q > 0u) { ++r; - q >>= (mp_digit)1; + q >>= 1u; } return r; } #endif - -/* ref: HEAD -> master, tag: v1.1.0 */ -/* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */ -/* commit time: 2019-01-28 20:32:32 +0100 */