X-Git-Url: https://git.distorted.org.uk/~mdw/catacomb/blobdiff_plain/774d32a5b60c5e7d38fba874a42e2273c49889fc..45c0fd363937c6e9b05da04a9167e9912c05ca0c:/mp-jacobi.c

diff --git a/mp-jacobi.c b/mp-jacobi.c
index aba168eb..d0a67b67 100644
--- a/mp-jacobi.c
+++ b/mp-jacobi.c
@@ -1,13 +1,13 @@
 /* -*-c-*-
  *
- * $Id: mp-jacobi.c,v 1.3 2000/07/20 17:14:34 mdw Exp $
+ * $Id$
  *
  * Compute Jacobi symbol
  *
  * (c) 1999 Straylight/Edgeware
  */
 
-/*----- Licensing notice --------------------------------------------------* 
+/*----- Licensing notice --------------------------------------------------*
  *
  * This file is part of Catacomb.
  *
@@ -15,32 +15,18 @@
  * it under the terms of the GNU Library General Public License as
  * published by the Free Software Foundation; either version 2 of the
  * License, or (at your option) any later version.
- * 
+ *
  * Catacomb is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Library General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Library General Public
  * License along with Catacomb; if not, write to the Free
  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  * MA 02111-1307, USA.
  */
 
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: mp-jacobi.c,v $
- * Revision 1.3  2000/07/20 17:14:34  mdw
- * Simplify by using @mp_odd@.
- *
- * Revision 1.2  1999/12/10 23:19:02  mdw
- * Improve error-checking.
- *
- * Revision 1.1  1999/11/22 20:50:37  mdw
- * Add support for computing Jacobi symbols.
- *
- */
-
 /*----- Header files ------------------------------------------------------*/
 
 #include "mp.h"
@@ -64,6 +50,8 @@ int mp_jacobi(mp *a, mp *n)
 {
   int s = 1;
 
+  assert(MP_ODDP(n));
+
   /* --- Take copies of the arguments --- */
 
   a = MP_COPY(a);
@@ -78,7 +66,7 @@ int mp_jacobi(mp *a, mp *n)
     /* --- Some simple special cases --- */
 
     MP_SHRINK(a);
-    if (MP_LEN(a) == 0) {
+    if (MP_ZEROP(a)) {
       s = 0;
       goto done;
     }