X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/4b536f423c90ba7ca41d3f95f31b17729152a403..8404fd750e8d1a635ccb3895e4f0e155e5f5e3cf:/mp-sqrt.c

diff --git a/mp-sqrt.c b/mp-sqrt.c
index 6b0f602..83880f9 100644
--- a/mp-sqrt.c
+++ b/mp-sqrt.c
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: mp-sqrt.c,v 1.2 2000/10/08 12:02:21 mdw Exp $
+ * $Id: mp-sqrt.c,v 1.4 2004/03/27 17:54:11 mdw Exp $
  *
  * Compute integer square roots
  *
@@ -30,6 +30,13 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: mp-sqrt.c,v $
+ * Revision 1.4  2004/03/27 17:54:11  mdw
+ * Standard curves and curve checking.
+ *
+ * Revision 1.3  2001/02/03 12:00:29  mdw
+ * Now @mp_drop@ checks its argument is non-NULL before attempting to free
+ * it.  Note that the macro version @MP_DROP@ doesn't do this.
+ *
  * Revision 1.2  2000/10/08 12:02:21  mdw
  * Use @MP_EQ@ instead of @MP_CMP@.
  *
@@ -71,8 +78,7 @@ mp *mp_sqrt(mp *d, mp *a)
 
   MP_SHRINK(a);
   if (a->v == a->vl) {
-    if (d)
-      mp_drop(d);
+    mp_drop(d);
     return (MP_ZERO);
   }
 
@@ -82,7 +88,6 @@ mp *mp_sqrt(mp *d, mp *a)
   z >>= 1;
   mp_copy(a);
   d = mp_lsr(d, a, z);
-  mp_drop(a);
 
   /* --- Main approximation --- *
    *
@@ -115,9 +120,9 @@ mp *mp_sqrt(mp *d, mp *a)
 
   /* --- Finished, at last --- */
 
+  mp_drop(a);
   mp_drop(q);
-  if (r)
-    mp_drop(r);
+  mp_drop(r);
   return (d);
 }