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comparison bn_mp_neg.c @ 190:d8254fc979e9 libtommath-orig LTM_0.35

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Initial import of libtommath 0.35
author Matt Johnston <matt@ucc.asn.au>
date Fri, 06 May 2005 08:59:30 +0000
parents d29b64170cf0
children
comparison
equal deleted inserted replaced
142:d29b64170cf0 190:d8254fc979e9
17 17
18 /* b = -a */ 18 /* b = -a */
19 int mp_neg (mp_int * a, mp_int * b) 19 int mp_neg (mp_int * a, mp_int * b)
20 { 20 {
21 int res; 21 int res;
22 if ((res = mp_copy (a, b)) != MP_OKAY) { 22 if (a != b) {
23 return res; 23 if ((res = mp_copy (a, b)) != MP_OKAY) {
24 return res;
25 }
24 } 26 }
27
25 if (mp_iszero(b) != MP_YES) { 28 if (mp_iszero(b) != MP_YES) {
26 b->sign = (a->sign == MP_ZPOS) ? MP_NEG : MP_ZPOS; 29 b->sign = (a->sign == MP_ZPOS) ? MP_NEG : MP_ZPOS;
30 } else {
31 b->sign = MP_ZPOS;
27 } 32 }
33
28 return MP_OKAY; 34 return MP_OKAY;
29 } 35 }
30 #endif 36 #endif