iw7-mod/deps/libtommath/mp_complement.c

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2024-08-13 05:15:34 -04:00
#include "tommath_private.h"
#ifdef MP_COMPLEMENT_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
/* b = ~a */
mp_err mp_complement(const mp_int *a, mp_int *b)
{
mp_int a_ = *a;
a_.sign = ((a_.sign == MP_ZPOS) && !mp_iszero(a)) ? MP_NEG : MP_ZPOS;
return mp_sub_d(&a_, 1uL, b);
}
#endif