diff options
Diffstat (limited to 'libtommath/bn_mp_mul_2.c')
| -rw-r--r-- | libtommath/bn_mp_mul_2.c | 33 |
1 files changed, 9 insertions, 24 deletions
diff --git a/libtommath/bn_mp_mul_2.c b/libtommath/bn_mp_mul_2.c index 2ed5516..bc0691a 100644 --- a/libtommath/bn_mp_mul_2.c +++ b/libtommath/bn_mp_mul_2.c @@ -1,26 +1,18 @@ #include "tommath_private.h" #ifdef BN_MP_MUL_2_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 */ /* b = a*2 */ -int mp_mul_2(const mp_int *a, mp_int *b) +mp_err mp_mul_2(const mp_int *a, mp_int *b) { - int x, res, oldused; + int x, oldused; + mp_err err; /* grow to accomodate result */ if (b->alloc < (a->used + 1)) { - if ((res = mp_grow(b, a->used + 1)) != MP_OKAY) { - return res; + if ((err = mp_grow(b, a->used + 1)) != MP_OKAY) { + return err; } } @@ -43,7 +35,7 @@ int mp_mul_2(const mp_int *a, mp_int *b) /* get what will be the *next* carry bit from the * MSB of the current digit */ - rr = *tmpa >> (mp_digit)(DIGIT_BIT - 1); + rr = *tmpa >> (mp_digit)(MP_DIGIT_BIT - 1); /* now shift up this digit, add in the carry [from the previous] */ *tmpb++ = ((*tmpa++ << 1uL) | r) & MP_MASK; @@ -64,16 +56,9 @@ int mp_mul_2(const mp_int *a, mp_int *b) /* now zero any excess digits on the destination * that we didn't write to */ - tmpb = b->dp + b->used; - for (x = b->used; x < oldused; x++) { - *tmpb++ = 0; - } + MP_ZERO_DIGITS(b->dp + b->used, oldused - b->used); } b->sign = a->sign; return MP_OKAY; } #endif - -/* ref: $Format:%D$ */ -/* git commit: $Format:%H$ */ -/* commit time: $Format:%ai$ */ |