Mercurial > dropbear

diff 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
line wrap: on
line diff
--- a/bn_mp_neg.c	Sun Dec 19 11:33:56 2004 +0000
+++ b/bn_mp_neg.c	Fri May 06 08:59:30 2005 +0000
@@ -19,12 +19,18 @@
 int mp_neg (mp_int * a, mp_int * b)
 {
   int     res;
-  if ((res = mp_copy (a, b)) != MP_OKAY) {
-    return res;
+  if (a != b) {
+     if ((res = mp_copy (a, b)) != MP_OKAY) {
+        return res;
+     }
   }
+
   if (mp_iszero(b) != MP_YES) {
      b->sign = (a->sign == MP_ZPOS) ? MP_NEG : MP_ZPOS;
+  } else {
+     b->sign = MP_ZPOS;
   }
+
   return MP_OKAY;
 }
 #endif