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#include "tommath_private.h"
#ifdef MP_COPY_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
/* copy, b = a */
mp_err mp_copy(const mp_int *a, mp_int *b)
{
mp_err err;
/* if dst == src do nothing */
if (a == b) {
return MP_OKAY;
}
/* grow dest */
if ((err = mp_grow(b, a->used)) != MP_OKAY) {
return err;
}
/* copy everything over and zero high digits */
s_mp_copy_digs(b->dp, a->dp, a->used);
s_mp_zero_digs(b->dp + a->used, b->used - a->used);
b->used = a->used;
b->sign = a->sign;
return MP_OKAY;
}
#endif
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