t8-mod/deps/libtommath/mp_neg.c

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2024-02-15 15:46:47 -05:00
#include "tommath_private.h"
#ifdef MP_NEG_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
/* b = -a */
mp_err mp_neg(const mp_int *a, mp_int *b)
{
mp_err err;
if ((err = mp_copy(a, b)) != MP_OKAY) {
return err;
}
b->sign = ((!mp_iszero(b) && !mp_isneg(b)) ? MP_NEG : MP_ZPOS);
return MP_OKAY;
}
#endif