30 lines
628 B
C
30 lines
628 B
C
|
#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
|