factorial: Fix usage message to fit in with conventions.

[u/mdw/catacomb] / mp-jacobi.c

diff --git a/mp-jacobi.c b/mp-jacobi.c
index aba168e..47cd2f4 100644 (file)
--- a/mp-jacobi.c
+++ b/mp-jacobi.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mp-jacobi.c,v 1.3 2000/07/20 17:14:34 mdw Exp $
+ * $Id$
  *
  * Compute Jacobi symbol
  *
@@ -27,20 +27,6 @@
  * 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;
     }