diff options
Diffstat (limited to 'libtommath/bn_mp_2expt.c')
| -rw-r--r-- | libtommath/bn_mp_2expt.c | 51 |
1 files changed, 17 insertions, 34 deletions
diff --git a/libtommath/bn_mp_2expt.c b/libtommath/bn_mp_2expt.c index 989bb9f..0ae3df1 100644 --- a/libtommath/bn_mp_2expt.c +++ b/libtommath/bn_mp_2expt.c @@ -1,48 +1,31 @@ -#include <tommath_private.h> +#include "tommath_private.h" #ifdef BN_MP_2EXPT_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. - * - * The library is free for all purposes without any express - * guarantee it works. - * - * Tom St Denis, tstdenis82@gmail.com, http://libtom.org - */ +/* LibTomMath, multiple-precision integer library -- Tom St Denis */ +/* SPDX-License-Identifier: Unlicense */ -/* computes a = 2**b +/* computes a = 2**b * * Simple algorithm which zeroes the int, grows it then just sets one bit * as required. */ -int -mp_2expt (mp_int * a, int b) +mp_err mp_2expt(mp_int *a, int b) { - int res; + mp_err err; - /* zero a as per default */ - mp_zero (a); + /* zero a as per default */ + mp_zero(a); - /* grow a to accomodate the single bit */ - if ((res = mp_grow (a, (b / DIGIT_BIT) + 1)) != MP_OKAY) { - return res; - } + /* grow a to accomodate the single bit */ + if ((err = mp_grow(a, (b / MP_DIGIT_BIT) + 1)) != MP_OKAY) { + return err; + } - /* set the used count of where the bit will go */ - a->used = (b / DIGIT_BIT) + 1; + /* set the used count of where the bit will go */ + a->used = (b / MP_DIGIT_BIT) + 1; - /* put the single bit in its place */ - a->dp[b / DIGIT_BIT] = ((mp_digit)1) << (b % DIGIT_BIT); + /* put the single bit in its place */ + a->dp[b / MP_DIGIT_BIT] = (mp_digit)1 << (mp_digit)(b % MP_DIGIT_BIT); - return MP_OKAY; + return MP_OKAY; } #endif - -/* ref: $Format:%D$ */ -/* git commit: $Format:%H$ */ -/* commit time: $Format:%ai$ */ |