diff options
Diffstat (limited to 'libtommath/bn_mp_mul_d.c')
| -rw-r--r-- | libtommath/bn_mp_mul_d.c | 32 |
1 files changed, 9 insertions, 23 deletions
diff --git a/libtommath/bn_mp_mul_d.c b/libtommath/bn_mp_mul_d.c index 936e133..b56dfa3 100644 --- a/libtommath/bn_mp_mul_d.c +++ b/libtommath/bn_mp_mul_d.c @@ -1,28 +1,20 @@ #include "tommath_private.h" #ifdef BN_MP_MUL_D_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 */ /* multiply by a digit */ -int mp_mul_d(const mp_int *a, mp_digit b, mp_int *c) +mp_err mp_mul_d(const mp_int *a, mp_digit b, mp_int *c) { mp_digit u, *tmpa, *tmpc; mp_word r; - int ix, res, olduse; + mp_err err; + int ix, olduse; /* make sure c is big enough to hold a*b */ if (c->alloc < (a->used + 1)) { - if ((res = mp_grow(c, a->used + 1)) != MP_OKAY) { - return res; + if ((err = mp_grow(c, a->used + 1)) != MP_OKAY) { + return err; } } @@ -50,7 +42,7 @@ int mp_mul_d(const mp_int *a, mp_digit b, mp_int *c) *tmpc++ = (mp_digit)(r & (mp_word)MP_MASK); /* send carry into next iteration */ - u = (mp_digit)(r >> (mp_word)DIGIT_BIT); + u = (mp_digit)(r >> (mp_word)MP_DIGIT_BIT); } /* store final carry [if any] and increment ix offset */ @@ -58,9 +50,7 @@ int mp_mul_d(const mp_int *a, mp_digit b, mp_int *c) ++ix; /* now zero digits above the top */ - while (ix++ < olduse) { - *tmpc++ = 0; - } + MP_ZERO_DIGITS(tmpc, olduse - ix); /* set used count */ c->used = a->used + 1; @@ -69,7 +59,3 @@ int mp_mul_d(const mp_int *a, mp_digit b, mp_int *c) return MP_OKAY; } #endif - -/* ref: $Format:%D$ */ -/* git commit: $Format:%H$ */ -/* commit time: $Format:%ai$ */ |